COMBAT Elite Pro EPCG 75 Guide

Heating Solutions Ltd
Elite Pro
Warm Air Cabinet
Heaters
Combat Heating Solutions Ltd
Unit 20 Red Mill Industrial Estate
Rigby Street
Wednesbury
West Midlands
WS10 0NP
Tel:[phone]
Email: [email protected]
Cabinet Heaters
Installation and Commissioning Manual
Models: Elite Pro EPCG 75-135
FOR YOUR SAFETY
If you smell gas:
• Open windows
• DO NOT try to light any appliance
• DO NOT use any telephone in your building
• Extinguish any open flame
• Leave the building
• Immediately call your local fuel supplier after
leaving the building.
• Follow the fuel supplier’s instructions
• If you cannot reach your fuel supplier, call the
Emergency Services
Installer:
Please take time to read and understand these
instructions prior to any installation.
Installer must give a copy of this manual to the owner
Owner:
Keep this manual in a safe place in order to provide
your service technician with necessary information
WARNING
FIRE HAZARD
Keep all flammable objects, liquids and vapours the minimum
required clearances to combustibles away from the heater.
Some objects will catch fire or explode when placed close to
the heater.
Failure to follow these instructions can result in death, injury
or property damage
WARNING
Improper installation, adjustment, alteration, service or
maintenance can result in death, injury or property damage.
Read the installation, operation and service manual thoroughly
before installing or servicing this equipment
Installation must be done by a registered installer / contractor
qualified in the installation and service of gas-fired heating
equipment or your gas supplier
CBT00014-3 Elite Pro Cabinet Heaters Installation and Maintenance Manual December 2023

Heating Solutions Ltd
2
TECHNICAL UPDATES
INFORMATION REGARDING UPDATES TO THIS MANUAL ARE LISTED BELOW AND SHOULD BE NOTED BEFORE
COMMENCING WITH ANY INSTALLATION WORK.
Date of Amendment Version No Page Description
27/11/2023 CBT0014-2 16 6.2 change of text reference condensate pipe
27/11/2023 CBT0014-2 17 Figure 4 changes to bends and LHS and RHS burner ref
27/11/2023 CBT0014-2 18 Addition of Figure 5
27/11/2023 CBT0014-2 19 7.1 Addition of text ref fans and ventilation
27/11/2023 CBT0014-2 22 9.1 Addition of text in NB
27/11/2023 CBT0014-2 41 13.1 & 13.2 text amended
28/11/2023 CBT0014-2 14 4.4 Amendment to CO² rates and addition of CO² flow rates
28/11/2023 CBT0014-2 18 Figure 5 changes to bend degrees
18/12/2023 CBT0014-3 14 Change to table 4.4
18/12/2023 CBT0014-3 32 Amendment to text 10.3.5

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CBT00014-3 Elite Pro Cabinet Heaters Installation and Maintenance Manual December 2023
UKCA & CE Declaration of Conformance
We declare that the following range of Combat Warm Air Cabinet Heaters:
Models: Elite EPCG 75, 105 and 135
Have been designed and manufactured to comply with the following
EC Directives and Standards:
Gas Appliance Regulation 2020(SI2020/676)
Energy Related Product Directive (ErP-Lot 21 Warm Air) 2009/125/EC
Electrical Equipment (Safety) Regulations 2016 (EU Exit) Regulations 2019
Electro Magnetic Compatibility Regulations 2016 (EU Exit) Regulations 2019
EC type-examination Certificate Number: UKCA/XXXXXXXXXXXXXX
EC type-examination Certificate Number: CE/XXXXXXXXXXXXXX
Report Number: XXXXXX
Notified Body: Kiwa Gastec-0558-Date I and Kiwa Gastec
Product Approval
Combat Heating Solutions Limited appliances have been tested and UKCA/CE certified as complying with
the essential requirements of the Gas Appliance Directive, the Low Voltage Directive, the Electromagnetic
Compatibility Directive and the Machinery Directive for use with natural gas when installed, commissioned and
maintained in accordance with these instructions.
These instructions refer to gas appliances designed to operate in the UK and European Union. Appliances
designed for other countries (Non-European Union of the appliance are compatible).
2022 Combat Heating Solutions Limited
All rights reserved. No part of this work covered by the copyrights herein may be reproduced or copied in
any form or by any means - graphic, electronic, or mechanical including photocopying, recording, taping or
information storage and retrieval services - without written permission of
Combat Heating Solutions Limited

