Intergas Compact HRE 18 OV Manual

Intergas Heating Ltd 1
Compact HRE
18 OV (G.C. 41-291-04)
24 OV (G.C. 41-291-05)
30 OV (G.C. 41-291-06)
Installat on, serv ce
and user nstruct ons
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 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. lease 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 ractice 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
1 Preface 4
1.1 Regulation ........................................................................................................................................................................................ 4
1.2 Warnings .......................................................................................................................................................................................... 4
1.3 Manual handling .............................................................................................................................................................................. 4
1.4 Warnings on the bo ........................................................................................................................................................................ 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
2 Safety regulations 6
2.1 General ............................................................................................................................................................................................ 6
2.2 The installation................................................................................................................................................................................. 6
2.3 Approvals ......................................................................................................................................................................................... 6
2.4 Technical data ................................................................................................................................................................................. 7
2.5 Components .................................................................................................................................................................................... 8
3 General boiler information 9
3.1 General ............................................................................................................................................................................................ 9
3.2 Boiler controller ................................................................................................................................................................................ 9
3.3 Parameter list................................................................................................................................................................................... 9
3.4 Heat transfer .................................................................................................................................................................................... 9
3.5 Central heating system .................................................................................................................................................................... 9
3.6 Room temperature control ............................................................................................................................................................... 9
3.7 Integrated clock ............................................................................................................................................................................... 9
4 Oeration 1
4.1 General .......................................................................................................................................................................................... 10
4.2 Central heating mode .................................................................................................................................................................... 10
4.3 Operating modes ........................................................................................................................................................................... 10
4.4 Clock function ................................................................................................................................................................................ 11
4.5 PC interface ................................................................................................................................................................................... 11
4.6 Test programs................................................................................................................................................................................ 12
4.7 Frost protection ............................................................................................................................................................................. 12
5 Installer important points 13
6 Accessories 14
7 Installation 16
7.1 Overall dimensions ........................................................................................................................................................................ 16
7.2 Installation location ........................................................................................................................................................................ 17
7.3 Installing the appliance .................................................................................................................................................................. 18
8 Connection 19
8.1 Connecting CH installation ............................................................................................................................................................ 19
8.2 Gas connection .............................................................................................................................................................................. 19
8.3 Electrical connection ...................................................................................................................................................................... 20
8.4 Condensate disposal ..................................................................................................................................................................... 22
8.5 Flue system ................................................................................................................................................................................... 23

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9 Commissioning the appliance 26
9.1 Filling and venting the appliance and the installation .................................................................................................................... 26
9.2 Commissioning the appliance ....................................................................................................................................................... 27
9.3 Setting and adjusting the clock functions ...................................................................................................................................... 28
9.4 Additional functions ....................................................................................................................................................................... 28
9.5 Shutting down ................................................................................................................................................................................ 29
1 Setting and adjustment 3
10.1 Directly via the operating panel ..................................................................................................................................................... 30
10.2 Setting via the service code .......................................................................................................................................................... 31
10.3 Parameters .................................................................................................................................................................................... 31
10.4 Setting ma imum CH power .......................................................................................................................................................... 32
10.5 Adjusting pump setting .................................................................................................................................................................. 32
10.6 Weather– compensation adjustment ............................................................................................................................................. 32
10.7 Checking gas-/air ratio .................................................................................................................................................................. 33
10.8 Setting gas/air adjustment procedure............................................................................................................................................ 34
E amples : .................................................................................................................................................................................................. 35
10.9 Conversion to different gas type.................................................................................................................................................... 35
11 Faults 36
11.1 Fault codes .................................................................................................................................................................................... 36
11.2 Other faults ................................................................................................................................................................................... 36
12 Maintenance 39
12.1 Disassembly .................................................................................................................................................................................. 39
12.2 Cleaning ........................................................................................................................................................................................ 39
12.3 Assembly ....................................................................................................................................................................................... 40
12.4 Combustion ................................................................................................................................................................................... 40
13 Electrical diagram 41
13.1 NTC resistances ............................................................................................................................................................................ 41
13.2 Typical Y Plan connection ............................................................................................................................................................. 42
13.3 Typical S Plan connection ............................................................................................................................................................. 42
14 Short spares List 44
15 Warranty Conditions 44
16 CE Declaration 44
17 Gas Boiler System Commissioning Checklist 45
18 Service Record 46
© 2014 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
1PREFACE
1.1 Regulation
The Intergas 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.
No more than three boxes should be stacked on top of each
other.
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.

