Worcester Bosch boiler service mode

24CDi BF Wall Mounted Combination Boiler for Central Heating and Mains Fed Domestic Hot Water

Covers: 24CDi BF

GC 47-311-29

Enter Service Mode / Adjust Burner Pressure

1. Undo the two screws and hinge down the facia to gain access to the mode switch.
2. Set the gas valve mode switch, at the rear of the facia, to the minimum position to drop burner pressure to minimum (2mbar for natural gas).
3. Set the gas valve mode switch to the maximum position to achieve maximum burner pressure (13.2mbar for natural gas).
4. Set the gas valve mode switch back to the normal position after adjustments.
5. Turn off the electricity supply, and then back on again to reset the controls.

From manual 47 311 29, page 16.

The burner pressure is factory set and if (after checking that the supply pressure is sufficient) the correct pressure is not obtained then Worcester Heat Systems Service Department should be contacted. (page 16)

24CDi OF Wall Mounted Combination Boiler

Covers: 24 CDi - L OF, 24 CDi OF

GC 47-311-32, 47-311-33

Enter Service Mode (Maximum Rate for Flue Gas Measurement / Setting Pressure)

1. Switch on the appliance.
2. Switch to DHW and CH mode.
3. Hinge down the facia.
4. Turn the Mode Switch to the 'Max.' position.
5. Wait until the appliance reaches stationary equilibrium (approx. 10 minutes).

From manual 8 716 145 064L, page 17.

Force Minimum Rate

1. Set the gas valve mode switch, at the rear of the facia, to the minimum position.

From manual 8 716 145 064L, page 15.

Force Maximum Rate

1. Set the gas valve mode switch, at the rear of the facia, to the maximum position.

From manual 8 716 145 064L, page 15.

Exit Service Mode

1. Turn the Mode Switch back to the 'normal' position.
2. Put the facia back in to its normal position.

From manual 8 716 145 064L, page 17.

The burner pressure is factory set and if (after checking that the supply pressure is sufficient) the correct pressure is not obtained then Worcester Heat Systems Service Department should be contacted. (page )

24CDi/28CDi/35CDi II RSF Wall Mounted Combination Boiler

Covers: 24 CDi RSF, 24CDi RSF Serial ASC

GC 47-311-30, 47-311-31

Entering Service Mode / Setting Max and Min Burner Pressure

1. Undo the two screws and hinge down the facia to gain access to the mode switch.
2. Set the gas valve mode switch, at the rear of the facia, to the maximum position (or minimum position for min pressure).
3. Turn on the gas and electricity supplies.
4. Set the CH temperature control knob fully anti-clockwise and the DHW temperature to MAX (for DHW mode testing).
5. Open a hot water tap to initiate burner operation at maximum or minimum as selected by the mode switch.
6. Adjust the minimum or maximum pressure adjuster on the gas valve (rotate Allen key clockwise to increase, anti-clockwise to decrease).

From the installation and servicing manual, page 18.

CO₂ and CO from the installation and servicing manual, page 20. Check against the data badge.

The burner pressure is factory set and if (after checking that the supply pressure is sufficient) the correct pressure is not obtained then Worcester Heat Systems Service Department should be contacted. (page )

24CDi/28CDi/35CDi II RSF Wall Mounted Combination Boiler (manual 8 716 102 567K 10/05)

Covers: 35 CDi II RSF

GC 47-311-58, 47-311-59

Enter Service Mode / Force Max and Min Rate

1. Undo the two screws and hinge down the facia to gain access to the mode switch.
2. Set the gas valve mode switch, at the rear of the facia, to the maximum position to force maximum rate.
3. Set the gas valve mode switch to the minimum position to force minimum rate.
4. Set the gas valve mode switch back to the normal position when finished.

From manual 8 716 102 567K 10/05, page 18.

The burner pressure is factory set and if (after checking that the supply pressure is sufficient) the correct pressure is not obtained then Worcester Bosch Service Department should be contacted. (page )

24CDi/28CDi/35CDi II RSF WALL MOUNTED COMBINATION BOILER FOR CENTRAL HEATING AND MAINS FED DOMESTIC HOT WATER

Covers: 24/28/35 CDi MkII

Accessing Service Positions / Gas Valve Mode Switch

1. Undo the two screws and hinge down the facia to gain access to the mode switch and gas valve adjustments.
2. Set the gas valve mode switch at the rear of the facia to the desired position (Minimum, Maximum, or Normal).
3. Isolate the mains electricity supply before removing any covers.

From manual 8 716 102 567K, page 17.

The burner pressure is factory set and if (after checking that the supply pressure is sufficient) the correct pressure is not obtained then Worcester Bosch Service Department should be contacted. (page 19)

24i / 28i junior Wall Mounted Combination Boilers for Central Heating and Mains Fed Domestic Hot Water

Covers: 24i Junior, 24i/28i Junior, 28i Junior

GC 47-311-69, 47-311-70, 47-311-71, 47-311-72

Setting Burner Pressure / Service Mode Operation

1. Unscrew and remove the control connector cover to display the mode switch.
2. Check that all radiator valves are open, and the system is fully vented and pressurised.
3. Set the temperature control knob to maximum and clock/programmer to operate continuously.
4. Fully open a hot tap.
5. Set the mode switch to MAX to check/adjust maximum burner pressure.
6. Set the mode switch to MIN to check/adjust minimum burner pressure.
7. Set the mode switch back to Normal after completion.
8. Turn the electricity supply off and then back on to reset the controls.
9. Replace the controls connector cover.

From manual 8 716 108 402b, page 24.

CO₂ and CO from manual 8 716 108 402b, page 22. Check against the data badge.

Turn off the gas supply and electrically isolate the appliance before replacing any components. The maximum burner pressure must be set first, as any adjustment of the maximum pressure influences the minimum pressure setting. (page 25)

24Si II / 28Si II Wall Mounted Combination Boilers for Central Heating and Mains Fed Domestic Hot Water

Covers: 24 Si II RSF, 28 Si II RSF

GC 47-311-65, 47-311-66, 47-311-67, 47-311-68

Force Max / Min Rate using Gas Valve Mode Switch

1. Unscrew and remove the control connector cover to display the mode switch.
2. Set the mode switch to MAX to operate the burner at maximum domestic hot water pressure for 1 minute.
3. Set the mode switch to MIN to drop the burner pressure to the minimum burner pressure appropriate to the appliance and the gas for both central heating and domestic hot water modes.
4. Set the mode switch back to Normal when complete.
5. Turn the electricity supply off and then back on to reset the controls.

From manual 8 716 105 781a, page 20.

CO₂ and CO from manual 8 716 105 781a, page 21. Check against the data badge.

The appliance is fully set up in the factory and no adjustment should be necessary. The burner pressure is factory set and if, after checking that the dynamic (working) supply pressure is sufficient i.e. 19.0mb approx. [NG] or 36mbar approx. [LPG] at the gas valve inlet pressure test point, the correct pressure cannot be obtained then Worcester Heat Systems Service Department should be contacted. (page 19)

25Si / 28Si Wall Mounted Combination Boilers For Central Heating And Mains Fed Domestic Hot Water

Covers: 25Si, 28 Si RSF, British Gas/Scottish C1 RSF

GC 47-311-49, 47-311-50, 47-311-51, 47-311-52

Entering Service Mode / Forcing Max & Min Rate

1. Remove the clip-on facia bottom cover and controls connections cover.
2. Slide down the access panel to display the mode switch and the adjusting tool.
3. Set the mode switch to MAX using the mode adjuster tool. Two red lights will flash rapidly on the facia, and the burner pressure will go to maximum.
4. Set the mode switch to MIN. Two red lights will flash rapidly on the facia, and the burner pressure will drop to the minimum pressure appropriate to the appliance and gas.
5. Set the mode switch back to Normal when finished.

From manual 8 716 145 197, page 19.

CO₂ and CO from manual 8 716 145 197, page 20. Check against the data badge.

The burner pressure is factory set and if, after checking that the dynamic (working) supply pressure is sufficient... the correct pressure cannot be obtained then Worcester Heat Systems Service Department should be contacted. (page 19)

26CDi XTRA Wall Mounted Condensing Combination Boiler for Central Heating and Mains Fed Domestic Hot Water

Covers: 26 CDi Xtra, 26 CDi Xtra RSF

GC 47-311-41, 47-311-42

Force Max/Min Rate & Burner Pressure Adjustment

1. Undo the two upper screws and hinge down the facia.
2. Set the gas valve mode switch, located at the rear of the facia, to the maximum position.
3. Turn on a hot water tap and turn on the gas and electricity supplies.
4. Set the gas valve mode switch to the normal position.
5. Turn both the central heating control knob and the domestic water control knob to their maximum position (fully clockwise).
6. Turn off the hot water tap, let the burner pressure drop to minimum and ramp up to maximum central heating setting.
7. Set the gas valve mode switch to the minimum position to check minimum pressure.

From manual 8 716 145 159, page 21.

The burner setting pressure is factory set and if (after checking that the supply pressure is sufficient) the correct pressure is not obtained then Worcester Heat Systems Service Department should be contacted. (page 21)

28i RSF

Covers: 28i RSF

GC 47-311-54

Entering Service / Setting Burner Pressures

1. Switch the appliance off and then on to reset the control.
2. Start the appliance in the domestic hot water mode by opening a hot tap to give a maximum flow rate.
3. Adjust the maximum pressure adjustment (2mm Allen screw on the gas valve) to give a burner pressure of 13.5 mbar on natural gas.
4. End the demand and reset the appliance by interrupting the mains electricity supply.
5. Open a hot tap and remove one of the blue leads from the modulating solenoid on the gas valve to ensure that the burner pressure remains at the minimum setting.
6. Adjust the minimum pressure to 1 mbar using a 3mm Allen key.
7. Replace the blue lead and re-check the pressures.

