Table of Contents
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WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly could result in serious injury, death, or
property damage.
Be sure to read and understand the installation, operation, and service instructions in
this manual.
Improper installation, adjustment, alteration, service, or maintenance can cause
serious injury, death, or property damage.
— Do not store or use gasoline or other flammable vapors and liquids in the vicinity
of this or any other appliance.
— 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.
•
Leave the building immediately.
•
Immediately call your gas supplier from a phone remote from the building. Follow
the gas supplier's instructions.
•
If you cannot reach your gas supplier, call the fire department.
— Installation and service must be performed by a qualified installer, service agency,
or the gas supplier.
Installation / Operation
CQS
Form I-UDA (10-14)
Obsoletes I-UDA (Version B.8)
Applies to: Model UDAP
and Model UDAS
Series Fan-Type
®
Unit Heaters
Form I-UDA, P/N 195673 R24, Page 1
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Table of Contents
Related Manuals for Reznor V3 Series
Summary of Contents for Reznor V3 Series
- Page 1 Form I-UDA (10-14) Obsoletes I-UDA (Version B.8) ® Installation / Operation Applies to: Model UDAP and Model UDAS Series Fan-Type ® Unit Heaters WARNING: FIRE OR EXPLOSION HAZARD Failure to follow safety warnings exactly could result in serious injury, death, or property damage.
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Page 2: Table Of Contents
Table of Contents 1. General ............2-4 7. Electrical Supply and Wiring ....16-22 1.1 Hazard Labels and Notices ......2 7.1 General ............16 1.2 General Installation Information ....3 7.2 Supply Wiring ..........17 1.3 Warranty ............4 7.3 24V Control Wiring Connections .... -
Page 3: General Installation Information
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. CAUTION Models UDAP & UDAS unit heaters should not be installed in an environment where the ambient temperature is below 50°F . -
Page 4: Warranty
1.0 General 1.3 Warranty (cont’d) Refer to the limited warranty information on the Warranty Card in the “Literature Bag”. Warranty is void if ... a. Wiring is not in accordance with the diagram furnished with the heater. b. The unit is installed without proper clearance to combustible materials. c. -
Page 5: Location Recommendations
Dimensions X, Y, and Z (feet) Model UDAP and Model UDAS with Standard Horizontal Louvers at Mounting Heights of 5 - 18 ft 5 ft -21° -20° -16° -14° -18° -14° 8 ft -39° -34° 10 18 -29° -25° -28° -24°... -
Page 6: Uncrating And Preparation
This unit was test operated and inspected at the factory prior to crating and was in operating condition. If the heater has incurred any damage in shipment, document the damage with the transporting agency and contact an authorized Reznor Distributor. -
Page 7: Clearances And Dimensions
In addition, if the heater is being installed at an altitude above 6000 ft (1830M), the pressure switch will have to be changed. If ordered with the unit as Option DJ20 or DJ21, the pressure switch is shipped separately for field installation. Gas valve adjustment Adjusting the valve outlet pressure is done after the heater is in operation;... -
Page 8: Dimensions
4.0 Clearances and Dimensions (cont’d) 4.2 Dimensions FIGURE 4 - Model UDAP, Power Vented Fan Model M and N - Hanger Dimensions for both 2-pt and 4-pt Suspension R - Hanger Dimension for 2-pt Suspension P and Q - Combustion Hanger Air Inlet Dimensions... - Page 9 FIGURE 5 - Model UDAS, Separated Combustion Fan Model M and N - Hanger Dimensions for both 2-pt and 4-pt Suspension R - Hanger Combustion Air Connection Dimension for (For size, see Technical Data in the 2-pt Suspension APPENDIX on page 38.) P and Q - Hanger Dimensions...
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Page 10: Hanging The Heater
5.0 Hanging the 5.1 Weights Heater Before suspending the heater, check the supporting structure to be used to verify that it has sufficient load-carrying capacity to support the weight of the unit. Model UDAP Size 30 45 60 75 150 175, 200 225 54 59 67 72 24 27 30 33 Model UDAS... -
Page 11: Mechanical
FIGURE 7A - Be sure the threaded hanger rods are Suspending the locked to the heater as illustrated. Heater with Rods from Length of threaded rod extending into the Threaded Nut the heater MUST NOT exceed 1/2” Retainers (either two or 3/8”... - Page 12 6.0 Mechanical 6.1 Gas Piping and Pressures (cont’d) (cont’d) 6.1.1 Gas Supply and Connections (cont’d) Sizing Capacity of Piping Cubic Feet per Hour based on 0.3" w.c. Pressure Drop Supply Specific Gravity for Natural Gas -- 0.6 (Natural Gas -- 1000 BTU/Cubic Ft) Line Specific Gravity for Propane Gas -- 1.6 (Propane Gas -- 2550 BTU/Cubic Ft) Length...
