Combat HVAC ELU 40 Guide

Combat Elite Unit Heater EL231117 Orig
Elite
Unit Heaters
Installation and
Commissioning
Manual
WARNING
FOR YOUR SAFETY
If you smell gas:
1. Open windows.
2. DO NOT try to light any appliance.
3. DO NOT use electrical switches.
4. DO NOT use any telephone in
your building.
5. Extinguish any open flame.
6. Leave the building.
7. Immediately call your local fuel
supplier after leaving the building.
Follow the fuel supplier’s
instructions.
8. If you cannot reach your fuel
supplier, call the Emergency Services
Fire Hazard
Keep all flammable objects, liquids and
vapors the minimum required clearances to
combustibles away from equipment.
Some objects will catch fire or explode when
placed close to equipment.
Failure to follow these instructions can
result in death, injury or property damage.
Tubular Unit Heaters
Elite Range 40-115
Unit 20 Red Mill Trading Estate, Rigby Street
Wednesbury, West Midlands, WS10 0NP
Installer
Please take the time to read and understand
these instructions prior to any installation.
Installer must give a copy of this manual to the owner.
Owner
Keep all manuals supplied with the appliance in a safe place
in order to provide your service technician with necessary
information.
Tel: [phone] Email:[e-mail]
Fax: [phone] Web: www.combat.co.uk
Installation must be carried out by a contractor
qualified in the installation and service of
commercial heating equipment.
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.
© 2017 Combat HVAC 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 HVAC Limited

Combat HVAC Limited
Registered at the above address
Company Registration Number: 2955148
DECLARATION OF CONFORMANCE
CERTIFICATION BODY: KIWA GASTEC NOTIFICATION BODY NUMBER: 0558
GAS FIRED WARM AIR PRODUCT RANGE
ELITE ELG CABINET HEATERS
ELITE ELU UNIT HEATERS
DECLARATION
Combat HVAC Limited hereby declare we are authorised to manufacture the
above range of gas fired warm air heaters which are manufactured and in
accordance with the CE and Essential Requirements of the Gas Appliance
Directive 2009/142/EC (ex-90/396/EEC).

Table of Contents
Page
Section 1 Heater Safety
1.1 Manpower Requirements 1
1.2 Safety Labels and Their Placement 1&2
Section 2 Installer Responsibility
2.1 Laminated Wall Plate 3
2.2 Corrosive Chemicals 3
2.3 National Standards and Applicable
Regulations 3
Section 3 Clearances to Combustibles
3.1 Required Clearances to Combustibles 4
Section 4 Critical Considerations
4.1 Ventilation 6
4.2 Gas Supply 6
4.3 Electrical Supply 6
4.4 Flue 6
Section 5 Specifications
5.1 ELUA Unit Heaters 7
5.2 ELUB, ELUC and ELUD Unit Heaters 8
5.3 General Technical Data Table 9
5.4 Technical Data Table 10
Section 6 Heater Installation
6.1 General 11
6.2 Basic Information 11
6.3 Location and Suspension 11
6.4 Handling 11
6.5 Suspension and Shelf Mounting 11
6.6 Wall Mounting 11
Section 7 Flue Installation
7.1 Flue Installation 13
7.2 Type C12, C32 & C62 Appliance 13
7.3 Type B22 Appliance 13
Section 8 Air Supply
8.1 Room Sealed Installation 15
8.2 Open Flue Installation 15
8.3 Building Ventilation 15
8.4 Isolated Equipment Rooms 15
Section 9 Optional Heater Configurations
9.1 Distribution Ductwork for ELUA, ELUB, ELUC
and ELUD Heaters 16
Page
Section 10 Gas Pipework
10.1 Connections 17
Section 11 Wiring and Electrical Information
11.1 Electrical Supply 19
11.2 Remote Controls 19
ELUA Warm Air Heater Wiring Diagram 20
ELUB/C Warm Air Heater Wiring Diagram 21
ELUD Warm Air Heater Wiring Diagram 22
ELUD External Motor Alternative Wiring
and Optional Thermostat/Time Switch
23
Section 12 Commissioning
12.1 Pre-Commission Checks 24
12.2 Gas Supply 24
12.3 Mechanical Checks 24
12.4 Begin Commissioning 25 & 26
12.5 Combustion Testing 27
12.6 Turning O the Heater 27
12.7 External Controls 27
12.8 Complete the Commissioning 27
12.9 Instruction to the User 27
Section 13 User Instructions
13.1 User Instructions 28
13.2 Heater Operation 28
13.3 Common User Controls 29
13.4 Lighting Instructions 29
13.5 Simple Fault Finding 29
Section 14 Servicing
14.1 Servicing Instructions 30
14.2 Burner Maintenance 30
14.3 Fan/Motor Assembly Maintenance 30
14.4 Heat Exchanger Maintenance 31
14.5 Gas Control Valve Maintenance 31
14.6 Flue Fan 31
14.7 Maintenance Checklist 31
Section 15 Conversion Between Gases
15.1 General 33

