Intergas Combi Compact HRE 36/30 Manual

Intergas Heating Ltd 1
Combi Compact
HRE 24/18 (G.C. 47-291-01)
HRE 28/24 (G.C. 47-291-02)
HRE 36/30 (G.C. 47-291-03)
Installation, service
and user instructions
Please read these installation instructions carefully before installing and using
the appliance. Keep these installation instructions with the appliance.
Always act in accordance with the instructions indicated.

Intergas Heating Ltd 2
BENCHMARK SCHEME
Benchmark places responsibilities on both manufacturers and installers. The purpose is to ensure that customers are provided with the correct
equipment for their needs, that it is installed, commissioned and serviced in accordance with the manufacturer’s instructions by competent
persons and that it meets the requirements of the appropriate Building Regulations. The Benchmark Checklist can be used to demonstrate
compliance with Building Regulations and should be provided to the customer for future reference. Please read the Benchmark Checklist
carefully, page 45, and complete all sections, as required by law, relevant to the appliance and installation. The details within the Checklist will be
required in the event of any warranty work. On completion the Checklist must be left with the end user. The relevant sections of the Service
Record, page 46, must be completed on each subsequent Service visit.
Installers are required to carry out installation, commissioning and servicing work in accordance with the Benchmark Code of Practice which is
available from the Heating and Hotwater Industry Council who manage and promote the scheme. Visit www.centralheating.co.uk for more
information.
CONTENT
1Preface 4
1.1 Regulation........................................................................................................................................................................................4
1.2 Warnings..........................................................................................................................................................................................4
1.3 Manual handling ..............................................................................................................................................................................4
1.4 Warnings on the box........................................................................................................................................................................4
1.5 Pictograms.......................................................................................................................................................................................4
1.6 Abbreviations and descriptions used...............................................................................................................................................5
1.7 This manual.....................................................................................................................................................................................5
1.8 Service and technical support..........................................................................................................................................................5
1.9 Product identification.......................................................................................................................................................................5
2Safety regulations 6
2.1 General............................................................................................................................................................................................6
2.2 The installation.................................................................................................................................................................................6
2.3 Approvals.........................................................................................................................................................................................7
2.4 Technical data .................................................................................................................................................................................7
2.5 Components....................................................................................................................................................................................8
3General boiler information 10
3.1 General..........................................................................................................................................................................................10
3.2 Boiler controller..............................................................................................................................................................................10
3.3 Parameter list.................................................................................................................................................................................10
3.4 Heat transfer..................................................................................................................................................................................10
3.5 Central heating system..................................................................................................................................................................10
3.6 Room temperature control.............................................................................................................................................................10
3.7 Integrated clock .............................................................................................................................................................................10
4Operation 11
4.1 General..........................................................................................................................................................................................11
4.2 Central heating mode ....................................................................................................................................................................11
4.3 Domestic hot water mode..............................................................................................................................................................11
4.4 Operating modes...........................................................................................................................................................................11
4.5 Clock function................................................................................................................................................................................13
4.6 PC interface...................................................................................................................................................................................13
4.7 Test programs................................................................................................................................................................................13
4.8 Frost protection.............................................................................................................................................................................14
5Installer handy hints 15
6Accessories 16
7Installation 17
7.1 Overall dimensions........................................................................................................................................................................18
7.2 Installation location........................................................................................................................................................................19
7.3 Assembly.......................................................................................................................................................................................20
7.4 Installing the appliance..................................................................................................................................................................21
8Connection 22
8.1 Connecting CH installation............................................................................................................................................................22

