Reznor UEAS Installation & Operation Instruction
  1. Manuals
  2. Brands
  3. Reznor Manuals
  4. Heater
  5. UEAS
  6. Installation & operation instruction

Reznor UEAS Installation & Operation Instruction

High-efficiency, separated-combustion, low static unit heater
Hide thumbs Also See for UEAS:
Table of Contents

Advertisement

Quick Links

See also: Installation, Operation & Maintenance Manual
®
!
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.
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.
Installation / Operation / Maintenance
Keep this booklet for future reference.
Form I-UEAS (Version B)
Obsoletes I-UEAS (Version A)
Applies to: Model UEAS,
High-Efficiency, Separated-
Combustion, Low-Static
Form I-UEAS, P/N 221232 R11, Page 1
Unit Heater
CQS
CQS

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the UEAS and is the answer not in the manual?

Questions and answers

Related Manuals for Reznor UEAS

Summary of Contents for Reznor UEAS

  • 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 R11, 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

    Information tions in this manual apply only to Model UEAS heaters. Model UEAS heaters are available for use with either natural or propane gas. The type of gas, the input rate, and the electrical supply requirement are shown on the heater rating plate.

  • Page 4: Unit Heater Location

    Y = Distance to end of floor coverage **Z = point when the air velocity drops below 50 ft (15.2M) per minute Dimensions X, Y, and Z (feet) Model UEAS with Standard Horizontal Louvers at Mounting Heights of 5 - 18 ft Louver...

  • Page 5: Receiving, Uncrating, And Preparing For Installation

    Dimensions X, Y, and Z (meters) Model UEAS with Standard Horizontal Louvers at Mounting Heights of 1.5 - 5.5M Louver Louver Louver Louver Angle* Angle* Angle* Angle* 2.4 M -26° -20° -24° -20° 3.0 M -32° -25° -29° -25° 3.7 M -39°...

  • Page 6: Dimensions And Clearances

    Other shipped-separate items could include a thermostat bracket kit, a thermostat, and/or a thermostat guard. Be sure all options ordered are at the installation site. 4.0 Dimensions and 4.1 Dimensions Clearances FIGURE 2 - Model UEAS Dimensions Disconnect Switch Line Voltage Entrance (connects in sealed electrical box) 5-5/8” (143mm) External Gas Connection 1-9/16”...

  • Page 7: Clearances

    The heater has four-point suspension. Suspension point dimensions are shown in FIGURE 2, page 6. A 3/8”-16 threaded nut retainer is located at each suspension point (FIGURE 4A). Form I-UEAS, P/N 221232 R11, Page 7...

  • Page 8: Mechanical

    If the gas at the installation does not meet these specifications, con- sult the factory for proper orificing. Pipe joint compounds (pipe dope) shall be resistant to the action of liquefied petro- leum gas or any other chemical constituents of the gas being supplied. Form I-UEAS, Page 8...

  • Page 9: Gas Connection

    Illustration shows (horizontal or vertical) both a vertical and horizontal gas supply; Pipe nipple extending outside the cabinet. requirements are the Manual shutoff same. To Gas Valve (inside the cabinet) Drip Ground Joint Union Form I-UEAS, P/N 221232 R11, Page 9...
  • Page 10 Derate by Valve Outlet Pressure Adjustment for 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 High Altitude Operation supplier. Form I-UEAS, Page 10...
  • Page 11 Be sure the surface is clean and dry and adhere the label. The input and/or the capacity of the heater changes with the derate. The tables below (page 12) list inputs and capacities at altitudes from sea level to 10,000 ft (3045M). Form I-UEAS, P/N 221232 R11, Page 11...

  • Page 12: Conversion Instructions

    7.1.3 Valve Outlet or Orifice Pressure Setting (cont’d) (cont’d) Instructions for High Altitude Derate (cont’d) 7.1 Gas Piping and High Altitude Capacity Changes Pressure (cont’d) BTUH Inputs and Capacities by Altitude in the UNITED STATES for Model UEAS Normal Thermal Output Normal Thermal Output Normal...

