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Roberts Gorden COMBAT CTU 22 TO 115 User's Manual

1. LNE Le a e REMOTE LOCKOUT RESET o IIF GROUND 4 Q REMOTE LOCKOUT INDICATION N If any of the original wire supplied with the heater must be replaced it must be replaced with wiring material having a temperature rating of at least 105 C and 600 volts a ou SECTION 10 WIRING AND ELECTRICAL INFORMATION 10 10 CTUD External Motor Alternative Wiring amp Optional Thermostat Time Switch Single Phase Motor Three Phase Motor N L 1 2 3 with Load over 7 Amps N ILI112 3 Room Room Thermostat Thermostat 2A c Y e Frost Thermostat Frost Thermostat 230 V 50 Hz Time Switch 230 V 50 Hz Time Switch Contactor or Relay Single Phase Motor T with Load Over 7 Amps INL 400 VY 3 Overload protection must motor 230 V 50 Hz be provided at the motor supply or contactor Overload protection must be provided at the motor RDW 1565 or contactor N Lu Lo L3 400 V 50 Hz 3 Y Supply Contactor or Relay 23 COMBAT CTU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL SECTION 11 COMMISSIONING Installation service commissioning and annual inspection of the heater must be done by a contractor qualified in the installation and service of gas fired heating equipment Read th
2. 39 COMBAT CTU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL 16 6 Ignition Control IT IS IMPORTANT THAT ONLY THE CORRECT IGNITION CONTROL SPECIFIED FOR EACH MODEL TYPE IS USED WHEN REPLACING THESE ITEMS 16 6 1 S4565C Models 22 to 60 This control plugs onto the gas valve Pull out 12 pin electrical connection Pull out ignition cable and flame probe cable noting their positions Release screw securing control to gas valve Refit in reverse Ensure correct location of ignition and flame probe cables Ensure that the earth connection is made directly to the earth point on the gas valve 16 6 2 S4563C Models 75 to 115 This control is mounted at the electrical mounting plate Pull out the 3 cable connectors Pull out ignition cable ignition earth and flame probe cable noting their positions Remove the screws Refit in reverse Ensure correct location of ignition and flame probe cables 16 7 CTUA Axial Fan Guard Motor Assembly The axial fan unit for the CTUA heater is supplied completely assembled and balanced 16 7 1 Fan Removal and Replacement Remove the four screws and rubber washers Part Number 90710418 90710419 Description Axial Fan 16 in Axial Fan 500 mm 16 7 2 To Replace the Fan Assembly To replace the fan assembly reverse the procedure shown above Fit rubber washers to the guard mountings to reduce vibration 40 e Check that the fan blades are free to r
3. Return Air Duct from Heated Space or Fresh Air from Outside Max Temperature 32 C N ya Room Air Pressure Must Not be Negative Wall Low Level Ventilation E SECTION 8 OPTIONAL HEATER CONFIGURATIONS SECTION 8 OPTIONAL HEATER CONFIGURATIONS 8 1 Distribution Duct Work for CTUB CTUC and CTUD Heaters CTUC heaters have the fans enclosed so that the heater may be connected to inlet ducting CTUD heaters are supplied with inlet and outlet duct spigots for mounting the heater into a customer designed duct system for use with an external fan system It is recommended that flexible duct connectors are used to reduce duct born noises When installing CTUD heaters onto ducting force the fan to run Do not rely on the fan thermostat to turn it on Any such device must be in parallel with the fan thermostat so that the fan run on operation will still operate Contact Roberts Gordon Europe Ltd Design Department for recommendations regarding duct resistance and design Tel 44 0 121 506 7700 Figure 8 Ducting NOTE Duct size will be full size of inlet and outlet All joints between the heater and duct work should be made as air tight as possible Airflow Indicator ie hd Twice u Dimension Xx A y 8 1 1 CTUD Heaters For CTUD heaters it is essential th
4. 24 352 352 433 43 3 54 3 54 3 mm 610 610 610 610 895 895 1100 1100 1431 1431 M CTUC Height in 24 24 24 24 35 2 35 2 433 433 56 3 56 3 N Inlet amp Outlet Duct mm 534 534 534 534 817 817 1024 1024 1233 1233 Spigot Height in 21 21 21 21 32 32 40 3 40 3 48 5 48 5 p inlet amp Outlet Duct mm 709 709 709 709 707 707 888 888 888 888 Spigot Width in 27 9 27 9 27 9 27 9 27 8 27 8 35 35 35 35 Weight CTUB kg 96 96 100 104 139 146 185 210 228 237 kg 109 109 113 117 157 163 206 215 251 260 Weight CTUD kg 93 93 97 101 124 131 172 181 200 209 NOTE Inlet and outlet duct spigot fitted with 30 mm flange 6 SECTION 4 SPECIFICATIONS 4 3 General Technical Data Table CTU 22 CTU 30 CTU 35 CTU 40 CTU 50 CTU 60 CTU 75 CTU 90 CTU 100 CTU 115 CTUA With Axial Fan Total Electrical Load W 210 210 210 210 415 415 510 510 745 745 Run Current A 1 0 1 0 1 0 1 0 1 72 1 72 1 9 1 9 3 2 3 2 Start Current A 1 4 1 4 1 4 1 4 2 4 2 4 2 8 2 8 4 5 4 5 Air Flow m h 3800 4000 4000 4000 5500 5500 7500 7500 11 000 11 000 Sound Pressure Level NR 51 51 51 51 52 1 52 1 52 3 52 3 52 3 52 3 at 3m dB A 56 56 56 56 571 57 1 57 3 57 3 57 3 57 3 CTUB with Centrifugal Fan and CTUC Range with Centrifugal Fan and Duct Inlet Total Electrical Load
5. 31 SECTION 15 Troubleshooting ssccsscsseeeeeseeeeeeeseenees 32 151 Generali adi 32 15 2 Troubleshooting For Automatic Ignition Burner SYSTOMS TT 33 15 3 Troubleshooting for Flame Supervision System 34 15 4 Troubleshooting for Solenoid Valves 34 SECTION 16 Removal and Replacement Partis 35 16 1 Gas Vae 35 16 2 Burner Compartment sees eee eee ee eee ee ee e 36 16 3 Ignition Electrode and Flame Probe 37 hla 38 16 5 Pressure SWwWICh eee ee eee 39 16 6 Ignition Control 0 2 sese ee eee ee eee 40 16 7 CTUA Axial Fan Guard Motor Assembly 40 16 8 CTUB amp CTUC Centrifugal Fan Guard Motor L Tl sU 40 16 9 Fan ST 41 O 2007 Roberts Gordon LLC 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 systems without the written permission of Roberts Gordon LLC Printed in U K TABLE OF FIGURES Figure 1 Installation Clearances and Clearances to Combustibles T 4 Figure 2 Suspension Methods csccesseeeeeeeeeeeneeeeeeeneetens 9 Figure 3 Flue and Roof Detail sss sees eee 10 Figure 4 Air Intake Terminal Cover sss ee eee eee 10 Figure 5 Vertical and Horizontal Flue Termination Type Bao Appliance sese eee eee eee
6. RED CENTRIFUGAL FAN 2 l poo GREENYELLOW q 2 WHITE N HIGH BLACK MEDIUM BLUE 4 LOW RED GREEN YELLOW WHITE N HIGH BLACK 4 r MEDIUM BLUE LOW RED CENTRIFUGAL FAN 1 s 6 Da oh fo RELAY PRESSURE SWITCH ee LOCKOUT RESET Pressure Switch Detail NOTE Unused speed setting wires for the centrifugal fan must be isolated and insulated If any of the original wire supplied with the heater must be replaced it must be replaced with wiring material having a temperature rating of at least 105 C and 600 volts To SITE WIRING allele ll alalaiale N P Le__e REMOTE FAN ON __ THERMOSTAT n L ba aa ae 2 REMOTE LOCKOUT RESET I GROUND lt NEUTRAL z Sa UNE amp REMOTE LOCKOUT INDICATION al N 69 L lt SECTION 10 WIRING AND ELECTRICAL INFORMATION 10 8 CTUD Wiring Diagram Models 22 60 IGNITION MODULE COUT UU OOo OoO anal 0 0 0 0 0 0 0 Time Delay Relay PURPLE GREY Thermostat Limit GAS VALVE Thermodisc N C E LOCKOUT RESET RED RED BROWN 6 PRESSURE SWITCH Pressure Switch Detail GREEN YELLOW gt a me BLUE BROWN COMBUS
7. are compatible COMBAT CTU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL SECTION 1 HEATER SAFETY 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 heater must be done by a registered installer contractor qualified in the installation and service of gas fired heating equipment Read this manual carefully before installation operation or service of this equipment This heater is designed for heating 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 venting etc must be thoroughly understood before proceeding with the installation SECTION 2 INSTALLER RESPONSIBILITY e To install the heater as well as the gas and elec trical supplies in accordance with applicable specifications and codes Roberts Gordon recommends the installer contact a local building inspector Fire Officer or insurance company for guidance To use the information given in the manual together with the local and national codes to perform the installation To install the heater in accordance with the Clearances to Combustibles of this heater To furnish all needed materia
