Roberts Gorden COMPLETE HED Series Installation, Operation & Service Manual Download Page 47

Page: 47 / 72

SECTION

: V

ENTING

Vertical Ventilation 4" (10 cm) Pipe

Step

.9 Common Sidewall Ventin

Req

irements:

• Maxim

m of t

o heaters can be commonly

ented thro

gh a side

all.

• Heaters m

st be of the same BTU o

• Heaters m

st be controlled by a common

thermostat.

Description

Part Number

Vent Cap 4" (10 cm)

90502300

Description

Part Number

Vent Terminal 6" (15 cm)

90502101

Summary of Contents for COMPLETE HED Series

Page 1: ...1 716 852 0854 Toll Free 800 828 7450 www robertsgordon com 2018 Roberts Gordon LLC 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 gas supplier after leaving the building Follow the gas supplier s in...

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Page 3: ...tallation 36 SECTION 8 Venting 37 8 1 General Venting Requirements 37 8 2 Unvented Operation 37 8 3 Horizontal Venting 38 8 4 Vertical Venting 38 8 5 Unvented Operation Tube Termination 38 8 6 Length Requirements 38 8 7 Horizontal Ventilation 4 10 cm Pipe 40 8 8 Vertical Ventilation 4 10 cm Pipe 41 8 10 Common Vertical Venting 42 8 11 Outside Combustion Air Supply 43 SECTION 9 Gas Piping 45 SECTIO...

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Page 5: ...tallation 17 Figure 17 Linear Heater Assembly Overview 18 Figure 18 Linear Heater Layout Overview 19 Figure 19 Linear Heater Layout Overview Continued 20 Figure 20 U Tube Heater Assembly Overview 28 Figure 21 U Tube Heater Layout Overview 29 Figure 22 U Tube Heater Layout Overview Continued 30 Figure 23 Reflector Joint Detail 32 Figure 24 Tube Termination 38 Figure 25 Combustion Air Weather Vent P...

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Page 7: ...s to the surface of the reflector Before installation check that the local distribution conditions nature of gas and pressure and adjust ment of the appliance are compatible This heater must be applied 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 senso...

Page 8: ...TALLATION OPERATION AND SERVICE MANUAL 2 FIGURE 1 Top and Bottom Panel Label Placement Description Part Number Logo Label 91013200 Rating Plate Label 91013220 Gas Connection Label 91018122 Vent Length Label 91039500 ...

Page 9: ...GURE 2 Side and Back Panel Label Placement Description Part Number Rating Plate Label 91010401 Lighting Instruction Plate Label 91029602 Wiring Label 91030308 Clearances to Combustibles Label 91013432 Proposition 65 Label 91070016 ...

Page 10: ...wall tag P N 91037912 is illustrated on the back cover For an immediate solution you may affix this copy on the wall near the heater Know your model number and installed configuration Model number and installed configuration are found on the burner and in the Installation Operation and Service Manual See Page 5 Figure 3 through Page 8 Figure 12 Write the proper clearance dimensions in permanent in...

Page 11: ...erhead 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 com bustibles Signs must be posted adjacent to the heater thermostat In the absence of a thermostat signs must be posted in a co...

Page 12: ...83 65 16 23 211 166 HED 150 6 9 86 69 16 23 219 176 HED 175 8 9 88 73 21 23 224 186 FIGURE 5 TWO SIDE REFLECTORS inches centimeters Model A B C D A B C D HED 40 6 15 53 15 16 39 135 39 HED 60 6 23 66 23 16 59 168 59 HED 80 6 25 72 25 16 64 183 64 HED 100 6 27 78 27 16 69 199 69 HED 125 6 32 84 32 16 82 214 82 HED 150 6 35 88 35 16 89 224 89 HED 175 8 40 91 40 21 102 232 102 FIGURE 6 45 TILT REFLEC...

Page 13: ...01 110 HED 150 6 50 84 47 16 127 214 120 HED 175 8 54 87 51 21 138 221 130 FIGURE 8 U TUBE 45 inches centimeters Model A B C D A B C D HED 40 UNAPPROVED UNAPPROVED HED 60 8 8 60 42 21 21 153 107 HED 80 8 8 66 46 21 21 168 117 HED 100 8 8 74 52 21 21 188 133 HED 125 8 8 78 61 21 21 199 155 HED 150 8 8 84 66 21 21 214 168 HED 175 8 8 85 70 21 21 216 178 D B A C FIGURE 9 U TUBE OPPOSITE 45 REFLECTOR ...