  • Page 13: Venting And Combustion Air

    Option CC2) are the only venting/combustion air systems approved for high effi- ciency 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: 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 26, for requirements on installing the condensate drain.) All drain parts except the 4” PVC cap shown here are field supplied. Form I-UEAS, Page 14...
  • Page 15 Chamfer (bevel) the end of the pipe 10° to 15°. b) Use a clean dry cloth to remove surface dirt, grease, and moisture from the pipe sections and fittings. Form I-UEAS, P/N 221232 R11, Page 15...
  • Page 16 UEAS 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, Page 16...
  • Page 17 Vent Pipe - Do not install the vent piping near any high temperature steam lines, radiant heaters, or other sources of heat. Clearance All Model UEAS installations require a concentric adapter box as illustrated in FIG- 7.2.1.9 Concentric URES 11, 12, 13, and 14. The concentric adapter box is included in both the hori- Adapter Box zontal and vertical vent/combustion air kits.
  • Page 18 4” vent pipe that extends through its center. Connections Concentric Adapter Silicone Box Connections Sealing Ring for a Model UEAS High Efficiency Heater HORIZONTAL OR VERTICAL VENT TERMINAL? FIGURE 15 - Is Vertical, the Separated- Option CC2, Combustion Vent/...
  • Page 19 Failure to comply could result in severe personal injury or death and/or property damage. WARNING In climates with below freezing temperatures, condensate may form icicles on the vent terminal. Locate the terminal where a falling icicle would not be a hazard. Form I-UEAS, P/N 221232 R11, Page 19...

  • Page 20: Combustion Air

    4c) Attach the inlet air guard. Position the inlet air ring guard over the end of the combustion air pipe. See FIGURE 16. Attach the guard to the inlet air pipe with the four 1/2” long screws provided. Form I-UEAS, Page 20...
  • Page 21 FIGURE 16 - Typical Installation of a Model UEAS High Efficiency, Separated-Combustion Unit with a Horizontal Vent/Combustion Air Terminal (Option CC6) One-piece, 4” dia, Minimum Schedule 40 PVC 4” (102mm) or CPVC Vent Pipe Maximum Use the brackets on sides of box and field-supplied 16”...
  • Page 22 Package (Option CC2) 221215 Bird Guard 37661 Screws for Bird Guard. #10x1/2" self-drilling 221250 Combustion Air Inlet 221185 Rain Collar 4" PVC Cap for Vent Condensate Drain Connection (See 221091 FIGURE 8A and 9A on page 14.) Form I-UEAS, Page 22...
  • Page 23 (Hardware and flashing are field supplied.) On the inside, insert the combustion air pipe up through the opening, position the box to match the pipe runs, and attach the brackets to the roof. Form I-UEAS, P/N 221232 R11, Page 23...
  • Page 24 Pipe with Box Attached 18” (457mm) minimum to Under Side of Roof (NOTE: Maximum Outside view with concentric from concentric adapter box attached to adapter box is 48” (1219mm). underside of roof. Install field-supplied flashing at roof opening. Form I-UEAS, Page 24...
  • Page 25 Verify compliance with all venting installation requirements, pages 13-18, 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) Bird Guard installed...

  • Page 26: Condensate Drain System

    NOTE: Actual ph may vary ± 1 depending upon fuel and combus- tion air.) Model UEAS Sizes 130 and 180 will produce approximately one gallon (4 liters) of condensate per hour. Sizes 260 and 310 will produce approximately two gallons (8 liters) of condensate per hour.
  • Page 27 Drain Trap 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 R11, Page 27...

  • Page 28: Electrical And Wiring

    FIGURE 24 - Gas Connection 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 28...

  • Page 29: Typical Wiring Diagram

    8. VERIFY JUMPER ON CL22 THERMOSTAT TERMINALS R TO RC. WD# 230300 REV. #2 9. FAN SWITCH OR LOW STAGE OF CL22 THERMOSTAT ENERGIZES THE BLOWER MOTOR. 10. HIGH STAGE OF CL22 THERMOSTAT INITIATES A CALL FOR HEAT. Form I-UEAS, P/N 221232 R11, Page 29...