8. heater See Page 5 Section 4 1 or the remote reset if installed on site 12 4 Lighting Instructions 12 4 1 To Turn On Heater 1 Ensure that the electrical and gas supplies to the heater are on Check that the on site controls are ON NOTE The thermostat setting must be above the ambient temperature for the heater to operate 2 The green light will be on and the automatic fir ing sequence will begin as described on Page 25 Figure 10 The heater will now operate auto matically under the control of the on site con trols Following long shut down periods the control may go to lockout See Page 28 Sec tion 12 3 2 12 4 2 To Turn the Heater Off Set the installed remote controls to the OFF position The burner will turn off immediately The fan will continue to run for a few minutes To restart turn the control used above to ON 12 5 Simple Fault Finding Some possible reasons for the heater not operating are 1 Gas supply not turned ON 2 Electricity supply not turned ON 3 The time and or temperature controls are not ON 4 The thermostat limit thermodisc may have operated This may be caused by an interrup tion of the electrical supply or failure of the distribution fan If the thermostat limit thermodisc persistently operates there is a fault which must be investigated by a contractor qualified in the installation and service of gas fired heating equipment 12 5 1 Simple Fault Findi
9. 1 10 9 CTUD Wiring Diagram Models 75 115 22 10 10 CTUD External Motor Alternative Wiring amp Optional Thermostat Time Switch see ee eee 23 SECTION 11 Commissioning uzrrsurreannnennnannnnannnennnnnnnn 24 11 1 Pre Commission Checker eee 24 Ee Tais 24 11 3 Mechanical Checa 24 11 4 Begin Commissioning sese sees eee eee eee eee eee 24 11 5 Combustion Testing sese eee eee ee eee 26 11 6 Turning Off the Heater sese eee eee eee 26 11 7 External Controls sese 27 11 8 Complete the Commissioning ee 27 11 9 Instruction to the User sese eee eee eee eee eee 27 SECTION 12 User Instructions nesssansnennnennnnnnnnnnnnnnnnnnn 28 12 1 User INStructions circa ei 28 12 2 Heater Operaion sese ee ee eee 28 12 3 Common User Controls sss sees eee eee 28 12 4 Lighting Instructions sss sese eeeeeeteeeeeneeeteneereneeees 28 12 5 Simple Fault EInding sss sese ee ee eee eee 29 SECTION 13 Servicing cssescsecesseesseesseessseesseeeeseesseeeseeees 30 13 1 Servicing INStrUCtIONS e eee eee eee eee eee e 30 13 2 Burner Maintenance eee eee eee 30 13 3 Fan Motor Assembly Maintenance sees ee eee 30 13 4 Heat Exchanger Maintenance sese eee eee eee eee 30 13 5 Gas Control Valve Maintenance eee ee eee 30 13 6 Fl e T 30 SECTION 14 Conversion Between Gases uunsannnennnnnnnnnn 31 1431 General inician ea 31 14 2 Burner Conversion sese eee eee 31 14 3 Gas Valves eee
10. 11 Figure 6 Vertical and Horizontal Flue Termination Type C12 Cas amp Ces Appliances ccceceeessreeeees 11 Figure 7 Heaters Installed in Isolated Equipment Rooms 12 Fig re 8 Reas tiie 13 Figure 9 Gas Connection with Stainless Steel Flex GONME CON eins ae eee de 14 Figure 10 Automatic Burner Control Box Sequence 25 Figure 11 Gas Valve for Heater Models 22 60 25 Figure 12 Gas Valve for Heater Models 75 115 26 Figure 13 Heater Operating Sequence see ee eee ee eee 28 Figure 14 Centrifugal Fan Orientation sese eee ee eee 41 Product Approval ROBERTS GORDON 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 on natural gas and LPG when installed commissioned and maintained in accordance with these instructions These instructions refer to appliances designed to operate in the European Union Appliances designed for other countries Non European Union are available on request This appliance must be installed in accordance with the local and national codes in force and used only in a sufficiently ventilated space as specified in these instructions Before installation check that the local gas distribution systems nature of gas and pressure and adjustment of the appliance
11. 110 5 152 4 Plate in Y 1 875 2 09 2 39 2 72 2 39 2 75 3 82 4 08 4 35 6 RG P N 11011139 1101138 1101140 11011137 11011136 11011135 11011134 11011133 11011132 11011131 IT IS IMPORTANT THAT ONLY THE CORRECT FLUE FAN SPECIFIED FOR EACH MODEL TYPE IS USED WHEN REPLACING THESE ITEMS Carry out a commission after working on or changing a flue fan See Page 28 Section 12 38 16 5 Pressure Switch Pull off 3 way connector Spring open plastic clips of mounting cradle Replace with correct type of pressure switch for model The pressure switches are colour coded for each pressure setting A WARNING Carbon Monoxide Hazard Use correct pressure switch specified for each model Use of incorrect pressure switch could cause unsafe condition Failure to follow these instructions can result in death or serious injury Carry out a commission after working on or changing a pressure switch See Page 24 Section 11 SECTION 16 REMOVAL AND REPLACEMENT PARTS CTU 22 CTU 30 CTU 35 CTU 40 CTU 50 CTU 60 CTU 75 CTU 90 CTU 100 CTU 115 RG P N 90439801 90439810 90439804 90439803 90439810 90439802 90439811 90439807 90439811 90439807 Colour pink grey white grey grey yellow grey brown grey brown Code Set Point 0 57 0 92 1 17 1 02 0 87 0 80 1 79 1 69 1 79 1 69 mbar in wc 0 23 0 37 0 47 0 41 0 35 0 32 0 72 0 68 0 72 0 68
12. 17 Natural Gas G20 and G25 Injector size mm 2 08 2 25 2 25 2 25 2 25 2 25 2 71 2 71 2 71 2 71 in 0 0819 0 0886 0 0886 0 0886 0 0886 0 0886 0 1067 0 1067 0 1067 0 1067 Marking 45 225 225 225 225 225 36 36 36 36 RG P N 91930045 91930225 91930225 91930225 91930225 91930225 91930036 91930036 91930036 91930036 LPG Gas Propane G31 and LPG Gas Butane G30 Injector size mm 1 25 1 40 1 40 1 40 1 40 1 35 1 51 1 51 1 51 1 51 in 0 0492 0 0551 0 0551 0 0551 0 0551 0 0531 0 0594 0 0594 0 0594 0 0594 Marking 125 54 54 54 54 135 53 53 53 53 RG P N 91930125 91930054 91930054 91930054 91930054 91930135 91930053 91930053 91930053 91930053 36 SECTION 16 REMOVAL AND REPLACEMENT PARTS 16 3 Ignition Electrode and Flame Probe Thermostat Limit Thermodisc Flame Remove all i Probe burner compartment gt screws to remove the burner compartment and access the Front View Burner Compartment Front Views Electrode Ignition Electrode E To replace the ignition electrode or flame probe remove the electrical lead and screw Pull out from mounting Refit in reverse ensuring that the gap to burn
13. 17 AIF intake mee Flue Horizontal 4 Option Manifold The minimum Max wall thickness gap must be 35 mm positioned at bottom COMBAT CTU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL SECTION 7 AIR SUPPLY 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 fan s 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 11 Figure 5 7 2 1 Heaters Installed Within the Heated Space Where the volume of the heated space is greater than 4 7 m 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 necessary in accordance with local and national codes Ventilation direct to outside must be provided as follows e Heaters up to 70 kW heat input 5 0 cm per kW of rated heat input e Heaters above 70 kW heat input 350 cm 2 5 cm per kW of rated he
14. 225 Centre of Flue Air Intake m 65 65 55 65 G5 5 89 89 89 89 H R mm 218 218 218 218 211 211 260 260 260 260 Epsilon an File in 86 86 86 86 83 8 3 102 102 102 10 2 3 mm 150 150 150 150 150 150 220 220 220 220 Ces o an im 6 69 6 16916 69 en en en 87 PN qa mm 756 756 756 756 806 806 756 756 806 806 g in 29 8 29 8 29 8 29 8 31 8 31 8 29 8 29 8 81 8 31 8 mmo 100 100 100 100 100 100 130 130 130 130 n 3 9 3 9 3 9 3 9 3 9 3 9 5 1 5 1 5 1 5 1 Weight kg 84 84 88 92 115 122 160 169 194 203 COMBAT CTU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL 4 2 CTUB CTUC and CTUD End View End View CTUB C All Models CTUC All Models 1 H HH H F HH HH H HH H HE H T L End View Front View CTUD All Models CTUD And other models fitted with air outlet spigots Dimension Data CTUB CTUC and CTUD Model 22 30 35 40 50 60 75 90 100 115 A mm 1026 1026 1026 1026 1026 1026 1076 1076 1076 1076 p in 40 4 40 4 40 4 40 4 40 4 404 424 424 424 424 ee mm 610 610 610 610 895 895 1100 1100 1380 1380 0 in 24 24 24
15. 5A CTUB 8 CTUC Models 22 50 10A CTUB 8 CTUC Models 75 115 20A CTUD heaters must have the external fan or its control connected to Terminal 1 so that the fan run on function at close down operates correctly A WARNING Electrical Shock Hazard Disconnect electrical power before servicing Failure to follow these instructions can result in death or electrical shock 10 2 Remote Controls The heater is designed to be operated by controls installed remote from the heater See Page 16 Section 10 3 through Page 17 Section 10 4 10 2 1 Burner Controls Thermostat Controls to operate the burner must be voltage free contacts connected between terminals 2 amp 3 of the main terminal block 10 2 2 Positioning Room Thermostats or ROBERTS GORDON Control A room thermostat or ROBERTS GORDON control should be mounted on a wall or column at a height of approximately 1 5 metres from the floor to measure the ambient temperature It should be clear of both cold draughts and the direct path of warm air from the heater 10 2 3 Remote Frost Thermostat When required connect to terminals 2 and 3 in the main terminal block Locate within the heated space adjacent to the most vulnerable equipment that requires protection See Page 16 Section 10 3 through Page 17 Section 10 4 10 2 4 Remote Fan Controls The fan will operate automatically providing there is a constant 230 V supply to t
