Reznor UEAS Installation, Operation & Maintenance Manual
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Reznor UEAS Installation, Operation & Maintenance Manual

High-efficiency, separated-combustion, low-static unit heater
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See also: Install and Operation Instructions
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.
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.
This booklet includes installation, operation, maintenance, and service information. Before beginning
any procedure, carefully review all information, paying particular attention to the warnings. All installation
procedures must be in compliance with all codes and requirements of authorities having jurisdiction.
�
FOR YOUR SAFETY
FOR YOUR SAFETY
WARNING:
Keep this booklet for future reference.
Installation/Operation/Maintenance
Applies to: Model UEAS,
High-Efficiency, Separated-
Combustion, Low-Static
CQS
CQS
Form I-UEAS (Version A)
Obsoletes Form I-UEAS
Unit Heater
Form I-UEAS, P/N 221232 R6, Page 1

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  • Page 1 All installation procedures must be in compliance with all codes and requirements of authorities having jurisdiction. Keep this booklet for future reference. Form I-UEAS, P/N 221232 R6, Page 1...

  • Page 2: Table Of Contents

    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 above. Form I-UEAS, Page 2...

  • Page 3: General Information

    Check the rating plate to determine if the heater is appropriate for the intended installation. NOTE: All Model UEAS heaters are factory equipped for use with natural gas and include a conversion kit for field conversion for use with propane.

  • Page 4: Unit Heater Location

    (angle is rela- tive to the top of the heater). � Throw pattern changes with � the addition of optional verti- ��� cal louvers and/or downturn nozzles. ����������������������������������������������� ��������������������������������������������������� ������������������������������������� ���������������������������������������������������������������������� Form I-UEAS, Page 4...
  • Page 5 Dimensions X, Y, and Z (feet) Model UEAS with Standard Horizontal Louvers at Mounting Heights of 5 - 18 ft Louver Louver Louver Louver Angle* Angle* Angle* Angle* 8 ft -26° -20° -24° -20° 10 ft -32° -25° -29° -25°...

  • Page 6: Receiving, Uncrating, And Preparing For Installation

    Uncrating, and shipment, document the damage with the transporting agency and contact Preparing for an authorized Reznor Distributor. If you are an authorized Distributor, fol- Installation low the FOB freight policy procedures as published by Thomas & Betts for Reznor products.

  • Page 7: Dimensions

    ������� ������� ������������ ��� ������� � � � with Option CD2 with Option CD3 with Option CD4 "T" for UEAS Size inches inches inches 130, 180 11-1/2 19-7/8 14-1/2 260, 310 18-1/2 21-1/2 Form I-UEAS, P/N 221232 R6, Page 7...

  • Page 8: High Altitude Operation

    Before suspending the heater, check the supporting structure to be used to verify that it has sufficient load-carrying capacity to support the weight Heater of the unit. Model UEAS - Weight WARNING: Unit Size must be level for proper operation.

  • Page 9: Mechanical

    1270 1105 1050 100' 125' 150' 175' 200' Note: When sizing supply lines, consider possibilities of future expansion and increased requirements. Refer to National Fuel Gas Code for additional information on line sizing. Form I-UEAS, P/N 221232 R6, Page 9...
  • Page 10 At startup, measure the valve outlet pressure. Refer to the pressure chart on page 12 for correct outlet pressure. When using propane, the inlet supply pressure to the valve must be a mini- mum of 11” w.c. and a maximum of 14” w.c. Form I-UEAS, Page 10...
  • Page 11 “OFF”. Connect a manometer to the 1/8” pipe outlet pressure tap in the valve. Use a water column manom- eter that is readable to the nearest tenth of an inch. Form I-UEAS, P/N 221232 R6, Page 11...
  • Page 12 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 High Altitude Capacity ft (3045M). Changes BTUH Inputs and Capacities by Altitude in the UNITED STATES for Model UEAS Normal Thermal Output Normal Thermal Output...