Page
Section 16 Trouble Shooting
16.1 General 34
16.2 Trouble Shooting for Automatic Ignition
Burner Systems 35
16.3 Trouble Shooting for Flame Supervision
System 36
16.4 Troubleshooting for Solenoid Valves 36
Section 17 Removal and Replacement Parts
17.1 Gas Valve 38
17.2 Burner Compartment 39
17.3 Ignition Electrode and Flame Probe 41
17.4 Flue Fan 42
17.5 Pressure Switch 43
17.6 Ignition Control 44
17.7 ELUA Axial Fan/Guard/Motor Assembly 44
17.8 ELUB & ELUC Centrifugal Fan/Guard/Motor
Assembly 44
17.9 Fan Data 45
Figure Page
Figure 1 Side and Back Panel Label
Placement
1
Figure 2 Side Panel Label Placement 2
Figure 3 Installation Clearances and
Clearances to Combustibles
5
Figure 4 Suspension Methods 12
Figure 5 Shelf Mounting Methods 12
Figure 6 Flue and Roof Detail 13
Figure 7 Vertical and Horizontal Flue
Termination Type B22 Appliance
14
Figure 8 Vertical and Horizontal Flue
Termination Type C12, C32 and C62 Appliance
14
Figure 9 Heaters Installed in Isolated
Equipment Rooms
15
Figure 10 Ducting 16
Figure 11 Gas Connection 18
Figure 12 Sequence of Operation Chart 25
Figure 13 Gas Valve for Heater
(Models 40-60)
26
Figure 14 Gas Valve for Heater (Models
75-115)
26
Figure 15 Heater Operating Sequence 28
Figure 16 Centrifugal Fan Orientation 45
Table of Contents Continued
Table of Figures

Product Approval
© 2017 Combat HVAC 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 HVAC Limited
Combat HVAC Limited appliances have been tested and 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 and LPG when installed,
commissioned and maintained in accordance with these instructions.
These instructions refer to gas appliances designed to operate in the European Union.
Appliances designed for other countries (Non-European Union) are available upon request.
These appliances must be installed in accordance with the local and national codes in force by registered persons and only in a suiciently
ventilated space, as specified in these instructions.
Before installation, check the local gas distribution systems, nature of gas and pressure, and adjustment of the appliance are compatible.

SECTION 1 Heater Safety SECTION 1
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Combat Elite Unit Heater EL231117 Orig
CombatHVAC Limited
CombatHVACLimited
Address and
Terminal Label
Rating Plate Label
Logo Label
Figure 1 Side and Back Panel Label Placement
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 qualified in the
installation and service of gas-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 in 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 gear is to be worn during installation, operation and
service. Thin sheet metal parts, such as the various flue components,
have sharp edges. 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 HVAC Limited.
Tel: [phone]
Email: [e-mail]
Web: www.combat.co.uk
1.1 Manpower Requirements
To prevent personal injury and damage to the heater, a minimum of two
persons will be required for installation.
1.2 Safety Labels and Their Placement
Product safety signs or labels should be replaced by the product user
when they are no longer legible. Contact Combat HVAC Limited for
obtaining replacement signs or labels

