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QTD2

 Series

37

5.0

 Maintenance

 

•

 Troubleshooting Guide

*

NOTICE

Bypassing any switch is intended for testing purposes only.  Do not leave switch bypassed 
during normal operation or the heater’s built-in safety mechanisms will be compromised.

Key

Start 

Question

Process

Question

Corrective

Action

Is there 120V on the 

common side of the 

post purge relay?

Yes

No

Find source of electrical problem 

between the power cord and fan relay.

Is there 120V on the 

N.O. side of the post 

purge relay?

Yes

The blower assembly 

is faulty and must be 

replaced.

No

The post purge relay 

is faulty and must be 

replaced.

Is there 24V across 

the “W” and “GND” 

terminals on the 

circuit board?

No

Repair faulty wiring.

Check both high temperature spark 

wires and both electrodes.  If good, 

replace circuit board.

Yes

Check for loose wiring or restrictions 

in the hose connections to pressure 

switches.  Are they OK?

No

Replace wiring or hose connections.

Replace the pressure switch after verifying:
•  Heater, fan blowers ,squirrel cage, intake 

and exhaust are clean and free from dirt and 

obstructions.

•  The 4” air intake pipe does not exceed 30 ft. and/or 

2 elbows.

•  There is not a negative pressure experienced at 

the area of air intake (e.g.; high winds, attic space, 

tightly sealed building). May vary for agricultural 

buildings (consult factory).

Yes

Содержание QTD2-60N

Страница 1: ...the home sleeping quarters attached garages etc Installation of a commercial tube heater system in residential indoor spaces may result in property damage serious injury asphyxiation or death QTD2 Series Installation Manual The QTD2 Series Infrared Tube Heater is a negative pressure two stage radiant heater system This manual provides specific information related to the QTD2 Series model All perso...

Страница 2: ... and Weights 12 Heater Assembly 13 Installing the Reflector Assembly 14 Preparing Points for Hanging 15 Hanging the Pre Assembled Unit 16 Venting 18 Combustion Air Requirements 24 Gas Supply Installation Instructions 26 Installation of the Gas Line to the Heater 28 Leak Testing 30 Electrical Requirements and Wiring 31 Field Wiring Supply Voltage 31 Thermostat Connection 32 4 0 Operation 34 Start u...

Страница 3: ...etc are the responsibility of the installer Notify your product representative or Detroit Radiant Products of any discrepancy or missing kit contents prior to installing the heater Specifications Chart 1 1 QTD2 Series Specifications Recommended mounting heights are provided as a guideline Actual conditions may dictate variations from this data 1 0 Introduction Overview Heater Components Specificat...

Страница 4: ...MMERCIAL INDUSTRIAL USE FOR INDOOR USE ONLY MADE IN U S A 80 000 50 000 CATEGORY III 2 4 SINGLE 60 120 10 0 14 0 11 0 49 D M S 57 D M S ANSI Z83 20b 2011 CSA2 34B 2011 RADIANT TUBE HEATER C1 PROPANE AGA 7 89 RESIDENTIAL RADIANT TUBE HEATER QTD2 80P YYMMREPCSHIPPE 01 16 Rear Panel F N LL001 Clearance Safety Tag Affix adjacent to heater s thermostat Rating Plate F N LLTB052 SAM PLE LLTB014 5M 11 16 ...

Страница 5: ...IEW This heater must be installed and serviced by trained gas installation and service personnel only The installation of this heater must conform with local building codes or in the absence of such codes the National Fuel Gas Code NFPA 54 ANSI Z223 1 These applications must comply with Parking Structures ANSI NFPA 88A Repair Garages ANSI NFPA 30A Aircraft Hangars ANSI NFPA 409 Side Side Below Rea...

Страница 6: ...service this equipment Not For Residential Use Do not use this heater in the home sleeping quarters attached garages etc Installation of a commercial tube heater system in residential indoor spaces may result in property damage serious injury or death WARNING Read and understand all safety information and warnings in this manual prior to installation operation and maintenance of this heater Warnin...

Страница 7: ...test edition of the Standard for Aircraft Hangars ANSI NFPA 409 In Canada refer to CAN CSA B149 1 In aircraft storage and servicing areas heaters shall be installed at least 10 ft from above the upper surface of wings or of the engine enclosures of the highest aircraft that may be housed in the hangar The measurement shall be made from the wing or engine enclosure whichever is higher from the floo...

Страница 8: ...ead doors and tracks Dirty or contaminated environments Gas and electrical lines Combustible and explosive materials Chemical storage areas Areas of high chemical fume concentrations Provisions for accessibility to the heater Adequate clearances around air openings Combustion and ventilating air supply Common Hazards For maximum safety the building must be evaluated for hazards before installing t...