From manual 8 716 145 299g, page 24.

CO₂ and CO from manual 8 716 145 299g, page 21. Check against the data badge.

It should not be necessary for the gas valve to be adjusted. (page )

35CDi Wall Mounted Combination Boiler

Covers: 35 CDi RSF

GC 47-311-39

Entering Service Mode / Checking Combustion Performance

1. Remove the screw at the sample point, on top of the appliance.
2. Connect the sampling meter.
3. Operate the appliance at maximum rate and stable in the DHW mode.
4. Refit and tighten the screw after the test.

From manual 8 716 145 143, page 19.

The pressures have been set at the factory and no adjustment of the gas valve should be necessary. (page 18)

British Gas 532/537/542 Wall Hung RSF Gas-Fired Condensing Combination Boiler

Covers: British 532/I, British 537/I

GC 47-406-02, 47-406-03, 47-406-04, 47-406-05

Entering Service Mode / Setting Boiler to Maximum

1. Press central heating boost button (L) for ten seconds and set Central Heating temperature to maximum.
2. The central heating boost button will illuminate continually.
3. The boiler will stay in this mode for 15 minutes unless the central heating boost button is pressed again.

From manual 6 720 612 350-0010, page 36.

Exiting Service Mode

1. Press the central heating boost button again to return the boiler to normal operation, or wait for the control to automatically return after 15 minutes.

From manual 6 720 612 350-0010, page 36.

CO₂ and CO from manual 6 720 612 350-0010, page 6. Check against the data badge.

THE COMBUSTION FOR THE APPLIANCE IS FACTORY SET. NO ADJUSTMENT IS REQUIRED IF THE GAS INLET PRESSURE IS CORRECT. (page )

Gas-fired condensing combi appliance Greenstar 2000 GR2300iW C

Covers: Greenstar 2000 GR2300iW 25 C, Greenstar 2000 GR2300iW 30 C

GC 47-800-26, 47-800-27, 47-800-28, 47-800-29

Entering chimney sweep mode (forcing max/min rate)

1. Press the ok button until the chimney symbol appears on the display. The display shows the maximum percentage of the power 100% alternating with the flow temperature.

From manual 6 721 820 552, page 48.

Exiting chimney sweep mode

1. Press the ok button and the appliance will return to normal operation.
2. If left in the chimney sweep mode the control will return to normal operation after 30 minutes.

From manual 6 721 820 552, page 48.

Operating the service menu

1. Press the DHW key and the Heating key simultaneously until the service menu appears.

From manual 6 721 820 552, page 53.

CO₂ and CO from manual 6 721 820 552, page 87, 89. Check against the data badge.

The air/gas ratio valve is factory set and must not be adjusted during commissioning unless this action is recommended following contact with the Worcester, Bosch Group help line 0330 123 3366. (page 50)

Greenstar 1000

Covers: Greenstar 1000 GR1000W 24 C, Greenstar 1000 GR1000W 30 C

GC 47-800-38, 47-800-39

Enter Chimney Sweep Mode

1. Press the chimney sweep symbol button for at least 5 seconds.
2. The appliance enters chimney sweep mode and automatically enters maximum output (100%).

From manual 6721835943, page 44.

Force Minimum Rate

1. Press the chimney-sweep icon for at least 5 seconds (the appliance enters chimney sweep mode and automatically enters maximum output)
2. Press the ▼ button to set the appliance to minimum output

From manual 6721835943, page 44.

Force Maximum Rate

1. Press chimney-sweep symbol for at least 5 seconds.

From manual 6721835943, page 44.

Exit Chimney Sweep Mode

1. Press C and the appliance will return to normal operation (or it will return automatically after 30 minutes).

From manual 6721835943, page 44.

CO₂ and CO from manual 6721835943, page 97. Check against the data badge.

The air/gas ratio valve is factory set and must not be adjusted during commissioning unless this action is recommended following contact with the Worcester, Bosch Group help line 0330 123 3366. (page 45)

Greenstar 12Ri, 15Ri, 18Ri & 24Ri Installation, Commissioning

Covers: Greenstar 12 Ri, Greenstar 15Ri, Greenstar 18Ri, Greenstar 24 Ri

GC 41-311-63, 41-311-64, 41-311-65, 41-311-66, 41-311-75, 41-311-76, 41-311-77, 41-311-78

Entering Service Mode & Forcing Max/Min Rate

1. Remove the three screws retaining the control cover.
2. Clipped inside the cover is a plastic tool used to change the position of the mode switch.
3. Ensure the boiler is powered up and there is a demand from the external controls.
4. Using the tool set the mode switch to maximum or minimum as required.
5. The power indicator will flash and the boiler will stay in this mode for 15 minutes if no further change is made to the switch.
6. After completing measurements, return the mode switch to normal, remove manometer, re-seal test point, and reassemble controls cover.

From manual 8 716 115 168a, page 30.

CO₂ and CO from manual 8 716 115 168a, page 41. Check against the data badge.

THE COMBUSTION FOR THE APPLIANCE IS FACTORY SET. NO ADJUSTMENT IS REQUIRED IF THE GAS INLET PRESSURE IS CORRECT. (page 32)

Greenstar 15SBi / 24SBi

Covers: Greenstar 15sbi

GC 41-311-43, 41-311-45

Checking Burner Pressure (Service/Commissioning)

1. Connect a pressure gauge to the gas valve burner pressure test point.
2. Set the temperature control knob to maximum and the clock/programmer to operate continuously.
3. Turn on gas and electricity supplies.
4. The burner will light and ramp up to factory set pressure.
5. The burner pressure is factory set at the mid point and may be reset to match system requirements by adjusting the screw on the gas valve.
6. If burner does not light, press the 'lock-out' reset button.

From manual 8 716 145 191 e, page 20.

The burner pressure is factory set at the mid point of the range of the boiler and may be reset to match the system requirements. Reset the pressure as necessary by adjusting the screw on the gas valve. Refit the plastic cap and re-seal using the sealing label. (page 20)

Greenstar 2000

Covers: Greenstar 2000 GR2301iW 25 C, Greenstar 2000 GR2301iW 30 C

GC 47-800-34, 47-800-35, 47-800-36, 47-800-37

Entering Chimney Sweep Mode (Maximum / Minimum Rate)

1. Press the ok button for at least 5 seconds.
2. The appliance enters chimney sweep mode and automatically enters maximum output.
3. The display shows the maximum percentage of the power 100% alternating with the flow temperature.
4. The appliance will ramp up to maximum output in approximately 30 to 35 seconds.

From manual 6721839340, page 50.

Exiting Chimney Sweep Mode

1. Press the ok button and the appliance will return to normal operation.
2. If left in the chimney sweep mode the control will return to normal operation after 30 minutes.

From manual 6721839340, page 51.

Opening the Service Menu

1. Press the DHW key (* key) and the Heating key (( key) simultaneously until the service menu appears.

From manual 6721839340, page 56.

Closing the Service Menu

1. Press the DHW key or the Heating key, or press the " (Return) key.

From manual 6721839340, page 56.

CO₂ and CO from manual 6721839340, page 64, 92. Check against the data badge.

The air/gas ratio valve is factory set and must not be adjusted during commissioning unless this action is recommended following contact with the Worcester, Bosch Group help line 0330 123 3366. (page 52)

Greenstar 24/28

Covers: Greenstar 24, Greenstar 28

GC 47-406-32, 47-406-33

Entering Service Level 1

1. Hold down the service key until it illuminates.
2. The display shows a code such as 1.A (service level 1).

From manual 6 720 800 945, page 30.

Entering Service Level 2

1. Hold down the service key until it illuminates.
2. Press eco key and key lock simultaneously until a code such as 8.A appears (service level 2).

From manual 6 720 800 945, page 30.

Forcing Maximum and Minimum Rate (Performance Test / Boost Mode)

1. Hold down the Central Heating boost button until it illuminates.
2. The display shows the flow temperature alternating with max. heating output.
3. Press the Central Heating boost button again and the display will show the flow temperature alternating with max. rated output.

From manual 6 720 800 945, page 34.

CO₂ and CO from manual 6 720 800 945, page 35. Check against the data badge.

Greenstar 24/28/30 Wall Hung RSF Gas Fired Condensing Combination Boiler

Covers: Greenstar 30

GC 47-406-64

Entering service mode

1. Hold down the service key until it illuminates. The display shows a code such as 1.A (service level 1).
2. Press eco key and key lock simultaneously until a code such as 8.A appears (service level 2).
3. Press key lock or eco key until the required service function is displayed.
4. Press and release the Central Heating boost button. The Central Heating boost button illuminates and the display shows the parameter for the selected service function.

From manual 6 720 811 922, page 33.

Forcing max & min rate (Boost Mode / Performance Test)

1. Hold down the Central Heating boost button until it illuminates.
2. 1st press = maximum heating output setting
3. 2nd press = maximum rated output
4. 3rd press = minimum rated output
5. 4th press = EXIT from Central Heating boost.

From manual 6 720 811 922, page 38.

CO₂ and CO from manual 6 720 811 922, page 6. Check against the data badge.

