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 instructions. 8. If you cannot reach your gas supplier, call the Fire Department.
TABLE OF CONTENTS SECTION 1: Heater Safety...................................................... 1 1.1 Manpower Requirements ............................................. 1 1.2 Safety Labels and Their Placement ............................. 1 1.3 California Proposition 65 .............................................. 1 SECTION 2: Installer Responsibility ..................................... 4 2.1 Wall Tag ....................................................................... 4 2.2 Corrosive Chemicals....
TABLE OF FIGURES Figure 1: Top and Bottom Panel Label Placement .................... 2 Figure 2: Side and Back Panel Label Placement ...................... 3 Figure 3: Standard Reflector ..................................................... 5 Figure 4: One Side Reflector..................................................... 6 Figure 5: Two Side Reflectors ................................................... 6 Figure 6: 45° Tilt Reflector ........................................................
SECTION 1: HEATER SAFETY 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 contractor qualified in the installation and service of gas-fired heating equipment.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL FIGURE 1: Top and Bottom Panel Label Placement Logo Label Rating Plate Label Bottom Panel Proposition 65 Label Description Logo Label Rating Plate Label Gas Connection Label Proposition 65 Label 2 of 71 Part Number 91013212 91010401 91018122 91070015 Top Panel Gas Connection Label
SECTION 1: HEATER SAFETY FIGURE 2: Side and Back Panel Label Placement Control Side Panel Clearances to Combustibles Label Control Side Panel (Inside) N.O.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL SECTION 2: INSTALLER RESPONSIBILITY The installer is responsible for the following: • To install the heater, as well as the gas and electrical supplies, in accordance with applicable specifications and codes. Roberts-Gordon LLC recommends the installer contact a local Building Inspector or Fire Marshal for guidance.
SECTION 3: CLEARANCES TO COMBUSTIBLES SECTION 3: CLEARANCES TO COMBUSTIBLES 3.1 Required Clearances to Combustibles Clearances are the required distances that combustible objects must be away from the heater to prevent serious fire hazards. Combustibles are materials, that may catch on fire and include common items such as wood, paper, rubber, fabric, etc. Maintain clearances to combustibles at all times for safety.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL NOTE: 1. All dimensions are from the surfaces of all tubes, couplings and elbows. 2. Clearances B, C and D can be reduced by 50% after 25' (7.5 m) of tubing downstream from where the burner and burner tube connect.
SECTION 3: CLEARANCES TO COMBUSTIBLES NOTE: 1. All dimensions are from the surfaces of all tubes, couplings and elbows. 2. Clearances B, C and D can be reduced by 50% after 25' (7.5 m) of tubing downstream from where the burner and burner tube connect.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL NOTE: 1. All dimensions are from the surfaces of all tubes, couplings and elbows. 2. Clearances B, C and D can be reduced by 50% after 25' (7.5 m) of tubing downstream from where the burner and burner tube connect.
SECTION 4: NATIONAL STANDARDS AND APPLICABLE CODES SECTION 4: NATIONAL STANDARDS AND APPLICABLE CODES 4.1 Gas Codes The type of gas appearing on the nameplate must be the type of gas used. Installation must comply with national and local codes and requirements of the local gas company. United States: Refer to National Fuel Gas Code NFPA 54/ANSI Z223.1 - latest revision. Canada: Refer to Natural Gas and Propane Installation Code CSA B149.1 - latest revision. 4.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL SECTION 5: MAJOR COMPONENTS FIGURE 13: Major Component Descriptions Burner with Tube Gasket Must be installed with the flame observation window facing down. Burner Tube Supplied in 10' (3 m) lengths. Burner tube is always the first tube after the burner. Tube and Reflector Hanger with Clamp Package Position this hanger no more than 4" (10 cm) away from the burner. Tube and Reflector Hanger Suspend system from these hangers.
SECTION 5: MAJOR COMPONENTS 5.1 Standard Parts List Table 1: Contents of Burner Carton Part No.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL SECTION 6: HEATER INSTALLATION WARNING Severe Injury Hazard Secure burner to burner tube with bolts and lockwashers. Hang heater with materials with a minimum working load of 75 lbs (33 kg). Failure to follow these instructions can result in death, injury or property damage. WARNING Cut/Pinch Hazard Wear protective gear during installation, operation and service. Edges are sharp. Failure to follow these instructions can result in injury.