Страница 9: ...ce to Combustibles Mount Heater Level Side to Side END VIEW SIDE VIEW Mount Heater Level Front to Back REAR VIEW Showing Pitched Roof Installation Side Side Below Top End Below Top Back 10 36 36 40 WARNING Failure to comply with the stated clearances to combustibles may result in personal injury property damage and or death Failure to mount the appliance level may result in personal injury propert...

Страница 10: ...hen heated materials high in hydrocarbons solvents paint thinner mineral spirits formaldehydes etc can evaporate This may result in odors or fumes being emitted into the environment To correct this problem clean the area and or introduce additional ventilation Heaters installed and serviced in accordance with the installation manual do not emit odors into the environment IMPORTANT Fire sprinkler h...

Страница 11: ...al heat per square foot to comfortably heat these areas Clearances to Combustibles must always be maintained Chart 2 1 page 9 NOTE This chart is provided as a guideline Actual conditions may dictate variations from this data Figure 3 1 Application Guidelines Dim A Dim B Dim A DIM A Distance from heater to wall 8 ft to 20 ft DIM B Distance between heaters 12 ft to 28 ft NOTE Dimensions A B are base...

Страница 12: ...force and weight of the heater Failure to maintain minimum clearance to combustibles may result in fire and or explosion property damage serious injury or death Always maintain minimum clearances QTD2 Series 12 3 0 Installation Hanging the Heater High humidity or saltwater atmospheres will accelerate heater corrosion and reduce useful life Do not install the heater in locations where water in the ...

Страница 13: ...nstall the factory supplied vent hood using the 3 screws provided Reflector Sub Assembly 1 On a flat surface lay out two reflectors parallel to each other 2 Place U end reflector end cap at one end and burner reflector end cap at the opposite end with the over under tabs facing the reflector 3 Move the reflector end caps into the reflector ends while aligning the over tabs larger tabs with holes o...

Страница 14: ...burner reflector end cap with 2 5 16 18 keps nuts see Detail D Note The burner reflector end cap does not have a tab with slots 4 Secure the U end reflector end cap using the red shoulder screws provided see Detail E 5 Repeat process with remaining reflector assembly Installing the Reflector Assembly DETAIL D Secure burner reflector end cap TP 6085A with 2 5 16 18 keps nuts per assembly DETAIL E S...

Страница 15: ...hreaded rod and turnbuckles may be used NOTE The unit must be in straight alignment and level Adjust chain lengths until radiant tubing is level and equal weight distribution is achieved Chains must be straight up and down Do not install chains at an angle as this can result in tube warpage or separation Preparing Points for Hanging Figure 3 5 Hanging Types Wood Beam I Beam I Beam Concrete Beam Su...

Страница 16: ...anually or with a winch system 2 Attach two chains to exchanger connection hanging bracket TP 6079 Secure S hooks 3 Attach the third chain located furthest from the gas and electrical connections to the reflector end assembly TP 6089A and secure S hook 4 Raise or lower the unit to desired mounting height Hanging the Pre Assembled Unit Figure 3 6 Hanging the Heater ...

Страница 17: ...vel across the length Figure 3 7 2 Check the unit for level across the width Figure 3 8 Figure 3 7 Hanging the Heater Side View Figure 3 8 Hanging the Heater Burner Box Back View Figure 3 9 Hanging the Heater End View 12 25 12 75 11 5 7 7 12 75 2 88 5 13 8 Mount Heater Level Front to Back Mount Heater Level Side to Side ...

Страница 18: ... field supplied and three 3 8 sheet metal screws field supplied Do not use more than two 2 90 elbows in the exhaust vent To maintain clearances to combustibles the use of an approved wall or roof thimble and double wall Type B vent is required for the portion of vent pipe that runs through combustible material in the building wall or roof see Figures 3 11 3 13 Gas fired heaters must be vented A bu...

Страница 19: ...interlocked with the electrical supply line to the heaters enabling both to function simultaneously Exhaust openings for removing the flue products must be located above the level of the heater s WARNING Not for residential use The use of unvented radiant tube heaters in residential indoor spaces may result in property damage serious injury or death Use unvented operation in commercial and industr...

Страница 20: ...1 4 in per foot of length Do not pitch the heater Vent must extend beyond any combustible overhang if the vent is less than 36 in below the combustible overhang Figure 3 11 Sidewall Venting Requirements Building Overhang Sidewall Double Wall B Vent Single Wall Vent Vent Adapter Vent Collar Wall Thimble Sidewall Vent Cap 6 in min B to C Adapter Heater 1 4 in downward pitch per foot 36 in min ...

