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CQS
Table of Contents
Warnings ........................................ 1
Installation/Operation .............. 2-25
Check/Test/Startup ................. 26-28
Maintenance/Service .............. 28-36
Index (by page)
Burner .................................................. 16, 29
Burner Orifice ............................................ 30
Burner Removal .......................................... 29
California Warning Label .............................. 3
Clearances ................................................... 7
Installation Codes ........................................ 2
Confined Space (UDAP) .............................. 8
Dimensions ............................................... 4-5
Disconnect, Built-in (UDAS) ................ 16, 34
Door Switch (UDAS) ........................... 19, 33
Downturn Nozzle (Option) ........................... 4
Electrical Connections ............................... 16
Fan ............................................................. 32
Fan Motor ............................................. 22, 32
Flame Rollout Switch .......................... 19, 34
Gas Piping and Pressures ........................... 12
Gas Valve .............................................. 22, 33
General ........................................................ 2
Hanging the Heater ..................................... 10
Hazard Intensity Levels ............................... 2
Heat Exchanger Maintenance ..................... 29
High Altitude .......................................... 7, 14
Ignition System ..................................... 19, 31
Limit Control ........................................ 18, 33
Location (Heater) .......................................... 9
Maintenance Schedule ............................... 28
Pressure Switch (Combustion Air) ....... 18, 33
Replacement Parts ................ See Form P-UD
Sound Data .................................................. 6
Startup ........................................................ 26
Suspending Heater ....................................... 4
Technical Data .............................................. 6
Thermostat (Option) .................................. 17
Throw (Heater) ............................................. 9
Transformer ................................................ 33
Troubleshooting ................................... 34-36
Uncrating and Preparation ........................... 3
Valve Outlet Pressure .................................. 14
Vent System ............................................... 34
Venter Motor .............................................. 32
Venting UDAP .......... Use Form I-UD-V-PV
Venting UDAP-CV .......... Use Form I-V-CV
Venting UDAS ........... Use Form I-UD-V-SC
Warranty ....................................................... 3
Wiring Diagrams .................................. 23-25
Page
What to do if you smell gas:
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone
in your building.
• Immediately call your gas supplier from a neighbor's
phone. Follow the gas supplier's instructions.
• If you cannot reach your gas supplier, call your fire
department.
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
WARNING: Improper installation, adjustment, alteration,
service, or maintenance can cause property damage, injury,
or death. Read the installation, operation, and maintenance
instructions thoroughly before installing or servicing this
equipment.
WARNING: Gas-fired appliances are not designed for use in
hazardous atmospheres containing flammable vapors or
combustible dust, in atmospheres containing chlorinated or
halogenated hydrocarbons, or in applications with airborne
silicone substances. See Hazard Levels, page 2.
WARNING: Should overheating occur, or the gas supply fail to
shut off, shut off the manual gas valve to the appliance before
shutting off the electrical supply.
WARNING: Do not use this appliance if any part has been under
water. Immediately call a qualified service technician to inspect
the appliance and replace any gas control that has been under
water.
Series Fan-Type
Installation/Operation FORM RZ-NA I-UDA
APPLIES TO:
FOR YOUR SAFETY
FOR YOUR SAFETY
Form RZ-NA I-UDA, Mfg #195673 Rev 9, Page 1
Unit Heaters
Models UDAP and UDAS
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Summary of Contents for Thomas & Betts REZNOR V3 Series
- Page 1 Series Fan-Type Unit Heaters Installation/Operation FORM RZ-NA I-UDA APPLIES TO: Models UDAP and UDAS Table of Contents FOR YOUR SAFETY Page Warnings ........1 What to do if you smell gas: Installation/Operation ....2-25 • Do not try to light any appliance. Check/Test/Startup ....
- Page 2 Hazard Levels of HAZARD INTENSITY LEVELS Warnings in this 1. DANGER: Failure to comply will result in severe personal injury or death and/or property damage. Manual 2. WARNING: Failure to comply could result in severe personal injury or death and/or property damage. 3.
- Page 3 diction should be consulted before installation is made to verify local codes and installation procedure requirements. Installations in aircraft hangars should be in accordance with ANSI/NFPA No. 409 Special Installations (latest edition), Standard for Aircraft Hangars; in public garages in accordance (Aircraft Hangars/ with ANSI/NFPA No.
- Page 4 5. Dimensions FIGURE 1 - Model UDAP, Power Vented Fan Model MODEL UDAP DIMENSIONS (inches ± 1/16) S ize 30, 45 12-1/8 26-5/8 13-13/16 21-9/16 5-3/16 6-1/2 2-11/16 3-7/8 17-3/8 11/16 4-5/16 9-9/16 15-1/8 26-5/8 13-13/16 21-9/16 7-7/8 6-1/2 5-1/2 3-7/8 17-3/8 11/16 4-5/16...