Heating Solutions Ltd
4
1 Heater Safety 6
1.1 Manpower Requirements 6
1.2 Safety Labels and their Placement 7
2 Installer Responsibility 8
2.1 Laminated Wall Plate 8
2.2 Corrosive Chemicals 8
2.3 National Standards & Applicable
Regulations 9
3 Critical Considerations 10
3.1 Basic Information 10
3.2 Location & Suspension 10
3.3 Required Clearances to Combustibles 10
3.4 Ventilation 10
3.5 Electrical Supply 11
3.6 Fuel Supply 11
3.7 Flue 11
4 Specifications 12
4.1 EPCG Heaters 12
4.2 Air Outlet and Flue Arrangements 13
4.3 General Technical Data (all models) 14
4.4 Technical Data CHSB Gas Fired Burner 14
5 Heater Installation 15
5.1 General 15
5.2 Handling 15
6 Flue Installation 16
6.1 Flue Installation 16
6.2 Horizontal Flue Installation 16
6.3 Type B22 Appliance 17
6.4 Type C12, C23 & C62 Appliance 17
7 Air Supply 19
7.1 Room Sealed Installation 19
7.2 Open Flued Installation 19
7.2.1 Heater Installed Within a Heater Space 19
7.3 Building Ventilation 19
7.4 Isolated Plant Rooms 19
7.5 Air Outlet Ducting 19
7.6 Return Air Ducting 20
8 Fuel Supply 21
8.1 Gas Connection 21
8.2 Requirements 21
9 Wiring & Electrical 22
9.1 Electrical Supply 22
9.2 Remote Controls 22
9.2.1 Positioning of Room Thermostats or Combat
Control (if not factory fitted) 22
9.2.2 Remote Frost Thermostat 22
9.2.3 Burner Operation 22
9.2.4 Remote Fan Controls 22
9.3 Wiring Diagram EPCG 75 1-P 23
9.4 Wiring Diagram EPCG 105-135 3-P 24
9.5 Wiring Diagram EPCG 105-135 1-P 25
9.6 Wiring Diagram EPCG 185-285 3-P 26
9.7 P25F NG Layout 27
10 Commissioning 28
10.1 Gas Fired Heater 28
10.1.1 Pre-Commission Checks 28
10.1.2 Air Delivery Heads 29
10.1.3 Electrical Checks 29
10.1.4 Polarity Test (1Ø) 29
10.1.5 Polarity Test (3Ø) 29
10.1.6 Fan Rotation Check 29
10.1.7 Fan Motor Overload Relay Check 29
10.1.8 Mechanical Checks 29
10.1.9 Burner Checks 29
10.1.10 Gas Supply 29
10.1.11 Before Operating the Heater 29
10.2 Commissioning Per Mix Gas Burner 30
10.2.1 Inlet Working Pressure 30
10.2.2 Commission Starts 30
10.2.3 Test Mode 30
10.2.4 Check Gas Rate 30
10.3 Motor Starter and Thermal Overload 32
10.3.1 Burners 32
10.3.2 Gas Valves 32
10.3.3 Gas Valve Off Set Adjuster 32
10.3.4 Ratio Adjustment 32
10.3.5 Combustion Testing (all models) 32
10.3.6 Complete the Commissioning 33
10.3.7 Turning off the Heater 33
10.3.8 Instruction to the User 33

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CBT00014-3 Elite Pro Cabinet Heaters Installation and Maintenance Manual December 2023
11 User Instructions 36
11 User Hazard Warnings 37
11.1 Heater Operation 37
11.1.2 Summer Fan 37
11.1.3 Burner Lockout Reset Button 37
11.1.4 On/Off Instructions 37
11.1.5 Simple Fault Finding (General) 37
11.1.6 Simple Fault Finding (Burner) 37
12 Service & Maintenance 38
12.1 Servicing Instructions 38
12.2 Burner Maintenance 39
12.3 Fan Motor Assembly Maintenance 39
12.4 Heat Exchanger Maintenance 39
12.5 Thermal Insulation 39
12.6 Maintenance Check List 39/40
13 Conversion Between Fuels 41
13.1 General 41
13.2 Conversion (NG-LPG/LPG-NG) 41
14 Troubleshooting 42
14.1 General Troubleshooting 43
14.2 For Main Fan Circuit (3Ø) 44
14.3 For Main Fan Circuit (1Ø) 45
14.4 Troubleshooting Terminology 46
15 Removal of Components 47
15.1 Burner Components 47
15.2 D.O.L Main Fan Starter & Thermal
Overload Relay (3Ø) 47
15.2.1 The Contactor 47
15.3 Control Circuit Protection 48
15.4 Main Fan Motor (Belt Drive) 48
15.5 Main Fan Unit 48
15.6 Burner Assembly Removal (All Models) 48
15.7 Ignition Electrode Removal, To Remove
the Ignition Electrode 48
Figure 1 Burner & Combustion Label Placement 7
Figure 2 Installation & Combustibles Clearances 11
Figure 3 Typical Installation (Gas Fired) 15
Figure 4 Flue Termination & Offset Flues with
135º Bends 17
Figure 5 Gas Fired Room Sealed Vertical &
Horizontal Flue 18
Figure 6 Gas Fired Horizontal Open Flue Cabinet
Heater 18
Figure 7 Polarity Test 29
Figure 8 Functional Flow Diagram 31
Figure 9 Gas Train Schematic 34
Figure 10 Honeywell Gas Valve 34
Figure 11 Sit Gas Valve 35
Figure 12 Belt Tensioning (Belt Drive Versions
Only) 39
Figure 13 Ignition Electrode Relative Position to
Burner (All Models) 48
Figure 14 Burner Component Parts 49
Figure 15 Burner Assembly Removal 51
Figure 16 156 The Burner Assembly Removal (All
Models) 51
Figure 17 15.7 Ignition Electrode Removal to
Remove the Ignition Electrode 51

