Unit heater, standard power vent/separated-combustion blower type, standard power vent/separated-combustion fan type (48 pages)
Summary of Contents for Reznor UDAP
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FORM I-UDA (Version A) Obsoletes Form I-UDA � Installation/Operation Applies to: Model UDAP and Model UDAS Series Fan-Type � Unit Heaters ��� FOR YOUR SAFETY What to do if you smell gas: • Do not try to light any appliance.
10.3. Troubleshooting ........35 6. Mechanical ..........11-16 APPENDIX ............38 6.1 Gas Piping and Pressures ......11 6. Combustion Air - UDAP and UDAP-CV ..16 INDEX ............... 39 1. General 1.1 Hazard Labels and Notices There are warning labels on the unit and throughout this manual. For your safety, read the definitions below and comply with all boxes labeled CAUTION, WARNING, and DANGER during installation, operation, maintenance, and service of this heater.
1..1 Certification 1. General Model UDAP 30, 45, 60, 75, 100, and 125 and Model UDAS 30, 45, 60, 75, 100, and Installation 125 are design certified by the Canadian Standards Association for use in residential, Information industrial, and commercial installations.
2.2; the weights in Paragraph 5.1; and the venting requirements in the Venting Manual to determine where to suspend the heater. .1 Heater Throw ���������������������������������������������������� ������������������ FIGURE 1 - Throw for Fan Models UDAP and � UDAS � � ���...
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°...
Complete instructions are in this form or in the option package; option packages are shipped separately. Other shipped separate items could include a vent cap (Option CC1 for UDAP); a vent/ combustion air kit (Option CC2 or CC6 for UDAS); a manual gas valve; a thermostat bracket kit;...
Negative Pressure OFF Setpoint "w.c. Label color Purple Pink Purple Brown above 6000 ft Model UDAP-CV with Option AV6 for Common Venting (1830M) elevation Size 60 75 High Altitude Switch P/N 197029 197032 196362 196388 Negative Pressure OFF Setpoint "w.c.
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, 00 5...
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/” Retainers (either two or �����������������...
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6. 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...
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FIGURE 9 - Gas ������������������ connection is at ������������ �������������� the pipe nipple that ����������� �������� extends outside the ���� cabinet. ��������������� ��� ������������������������ Illustration shows ��������������������� both a vertical and �������������������� �������������� horizontal gas supply; requirements are the ������������ same. ����������� ��������...
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6. Mechanical ) Open the manual valve and operate the heater. (NOTE: On Model UDAS, depress and hold the door safety switch.) Measure the outlet pressure of the gas valve. To (cont’d) measure low-stage pressure on a unit equipped with a two-stage valve, disconnect 6.1 Gas Piping the wire from the “HI”...
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 Normal Thermal Output...
6. Mechanical 6. 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.
(20A @ 115V; 10A @ 230V Rating). Model UDAS supply wiring connects to leads located inside a sealed electrical box. To maintain the sealing feature of the electrical box, always replace the cover plate. Model UDAP sup- ply wiring connects directly to leads on the integrated circuit board.
The combustion air proving switch is a pressure sensitive switch that monitors air pres- Operating sure to ensure that proper combustion airflow is available. On Model UDAP, the switch Components is a single pole/normally open device which closes when a negative pressure is sensed in the venter housing.
7. Electrical 7.5. Flame Rollout Switch - Sizes 30-15 only Sizes 30-125 are equipped with a temperature activated manually reset flame rollout Supply and switch. The flame rollout switch is located at the top of the burner assembly. It is factory Wiring (cont’d) set and is non-adjustable.
Multiple Heater Control, Option CL31 and Option CL3 If the heater was ordered 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- former in the “controlling”...
LED venter motor energized indefinitely as long as the call for heat remains and the pres- lights on Model UDAP. sure switch is open. When the pressure switch is proven closed, the control begins the prepurge time. If flame is present any time while in prepurge, the prepurge time is restarted.