16. C 3 seconds alternate 5 seconds S4565C 5 seconds If at any stage the flame fails the control will go to lockout The red light will illuminate and the control will need to be manually reset before any further start attempt can be made Figure 11 Gas Valve for Heater Models 22 60 End View Fixing Screw Ignition A Ignition Control Output lt Plugs into Gas Valve Flame Probe Connection 12 Cable Connector Outlet Pressure Inlet Pressure Gas Inlet 25 COMBAT CTU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL Figure 12 Gas Valve for Heater Models 75 115 Plug for Main Gas Valve Outlet Pressure 11 4 2 Commissioning the Gas Valves all gases 11 4 2 1 Check Burner Gas Pressure 1 Loosen the screw cover of the outlet burner pressure test point and connect a manometer 2 With the burner firing measure the pressure on the manometer To adjust the burner pressure remove the regulator cover from the valve and turn the regulator adjustment screw to set the required burner pressure as stated in the Tech nical Data Tables for the correct gas and model on Page 8 Section 4 4 NOTE If the correct burner pressure cannot be reached then check the inlet pressure to the valve with the burner firing See Technical Data Tables on Page 8 Section 4 4 for inlet pressure requirement Do not continue to adjust the regulator if the pressure is not changing If the inlet pressure i
17. FAN SITE WIRING DM D o oo Oo So 3 Yo 3 Vo 3 IGNITION MODULE Plug in Connection to Gas Valve E _w Honeywell S4565C 1017 Control Xx G 5 a IGNITION Le__e REMOTE FAN ON gt THERMOSTAT v l Q REMOTE LOCKOUT INDICATION a UNE L S e REMOTE LOCKOUT RESET o i GROUND O 425 8 NEUTRAL lt lt NOTE Unused speed setting wires for the centrifugal fan must be isolated and insulated If any of the original wire supplied with the heater must be replaced it must be replaced with wiring material having a temperature rating of at least 105 C and 600 volts a oN oag TOQ N COMBAT CTU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL 10 7 CTUB C Wiring Diagram Models 75 115 o 95 IGNITION GREEN YELLOW Time Delay Relay S 4563 C Honeywell L PURPLE BLUE LOCKOUT z 9 3 E pu zZ U wW 4 oO COMBUSTION FAN YELLOW MAINS FILTER Thermostat Limit i CENTRIFUGAL FAN 3 Thermodisc N C models 100 115 only GREEN YELLOW WHITE N HIGH BLACK MEDIUM BLUE LOW
18. FOR YOUR SAFETY If you smell gas Open windows DO NOT try to light any appliance DO NOT use electrical switches DO NOT use any telephone in your building Leave the building Immediately call your local gas supplier after leaving the building Follow the gas supplier s instructions If you cannot reach your gas supplier call the Fire Department A WARNING Fire Hazard Do not store or use petrol or other flammable vapours and liquids in the vicinity of this or any other appliance 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 A 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 Quality in Any Language Copyright 2007 Roberts Gordon LLC ROBERTS GORDON Combat Tubular Unit Heaters Installation Commissioning Operation amp Service Manual Model CTU 22 to 115 25 S Cr Br 25 da SOO um run Installer Please take the time to read and understand these instructions prior to any installation Inst
19. ION 5 Heater Installation uusnsnsnennnsannnannnnnnnnannnen 9 5 1 General 9 5 2 Handling u a ee ened es 9 5 3 Shelf Mounting and Suspension 9 SECTION 6 Flue Installation unssnsnsnsnnnnennnnnnnnannnennnnnnnn 10 6 1 Flue Installation sese eee eee eee eee 10 6 2 Type Cs Cas amp Cas Appliance sse 10 6 3 Type Bao AppIIanCe sese 10 SECTION 7 Air SUpply ssccssecsseesseeeseeesseeeeeeeseeeseeenseeseeets 12 7 1 Room Sealed Installation sese eee eee eee 12 7 2 Open Flued Installation sese sees ee eee eee 12 7 3 Building Ventilation ss sees eee eee eee eee eee 12 74 Isolated Equipment Rooms sees eee eee eee eee 12 SECTION 8 Optional Heater Configurations 00008 13 8 1 Distribution Duct Work for CTUB CTUC and CTUD Healer ica an eee 13 SECTION 9 Gas Piping csscssecsseesseesseesseeeseeeseneeseeneees 14 9 1 Connect seven ae nn 14 SECTION 10 Wiring and Electrical Information 15 10 1 Electrical Supply ncnio 15 10 2 Remote Controls ur20erssennneennnnnnnensnnennnnnnnnnn nn 15 10 3 CTUA Wiring Diagram Models 22 60 16 10 4 CTUA Wiring Diagram Models 75 115 17 10 5 CTUB C Wiring Diagram Models 22 40 18 10 6 CTUB C Wiring Diagram Models 50 60 19 10 7 CTUB C Wiring Diagram Models 75 115 20 10 8 CTUD Wiring Diagram Models 22 60 2
20. N 10 WIRING AND ELECTRICAL INFORMATION 10 4 CTUA Wiring Diagram Models 75 115 IGNITION GREEN YELLOW S 4563 C Honeywell Time Delay Relay Thermostat Limit Thermodisc N C Fr PURPLE AXIAL FAN MAINS FILTER LOCKOUT 9 z 2 que w 22 Pag AXIAL FAN BLUE BROWN GREEN YELLOW COMBUSTION FAN YELLOW PRESSURE SWITCH NO P 3 YELLOW a LOCKOUT RESET SITE WIRING Vo Q Yo Qo 4 Pressure Switch Detail Le__e REMOTE FAN ON 6__0 THERMOSTAT v Mi II ss e E T r Se e LINES Ra a a REMOTE LOCKOUT INDICATION LS E e REMOTE LOCKOUT RESET o NOTE If any of the original wire supplied with the heater must be replaced it must be replaced with wiring material having a temperature rating of at least 105 C and 600 volts COMBAT CTU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL 10 5 CTUB C Wiring Diagram Models 22 40 IGNITION MODULE Time Delay Relay Thermostat Limit Thermodisc N C GAS VALVE BROWN GREEN YELLOW
21. ND SERVICE MANUAL 4 4 Technical Data Table Appliance Category II 2H 3B P CTU 22 CTU 30 CTU 35 CTU 40 CTU 50 CTU 60 CTU 75 CTU 90 CTU 100 CTU 115 Heat Input kW 27 33 39 48 61 70 95 111 119 134 Gross CV Btu h x 1000 93 113 133 163 210 238 324 378 405 459 Heat Input kW 25 30 35 43 55 63 86 100 107 121 Net CV Btu h x 1000 84 102 119 147 189 215 292 341 365 414 Approximate kW 23 27 32 39 51 58 78 91 98 111 Heat Output Btu h x 1000 78 92 109 133 174 198 266 310 334 379 Thermostat Limit Thermodisc CTUA B C D C 75 75 75 75 75 75 75 75 75 75 Natural Gas G20 Data Inlet Pressure 20 mbar 7 8 in WG Min 17 mbar 6 8 in WG Max 25 mbar 10 in WG Burner Pressure mbar 8 3 8 7 8 5 9 4 9 3 8 5 6 1 6 0 6 2 6 3 m h 2 6 3 2 3 7 4 5 5 8 6 6 9 0 10 5 11 3 12 8 Gas Rate ft h 92 112 131 160 206 234 319 371 398 451 Natural Gas G25 Data Inlet Pressure 25 mbar 10 in WG Min 20 mbar 7 8 in WG Max 30 mbar 12 in WG Burner Pressure mbar 12 2 12 7 12 5 14 0 13 6 13 2 9 2 9 3 9 2 10 2 m h 3 03 3 33 4 31 4 78 6 14 6 98 9 49 11 06 11 86 13 43 Gas Rate ft8 h 107 117 152 169 217 247 335 391 419 474 LPG Gas Propane G31 Data Inlet Pressure 37 mbar 14 6 WG Min 25 mbar 10 in WG Max 45 mbar 18 in WG Alternative where permitted 50 mbar 20 in WG Min 42 5 bar 17 in WG Max 57 5 mbar 23 in WG Burner Pres
22. Operating TROUBLESHOOT ENDS N Use 15 2 to test burner Installation Code and Annual Inspections All installations and service of ROBERTS GORDON equipment must be performed by a contractor qualified in the installation and service of equipment sold and supplied by Roberts Gordon and conform to all requirements set forth in the ROBERTS GORDON manuals and all applicable governmental authorities pertaining to the installation service and operation of the equipment To help facilitate optimum performance and safety Roberts Gordon recommends that a qualified contractor annually inspect your ROBERTS GORDON equipment and perform service where necessary using only replacement parts sold and supplied by Roberts Gordon Check for mis wiring For your safety and optimum heater performance use only ROBERTS GORDON replacement parts Conduct Commissioning procedure as shown on Page 24 Section 11 32 15 2 Troubleshooting For Automatic Ignition Burner Systems SECTION 15 TROUBLESHOOTING There are two burner controls used Honeywell S4563C and YN WARNING S4565C They both have similar operating sequences To measure flame current connect a O 50 yA DC meter in series with the flame probe If the meter reads negative values then reverse the test leads Electrical Shock Hazard Start Are gas amp electrical supplies on Turn on supplies Has the thermostat limit thermod
23. RTS GORDON e Set all fans to operate at the same speed replacement parts The three speed winding connections are Low speed White N Red Live The other two windings are parked separately in spare terminals Medium speed White N Blue live The other two windings are parked separately in spare terminals High speed White N Black live The other two windings are parked separately in spare terminals e Check that the fan blades are free to rotate without catching before turning on the power to the fan Figure 14 Centrifugal Fan Orientation CTUB C 22 40 CTUB C 50 90 CTUB C 100 115 16 9 Fan Data CTU 22 CTU 30 CTU 40 CTU 50 CTU 60 CTU 75 CTU 90 CTU 100 CTU 115 Axial Fan Type EBM EBM EBM Ma Vib Ma Vib EBM EBM Ma Vib Ma Vib CTUA Models S4E420 S4E420 S4E420 Vo2 C100 VO2 C100 S4E420 S4E420 Vo2 C100 VO2 C100 AA06 02 AA06 02 AA06 02 AA06 02 AA06 02 RG P N 90710418 90710418 90710418 90710419 90710419 90710418 90710418 90710419 90710419 Quantity 1 1 1 1 1 2 2 2 2 Fan Rating 160 160 160 370 370 160 160 370 370 Watts per Fan Centrifugal Fan Type Torin Torin Torin Torin Torin Torin Torin Torin Torin CTUB C Models 241 241 241 241 241 241 241 241 241 241 270 270 270 270 270 270 270 270 RG P N A049 A049 A049 A049 A049 A047 A047 A047 A047 Quantity 1 1 1 2 2 2 2 3 3 Normal Fan Rating W 1100 1100 1100 1100 1100 1200 1200 1200 1200 High Fan Rat