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Combat Elite Unit Heater EL231117 Orig
Lighting Instructions Label
Figure 2 Side Panel Label Placement

Installer Responsibility
SECTION 2
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Combat Elite Unit Heater EL231117 Orig
CAUTION
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.
To install the heater, as well as the fuel and electrical supplies, in
accordance with applicable specifications and regulations. Combat
HVAC Limited recommends the installer contact a local building
inspector, Fire Oicer or insurance company for guidance.
To use the information given in this manual together with the local and
national regulations to perform the installation.
To install the heater in accordance with the clearances to combustibles
of this heater.
To furnish all needed materials not furnished as standard equipment.
To plan the location of supports, flues and air intakes.
To provide access to burners for servicing.
To provide the owner with a copy of this installation, commissioning,
operation and service manual.
To never use heater as support for ladder or other access equipment
and never hang or suspend anything from the heater
To ensure that there is suicient ventilation in the area to comply with
the requirements of all relevant local and national regulations.
To ensure the heater is placed in an approved application.
2.1 Laminated Wall Plate
A laminated wall plate is available for the heater as a permanent
reminder of the safety instructions and the importance of the required
clearances to combustibles. Aix the plate by peeling o 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. Know your
model number and installed configuration. The model number and
installed configuration are found on the burner 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 on the plate.
2.2 Corrosive Chemicals
Combat HVAC Limited cannot be responsible for ensuring that all
appropriate safety measures are undertaken prior to installation; this
is entirely the responsibility of the installer. It is essential that the
contractor, the sub-contractor, or the owner identifies the presence
of 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 air supply
of the burner, the lifespan of the heater components will be greatly
reduced. Warranty will be invalid if the heater is exposed to halogenated
hydrocarbons.
2.3 National Standards and Applicable Regulations
All appliances must be installed in accordance with the latest revision
of applicable standards and local and national regulations. This refers
also to the electric, gas and venting, flueing and insulation ventilation.
Note: Additional standards for installations in public garages, aircraft
hangars, etc. may be applicable.

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Combat Elite Unit Heater EL231117 Orig
Clearances to Combustibles
SECTION 3
WARNING
Fire Hazard
Keep all flammable objects, liquids and
vapors the minimum required clearances to
combustibles away from heater.
Some objects will catch fire or explode when
placed close to heater.
Failure to follow these instructions can result
in death, injury or property damage.
3.1 Required Clearances to Combustibles
Clearances are the required distances that combustible objects must
be away from the heater to prevent fire hazards. Caution should be used
when running the system near combustibles.
Combustibles are materials, which may catch on fire and 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
5, figure 3 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 model heater being
installed to make sure the product is suitable for your application and
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 this 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 be subject to degradation at lower
temperatures. It is the installer’s responsibility to assure that
adjacent materials are protected from degradation.
* Maintain clearances from heat-sensitive equipment and
workstations.
* Maintain clearances from vehicles parked below the heater.
* Maintain clearances from swinging and over-head doors,
overhead cranes, vehicle lifts, partitions, storage racks, hoists,
building construction, etc.
* In locations used for the storage of combustible materials, signs
must be posted to specify the maximum permissible stacking
height to maintain required clearances from the heater to the
combustibles. Signs must be posted adjacent to the heater
thermostat. In the absence of a thermostat, signs must be posted
in a conspicuous location.
* Consult local Building Inspector, Fire Insurance Carrier or other
authorities for approval of proposed installation when there is
a possibility of exposure to combustible airborne materials or
vapours.
* Hang heater in accordance with the minimum suspension
requirements on Page 12, Section 6 and Figure 4 and 5.
* Aix the tag to a wall near the heater.