Heating Solutions Ltd
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1. Your safety is important to us
This symbol is used throughout the manual to notify
you of possible fire, electrical or burn hazards. Please
pay special attention when reading and following the
warnings in these sections.
Installation, service, and annual inspection of the
heater must be carried out by a registered installer/
contractor who is qualified and competent in installing
and servicing of gas and oil-fired heating equipment.
Read all manuals supplied with the appliance carefully
before installation, operation, or service of this
equipment.
This heater is designed for heating only non-residential
indoor spaces. Do not install in residential spaces.
These instructions, the layout drawing, local codes
and ordinances, and applicable standards that apply
to gas piping, electrical wiring, flueing, etc. must be
thoroughly understood before proceeding with the
installation.
Protective equipment is to be worn during installation,
operation, and service. Thin sheet metal parts have
sharp edges such as the various flue components. To
prevent injury, the use of work gloves is recommended.
Before installation, check that the local distribution
conditions, nature of gas and pressure, and adjustment
of the appliance are compatible.
The heater must be installed and operated under the
general concepts of reasonable use and installed using
best building practices.
This appliance is not intended for use by persons
(including children) with reduced physical, sensory,
or mental capabilities, or lack of experience and
knowledge, unless they have been given supervision
or instruction concerning the use of the appliance by a
responsible person for their safety.
Children should be supervised to ensure that they do
not play with the appliance.
For additional copies of the Commissioning, Operation
and Service Manual, or relevant burner and gas train
manuals, please contact:
Combat Heating Solutions Limited
Tel: [phone]
Email: [email protected]
Web: www.combat.co.uk
1.1 Manpower Requirements
To prevent personal injury and damage to the heater at
least two persons will be required for installation.
1.2 Safety Labels and their placement
Product safety labels should be replaced by the product
user when they are no longer legible. Contact Combat
Heating Solutions Limited to obtain replacement signs
or labels.
1. Heater Safety

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CBT00014-3 Elite Pro Cabinet Heaters Installation and Maintenance Manual December 2023
Logo
Label
Ligh�ng
Instruc�ons
Electrical
Hazzard
Label
Fire
Hazzard
Label
Burn
Hazzard
Label
Electrical
Hazzard
Label
Severe
Injury
Label
Address
Label
Ra�ng
Plate
Label
Figure 1 Burner & Combustion Label Placement

Heating Solutions Ltd
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WARNING
Product Damage Hazard
Do not use heater in area containing corrosive chemicals.
Refer to appropriate Material Safety Data Sheets (MSDS).
Failure to follow these instructions can result in product damage.
2. Installer Responsibility
2. Installer Responsibility
To install the heater, as well as the fuel and electrical
supplies, in accordance with applicable specifications
and regulations Combat Heating Solutions Ltd
recommends that the installer contacts a local building
inspector, fire officer or insurance company for
guidance.
• To use the information given in this manual together
with the local, national regulations to perform the
installation
• To install the heater in accordance with the
clearances to combustibles of this heater
• To furnish all the materials needed, which are not
as furnished as standard equipment e.g., ancillary
equipment
• To plan the location of the supports, relating to
flues and air intakes
• To provide access to burners for servicing
• To provide the owner with a copy of this installation,
commissioning, operation, and servicing manual
• Never to use the heater as a support for a ladder
or other access equipment and never hang or
suspend anything from the heater
• To ensure there is sufficient ventilation in the area to
comply with all the requirements of all the relevant
local and national codes
• To ensure the heater is placed in an approved
application
2.1 Laminated Wall Plate.
A laminated wall plate is available as a permanent
reminder of the safety instructions and the importance
of the required clearances to combustibles
Affix the plate by peeling off the backing of the adhesive
strips on the rear surface and position the plate on a
wall near the heater.
A copy of the wall plate is illustrated on the back cover
WARNING
Explosion Hazard
Equipment must have access to uncontaminated air at all times.
Failure to follow these instructions can result in death, injury, or
property damage.
Know your model number and installed configuration.
The model number and installed configuration are found
on the heater and in the Installation Commissioning
Operation and Service manual.
Write the largest clearance dimensions with permanent
ink according to your model number and configuration
in the open spaces of the plate.
2.2 Corrosive Chemicals.
Combat Heating Solutions Limited cannot be
responsible for ensuring that all the appropriate safety
measures are undertaken prior to installation; this is
entirely the responsibility of the installer.
The contractor, the sub-contractor, or the owner
identify combustible materials, corrosive chemicals,
or halogenated hydrocarbons*anywhere on the
premises.
*Halogenated Hydrocarbons are a family of chemical
compounds characterized by the presence of halogen
elements (fluorine, chlorine, bromine, etc.) These
compounds are frequently used in refrigerants, cleaning
agents, solvents, etc.
If these compounds enter the burners air supply, the
heater and its component’s lifespan will be greatly
reduced.
Warranty will be invalid if the heater is exposed to any
form of halogenated hydrocarbons.