24. TION FAN MAINS FILTER LOCKOUT SITE WIRING Rae SEELE Yo 7 O VD V IGNITION MODULE Plug in Connection to Gas Valve Honeywell S4565C 1017 Control IGNITION THERMOSTAT M L 62 REMOTE LOCKOUT RESET NEUTRAL z Q REMOTE LOCKOUT INDICATION IH GROUND NOTE For external fan wiring See Page 23 Section 10 10 If any of the original wire supplied with the heater must be replaced it must be replaced with wiring material having a temperature rating of at least 105 C and 600 volts COMBAT CTU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL 10 9 CTUD Wiring Diagram Models 75 115 IGNITION GREEN YELLOW S 4563 C Honeywell Time Delay Relay Thermostat Limit Thermodisc N C L PURPLE Y BLUE MAINS FILTER LOCKOUT o 3 u zZ u m iva o BLACK YELLOW COMBUSTION FAN PRESSURE SWITCH E EA m AA 2 wirinc Pressure Switch 2 Detail r NOTE For external fan wiring See Page 23 Section 10 10 NEUTRAL 2
25. W 550 550 550 550 1100 1100 1100 1100 1650 1650 Normal Run Current A 4 6 4 6 4 6 4 6 11 0 11 0 11 0 11 0 15 6 15 6 Normal Start Current A 9 0 9 0 9 0 9 0 13 5 13 5 13 5 13 5 19 2 19 2 Normal Speed Medium Medium Medium Medium Medium Medium Medium Medium Medium Medium High Run Current A 5 5 5 5 5 5 5 5 14 0 14 0 14 0 14 0 21 0 21 0 High Start Current A 13 6 13 6 13 6 13 6 17 2 17 2 17 2 17 2 25 8 25 8 Air Flow m h 3300 3300 3300 3300 5500 5500 6400 6400 9400 9400 Sound Pressure Level NR 59 59 59 59 61 61 62 62 63 63 at3m dB A 59 5 59 5 59 5 59 5 61 5 61 5 61 8 61 8 64 2 64 2 CTUD Duct Heater with No Fan Minimun Air Flow Required m h 3300 3300 3300 3300 5500 5500 6400 6400 9400 9400 Pressure Loss Across Heat Exchanger Pa 30 30 30 30 30 30 30 30 30 30 Flue and Alr Intake Flue and Air Intake Size mm Y 100 100 100 100 100 100 130 130 130 130 Maximum Straight Flue Air Intake m 7 8 8 10 13 15 15 17 20 20 Electrical load at 230 V 50 Hz measured by calculating from total run current of appliance Do not exceed the maximum length of flue stated or heater may not operate properly Reduce the maximum length stated by 1 m for each 90 bend installed If minimum air flow requirements are not met then temperature limit devices will shut down the heater COMBAT CTU UNIT HEATERS INSTALLATION OPERATION A
26. WHITE N HIGH BLACK LOCKOUT MEDIUM BLUE RESET LOW RED CENTRIFUGAL FAN PRESSURE SWITCH Pressure Switch Detail GREEN YELLOW MAINS FILTER LOCKOUT ARAA OLI SITE WIRING oo Fa N I I I I l a lt ao E gt W z l I I I I I I I I I U I U V IGNITION MODULE Plug in Connection to Gas Valve Honeywell S4565C 1017 Control Le REMOTE FAN ON See SS SMNE RS P e THERMOSTAT n L e REMOTE LOCKOUT RESET o Q REMOTE LOCKOUT INDICATION IO N NOTE Unused speed setting wires for the centrifugal fan must be isolated and insulated If any of the original wire supplied with the heater must be replaced it must be replaced with wiring material having a temperature rating of at least 105 C and 600 volts SECTION 10 WIRING AND ELECTRICAL INFORMATION 10 6 CTUB C Wiring Diagram Models 50 60 IGNITION MODULE allo De0 0 0 0 0 0 0 Time Delay Relay BROWN SD Thermostat Limit GAS VALVE Thermodisc N C CENTRIFUGAL FAN 2 GREEN YELLOW WHITE N HIGH BLACK MEDIUM z LOCKOUT RSE RESET H GREEN YELLOW WHITE N HIGH BLACK MEDIUM BLUE LOW RED CENTRIFUGAL FAN 1 WHITE Rep GREEN YELLOW PRESSURE SWITCH Pressure Switch Detail m A 4 5 Aree RELAY BLUE BROWN MAINS FILTER COMBUSTION
27. ace with one of valve turns on correct type Does gas pressure at Valve faulty outlet of valve return to zero or Replace with one of lower when valve turns off correct type If problems persist contact Valve Operating ROBERTS GORDON at TROUBLESHOOT ENDS Tel 44 0 121 506 7709 www rg inc com 34 SECTION 16 REMOVAL AND REPLACEMENT PARTS SECTION 16 REMOVAL AND REPLACEMENT PARTS See warnings and notes on Page 30 Section 13 before removing or replacing parts Burner Components All serviceable burner parts are accessed by the door on the right side of the heater Use a screwdriver to turn the latch 90 See Page 5 Section 4 16 1 Gas Valve Remove the gas supply pipe at the heater inlet 16 1 1 Models 22 60 N ig N Remove gt fixing K Ba screw Disconnect wire harness Unplug control from valve Ignition Control A AA Description Part Number Gas Valve VR4105A 90033403 Ignition Control 90434010 Unplug electrical lead rectifier harness Step 1 Unscrew gas pipe from the J valve inlet p Ignition Control 2 p gt unscrew the fixing screws for Ignition Control 90434020 the inlet and outlet flanges Step 2 Unscrew valve from the Description Part Number burner manifold Gas Valve VR4605 90033404 a 16 1 3 All Models Replace in reverse order Verify tha
28. aller must give a copy of this manual to the owner Owner Keep this manual in a safe place in order to provide your serviceman with necessary information Roberts Gordon Europe Limited Unit A Kings Hill Business Park Darlaston Road Wednesbury West Midlands WS10 7SH UK Telephone 44 0 121 506 7700 Fax 44 0 121 506 7701 Service Telephone 44 0 121 506 7709 Service Fax 44 0 121 506 7702 E mail uksales rg inc com E mail export rg inc com www rg inc com P N X407UK Rev G 10 07 TABLE OF CONTENTS SECTION 1 Heater Safety nuuuunenenennnannnnonnnnnnnnnnnnnnnnnnnnnen 2 SECTION 2 Installer Responsibility ccsscseesseeeees 2 2 1 Clearances to Combustibles sese eee eee eee eee 2 2 2 Corrosive Chemicals sese ee eee eee 2 2 3 National Standards and Applicable Codes 2 SECTION 3 Critical Considerations csccsesseseeeeeees 3 3 1 Basic Information eee eeeeeeeeeeeeseneeeeeeeeeeseeeeseeeeees 3 3 2 Location and Suspension seer ee ee eee eee 3 3 3 Minimum Required Installation Clearances 3 3 4 Clearances to Combustibles sese eee eee eee eee 3 30 Ventilador 3 3 6 Gas SUPPLY eee ee eee 3 3 7 Electrical SUPPIy 2 een 3 9 8 ll aii 3 SECTION 4 Specifications nauunsnsnennnnnnnnannnnnnnnnnnnnnnnnnnnen 5 A R 5 4 2 CTUB CTUC and CTUD sese 6 4 3 General Technical Data Table sse eee ee eee 7 4 4 Technical Data Table sese 8 SECT
29. ance use only ROBERTS GORDON replacement parts Conduct Commissioning procedure as shown on Page 24 Section 11 33 COMBAT CTU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL 15 3 Troubleshooting for Flame Supervision System START Connect a DC ammeter in series with the flame probe Is the green light on and at least 1 pA DC flame current Use section 15 1 to trace the fault Is the connecting lead damaged Is the flame probe damaged or touching earthed components Is there a current flowing in the flame probe circuit with no flame present Yes Is inlet burner gas pressure correct Is live and neutral polarity correct Is flame probe circuit correct Does lockout occur when there is a flame present Yes Repair or replace as necessary If problems persist contact ROBERTS GORDON at Tel 44 0 121 506 7709 www rg inc com Heater Operating TROUBLESHOOT ENDS Repair or replace as necessary Control box faulty Replace with correct type NOTE Minimum flame probe current 1 uA DC Typical flame probe current 3 5 yA DC 15 4 Troubleshooting for Solenoid Valves START Is 230 V at the valve terminals at the Fault elsewhere appropriate time Is gas pressure at inlet of the valve correct for gas type Fault elsewhere Note pressure found Does gas pressure at outlet Valve faulty of the valve rise when Repl
30. at input above 70 kW 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 72 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 CTU heater 7 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 12 Figure 7 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 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 CTU heater Figure 7 Heaters Installed in Isolated Equipment Rooms EA cn Cc cna Ca a a aea eg Tea an an eg SC CC RR Manifold Air Intake a High Level Ventilation _ Duct Distribution System or Discharge to Heated Space
31. at the airflow in the duct system is at least that specified in the Data Sheet on Page 6 Section 4 2 and in the correct direction across the heat exchanger as indicated by the arrow on the heater Higher air flows are permitted but will cause a lower exiting air temperature It is recommended that the fan is positioned to blow the air through the heat exchanger The duct must be designed as described on Page 13 Section 8 1 and Figure 8 to ensure that there is a homogenous air flow across the whole of the heat exchanger Failure to provide a suitable air flow properly distributed across the heat exchanger will reduce the life of the heat exchanger The fan motor or its control must contain a method of overload protection When installed remote from the heater the fan must be supplied via a local electrical isolator positioned and properly labeled to prevent inadvertent operation Dimension x Minimum a Twice Dimension lt lt eine Flexible Flange a COMBAT CTU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL SECTION 9 GAS PIPING 9 1 Connections A WARNING Connect the heater to the gas supply ensuring that the final connections are as follows e Gas supply pipe work is run in medium or heavy gauge tubing in compliance with local and national codes e The gas supply pipe is adequately sized to carry the total volume of gas for the complete Fire Hazard installation Conn