Page 14: ... 16 102 181 102 HED 125 6 46 77 46 16 117 196 117 HED 150 6 50 80 50 16 127 204 127 HED 175 8 52 82 52 21 133 209 133 FIGURE 11 LOWER CLEARANCE SHIELD inches centimeters Model A B C D A B C D HED 40 6 34 27 34 16 87 69 87 HED 60 6 39 33 39 16 100 84 100 HED 80 6 40 38 40 16 102 97 102 HED 100 6 50 44 50 16 127 112 127 HED 125 6 54 48 54 16 138 122 138 HED 150 6 55 50 55 16 140 127 140 HED 175 UNAP...

Page 15: ...sions shall be made to assure accessibility to suspended heaters for recurrent maintenance purposes 4 3 Public Garages Installation in garages must be in accordance with the following codes United States Refer to Standard for Parking Structures NFPA 88A latest revision or the Code for Motor Fuel Dispensing Facilities and Repair Garages NFPA 30A latest revision Canada Refer to Natural Gas and Propa...

Page 16: ... 4 10 cm away from the burner Coupling Assembly with Lock Reflector End Cap Punch out center section to accommodate tube Tube and Reflector Hanger Suspend system from these hangers Flex Gas Line with Shut Off Cock Tube Hot rolled or heat treated aluminized tube supplied in 10 3 m lengths Reflector Support Strap Wire Form Turbulator Install turbulator as specified in the Turbulator Installation cha...

Page 17: ...oupling Assembly with Lock Reflector End Cap EF Punch out center section to accommodate tube Tube and Reflector Hanger EF Suspend system from these hangers Flex Gas Line with Shut Off Cock Tube Hot rolled or heat treated aluminized tube supplied in 10 3 m lengths Reflector Support Strap Wire Form Turbulator Install turbulator as specified in the Turbulator Installation chart See Page 23 Step 6 5 T...

Page 18: ...zed with Aluminum Reflector Aluminized with Stainless Steel Reflector Part No Description 10 3 m 20 6 m 30 9 m 40 12 m 10 3 m 20 6 m 30 9 m 40 12 m 10 3 m 20 6 m 30 9 m 40 1 2m 10 3 m 20 6 m 30 9 m 40 12 m 91409408 Tube HT Aluminized 10 3 m 1 2 3 1 2 3 1 2 3 4 1 2 3 4 03051105 Burner Tube ALUMI THERM Steel 10 3 m ST 1 1 03051106 Burner Tube ALUMI THERM Steel 10 3 m HED 1 1 03051605 Burner Tube HT ...

Page 19: ...1 1 03051605 Burner Tube HT ALUMI THERM Steel 10 3 m ST 1 1 01312700 Coupling Assembly 1 2 3 1 2 3 4 02750313 Standard Reflector 8 3 5 m EF 2 3 4 6 2 3 4 6 02750802 End Cap EF 2 2 2 2 03090102 Tube and Reflector Hanger EF 2 3 4 5 1 2 3 4 91907302 S Hook 2 3 4 5 1 2 3 4 03050012 Reflector Support Package Strap Wire Form Screws EF 1 2 3 5 2 3 4 6 91107720 U Clip Package 1 1 1 1 1 1 1 1 90502701 Vent...

Page 20: ...Hot Rolled Steel Aluminized HED 40 10 3m CPST10ALUM CPST10ALUMSS HED 60 20 6m CPST20ALUM CPST20ALUMSS HED 80 20 6m CPST20ALUM CPST20ALUMSS HED 100 30 9m CPST30ALUM CPST30ALUMSS HED 125 40 12m CPST40ALUM CPST40ALUMSS HED 150 50 15m CPST30ALUM EXP20ALUM CPST30ALUMSS EXP20ALUMSS HED 175 60 18m CPST30ALUM EXP30ALUM CPST30ALUMSS EXP30ALUMSS Model Tubing Length Core and Extension Packages SS Stainless S...