Intergas Heating Ltd 3
8.2 Connecting DHW installation.........................................................................................................................................................23
8.3 Electrical connection .....................................................................................................................................................................24
8.4 Gas connection .............................................................................................................................................................................25
8.5 Flue system...................................................................................................................................................................................26
9Commissioning the appliance 28
9.1 Filling and venting the appliance and the installation....................................................................................................................28
9.2 Commissioning the appliance .......................................................................................................................................................29
9.3 Setting and adjusting the clock functions......................................................................................................................................30
9.4 Additional functions.......................................................................................................................................................................30
9.5 Shutting down................................................................................................................................................................................31
10 Setting and adjustment 32
10.1 Directly via the operating panel.....................................................................................................................................................32
10.2 Setting via the service code ..........................................................................................................................................................33
10.3 Parameters....................................................................................................................................................................................33
10.4 Setting maximum CH power..........................................................................................................................................................34
10.5 Adjusting pump setting..................................................................................................................................................................34
10.6 Weather– compensation adjustment.............................................................................................................................................34
10.7 Conversion to different gas type....................................................................................................................................................35
10.8 Setting gas/air adjustment.............................................................................................................................................................36
11 Faults 37
11.1 Fault codes....................................................................................................................................................................................37
11.2 Other faults....................................................................................................................................................................................37
12 Maintenance 40
12.1 Disassembly..................................................................................................................................................................................40
12.2 Cleaning........................................................................................................................................................................................40
12.3 Assembly.......................................................................................................................................................................................41
13 Electrical diagram 42
13.1 NTC resistances............................................................................................................................................................................42
14 Short spares list 43
15 Warranty conditions 44
16 CE declaration 44
17 Gas Boiler System commissioning checklist 45
18 Service Record 46
© 2009 Intergas Heating Ltd. All rights reserved.
The information provided applies to the standard version of the product. Intergas Heating Ltd cannot therefore be held liable for any loss or damage arising from product
specifications deviating from the standard version. The available information has been compiled with all possible care, but Intergas Heating Ltd cannot be held liable for
any errors in the information or for the consequences thereof.
Intergas Heating Ltd cannot be held liable for any loss or damage arising from work performed by third parties.
Subject to change.

Intergas Heating Ltd 4
1 PREFACE
1.1 Regulation
The Intergas combination boiler meets the requirements of Statutory Instrument 'The Boiler
(Efficiency) Regulations' and is deemed to meet the requirements of:
• Gas Appliance Directive 90/396/EEC
• Boiler Efficiency Directive 92/42/EEC
• Low Voltage Directive 2006/95/EC and
• Electromagnetic Compatibility Directive 2004/108/EC
Intergas declares that the materials used in the manufacturing of this appliance are non-
hazardous and that no substances harmful to health are contained within the appliance.
1.2 Warnings
Intergas accepts no responsibility for the unsatisfactory performance of the appliance or flue
arising from the failure to comply with the installation and user instructions. Incorrect installation
could invalidate your guarantee and may lead to prosecution.
If the appliance is re-sold or installation transferred the appliance must be re-registered with
Intergas in order to maintain the warranty.
The boiler must be installed in accordance with these instructions and the regulations currently
in force. Read these instructions carefully before installing or using the appliance.
1.3 Manual handling
When moving the boiler always keep your back straight, bend your knees, don’t twist, move
your feet. Avoid bending forwards or sideways and keep the load as close to your body as
possible. Where possible transport the boiler using a suitable trolley, sack truck or get some
assistance. Grip the boiler firmly and before lifting establish where the weight is concentrated to
determine the centre of gravity, repositioning yourself if necessary.
1.4 Warnings on the box
This is a fragile piece of equipment: Please provide a dry
storage for the appliance.
This is a fragile piece of equipment: Please be very careful
not to drop.
Store the appliance upright as indicated on the box.
Stack no more boxes than three high.
1.5 Pictograms
The following pictograms are used in this manual:
CAUTION
Procedures which – if they are not performed with the
necessary caution – can result in damage to the product, the
surrounding area or the environment, or in physical injury.
WARNING HIGH VOLTAGE
Risk of electrical shock.
FROST PROTECTION
Procedures which must be followed to prevent frost
damage.