SECTION 6: HEATER INSTALLATION FIGURE 14: Critical Hanger Placement Typical Suspension Details Beam Clamp Anchor Screw Hook 3/8" 24" min.
14 of 71 Reflector Support Tube and Reflector Hanger Coupling Burner Tube Tube Clamp Package Burner Reflector End Cap Reflector Vent Adapter Tube Turbulator (With Select Models) U-Clips CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL FIGURE 15: Linear Heater Assembly Overview
SECTION 6: HEATER INSTALLATION FIGURE 16: Linear Heater Layout Overview LEGEND g Burner Reflector b c d e f 20' (6 m) Tube Length Tube Tube/Reflector Hanger g b c d e e Coupling Assembly Vent Adapter f a = 14" (36 cm) reflector width (not shown) 30' (9 m) Tube Length b = 2" (5 cm) end cap to burner g c = 2" (5 cm) end cap to hanger b c d e e e f d = 7'6" (229 cm) distance first hanger 40' (12 m) Tube Length e = 10' (305 cm) distance between hangers g f = 9.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL Step 6.1 Burner Tube Installation NOTE: Tubing requires a downward slope of 1/2" (1.3 cm) per 20' (6 m) away from burner. Offset mounting hole must be to the top. S-hook Hanger Burner Tube Weld seam must be to the bottom of the tube. 7' 6" ± 1' (229 cm ± 25 cm) Description Burner Tube S-Hook Tube/Reflector Hanger Part Number 03051XXX 91907302 03090100 Step 6.
SECTION 6: HEATER INSTALLATION Step 6.3 Coupling and Tube Assembly Close coupling with tab. A Slide bar/Coupling B Start Lock. Tab Slide Bar/Coupling Lock Wide End Coupling Open 3" (8 cm) to 4" (10 cm) Closed C Insert tubes into coupling. D Tighten coupling to join tubes. Slide Bar/Coupling Lock Coupling Orient coupling so that the impact block is in the 2:00 or 10:00 oclock positions.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL Step 6.3.2 Coupling and Tube Assembly (Continued) Model CTH3-80 CTH3-115 CTH3-150 CTH3-200 Tube Length Minimum 20' (6 m) 30' (9 m) 40' (12 m) 50' (15 m) 7' 6" ± 1' (2.3 m ± .25 m) 10' ± 1' (3 m ± .25 m) Total Overall Tube Length Step 6.4 Turbulator Installation Turbulator must be installed in the last standard section of tube. Turbulator is not required on the CTH3-200.
SECTION 6: HEATER INSTALLATION 6.5 Reflector Installation WARNING Fire Hazard Support reflector with reflector hanger and support strap. Reflector must not touch tube. Failure to follow these instructions can result in death, injury or property damage. NOTE: All tube surfaces must be covered by a reflector, except for a U-Tube.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL Step 6.5.1 Reflector, U-Clip and Reflector Support Installation The pictorial drawings of the heater construction in reflector supports and U-clips depends on the Section 6 are schematic only and provide a general individual installation. Use either pop rivets or sheet guideline of where hangers, reflector supports and metal screws instead of u-clips when installing end U-clips are to be installed.
SECTION 6: HEATER INSTALLATION Step 6.6 Burner Installation Burner Gasket S-hook Burner Tube Burner must be installed with the flame observation window facing down. Description Bolt Burner Lock Washer Gasket Part Number 94273914 034XXXXX 96411600 02568200 Lock Washer Bolt (Torque 120 in/lb 13.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL SECTION 7: OPTIONAL HEATER ACCESSORIES WARNING Cut/Pinch Hazard Wear protective gear during installation, operation and service. Edges are sharp. Failure to follow these instructions can result in injury. 7.1 U-Tube Configuration Heaters are approved for optional U-Tube configurations. The U-Tube may be installed in either a standard horizontal position, a 45° position or in an opposite 45° position as shown on Page 7, Figure 7 through Figure 9.