Page 21: ...ndicated on the rating plate and in this instruction manual The minimum and maximum gas inlet pressures must be maintained as indicated on the rating plate Typical installation configurations are shown in Figure 15 Expansion and contraction of the tube dictates that the minimum suspension lengths in the table on Page 16 Figure 15 be maintained WARNING Severe Injury Hazard Secure burner to burner t...

Page 22: ... 16 FIGURE 15 Critical Hanger Placement Description Part Number S Hook 91907302 Tube Reflector Hanger 030901XX Run Length Typical Expansion Minimum X Length 10 3 m 50 15 m 1 3 cm 12 305 mm 51 15 m 60 18 m 2 5 cm 18 457 mm 61 18 m 70 24 m 3 8 cm 24 609 mm ...

Page 23: ...re a vehicle with a painted or non metallic upper surface may be parked within the clearances to combustibles See Page 17 Figure 16 The bottom of the combustion air inlet shall not be less than 12 30 cm above a surface which could support snow ice or debris FIGURE 16 Critical Hanger Placement Outdoor Installation Angle Iron or Metal Channel wall Typical Outdoor Suspension Details Unistrut Beam Cla...

Page 24: ...HED SERIES INSTALLATION OPERATION AND SERVICE MANUAL 18 FIGURE 17 Linear Heater Assembly Overview ...

Page 25: ...SECTION 6 HEATER INSTALLATION 19 FIGURE 18 Linear Heater Layout Overview ...

Page 26: ...ERATION AND SERVICE MANUAL 20 FIGURE 19 Linear Heater Layout Overview Continued g c b d e e e e f 50 Tube Length g c b d e e e e e f 60 Tube Length b f g c d e e e e e e 70 Tube Length b b f g c d e e e e e e 80 Tube Length b e ...

Page 27: ...TION 21 Step 6 2 Burner Tube Installation Step 6 3 Tube Clamp Package Installation Description Part Number Burner Tube 03051XXX S Hook 91907302 Tube Reflector Hanger 030901XX Description Part Number Tube Clamp Package 013189XX ...

Page 28: ... guide rail on opposite end of tabs Slide the slide bar coupling lock up the guide rail until snug approximately 3 8 cm to 4 10 cm C Insert tubes into coupling until end of each tube rests against internal pins D Strike slide bar coupling lock with mallet or hammer until tight Description Part Number Coupling 01329600 Slide Bar Coupling Lock 01329700 Tube 91409XXX Repeat Step 6 4 A D until all tub...

Page 29: ... m HED 150 50 15 m HED 175 60 18 m Description Part Number Turbulator Adapter 03051503 Turbulator Section 03051504 Turbulator Section stainless 03051505 Tube 91409XXX Turbulator Installation Model Tube Section HED 40 1st 10 Section HED 60 2nd 10 Section HED 80 2nd 10 Section HED 100 3rd 10 Section HED 125 4th 10 Section HED 150 5th 10 Section HED 175 N A Install turbulator as specified in the Turb...

Page 30: ...ith reflector hanger and support strap Reflector must not touch tube Failure to follow these instructions can result in death injury or property damage Description Part Number Tube Reflector Hanger 030901XX Burner Tube 03051XXX Reflector 96 244cm 027503XX NOTE All tube surfaces must be covered by a reflector except for a U Tube ...

Page 31: ...either pop rivets or sheet metal screws instead of u clips when installing end caps and joint pieces in areas where impact and high wind may be a factor The following rules must be observed 1 Slide first reflector after burner a minimum 2 4 cm through first hanger and ensure reflector end cap is securely fastened via U clips pop rivets or sheet metal screws Position reflector support with tight sc...

Page 32: ... OPERATION AND SERVICE MANUAL 26 Step 6 7 Burner Installation NOTE To ensure proper orientation attached burner tube with tube weld facing downward Description Part Number Burner 037XXXXX Lock Washer 96411600 Gasket 02568200 ...

Page 33: ... following additional rules must be adhered to A minimum of 10 3 m on HED 60 80 and a mini mum of 15 4 5 m on HED 100 125 150 175 is required between the burner and the U Tube The correct turbulator See Page 23 Figure 6 5 must be installed in the last standard section of tube The burner must never be operated in a tilted posi tion The heater must be properly supported at all loca tions See Page 29...

