Service mode › Intergas

Intergas boiler service mode

How to put an Intergas boiler into service mode, so it holds maximum or minimum rate while you take combustion readings. 10 models from 5 Intergas installation and servicing manuals, each step with the page it came from.

Grouped by manual: one manual usually covers a range of outputs. The CO₂ figures are the manual's own. Set and check them with a calibrated analyser, never by eye.

Combi Compact HRE Installation, service and

Covers: Combi Compact HRE, Combi Compact HRE 28/24, Combi Compact HRE 36/30

GC 47-291-02, 47-291-03, 47-291-04

Test programs / Forcing min & max rate

Burner on at minimum power: press the wrench button and the - button simultaneously, display shows "L"
Burner on with maximum CH power setting: press the wrench button and the + button (1x) simultaneously, display shows "h"
Burner on with maximum DHW power: press the wrench button and the + button (2x) simultaneously, display shows "H"
Switch off test program: press the + button and the - button simultaneously

From manual 882877-15, page 12.

Entering service / parameter mode

Press the mode key (pencil-shaped icon) and the reset key (up-arrow icon) simultaneously until a 0 appears on the service- and main display.
Using the + and – keys set 15 (service code) on the main display.
Using the mode key (pencil-shaped icon) set the parameter to be set on the service display.
Using the + and – keys set the parameter to the desired value (visible) on the main display.
Once all desired changes have been entered, press the reset key (up-arrow icon) until a P appears on the service display.

From manual 882877-15, page 35.

Model	Gas	CO₂ max rate	CO₂ min rate	CO max
Combi Compact HRE	Natural gas	9.1% ± 0.5	8.6%	–
Combi Compact HRE	LPG	10.3% ± 0.5	9.3%	–
Combi Compact HRE 28/24	Natural gas	9.1%	8.6%	–
Combi Compact HRE 36/30	Natural gas	9.1%	–	–
Combi Compact HRE 36/30	LPG	10.3% ± 0.5	–	–

CO₂ and CO from manual 882877-15, page 39. Check against the data badge.

The combustion for this appliance has been checked, adjusted and preset at the factory for operation on the gas type defined on the appliance data plate. Do not adjust the air/gas ratio valve. (page 30)

Intergas Compact HRE SB Installation, service and

Covers: Combi Compact HRE SB

Entering Service Mode / Parameters

Press the spanner (service) key and the reset key (arrow over a bar) simultaneously until a 0 appears on the service- and temperature display.
Using the + and - keys set 15 (service code) on the temperature display.
Using the spanner (service) key select the parameter to be set on the service display.
Using the + and - keys set the parameter to the desired value (visible) on the temperature display.
Once all desired changes have been entered, press the reset key (arrow over a bar) until a P appears on the service display.

From the installation and servicing manual, page 39.

Test Programs (Force Max & Min Rate)

Burner on at minimum power: press the wrench symbol and the – button simultaneously -> Display reads 'L'
Burner on with maximum CH power setting: press the wrench symbol and the + button (1x) simultaneously -> Display reads 'h'
Burner on with maximum DHW power: press the wrench symbol and the + button (2x) simultaneously -> Display reads 'H'
Switch off test program: press the + button and the – button simultaneously -> Display reads actual situation

From the installation and servicing manual, page 14.

Gas	CO₂ max rate	CO₂ min rate	CO max
Natural gas	9.6%	8.6%	160 ppm
LPG	10.8%	9.8%	160 ppm

CO₂ and CO from the installation and servicing manual, page 46. Check against the data badge.

Rapid 25 / Rapid 32

Covers: Rapid 25, Rapid 32

GC 47-291-08, 47-291-09

Enter Service Mode / Parameter Setting

Set the appliance in the off mode using the On/Off key (- on the service display).
Simultaneously press the Service and Reset keys, until a 0 appears on the service and the temperature displays.
Using the '+' and '-' keys, set 15 (service code) on the temperature display.
Press the 'Service' key to confirm the code and enter the desired parameter.
Set using the 'Service' key the parameter to be set on the service display.
Set using the '+' and '-' keys the parameter to the required value on the temperature display.
After having entered all required changes, press the 'Reset' key until P appears on the service display.
Switch on the appliance again using the 'On/Off' key.