  • Page 13: Venting And Combustion Air

    CC6 or Option CC2) are the only venting/combustion air systems approved for high efficiency Model UEAS separated-combustion unit heaters. Model UEAS units are certified as Category IV heaters. These heaters are very thermal efficient and will produce condensate during operation. The heater and its venting system must be connected to a drain.

  • Page 14: Air Requirements

    7. Mechanical 7.2.1.2 Venter Outlet and Combustion Air Inlet (cont’d) Disconnect Switch Rear View of Model UEAS 7.2 Venting and Combustion Air Line Voltage Entrance (cont’d) 7.2.1 Vent/Combustion Gas Connection Air Requirements (External) (cont’d) 6” dia Collar for Combustion Air Pipe...

  • Page 15: Condensate Drain

    Both the vent condensate drain and the heat exchanger condensate drain require a trap and must go into a sanitary drain. (See Paragraph 7.3, page 28, for requirements on installing the condensate drain.) All vent and drain parts in this illustration are field supplied. Form I-UEAS, P/N 221232 R6, Page 15...

  • Page 16: Combustion Air

    See instructions for Option CC2 or Option CC6. Diameter and Length of the Combustion Air Inlet Pipe Model UEAS 130, 180, 260, 310 Diameter Length 6"...
  • Page 17 Cradle Support Slope a horizontal run downward slightly Sweep-type toward the vent condensate drain at the heater. elbow only 3 to 6 inches (76 to 152mm) Maximum length 6 ft (1.8M) for single support Form I-UEAS, P/N 221232 R6, Page 17...
  • Page 18 Combustion Air (cont’d) 7.2.1.9 Concentric Adapter Box 7.2.1 Vent/Combustion All Model UEAS installations require a concentric adapter box as illustrated Air System in FIGURES 11, 12, 13, and 14. The concentric adapter box is included Requirements (cont’d) in both the horizontal and vertical vent/combustion air kits. Installation is included in the Option CC6 and Option CC2 instructions.
  • Page 19 HORIZONTAL OR VERTICAL VENT TERMINAL? FIGURE 15 - Is Vertical, the Separated- Option CC2, Combustion Vent/ instructions Combustion Air begin on System Horizontal page 24. or Vertical? Horizontal, Option CC6, instructions begin on page 20. Form I-UEAS, P/N 221232 R6, Page 19...
  • Page 20 WARNING: All vent terminals must be positioned or lo- cated away from fresh air intakes, doors and windows to preclude combustion products from entering occupied space. Failure to comply could result in severe personal injury or death and/or property damage. Form I-UEAS, Page 20...
  • Page 21 Attach the combus- tion air pipe to the collar with sheetmetal screws. Seal the joint and seam with sealant or tape. Form I-UEAS, P/N 221232 R6, Page 21...
  • Page 22 8b) Slide the elbow over the end of the vent pipe and attach it with the field- provided 3/4” long sheetmetal screw. Slide the bird screen into the socket on the open end of the elbow. The elbow must be pointing down. Form I-UEAS, Page 22...
  • Page 23 Installation of the horizontal vent and combustion air system on your sepa- rated-combustion unit is complete. Verify compliance with all venting instal- lation requirements, pages 13-19, and FIGURE 16. FIGURE 16 - Typical Installation of a Model UEAS High Efficiency, Separated-Combustion Unit with a Horizontal Vent/Combustion Air Terminal (Option CC6) ������������������...