Intergas Heating Ltd 5
1.6 Abbreviations and descriptions used
Description Referred to as
High efficiency HE
Intergas Combi Compact HRE wall mounted gas fired
boiler Appliance
Appliance plus pipe work for central heating CH installation
Appliance plus pipe work for domestic hot water DHW installation
1.7 This manual
This manual will enable you to assemble, install and maintain the appliance safely.
Follow the instructions carefully. In case of doubt contact the manufacturer. Keep these
installation instructions with the appliance.
1.8 Service and technical support
For information about specific adjustments, installation, maintenance and repair work,
please contact:
Intergas Heating Ltd
Unit 6, West Court
Buntsford Park Road
Bromsgrove
Worcestershire
B60 3DX
Tel. [phone]
Fax. [phone]
[email protected]
www.intergasheating.co.uk
1.9 Product identification
You will find the appliance data on the data plate on the underside of the appliance.
A. Model
B. G.C. registration number
C. Heat input (net) [kW]
D. Heat output CH [kW]
E. Appliance category
F. Gas type
G. Gas supply pressure [mbar]
H. NOx class
I. Appliance type
J. Maximum CH pressure [bar]
K. Maximum DHW pressure [bar]
L. Maximum Flow temperature [°C]
M. Electrical supply
N. Protection
O. PIN
P. Serial number
Q. Production year

Intergas Heating Ltd 6
2 SAFETY REGULATIONS
The manufacturer Intergas Heating Ltd accepts no liability whatsoever for damage or injury caused
by failure to adhere (strictly) to the safety regulations and instructions, or carelessness during
installation of the Intergas Combi Compact HRE High Efficiency wall mounted gas fired boiler and
any associated accessories.
2.1 General
It is law that all gas appliances are installed by a competent person, ie Gas Safe registered and in
accordance with the following recommendations:
• Current Gas Safety (Installation and Use) Regulations
• All current building regulations
• Building Standards (Scotland) Consolidated
• This appliance must be installed in accordance with the Gas (Safety and Use) Regulations,
current Building Regulations, Building Standards (Scotland), I.S.813 Installation of Gas
Appliances (Ireland), IEE Wiring Regulations (BS 7671), Health and Safety Document No. 635
(Electricity at Work Regulations) and Local Water Authority Bye Laws
• UK Water Regulations and Bye Laws
• Health & Safety
2.2 The Installation
The installation must comply with the following British Standards codes of practice:
• BS 5440: Flues and Ventilation for gas appliances of rated input not exceeding 70kW (Part 1
Flues)
• BS 5440: Flues and Ventilation for gas appliances of rated input not exceeding 70kW (Part 2 Air
Supply)
• BS 5546: 2000 Installation of gas hot water supplies for domestic purposes.
• BS 5549: 1990 Forced circulation hot water systems
• BS 6700: 1997 Design, Installation, testing and maintenance of services supplying hot water
• BS 6798: 2000 Specification for installation of gas fired hot water boilers of rated input not
exceeding 70kW
• BS 6891: 1998 Installation of low pressure gas pipe-work installations up to 35mm (RI)
• BS 7593: 1992 Code of practice for treatment of water in heating systems
• BS 7671: 2001 Requirements for electrical installations, IEE Wiring regulations
Reference should also be made to:
• Guide to condensing boiler installation assessment procedures for dwellings
• The institute of Gas Engineers document IGE/UP/7 for timber frame dwellings

Intergas Heating Ltd 7
2.3 Approvals
Natural Gas
Intergas Combi Compact HRE Pre-mix Condensing Combination Boiler
British Gas Service Listing:
Combi Compact HRE 36/30 G.C.N. 47-291-03
Combi Compact HRE 28/24 G.C.N. 47-291-02
Combi Compact HRE 24/18 G.C.N. 47-291-01
Notified /Body
The Intergas Combi Compact HRE range of central heating boilers are manufactured from
high quality materials and designed for reliability and optimum performance.
Intergas is committed to the continual development of their appliances and reserves the right
to make changes without notification to ensure their customers benefit from the latest
advances in combustion technology and energy conservation.
Gastec 0063PT3576 Directive 90/396/EEC
Directive 92/42/EEC