The air/gas ratio valve is factory set and must not be adjusted during commissioning unless this action is recommended following contact with the Worcester, Bosch Group help line 0330 123 3366. (page 31)

Greenstar 24i Junior / 28i Junior (manual 8 716 115 166a)

Covers: Greenstar 24i Junior, Greenstar 28i Junior

GC 47-311-86, 47-311-87, 47-311-90, 47-311-91

Entering Service Mode & Forcing Max/Min Rate

1. Press and HOLD service button (F) for 10 seconds and set Central Heating temperature to maximum.
2. The service button will illuminate continually and the blue power indicator will flash quickly.
3. To operate at maximum output: Turn central heating control to maximum.
4. To operate at minimum output: Set the central heating control to minimum.
5. The boiler will stay in service mode for 15 minutes unless the service button is pressed again.
6. To exit service mode manually: Press and hold the service button for 2 seconds (or press for over a second); the button will cease to be illuminated and the blue power indicator will be permanently illuminated.

From manual 8 716 115 166a, page 35.

CO₂ and CO from manual 8 716 115 166a, page 54. Check against the data badge.

THE COMBUSTION FOR THE APPLIANCE IS FACTORY SET. NO ADJUSTMENT IS REQUIRED IF THE GAS INLET PRESSURE IS CORRECT. (page 35)

Greenstar 24i Junior / 28i Junior (manual 8 716 115 166b)

Covers: Greenstar 24i Junior

GC 47-114-53, 47-311-86, 47-311-87, 47-311-90, 47-311-91, 47-406-54

Enter Service Mode / Force Max Rate

1. Press and hold service button (F) for 10 seconds.
2. Set Central Heating temperature control to maximum.
3. Service button illuminates continually, blue power indicator flashes quickly.
4. Boiler will return to normal operation after 15 minutes or if the service button is pressed again.

From manual 8 716 115 166b, page 35.

Set Min Rate (Dungs/Sit)

1. Enter service mode (as above).
2. Set central heating control to minimum.

From manual 8 716 115 166b, page 54.

CO₂ and CO from manual 8 716 115 166b, page 54. Check against the data badge.

THE COMBUSTION FOR THE APPLIANCE IS FACTORY SET. NO ADJUSTMENT IS REQUIRED IF THE GAS INLET PRESSURE IS CORRECT. (page 35)

GREENSTAR 29 HE Conventional / ZB 7 27 HE (System)

Covers: Greenstar 25HE, ZB 7 27 HE

GC 41-311-58

Enter Service Function Level 1

1. Press and hold the button until the display shows – –.
2. Turn the temperature control to select the required function number.

From manual 6 720 611 137 GB, page 26.

Enter Service Function Level 2

1. Press and hold the buttons and simultaneously until the display shows = =.
2. Turn the temperature control to select the required function number.

From manual 6 720 611 137 GB, page 26.

Force Max Rate / Chimney Sweep Mode

1. Press and hold the button until the display shows – –.
2. Chimney sweep mode is now active and the button will light up.

From manual 6 720 611 137 GB, page 31.

CO₂ and CO from manual 6 720 611 137 GB, page 9. Check against the data badge.

The setting is factory sealed at maximum. Adjustment to the rated heat input and min. heat input is not necessary. (page 28)

Greenstar 30 CDi Classic System

Covers: Greenstar 30 CDi System

GC 41-311-93, 41-311-97

Enter Performance / Service Test Mode (Force Maximum Rate)

1. Press and hold the Performance test button for more than ten seconds (or 10 seconds).
2. Set Central Heating temperature control to maximum.
3. The Performance test button will illuminate continually and the display will alternate between symbol/dash indicators and the central heating flow temperature.

From manual 6 720 647 473, page 32.

Force Minimum Rate

1. First enter the maximum performance test mode as described above.
2. Set the central heating control to minimum. This will make the boiler go to minimum power.

From manual 6 720 647 473, page 39.

Exit Service / Performance Test Mode

1. Press the Performance test button (J) again and the boiler will return to normal operation
2. If left in Performance test mode, the control will return to normal operation after 15 minutes

From manual 6 720 647 473, page 32.

CO₂ and CO from manual 6 720 647 473, page 39. Check against the data badge.

THE COMBUSTION FOR THE APPLIANCE IS FACTORY SET. NO ADJUSTMENT IS REQUIRED IF THE GAS INLET PRESSURE IS CORRECT. (page 32)

Greenstar 4000 Gas-fired condensing combi appliance

Covers: Greenstar 4000 GR4700iW 25 C, Greenstar 4000 GR4700iW 30 C

GC 47-800-30, 47-800-32, 47-800-33

Entering service menu (Chimney sweep mode / Service menu)

1. Press and hold the ( and * keys for approximately 3 seconds to enter the Service menu.
2. Alternatively, press and hold the ok key for 5 seconds until Chimney sweep is displayed to enter chimney sweep mode.
3. Confirm you have read and understood the alert message, press ok.

From manual 6 720 891 161, page 44.

Force max & min rate (Chimney sweep mode)

1. Press and hold the ok key for 5 seconds until Chimney sweep is displayed.
2. Confirm you have read and understood the alert message, press ok.
3. Set the desired rated output using up-arrow or down-arrow for 100% and 10% respectively.
4. To exit the chimney sweep mode, press ok or back-arrow.

From manual 6 720 891 161, page 44.

Exiting service mode / chimney sweep mode

1. Press and hold the ok key for 5 seconds until Chimney sweep is displayed.
2. Confirm you have read and understood the alert message, press ok.
3. Set the desired rated output using up-arrow or down-arrow for 100% and 10% respectively.
4. To exit the chimney sweep mode, press ok or back-arrow.

From manual 6 720 891 161, page 44.

CO₂ and CO from manual 6 720 891 161, page 83, 84. Check against the data badge.

The air/gas ratio valve is factory set and must not be adjusted during commissioning unless this action is recommended following contact with the Worcester, Bosch Group help line 0330 123 3366. (page 46)

Greenstar 4000 Gas-fired condensing system appliance

Covers: Greenstar 4000 GR4700iW 12 S, Greenstar 4000 GR4700iW 15 S, Greenstar 4000 GR4700iW 18 S, Greenstar 4000 GR4700iW 21 S, Greenstar 4000 GR4700iW 24 S

GC 41-800-07, 41-800-08, 41-800-09, 41-800-10, 41-800-11, 41-800-12, 41-800-13, 41-800-14, 41-800-15, 41-800-16

Entering and Exiting Chimney Sweep Mode

1. Press and hold the ok key for 5 seconds until Chimney sweep is displayed.
2. Confirm you have read and understood the alert message, press ok.
3. Set the desired rated output using up-arrow or down-arrow for 100% and 10% respectively.
4. The value is accepted after 2 seconds and marked with a tick.
5. To exit the chimney sweep mode, press ok or back-arrow.

From manual 6 720 891 162, page 44.

Forcing Maximum and Minimum Rate (Chimney Sweep Mode)

1. Press and hold the ok key for 5 seconds until Chimney sweep is displayed.
2. Confirm you have read and understood the alert message, press ok.
3. Set the desired rated output using up-arrow or down-arrow for 100% and 10% respectively.
4. The value is accepted after 2 seconds and marked with a tick.
5. To exit the chimney sweep mode, press ok or back-arrow.

From manual 6 720 891 162, page 44.

Operating the Service Menu

1. Press the tap symbol key and the radiator symbol key simultaneously until the service menu appears.

From manual 6 720 891 162, page 50.

CO₂ and CO from manual 6 720 891 162, page 82. Check against the data badge.

The air/gas ratio valve is factory set and must not be adjusted during commissioning unless this action is recommended following contact with the Worcester, Bosch Group help line 0330 123 3366. (page 47)

Greenstar 8000 F Combi

Covers: Greenstar 8000 F GR8700iF 35 C, Greenstar 8000 F GR8700iF 50 C

GC 47-800-56, 47-800-57, 47-800-58, 47-800-59

Entering and Operating Chimney Sweep Mode

1. Press and hold the ok key for 5 seconds until Chimney sweep is displayed.
2. Confirm you have read and understood the alert message, press ok.
3. Set the desired rated output using up-arrow or down-arrow for Max. and Min. respectively.

From manual 6721106419, page 49.

Setting Appliance to Maximum Rate (Chimney Sweep Mode)

1. A hot water outlet must be opened to prevent the appliance from shutting down due to high temperature during testing.
2. Press the ok key for 5 seconds until Chimney sweep is displayed.
3. Confirm you have read and understood the alert message, press ok.
4. The appliance enters chimney sweep mode and automatically enters maximum output.
5. The display shows “Max.” (power output) and the flow temperature.

From manual 6721106419, page 49.

Setting Appliance to Minimum Rate

1. Press and hold the ok key for 5 seconds until Chimney sweep is displayed.
2. Confirm you have read and understood the alert message, press ok.
3. Set the desired rated output using up-arrow or down-arrow for Max. and Min. respectively.

From manual 6721106419, page 49.

Exiting Chimney Sweep Mode

1. Press ok or d and the appliance will return to normal operation.
2. If left in the chimney sweep mode the boiler will return to normal operation after 15 minutes.

From manual 6721106419, page 49.

Opening the Service Menu

1. Press the menu button and the radiator key simultaneously until the service menu appears.

From manual 6721106419, page 55.

CO₂ and CO from manual 6721106419, page 68. Check against the data badge.