32. e when placed close to heater Keep all flammable objects liquids and vapors the required clearances to combustibles away from heater Failure to follow these instructions can result in death injury or property damage and service of gas fired heating equipment Installation Clearances Roof Terminal Clearances to Combustibles Wall Terminal Heaters may be mounted at a higher level if destratification fans and or turn down nozzles are installed 80 cm is necessary to service heater Roberts Gordon Europe Limited Unit A Kings Hill Business Park Darlaston Road Wednesbury West Midlands WS10 7SH UK Telephone 44 0 121 506 7700 Installation Code and Annual Inspections All installations and service of ROBERTS GORDON equipment must be performed by a contractor qualified in the installation and service of equipment sold and supplied by Roberts Gordon and conform to all requirements set forth in the ROBERTS GORDON manuals and all applicable governmental authorities pertaining to the installation service and operation of the equipment To help facilitate optimum performance and safety Roberts Gordon recommends that a qualified contractor annually inspect your ROBERTS GORDON equipment and perform service where necessary using only replacement parts sold and supplied by Roberts Gordon For installations at elevations above 2000 610 m the appliance shall be derated 4 for each 1000 305 m of e
33. ect gas supply according to Figure 9 e An isolating valve and union connection should be used and fitted into the supply adjacent to the Gas can leak if not installed properly pp y acy heater Failure to follow these instructions can result in death e For suspended heaters use an approved metal injury or property damage flexible connection between the isolating valve and the heater To reduce pressure loss use It is important that the gas supply pipe and the one pipe size larger than the heater gas electrical connections do not support any of the connection heater s weight A gas meter is connected to the service pipe by the IMPORTANT The complete installation must be gas supply company An existing meter shouldbe Purged and tested for gas soundness in accordance checked preferably by the company to ensure that With local and national codes the meter is adequate for the rate of gas supply required Installation pipes must be fitted in accordance with local and national codes Pipe work from the meter to the heater s must be of adequate size Pipes of smaller size than the heater inlet gas connection should not be used Figure 9 Gas Connection with Stainless Steel Flex Connector e Hold gas nipple securely with pipe wrench when attaching the flex gas connector F Option A e Do not twist flexible vrd lt Stainless Steel gas connector Flex Gas Connector e Ensure all joints a
34. een formed check condition of ceramic insulators Replace as necessary 30 13 3 Fan Motor Assembly Maintenance The main fan bearings are permanently sealed and do not need lubrication Before cleaning turn off gas and electrical supply Remove the fan s and use a small brush or duster to clean the fan blades from each side Replace fan s when done 13 3 1 For CTUB 8 CTUC Centrifugal Fan Models CTUB and CTUC models are fitted with thermally protected three speed fans The number of fans can be found on Page 41 Section 16 9 and the standard air flow for each model can be found on Page 7 Section 4 3 For CTUC models the fans may be accessed via the removable panels in the top bottom and sides of the inlet spigot compartment as required Do not operate at higher speeds than the original setting on the heater without prior consultation with Roberts Gordon The HIGH speed option is available to give the normal required air flow against higher static pressures and is not intended to be operated free blowing or against low resistance Use of the fans under these conditions may cause the fan thermal overload to operate and the fan thermostat to cycle All fans on a heater must be set to operate at the same speed For Models 50 115 they will be switched using a fan relay built into the heater See Page 40 Section 16 8 2 13 4 Heat Exchanger Maintenance The heat exchanger will remain clean unless a problem has developed wi
35. er is as shown in the front view of the burner compartment Description Part Number Spark Electrode 90427411 Automatic Ignition Flame Probe 90439300 Burners all models except CTU 40 92000000 Burners CTU 40 92000001 37 COMBAT CTU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL 16 4 Flue Fan Remove screws securing outlet Rear Panel flange to the flue adapter Flue Adapter to Flue Fan screws Vent Box tt Vent B San y Outlet Adapter Gasket Flue Fan Disconnect electrical connections at plug in tabs Remove screws securing flue l fan mounting plate to vent box Mounting Remove screws securing mounting plate to fan he Mounting Plate Refit in reverse to Vent Box Use new gaskets Screws Ensure sealed joints Gasket Ensure mounting plate orifice is Mounting Plate 3 Area clear and not obstructed to Flue Fan Screws CTU 22 CTU 30 CTU 35 CTU 40 CTU 50 CTU 60 CTU 75 CTU 90 CTU 100 CTU 115 Flue Fan Torin DSA Torin DSA Torin DSA Torin DSA Torin DSA Torin DSA AO Smith AO Smith AO Smith Torin DSF 508 128 508 128 508 128 508 128 524 202 524 202 JFIGO9BNS JFIGO98NS JFIGO98NS 146 052 077272 077272 077272 077272 077273 077273 077274 RG P N 90710430 90710430 90710430 90710430 90710440 90710440 90710001 90710001 90710001 90710450 Air mm Y 476 53 1 60 7 69 1 60 7 69 9 97 0 103 6
36. he main terminals A switch or control wired between terminals L amp 1 in the terminal block will allow external control of the fan s The fan may be controlled to operate continuously from an external control with the burner cycling on and off providing that the fan run on at close down is not impaired 15 COMBAT CTU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL 10 3 CTUA Wiring Diagram Models 22 60 IGNITION MODULE Time Delay Relay BLUE BROWN YELLOW BROWN WHITE PURPLE GREY Thermostat Limit Thermodisc N C GAS VALVE BROWN I gt LOCKOUT RESET AXIAL FAN GREEN YELLOW BLUE PRESSURE SWITCH Pressure Switch Detail GREEN YELLOW COMBUSTION BLUE a 2 BROWN R9 MAINS FILTER LOCKOUT SITE WIRING So 3 JO I So 3 So 3 No 3 So 3 IGNITION MODULE Plug in Connection to Gas Valve Honeywell S4565C 1017 Control Le__e REMOTE FAN ON 0__0 THERMOSTAT n REMOTE LOCKOUT INDICATION rs REMOTE LOCKOUT RESET 222472227 UNE NOTE If any of the original wire supplied with the heater must be replaced it must be replaced with wiring material having a temperature rating of at least 105 C and 600 volts N jb GROUND oo Oo NEUTRAL 2 al TAZ SECTIO
37. in accordance with local and national codes Ensure that the air is fully purged from the heater inlet pipe up to the main gas valve inlet test nipple 11 3 Mechanical Checks 1 Check that the fan s are free to run and delivery louvres are turned to give required air deflection 2 Check that the flue and air intake for room sealed is installed in accordance with these instructions and local regulations 3 The thermostat limit thermodisc is preset and sealed at the factory and is not adjustable 11 4 Begin Commissioning 11 4 1 Before Operating the Heater To ensure that all the controls are in safe working order operate the heater for the first time with the isolating gas valve turned off 1 Turn off the gas isolating valve 2 Using the installed external control turn on the burner The automatic sequence will now begin as described on Page 25 Figure 10 There will be no ignition of the burner and lockout will occur which proves the controls are operating correctly SECTION 11 COMMISSIONING Figure 10 Automatic Burner Control Box Sequence Burner sequence for Honeywell S4563 or S4565C Supply 230V 0 MAA Flue Fan Cr gt eNO Pressure Syne P Pam MIM CS C NC 30 Sec Purge k ts Ignition Spark QX Start Gas Valve Y EE AMOO NON Ts Flame Signal et Required Incoming Signals Signals Output By Control lt A Purge time begins at pressure switch change over ts Safety time S4563