  • Page 30: 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. Pressure Switch Startup...

  • Page 31: Ignition System

    2. 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 service panel has a pliable gasket material that fully seals the door to provide added protection from building air entering the combustion zone of the heater.
  • Page 32 (This fan delay is self-healing feature for an open auxiliary limit switch). If flame is not established on the third trial for ignition period, the control de-ener- gizes the gas valve, and the venter motor remains energized for an inter-purge Form I-UEAS, Page 32...
  • Page 33 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, P/N 221232 R11, Page 33...

  • Page 34: Commissioning And Startup

    • Before operating, smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor. Form I-UEAS, Page 34...
  • Page 35 2) If service is to be performed, turn off all electric power to the appliance. 3) Open the access door. 4) Turn the gas control switch “OFF” or the knob clockwise to “OFF” (Do not force.) 5) Close the access door. Form I-UEAS, P/N 221232 R11, Page 35...

  • Page 36: Check Installation After Startup

    • Clean the condensate traps. • Check the heat exchanger both internally and externally. • Check the burner for scale, dust, or lint accumulation. Clean if needed. • Check gas valve to ensure that gas flow is being shutoff completely. Form I-UEAS, Page 36...

  • Page 37: Maintenance Procedures

    Orifice Adapter Secondary Locking Nut Air Shield Burner Orifice Venter Venturi Tube Valve Slide right; rotate inward; pull out. Secondary Air Baffle (Qty varies per size.) Mark locations before removing. Form I-UEAS, P/N 221232 R11, Page 37...
  • Page 38 If ordering a replacement orifice only, give BTUH content and specific gravity of gas, as well as the model and serial number of the unit. When removing or replac- ing the burner orifice, be careful not to damage the venturi tube and/or the bracket. Form I-UEAS, Page 38...
  • Page 39 1.0 microamps as measured by a microampmeter. NOTE: For additional information and check out procedure on the direct spark ignition system, refer to Paragraph 10 and the Troubleshooting Flow Chart in Para- graph 12.3. Form I-UEAS, P/N 221232 R11, Page 39...
  • Page 40 Venter motor bearings are permanently lubricated. Wheel, and Pressure Follow these instructions for replacement of the venter motor and wheel assembly. Sensing Tap Keep all hardware removed to be used in re-assembling and installing the replace- ment parts. Form I-UEAS, Page 40...
  • Page 41 For approximate limit location, see FIGURE 28, page 39. 12.2.10 Door Switch Door Switch If it is determined that the door switch needs replacing, use only a factory-autho- rized replacement part that is designed for the heater. Form I-UEAS, P/N 221232 R11, Page 41...
  • Page 42 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 42...

  • Page 43: 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 R11, Page 43...

  • Page 44: General Troubleshooting

    Supply pressure should be 5" - 14" w.c. for natural gas or 11" - 14" w.c. for propane. d) Cracked ceramic at sensor. d) Replace sensor. 11. Faulty time delay relay. 11. Replace time delay relay. Form I-UEAS, Page 44...
  • Page 45 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 R11, Page 45...

  • Page 46: 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 COPPER OR COPPER BASED ALLOYS FOR CONDENSATE DRAINS. Form I-UEAS, Page 46...

  • Page 47: Index

    Vertical Vent/Combustion Air Terminal High Altitude Capacity 12 (Option CC2) 25 High Altitude Derate 10 Horizontal Vent/Combustion Air Kit Option CC6 19 Warranty 3 Horizontal Vent/Combustion Air Terminal Wiring Diagram 29 (Option CC6) 21 Form I-UEAS, P/N 221232 R11, Page 47...

  • Page 48: 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 800-695-1901.

This manual is also suitable for:

Ueas 130Ueas 180Ueas 260Ueas 310

Table of Contents