Intergas Heating Ltd 8
2.4 Technical data
Appliance category C13; C33; C43; C53; C63; C83
Gas supply pressure 20 mbar -G20 ; 37 mbar – G31
Gas Category II2H3P
Technical data Combi Compact HRE 24/18 28/24 36/30
SEDBUK Rating A A A
Gas Council number G.C. 47-291-01 G.C. 47-291-02 G.C. 47-291-03
DHW
Input kW 5.6 – 22.1 7.1 – 28.0 7.6 – 32.7
DHW threshold l/min 2 2 2
DHW Flow Rate at 40°C l/min 10 12.5 15
DHW Flow Rate at 60°C l/min 6 7.5 9
∆T 25 °C l/min 12 15 18
∆T 35 °C l/min 9 11 13
DHW temperature (factory setting) °C 55 55 55
Max. DHW water pressure bar 8 8 8
DHW side pressure loss KPa See § 8.2.2 See § 8.2.2 See § 8.2.2
CH
Nom. Input rating (lower value)* kW 5.6 – 18.7 7.1 – 23.7 7.6 – 27.0
Rated power* kW 6.1 – 18.2 7.7 – 23.1 8.2 – 26.6
Max. CH water pressure bar 3 3 3
Max. CH water temperature °C 90 90 90
Other data
Gas consumption (G20) m3/h 0.58 – 2.29 0.75 – 2.91 0.79 – 3.39
Gas consumption (G31) m3/h 0.22 – 0.87 0.28 – 1.11 0.30 – 1.29
Appliance pressure loss (CH) mWk See § 10.5 See § 10.5 See § 10.5
NOx class natural gas 5 5 5
NOx class LPG 5 4 5
Electrical data
Mains power V 230 230 230
Safety class IP IP20 IP20 IP20
Power consumption : full load W 130 130 130
Power consumption: partial load W 40 40 40
Power consumption: standby W 2 2 2
Boiler dimensions and weight
Height mm 590 650 710
Width mm 450 450 450
Depth mm 240 240 240
Weight kg 30 33 36
(*) The maximum CH power is factory set at 70% of the highest value (See section §10.4, Setting maximum CH power).
Rated power CH measured under SEDBUK conditions.
We have a policy for continual improvement and development, therefore we reserve the right to change specifications without prior notice.

Intergas Heating Ltd 9
2.5 Components
A. CH pump L. Air supply cap
B. Gas valve M. Flue pipe adapter
C. Boiler controller N. Connection block / terminal strip X4
D. Sensor S1 O. Condensate drain pan
E. Sensor S2 P. Hot water sensor S3
F. Fan Q. Condensate trap
G. Flow switch R. Heat exchanger
H. CH pressure sensor S. Operating panel and read-out
I. Mains lead 230 V AC without plug (stripped) T. Ionisation / Ignition electrode
J. Manual air bleed U. Position of data plate
K. Sight glass