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4) Fan/Blower On Delay - The control waits for 30 seconds from the time the gas valve opened and then energizes the fan/blower motor. The gas valve and venter motor remain energized. The control proceeds to steady heat mode. 5) Steady Heat - Control inputs are continuously monitored to ensure limit and pres- sure switches are closed, flame is established, and the thermostat call for heat remains.
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8. Controls and Abnormal Heat Cycle Functions (cont’d) Operation Pressure switch opening for less than 2 seconds during the trial for ignition period shall not interrupt the heat cycle. (Gas valve will de-energize while the pressure switch is (cont’d) open.) If the pressure switch opens after a successful ignition, the control will de-energize the 8.3 Ignition System gas valve.
9. 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.
3) Open the access door. 4) Turn the gas control knob clockwise to “OFF”. Do not force. 5) Close the access door. 9.3 Check Vent System Testing Procedure - Model UDAP installation after 1. Seal any unused openings in the venting system. startup: 2.
(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. NOTE: If replacement • Clean all dirt, lint, and grease from the fan blade, fan guard, and parts are required, use motor.
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Carefully pull the burner assembly out of the cabinet. FIGURE 19 - Burner �������������������������������������������������������������������� ������������������������������������������������������������ Removal (UDAP �������������������� illustrated; same process for both UDAP and UDAS) ������ ������� ������������ ��������� ������������������� ���������������� �������������������� �����������...
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10. Maintenance 10.. Burner Maintenance (cont’d) and Service Re-Install the Burner (cont’d) (cont’d) burner shield; sliding the supports into the slots. On the right, re-attach each burner body support to the secondary air shield. 10. Maintenance 2. Attach the Secondary Air Baffles (Sizes 60-400 only) - Re-attach the secondary Procedures air baffles as marked.
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Shaft Blade 30-250 300-400 Motor Motor Setscrew Setscrew UDAP-45LN 5, 50, UDAP & UDAS Size 175 00 350 400 (with ALB) 9/16 1-1/2 2-1/8 2-3/8 2-5/16 2-3/8 2-1/8 1-5/8 1-7/8 1-3/8 inches Setscrew torque in/lbs ±10 1. If the heater is installed, turn off the gas and disconnect the electric power.
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10. Maintenance 3. Disconnect the three venter motor wires at the DSI control, capacitor wires at the and Service capacitor (if applicable), and ground screw (located on the control panel). 4. Sizes 30 and 45 - Disconnect the gas train and move it out of the way. Disconnect (cont’d) the gas supply at the union outside of the cabinet.
LED is visible through viewport on Model UDAS. Remove (Circuit Board) access panel on Model UDAP. See operating sequence in Paragraph 9. Do not attempt to repair the DSI integrated control module (circuit board); the only field replaceable component is the fuse.
10.3 Troubleshooting (cont’d) Control Status - Green LED Codes IMPORTANT: When using Steady ON Normal Operation, No call for heat a multimeter to troubleshoot Fast Flash . Normal Operation, Call for heat the 24 volt circuit, place the 1 Flash ..System Lockout, Failed to detect or sustain flame meter’s test leads into the 5 2 Flashes ..
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PROBLEM (cont'd) PROBABLE CAUSE (cont'd) REMEDY (cont'd) Burner will not light 4. No Spark (cont'd): 4. (cont'd) (cont'd) c) Incorrect spark gap. c) Maintain spark gap at 1/8". d) Spark cable shorted to ground. d) Replace worn or grounded spark cable. e) Spark electrode shorted to ground.
Smaller and/or larger vent and combustion air pipe diameters may be permissible. For Model UDAS refer to the Venting Installation Manual for Separated Combustion Units. For Model UDAP refer to the Venting Installation Manual for Power Vented units. For a Model UDAP with Option AV6, refer to the Venting Installation Manual for Common Venting.
Option CC2 or CC6 3, 6 Wiring Connections 17 Fan/Blower Off Delay 25 Option CD 2, 3, or 4 7 Wiring Diagram for Model UDAP or Fan/Blower On Delay 25 Option CK8, CK10, and CK22 11 Model UDAS, Single Stage 18...
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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 800-695-1901. Reznor/Thomas & Betts 150 McKinley Avenue Mercer, PA 16137 www.RezSpec.com...
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