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CBT00014-3 Elite Pro Cabinet Heaters Installation and Maintenance Manual December 2023
2. Installer Responsibility
2.3 National Standards and Applicable
Regulations
All appliances must be installed in accordance with
the latest revision of applicable standards, local and
national regulations.
This refers also to electric, gas or oil fuels, venting,
flueing, and installation ventilation.
Note:
Additional standards for installation in public garages,
aircraft hangers, etc. may be applicable.
The main relevant regulations for installations within the
UK are:
Gas Safety (installation and use) regulation, 1984 and
amendments-1996
• BS6230-Specification for the installation of gas-
fired forced convection air heaters for commercial
and industrial space heating with a rated input
exceeding 60kW. (This standard also applies to oil-
fired heater, except for the fuel supply).
• BS6230-Parts 2 & 3, fire precautions in design and
construction of buildings.
• BS6891-Low-pressure installation pipes.
• BS5410-Codes of practice for oil firing. Part 2
installation of 44kW and above output capacity
for space heaters, hot water, and steam supply
purposes.
• Institute of Gas Engineers document IGE/UP/2
• Institute of Gas Engineers document IGE/UP/10
• Building Regulations
• IEE Regulations
• Health and safety at work act.
• Requirements of local authority, fire officer and
insurance company.

Heating Solutions Ltd
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3. Critical Considerations
WARNING
Carbon Monoxide Hazard
Heater flues must be installed to outside in accordance with local
and national codes.
Failure to follow these instructions can result in injury or even
death.
WARNING
Fire Hazard
Keep all flammable objects, liquids and vapours the minimum
required clearances to combustibles away from heater.
Some objects will catch fire of explode when placed close to
heater.
Failure to follow these instructions can result in death, injury, or
property damage.
3.1 Basic Information
Cabinet heaters are supplied with burners suitable for
modulation in Gas versions as standard.
3.2 Location and Suspension
All Models:
• Must be installed indoors within the heated space.
• Must be installed for floor standing vertical
installation as supplied as standard.
• Must be installed in a manner which allows all the
upper panels and either of the lower side panels
to be removed to provide access to all serviceable
components.
• Must be placed on a firm, level, non-combustible
surface that can support its own weight. (See Page
12, Section 4.1) for weight details
• Special versions of the heater are available and
may be mounted horizontally. When installed
horizontally, the heater will normally lie on its left-
hand side when viewed from the burner. The same
clearances and comments on panel must be used,
except for the side the heater lies on.
3.3 Required Clearances to Combustibles.
• Clearances are the required distances that a
combustible object must be away from the heater
to prevent fire hazards. Caution should be used
when running the system near combustibles.
Some examples of combustible materials which may
catch fire include common items such as wood, paper,
rubber, fabric, etc.
Maintain clearances to combustibles at all times for
safety.
Clearances around the heater and flue must be as
indicated on (Page 11 Figure 2) to ensure access
for servicing, and correct operation. If clearances
to combustibles are not indicated, then installation
clearances apply.
Check the clearances on each heater for the installed
heater model to ensure the product is suitable for the
application and that the clearances are maintained.
Read and follow the safety guidelines below:
• Keep petrol or other combustible materials including
flammable objects, liquids, dust, or vapours away
from the heater or any other appliance
• Do not spray aerosols in the vicinity of this appliance.
• The stated clearances to combustibles represent
a surface temperature of 50°C (90°F) above room
temperature. Building materials with a low heat
tolerance (such as plastics, vinyl siding, canvas, tri-
ply, etc.) may degraded at lower temperatures. The
installers’ are responsible for ensuring that adjacent
materials are protected from any such degradation
and thereafter the end user’s responsibility upon
handover
• Products of size and weight that could possibly
draw into the distribution and combustion air
intakes must not be stored in close proximity to the
heater to prevent any such potential ingress.
3.4 Ventilation
It is important to ensure that there is adequate
air circulation around the heater to supply air for
combustion, ventilation, and distribution in accordance
with local and national codes