Intergas Heating Ltd 10
3 GENERAL BOILER INFORMATION
3.1 General
The Intergas Combi Compact HRE wall mounted, gas fired boiler is a closed appliance.
The appliance is designed to deliver heat to the water in a CH system and the DHW
installation.
The air supply and combustion gas flue connection is as standard prepared for a
concentric 60/100 horizontal flue system. The appliance can be connected to a wall
mounting frame and expansion vessel. The appliance can also be connected without
the wall mounting frame using the robo kit.
The Intergas Combi Compact HRE wall mounted gas fired boiler carries the CE rating
and IP20 electrical protection.
The HRE 36/30 is suitable for supplying at least 13 litres of water per minute at 35°C
temperature arise. The HRE 28/24 is suitable for supplying at least 11.5 litres of water
per minute and the HRE 24/18 is suitable for supplying at least 8.5 litres of water per
minute.
It is possible to use the appliance solely for hot water or solely for heating. The unused
system does not have to be connected. The parameters have to be set
correspondingly.
The appliance is supplied as standard for natural gas (G20). For usage of propane gas
(G31) the boiler can be modifed by changing the gas injector. A gas conversion kit can
be ordered at Intergas Heating Ltd.
Note
Modification of the boiler can only be done by a qualified competent person.
3.2 Boiler controller
An electronic control unit, consisting of a boiler controller and separate ignition module
which is placed on the gas valve,provides direct burner ignition and flame supervision
along with continuous modulation of the burner’s gas supply.
3.3 Parameter list
All boiler adjustments are easily accessible by the parameter list in the software.
3.4 Heat transfer
Heat transfer to the boiler’s heating and DHW circuit is obtained via a primary, gas to
water heat exchanger within a hermetically sealed combustion chamber. A modulated
speed fan blows the gas/air mixture into the combustion chamber and expels the
products of combustion to outside air via an associated flue system.
3.5 Central heating system
An integral pump located in the boilers hydraulic circuit circulates water through the
heat exchanger to the central heating circuit. During DHW demand the pump stops
functioning, so all the heat is directly transferred to the integrated DHW circuit and no
transfer losses occur. In the event of reduced or interrupted water circulation in the
central heating circuit, an automatic system by-pass should be fitted as far away from
the boiler as possible.
Note
It is no longer permissible to utilize a non-thermostatic controlled radiator as a by-pass.
3.6 Room temperature control
Room temperature can be controlled by the use of an external room thermostat and
thermostatic radiator valves.
Note
Connection of the room thermostat is dependant on the operating voltage of the
thermostat.
3.7 Integrated clock
The boiler incorporates an integrated clock, which allows the setting of central heating
periods (See the User Instructions, ‘Operation and display read-out’ for details) and the
boiler’s control panel incorporates an LED display, which indicates the state of
operation and fault defect codes.

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4 OPERATION
4.1 General
The Intergas Combi Compact HRE wall mounted, gas fired boiler is a modulating high
efficiency boiler. This means that the power is adjusted in line with the desired heat
requirement. The aluminium heat exchanger comprises of two separate copper circuits.
As a result of the separately constructed circuits for CH and DHW the heating and hot water
supply can operate independently of each other. The hot water supply takes priority over the
heating. The two systems cannot operate simultaneously.
The appliance is equipped with an electronic boiler controller which, each time heat is
requested from the heating or the hot water supply, starts the fan, opens the gas valve,
ignites the burner and continuously monitors and controls the flame, depending on the
requested output.
By setting a parameter the boiler can be set to operate either on domestic hot water only,
heating only or DHW and heating.
It is possible to use the boiler’s DHW circuit without needing to connect and fill the central
heating system.
Note
Domestic hot water demand draws preference over heating. During heating periods the
boiler will automatically revert back to heating mode, after a draw off of hot water.
4.2 Central heating mode
When a heating demand is requested (power is on, the timer and thermostat are calling for
heat) the integral pump is energised and the boiler will fire automatically. The hot water is
now circulated around the central heating system. When the end of the central heating
demand is reached (the thermostat reaches temperature or the time clock reaches the end
of its set period) the burner will shut down while the pump remains functioning during a
presetted period of time to dissipate any excess heat from within the boiler’s heat-
exchanger. After that the boiler will revert to stand-by, waiting to respond to the next heating
or hot water demand.
During the heating period a call for hot water will take preference over heating.
4.3 Domestic hot water mode
When there is a request for hot water (flow switch closes) the boiler will fire automatically.
When on this moment a heating demand was answered the pump will immediately stop so
all the heat can be used to heat up the DHW.
When the request for hot water is ended and the request for heating is still present it is
possible to create a delay (1 – 15 minuts) in answering this request by adjusting the
parameter [o] (See § 10.3).
4.4 Operating modes
A code on the service display of the operating panel indicates the appliance’s operating
mode.
- Off
The appliance is out of operation but is supplied with electrical power. No response occurs
to calls for DHW or CH. The appliance frost protection is active. This means that the pump
operates and the exchanger is heated up if the temperature of the water present in it falls
too far.
If the frost protection is actuated, code 7 is displayed (heating the exchanger).
In this operating mode the pressure in the CH installation (in Bar) can also be read on the
temperature display.
Waiting mode
The LED at the button is lit and possibly one of the LEDs for the DHW comfort function.
The appliance is ready to respond to a request for CH of DHW.