Page 34: ...view Description Part Number U Tube Package 03011XXX 180 U Tube 013359XX Tube and Reflector Hanger 030901XX Coupling 01312700 Reflector End Cap 027508XX U Tube Support Bracket 030205XX 4 10 cm U Bolts 91912500 Reflector Support Set 030500XX S Hook 91907302 Hex Nut 92113000 Lock Washer 96411500 ...

Page 35: ...SECTION 7 OPTIONAL HEATER ACCESSORIES 29 FIGURE 21 U Tube Heater Layout Overview ...

Page 36: ...NSTALLATION OPERATION AND SERVICE MANUAL 30 FIGURE 22 U Tube Heater Layout Overview Continued c b d e e f g h 70 Tube Length c b d e e g h 60 Tube Length c b d e f g h 50 Tube Length c b d e e g h 80 Tube Length e ...

Page 37: ...t Installation Description Part Number Elbow Package 027187XX 90 Elbow 01335801 Coupling 01312700 Reflector End Cap 0275080X Reflector Joint Piece 0275090X U Clip Package 91107720 Minimum Distance Required Between Burner and Elbow Model MinimumDistance HED 40 N A HED 60 10 3 m HED 80 10 3 m HED 100 15 4 5 m HED 125 15 4 5 m HED 150 15 4 5 m HED 175 15 4 5 m ...

Page 38: ...HED SERIES INSTALLATION OPERATION AND SERVICE MANUAL 32 Step 7 2 4 Reflector Joint Installation Step 7 2 5 Reflector Joint Detail FIGURE 23 Reflector Joint Detail ...

Page 39: ...ion Bracket 2 per Reflector Use additional supports in high air movement applications Tube and Reflector Hanger Reflector Tube Reflector Support Description Part Number Reflector Side Extension Package 0271270X Reflector Side Extension 96 244cm 0136800X Retainer Clips 02751200 Sheet Metal Screws 94118106 Order Separately Reflector Side Extension Bracket 01329910 ...

Page 40: ...p 7 5 1 Grille Installation 12 30 cm Reflector Lower Clearance Shield 17 43 cm Washers Screws Locknuts Align Pilot Holes Description Part Number Lower Clearance Shield Package 01397501 Shield Support Strap 01397500 Lower Clearance Shield 8 2447cm 02793000 Locknut 8 92311400 Flat Washer 8 95310800 Screw 8 x 3 8 93511406 Description Part Number Aluminum Grille 2 x 4 6m x 1 2 m 91407000 ...

Page 41: ...ion Installation for Decorative Grilles Description Part Number Deco Grille Shield 24 61cm 01365900 Distance A Extension Minimum Maximum Part No Width 2 4 cm 6 15 cm 013704XX 8 20 cm 6 15 cm 10 26 cm 013704XX 12 30 cm 10 26 cm 14 37 cm 013704XX 16 40 cm Description Part Number Reflector Side Extension 013704XX ...

Page 42: ... Installation Step 7 6 3 Grille Installation Silicone Cap Grille Finger Description Part Number Grille Section 08050001 Grille End Cap 08050002 Silicone Cap 91915951 6P NOTE Protective grille available for use with standard reflector ONLY Bend up 90 Pull outward Grille Grille End Cap A B C D Grille Grille End Cap Reflector Final Grille Section 40 101 cm ...

Page 43: ...ted adjacent to public walkways Vent terminal must be installed at a height sufficient to prevent blockage by snow and building materials protected from degradation by flue gasses Secure all joints with 8 x 3 8 sheet metal screws Seal all joints with high temperature silicone sealant Vent terminal must be beyond any combustible overhang 8 1 1 United States Requirements Vent must terminate at least...

Page 44: ...ign shall not incorporate backdraft flap FIGURE 24 Tube Termination 8 6 Length Requirements The maximum vent length allowed is 45 13 7 m The maximum outside air supply duct length allowed is 45 13 7 m The total vent length plus outside air duct length plus any extensions to minimum heat exchanger lengths cannot exceed 65 19 8 m Vent length should be limited to less than 20 6 m If using vent length...

Page 45: ... place replace combustion blower and tighten locknuts previously removed in step A Step C Apply silicone sealant around Combustion Air Weather Vent flange Carefully align 6 pre drilled holes on weather vent flange to 6 holes on access door Tighten 6 set screws previously removed in step 2 to secure weather vent to burner door Step D Reinstall access door and tighten wing nuts Lock Nuts Set Screws ...