The air/gas ratio valve is factory set and must not be adjusted during commissioning unless this action is recommended following contact with the Worcester, Bosch Group help line 0330 123 3366. (page 52)

Greenstar 8000 F Regular

Covers: Greenstar 8000 F GR8700iF 35 R, Greenstar 8000 F GR8700iF 50 R

GC 41-800-41, 41-800-42, 41-800-43, 41-800-44

Entering chimney sweep mode

1. Press and hold the ok key for 5 seconds until Chimney sweep is displayed.
2. Confirm you have read and understood the alert message, press ok.
3. Set the desired rated output using ▲ or ▼ for Max and Min respectively. The value is accepted after 2 seconds and marked with a tick.
4. To exit the chimney sweep mode, press ok or ↶.

From manual 6721106420, page 47.

Exiting chimney sweep mode

1. To exit the chimney sweep mode, press ok or d.
2. Alternatively, if left in the chimney sweep mode the boiler will return to normal operation after 15 minutes.

From manual 6721106420, page 47.

Opening the service menu

1. Press the tap symbol key and the radiator symbol key simultaneously until the service menu appears.

From manual 6721106420, page 54.

Closing the service menu

1. Press the tap key and the radiator key simultaneously until the service menu appears.

From manual 6721106420, page 54.

CO₂ and CO from manual 6721106420, page 65. Check against the data badge.

The air/gas ratio valve is factory set and must not be adjusted during commissioning unless this action is recommended following contact with the Worcester, Bosch Group help line 0330 123 3366. (page 51)

Greenstar 8000 Life

Covers: Greenstar 8000 Life GR8300iW 30 S, Greenstar 8000 Life GR8300iW 35 S

GC 41-406-90, 41-406-91, 41-406-92, 41-406-93

Operating the service menu

1. Press the DHW key and the Heating key simultaneously until the service menu appears.

From manual 6720883858, page 46.

Chimney sweep mode

1. Press the OK key until the countdown is completed and the symbol appears.
2. Set the desired rated output min and max using the up-arrow or the down-arrow keys. The value is accepted after 2 seconds.
3. To exit the chimney sweep mode, press the back-arrow key.

From manual 6720883858, page 40.

CO₂ and CO from manual 6720883858, page 54. Check against the data badge.

The gas valve and venturi are factory set and should not need to be adjusted if found to be out of tolerance and when all other possible causes have been checked, please contact the Worcester Bosch Group Helpline 0330 123 3366. (page 54)

Greenstar 8000 Life Gas fired condensing combi boiler

Covers: Greenstar 8000 Life GR8300iW 30 C, Greenstar 8000 Life GR8300iW 35 C, Greenstar 8000 Life GR8300iW 45 C, Greenstar 8000 Life GR8300iW 50 C

GC 47-800-14, 47-800-15, 47-800-17, 47-800-18, 47-800-19, 47-800-20, 47-800-22, 47-800-23

Entering the Service Menu

1. Press the DHW key and the Heating key simultaneously until the service menu appears.

From manual 6720883865, page 53.

Exiting the Service Menu

1. Press the DHW key and the Heating key simultaneously until the service menu appears.

From manual 6720883865, page 53.

Chimney Sweep Mode (Force Max / Min Rate)

1. Press the ok key until the countdown is completed and the symbol appears.
2. Set the desired rated output min and max using the ▲ or the ▼ keys. The value is accepted after 2 seconds.
3. To exit the chimney sweep mode, press the ↺ key.

From manual 6720883865, page 47.

CO₂ and CO from manual 6720883865, page 62. Check against the data badge.

The air/gas ratio valve is factory set and must not be adjusted during commissioning unless this action is recommended following contact with the Worcester, Bosch Group help line 0330 123 3366. (page 49)

Greenstar 8000 Life Gas fired condensing regular boiler

Covers: Greenstar 8000 Life GR8300iW 30 R, Greenstar 8000 Life GR8300iW 35 R, Greenstar 8000 Life GR8300iW 40 R, Greenstar 8000 Life GR8300iW 45 R, Greenstar 8000 Life GR8300iW 50 R

GC 41-406-94, 41-406-95, 41-406-96, 41-406-97, 41-406-98, 41-406-99, 41-800-01, 41-800-02, 41-800-03, 41-800-04

Operating the service menu - Opening

1. Press the DHW key and the Heating key simultaneously until the service menu appears.

From manual 6720883866, page 52.

Operating the service menu - Closing

1. Press the DHW key and the Heating key simultaneously until the service menu appears.

From manual 6720883866, page 52.

Chimney sweep mode

1. Turn on any external controls.
2. Set the thermostatic radiator controls to maximum temperature.
3. Set the clock/programmer to continuously ON and the room thermostat to maximum temperature.
4. Press the ok key when the countdown is completed and Chimney sweep is displayed.
5. Confirm the query with Yes.
6. Set the desired rated output using the ▲ or the ▼ keys. The value is accepted after 2 seconds and marked with a tick.
7. To exit the chimney sweep mode, press the ok key or the ↶ key.

From manual 6720883866, page 45.

CO₂ and CO from manual 6720883866, page 60. Check against the data badge.

The air/gas ratio valve is factory set and must not be adjusted during commissioning unless this action is recommended following contact with the Worcester, Bosch Group help line 0330 123 3366. (page 47)

Greenstar 8000 Style (manual 6720883855)

Covers: Greenstar 8000 Style GR8700iW 30 S, Greenstar 8000 Style GR8700iW 30 SB, Greenstar 8000 Style GR8700iW 35 S, Greenstar 8000 Style GR8700iW 35 SB

GC 41-406-82, 41-406-83, 41-406-84, 41-406-85, 41-406-86, 41-406-87, 41-406-88, 41-406-89

Entering the service menu

1. Press the Hot water key and the Heating key simultaneously until the service menu appears.

From manual 6720883855, page 47.

Closing the service menu

1. Press the Hot water key and the Heating key simultaneously until the service menu appears.

From manual 6720883855, page 47.

Chimney sweep mode (force max & min rate)

1. Press the OK key when the countdown is completed and Chimney sweep is displayed.
2. Confirm the query with Yes.
3. Set the desired rated output using the up-arrow or the down-arrow keys. The value is accepted after 2 seconds and marked with a tick.
4. To exit the chimney sweep mode, press the OK key or the back-arrow key.

From manual 6720883855, page 41.

CO₂ and CO from manual 6720883855, page 57. Check against the data badge.

The air/gas ratio valve is factory set and must not be adjusted during commissioning unless this action is recommended following contact with the Worcester, Bosch Group help line 0330 123 3366. (page 43)

Greenstar 8000 Style (manual 6720883864)

Covers: Greenstar 8000 Style GR8700iW 30 C, Greenstar 8000 Style GR8700iW 30 CB, Greenstar 8000 Style GR8700iW 35 C, Greenstar 8000 Style GR8700iW 35 CB, Greenstar 8000 Style GR8700iW 40 C, Greenstar 8000 Style GR8700iW 40 CB, Greenstar 8000 Style GR8700iW 45 C, Greenstar 8000 Style GR8700iW 45 CB, Greenstar 8000 Style GR8700iW 50 C

GC 47-406-94, 47-406-95, 47-406-96, 47-406-97, 47-406-98, 47-406-99, 47-800-01, 47-800-02, 47-800-03, 47-800-05, 47-800-06, 47-800-07, 47-800-08, 47-800-09, 47-800-10, 47-800-11, 47-800-12, 47-800-13

Entering the service menu

1. Press the Hot water key and the Heating key simultaneously until the service menu appears.

From manual 6720883864, page 47.

Closing the service menu

1. Press the Hot water key and the Heating key simultaneously until the service menu appears.

From manual 6720883864, page 47.

Chimney sweep mode (force max/min rate)

1. Press the OK key when the countdown is completed and Chimney sweep is displayed.
2. Confirm the query with Yes.
3. Set the desired rated output using the ▲ or the ▼ keys. The value is accepted after 2 seconds and marked with a tick.
4. To exit the chimney sweep mode, press the OK key or the ↶ key.

From manual 6720883864, page 41.

CO₂ and CO from manual 6720883864, page 56. Check against the data badge.

The air/gas ratio valve and venturi are factory set and must not be adjusted during commissioning unless this action is recommended following contact with the Worcester, Bosch Group help line 0330 123 3366. (page 43)

Greenstar 8000+ (manual 6721891100)

Covers: Greenstar 8000+ GR8701iW 30 S, Greenstar 8000+ GR8701iW 35 S

GC 41-800-27, 41-800-28, 41-800-34, 41-800-35

Entering the service menu

1. Press the spanner key and the radiator key simultaneously until the service menu appears.

From manual 6721891100, page 52.

Chimney sweep mode

1. Press the ok key when the countdown is completed and Chimney sweep is displayed.
2. Confirm the query with Yes.
3. Set the desired rated output using the ▲ or the ▼ keys. The value is accepted after 2 seconds and marked with a tick.
4. To exit the chimney sweep mode, press the ok key or the ↶ key.

From manual 6721891100, page 46.

CO₂ and CO from manual 6721891100, page 64. Check against the data badge.

The air/gas ratio valve is factory set and must not be adjusted during commissioning unless this action is recommended following contact with the Worcester, Bosch Group help line 0330 123 3366. (page 49)

Greenstar 8000+ (manual 6721891104)

Covers: Greenstar 8000+ GR8701iW 30 R, Greenstar 8000+ GR8701iW 35 R, Greenstar 8000+ GR8701iW 40 R, Greenstar 8000+ GR8701iW 45 R, Greenstar 8000+ GR8701iW 50 R

GC 41-800-29, 41-800-30, 41-800-31, 41-800-32, 41-800-33, 41-800-36, 41-800-37, 41-800-38, 41-800-39, 41-800-40

Entering and Exiting the Service Menu

1. Press the wrench key and the radiator key simultaneously until the service menu appears.

From manual 6721891104, page 50.