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CBT00014-3 Elite Pro Cabinet Heaters Installation and Maintenance Manual December 2023
3. Critical Considerations
WARNING
Fire Hazard
Keep all flammable objects, liquids and vapours the minimum
required clearances to combustibles away from heater.
Some objects will catch fire of explode when placed close to
heater.
Failure to follow these instructions can result in death, injury, or
property damage.
WARNING
Electrical Shock Hazard
Disconnect electric before service.
This equipment must be properly earthed.
Failure to follow these instructions can result in death or electrical
shock.
3.5 Electrical Supply
A permanent electrical supply to the appliance’s
electrical inlet connector of 230Vac 50Hz Ø and Earth
is required on models EPCG 75, for models EPCG 105
to 285 will require an electrical supply to the electrical
inlet connector of 400Vac 50Hz 3Ø Neutral and Earth.
(Special single phase version EPCG 105-135 models
are available with belt drive fan). The heater also
requires suitable energy controls in accordance with
requirements given on (Page 22 Section 9)
Time and temperature controls are supplied and fitted
as standard. On/Off control, temperature control,
and frost protection are available as a remote control
which needs to be site wired for proper operation of
the heater. Alternatively, any remote energy controls
may be used which must be wired in accordance with
(Page 23 Section 9.3 through to Page 26 Section 9.6)
3.6 Fuel Supply
It is important that the fuel supply pipe is sized correctly
to provide the inlet pressure as stated on the heater data
plate. The gas supply pipe and electrical connections
must not support any of the heaters weight
3.7 Flue
Choose heater siting to allow for the proper location of
the flue. Each heater must be fitted with an individual
and correctly sized sealed flue system, either open or
room sealed (See Section 6). No other appliance may
be connected to the flue. For room sealed installation,
the air intake must be the same sized sealed system
and the flue/air intake must terminate at an appropriate
concentric wall or roof terminal (See Section 6 Pages
16 through to 18)
Figure 2.
Installation clearances
and clearances to combustibles

Heating Solutions Ltd
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4. Specifications
Combat
C
E
A
32mm
70mm
G G
70mm
J
B
F
38mm 38mm 38mm
H
108mm
38mm
B
F
38mm 38mm
K
Models 75-135 Only
DD
Front View
(all models)
Side View
(models 75-135)
Side View
(models 185-285)
Rear View
(all models)
4.1 Dimension Data
Model Unit 75 105 135
˝A˝ Width mm 723 857 857
˝B˝ Depth (Cabinet Only) mm 860 860 1015
˝C˝ Height (Cabinet Only) mm 1734 1925 1925
˝D˝ Depth Overall mm 1150 1150 1305
˝E˝ Height Inc. Heads mm 2038 2230 2230
˝F˝ Left/Right Hand Spigot Height mm 781 781 940
˝G˝ Left/Right Hand Spigot Depth mm 457 457 560
˝H˝ Rear Air Inlet Spigot Depth mm 648 781 781
˝J˝ Rear Air inlet Spigot Height mm 361 446 446
˝K˝ Base to Flue Centre mm 1495 1750 1750
Weight Kg 200 245 270
Flue Diameter Ø mm 130 130 130
Maximum Flue Length M 8 8 8
Note:
Horizontal cabinet’s heaters are designed to lie on their left side as standard. When viewed from the burner front
*If minimum air flow requirements are not met, then temperature limit devices will shut down the heater.
**Do not exceed the maximum length of flue stated or the heater may not operate properly. Reduce the maximum
length stated by 1m for each 90º bend installed.
***As a manufacturer it is recommended that two 90° or four 45° bends are not installed as close coupled and
that a minimum distance of 0.5m is maintained between each 90° of bend installed
Combat
C
E
A
32mm
70mm
G
G
70mm
J
B
F
38mm 38mm
38mm
H
108mm
38mm
B
F
38mm 38mm
K
Models 75-135 Only
D
D
Front View
(all models)
Side View
(models 75-135)
Side View
(models 185-285)
Rear View
(all models)
Combat
C
E
A
32mm
70mm
G G
70mm
J
B
F
38mm 38m
m 38mm
H
108mm
38mm
B
F
38
mm 38mm
K
Models 75-135 Only
DD
Front View
(all models)
Side View
(models 75-135)
Side View
(models 185-285)
Rear View
(all models)

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CBT00014-3 Elite Pro Cabinet Heaters Installation and Maintenance Manual December 2023
4. Specifications
75 105135
185/285
75 105135185/285
184mm
38mm38mm 38mm38mm
38mm
38mm 38mm
38mm
38mm 38mm 38mm 38mm 38mm 38mm38mm 38mm
32mm 32mm 32mm
1238mm
940mm
781mm
400mm
781mm
648mm 781mm 781mm 940mm
4.2 Air Outlet and Flue Arrangements
Vertical and Horizontal Heaters - Free Blowing (Top View)
75 105135185/285
75 105135
185/285
184mm
38mm38mm 38mm
38mm
38mm
38mm 38mm
38mm
38mm 38mm 38mm 38mm 38mm
38mm
38mm
38mm
32mm
32mm
32mm
1238mm
940mm
781mm
400mm
781mm
648mm 781mm 781mm
940mm
Vertical and Horizontal Heaters - Air Outlet Spigots