Page 46: ... Vent Cap Vent Adapter Vent Terminal Burner Tube Vent Out Wall Indoor Vented and Unvented Vent Adapter Burner Tube Wall Fresh Air In Burner Burner Burner Vent Terminal Vent Cap Burner Tube Burner Vent Cap Vent Cap 4 10 cm Single Wall Pipe Vent Adapter Vent Terminal Combustible or Non Combustible Wall Vent Adapter 18 46 cm Min Vent Terminal 4 10 cm Single Wall Pipe Non Combustible Wall Only SIDE VI...

Page 47: ...l Venting Requirements Maximum of two heaters can be commonly vented through a side wall Heaters must be of the same BTU output Heaters must be controlled by a common thermostat Description Part Number Vent Cap 4 10 cm 90502300 Description Part Number Vent Terminal 6 15 cm 90502101 ...

Page 48: ...ing Requirements Maximum of four heaters can be commonly vented through the roof Heaters must be of the same BTU output Heaters must be controlled by a common thermostat Connections to a common stack must be posi tioned to avoid direct opposition between streams of combustion gases ...

Page 49: ... pre vent condensation on the outer surface The outside air terminal must not be more than 1 31 cm above the vent termination while maintaining a minimum distance of 3 93 cm for both vertical and horizontal venting 8 11 1 Length Requirements Follow the constraints listed on Page 38 Section 8 6 8 11 2 Vertical Outside Air Supply for Single Heater Installation 8 11 3 Horizontal Outside Air Supply fo...

Page 50: ...r Installation Requirements Heaters must be controlled by a common thermostat 8 11 5 Horizontal Outside Air Supply for Double Heater Installation Requirements Heaters must be controlled by a common thermostat Description Part Number Vent Cap 6 15 cm 90502302 Description Part Number Vent Cap 6 15 cm 90502302 ...

Page 51: ...Steel Gas Hose US models supplied with the heater is certi fied per the Standard for Connectors for Gas Appli ances ANSI Z21 24 CSA 6 10 latest revision Canada The Rubber Type 1 Gas Hose Canadian models optional with the heater is certified as being in compliance with the Standard for Elastomeric Composite Hose and Hose Couplings for Conducting Propane and Natural Gas CAN CGA 8 1 Latest revision C...

Page 52: ... Gas Hose Description Part Number 3 4 Flexible Stainless Steel Gas Hose US Models 91412204 1 2 Rubber Type 1 Gas Hose Canadian Models 91412206 3 4 Rubber Type 1 Gas Hose Canadian Models 91412207 Description Part Number High Pressure Regulator 2 psi 90207600 High Pressure Regulator 5 psi 90207601 ...

Page 53: ...w voltage terminals on each heater must be connected as shown in detail Heater must be grounded in accor dance with applicable codes United States refer to National Electrical Code NFPA 70 latest revision Canada refer to Canadian Electrical Code CSA C22 1 Part I latest revision If any of the original internal wiring must be replaced it must be replaced with wiring materials having a temperature ra...

Page 54: ...1 2 3 4 5 6 COIL COIL Black Black White Red Transformer Relay FRONT VIEW BACK VIEW Burner 1 Burner 2 N H Gnd Burner 3 N H Gnd Burner 4 Purple Red Yellow When using 1 2 burners use SPST Transformer Relay When using 3 4 burners use SPDT Transformer Relay Low Voltage Black Jumper Wire Connected Inside All Burners Description Part Number Thermostat Relay SPST 90417600K Transformer Relay SPDT 90436300 ...

Page 55: ...k jumper wire Cut the female connections off the ends of the 2 blue wires and strip the ends approximately 1 2 1 3 cm Connect these 2 wires to the thermostat wires using suitable wire connectors 10 6 Electrical Connection to Burner Box with Optional External Low Voltage Thermostat Green White Black L1 L2 Gnd Conduit Hole Burner Box Internal Wire Bundle Connect wires together with suitable approved...