SECTION 7: OPTIONAL HEATER ACCESSORIES FIGURE 17: U-Tube Heater Assembly Overview 23 of 71
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL FIGURE 18: U-Tube Heater Layout Overview LEGEND g b c e Burner Reflector h 20' (6 m) Tube Length* Tube 10' (3 m) g Tube 5' (1.
SECTION 7: OPTIONAL HEATER ACCESSORIES 7.2 Elbow Package Configuration Step 7.2.1 Elbow Installation Tube Coupling Description Elbow Package 90° Elbow Coupling Reflector End Cap Reflector Joint Piece U-Clip Package Part Number 02718702 01335801 01312700 02750800 02750900 91107720 90° Elbow Minimum Distance Required Between Burner and Elbow Minimum Model Distance CTH3-80 10' (3m) CTH3-115 CTH3-150 15' (4.5m) CTH3-200 Step 7.2.2 Elbow Installation Tube Coupling Step 7.2.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL Step 7.2.4 Reflector Joint Installation Step 7.2.
SECTION 7: OPTIONAL HEATER ACCESSORIES 7.3 Reflector Side Extension Step 7.3.1 Bracket Installation Tube Reflector Tube and Reflector Hanger Reflector Support Reflector Side Extension Bracket (2 per Reflector) Use additional supports in high air movement applications. Description Reflector Side Extension Package Reflector Side Extension Retainer Clips Sheet Metal Screws Part Number 02712700 01368000 02751200 94118106 Order Separately Reflector Side Extension Bracket 01329910 Step 7.3.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL 7.4 Lower Clearance Shield Installation Step 7.4.1 Shield Support Strap Assembly Reflector 17" (43 cm) 12" (30 cm) Align Pilot Holes Lower Clearance Shield Locknuts Washers Screws Description Lower Clearance Shield Package Shield Support Strap Lower Clearance Shield 8' Locknut #8 Flat Washer #8 Screw #8 x 3/8" Part Number 01397501 01397500 02793000 92311400 95310800 93511406 7.5 Two-Foot Decorative Grille Installation Step 7.5.
SECTION 7: OPTIONAL HEATER ACCESSORIES Step 7.5.2 Frame Shield Installation Description Deco Grille Shield Part Number 01365900 Step 7.5.3 Reflector Side Extension Installation for Decorative Grilles Distance "A" Minimum Maximum 2" (4 cm) 6" (15 cm) 6" (15 cm) 10" (26 cm) 10" (26 cm) 14" (37 cm) Extension Part No.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL 7.6 Protective Grille Installation Step 7.6.1 Silicone Cap Installation Silicone Cap Description Grille Section Grille End Cap Silicone Cap Grille Finger Part Number 08050001 08050002 91915951-6P Step 7.6.2 Grille End Cap Installation B A Grille Grille End Cap C D Bend up 90°. Pull outward. Step 7.6.
SECTION 8: VENTING SECTION 8: VENTING WARNING Carbon Monoxide Hazard Heaters installed unvented must be interlocked with sufficient building exhaust. Heaters must be installed according to the installation manual. Failure to follow these instructions can result in death or injury. WARNING Vent pipe must be sloped downward away from the burner 1/2'' (1 cm) for every 20' (6 m). The heater may be individually vented or common vented.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL 8.3 Horizontal Venting In noncombustible walls only, vent terminal (P/N 02537801-1P) may be used. FIGURE 20: Tube Termination For 4" (10 cm) vents in either combustible or noncombustible walls, use Tjernlund VH1-4 (P/N 90502100) or equivalent, insulated vent terminal. Follow the manufacturer's instructions for proper installation.
SECTION 8: VENTING 8.8 Vertical Ventilation 4" (10 cm) Pipe Description Vent Cap 4" (10 cm) Part Number 90502300 8.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL 8.10 Common Vertical Venting 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 positioned to avoid direct opposition between streams of combustion gases.