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0 Pump overrun of CH
After the end of CH operation the pump continues to run. The running time is factory set at the
value in accordance with § 10.3. This setting can be changed.
In addition, the pump runs automatically for 10 seconds once every 24 hours in order to prevent
seizing. This automatic switching on of the pump occurs at the time of the last call for heat. To
change the time, the room thermostat setting should be increased briefly at the desired time.
1 Boiler shutdown when required temperature reached
The boiler controller can temporarily shut down the request for heat. The burner is then
stopped. Shutdown occurs because the requested temperature has been reached.
When the temperature has fallen sufficiently and the anti cycle time has passed the
shutdown is cancelled.
2 Self-test
The connected sensors are checked regularly by the boiler controller. During the check
the boiler controller does not perform any other tasks.
3 Ventilation
When the appliance is started the fan is first brought to starting speed. When the
starting speed has been reached the burner is lit. Code 3 is also visible when post-
ventilation is taking place after the burner has stopped.
4 Ignition
When the fan has reached the starting speed, the burner is ignited by means of
electrical sparks. During ignition the code 4 is visible. If the burner does not ignite, a
new ignition attempt occurs after approximately 15 seconds. If after 4 ignition attempts
the burner is not yet burning, the boiler controller goes into fault mode (See § 11.2).
5 CH operation
An on/off thermostat, an OpenTherm thermostat, an external sensor or a combination of
the latter can be connected to the boiler controller.
When a request for heat is received from a thermostat, the fan is started (code 3 ),
followed by ignition (code 4 ) and CH operating mode (code 5 ).
During CH operation the fan speed and hence the appliance power are controlled by
the boiler controller so that the CH water temperature reaches the desired CH supply
temperature.
If an on/off thermostat is connected, this is the CH supply temperature set on the
display. In the case of an OpenTherm thermostat the desired CH supply temperature is
determined by the thermostat. In the case of an external sensor the desired CH suppply
temperature is determined by the heating line programmed in the boiler controller. For
the latter two, however, the maximum is the temperature set on the display.
During CH operation the requested CH supply temperature is indicated on the operating
panel.
The CH supply temperature can be set between 30°C and 90°C.
When the DHW comfort function is switched on (See code 7 ) any OpenTherm request
for heat of less than the value of par. E is ignored.
6 DHW operation
The hot water supply takes priority over the heating. If the flow switch detects a need for
more than 2 l/min of DHW, any demand for CH will be interrupted. After the fan has
reached speed code 3 and ignition has taken place code 4 the boiler controller goes
to DHW mode code 6 .
During DHW operation the fan speed, and hence the power of the appliance, are
controlled by the boiler controller so that the DHW water temperature reaches the DHW
temperature setting.
The water temperature can be set between 40°C and 65°C (See § 10.1.6) and is
displayed on the operating panel during DHW operation.