Page 56: ...MOTOR BLOWER GRN BLK BLK BLK BUSHING TERMINAL 3 1 4 5 TRANSFORMER BLK GRN IGNITION MODULE YEL BRN BLUE YEL BLUE YEL WHT BLK PRESSURE SWITCH PLUG 3 1 R1 R1 YEL BLUE THERMOSTAT TO BURNER ON LED TH C1 V1 C2 S1 V2 GND 120VAC R1 120VAC 24VAC RELAY 24V PRESSURE TH V2 S1 SPARK C2 TRANSFORMER L1 GND L2 SWITCH THERMOSTAT BLOWER LINE NUETRAL R1 ELECTRODE GAP BURNER ON GAS VALVE ...

Page 57: ...mostat to lowest setting Turn OFF electric power to heater Turn OFF manual gas valve in the heater supply line 11 3 To Start Heater Turn gas valve and electric power OFF and wait five minutes for unburned gases to vent from heater Turn ON main gas valve Turn ON electric power Set thermostat to desired temperature Burner should light automatically 11 4 Pre Season Maintenance and Annual Inspection T...

Page 58: ...es Do not hang anything from or place anything on the heater Make sure nothing is lodged underneath the reflector in between the tubes or in the decorative or protective grilles included with select models Immediately remove objects in violation of the clearances to combustibles See Page 5 Section 3 Reflector Support reflector with reflector hanger and support strap Reflector must not touch tube M...

Page 59: ...ectly and secured in place if necessary Decorative grille only See Page 34 Section 7 5 and Page 36 Section 7 6 Make sure shield is installed correctly and secured in place if necessary Decorative grille only See Page 35 Section 7 5 2 Lower Clearance Shield optional The lower shield must be securely attached Inspect shield support straps and lower clearance shield anchor points See Page 34 Section ...

Page 60: ...ects liquids and vapors the minimum required clearances to combustibles away from heater Some objects will catch fire or explode when placed close to heater Cut Pinch Hazard Wear protective gear during installation operation and service Edges are sharp WARNING Failure to follow these instructions can result in death injury or property damage Burn Hazard Allow heater to cool before service Tubing m...

Page 61: ...roblem Solution 4 second steady flash at start of cycle Normal Wait for valve to open Steady on Microprocessor failure Replace module within module Three flashes Ignition lockout Recycle unit check for Lockout of module spark and valve opening and after 3 tries replace if none replace module ...

Page 62: ...HED SERIES INSTALLATION OPERATION AND SERVICE MANUAL 56 ...

Page 63: ...SECTION12 TROUBLESHOOTING 57 12 2 Manifold Gas Pressure Setting ...

Page 64: ...o help 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 54 Section 12 through Page 57 Figure 12 2 Carbon Monoxide Hazard WARNING Use only genuine ROBERTS GORDON replacement parts per this installation operation and service manual Failure to follow these instructions can result in death electri...

Page 65: ...00 2 Motor and Blower Assembly 90708600 P Air Adapter Collar Not Shown 91911700 Combustion Air Weather Vent Not Shown 03700009 3 Burner Cup Assembly 03600051 4 Igniter 90439102 5 Mica Window Assembly 02553203 6 Flame Sensor 90439300 7 Transformer 90436900K 8 Pressure Switch 80 100 125 150 175 90439803K 40 90439807K 60 90439805K LED Burner Status Light Not Shown 91316103 9 24 Vac Relay 90447140 10 ...

Page 66: ... clearances to combustibles GAS PRESSURE AT MANIFOLD Natural Gas 3 5 wc LP Gas 10 5 wc PIPE CONNECTION 1 2 NPT for 40 60 80 100 125 3 4 NPT for 150 175 DIMENSIONS Vent Connection Size 4 10 cm Outside Air Connection Size 4 10 cm Refer to figure above for dimensional information GAS INLET PRESSURE Natural Gas for 40 60 80 100 125 150 4 6 wc Minimum for 175 5 0 wc Minimum 14 0 wc Maximum LP Gas 11 0 ...

Page 67: ...nd required annual maintenance history The data plate and or serial number are removed defaced modified or altered in any way The ownership of the ROBERTS GORDON COMPLETE HED is moved or transferred This warranty is nontransferable Roberts Gordon is not permitted to inspect the damaged controller and or component parts READ YOUR INSTALLATION OPERATION AND SERVICE MANUAL If you have questions about...

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