SECTION 8: VENTING 8.11 Outside Combustion Air Supply IMPORTANT: If the building has a slight negative pressure or corrosive contaminants such as halogenated hydrocarbons are present in the air, an outside combustion air supply to the heater is required. Seal all combustion air pipe joints. The air supply duct may have to be insulated to prevent condensation on the outer surface. The outside air terminal must not be more than 1' (31 cm) above the vent terminal.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL 8.11.4 Vertical Outside Air Supply for Double Heater Installation SIDE VIEW Vent Cap Roof For 80 and 115 models, 6" (15 cm) Single Wall Pipe. For 150 or 200 models, 7" (18 cm) Single Wall Pipe. Flex Hose (Recommended) Burner Band Clamp (Recommended) Description Vent Cap 6" (15 cm) Sweeping 'T' Connection Burner For 80 and 115 models, 4" (10 cm) Single Wall Pipe. For 150 or 200 models, 5" (13 cm) Single Wall Pipe.
SECTION 9: GAS PIPING SECTION 9: GAS PIPING WARNING Fire Hazard Tighten gas hose fittings to connect gas supply according to Figure 21. Gas hose can crack when twisted. Gas hose moves during normal operation. Use only 36" (91 cm) long connector of 1/2" or 3/4" nominal ID. Connector supplied with heater for U.S. models (not with Canadian models). Failure to follow these instructions can result in death, injury or property damage. WARNING There is an expansion of the tube with each firing cycle.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL FIGURE 21: Gas Connection with Flexible Gas Hose CORRECT POSITIONS CAUTION Product Damage Hazard Shut-Off Valve (included with gas hose) must be parallel to burner gas inlet. The 3" (8 cm) displacement shown is for the cold condition. This displacement may reduce when the system is fired. Hold gas nipple securely with pipe wrench when attaching gas hose. Failure to follow these instructions can result in product damage.
SECTION 10: WIRING SECTION 10: WIRING DANGER Electrical Shock Hazard Disconnect electric before service. Heater must be properly grounded. Failure to follow these instructions can result in death or electrical shock. Heater must be grounded in accordance 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.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL 10.2 Central and Satellite Heaters (Zoning Capability) The heater can be configured so that several heaters 10.2.1 Central Heater Configuration within the same heating zone will modulate Central heater configuration is set by positioning of simultaneously with connection to a single heat jumpers on pin blocks (J10 and J9) located on the demand control device.
SECTION 10: WIRING 10.2.2 Satellite Heater Configuration Satellite heater configuration is set by positioning of jumpers on pin block J10 located on the control board inside the heater compartment, See Page 41, Figure 24. Jumper position on J10, shown on Page 41, Figure 24 will configure heater as a satellite heater. (The jumper position for satellite is the same as the jumper position of a central heater using a zone sensor). Jumper on J9 may be left alone.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL 10.3 Communication Wiring within a Zone of Heaters Satellite heaters will be wired in series to the central Communication wiring uses the T28-T31 terminals heater via low voltage control wiring. on the control, see Page 42, Figure 25.
SECTION 10: WIRING 10.3 Communication Wiring within a Zone of Heaters (continued) Satellite heaters will be wired in series to the central heater via low voltage control wiring. Communication wiring uses the T28-T31 terminals on the control, See Page 42 through Page 43, Figure 25.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL 10.4 Heat Demand Control Wiring The heater input can be controlled by any one of the following heat demand control devices (control devices are wired to central heaters only): 10.4.1 Zone Sensor The zone sensor (P/N 10081530) offers automatic control of heater input. Heater(s) modulates based on difference between sensed air temperature and the temperature setpoint. Heater modulation in response to air temperature changes is immediate.
SECTION 10: WIRING 10.4.3 Analog Signal Modulating Thermostat (P/N 90425105) A programmable, 7-day programming, modulating thermostat can be installed to supply an analog (420mA) or (2-10Vdc with 500 Ohm resistor) control signal to dictate the heater(s) firing rate. The thermostat shall energize the T24 and T25 (R and W) terminals. For thermostat wiring, See Page 49, Figure 29 and Page 50, Figure 30. Optional room sensors (P/N 10081520) and outdoor air sensors (P/N 10081521) are available.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL 10.4.7 Cable Termination Table lists wiring types, sizes and distances for modulating thermostat with LonWorks communication (P/N 90425104), modulating thermostat without communication (P/N 90425105) and BACnet programmable thermostat (P/N 90425109) ® ® Table 4: Cable Requirements Wire Function Recommended Wire Size (Minimum) Digital Outputs Modulating Outputs Outdoor Air Temperature Sensor Remote Sensor 18 AWG (0.75 sq mm) 18 AWG (0.