  • Page 24: Installation Instructions

    Spacing when Installing Temperature Vertical Combustion Air/Vent Terminals (Option CC2) more than one Heater °F °C inches 31 or warmer 0 or warmer -10 to 30 -23 to -1 1524 less than -10 less than -23 2134 Form I-UEAS, Page 24...
  • Page 25 Position the pipe so that it extends beyond the combustion air pipe the height determined in 6a) above. Verify that the silicone ring is seated properly. Form I-UEAS, P/N 221232 R6, Page 25...
  • Page 26 4” vent pipe and seat it flush on the top of combustion air inlet. Do not use sealant. 8c) Attach the bird guard with the two sheetmetal screws provided (See Figure 19. . 8d) On the outside (See FIGURE 18), flash the combustion air pipe to the roof. Flashing is field-supplied. Form I-UEAS, Page 26...
  • Page 27 Installation of the vertical vent and combustion air system on your sepa- rated-combustion unit is complete. Verify compliance with all venting instal- lation requirements, pages 13-19, and FIGURE 20. FIGURE 20 - Typical Installation of a Model UEAS High Efficiency, Separated-Combustion Unit with a Vertical Vent/Combustion Air Terminal (Option CC2) ��������������������...

  • Page 28: Condensate Drain System

    6 and is not harmful to a sanitary drain. NOTE: Actual ph may vary ± 1 depending upon fuel and combustion air ) Model UEAS Sizes 130 and 180 will produce approximately one gallon (4 liters) of condensate per hour.
  • Page 29 Drain must be 1/2” or larger. The trap requirements are the same for either type of drain connection. NOTE: In Canada, all PVC vent pipe must be approved to ULC S636. Form I-UEAS, P/N 221232 R6, Page 29...

  • Page 30: Electrical And Wiring

    Gas Connection FIGURE 24 - Line Voltage Entrance Terminal Strip for 24-volt Rear View Wiring is on Model UEAS the Outside Rear of the Terminal Strip for Heater Thermostat Connection Condensate Drain R G W1 W2 Form I-UEAS, Page 30...

  • Page 31: Typical Wiring Diagram

    PURPLE - PR 6. USE #18 GA. WIRE FOR CONTROL WIRING ON THE UNIT. WD# 230300 REV. #1 AG1 WHITE - W 7. CAPACITOR IS REMOTE MOUNTED. 8. SET THERMOSTAT ANTICIPATOR AT 0.6 AMPS. Form I-UEAS, P/N 221232 R6, Page 31...

  • Page 32: Controls

    The main burner will remain off until the system has cooled and/or the flue system resistance is reduced. The Table below lists the approximate water column differential pressure readings and switch setpoints for sea level operating conditions for Model UEAS heaters. Form I-UEAS, Page 32...
  • Page 33 See Hazard Intensity Levels, page 9.3.4 Door Switch All Model UEAS heaters are equipped with a door switch which prevents the heater from operating when the service door panel is open. The ser- vice panel has a pliable gasket material that fully seals the door to pro- vide added protection from building air entering the combustion zone of the heater.

  • Page 34: Ignition System

    If flame has not been sensed during the first 16 sec- onds, the control de-energizes the spark output and keeps the gas valve energized for an additional one second flame proving period. If flame is not Form I-UEAS, Page 34...
  • Page 35 LED to indicate ignition failure lock- out. Limit Switch Operation - The limit switch is ignored unless a call for heat is present (W energized). If the limit switch is open and a call for heat is Form I-UEAS, P/N 221232 R6, Page 35...

  • Page 36: Operation

    If the gas valve was sensed as closed when it should be open, and has not de-energized after the venter motor was shutoff for 15 seconds, then the venter motor is re-energized to vent the unburned gas. Form I-UEAS, Page 36...

  • Page 37: Check The Installation Prior To Startup

    A service disconnect switch should be used. Verify that fusing or circuit breakers are adequate for the load use. □ Check polarity. Verify that line voltage exists between the black “L1” and earth ground. Form I-UEAS, P/N 221232 R6, Page 37...

  • Page 38: Heater Startup

    6. Turn the gas control knob counterclockwise to “ON”. ��� ��� ���� ���� 7. Close the access door. 8. Turn on the electric power to the heater. 9. Set the thermostat to the desired setting. Form I-UEAS, Page 38...