- Page 13 FIGURE 9 - Gas Ground Joint Union connection is at To Gas Valve Manual shutoff (inside the the pipe nipple that cabinet) extends outside the Drip From Gas Supply (horizontal or vertical) cabinet. Pipe nipple extending outside the cabinet. Manual shutoff Illustration shows both a vertical and To Gas Valve...
- Page 14 6.0 Mechanical is recommended rather than a spring type gauge due to the difficulty of maintaining calibration of a spring type gauge. (cont’d) 2) Open the manual valve and operate the heater. (NOTE: On Model UDAS, depress 6.1 Gas Piping and hold the door safety switch.) Measure the outlet pressure of the gas valve.
- Page 15 5. With the heater operating determine that the inlet pressure to the heater for natural gas is between 5 and 13.5 inches w.c. and for propane between 10 and 13.5 inches w.c. Take this reading as close as possible to the heater (Heaters are equipped with gas valves that have an inlet pressure tap.) If the inlet pressure is not within the specified range, the inlet pressure must be corrected and Steps 3 and 4 repeated.
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Page 16: Combustion Air - Models Udap And Udap-Cv
6.0 Mechanical 6.2 Combustion Air - Models UDAP and UDAP-CV (cont’d) 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 to replace that exhausted through the heater vent system. -
Page 17: Supply Wiring
7.2 Supply Wiring Check the rating plate on the heater for the supply voltage and current requirements. A dedicated line voltage supply with disconnect switch should be run directly from the main electrical panel to the heater. All external wiring must be within approved conduit and have a minimum temperature rise rating of 60°C Conduit must be run so as not to interfere with the heater access panel. -
Page 18: Wiring Diagrams
7.0 Electrical 7.4 Wiring Diagrams Supply and FIGURE 14A - Typical Wiring Diagram for Model UDAP or Model UDAS, Wiring (cont’d) Single Stage LINE/1/60 SYSTEM TRANSFORMER FACTORY WIRING FIELD WIRING OPTIONAL FACTORY WIRING WIRE CONNECTOR SCREW NEUTRAL NEUTRAL P3-1 NEUTRAL P3-2 FAN MOTOR EAC/BLO... - Page 19 FIGURE 14B - Typical Wiring Diagram for Model UDAP or Model UDAS, Two Stage Gas Valve or Recirculation Form I-UDA, P/N 195673 R24, Page 19...
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Page 20: Electrical Operating Components
7.0 Electrical 7.5.1 Combustion Air Proving (Pressure) Switch The combustion air proving switch is a pressure sensitive switch that monitors air pres- Supply and sure to ensure that proper combustion airflow is available. On Model UDAP, the switch Wiring (cont’d) is a single pole/normally open device which closes when a negative pressure is sensed in the venter housing. -
Page 21: Controls And Operation
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 fac- tory set and is non-adjustable. If the setpoint is reached, the flame rollout acts to inter- rupt the electric supply to the gas valve. -
Page 22: Thermostat
8.0 Controls and Multiple Heater Control, Option CL31 and Option CL32 If the heater was ordered Operation with a multiple heater control option, one thermostat can be used to control up to six heaters. The option includes a 40VA transformer that replaces the standard trans- (cont’d) former in the “controlling”... -
Page 23: Ignition System
8.3 Ignition System This heater is equipped with a direct spark integrated control module (circuit board). The module monitors the safety devices and controls the operation of the fan and ven- ter motors and the gas valve between heat cycles. FIGURE 16 –... - Page 24 8.0 Controls and Normal Heat Cycle Operating Sequence (cont’d) Operation 6) Post Purge - The venter motor output remains on for a 45-second post-purge period after the thermostat is satisfied. (cont’d) 7) Fan/Blower Off Delay - The fan/blower motor is de-energized after a fan/blower off 8.3 Ignition System delay (120 seconds).
- Page 25 If a call for heat (W) occurs during continuous fan, the fan/blower will de-energize. A call for fan is ignored while in lockout. Continuous Fan 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 on heat Operation speed.
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Page 26: Commissioning And Startup
9.0 Commissioning 9.1 Check the installation prior to startup: and Startup Check to be sure that all screws used to hold shipping brackets were re- installed in the heater cabinet. Check suspension. Unit must be secure and level. Check clearances from combustibles. - Page 27 Operating Sequence 1. Set thermostat at lowest setting. FIGURE 17 - Gas Valve 2. Turn off all electric power to the appliance. 3. This appliance is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand. Open the access door and locate the Top View gas control (ON/OFF) knob or switch on the gas valve.