- Page 5 FIGURE 3 - Model UDAS, Separated Combustion Fan Model MODEL UDAS DIMENSIONS (inches ± 1/16) S ize 30, 45 12-1/8 26-5/8 10 13-13/16 21-9/16 5-3/16 6-1/2 2-11/16 3-7/8 17-3/8 11/16 4-5/16 9-9/16 2-15/16 2-15/16 15-1/8 26-5/8 13 13-13/16 21-9/16 7-7/8 6-1/2 5-1/2 3-7/8...
- Page 6 6. Technical Data TECHNICAL DATA - Sizes 30 - 125 (Data applies to both Models UDAP and UDAS unless noted otherwise.) Size BTUH 30,000 45,000 60,000 75,000 105,000 120,000 Input Heating Capacity 13.2 17.6 22.0 30.8 35.2 Thermal Efficiency (%) BTUH 24,600 37,350...
- Page 7 7. High Altitude If the heater is being installed at an elevation above 2000 ft (610M), the input rate will have to be derated. This is done by adjusting the valve outlet pressure. Operation In addition, if the heater is being installed at an altitude above 6000 ft (1830M), the pressure switch will have to be changed.
- Page 8 9. Combustion This heater must be supplied with the air that enters into the combustion process and is then vented to the outdoors. Sufficient air must enter the equipment location Air - applies to to replace that exhausted through the heater vent system. In the past, the infiltra- tion of outside air assumed in heat loss calculations (one air change per hour) was Model UDAP assumed to be sufficient.
- Page 9 Use the sound data in Paragraph 6, clearances in Paragraph 8; the combustion air 10. Unit Heater requirements in Paragraph 9; the throw tables, mounting height requirements, and Location location recommendations below; the weights in Paragraph 11; and the venting requirements in the Venting Manual to determine where to suspend the heater.
- Page 10 10. Unit Heater For best results, the heater should be placed with certain rules in mind. In general, a unit should be located from 8 to 12 feet (2.4-3.7M) above the floor. Units should Location always be arranged to blow toward or along exposed wall surfaces, if possible. Where two or more units are installed in the same room, a general scheme of air (cont’d) circulation should be maintained for best results.
- Page 11 FIGURE 7A - Suspending Be sure the threaded hanger rods are the Heater with Rods from locked to the heater as illustrated. the Threaded Nut Retainers Length of threaded rod extending into (either two or four point the heater MUST NOT exceed 1/2” 3/8”...
- Page 12 12. Gas Piping WARNING: This appliance is equipped for a maximum gas supply pressure of 1/2 psi, 3.5 kPa, or 14 inches water column. Supply pressure greater than 1/2 psi requires installation of an additional Pressures lockup-type service regulator external to the unit. WARNING: PRESSURE TESTING SUPPLY PIPING Test Pressures Above 1/2 PSI: Disconnect the heater and manual valve from the gas supply line which is to be tested.
- Page 13 Leak-test all connections by brushing on a leak-detecting solution. FIGURE 10 - Gas Ground Joint Union Manual shutoff connection is at the pipe To Gas Valve nipple that extends outside (inside the cabinet) the cabinet Drip From Gas Supply (horizontal or vertical) Illustration shows both a vertical and horizontal gas Pipe nipple extending...
- Page 14 Instructions for High Altitude Derate 12. Gas Piping 1. Determine the required valve outlet pressure for the elevation where the heater will be operating. If unsure of the elevation, contact the local gas supplier. Valve Outlet Pressure Settings by Elevation Pressures Manifold Pressure Settings by Altitude for the UNITED STATES (cont’d)
- Page 15 High Altitude The input and/or the capacity of the heater changes with the derate. The tables below list inputs and capacities at altitudes from sea level to 10,000 ft (3045M). Capacity Changes BTUH Inputs and Capacities by Altitude in the UNITED STATES for Model UDAP and Model UDAS Thermal Thermal Thermal...
- Page 16 13. Burner CORE ® This heater has a one-piece burner assembly (U.S. Patent No. 6,889,686) designed to provide controlled flame stability without lifting or flashback with either natural or propane gas. The burner can be removed as a unit for inspection or service; see Maintenance Section for removal instructions.
- Page 17 15. Thermostat Use either an optional thermostat available with the heater or a field-supplied 24- volt thermostat. Install according to the thermostat manufacturer's instructions, pay- ing particular attention to the requirements regarding the location of the thermostat. Connections Make sure that the heat anticipator setting on the thermostat is 0.6 amps (or in accordance with the amperage value noted on the wiring diagram of your heater).
- Page 18 The combustion air proving switch is a pressure sensitive switch that monitors air 16. Combustion pressure to ensure that proper combustion airflow is available. On Model UDAP, Air Proving the switch is a single pole/normally open device which closes when a negative pressure is sensed in the venter housing.
- Page 19 18. Flame Sizes 30-125 are equipped with a temperature activated manually reset flame rollout switch. The flame rollout switch is located at the top of the burner assembly. It is Rollout factory set and is non-adjustable. If the setpoint is reached, the flame rollout acts to interrupt the electric supply to the gas valve.