38. ing W 1400 1400 1400 1400 1400 1700 1700 1700 1700 41 SECTION 16 REMOVAL AND REPLACEMENT PARTS Attach this information to the wall near the ROBERTS GORDON heater ROBERTS GORDON Read the Installation Commissioning Operation and Service Manual thoroughly before installation operation or service OPERATING INSTRUCTIONS 1 STOP Read all safety instructions on this information sheet 2 Open the manual gas valve in the heater supply line 3 Turn on electric power to the heater 4 Set the thermostat to desired setting above ambient temperature The automatic starting sequence begins NOTE Following long shutdown periods the burner control may go to to LOCKOUT during the start sequence Push the reset button to recommence firing Contact service department if LOCKOUT continues see manual for details TO TURN OFF THE HEATER 1 Turn the thermostat time switch to OFF The burner will turn OFF immediately but fans will continue to cool heat exchanger until the fan thermostat switches off IF THE HEATER WILL NOT OPERATE TO ENSURE YOUR SAFETY FOLLOW THESE INSTRUCTIONS TO SHUT DOWN YOUR HEATER 1 Set the thermostat to off or the lowest setting 2 Turn off electric power to the heater 3 Turn off the manual gas valve in the heater supply line 4 Call your registered installer contractor qualified in the installation Fire Hazard Some objects can catch fire or explod
39. is manual carefully before installation commissioning operation or service of this equipment All components are accessed via the hinged door secured by a turn latch Opening the door exposes live electrical connections and hot components A WARNING Electrical Shock Hazard Use extreme caution while commissioning Failure to follow these instructions can result in death or electrical shock 11 1 Pre Commission Checks All pre commission checks must be carried out before lighting the heater Ensure that the heater and all controls are suitable for the gas pressure and electrical supply to which they are to be connected 11 1 1 Louvres Where fitted the air delivery louvres need to be set during commissioning to give the required air distribution A WARNING Cut Hazard Turn off gas and electrical supply before maintenance Fan can start automatically at any time Failure to follow these instructions can result in severe injury or product damage 24 11 1 2 Electrical Checks All pre commission checks must be carried out before commissioning the heater 1 Check that all site wiring is connected in accordance with the appropriate wiring dia grams on Page 16 Section 10 3 through Page 23 Section 10 10 2 Check the correct fuse size is fitted See Page 15 Section 10 1 11 2 Gas Supply All aspects of the gas installation including the gas meter must be inspected tested for soundness and purged
40. isc operated or light faulty Reset or replace as necessary Are external controls on Is the green light on Yes Press in lockout reset button on rear of heater or remote reset button if fitted Is red lockout light on Is 230 V supply at fan connections Does flue fan run Flue fan faulty replace Burner control faulty or plug in connections faulty Repair or replace as necessary Check for too much flue air inlet duct Check for blockage in combustion air circuit Check for faulty air pressure switch See section 16 5 Does air pressure switch change over Is HT lead okay and connected Is spark electrode okay Ignition control faulty replace See Section 15 6 Wait 30 40 seconds Is ignition spark operating Yes Is the gas valve operating To test valve see Section 15 4 Does the flame light Replace valve Is the flame current at least 1 uAmp DC when No the flame lights Trace fault in supervision Is red lockout light on system See Section 16 3 If problems persist contact ROBERTS GORDON at Tel 44 0 121 506 7709 www rg inc com Heater Operating TROUBLESHOOT ENDS Do not touch ignition components Voltage from ignition components is high Failure to follow these instructions can result in death or electrical shock For your safety and optimum heater perform
41. levation above sea level Fax 44 0 121 506 7701 Service Telephone 44 0 121 506 7709 Service Fax 44 0 121 506 7702 E mail uksales rg inc com E mail export rg inc com Roberts Gordon LLC 1250 William Street P O Box 44 Buffalo NY 14240 0044 USA Telephone 716 852 4400 Fax 716 852 0854 Toll Free 800 828 7450 Further Information Applications engineering and detailed guidance on systems design installation and equipment performance is available through ROBERTS GORDON representatives Please contact us for any further information you may require including the Installation Commissioning Operation and Service Manual These products are not for residential use O 2007 Roberts Gordon LLC www rg inc com Printed in U S A P N 91040028 Rev B 45
42. ls not furnished as standard equipment To plan 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 heater To ensure that there is sufficient ventilation in the area to comply with the requirements of all relevant local and national codes 2 1 Clearances to Combustibles In all situations clearances to combustibles must be maintained Caution must be used when running the heater near combustible materials such as wood paper rubber etc A wall tag P N 91040028 is on the back cover of this manual as a permanent reminder of the safety instructions and the importance of the required clearances to combustibles Affix the tag on a wall near the heater 2 2 2 Corrosive Chemicals A CAUTION Do not use heater in an area containing corrosive chemicals Corrosive chemicals will damage the burner and heat exchanger parts Failure to follow these instructions can result in property damage Roberts Gordon 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 co
43. ng Burner Faults If the burner fails to ignite for any reason it will go to lockout This will be indicated by the red light on the heater or at the remote indicator if fitted 1 Press in and release the lockout reset button If a remote reset is not fitted a reset button is on the rear panel of the heater See Page 5 Section 4 1 Lockout should not occur during normal operation of the heater and indicates there is a fault condition which must be corrected SECTION 12 USER INSTRUCTIONS FOR YOUR SAFETY If you smell gas Open windows DO NOT try to light any appliance DO NOT use electrical switches DO NOT use any telephone in your building Leave the building 6 Immediately call your local gas supplier after leaving the building Follow the gas supplier s instructions If you cannot reach your gas supplier call the Fire Department A WARNING Fire Hazard Do not store or use petrol or other flammable vapours and liquids in the vicinity of this or any other appliance 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 29 COMBAT CTU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL SECTION 13 SERVICING 13 1 Servicing Instructions After commissioning the heater will require maintenance to be carried out annually If the heater is used in a dirty or dusty area more frequen
44. njectors for the new gas ensuring a gas tight seal 6 Refit all components in reverse order 14 3 Gas Valves All gas valves used on the CTU have pressure regulators that may be set to operate on natural gas or LPG Conversion is carried out by re setting the burner pressure to the value in the data table during commissioning See Page 8 Section 4 4 Ensure that the gas inlet pressure to the heater is correct for the new gas and that the gas supply has been purged of the old gas SECTION 14 CONVERSION BETWEEN GASES 31 COMBAT CTU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL SECTION 15 TROUBLESHOOTING 15 1 General A WARNING Explosion Hazard Installation must be done by a registered installer contractor qualified in the installation and service of gas fired heating equipment or your gas supplier Failure to follow these instructions can result in death injury or property damage Start Are gas amp electrical supplies on Turn on supplies Is Red lockout warning light on Use 15 2 to test burner Check limt thermostat s Reset With external controls on does the burner continue to fire No Check time delat relay Is there 230 V accross brown No and blue wires Is distribution air fan operating Change time delay relay If problems persist contact ROBERTS GORDON at Tel 44 0 121 506 7709 www rg inc com Heater
45. of 27 Nm 20 ft lbs Cone Point Set Pin Support Points COMBAT CTU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL SECTION 6 FLUE INSTALLATION 6 1 Flue Installation A WARNING Fire Hazard Some objects will catch fire or explode when placed close to heater Keep all flammable objects liquids and vapours the required distance away from the heater Failure to follow these instructions can result in death injury or property damage 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 10 Figure 3 through Page 11 Figure 6 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 25 mm 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 10 Figure 3 through Page 11 Figure 6 6 2 Type C12 C32 amp Ces 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 11 Figure 6 6 3 Type Bz A