  • Page 39: Check Installation After Startup

    Combustion air at the burner should be regulated only by manufacturer- provided equipment. NEVER RESTRICT OR OTHERWISE ALTER THE SUPPLY OF COMBUSTION AIR TO ANY HEATER. MAINTAIN THE VENT/COMBUSTION AIR SYSTEM IN STRUCTURALLY SOUND AND PROPER OPERATING CONDITION. Form I-UEAS, P/N 221232 R6, Page 39...

  • Page 40: Maintenance And Service

    Burner Removal CAUTION: Use of eye protection is recommended. Instructions (Refer to FIGURE 27.) 1. Outside the cabinet, shut the gas supply off at the manual valve ahead of the union. Form I-UEAS, Page 40...
  • Page 41 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). If the Form I-UEAS, P/N 221232 R6, Page 41...
  • Page 42 Do not attempt to disassemble the control module. However, each heating season check the lead wires for insulation deterioration and good connec- tions. Proper operation of the direct spark ignition system requires a minimum flame signal of 1.0 microamps as measured by a microampmeter. Form I-UEAS, Page 42...
  • Page 43 IMPORTANT: When re-assembling, the brown ground wire must remain attached to the ignitor. CAUTION: Due to high voltage on the spark wire and elec- trode, do not touch when energized. See Hazard Levels, page 2. Form I-UEAS, P/N 221232 R6, Page 43...
  • Page 44 Remove dirt and grease from the motor casing, the venter housing, and the venter wheel. Venter motor bearings are permanently lubricated. Follow Wheel these instructions for replacement of the venter motor and wheel assembly. Keep all hardware removed to be used in re-assembling and installing the replacement parts. Form I-UEAS, Page 44...

  • Page 45: Combustion Air Pressure Switch

    If it is determined that the limit control needs replacing, use only a factory- authorized replacement part that is designed for the size of heater. Limit Control For approximate limit location, see FIGURE 28, page 43. Form I-UEAS, P/N 221232 R6, Page 45...
  • Page 46 Check to be certain the piping to the sanitary drain has not been damaged. Check the sanitary drain to verify that it flows freely. Form I-UEAS, Page 46...

  • Page 47: Troubleshooting

    Steady OFF..Blown fuse, No Power, or Defective Board Flame Status - Yellow LED Codes Steady ON..Flame is sensed Slow Flash..Weak flame (current below 1.0 microamps ± 50%) Fast Flash..Undesired Flame (valve open and no call for heat) Form I-UEAS, P/N 221232 R6, Page 47...

  • Page 48: General Troubleshooting

    Supply pressure should be 5" - 14" w.c. for natural gas or 11" - 14" w.c. for propane gas. d) Cracked ceramic at sensor. d) Replace sensor. 11. Faulty time delay relay. 11. Replace time delay relay. Form I-UEAS, Page 48...
  • Page 49 Fan or venter motor 1. Low or high voltage supply. 1. Correct electric supply. cuts out on overload 2. Defective motor. 2. Replace motor. 3. Poor airflow. 3. Clean motor, fan, and fan guard. Form I-UEAS, P/N 221232 R6, Page 49...

  • Page 50: Appendix

    The level of concentration is dependent upon the environment where the appliance is installed and may be as high as 6PH. DO NOT USE COP- PER OR COPPER BASED ALLOYS FOR CONDENSATE DRAINS. Form I-UEAS, Page 50...

  • Page 51: Index

    High Altitude 8 (Option CC2) 27 High Altitude Capacity 12 High Altitude Derate 11 Horizontal Vent/Combustion Air Kit Option Warranty 3 CC6 20 Wiring Diagram 31 Horizontal Vent/Combustion Air Terminal (Option CC6) 23 Form I-UEAS, P/N 221232 R6, Page 51...
  • Page 52 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...

This manual is also suitable for:

Ueas 130Ueas 180Ueas 260Ueas 310

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