- Page 20 20. Ignition 1) Call for Heat - The thermostat calls for heat by energizing the “W” terminal. The control checks to see that the limit switch is closed and the pressure switch is System open. If the limit switch is open, the control responds as defined in the “Abnormal Heat Cycle, Limit Switch Operation”.
- Page 21 Ignition Retry - If flame is not established on the first trial for ignition period, the control de-energizes the gas valve and the venter motor remains energized for an inter-purge period of 10 seconds. The spark and gas valve are then re-energized, and the control initiates another trial for ignition.
- Page 22 20. Ignition Undesired Flame - If flame is sensed longer than 20 seconds while the gas valve is de-energized, the control shall energize the venter motor and fan/blower motor System on heat speed. When flame is no longer sensed, the venter motor will run through postpurge, and the fan/blower motor will run through the selected heat fan off (cont’d) delay time.
- Page 23 23. Wiring Diagrams FIGURE 15A - Typical Wiring Diagram for Model UDAP or Model UDAS, Single Stage Form RZ-NA I-UDA, Mfg #195673 Rev 9, Page 23...
- Page 24 23. Wiring Diagrams (cont’d) FIGURE 15B - Typical Wiring Diagram for Model UDAP or Model UDAS, Single Stage with Optional Air Recirculation Form RZ-NA I-UDA, P/N 195673 Rev 9, Page 24...
- Page 25 FIGURE 15C - Typical Wiring Diagram for Model UDAP or Model UDAS, Two Stage Gas Valve Form RZ-NA I-UDA, Mfg #195673 Rev 9, Page 25...
- Page 26 24. Check Check to be sure that all screws used to hold shipping brackets were re- installed in the heater cabinet. Installation Check suspension. Unit must be secure and level. and Startup Check clearances from combustibles. Requirements are in Paragraph 8. Check vent system to be sure that it is installed according to the instructions in the appropriate Vent Installation Manual as listed in Paragraph 1.
- Page 27 4. Turn the gas control knob clockwise to "OFF". FIGURE 16 - Gas Valve ON/OFF Control Knob 5. Wait five (5) minutes to clear out any gas. Then smell for gas, including near the floor. If you smell gas, STOP! and follow the steps in the WARNINGS printed above or on the Operating Label on the heater.
- Page 28 24. Startup Turn the unit off and on, pausing two minutes between each cycle. Observe for smooth ignition. (cont’d) Place the "Owner's Envelope" containing the Limited Warranty, this booklet, the venting manual, and any control or optional information in an accessible location near the heater.
- Page 29 26. Heat CORE ® This heater is equipped with a heat exchanger (U.S. Patent No. 6,889,686). Exchanger Remove any external dirt or dust accumulation. Visually check the heat exchanger Maintenance for cracks and holes. If a crack or hole is observed, replace the heat exchanger. NOTE: Inspection of the lower portion of the heat exchanger is done with the burner removed.
- Page 30 27. Burner size. Each baffle is held in place by one screw. For re-assembly, on the secondary air shield, mark the location (top and bottom) of each baffle. Maintenance Remove all baffles. 8. Remove Burner Assembly (cont’d) a) Locate the burner body supports. Depending on the size, the burner will have two or more supports.
- Page 31 FIGURE 18 - Location of Controls Venter Motor (Size 30-75 Flame Sensor illustrated. Venter motor Flame Rollout Switch High Temperature is in the same location for (Sizes 30-125) Limit Control Pressure Switch all models, but appear- ance is different.) Model UDAS has a collar for combustion air pipe (not illustrated) Interlock Door...
- Page 32 Ignitor - Refer to FIGURE 18 and locate the ignitor. Disconnect the wire; re- 29. Ignition move the screw and the ignitor. Clean the ignitor assembly with an emery cloth. System Spark gap must be maintained to 1/8". See FIGURE 20. (cont’d) FIGURE 20 - Ignitor showing required...
- Page 33 5. Holding the venter motor, remove the three or four screws that attach the venter motor mounting plate to the venter housing. Remove the motor and wheel as- sembly from the heater. 6. Re-assemble with the replacement venter motor and wheel assembly. See FIG- URE 22.
- Page 34 37. Flame The cause of a flame rollout switch activating must be determined. Activation of the manually reset flame rollout switch could be caused by one or more of the Rollout following: Switch - • Restricted or plugged • Restricted combustion air inlet or exhaust heat exchanger outlet in combination with a defective Sizes 30-125...
- Page 35 Check the Lights on The integrated circuit board monitors the operation of the heater and includes two LED signal lights that indicate normal operation and various abnormal conditions. the DSI Integrated If the heater fails to operate properly, check this signal to determine the cause and/ Control Module or to eliminate certain causes.
- Page 36 40. Troubleshooting (cont’d) PROBLEM (cont'd) PROBABLE CAUSE (cont'd) REMEDY (cont'd) Burner will not light 9. Integrated circuit board does not power main valve. (cont'd) a) Loose wire connections. a) Check and tighten all wiring connections. b) Flame sensor grounded. b) Be certain flame sensor lead is not grounded or insulation or ceramic is not cracked.
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