46. onnect electrical power before servicing Failure to follow these instructions can result in death or electrical shock 12 2 Heater Operation When the heater has been switched on by the remote controls installed on site the main burner will automatically turn on The burner control box will control the safe ignition of the flame All heaters require a constant gas and electricity supply which must not be interrupted during the normal operation of this heater Figure 13 Heater Operating Sequence ON CLOSE THERMOSTAT DOWN es CALL FOR u A BURNER 7 RUN ON gt 2 3 MINUTES gl C 28 12 3 Common User Controls 12 3 1 Thermostat Limit Thermodisc Press to reset These are hand reset devices to give further protection against fan failure NOTE To reset the heat exchanger must be cool Description All Models Part Number 90412100 A WARNING Explosion Hazard If control locks out do not make more than 3 attempts to restart the heater Dangerous gas mixtures can build up The fault must be traced and repaired by a registered installer or service engineer Failure to follow these instructions can result in death injury or property damage 12 3 2 Burner Lockout Reset Button The red warning light at the front of the heater will illuminate when the control has gone to lockout This may be caused by flame failure Press the reset button on the back of the
47. or below E 54 x M10 Captive Nuts Provided Support Centers 492 zs End View ITT CT Rear View Air Intake wi N Y CE TE S Wes SZ Q Uf AN WN DA YY Z gt EZ SN N Lockout Reset Electrical A Cable Entry Dimension Data CTUA All Models Model 22 30 35 40 50 60 75 90 100 115 A an mm 1075 1075 1075 1075 1075 1075 1327 1327 1327 1327 nt 42 3 42 3 42 3 42 3 42 3 423 623 6623 523 523 R didia mm 610 610 610 610 895 895 1100 1100 1345 1345 9 in 24 24 24 24 35 2 35 2 43 3 43 3 53 53 T S mm 450 450 450 450 450 450 627 627 627 627 Support Spacing w an E azm ama lama I Oa Cele 47 ern E D mm 312 312 312 312 312 312 312 312 312 312 Support Spacing in 12 3 123 123 123 123 12 3 123 123 123 123 E mm 315 315 315 315 315 315 388 388 388 388 Support Spacing in 12 4 124 124 124 124 124 153 153 153 153 per mm 240 240 240 240 430 430 346 346 537 537 in 9 5 9 5 9 5 95 16 9 16 9 13 6 13 6 211 21 1 6 mm 140 140 140 140 140 140 225 225 225
48. otate before turning on the power to the fan e Strictly comply with the colour code of the fan wires to ensure correct operation See Page 16 Section 10 3 through Page 17 Section 10 4 wir ing diagrams e Use only genuine ROBERTS GORDON replacement parts 16 8 CTUB amp CTUC Centrifugal Fan Guard Motor Assembly The direct drive fan s for the CTUB amp CTUC range is supplied as a complete assembly Take careful note of the electrical connections of the fan before disconnecting from the terminals For the CTUC versions fitted with an inlet spigot assembly the fans may be accessed through the removable covers on the sides top and bottom of the spigot as required 16 8 1 Fan Removal and Replacement 20 mm x 5 mm Adhesive Seal is applied to the flange Part Number A047 A049 Description Torin Fan DDC 270 270 Torin Fan DDC 241 241 Remove the fan by removing the fixing screws while supporting the weight of the fan approx 19 kg 16 8 2 To Replace the Fan s To reassemble reverse the procedure shown above s Fit new rubber seal between the fan flange and the heater rear panel s Fit to the rear panel in the correct orientation as shown on Page 41 Figure 14 e Strictly comply with the colour code of the fan wires to ensure correct operation See Page 18 Section 10 5 through Page 20 Section 10 7 wiring diagrams SECTION 16 REMOVAL AND REPLACEMENT PARTS e Use only genuine ROBE
49. our suspension points M10 nuts are located on top of the heater s Must be installed in a manner which allows the hinged door to be fully opened to provide access to all serviceable components 3 3 Minimum Required Installation Clearances Clearances around the heater and flue must be as indicated on Page 4 Figure 1 Page 10 Figure 3 through Page 11 Figure 6 to ensure access for servicing and correct operation 3 4 Clearances to Combustibles Clearances must be as indicated on Page 4 Figure 1 If clearances to combustibles are not indicated then installation clearances apply 3 5 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 3 6 Gas Supply 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 3 7 Electrical Supply 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 10 SECTION 3 CRITICAL CONSIDERATIONS 3 8 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 Page 10 Section 6 No o
50. ppliance The flue must terminate outside the building and be fitted with a low resistance terminal See Page 10 Figure 3 through Page 11 Figure 5 6 3 1 Air Intake Terminal Cover For Type Bo appliance installations an air intake terminal cover is an available option The cover is scored flat sheet metal that must be bent into shape See Page 10 Figure 4 Remove and retain the screws for the air inlet spigot Use these screws to attach the cover in position over the spigot 10 Figure 3 Flue and Roof Detail Flue Terminal 25 mm Air Gap to Combustible Material D A Fold Fott Out Out Masterflash Soaker Flashing or Rain Collar Description Part Number Air Intake Terminal Cover 100mm F078A Air Intake Terminal Cover 130mm FO77A SECTION 6 FLUE INSTALLATION Figure 5 Vertical and Horizontal Flue Termination Type B Appliance lt Roof Terminal Masterflash Metal Sleeve 25 mm air gap to Combustible Material Flue Air Intake Terminal Cover Vertical Option 90 Bend Masterflash Horizontal 7 Option Wall Terminal Figure 6 Vertical and Horizontal Flue Termination Type C12 C32 Co Appliances Model Concentric Flue Diameter 22 60 Cover 100mm 150mm 75 115 Cover 130mm 200mm Air Intake Vertical 7
51. re gas tight Do not bend flexible gas connector sharply Option B Medium or Heavy Gas Isolating Valve Gauge Tubing ss Gas Connector Drip Leg i a Union Cap Connection SECTION 10 WIRING AND ELECTRICAL INFORMATION SECTION 10 WIRING AND ELECTRICAL INFORMATION 10 1 Electrical Supply All heaters need a constant 230 V 50 Hz single phase supply connected to terminals L N amp Earth Polarity L amp N must be correct The voltage between neutral and earth should be O and never exceed 15 volts All heaters and controls must be correctly earthed All external wiring must comply with the relevant local codes Wire specification HO5VV F External controls must have the same constant 230 V 50 Hz supply An isolator with a contact separation of at least 3 mm on all poles must be installed adjacent to but not attached to the heater to disconnect all supplies to the heater and any remote control The final connection to the heater should be made by flexible cable or conduit to the main terminal block on the inside of the heater using 1 mm cable on all models Models sided Fuse Size CTUA All Models sss sese
52. rrosive chemicals or halogenated hydrocarbons anywhere in the premises Halogenated Hydrocarbons are a family of chemical compounds characterized by the presence of halogen elements fluorine chlorine bromine etc These com pounds are frequently used in refrigerants cleaning agents solvents etc If these compounds enter the air supply of the burner the lifespan of the heater compo nents will be greatly reduced Warranty will be invalid if the heater is exposed to halogenated hydrocarbons 2 3 National Standards and Applicable Codes All appliances must be installed in accordance with the latest revision of applicable standards and local and national codes This refers also to the electric gas and venting installation Note Additional standards for installations in public garages aircraft hangars etc may be applicable SECTION 3 CRITICAL CONSIDERATIONS 3 1 Basic Information CTU heaters have automatic ignition burners for ON OFF operation only 3 2 Location and Suspension All models e Must be installed indoors s Must be installed in a level position May be mounted on a shelf of non combustible material See Page 5 Section 4 and Page 9 Figure 2 for support points e May be suspended from above See Page 9 Figure 2 or from wall brackets of sufficient strength to support the heater as listed in the Dimension Data Table on Page 5 Section 4 1 Drop rods must be a minimum of 10 mm diame ter mild steel F