Heating Solutions Ltd
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4.3 General Technical Data Table (All Models) Appliance Category II
Model Unit 75 105* 135*
Electrical Supply VAC 230v 50 Hz 400v 50Hz 3 Phase
Main Fan Type Direct Drive Direct Drive
Motor Size kW 0.75 2.2
Start Current A 11.5 9.0 2.2
Run Current A 6.5 5.0 3.7
Airflow Free Blowing M³/h 5200 8600 8600
*Models 105& 135 are available with 230v 1Ø electrical supply (Belt drive) as an extra cost option.
Note:
A permanent uninterrupted electrical supply is required for all models. When you are reading the following tables,
ensure that you are using the correct table for the burner and gas valve installed. The data tables includes a
burner ref letter that can be found on the heater data plate.
4.4 Pre-Mix Burner
Model Stage Unit 75 105 135
Heat Input Gross Nom kW 91.3 131.7 165
Min 34.6 55.7 63.0
Heat Input Net Nom kW 82.2 118.6 148.6
Min 31.2 50.2 56.7
Heat Output Nom kW 74.0 107.1 133.6
Min 30.2 48.3 54.8
Gas Rate Nat
Gas (G20)
Nom m³/h 8.4 11.6 14.3
Min 4.3 5.8 7.2
Burner Ref ELI-75C
Inlet Pressure Nat
Gas (G20) mbar
20
Inlet Pressure
Propane (G31) mbar
CO² (Guide) G20 Nom ±0.5% 8.6 9.1 9.0
Min ±0.5% 8.1 8.7 8.6
Gas Flow Rate G20 Nom m³/h 8.7 12.6 15.7
Min m³/h 3.3 5.3 6.0
Gas Connection Inches BSP ¾ ¾ ¾
Alternative burner arrangements may be fitted, always contact Combat Heating Solutions Limited on
0121 506 7700, for correct Part Number confirmation by quoting heater test No to sales [email protected]

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CBT00014-3 Elite Pro Cabinet Heaters Installation and Maintenance Manual December 2023
5. Heater Installation
WARNING
Crush Hazard
Use proper lifting equipment
and practices
Falling Hazard
Use proper safety equipment
and practices to avoid falling
Sever Injury Hazard
Use proper lifting equipment
and practices.
Equipment and accessories are
heavy
Cut/Pinch Hazard
Wear protective gear during
installation, operating and
service. Edges are sharp
Failure to follow these instructions can result in death, injury, or property damage.
5.1 General
Heaters are designed for floor standing vertical
installation. Special versions of the heater are available
and may be mounted horizontally.
When installed horizontally, the heater will normally lie
on its left side when viewed from the burner. The heater
should be placed on a firm level non-combustible
surface that can support its weight.
See Page 12, Section 4.1 for weight details
5.2 Handling
All cabinet heaters are supplied on a pallet and shrink
wrapped. Remove pallet, shrink wrap and all packaging
before installing the heater.
Combat
Air
Distribution
Heads
Flue
Flue Wall Terminal
Terminal
Master Flash
Master Flash
Electrical Isolator
NB Electrical services
must comply with
Current Regulations
and Standards
Connection
Union Gas Isolation
Valve
NB Gas services
must comply with
Current Regulations
and Standards
1m
NB Flue
Termination Clearances
must comply with
Current Regulations
and Standards
NB Flue
Termination Clearances
must comply with
Current Regulations
and Standards
Building
Ventilation must comply with
Current Regulations
and Standards
Building
Ventilation
Figure 3.
Typical Installation of a Gas Fired
Cabinet Heater