SECTION 10: WIRING For 4-20mA control of the heater(s) firing rate, the following control conditions apply: ON/OFF relay at the external controller or BMS must be wired to R and W terminals on the heater control board to turn the heater ON and OFF. (Open Circuit = OFF, Closed Circuit = ON). Minimum rated input at 1% of signal (0-4 mA). Full rated input at 90% of signal (18 mA). Input varies linearly between 4 mA and 18 mA. 2.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL 10.4.9 Potentiometer Control Device Potentiometer (10K Ohm"Linear Taper") device offers manual control over heater(s) firing rate. This type of potentiometer can be found at Radio Shack . Potentiometer dial position directly dictates heater(s) firing rate. Dial positions range between "Min" and "Max". Minimum and maximum heater firing rates (inputs) are marked on the heater's rating plate.
SECTION 10: WIRING ® FIGURE 29: Modulating Thermostat Wiring Diagram (LonWorks [4-20 mA] optional) ® NOTE: 1. For non-communicating thermostats without LonWorks bus, thermostat terminals marked "EB" will be marked "_____" and no LonWorks bus communication wires are used. ® * Separate on/off switch is optional for "satellite" heaters (install at user level). On/Off switch is used to disable heater operation or reset a heater that is in "lockout" mode.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL ® FIGURE 30: Modulating Thermostat Wiring Diagram (LonWorks [2-10Vdc with 500 Ohm resistor] optional) ® NOTE: 1. For non-communicating thermostats without LonWorks bus, thermostat terminals marked "EB" will be marked "_____" and no LonWorks bus communication wires are used. ® * Separate on/off switch is optional for "satellite" heaters (install at user level).
SECTION 10: WIRING ® FIGURE 31: Modulating Thermostat Wiring Diagram with BACnet (optional) NOTES: 1. A jumper is pre-installed between phase R(24VAC) and SC1-3 (24VAC Relay). 2. Ground ONLY ONE END of the shielded cable. * Separate on/off switch is optional for "satellite" heaters (install at user level). On/Off switch is used to disable heater operation or reset a heater that is in "lockout" mode. If on/off switch is not desired, leave jumper wire between R and W terminals in place.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL 10.5 Internal Wiring See Page 39, Section 10.1 through Page 48, Section 10.4.9 for temperature control device options and wiring schematic.
SECTION 10: WIRING 10.6 Ladder Diagram L2 L1 120V BLK WHT 24V GAS VALVE YEL BLU BRN BRN WHT PRP BRN BLK ORG BLU DOOR SWITCH GRN GRN BLU BLU BLU BLU BLK MOTOR BLU AIR SWITCH BLK WHT CONTROL BLK BLK WHT HOT SURFACE IGNITER FLAME SENSOR See Page 39, Section 10.1 through Page 48, Section 10.4.9 for temperature control device options and wiring schematic.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL 10.7 Line Voltage Power Wiring Burner 1 Burner 2 Gnd. 120 V-60 Hz Supply Circuit H L1 L2 Gnd. N Burner 3 Gnd. H N Gnd. H NOTE: The burners must have an uninterrupted 120 V, 60 Hz, 1 Ø power supply. 10.8 Electrical Connection to the Burner Electrical Cord or Flexible Conduit BX or Romex Connector Burner 54 of 71 N Connect wires together with suitable approved wire connectors.
SECTION 10: WIRING 10.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL SECTION 11: OPERATION AND MAINTENANCE WARNING DANGER Electrical Shock Hazard Disconnect electric before service. Explosion Hazard Turn off gas supply to heater before service. Heater must be connected to a properly grounded electrical source. Burn Hazard Allow heater to cool before service. Cut/Pinch Hazard Wear protective gear during installation, operation and service. Tubing may still be hot Edges are sharp. after operation.