Страница 21: ...ng Vents adjacent to public walkways must terminate a minimum of 7 ft 2 1 m above grade level The vent terminal must be installed to prevent blockage by snow and protect building materials from degradation by flue gases The vent cap must be a minimum of 6 in 15 2 cm from the sidewall of the building Vent must be a minimum of 36 in below or extend beyond any combustible overhang Canada Vents must t...

Страница 22: ...inal must extend a minimum of 2 ft 6 m above the roof Figure 3 12 Rooftop Venting Side View Consult the NFPA ANSI Z223 1 Gas Vent Termination criteria if roof pitch exceeds 9 12 Vent Cap Double Wall B Vent Pipe Firestop Spacer Single Wall Elbow or Alternate Tee Fitting B to C Adapter Roof 24 in Min Heater Single Wall Vent field supplied Storm Collar Adjustable Roof Flashing 1 in Minimum Clearance ...

Страница 23: ...ne heater do not flow into the adjoining vent of the other heater 6 in diameter double wall Type B vent and 6 in vent cap must be used Common vented heaters must be controlled with the same thermostat Do not operate individually Consult the NFPA ANSI Z223 1 Gas Vent Termination criteria if roof pitch exceeds 9 12 Rooftop Vent Cap Roof Dual Exhaust Assembly Heater Double Wall B Vent 24 in Min Heate...

Страница 24: ...on rates Non contaminated outside air for combustion must be ducted to the heater if any of the following apply Chemicals such as chlorinated or fluorinated hydrocarbons typical sources are refrigerants solvents adhesives degreasers paints paint removers lubricants pesticides etc High humidity Contaminants such as sawdust welding smoke etc Negative building pressure Unusually tight construction wh...

Страница 25: ...nnection Flexible boot and band clamps are recommended NOTE Common intake heaters must share the same thermostat Figure 3 16 Vertical Outside Air Supply for Common Heater Intake Side View Roof Roof Intake Cap 18 in Minimum 6 pipe Air Inlet Connection Flexible boot and band clamps are recommended Air Inlet Connection Burner Box Burner Box 4 intake pipe 4 intake pipe Burner Box ...

Страница 26: ...h the local and national requirements for type and volume of gas handled and pressure drop allowed in the line Avoid pipe sizes smaller than 1 2 The installation must conform with local building codes or in the absence of such codes the National Fuel Code NFPA 54 and in conjunction with ANSI Z21 24 CSA 6 10 Connectors for Gas Appliances 4 in 20 ft 4 in single 6 in dual 20 ft 5 in 30 ft 4 in single...

Страница 27: ... pressures If utilizing used pipe verify that its condition is clean and comparable to a new pipe Test all gas supply lines in accordance with local codes To connect the gas When connecting piping to the unit the use of a thread joint compound is required The thread compound pipe dope shall be resistant to the action of liquefied petroleum gas or any other chemical constituents of the gas to be co...

Страница 28: ...pply line The manual shut off ball valve must be located within 6 feet of the appliance s service access door 3 Install the 5 8 inch flare to 1 2 NPT adapter piece downstream of the ball valve as shown in Figure 3 18 This piece is typically included with the flexible gas connector loosely installed on one of the flare nuts NOTE Keep flare surfaces clean and free of sealing compounds Only the pipe ...

Страница 29: ...ating value of 2500 BTU SCF and a Specific Gravity of 1 53 Chart 3 7 allows for a 0 3 inch W C pressure drop in the supply pressure from the building main to the inlet of the unit Refer to the chart for the appropriate range of inlet pressures for each gas type When sizing the inlet gas pipe diameter make sure that the unit supply pressure can be met after the 0 3 inch W C pressure drop has been s...

Страница 30: ... controls must never exceed 14 inch W C 1 2 PSI Supply pressures greater than 14 inch W C can damage the controls resulting in personal injury property damage or death WARNING Testing for gas leaks with an open flame or other sources of ignition may lead to a fire or explosion and cause serious injury or death Test in accordance with NFPA or local codes Chart 3 9 Maximum capacity for Schedule 40 M...

Страница 31: ... WARNING Shock hazard Disconnect power supply before making wiring connections to prevent electrical shock and equipment damage Any original factory wiring that requires replacement must be replaced with wiring material having a temperature rating of at least 105 C The power supply to the heater must be within 5 of the voltage rating as indicated on the rating plate of the appliance If input power...

Страница 32: ...he heater to freely expand and contract without causing undue strain on the wires or terminal Use 18 gauge wire or larger that is suitable for a NEC Class 2 rating for thermostat connections Each QTD2 series heater requires a two stage thermostat rated for 24VAC to operate The heater comes standard with a yellow cord for making the thermostatic connection located on the back panel N L1 PANEL GROUN...