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1.6 Abbreviations and descriptions used
Description Referred to as
High efficiency HE
Intergas Compact HRE OV 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
Building 94, Bay 1 Vantage Point
The Pensnett Estate
Kingswinford
West Midlands
DY6 7FS
Tel: [phone]
Fa : 01384 279480
[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. NO class
I. Appliance type
J. Ma imum CH pressure [bar]
K. Ma imum Flow temperature [°C]
L. Electrical supply
M. Protection
N. PIN
O. Serial number
P. Production year

Intergas Heating Ltd 6
2SAFETY 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 Compact HRE OV 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 a Gas Safe registered competent engineer
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 e ceeding 70kW (Part 1
Flues)
• BS 5440: Flues and Ventilation for gas appliances of rated input not e ceeding 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
e ceeding 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
2.3 Approvals
Natural Gas
Intergas Compact HRE OV Pre-mi Condensing Open Vent Boiler
British Gas Service Listing:
Compact HRE 30 OV G.C.N. 41-291-06
Compact HRE 24 OV G.C.N. 41-291-05
Compact HRE 18 OV G.C.N. 41-291-04
Notified /Body
The Intergas Compact HRE OV 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

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2.4 Technical data
Appliance category C13; C33; C43; C53; C83
Gas supply pressure 20 mbar -G20 ; 37 mbar – G31
Gas Category II2H3P
Technical data Compact HRE OV 18 24 3
SEDBUK Rating A A A
Gas Council number G.C. 41-291-04 G.C. 41-291-05 G.C. 41-291-06
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
Ma . CH-water pressure Bar 2.5 2.5 2.5
Ma . CH water temperature °C 90 90 90
Other data
Gas consumption (G20) m
3
/h 0.58 – 1.94 0.75 – 2.46 0.79 – 2.80
Gas consumption (G31) m
3
/h 0.22 – 0.74 0.28 – 0.94 0.30 – 1.07
Appliance pressure loss (CH) mWk See § 10.5 See § 10.5 See § 10.5
NO class natural gas 5 5 5
NO class LPG 5 4 5
Electrical data
Mains power V 230 230 230
Safety class IP IP44 IP44 IP44
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
We have a policy for continual improvement and development, therefore we reserve the right to change specifications without prior notice.

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2.5 Components
A. Flue adapter (only to be used in combination with the
accompanying elbow in flue sets)
J. Mains lead 230 V AC without plug (stripped)
B. Flow CH K. Condensate trap
C. Return CH M. Ionisation / Ignition electrode
D. Sight glass N. Fan
E. Sensor S1 O. Gas valve
F. Heat e changer P. Position of data plate
G. Sensor S2 Q. Boiler controller
H. Condensate drain pan R. Operating panel and read-out
I. Connection block / terminal strip X4

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3GENERAL BOILER INFORMATION
3.1 General
The Intergas Compact HRE OV wall mounted, gas fired boiler is suitable for use in
open vent systems with a heating system feed tank. The appliance is designed to
transfer heat to the water circuit in a CH system and when an indirectly heated
domestic hot water (DHW) storage cylinder is installed, apply heat to the DHW
installation.
The air supply and combustion gas flue connection is as standard prepared for a
concentric 60/100 flue system. The Intergas Compact HRE OV wall mounted gas fired
boiler carries the CE rating and IP44 electrical protection.
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 metering ring. 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 accessible through the parameter list in the software.
3.4 Heat transfer
Heat transfer to the boiler’s heating circuit is obtained via a primary, gas to water heat
e changer within a hermetically sealed combustion chamber. A modulated speed fan
blows the gas/air mi ture into the combustion chamber and e pels the products of
combustion to outside air via an associated flue system.
3.5 Central heating system
An e ternal pump can be connected on terminal X2/7-8, see chapter 13.
3.6 Room temperature control
Room temperature can be controlled by the use of an e ternal 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 integral 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. When an e ternal controller is used the integral clock
must be set onto c-on (See § 4.4).