Chimney Sweep Mode (Forcing Max and Min Rate)

1. Turn on any external controls.
2. Set the thermostatic radiator controls to maximum temperature.
3. Set the clock/programmer to continuously ON and the room thermostat to maximum temperature.
4. Press the ok key when the countdown is completed and Chimney sweep is displayed.
5. Confirm the query with Yes.
6. Set the desired rated output using the ▲ or the ▼ keys.
7. The value is accepted after 2 seconds and marked with a tick.
8. To exit the chimney sweep mode, press the ok key or the ↶ key.

From manual 6721891104, page 44.

CO₂ and CO from manual 6721891104, page 61. Check against the data badge.

The air/gas ratio valve is factory set and must not be adjusted during commissioning unless this action is recommended following contact with the Worcester, Bosch Group help line 0330 123 3366. (page 47)

Greenstar 8000+ | Greenstar 8000+ Style

Covers: Greenstar 8000+ GR8701iW 32 C, Greenstar 8000+ GR8701iW 40 C, Greenstar 8000+ GR8701iW 45 C, Greenstar 8000+ GR8701iW 50 C, Greenstar 8000+ Style GR8701iW 32 CB Style, Greenstar 8000+ Style GR8701iW 36 CB Style

GC 47-800-44, 47-800-46, 47-800-47, 47-800-48, 47-800-49, 47-800-50, 47-800-51, 47-800-53, 47-800-54, 47-800-55

Entering the Service Menu

1. Press the spanner key and the radiator key simultaneously until the service menu appears.

From manual 6721891026, page 51.

Exiting the Service Menu

1. Press the spanner key and the radiator key simultaneously until the service menu appears.

From manual 6721891026, page 51.

Chimney Sweep Mode (Force Max & Min Rate)

1. Press the ok key when the countdown is completed and Chimney sweep is displayed.
2. Confirm the query with Yes.
3. Set the desired rated output using the ▲ or the ▼ keys. The value is accepted after 2 seconds and marked with a tick.
4. To exit the chimney sweep mode, press the ok key or the ↩ key.

From manual 6721891026, page 45.

CO₂ and CO from manual 6721891026, page 63. Check against the data badge.

The air/gas ratio valve is factory set and must not be adjusted during commissioning unless this action is recommended following contact with the Worcester, Bosch Group help line 0330 123 3366. (page 48)

GREENSTAR CDi CLASSIC

Covers: Greenstar 29CDi Classic, Greenstar 38CDi Classic, Greenstar 42CDi

GC 47-406-10, 47-406-11, 47-406-34, 47-406-35, 47-406-38, 47-406-39

Enter Performance Test Mode (Force Max Rate)

1. Press and HOLD the Performance test button for 10 seconds and set Central Heating temperature to maximum.
2. The Performance test button will illuminate continually.
3. Turn central heating control to maximum; the boiler will then go to maximum output.

From manual 6 720 803 599, page 31.

Force Min Rate

1. Set the central heating control to minimum while in Performance test mode. This will make the boiler go to minimum power.

From manual 6 720 803 599, page 37.

Exit Service / Performance Test Mode

1. Press and hold down the Performance test mode button for two seconds; the button will cease to be illuminated.
2. Alternatively, if left in the Performance test mode the control will return to normal operation after 15 minutes.

From manual 6 720 803 599, page 32.

CO₂ and CO from manual 6 720 803 599, page 37. Check against the data badge.

The combustion for the appliance is factory set. No adjustment is required if the gas inlet pressure is correct. (page 31)

GREENSTAR CDi CLASSIC ErP

Covers: Greenstar 29CDi Classic ErP, Greenstar 34CDi Classic ErP, Greenstar 38CDi Classic ErP, Greenstar 42CDi Classic ErP

GC 47-406-65, 47-406-66, 47-406-67, 47-406-68, 47-406-69, 47-406-70, 47-406-71, 47-406-72

Entering Service Mode / Performance Test Mode

1. Press and hold the Performance test button for more than 10 seconds (or 10 seconds until illuminated).
2. Set Central Heating temperature control to maximum.
3. The Performance test button will illuminate continually.
4. The display will alternate between the symbol for test mode and the central heating flow temperature.
5. To avoid the boiler cycling on low heating demands during CO2 setting, remove the diverter valve motor from the valve body and run the domestic hot water tap throughout the Performance test mode.
6. The control will resume normal operation after 15 minutes or if the Performance test mode button is pressed again for over a second (or pressed for two seconds to cease illumination).

From manual 6 720 815 725, page 34.

Forcing Maximum and Minimum Rate

1. Maximum Rate: Press and hold the Performance test button for 10 seconds and set Central Heating temperature control to maximum.
2. Minimum Rate: Set the central heating control to minimum after entering performance test mode.

From manual 6 720 815 725, page 42.

CO₂ and CO from manual 6 720 815 725, page 42. Check against the data badge.

The combustion for the boiler is factory set. No adjustment is required if the gas inlet pressure is correct. (page 33)

GREENSTAR CDi CLASSIC REGULAR ErP

Covers: Greenstar 30 CDi Classic Regular

GC 41-406-33, 41-406-34

Setting the boiler to maximum rate for commissioning or fan pressure test

1. Press performance test button for ten seconds and set Central Heating temperature control to maximum.
2. The performance test button will illuminate continually.
3. The boiler will stay in this mode for 15 minutes unless the performance test button is pressed again.

From manual 6 720 815 723, page 30.

Setting boiler to minimum rate

1. Set the central heating control to minimum. This will make the boiler go to minimum power.

From manual 6 720 815 723, page 38.

CO₂ and CO from manual 6 720 815 723, page 38. Check against the data badge.

The air/gas ratio valve is factory set and must not be adjusted during commissioning unless this action is recommended following contact with the Worcester, Bosch Group help line 0330 123 3366. (page 32)

Greenstar CDi Classic System ErP

Covers: Greenstar 30CDi Classic System ErP, Greenstar 35 CDi Classic System

GC 41-406-37, 41-406-38, 41-406-39, 41-406-40

Enter Service Mode (Performance Test)

1. Press and HOLD performance test button (J) for 10 seconds.
2. Set Central Heating temperature to maximum.
3. The performance test button will illuminate continually.
4. Boiler stays in this mode for 15 minutes unless button is pressed again.
5. To exit, press the performance test button (J) again.

From manual 6 720 815 724, page 33.

CO₂ and CO from manual 6 720 815 724, page 42. Check against the data badge.

THE COMBUSTION FOR THE APPLIANCE IS FACTORY SET. NO ADJUSTMENT IS REQUIRED IF THE GAS INLET PRESSURE IS CORRECT. (page 33)

Greenstar CDi Compact ErP

Covers: Greenstar 28CDi Compact ErP

GC 47-406-77, 47-406-78

Setting the boiler to maximum output (Chimney sweep mode)

1. Press the eco and OK buttons together for at least 5 seconds.
2. The chimney sweep symbol will be displayed at the top of the screen and the word MAX will flash.
3. The boiler will ramp up to maximum output in approx. 30 to 35 seconds.

From manual 6 720 813 276, page 37.

CO₂ and CO from manual 6 720 813 276, page 9. Check against the data badge.

The gas valve is factory set and must not be adjusted during commissioning if found to be out of tolerance, please contact the Worcester, Bosch Group help line 0330 123 3366. (page 39)

Greenstar CDi Compact Installation Commissioning

Covers: Greenstar 32 CDi Compact, Greenstar 36 CDi Compact

GC 47-406-46, 47-406-47, 47-406-48, 47-406-49

Enter service mode / Force maximum rate

1. With the control panel in the operating position, press and hold the eco and buttons together for at least five seconds.
2. The chimney sweep symbol will be displayed at the top of the screen and the word Max will flash at the bottom of the screen.
3. The boiler will take approximately 30 to 35 seconds to ramp up to maximum output.
4. Allow the boiler to stabilise at maximum output.

From manual 6 720 803 800, page 33.

Force minimum rate

1. While in maximum rate service mode, press the down arrow button.
2. Min will flash at the bottom left of the screen.
3. The boiler will take 30 to 35 seconds to ramp down to minimum output.
4. Allow the boiler to stabilise at minimum output.

From manual 6 720 803 800, page 39.

CO₂ and CO from manual 6 720 803 800, page 39. Check against the data badge.

DO NOT ADJUST THE AIR/GAS RATIO VALVE. (page 33)

GREENSTAR CDi CONVENTIONAL WALL HUNG RSF GAS-FIRED CONDENSING REGULAR BOILER

Covers: Greenstar 40 CDi Conventional

GC 41-311-72, 41-311-74

Exiting Service/Boost Mode

1. Press the boost button (L) again and the boiler will return to normal operation.
2. If left in the central heating boost mode the control will return to normal operation after 15 minutes.

From manual 6 720 614 556a, page 34.

CO₂ and CO from manual 6 720 614 556a, page 48. Check against the data badge.