Страница 33: ...ing this appliance Check existing wiring replace if necessary NOTE If any of the original wire supplied with the appliance must be replaced it must be replaced with wiring material having a temperature rating of at least 105 C Figure 3 21 Internal Wiring Diagram YELLOW CORD ...

Страница 34: ...llow the safety information found on the cover page under If you smell gas and on safety label affixed to the heater If you do not smell gas proceed to step 6 Turn manual shutoff knob counterclockwise to ON Turn ON all electrical power to the appliance Set thermostat to desired setting If the appliance will not operate follow instructions below to turn OFF gas to the appliance and call your servic...

Страница 35: ...to the starting sequence If flame sense is not established within 15 seconds the heater will attempt two 2 additional ignition sequences before proceeding to lockout mode The control can be reset by briefly interrupting the power source Two Stage Running Circuit High fire operation is actuated by the thermostat switch or controller sending a 24VAC signal to the high fire relay Note Low fire must a...

Страница 36: ...d or repaired Transformer is faulty and must be replaced Is there 24V on the secondary side of the transformer Yes Yes No No Yes Is the inlet or the outlet of the unit plugged or obstructed Remove obstruction Yes No Continued on page 38 Does the unit spark Is there 24V at the blue and yellow secondary side of the internal transformer and common on the pressure switch No No Yes No Is there 24V at t...

Страница 37: ...ost purge relay is faulty and must be replaced Is there 24V across the W and GND terminals on the circuit board No Repair faulty wiring Check both high temperature spark wires and both electrodes If good replace circuit board Yes Check for loose wiring or restrictions in the hose connections to pressure switches Are they OK No Replace wiring or hose connections Replace the pressure switch after ve...

Страница 38: ...0 seconds after power to heater Is there 24V to valve for 15 seconds Yes The following can cause the heater to shut down Improper grounding High winds Dirty environment Fluctuating gas pressure Do the burners stay on No Does the heater stay on until the call for heat ends Yes Yes No No Yes No Diagnostic Indicator LED MODE 1 Flash Start up 2 Flashes Flame No call for heat 3 Flashes Ignition lockout...

Страница 39: ...e heater is in low fire mode and the troubleshooting steps described below should be followed Check to make sure gas pressure is within minimum and maximum inputs as indicated on the heater s rating plate Is gas pressure OK Is the inlet gas pressure within minimum and maximum inputs as indicated Yes Replace gas valve No Correct problem Is the heater properly grounded Is the heater s polarity corre...

Страница 40: ...nts Replacement Parts 3014 68B 6116 6115 6105 6121 6106 6107 6155 6170 6044A 1325 6121A 6175 15A 6103 6001 6130A 6130B 6119 6108 68B 6174 6013 6024 6048 828A 6196 6104 6051 6187 6126 826 6044B 6140 6141 6182 6190 TR EB 6084A 6188 6085A 6079 6021B 6182 Figure 5 2 Tube Reflector Components 6077A 6096 ...

Страница 41: ...l TP 6024 Gas Inlet Adapter TP 6121A Burner Chamber Side Panel TP 6140 2 Stage Natural Gas Valve TP 6126 Post Purge Relay TP 6141 2 Stage Propane Gas Valve TP 6130A Pressure Switch 80 000 BTU TP 6044A Manifold Pipe TP 6130B Pressure Switch 60 000 BTU TP 6044B Flue Extension TP 6155 Electrode TP 6048 1 2 Gas Inlet Street Elbow TP 6170 Burner TP 6051 Dual DSI Circuit Board TP 6174 Sight Glass TP 607...

Страница 42: ... for combustion is recommended Combustion air intake system when applicable Check for blockage and or leakage Check the outside termination and the connection at the heater Heat exchangers Check the integrity of the heat exchangers Replace if there are signs of structural failure Check for corrosion and or buildup within the tube exchanger passageways Check level both ways side to side front to ba...

Страница 43: ...mpany has made a diligent effort to provide product information and illustrate the products in this literature accurately however such information and illustrations are for the sole purpose of identification and do not express or imply a warranty that the products are merchantable fit for a particular purpose or that the products will necessarily conform to the illustrations or descriptions Except...

Страница 44: ...r death QTD2 Series Installation Manual The QTD2 Series Infrared Tube Heater is a negative pressure single stage radiant heater system This manual provides specific information related to the QTD2 Series model All persons involved with the installation operation and maintenance of the heater system must read and understand the information in this manual For Your Safety If you smell gas Open window...

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