SECTION 11: OPERATION AND MAINTENANCE service or maintenance. Allow heater to cool before servicing. Before every heating season, a contractor qualified in the installation and service of gas-fired heating equipment must perform a thorough safety inspection of the heater. For best performance, the gas, electrical, thermostat connections, tubing, venting, suspensions and overall heater condition should be thoroughly inspected.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL Gas Line Burner Observation Window Blower Scroll, Wheel and Motor Burner Cup and Orifice Check for gas leaks. See Page 37, Section 9. Make sure it is clean and free of cracks or holes. Clean and replace as required. Compressed air or a vacuum cleaner may be used to clean dust and dirt. Clear of obstructions (even spider webs will cause problems). Carefully remove any dust and debris from the burner. Replace if cracked or broken.
SECTION 12: TROUBLESHOOTING SECTION 12: TROUBLESHOOTING DANGER Electrical Shock Hazard Disconnect electric before service. More than one disconnect switch may be required to disconnect electric from heater. Heater must be properly grounded to an electrical source. Failure to follow these instructions can result in death or electrical shock. WARNING Fire Hazard Keep all flammable objects, liquids and vapors the minimum required clearances to combustibles away from heater.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL 12.1 Control LED The control inside the heater's control compartment is equipped with a tri-color LED. The LED offers comprehensive diagnostic capability. The LED is showing some form of status signal at all times when the control is powered. The color of the LED differentiates normal from error conditions as follows: GREEN indicates normal operation. RED indicates an error condition. YELLOW (fast flashing) indicates a RETRY attempt.
SECTION 12: TROUBLESHOOTING RED, 8 flashes: Lockout- Pressure switch failed to operate or modulation current was incorrect. Condition could be caused by: • Pressure Sensor • Pressure Switch (faulty or hoses reversed) • Gas Valve Modulation Coil • Wire Harness (6 wire) RED, 9 flashes: Lockout- Air Supply.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL 12.
SECTION 12: TROUBLESHOOTING 63 of 71
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL 12.4 Manifold Gas Pressure Measurement WARNING Carbon Monoxide Hazard Do not adjust gas valve pressure regulator. Do not tamper with sealed parts. Pressure regulator is factory calibrated for safe operation. Failure to follow these instructions can result in death or injury.
SECTION 12: TROUBLESHOOTING 12.
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL SECTION 13: REPLACEMENT PARTS WARNING DANGER Electrical Shock Hazard Explosion Hazard Fire Hazard Carbon Monoxide Hazard Use only genuine ROBERTS GORDON® replacement parts per this installation, operation and service manual. Failure to follow these instructions can result in death, electric shock, injury or property damage.
SECTION 13: REPLACEMENT PARTS 67 of 71
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL Description Gas Valve (Natural) Gas Valve (LP) Tube Gasket Blower Inlet Gasket (80, 115 models) Blower Inlet Gasket (150, 200 models) Blower Assembly (80, 115) Blower Assembly (150, 200) Air Collar (80, 115 models) Air Collar (150, 200 models) Inlet Screen (80, 115) Inlet Screen (150, 200) Door Switch Burner Cup Assembly Hot Surface Igniter Mica Window Assembly Flame Sensor Transformer Fuse (Control) 3 A Pressure Switch (80 NG, 80 LP, 115 NG, 115 LP) (
SECTION 14: GENERAL SPECIFICATIONS SECTION 14: GENERAL SPECIFICATIONS 14.1 Material Specifications 14.1.1 Reflectors .024 Aluminum (Optional .024 Stainless Steel Type 304) 14.2 Heater Specifications 14.2.1 Control System Modulating Gas Valve and Hot Surface Electronic Ignition Control with Four-try, 100% shut-off, Prepurge, Post-Purge, Auto Reset, Tri-color LED Status/Fault Indicator. 14.3 Suspension Specifications Hang heater with materials with a minimum working load of 75 lbs (33 kg).
CTH3-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL 70 of 71
® ® SECTION 15: THE ROBERTS GORDON VANTAGE MODULATING WARRANTY SECTION 15: THE ROBERTS GORDON VANTAGE MODULATING WARRANTY ROBERTS-GORDON WILL PAY FOR: ® ® Within 36 months from date of purchase by buyer or 42 months from date of shipment by Roberts-Gordon LLC (whichever occurs first), replacement parts will be provided free of charge for any part of the product which fails due to a manufacturing or material defect. Roberts-Gordon LLC will require the part in question to be returned to the factory.