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Combat Elite Unit Heater EL231117 Orig
The heater must always be installed at least 2.5m above the floor.
The flue pipe must have clearance from combustibles by 5cm.
If installed at low levels where individuals can come into contact with hot heat exchanger components, adequate guarding must be provided .
All distances are minimum clearance requirements for service access, air flow and safety.
Figure 3: Installation Clearances and Clearances to Combustibles
Installation Clearances Clearances to Combustibles
Heaters may be mounted at higher level if destratification fans
an/or turn down down nozzles are installed.
**80cm is necessary to service the heater

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Combat Elite Unit Heater EL231117 Orig
Critical Considerations
SECTION 4
Carbon Monoxide Hazard
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.
WARNING
Fire Hazard
Connect gas supply according to figure 11.
Do not use gas supply pipe and electrical
connections to support heaters weight.
Gas can leak if not installed properly
Failure to follow these instructions can result in
death, injury or property damage.
DANGER
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.
4.2 Gas Supply
4.3 Electrical Supply4.1 Ventilation
A permanent 230 V 50 Hz electrical supply is required at the main
electrical terminals. The heater also requires suitable energy controls in
accordance with Section 11.
4.4 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 (See Section 7).
No other appliance may be connected to the flue.
For room sealed installation, the air intake must be the same size
sealed system and the flue/air intake must terminate at an approved
concentric wall or roof terminal.
It is important that the gas 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 heater’s weight.

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Combat Elite Unit Heater EL231117 Orig
Model Unit 40 50 60 75 90 100 115
AWidth mm 1135 1135 1135 1318 1318 1318 1318
BHeight mm 682 891 891 1100 1100 1310 1310
CSupport Spacing mm 448 448 448 631 631 631 631
FCentre of Flue mm 277 434 434 348 348 537 537
GCentre of Flue/Air Intake mm 140 140 140 225 225 225 225
ZLength mm 853 853 853 853 853 853 853
Flue/Air Intake Pipe Size mm 100 100 100 130 130 130 130
Weight kg 92 115 122 169 169 203 203
Specifications
SECTION 5
5.1 ELUA
Dimension Data (ELUA All Models)

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Combat Elite Unit Heater EL231117 Orig
Model Unit 40 50 60 75 90 100 115
KELUB Depth mm 1026 1026 1026 1076 1076 1076 1076
LELUB Height mm 680 895 895 1100 1100 1380 1380
MELUC Height mm 610 895 895 1100 1100 1431 1431
NInlet and Outlet Duct
Spigot Height mm 534 817 817 1024 1024 1233 1233
PInlet and Outlet Duct
Spigot Height mm 709 707 707 888 888 888 888
Weight ELUB kg 104 139 146 210 210 237 237
Weight ELUC kg 117 157 163 215 215 260 260
Weight ELUD kg 101 124 131 181 181 209 209
ELUB/C (All Models) ELUC (All Models)
ELUD (All Models) ELUD (and all models fitted with an outlet spoigot)
5.2 ELUB, ELUC and ELUD
Dimension Data ELUB, ELUC and ELUD

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Combat Elite Unit Heater EL231117 Orig
Model ELU 40 ELU 50 ELU 60 ELU 75 ELU 90 ELU 100 ELU 115
ELUA With Axial Fan
Total Electrical Load W 729 729 867 1477 1477 1661 1661
Run Current A2.8 2.8 3.4 5.7 5.7 6.5 6.5
Start Current A 6.2 6.2 6.8 12 12 13 13
Air Flow m3/h 5800 7900 8500 13000 14600 14600 15300
Sound Pressure
Level at 3m
[NR]
dB(A)
[51]
56
[52.1]
57.1
[52.1]
57.1
[52.3]
5 7. 3
[52.3]
5 7. 3
[52.3]
5 7. 3
[52.3]
5 7. 3
ELUB With Centrifugal Fan and ELUC With Centrifugal Fan and Duct Inlet
Total Electrical Load W 1695 3167 3167 3581 3581 5444 5444
Normal Run Current A 7.0 13.4 13.4 15.2 15.2 23.3 23.3
Normal Start Current A 10.5 20.0 20.0 22.8 22.8 30.0 30.0
Normal Speed High High High High High High High
Air Flow m3/h 5800 7900 8500 13000 14600 14600 15300
Sound Pressure
Level at 3m
[NR]
dB(A)
[59]
59.5
[61]
61.5
[61]
61.5
[62]
61.8
[62]
61.8
[63]
64.2
[63]
64.2
ELUD Duct Heater With No Fan
Minimum Air Flow
Required**
m3/h 5800 7900 8500 13000 14600 14600 15300
Pressure Loss Across
Heat exchanger
Pa 30 30 30 30 30 30 30
Flue and Air Intake
Flue and Air Intake Size mm Ø 100 100 100 130 130 130 130
Maximum Straight
Flue/Air Intake*
m10 13 15 15 17 20 20
5.3 General Data Table