THE COMBUSTION FOR THE APPLIANCE IS FACTORY SET. NO ADJUSTMENT IS REQUIRED IF THE GAS INLET PRESSURE IS CORRECT. (page 34)

GREENSTAR CDi WALL HUNG RSF GAS-FIRED CONDENSING COMBINATION BOILER

Covers: Greenstar CDi 25 CDi

GC 47-311-92, 47-311-96

Forcing Maximum Rate (Central Heating Boost Mode)

1. Press and hold central heating boost button (L) for ten seconds and set Central Heating temperature to maximum.
2. The central heating boost button will illuminate continually.
3. To exit, press the central heating boost button again or wait for 15 minutes for the control to return to normal operation.

From manual 6 720 613 700a, page 36.

Forcing Minimum Rate

1. Set the central heating control to minimum. This will make the boiler go to minimum power.

From manual 6 720 613 700a, page 53.

CO₂ and CO from manual 6 720 613 700a, page 53. Check against the data badge.

THE COMBUSTION FOR THE APPLIANCE IS FACTORY SET. NO ADJUSTMENT IS REQUIRED IF THE GAS INLET PRESSURE IS CORRECT. (page 36)

GREENSTAR FS 30CDi & FS 42CDi Regular

Covers: Greenstar FS 30 CDi Regular, Greenstar FS 30 CDi Regular (2008-2015), Greenstar FS 42 CDi Regular

GC 41-406-03, 41-406-04, 41-406-05, 41-406-06

Enter Service Mode (Force Maximum Rate)

1. Press and hold down the boost button for 10 seconds.
2. Turn temperature control to maximum.
3. The boiler will then go to maximum output.

From manual 8 716 115 216b, page 42.

Force Minimum Rate

1. Turn the temperature control to minimum.
2. This will make the boiler go to minimum output.

From manual 8 716 115 216b, page 42.

Exit Service Mode / Return to Normal Operation

1. Hold down the boost button for two seconds, or wait 15 minutes for the control to automatically return to normal operation.
2. The boiler should return to normal operating mode with the blue power indicator permanently illuminated.

From manual 8 716 115 216b, page 42.

CO₂ and CO from manual 8 716 115 216b, page 44. Check against the data badge.

THE COMBUSTION FOR THE APPLIANCE IS FACTORY SET. NO ADJUSTMENT IS REQUIRED IF THE GAS INLET PRESSURE IS CORRECT. (page 30)

GREENSTAR HE combi / GREENSTAR HE plus combi / Service Booklet

Covers: Greenstar Zwbr 7-30 HE Plus, ZWB 7-25

GC 47-311-73, 47-311-75

Entering Service Mode / Selecting Service Functions

1. Press any button to activate the main menu.
2. Press Up or Down button until the arrow cursor is pointing to Settings.
3. Press the Next button.
4. Press Up or Down button until the arrow cursor is pointing to Service.
5. Press the Next button.
6. Press Next button to select Display service parameters. Service function 0.0, Last fault is displayed.
7. To set service functions: press and hold the Next button (for about 5 seconds) until the display shows Adjust service parameters and the first service function (e.g. 2.0 Operating mode).
8. Press Up or Down button until the desired service function is displayed.
9. Press the Next button, then use Up and Down buttons to enter the required setting.
10. Press Next button, select yes to store settings, and confirm.

From manual 6 720 610 576 / 6 720 610 597 / 7 181 465 347, page 33.

Forcing Maximum and Minimum Rate (Chimney Sweep Mode)

1. Press and hold the chimney sweep button until the display shows --.
2. Chimney sweep mode is active, switching the appliance to max. rated heat output or set heating output for 15 minutes.

From manual 6 720 610 576 / 6 720 610 597 / 7 181 465 347, page 36.

CO₂ and CO from manual 6 720 610 576 / 6 720 610 597 / 7 181 465 347, page 9. Check against the data badge.

The setting is factory sealed at maximum. Adjustment to the rated heat input and min. heat input is not necessary. (page 30)

GREENSTAR HIGHFLOW 440 INSTALLATION COMMISSIONING & SERVICING

Covers: Greenstar Highflow

GC 47-311-82, 47-311-83

Entering Service Function / Mode

1. Press and hold button (A) until the display (B) shows '— —'.
2. Turn the temperature control (C) to select the required function (e.g. '.0' to '4.9').

From manual 6-720-611-730b, page 34.

Forcing Maximum and Minimum Rate (Gas/Air Ratio Setting)

1. Press and hold button (B) until display (C) shows -- and button illuminates.
2. Turn temperature control (D) until display (C) shows 2.0.
3. Turn DHW temperature control (E) until display (C) shows 2 for max. rated heat output.
4. Turn temperature control (E) anti-clockwise until display (C) shows 1 for min. rated heat output.
5. Turn temperature control (E) anti-clockwise as far as the stop so display shows 0 for normal operating mode.
6. Press and hold button (B) until display (C) shows [ ] to exit.

From manual 6-720-611-730b, page 41.

CO₂ and CO from manual 6-720-611-730b, page 44. Check against the data badge.

The appliance is set at the factory and adjustment to the CO2 settings (gas/air ratio) is only required where the appliance has been stripped down and assembled or if the fan, burner or gas valve are replaced or the appliance has been converted to a different gas type. (page 34)

Greenstar Highflow 440CDi & 550CDi

Covers: Greenstar Highflow 440 CDi

GC 47-406-24, 47-406-26

Entering Service Mode / Forcing Maximum Rate

1. Press the central heating boost button for ten seconds and set temperature to maximum.
2. The boost button will illuminate continually.
3. If left in service mode, the control will return to normal operation after 15 minutes.
4. If pressure is satisfactory, press the boost button again and the boiler will return to normal operation.

From manual 8 716 115 219b, page 37.

Setting Minimum Rate

1. Turn the temperature control to minimum. This will make the boiler go to minimum output.

From manual 8 716 115 219b, page 46.

CO₂ and CO from manual 8 716 115 219b, page 48. Check against the data badge.

THE COMBUSTION FOR THE APPLIANCE IS FACTORY SET. NO ADJUSTMENT IS REQUIRED IF THE GAS INLET PRESSURE IS CORRECT. (page 35)

Greenstar Highflow 440CDi ErP & 550CDi ErP (manual 6 720 815 062)

Covers: 440CDi ErP,, 550CDi ErP,, Greenstar Highflow 440CDi ErP, Greenstar Highflow 550CDi ErP

GC 47-406-85, 47-406-86, 47-406-87, 47-406-88

Entering service mode / setting maximum rate

1. Press and HOLD central heating boost button for 10 seconds.
2. Set Central Heating temperature to maximum.
3. The central heating boost button will illuminate continually, indicating the boiler is operating in the heating boost/maximum mode.
4. To adjust CO2, remove plastic cap and use a flat bladed screwdriver on the max adjustment / adjuster.
5. To exit service mode, press the boost button for more than 1 second, or the control will automatically return to normal operation after 15 minutes.

From manual 6 720 815 062, page 40.

Setting minimum rate

1. Turn the temperature control to minimum after entering service/boost mode.
2. Measure the CO2 and adjust via the minimum adjustment on the gas valve if required.
3. Turn temperature control back to maximum output to recheck CO2 values before exiting.

From manual 6 720 815 062, page 40.

CO₂ and CO from manual 6 720 815 062, page 40. Check against the data badge.

The air/gas ratio valve is factory set and must not be adjusted during commissioning unless this action is recommended following contact with the Worcester, Bosch Group help line 0330 123 3366. (page 35)

Greenstar Highflow 440CDi ErP & 550CDi ErP (manual 6 720 818 077)

Covers: Highflow 440 CDi

GC 47-406-89, 47-406-90

Enter Service Mode / Force Maximum Rate

1. Press and HOLD the Service engineer button for 10 seconds and set Central Heating temperature to maximum.
2. The Service engineer button will illuminate continually.
3. Run water through the DHW circuit to ensure that the boiler will not cycle during Service mode.

From manual 6 720 818 077, page 32.

Force Minimum Rate

1. Turn the temperature control to minimum after entering service mode to make the boiler go to minimum output.

From manual 6 720 818 077, page 37.

CO₂ and CO from manual 6 720 818 077, page 37. Check against the data badge.

The air/gas ratio valve is factory set and must not be adjusted during commissioning unless this action is recommended following contact with the Worcester, Bosch Group help line 0330 123 3366. (page 30)

Greenstar i ErP

Covers: Greenstar 25i ErP, Greenstar 30i ErP

GC 47-406-60, 47-406-61, 47-406-62, 47-406-63

Enter Service Mode (Chimney Sweep Mode - Max/Min)

1. Press the button for at least 5 seconds. (symbol shown in the manual, see the page)
2. The service button will be lit continually and the chimney sweep symbol will be displayed at the top of the screen.
3. The word 'Max' will flash at the bottom of the screen, and the appliance will ramp up to maximum output.
4. To set the appliance to minimum power, press the DHW down arrow button so 'Min' appears at the bottom of the screen.

From manual 6 720 806 944, page 38.

Exit Service Mode

1. Press the reset or return button and the appliance will return to normal operation.
2. If left in the service mode the control will return to normal operation after 15 minutes.

From manual 6 720 806 944, page 39.

CO₂ and CO from manual 6 720 806 944, page 8. Check against the data badge.