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7 Pre-heating facility
To enable fast delivery of domestic hot water the boiler controller is equipped with a
DHW comfort function. This function maintains the temperature of the heat exchanger
to a pre defined temperature. The DHW comfort function has the following settings:
• On: ( LED on) The appliance’s DHW comfort function is switched on continuously.
In this mode the heat exchanger will bekept on temperature to assure instant
delivery of DHW.
• Eco: ( LED on) The appliance’s DHW comfort function is self learning. The
appliance will adapt to the patttern of use of the hot water tap. As a result, the
temperature of the heat exchanger will not be maintained during the night or in case
of lengthy absence.
• Off: (Both LEDs off) The temperature of the heat exchanger is not maintained, as a
result of which the delivery of hot tapwatertakes a little time. If there is no need for
fast delivery of hot tapwater, the DHW comfort function can be switched off.
4.5 Clock function
The boiler is equipped with a digital clock and offers the possibility to program 4 points in time
to switch from CH off or CH on.
During the “clock active” periods the boiler will respond on CH demands from the room
thermostat. During the “clock inactive” periods the boiler will not respond on CH demands.
Additionally the following special modes can be chosen:
1. t-on (temporary on).
The boiler will respond to every CH demand from the room thermostat until the next switch moment.
2. c-on (continuous on).
The boiler will respond to every CH demand from the room thermostat without any time limit.
3. OFF.
The boiler will not respond to any CH demand from the room thermostat.
Note
For setting and adjusting the clock see § 9.3 Setting and adjusting the clock functions.
4.6 PC interface
The boiler controller is equipped with an interface for a PC, which can be connected by
means of a special cable and associated Intergas Diagnostic Software (IDS). This
facility allows the behaviour of the boiler controller, the appliance and the heating
installation to be monitored over a longer period.
4.7 Test programs
The boiler controller has a facility for placing the appliance in test mode. Activation of a
test program will result in the appliance starting operation at a fixed fan speed, without
the control functions being actuated. The safety functions do remain active. The test
program is ended by pressing the and simultaneously or will end automaticaly
after 10 minutes.
Test programs
Program description Button
combinations Display reading
Burner on at minimum power and “L”
Burner on with maximum CH power
setting (See § 11.3, parameter 3) and (1x) “h”
Burner on with maximum DHW power
(See§ 11.3, parameter 4) and (2x) "H"
Switch off test program and Actual situation

Intergas Heating Ltd 14
4.8 Frost protection
FROST PROTECTION
To prevent freezing the appliance is equipped with an internal frost
protection. If the heat exchanger temperature falls too low, the burner
switches on and the pump runs until the heat exchanger temperature
is sufficient. When the appliance frost protection is activated the
symbol code 7 is displayed (pre heating the heat exchanger).
If the installation (or a part of it) is in danger of freezing, an (external)
frost thermostat must be fitted to the return line at the coldest location.
This must be connected in accordance with the wiring diagram (See
§ 8.3).
Note
If the appliance is out of operation ( - onthe service display) the appliances internal frost
protection is still active. However, this means there will be no response to a request for heat
from an (external) frost thermostat.

Intergas Heating Ltd 15
5 INSTALLER HANDY HINTS
• The installer shall instruct the user on the operation of the boiler, safety devices
contained within the boiler and on the location of the filling loop and how to re-pressurise
the system if the water pressure falls. The installer should then hand over the
instructions indicating the included Benchmark Commissioning Checklist that has been
completed.
• The user should be instructed to keep the instructions in a safe place for servicing and
future reference.
• It is important to keep the boiler clear of dust during the installation. In particular, do not
allow debris to enter the flue connection at the top.
• Before fitting the boiler ensure that the pipe work that you are installing is connected to
the appropriate connections on the boiler.
• It is important to thoroughly flush the water circuits, after isolating the boiler, in order to
remove any fluxes and debris from them. This should bedone particularly where boilers
are being fitted to existing radiator circuits (Refer to BS 7593:2006 for the details to
clean DHW and Central heating system).
• This boiler has been factory set but adjustment may be required to the heating input in
order to match the individual heating demand. This can be done by changing parameter
3 (= max. power CH) or parameter 4 (= max. power domestic water).
• Please do not use the pressure relief valve as a means of flushing the system.
• Remember that after hot water draw of there is a possible delay before the heating will
fire up.
• When commissioning the boiler check the gas inlet pressure is 20mbar (NG) or 37mbar
for Propane.
• Make sure that your instruments are calibrated regularly.
• Note: an anti-cycle delay time can be set up to a maximum of 15 minutes by adjusting
parameter Pas described in § 10.3.
• If you experience any problems please refer to the installation and commissioning
guidelines within the boiler instruction manual. If necessary, please contact Intergas
Heating Ltd (See § 1.8).
Remember it is a requirement to complete the Benchmark code of practice logbook before
leaving the installation. You are also required to register the boiler through the Gas Safe
registration scheme.