From the installation and servicing manual, page 46.

Force Max & Min Rate (Test Programs)

Burner on at minimum CH power: Press the wrench (service) and – buttons simultaneously to display 'L'.
Burner on with maximum CH power setting: Press the wrench (service) and + buttons simultaneously (1x) to display 'h'.
Burner on with maximum DHW power: Press the wrench (service) and + buttons simultaneously (2x) to display 'H'.
Switch off test program: Press the + and – buttons simultaneously to return to standard situation.

From the installation and servicing manual, page 17.

Gas	CO₂ max rate	CO₂ min rate	CO max
Natural gas	9.6% ± 0.1	8.6% ± 0.1	160 ppm
LPG	10.8% ± 0.1	9.8% ± 0.1	160 ppm

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

Xclusive

Covers: Xclusive

GC 47-291-14, 47-291-15

Service Mode (Test Programs)

Hold Service button and tap Minus button for minimum DHW capacity (L)
Hold Service button and tap Plus button once for set maximum CH output (h)
Hold Service button and tap Plus button twice for maximum capacity (H)
To terminate: tap Minus and Plus buttons simultaneously

From manual 84010402, page 47.

Gas	CO₂ max rate	CO₂ min rate	CO max
Natural gas	9.6%	8.6%	160 ppm
LPG	10.8%	9.8%	160 ppm

CO₂ and CO from manual 84010402, page 58. Check against the data badge.

This boiler has been factory set but adjustment may be required (page 14)

Xtreme

Covers: Xtreme 24, Xtreme 30, Xtreme 36

GC 47-291-10, 47-291-11, 47-291-12

Enter Service Menu / Test Programs

Touch the Service button from the menu and hold it for 2 seconds to enter the service menu.
To activate test program L (Burner on with minimum DHW capacity): hold the Service button and at the same time tap the Minus button.
To activate test program h (Burner on with set maximum central heating output): hold the Service button and at the same time tap the Plus button.
To activate test program H (Burner on with maximum capacity): hold the Service button and at the same time tap the Plus button 2x.
To terminate any test program, tap the Minus button and the Plus button at the same time.

From manual 84007407, page 47.

Gas	CO₂ max rate	CO₂ min rate	CO max
Natural gas	9.6%	8.6%	160 ppm
LPG	10.8%	9.8%	160 ppm

CO₂ and CO from manual 84007407, page 58, 62. Check against the data badge.

The gas/air control is set in the factory such that the combustion is optimal for the gas type used. Work on gas supply pipe components as well as the adjustment of the gas air control must be performed by an authorised installer. (page )

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Common questions

Is service mode the same as chimney sweep mode?

Yes, in practice. Makers use different names for the same function: service mode, chimney sweep mode, test mode, calibration mode, check programme. Each one holds the burner at a fixed rate, usually maximum then minimum, so you can take a stable combustion reading.

Can I adjust the gas valve while it's in service mode?

Only where the manual gives an adjustment procedure, and only with an analyser in the flue. Many current boilers are set at the factory and the manual says not to touch the gas valve. Where a manual says that, it is shown with the procedure above.

Other makers

Alpha Ariston Atag Baxi Biasi Chaffoteaux Ferroli Glow-worm Halstead Heatline Ideal Johnson Starley Keston Main Potterton Remeha Sime Vaillant Viessmann Vokera Worcester Bosch

Service mode and combustion checks are work for a competent, Gas Safe registered engineer. These procedures are taken from the manufacturers' manuals and inform your judgement; they don't replace it. Always work to the manual for the exact appliance, its data badge and the current standards.