Heating Solutions Ltd
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WARNING
Fire Hazard
Keep all flammable objects, liquids and
vapours the minimum required clearances
to combustibles away from heater.
Some objects will catch fire or explode
when placed close to heater.
Carbon Monoxide Hazard
Heater flues must be installed to outside in
accordance with local and national codes.
Failure to follow these instructions can
result in injury or even death.
Cut/Pinch Hazard
Wear protective gear during installation,
operating and service.
Edges are sharp
Failure to follow these instructions can result in death, injury, or property damage.
6.1 Flue Installation.
The flue must terminate outside of the building. Flue and
air intakes must be a fully sealed system and correctly
sized for the model. See Page 12 Section 4.1 Flues
should be assembled as on Page 15 Figure 3 through
to Pages 17 to 18 Figures 4 and 5. The joints between
the flue and the roof must be properly sealed. If the
flue passes through a wall or ceiling of combustible
material, it must be enclosed by a sleeve made from
non-combustible material and be separated from the
sleeve to give an air gap which is ≥ 25mm.
For double walled flue pipe conforming to BS715, the
25mm separation distance should be measured from
the outer surface of the inner liner. For double wall
flue pipe conforming to BS443-2 and 3 the external
skinned air gap continues insulation to a standard
where no extra clearances to combustible material is
required other than normal installation tolerances.
Flues must be adequately supported so that the heater
does not bear the weight of the flue.
For straight and offset flue termination, See Page 17
Figure 4
6.2 Horizontal Flue Installation.
Horizontal flue should be fitted to ensure a slight
downward gradient approx 2° towards the terminal.
In the event whereby, there is a potential for the
formation of condensation to arise in any flue system
(vertical or horizontal in nature), traps should be included
at suitable locations to encourage the condensate to
flow freely to a point from which it may be released
in accordance with local water authority guidelines.
Condensate must not be allowed to drain back into the
heater as this could result in corrosion and damage.
When a condensate pipe is required to be attached
from the flue to the disposal point, the pipe must be
corrosion-resistant and have an internal diameter of at
least 25mm.
90° bends may be used in a flue, each 90°of bend used
will reduce the total permitted length of flue by 1m.
e.g., if the flue straight length totals 8m, if 2 90°bends
are added the total length would ∴become 10m
• As a manufacturer it is recommended that two 90°
or four 45° bends are not installed as close coupled
and a minimum distance of 0.5m is maintained
between each 90° of bend installed
Remember. If condensation is likely to occur in the
flue, then provision should be made for drainage, in
accordance with local authority water guidelines.
When designing the flue system, the prevention of the
formation and entrapment of condensation must be a
key consideration.
6. Flue Installation

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CBT00014-3 Elite Pro Cabinet Heaters Installation and Maintenance Manual December 2023
6.3 Type B22 Appliance
The flue must terminate outside the building and be
fitted with a low resistance terminal, vertical and
horizontal options shown See page 15 Figure 3.
6. Flue Installation
6.4 Type C12, C32 & C64 Appliance Room Sealed
The heaters can be designed to be installed as room
sealed appliances see Page 17 Figure 4. The flue
and combustion air intake are run as separate pipes
connecting to a special concentric wall or roof terminal.
Room sealed vertical and horizontal terminals are
available from Combat Heating Solutions.
Where required the flue and combustion air intake
may also be terminated independently to outside in
accordance with current regulations and standards.
=1m
= 2.5m
1m
If external flue height
is > than 2m a guy wire is required
If the point of a roof
intersection is within
2.5m of a near by
structure the flue
must terminate at
least 1m above that
structure
Use adequate support to
prevent heater carrying
the weight of the flue
Terminal
Use adequate support to
prevent heater carrying
the weight of the flue
=1m
=1m
Each 90° of bend
installed within a flue
system will reduce the
max. stated flue length
by 1m
i.e.
1x 90° bend
2 x 45° bends
=1m
=1m
Each 90° of bend
installed within a flue
system will reduce the
max. stated flue length
by 1m
Primary
i.e.
1 x 90° bend
2 x 45° bends
Connection
(always on LHS or
Combustion Air
RHS of burner)
Primary
Combustion Air
Connection
(always on LHS or
RHS of burner)
Figure 4. Flue Termination & Offset Flues with 135º Bends (Room Sealed)
Where room sealed equipment is required, the installer
should look at reducing the number of flue components,
wherever possible, keep flue lengths to a minimum so
as not to exceed the maximum stated flue length as
detailed in the data table page 12. This will also reduce
the potential use of unnecessary raw materials being
consumed and be beneficial to the environment
Concentric flue terminal arrangements can be used for
vertical and horizontal flueing options where required.

Heating Solutions Ltd
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Figure 5. Gas Fired Vertical & Offset Flues with 90° Bend or 45° Bend
=1m
= 2.5m
1m
If external flue height
is > than 2m a guy wire is required
Use adequate support to
prevent heater carrying
the weight of the flue
If the point of a roof
intersection is within
2.5m of a near by
structure the flue
must terminate at
least 1m above that
structure
Terminal
Use adequate support to
prevent heater carrying
the weightof the flue
Each 90° of bend
installed within a flue
system will reduce the
max. stated flue length
by 1m
i.e.
1 x 90° bend =1m
2 x 45° bends=1m
6. Flue Installation
Combat
Air
Distribution
Heads
Flue Wall Terminal
Master Flash
Electrical Isolator
NB Electrical services
must comply with
Current Regulations
and Standards
Connection
Union Gas Isolation
Valve
NB Gas services
must comply with
Current Regulations
and Standards
NB Flue
Termination Clearances
must comply with
Current Regulations
and Standards
Building
Ventilation must comply with
Current Regulations
and Standards
Building
Ventilation
Figure 6. Gas Fired Horizontal Open Flue Cabinet Heater