Intergas Heating Ltd 16
6 ACCESSORIES
Description Article number
Pipe cover set (incl. mounting material) 093217
Wall mounting frame + exp. vessel 8 litres HRE 36/30 093207
Wall mounting frame + exp. vessel 8 litres HRE 28/24 093197
Wall mounting frame + exp. vessel 8 litres HRE 24/18 093187
Outside sensor 203207
Concentric connection Ø80x125
• Concentric flue adapter
• Sealing cap
090557
Bend 45° 084661
Bend 90° 084660
Deflector kit 082976
Weather slate (steep roof) 087910
Weather slate (flat roof) 087372
Extension L = 100 incl. wall bracket 082975
Horizontal offset wall terminal 082970
Horizontal telescopic offset wall terminal 081280
Horizontal telescopic wall terminal 081281

Intergas Heating Ltd 17
Description Article number
Vertical roof terminal 086842
Plume management kit
082974
Elbow 90° (for plume management kit) 081284
Elbow 60° (for plume management kit)
081285
Extension L = 100 incl. wall bracket (for plume management kit) 081286
Robo kit
090000

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7 INSTALLATION
7.1 Overall dimensions
Appliance with connections downwards:
Appliance + mounting bracket + frame
A = Supply CH Ø22
B = Return CH Ø22
C = Gas ½”
D = Cold tap water Ø15
E = DHW Ø15
F = Condensate drain Ø25 (flexible)
G = Drain PRV Ø15
H = 840 Combi Compact HRE 36/30
H = 780 Combi Compact HRE 28/24
H = 720 Combi Compact HRE 24/18
Z = Flue pipe / air
supply Ø60/100 (concentric)

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7.2 Installation location
• If the boiler is to be installed in any room or compartment, it does not require any
purpose made ventilation for combustion air. If sited in a room containing a bath or
shower then particular reference is drawn to the current I.E.E. Wiring Regulations,
local Building Regulations or any other local regulations currently in service.
• The boiler is not suitable for external installation unless protected by a purpose
made building such as a boiler house.
• The following clearances are recommended for installation purposes:200mm
above, 300mm below and 10mm at each side. 500mm is required at the front but
this may be realized by opening a cupboard door.
• Flammable fluids and materials must be stored at least 1m away from the boiler
wall on which the boiler is mounted and must be sufficiently strong to support the
weight of the boiler.
7.2.1 Installing in a kitchen cupboard
The appliance can be installed between two kitchen cabinets or in a cabinet. Ensure
sufficient ventilation at top and bottom. When installed in a cabinet, ventilation
openings of at least 50 cm2must be created at the top and bottom of the appliance to
ensure free flow of air.
7.2.2 Removing cover plate and front panel
For various work on the appliance the cover plate and front panel should be removed
from the appliance. Proceed as follows:
• If cover plate (A), is used, remove to the front.
• Unscrew the two screws (1) behind the appliance display window.
• Pull the bottom of the front panel (2) forwards.

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7.3 Assembly
The boiler must be mounted on a wall mounting frame with an expansion vessel.
The jig can be placed in the sleeves of the frame and does not need any extra
assembly. The appliance can also be connected without the wall mounting frame using
the robo kit.
7.3.1 Fit the top connection frame and mounting bracket
• Using the fastening materials supplied, secure the frame vertically to the wall.
Make sure the wall is suitable for placing the boiler.
• Secure the jig with the shut-off valves in the frame by inserting it with the flanged
side upwards through the openings in the frame and securing it with two screws and
nuts.
Note
The appliance is wider than the frame.
• Install the CH heatingsystem and the DHW system to the valves.
CAUTION
Make sure that the boiler connections of the shut off valves
remain in the correct position (= straight upwards). Do not
over tighten connections. Do not turn tightened valves on
pipes as this weakens joints within the boiler.
H = 840 Combi Compact HRE 36/30
H = 780 Combi Compact HRE 28/24
H = 720 Combi Compact HRE 24/18