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Combat Elite Unit Heater EL231117 Orig
5.4 Technical Data Table Appliance Category II
Model ELU 40 ELU 50 ELU 60 ELU 75 ELU 90 ELU 100 ELU 115
Heat Input
(Gross CV)
kW 4 7. 7 61.5 71.3 95.0 111.0 119.0 134.7
Heat Input
(Net CV)
kW 43.0 55.4 64.2 85.6 100.0 10 7. 2 121.4
Approximate
Heat Output
kW 40.0 50.0 60.0 80.0 93.0 100.0 114.0
Thermostat Limit Thermodisc
ELUA, B, C, D ºC 72.0 72.0 72.0 72.0 72.0 72.0 72.0
Natural Gas (G20) Data - Inlet Pressure 20 mbar. (Min: 17 mbar, Max:25 mbar)
Burner Pressure mbar 10.0 10.5 10.0 6.5 6.5 6.5 7. 3
Gas Rate m3/h 4.2 5.4 6.3 8.7 9.8 10.7 12.0
LPG Gas Propane (G31) Data - Inlet Pressure 37 mbar. (Min:25 mbar, Max 45 mbar)
Alternative where permitted 50 mbar. (Min:42.5 mbar, Max: 57.5 mbar)
Burner Pressure mbar 31.0 31.1 26.3 26.0 23.5 26.0 26.1
Gas Rate m3/h 1.8 2.3 2.6 3.5 4.1 4.4 5.0
kg3/h 3.3 4.3 4.8 6.5 7. 6 8.1 9.3
litres/h 6.9 8.9 10.0 13.5 15.8 16.9 19.3
Gas Connection
ELUA, B, C, D R - ½” R - ½” R - ½” R - ¾” R - ¾” R - ¾” R - ¾”

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Heater Installation
SECTION 6
WARNING
Crush Hazard
Use 10 mm steel drop rod minimum.
Failure of the supports can result in death,
injury or property damage.
WARNING
6.1 General
Heaters are designed for installation above 2.5m. These heaters must
be installed within the heated space. Duct delivery systems are not
permitted with axial fans. When handling or supporting the heater from
below, ensure that the weight is taken at the support points.
6.2 Basic Information.
ELU heaters have automatic ignition burners for ON/OFF operation only.
6.3 Location and Suspension
All models:
* Must be installed indoors
* Must be installed in a level position
* May be mounted on a shelf of non- combustible material (see
page 12 figure 5) or from wall brackets of suicient strength to
support the heater as listed in the Dimension Data Tables on page
7 & 8, Section 5.1 and Page 8, Section 5.2. for support points).
Drop rods must be a minimum of 10 mm diameter mild steel. Four
suspension points (M10 nuts) are located on top of the heater.
* Must be installed in a manner which allows the hinged door to be
fully opened to provide access to all serviceable components.
6.4 Handling
All ELU heaters are supplied secured to a pallet and shrink wrapped.
Use the pallet to support the heater during handling and installation.
When handling or supporting the heater from below, ensure that the
weight is taken at the support points.
For typical suspension methods See page 12, Figure 4. The gas or
electrical supply lines must not be used to support the heater.
Do not locate the gas or electric supply lines directly over the path of
the flue products from the heater.
The heater must be installed in a location that is readily accessible for
servicing.
The heater must be installed in accordance with clearances to
combustibles as indicated on the wall tag and in this manual.
6.6 Wall Mounting
Where wall mounting barckets are to be used, any bracket system to be
installed must be of suitable design to adequately carry the weights of
the heater. See Pages 7 and 8, Sections 5.1 Page 7 and section 5.2, Page
8 for weights and dimensions.
Any mounting brackets utilised must be installed using beat building
practices.
6.5 Suspension and Shelf Mounting