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Page 28: Check Installation After Startup
9.0 Commissioning With the unit in operation, measure valve outlet gas pressure. If operated at high altitude, adjust outlet gas pressure for altitude. and Startup See information and instructions in Paragraph 6.1. (cont’d) Turn the unit off and on, pausing two minutes between each cycle. Observe for 9.3 Check smooth ignition. -
Page 29: Maintenance Schedule
10.1 Maintenance Maintenance Schedule - The following procedures should be carried out at least annually (See FIGURE 18 and Paragraphs 10.2.1 - 10.2.14.): Schedule • Clean all dirt, lint, and grease from the combustion air opening (UDAP) and venter assembly. •... -
Page 30: Maintenance Procedures
10.2 Maintenance This heater has a CORE heat exchanger. ® Procedures Remove any external dirt or dust accumulation. Visually check the heat exchanger for cracks and holes. If a crack or hole is observed, replace the heat exchanger. 10.2.1 Heat NOTE: Inspection of the lower portion of the heat exchanger is done with the burner Exchanger removed. - Page 31 With the burner assembly removed, shine a flashlight on the burner ribbons. Look for Inspect and Clean the carbon buildup, scale, dust, lint, and/or anything that might restrict flow through the Burner spaces between the burner ribbons. Holding the burner assembly so that any foreign material will fall away from the burner, use a stiff bristle brush to loosen and remove any foreign material(s).
- Page 32 10.0 Maintenance 10.2.4 Ignition System (cont’d) and Service Do not attempt to disassemble the control module. However, each heating season check the lead wires for insulation deterioration and good connections. (cont’d) Proper operation of the direct spark ignition system requires a minimum flame signal 10.2 Maintenance of 1.0 microamps as measured by a microampmeter.
- Page 33 5. Reconnect the fan motor wires according to the wiring diagram and close the access panel. 6. Restore power to the heater and turn on the gas. Light, following the instructions on the lighting instruction plate. Check for proper operation. 10.2.6 Venter Motor Replacement Instructions and Wheel...
- Page 34 10.0 Maintenance 10.2.7 Operating Gas Valve (cont’d) and Service Single-Stage Valves (cont’d) 1/8” Outlet Two -Stage Valve Pressure Tap 1/8” Outlet 10.2 Maintenance Pressure Tap Procedures (cont’d) FIGURE 24 - Pressure Tap for Checking Gas Flow Shutoff 1/8” Outlet Pressure Tap 2) With the manual valve turned off to prevent flow to the gas valve, connect a NOTE: Operational manometer to the 1/8”...
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Page 35: Troubleshooting
See FIGURE 18, page 30, for location. Use a voltmeter to verify that 10.2.12 Transformer there are 24 volts output from the transformer. If the transformer is not functioning, it must be replaced. Use a replacement transformer identi- cal to the factory-installed model. 10.2.13 Disconnect If it is determined that the disconnect switch needs replacing, use only the factory-authorized replacement part that is designed for the heater. - Page 36 10.3 Troubleshooting (cont’d) General Troubleshooting PROBLEM PROBABLE CAUSE REMEDY Venter motor will not 1. No power to unit. 1. Turn on power, check supply fuses or circuit breaker. start 2. No 24 volt power to integrated circuit board. 2. Turn up thermostat; check control transformer output. 3.
- Page 37 No heat (Heater Op- 1. Incorrect valve outlet pressure or orifice. 1. Check valve outlet pressure. See Rating plate for manifold pressure. erating) 2. Cycling on limit control. 2. Check air throughput. 3. Improper thermostat location or adjustment. 3. See thermostat manufacturer's instructions. Fan or venter motor 1.
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Page 38: Appendix
APPENDIX 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 49,800 62,250... -
Page 39: Index
INDEX Preparing for Installation 6 Gas Supply Line 12 Prepurge 23 Gas Valve 21, 33 Abnormal Heat Cycle Functions 24 Pressure Switch 24 Gas Valve ON/OFF Control Knob 27 Aircraft Hangars 4 Pressure Switch Settings 20 Control Amps 38 PRESSURE TESTING SUPPLY PIP- Full Load Amps 38 Hanger Kits 11 ING 11... -
Page 40: Installation Record
________________________________________________________________________________________ BUILDING OWNER OR MAINTENANCE PERSONNEL: For service or repair • Contact the installer listed above. • If you need additional assistance, contact the Reznor Distributor listed above. ® • For more information, contact your Reznor Representative by calling 1-800-695-1901.
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