The gas valve is factory set and must not be adjusted during commissioning if found to be out of tolerance, please contact Worcester, Bosch Group. (page 38)

Greenstar i System Compact ErP - Installation, Commissioning

Covers: Greenstar 27i System Compact ErP, Greenstar 30i System Compact ErP

GC 41-406-58, 41-406-59, 41-406-60, 41-406-61

Setting the boiler to maximum (Chimney sweep mode)

1. Press the eco and up/down buttons together (or eco and the buttons) for more than five seconds.
2. The display will show the chimney sweep symbol and the word MAX.
3. The boiler will ramp up to maximum output in approximately 30 to 35 seconds.

From manual 6 720 813 280, page 37.

Exiting service mode

1. Press the spanner/return button to return to normal operation.
2. The boiler will run for 15 minutes in service mode and return to normal if no other inputs are made.

From manual 6 720 813 280, page 37.

CO₂ and CO from manual 6 720 813 280, page 8. Check against the data badge.

The gas valve is factory set and must not be adjusted during commissioning if found to be out of tolerance, please contact the Worcester, Bosch Group help line 0330 123 3366. (page 39)

Greenstar i System ErP

Covers: Greenstar 12i System ErP, Greenstar 18i System ErP, Greenstar 21i System ErP, Greenstar 24i System ErP, Greenstar 9i System ErP

GC 41-406-21, 41-406-22, 41-406-23, 41-406-24, 41-406-27, 41-406-28, 41-406-29, 41-406-30, 41-406-31, 41-406-32

Entering service mode (Chimney sweep mode)

1. Press the service button for at least 5 seconds.
2. The service button will be lit continually and the chimney sweep symbol will be displayed at the top of the screen and the word 'Max' will flash at the bottom of the screen.
3. To set to minimum power, press the DHW down arrow button while in chimney sweep mode ('Min' appears at the bottom of the screen).
4. Press the reset or return button to return to normal operation.

From manual 6 720 806 945, page 40.

CO₂ and CO from manual 6 720 806 945, page 8, 9. Check against the data badge.

The gas valve is factory set and must not be adjusted during commissioning if found to be out of tolerance, please contact Worcester, Bosch Group. (page 40)

Greenstar i System Installation, Commissioning

Covers: Greenstar 12i System, Greenstar 15i System, Greenstar 18 i System, Greenstar 24i System

GC 41-311-67, 41-311-68, 41-311-69, 41-311-70, 41-311-84, 41-311-86

Enter Service Mode (Maximum Rate)

1. Press and hold the service button for more than 10 seconds.
2. Set the Central Heating temperature control to maximum.
3. The service button will illuminate continually and the blue power indicator will pulse five times.

From manual 6720644743a, page 40.

Force Minimum Rate

1. While in service mode, set the central heating temperature control to minimum.
2. The blue power indicator will pulse twice.

From manual 6720644743a, page 47.

Exit Service Mode

1. Press the service button again to return to normal operation.
2. The control will automatically return to normal operation after 15 minutes if no action is taken.

From manual 6720644743a, page 41.

CO₂ and CO from manual 6720644743a, page 47. Check against the data badge.

The combustion settings on this gas-fired boiler have been checked, adjusted and preset at the factory for operation on the gas type defined on the data plate. DO NOT ADJUST THE AIR/GAS RATIO VALVE. (page 40)

Greenstar Ri Compact ErP

Covers: Greenstar 27Ri Compact ErP, Greenstar 30Ri Compact ErP

GC 41-406-54, 41-406-55, 41-406-56, 41-406-57

Entering Service Mode

1. Undo the two screw catches securing the fascia.
2. Pull the catches down to release the control panel.
3. Pull the bottom of the control panel forward and lower it into the service position.
4. Release the two screws securing the Installer access cover and remove the cover.
5. Press the service button for more than five seconds and the boiler will go into service mode (the red LED will flash).
6. Turn the control knob to 'max.' or 'min.' for the desired output (five flash sequence for maximum output, two flash sequence for minimum output).
7. Press the service button again briefly to switch out of service mode and stop the LED flashing.

From manual 6 720 813 282, page 32.

Forcing Maximum and Minimum Rate

1. Access service mode by pressing the service button for more than five seconds until the red LED flashes.
2. Turn the control knob to 'max' for maximum rate (red LED gives a five flash sequence; ensure central heating control is turned to maximum to prevent modulation).
3. Turn the control knob to 'min' for minimum rate (red LED gives a two flash sequence).

From manual 6 720 813 282, page 32.

CO₂ and CO from manual 6 720 813 282, page 9. Check against the data badge.

The gas valve is factory set and must not be adjusted during commissioning if found to be out of tolerance, please contact the Worcester, Bosch Group help line 0330 123 3366. (page 34)

Greenstar Ri ErP

Covers: Greenstar 12Ri ErP, Greenstar 15Ri ErP+, Greenstar 18Ri ErP+, Greenstar 24Ri ErP+

GC 41-406-41, 41-406-42, 41-406-43, 41-406-44, 41-406-45, 41-406-46, 41-406-47, 41-406-48, 41-406-70, 41-406-71, 41-406-73, 41-406-76, 41-406-77, 41-406-79

Entering service mode and setting maximum / minimum rate

1. Remove the three screws retaining the control cover.
2. Remove the control cover.
3. Remove the plastic tool clipped inside the cover.
4. Insert the tool into the switch.
5. Using the tool set the mode switch to maximum output (MAX) or minimum output (MIN).
6. Ensure the boiler is powered up and there is a demand from the external controls.
7. The power indicator will flash and the boiler will stay in this mode for 15 minutes if no further change is made to the switch.
8. Return mode switch to normal (NORM) after checks.

From manual 6 720 813 283, page 34.

CO₂ and CO from manual 6 720 813 283, page 36. Check against the data badge.

The gas valve is factory set and must not be adjusted during commissioning if found to be out of tolerance, please contact the Worcester, Bosch Group help line 0330 123 3366. (page 31)

Greenstar Si Compact ErP Installation Commissioning

Covers: Greenstar 25Si Compact ErP, Greenstar 30Si Compact ErP

GC 47-406-73, 47-406-74, 47-406-75, 47-406-76

Selecting service menus

1. Close gas isolation valve.
2. At the inlet test point (1), slacken the screw for a maximum of half a turn and connect a manometer.
3. Open the gas isolation valve.
4. Measure the pressure with the boiler running at maximum.
5. Press the eco and spanner/tools button for at least five seconds and the boiler will ramp up to maximum output in approximately 30 to 35 seconds.
6. The display will show the chimney sweep symbol and the word MAX will flash.
7. Press the ok button to return to normal operation.

From manual 6 720 813 278, page 35.

CO₂ and CO from manual 6 720 813 278, page 10. Check against the data badge.

The gas valve is factory set and must not be adjusted during commissioning if found to be out of tolerance, please contact the Worcester, Bosch Group help line 0330 123 3366. (page 38)

Greenstar Si Compact Installation, Commissioning

Covers: Greenstar 25 Si Compact

GC 47-406-50, 47-406-51

Entering service mode (maximum output / chimney sweep mode)

1. With the control panel in the operating position, press and hold the eco and buttons together for at least five seconds.
2. The chimney sweep symbol will be displayed at the top of the screen and the word Max will flash at the bottom of the screen.
3. The boiler will ramp up to maximum output in approximately 30 to 35 seconds.
4. Press the ok button to return to normal operation (or it will automatically return after 15 minutes if no other inputs are made).

From manual 6 720 807 277, page 34.

CO₂ and CO from manual 6 720 807 277, page 41. Check against the data badge.

The combustion settings on this boiler have been checked, adjusted and preset at the factory for operation on the gas type defined on the data plate. DO NOT ADJUST THE AIR/GAS RATIO VALVE. (page 34)

Greenstar Wall Mounted Condensing Boiler for Central Heating and Mains Fed Domestic Hot Water

Covers: Bosch Greenstar ZWBR 7-25A

GC 47-311-44

Entering Service Mode / Adjusting Maximum Heating Output

1. Turn the heating temperature control knob to 'E'.
2. Press the 'chimney sweep' (setting button) and service buttons until ' = ' appears on the display.
3. Release the buttons and '9.6', or similar, appears for 5 seconds followed by '00'. The buttons light.
4. Turn the heating temperature control knob until '5.0' appears for 5 seconds followed by the heating output setting.
5. Turn the hot water temperature control knob clockwise until the required output level is reached.
6. Press and hold the 'chimney sweep' and service buttons until ' ' appears to store the reset heating output.
7. Return the temperature control knobs to the original settings.

From manual 6 720 610 096, page 18.

Disabling the Siphon Check Programme for Servicing

1. Set the CH temperature control to E.
2. Press the Setting and Service buttons and hold until '--' appears on the display.
3. After 5 seconds a figure will appear on the display followed by 0.0 and the flashing of the buttons.
4. Turn the CH temperature control until 8.5 appears followed, after 5 seconds, by 1.
5. To disable the siphon check programme turn the DHW temperature control until 0 appears in the display.
6. To enter the change press and hold both buttons until ' ' appears.
7. IMPORTANT: The siphon check programme must be reset after the service has been completed i.e enter 1 into the memory.

From manual 6 720 610 096, page 21.

CO₂ and CO from manual 6 720 610 096, page 4. Check against the data badge.

Highflow 4.5 OF

Covers: Highflow 4.5 OF

GC 41-311-41

Entering Service Mode / Adjusting DHW and Heating Gas Pressures

1. Allow the boiler to fire for at least 10 minutes before making any adjustments.
2. To adjust DHW (High) gas pressure: Turn the DHW thermostat to maximum and turn the HEATING thermostat OFF. Using a 10mm blade width screwdriver, turn screw 'A' clockwise to increase and counter-clockwise to decrease pressure.
3. To adjust Heating (Low) gas pressure: Turn the DHW thermostat to OFF and set the HEATING thermostat to maximum. Using a small screwdriver, turn screw 'B' clockwise to increase and counter-clockwise to decrease pressure.