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Figure 4: Suspension Methods
Figure 5: Shelf-Mounting Methods

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WARNING
Fire Hazard
Keep all flammable objects, liquids and
vapors the minimum required clearances to
combustibles away from equipment.
Some objects will catch fire or explode when
placed close to equipment.
Failure to follow these instructions can result
in death, injury or property damage.
WARNING
Cut/Pinch Hazard
Wear protective gear during installation,
operation and service.
Edges are sharp.
Failure to follow these instructions can result
in injury.
Flue Installation
SECTION 7
WARNING
Carbon Monoxide Hazard
Heater must be flued to outside.
Heater must be installed according to the
installation manual.
Failure to follow these instructions can result
in death or injury.
WARNING
Figure 6: Flue and Roof Detail (Representational)
The flue must terminate outside of the building. Flues and air intakes
must be a fully sealed system and correctly sized for the model. Flues
should be assembled as detailed on Page 14, Figure 7 through Page
16, Figure. The joints between the flue terminal and the roof or wall
must be properly sealed. If the flue passes through a wall or ceiling
of combustible material, it must be enclosed by a sleeve of non-
combustible material and be separated from the sleeve by at least a
25mm air gap.
Flues and air intakes must be adequately supported so that the heater
does not bear the weight of the pipes.
For flue termination See Page 14, Figure 7 and 8.
7.2 Type C12, C32 & C62 Appliance Room Sealed
The heaters are designed to be installed as room sealed appliances. The
flue and air intake are run as separate pipes to the special concentric
wall or roof terminal See Page 14, Figure 8. The wire mesh should
be fitted inside the the fresh air adapter on the heater and must be
removed prior to installation.
7.3 Type B22 Appliance
The flue must terminate outside the building and be fitted with a low
resistance terminal See Page 14, Figure 7.
7.1 Flue Installation

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Model Concentric Diameter Wall Thickness
Dim"A"
40-60 150 mm 335 mm
75 -115 200mm 420 mm
Figure 7: Vertical and Horizontal Flue Termination
Type B22 Appliance
Figure 8: Vertical and Horizontal Flue Termination Type C12 , C32 & C62 Appliances

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Air Supply
SECTION 8
8.1 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 fan(s).
8.2 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 regulations.
8.2.1 Heaters Installed Within the Heated Space
Where the volume of the heated space is greater than 4.7m3 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.
For a building having an air change rate less than 0.5/h, ventilation
will be will be necessary in accordance with local and national codes.
Ventilation direct to outside must be provided as follows:
Heaters up to 70kW heat input: 5.0cm per kW of rated heat input.
Heaters above 70kW heat input: 350cm + 2.5cm per kW of rated heat
input above 70kW.
8.3 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 8.2.1 and local
and national regulations.
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.
8.4 Isolated Equipment Rooms
Ventilation must prevent the isolated equipment room temperature from
exceeding 32C as well as prevent any negative air pressure within the
room. See Page 15, Figure 9. Any isolated equipment room containing
air heaters will require permanent air vents direct to outside air in
compliance with local regulations.
Where natural ventilation is used, suitable permanent openings at low
and high level, communicating directly with the outside air, must be
provided.
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.
Figure 9: Heaters Installed In Isolated Equipment Rooms