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4OPERATION
4.1 General
The Intergas Compact HRE OV wall mounted, gas fired open vent boiler is a
modulating high efficiency boiler. This means that the power is adjusted in line with the
desired heat requirement. It is designed to be used in an open vented system with
heating system feed tank.
The appliance is equipped with an electronic boiler controller which, each time heat is
requested from the heating supply, starts the fan, opens the gas valve, ignites the
burner and continuously monitors and controls the flame, depending on the requested
output.
4.2 Central heating mode
When a heating demand is requested (power is on, the timer and thermostat are calling for
heat) the e ternal 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 preset
period of time to dissipate any e cess heat from within the boiler’s heat-e changer. After that
the boiler will revert to stand-by, waiting to respond to the ne t heating demand.
4.3 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 e ternal pump operates and the e changer 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 e changer).
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.
0 Pump overrun of CH
After the end of CH operation the e ternal 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.

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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 appro imately 15 seconds. If after 4 ignition attempts
the burner is not yet burning, the boiler controller goes into fault mode (See § 11.1 ).
5 CH operation
An on/off thermostat, an OpenTherm thermostat, an e ternal 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 e ternal sensor the desired CH suppply
temperature is determined by the heating line programmed in the boiler controller. For
the latter two, however, the ma imum 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.
4.4 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.
When an e ternal controller is used the internal clock must be set onto c-on.
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 ne t 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.
4.5 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.

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4.6 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 fi ed 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 ma imum CH power
setting (See § 10.3, parameter 3) and (1 ) “h”
Burner on with ma imum DHW power
(See § 10.3, parameter 4) and (2 ) "H"
Switch off test program and Actual situation
4.7 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 external pump runs until the heat exchanger
temperature is sufficient. When the appliance frost protection is
activated the symbol code 7
77
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 § 8.2.1).
Note
If the appliance is out of operation ( - on the service display) the appliance ’s internal frost
protection is still active. However, this means there will be no response to a request for heat
from an (external) frost thermostat.

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5INSTALLER IMPORTANT POINTS
Please read all instructions before fitting this appliance
• 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.
• It is required under Gas Safe Regulations for the installation to be notified to Building
Control (Gas Safe Notifcation).
• Before proceeding to commission the boiler check the gas inlet pressure is 20mbar (NG)
or 37mbar for Propane.
• Combustion analysis with a correctly calibrated and certificated analyser is essential for
safe commissioning of the boiler.
• A suitable scale reducer must be fitted if water hardnes is above 200 ppm.
• 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 flu es and debris from them. This should be done particularly where boilers
are being fitted to e isting radiator circuits (please refer to current Standard Codes of
Practice).
• 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 (= ma . power CH) or parameter 4 (= ma . power domestic water).
• All flu es, residues and cleaner must be flushed from pipe-work and radiators prior to
commissioning.
• E ternal e pansion vessels are best connected water side downwards to allow correct
draining/cleaning of system and to prolong the life of the vessel diaphragm.
• Note: an anti-cycle delay time can be set up to a ma imum of 15 minutes by adjusting
parameter P as described in § 10.3.
• If you e perience 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.

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6ACCESSORIES
Description Article number
Pipe cover set (incl. mounting material) 093217
Outside sensor 203207
DHW storage cylinder sensor 065117
Diverter valve 23 V 092647
Sampling cap 847000
Bend 45° 084661
Bend 9 ° 084660
Deflector kit 081295
Weather slate (steep roof) 087910
Weather slate (flat roof) 087372
Extension L = 1 incl. wall bracket 082975
Horizontal telescopic offset wall terminal
Only to be used in combination with the base adapter on the boiler
081298
Horizontal straight wall terminal extended
Only to be used in combination with the base adapter on the boiler
082980
Horizontal telescopic wall terminal
Only to be used in combination with the base adapter on the boiler
081297
Vertical roof terminal
(incl. boiler adapter 60/100)
082973

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Plume management kit 081294
Elbow 9 ° (for plume management kit) 081284
Elbow 6 ° (for plume management kit) 081285
Extension L = 1 incl. wall bracket (for plume management kit) 081286

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7INSTALLATION
7.1 Overall dimensions
A =
Supply CH
Ø22
B =
Return CH
Ø22
C =
Gas
½”
F =
Condensate drain
Ø25 (fle ible)
G =
Drain PRV
Ø15
H =
710
Compact HRE OV 30
H =
650
Compact HRE OV 24
H =
590
Compact HRE OV 18
Z1=
Standard flue pipe
Ø60/100 (concentric)
Z2=
Standard off
-
set flue
pipe
Ø60/100 (concentric)