From manual ZKLIT825, page 14.

The domestic hot water output is preset at 22.9 kW (78,000 Btu/h) and must not be adjusted. (page )

The central heating pump has been set at MAXIMUM and must not be adjusted. (page )

Highflow 400 Electronic RSF

Covers: Highflow 400 Electronic RSF

GC 47-311-61, 47-311-64

Entering Service Position / Commissioning Operations

1. Remove the cabinet front panel.
2. Raise the facia and control box into the Service Position.
3. Lower the expansion vessel into the Service Position and remove the inner casing cover.
4. To check maximum burner pressure, turn the hot water temperature control to MAX and set programmer (if fitted) to HW ON.
5. To check minimum burner pressure, pull-off one of the blue leads from the modulating control on the gas valve.

From manual 8 716 104 464e, page 30.

R 25 & 30 HE combi

Covers: Greenstar R 25 HE Combi, Greenstar R 30 HE Combi

GC 47-311-77, 47-311-78

Entering Service Level 1

1. Press and hold the button until the display shows – –.
2. The button will light up.

From manual 6 720 611 441, page 28.

Entering Service Level 2

1. Note the positions of the temperature controls radiator-icon and tap-icon. After completing the settings, return the temperature controls to their original positions.
2. To select a service function on Level 1: press and hold the service-wrench button until the display shows - -.
3. To select a service function on Level 2: press and hold the buttons service-wrench and chimney-sweep simultaneously until the display shows = =.
4. Then turn the radiator-icon temperature control to select the required function.

From manual 6 720 611 441, page 28.

Force Max & Min Rate (Chimney Sweep Mode)

1. Press and hold the button until the display shows – –.
2. Chimney sweep mode is now active, switching the appliance to max rated heat output or set heating output.

From manual 6 720 611 441, page 32.

CO₂ and CO from manual 6 720 611 441, page 9. Check against the data badge.

The operational CO2 level is set at the factory and no adjustment is necessary when installing a natural gas fired appliance. (page 23)

R 28 HE system

Covers: Greenstar R 28 HE System

GC 41-311-62

Entering Service Mode (Level 1)

1. To select a service function on Level 1: press and hold the button until the display shows – –.
2. Then turn the temperature control to select the required function.

From manual 6 720 611 443, page 28.

Entering Service Mode (Level 2)

1. To select a service function on Level 2: press and hold the buttons and simultaneously until the display shows = =.
2. Then turn the temperature control to select the required function.

From manual 6 720 611 443, page 28.

Chimney Sweep Mode (Max/Min Rate)

1. Press and hold button until the display shows – –.
2. Chimney sweep mode is now active, the button will light up and the display shows the CH flow temperature.

From manual 6 720 611 443, page 32.

CO₂ and CO from manual 6 720 611 443, page 9. Check against the data badge.

The operational CO2 level is set at the factory and no adjustment is necessary when installing a natural gas fired appliance. (page 24)

R29 & R40 HE conventional

Covers: Greenstar R 29 HE Conventional, Greenstar R 40 HE Conventional

GC 41-311-60, 41-311-61

Entering Service Level 1

1. Press and hold the button until the display shows – –.

From manual 6 720 611 445 GB, page 26.

Entering Service Level 2

1. To select a service function on Level 1: press and hold the service button until the display shows --.
2. To select a service function on Level 2: press and hold the service button and "Chimney sweep" button simultaneously until the display shows ==.
3. Then turn the temperature control for boiler flow to select the required function.

From manual 6 720 611 445 GB, page 26.

Entering Chimney Sweep Mode (Max/Min Rate)

1. Press and hold the button until the display shows – –.

From manual 6 720 611 445 GB, page 31.

CO₂ and CO from manual 6 720 611 445 GB, page 9. Check against the data badge.

The operational CO2 level is set at the factory and no adjustment is necessary when installing a natural gas fired appliance. (page 23)

Wall hung gas fired condensing boiler

Covers: GB162

GC 41-406-66, 41-406-67

Enter Service Mode

1. Open boiler door
2. Check for heating demand
3. Press and hold 'Chimney sweep' (d) button for > 2 and < 5 seconds for full load mode
4. Simultaneously press and hold 'Chimney sweep' (d) + 'Reset' (e) buttons for > 2 seconds for further settings

From manual 6720813171, page 34.

Service Mode Adjustment/Exit

1. In service mode, press and hold 'Chimney sweep' (c) to toggle between min/max load
2. Press 'Reset' (e) to navigate parameters
3. Press and hold 'Chimney sweep' (d) for > 2 seconds to deactivate

From manual 6720813171, page 34.

CO₂ and CO from manual 6720813171, page 61. Check against the data badge.

The appliance is factory-fitted with a concentric connection. The gas valve is a component within the burner cover assembly. Adjust gas/air-ratio only with part load based on the gas/air pressure differential. (page 41)

Worcester 2000 Gas-fired condensing combi appliance

Covers: 2000 GC2000iW 25 C NG, 2000 GC2000iW 30 C

GC 47-800-24, 47-800-25

Entering chimney sweep mode (maximum output)

1. A hot water outlet can be opened to prevent the appliance from shutting down due to high temperature during testing.
2. Press the ok button for at least 5 seconds.
3. The appliance enters chimney sweep mode and automatically enters maximum output.
4. The display shows the maximum percentage of the power 100% alternating with the flow temperature.
5. The appliance will ramp up to maximum output in approximately 30 to 35 seconds.

From manual 6 721 814 551, page 40.

Setting the appliance to minimum in chimney sweep mode

1. Press the ok button for at least 5 seconds.
2. The appliance enters chimney sweep mode and automatically enters maximum output.
3. Press the down-arrow button to set the appliance to minimum output.

From manual 6 721 814 551, page 40.

Exiting chimney sweep mode

1. Press the ok button and the appliance will return to normal operation.
2. If left in the chimney sweep mode the control will return to normal operation after 30 minutes.

From manual 6 721 814 551, page 40.

CO₂ and CO from manual 6 721 814 551, page 52, 74. Check against the data badge.

The air/gas ratio valve is factory set and must not be adjusted during commissioning unless this action is recommended following contact with the Worcester, Bosch Group help line 0330 123 3366. (page 42)

Worcester 533/535 Compact Installation, Commissioning

Covers: 533 Compact, 535 Compact

GC 47-406-58, 47-406-59

Enter service mode / Force maximum rate

1. Press and hold the eco and buttons together for at least five seconds.
2. The chimney sweep symbol will be displayed at the top of the screen and the word MAX will flash at the bottom.
3. The boiler will ramp up to maximum output in approximately 30 to 35 seconds.

From manual 6 720 811 290, page 35.

Force minimum rate

1. While in service mode (maximum output), press the down arrow button.
2. Min will flash at the bottom left of the screen.
3. The boiler will take 30 to 35 seconds to ramp down to minimum output.

From manual 6 720 811 290, page 42.

Exit service mode

1. Press the ok button to return to normal operation.
2. Alternatively, if left in the service mode, the control will return to normal operation after 15 minutes.

From manual 6 720 811 290, page 35.

CO₂ and CO from manual 6 720 811 290, page 42. Check against the data badge.

DO NOT ADJUST THE AIR/GAS RATIO VALVE. (page 35)

WORCESTER GREENSTAR 25CDi / 30CDi / 35CDi / 40CDi

Covers: Greenstar 35CDi, Greenstar CDi 35 CDi, Greenstar Cdi 40 Cdi

GC 47-311-94, 47-311-95, 47-311-98, 47-406-01

Entering Service Mode & Setting Maximum Rate for Commissioning / Combustion Testing

1. Press and hold the central heating boost button (L) for ten seconds until it illuminates continually.
2. Set the Central Heating temperature control to maximum.
3. The boiler will run at maximum output for up to 15 minutes.
4. To exit service mode early, press the central heating boost button again, or it will automatically return to normal operation after 15 minutes.

From manual 6 720 611 927b, page 36.

Setting Minimum Rate

1. Set the central heating control to minimum.
2. The boiler will go to minimum power.

From manual 6 720 611 927b, page 53.

CO₂ and CO from manual 6 720 611 927b, page 53. Check against the data badge.

THE COMBUSTION FOR THE APPLIANCE IS FACTORY SET. NO ADJUSTMENT IS REQUIRED IF THE GAS INLET PRESSURE IS CORRECT. (page 36)

WORCESTER GREENSTAR 25Si/30Si

Covers: Greenstar 25 Si, Greenstar 30si

GC 47-311-84, 47-311-85, 47-311-88, 47-311-89

Entering Service Mode and Forcing Max/Min Rate

1. Press and HOLD service button (F) for 10 seconds and set Central Heating temperature to maximum to run at maximum output.
2. The service button will illuminate continually and the blue power indicator will flash quickly.
3. To operate at minimum power, set the central heating control to minimum.
4. To exit service mode, press the service button again (or it will automatically return to normal operation after 15 minutes).

From manual 8 716 107 337b, page 34.

CO₂ and CO from manual 8 716 107 337b, page 53. Check against the data badge.

THE COMBUSTION FOR THE APPLIANCE IS FACTORY SET. NO ADJUSTMENT IS REQUIRED IF THE GAS INLET PRESSURE IS CORRECT. (page 34)