53. s too low to allow correct burner pressure setting then the gas inlet pressure must be corrected before completing the commission Check Gas Rate 1 After burner pressure adjustment allow the heater to operate for at least 15 minutes and then re check settings 2 Remove the manometer and refit all covers to the valve and tighten the screw of the outlet pressure tap 3 Check gas flow rate at gas meter 26 Regulator Under Cover Plug for Main Safety Gas Valve 11 5 Combustion Testing The only adjustment to alter combustion performance is burner pressure Combustion quality must be tested to prove correct heater operation Incorrect results will indicate faults with the installation or appliance Combustion testing must be carried out with all covers in place The flue gas is sampled in the flue within 1 meter of the heater The values of CO should be between 6 5 to 8 0 for natural gas and 7 0 to 9 1 for LPG dependant upon model The CO will be up to 80 ppm 0 008 dry air free dependant upon model Temperature rise of the flue gases above ambient should be approximately 160 C to 180 C Seal test hole in flue after testing Pressure Switch The pressure switch is factory pre set for each model and is not adjustable 11 6 Turning Off the Heater Set the external controls to the off position and the main burner will stop The fans will run until they are stopped automatically by the fan thermosta
54. sure mbar 26 6 24 9 25 4 25 9 25 6 26 8 25 6 273 25 3 25 9 m h 1 01 1 23 1 48 1 77 2 27 2 58 3 51 4 09 4 39 4 97 kg h 1 87 2 28 2 75 3 27 4 21 4 79 6 50 7 58 8 13 9 21 Gas Rate liquid h 3 7 4 5 5 4 6 4 8 3 9 4 12 8 14 9 16 0 18 1 LPG Gas Butane G30 Data Inlet Pressure 29 mbar 11 4 in WG Min 20 mbar 7 8 in WG Max 35 mbar 13 8 WG Burner Pressure mbar 18 9 17 4 17 8 19 5 18 4 19 0 18 3 19 4 18 3 18 7 m3 h 0 76 0 93 1 06 1 34 1 72 1 95 2 65 3 09 3 32 3 75 kg h 1 86 2 27 2 59 3 26 4 19 4 77 6 47 7 55 8 09 9 17 Gas Rate liquid h 3 2 4 0 4 5 5 7 73 8 3 11 3 13 2 14 1 16 0 Gas rates corrected to standard conditions 1013 25 mbar 15 C SECTION 5 HEATER INSTALLATION SECTION 5 HEATER INSTALLATION 5 1 General 5 3 Shelf Mounting and Suspension Heaters are designed for installation above 2 5 m These heaters must be installed within the heated A WARNING space Duct delivery systems are not permitted with Crush Hazard axial fans Use 10 mm steel drop rod minimum 5 2 Handling All CTU heaters are supplied secured to a wooden alc Raa ee can pallet and shrink wrapped Use the pallet to support or property damage the heater during handling and installation When handling or supporting the heater from below For typical suspension See Page 9 Figure 2 ensure that the weight is taken atthe support points Figure 2 Suspension Methods Insure all suspension hardware is torqued to a minimum
55. t Do not use electrical isolator for control of heater Electrical isolator will switch off the fan Heat exchanger could be damaged Warranty will not cover damage to the heat exchanger if operated improperly 11 7 External Controls External controls may include time switch room thermostat and frost thermostat Operate each control to ensure that they function correctly Set the time switch if fitted and room thermostat to the users requirements 11 8 Complete the Commissioning Ensure that all covers are fitted correctly and all test points are properly sealed 11 9 Instruction to the User Explain the controls of the heater to the user including how to turn it on and off using the controls fitted on site Give this manual to the user Ensure that the user is shown and understands the importance of maintaining clearances to combustibles and the user instructions on Page 28 Section 12 through Page 29 Section 12 5 and all warnings defined in this manual SECTION 11 COMMISSIONING 27 COMBAT CTU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL SECTION 12 USER INSTRUCTIONS 12 1 User Instructions The CTU heaters are fully automatic and operate from the external controls fitted on site The only user controls at the heater are the Burner Lockout Reset Button See Page 28 Section 12 3 2 Thermostat Limit Thermodisc Reset Button See Page 28 Section 12 3 1 A WARNING Electrical Shock Hazard Disc
56. t maintenance may be necessary Installation service and annual inspection of heater must be done by a contractor qualified in the installation and service of gas fired heating equipment A WARNING Cut Hazard Turn off gas and electrical supply before maintenance Fan can start automatically at any time Failure to follow these instructions can result in severe injury or product damage NOTE 1 After any maintenance or repair work always test fire the heater in accordance with the commissioning instructions on Page 24 Section 11 through Page 27 Section 11 9 to ensure all safety systems are in working order before leaving the heater to operate Minor faults may be traced by using the troubleshooting charts on Page 32 Section 15 through Page 34 Section 15 4 NOTE 2 Check all gas pipes and pipe joints to ensure there are no cracks or gas leaks Any cracks in the pipes or pipe joints must be repaired NOTE 3 Inspect all suspended components and hardware Insure that they are in good condition properly tightened and corrosion free 13 2 Burner Maintenance 1 Open the hinged door and remove the burner compartment cover See Page 36 Section 16 2 2 Clean any deposits from the main burner which may have formed in the injectors or venturi of the burner See Page 36 Section 16 2 3 Remove the ignition electrode and flame probe Check condition of ignition electrode and flame probe Clean off any deposits which may have b
57. t the gas flow Page 26 Section 11 4 2 direction of the valve is correct Use a minimum IT IS IMPORTANT THAT ONLY THE CORRECT amount of gas seal on the thread joint Re use the GAS VALVES SPECIFIED FOR EACH MODEL O ring seal in the outlet flange where fitted Check TYPE ARE USED WHEN REPLACING THESE that all the joints are leak free Reset gas valve See CONTROLS 35 COMBAT CTU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL 16 2 Burner Compartment The burner compartment is a sealed Burner compartment Following any work compartment re seal the compartment with the gas cover pipe rubber seal fully in place and all Flame probe screws fitted and tight Viewing port for flame probe Remove flexible air duct from spigot Ignition electrode Viewing port for ignition electrode TE Remove access plate Rubber Seal Remove screws and pull off burner cover 16 2 1 Burner Injectors Ensure gas tight fitting of injectors Ensure correct alignment with burners Ensure all pipe joints are gas tight Manifold JE m 1 Burners Remove manifold screws and pull Injectors out manifold ISIS El 1 Unscrew Injectors L L ES pe Ca Marking CTU 22 CTU 30 CTU 35 CTU 40 CTU 50 CTU 60 CTU 75 CTU 90 CTU 100 CTU 115 Injector Quantity 5 5 6 7 9 11 12 14 15
58. th combustion Inspectthe heat exchanger Look for signs of overheating at the front tubes which may indicate burner over firing or persistently low air flows 13 5 Gas Control Valve Maintenance No regular maintenance is required on these devices To change gas control valves See Page 35 Step 16 1 and Page 39 Section 16 5 Do not repair or disassemble on site Replace faulty gas valves with genuine ROBERTS GORDON replacement parts 13 6 Flue Fan The flue fan should not require maintenance However if the air pressure switch is causing burner lockout then remove the flue fan from the vent box by unscrewing the screw at the outlet flange and the flue fan mounting plate See Page 38 Section 16 4 Ensure that the fan is free to run and that the fan wheel is clean SECTION 14 CONVERSION BETWEEN GASES 14 1 General Conversion between gasses will require a change of burner injectors and the gas valve re commissioning to the new conditions 14 2 Burner Conversion Conversion of the burner assembly from one gas to the other is the same for all types of heaters 1 Remove the burner compartment cover as shown on Page 36 Section 16 2 2 Remove the connection between the gas valve outlet and the manifold See Page 35 Section 16 1 for gas valve removal 3 Remove the manifold from the burner assembly by removing the screws at the top and bottom See Page 36 Section 16 2 1 4 Remove the main burner injectors 5 Replace with the i
59. ther 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 COMBAT CTU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL A WARNING Fire Hazard Some objects will catch fire or explode when placed close to heater Keep all flammable objects liquids and vapours the required distance away from the heater Failure to follow these instructions can result in death injury or property damage Figure 1 Installation Clearances and Clearances to Combustibles Installation Clearances y Clearances to Combustibles Roof Terminal Wall Terminal Heaters may be mounted at a higher level if destratification fans and or turn down nozzles are installed 80 cm is necessary to service heater The heater must always be installed at least 2 5 m above the floor The flue pipe must have clearance from combustibles by 5 cm If installed at low levels where individuals can come in contact with hot heat exchanger components adequate guarding must be provided All distances are minimum clearance requirements for service access air flow and safety SECTION 4 SPECIFICATIONS SECTION 4 SPECIFICATIONS 4 1 CTUA Top View Heater must be supported at these points from above

Roberts Gorden COMBAT CTU 22 TO 115 User's Manual

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