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CBT00014-3 Elite Pro Cabinet Heaters Installation and Maintenance Manual December 2023
7. Air Supply
WARNING
Explosion Hazard
Equipment must have access to uncontaminated air at all times.
Failure to follow these instructions can result in death, injury or
property damage
7.1 Room Sealed Installation
When installed as a room sealed heater, the air for
combustion is drawn in from outside the building. It is
important to ensure that there is adequate ventilation
to provide air for the distribution fans. Please note
that a room-sealed terminal may not be suitable for all
installations. It is the installer’s responsibility to check
the suitability and the location of the termination to
ensure that combustion products do not re-enter the
combustion air and that the terminal is installed in a
manner that does not restrict the combustion air to the
burner.
7.2 Open Flued Installation
It is important to ensure that there is adequate air
supply at all times for both combustion and heating
requirements in accordance with local and national
codes. When installed in this mode, the air supply to
the heater must also be fitted with a low resistance
terminal to prevent the ingress of debris. See Page 15
Figure 3
7.2.1 Heaters Installed Within the Heated Space
Where the volume of the heated space is greater than
4.7 m³ per kilowatt of total rated heat input and the air
change rate is at least 0.5/h, additional high-and low-
level ventilation will not be required. Ventilation will be
necessary for a building with an air change rate of less
than 0.5/h, per local and national codes. Ventilation
direct to outside must be provided as follows.
Heaters up to 70kW heat input: 5.0cm²per kW of rated
heat input.
Heaters above 70kW heat input: 350 cm²+2.5 cm²per
kW of rated heat input above 70kW.
7.3 Building Ventilation
Where ventilation is required, air must be taken from an
outside point where it is not likely to be contaminated
or obstructed.
Where natural ventilation is used, suitable ventilation
with outside air at low level must be provided in
accordance with Section 7.2.1 and local and national
codes. Where mechanical ventilation is used, extract
rate must be 5%-10% less than the inlet rate. The
mechanical ventilation must be interlocked with the
burner on the heater.
7.4 Isolated Equipment Rooms
Ventilation must prevent the isolated equipment room
temperature from exceeding 32ºC as well as prevent
any negative air pressure within the room. Any isolated
equipment room containing air heaters will require
permanent air vents direct to outside air in compliance
with local codes. Where natural ventilation is used,
suitable permanent openings at low and high level,
communicating directly with the outside air.
Where mechanical ventilation is used, the extract
rate must be 5%-10% less than the inlet rate. The
mechanical ventilation must be interlocked with the
burner on the heater.
7.5 Air Outlet Ducting
As standard, the cabinet heater would be manufactured
with a number of air distribution heads as shown in
section 4.2. As an option & upon request, the heater
can be supplied with a rectangular spigot air outlet, as
again shown in section 4.2, instead of the standard air
distribution head arrangement previously mentioned.
This air outlet spigot would then facilitate connection to
outlet ductwork.
It is recommended that the duct or plenum box be
the full size of the outlet area for at least twice the
spigot minor dimension before a change of direction
or reduction of area, for air to mix sufficiently and in
addition to moving air from the heater before adding
resistance.
Not following these recommendations may cause
high- temperature lockouts in certain circumstances.
It is strongly recommended that when any heater is
connected to installation ducting, a similar approach to
the fan control is used on heaters installed horizontally.
Any such control must be in parallel with the fan
thermostat so that the fan “run on” feature is still able
to operate. Refer to wiring diagrams in sections 9.3 to
9.6. Pages 23-26

Heating Solutions Ltd
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7.6 Return Air Ducting
As standard, the cabinet heater would be manufactured
with slotted air intake panels on both lower sides and
on the heater lower rear panel as shown in section 4.1.
As an option & upon request, the heater can be
supplied with various air intake arrangements such as a
side rectangular spigot air inlet, instead of the standard
slotted air intake panel arrangement as previously
mentioned.
When utilising spigot air inlets, any remaining panels
associated with air intake for distribution would normally
be blanked off, unless specified otherwise.
As each application may have different requirements,
it would need to be specified what your requirements
are at order stage.
Note: On the larger cabinet heaters, the rear is not
normally associated with a spigot as it would not leave
enough free area for the larger heater operation.
Where installations utilise recirculation ducting or fresh
air ducting as supply air for the heater air distribution,
it is important to ensure that there is adequate air
to supply the heater and that the installation is in
accordance with local and national codes.
Note:
When heaters are installed in the horizontal mode and
connected to distribution ducting and or inlet ducting
then the natural convected air flow through the heater,
before the main fan turns on, may be disrupted as any
residual heat finds a different exit route to that normally
associated with a vertical heater arrangement.
To ensure correct operation of the fan under these
circumstances, all cabinet heaters manufactured
specifically for horizontal mounting, the main fan will
operate in conjunction with the burner sequence
controller program.
When any heater is connected to installation ducting,
it is strongly recommended that a similar approach to
the fan control is used. Any such control must be in
parallel with the fan thermostat so that the fan “run on”
feature is still able to operate.
Refer to wiring diagrams in sections 9.3 to 9.6. Pages
23-26
7. Air Supply