Intergas Heating Ltd 17
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 e ternal 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
• The wall on which the boiler is mounted 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 cm
2
must 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 Installing the appliance
1. Unpack the appliance.
2. Check the contents of the packaging. It consists of:
•Appliance (A)
•Wall mounting strip (B)
•Condensate trap (C)
•Pressure fitting 22 mm (2 pcs)
•Gas isolation valve 15/22 mm compression
•Installation instructions
•Operating instructions
•Warranty card
•Template for wall mounting
3. Check the appliance for possible damage: report damage immediately to the
supplier.
4. If the wall mounting strip is secured to the wall then slide the boiler down until
latched.
5. Connect the flue and return pipe to the installation using the enclosed
compression fittings 22 mm.
6. Connect the gas valve to the gas pipe.
7. Fit the fle ible tube to the condensate trap outlet.
8. Fill the condensate trap with water and slide it as far as possible upwards on to
the condensate drain connector below the appliance.
9. Connect the fle ible tube from the condensate trap to the drain via an open
connection. The condensate discharge system must be made of plastic, no other
materials may be used. The discharge duct must have a minimum gradient of 5 –
20 mm/m. Condensate discharge via the gutter is not allowed given the risk of
frost and the possible damage to materials.
10. Fit the flue.
CAUTION
Always fill the condensate trap with water and place
it on the boiler before powering up the boiler.
Not placing or filling up the condensate trap may
cause flue gases to come into the installation room
and can lead to dangerous situations!
In order to place the condensate trap the front cover
must be pulled forward or removed entirely.
Note
It is recommended that any external condensate pipe is insulated and increased to
32mm diameter in order to prevent the condensate from freezing.
7.3.1 Fitting the cover plate
Hang the flanged upper edge of the cover plate on the washers under the base of the
appliance and slide the cover plate as far as possible towards the rear.

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8CONNECTION
8.1 Connecting CH installation
1. Flush the CH system thoroughly to clean.
2. Connect the flue and return pipe to the installation using the enclosed press
fittings 22 mm.
3. All pipes must be fitted unstressed in order to prevent the pipes from ticking.
Make sure the compression fittings are thightened thoroughly to prevent leakage.
CAUTION
Under no circumstances is it allowed to connect the flow and
return of the boiler to the installation by means of a soldered
connection.
Always use the enclosed compression fittings !
8.1.1 The CH system should be equipped with:
• A drain tap at the lowest point(s) of the installation.
• A heating system feed tank.
8.1.2 Thermostatic radiator valves
If all radiators are equipped with thermostatic or radiator valves, an auto bypass
must be fitted in order to guarantee minimum water circulation. The auto bypass
must be at a distance of at least 20 ft from the appliance in order to prevent
overheating of the appliance.
8.2 Gas connection
1. Fit the enclosed gas isolation valve on the gas pipe under the boiler.
2. Connect the appliance to the gas supply.
3. Check the gas carrying parts for leakage at a ma imum pressure of 500 mm
H
2
O.

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8.3 Electrical connection
CAUTION
A fused spur or an unswitched socket must be located no
more than 1 metre from the appliance.
For installation in damp rooms a fixed connection is
obligatory.
When working on the electrical circuit always isolate the
electric supply.
1. Slide the cover plate (A) (if present) to the front to remove.
2. Open the display cover and unscrew both screws to remove the front cover.
3. Pull the boiler controller unit forwards; the boiler controller will tip downwards to
provide access.
4. Consult sections § 8.3.1 and chapter 13 for making the connections.
5. After making the desired connections plug the appliance into an earthed wall
socket.
8.3.1 Electrical connections
Temperature control Connector X4 Notes
Room thermostat 6 – 7 Voltage free.
Remove link 6-7
Outside temperature sensor 8 – 9 -
Frost protection thermostat 6 – 7 Parallel to room
thermostat
Power supply 24 V DC 6 – 7 – 9 6 = 24 V DC
7 = room thermostat
9 = 0 V DC
Open Therm (OT) 11 – 12 Remove link 6-7
Temperature control Connector X2 Notes
Room thermostat 230 V or
e ternal control 230 V.
1 – 3 Remove link 6 – 7
(connector X4)
Frost thermostat 230 V 1 – 3 Remove link 6 – 7
(connector X4)
Switch live from S-plan or Y-plan onto connector X2, no.1.
See chapter 13.2 and 13.3 for complete electrical schedules.