Reznor UDBP Installation & Operation Manual
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Reznor UDBP Installation & Operation Manual

V3 series high static blower-type unit heaters
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See also: Installation Operation & Maintenance
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.
�
���
Obsoletes Form I-UDB (Version A)
Installation/Operation
Applies to: Model UDBP
�
Blower-Type Unit Heaters
Form I-UDB (Version B)
and Model UDBS
Series High Static
Form I-UDB, P/N 202658 R10, Page 1

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Summary of Contents for Reznor UDBP

  • Page 1 Form I-UDB (Version B) Obsoletes Form I-UDB (Version A) � Installation/Operation Applies to: Model UDBP and Model UDBS � Series High Static Blower-Type Unit Heaters ��� WARNING: FIRE OR EXPLOSION HAZARD Failure to follow safety warnings exactly could result in serious injury, death, or property damage.

  • Page 2: Table Of Contents

    APPENDIX ............42 6.0 Mechanical ........... 12-20 6.1 Gas Piping and Pressures ......12 INDEX ............... 43 6.2 Combustion Air - Models UDBP ....16 INSTALLATION RECORD ......44 6.3 Unit Discharge ..........17 6.4 Blowers, Belts, and Drives ......18 1.0 General...

  • Page 3: General Installation Information

    1.2.1 Certification 1.2 General Model UDBP 30 - 400 and Model UDBS 30 - 400 are design certified by the Canadian Installation Standards Association for use in industrial and commercial installations. Information All models and sizes are available for use with either natural or propane gas.

  • Page 4: Unit Heater Location

    ����������������������������������������������� vers and/or downturn nozzles. ��������������������������������������������������� ������������������������������������� ���������������������������������������������������������������������������� Dimensions X, Y, and Z (feet) Model UDBP and Model UDBS with Standard Horizontal Louvers at Mounting Heights of 5-18 ft Motor Louver Louver Louver Louver...
  • Page 5 18 ft -41° -32° -29° 47 153 -32° -28° -34° -29° -29° Dimensions X, Y, Z (meters) Model UDBP and Model UDBS with Standard Horizontal Louvers at Mounting Heights of 1.5 - 5.5M Motor Louver Louver Louver Louver Louver Louver Speed...

  • Page 6: Heater Sound Data

    15 feet (4.5M) for Sizes 30-125 at dBA at 15 feet (4.5M) for Sizes 150-400 at Temperature Rises Low, Medium, and High Blower Speeds Listed Model UDBP or UDBS Model UDBP or UDBS Blower Temperature 350 400 *...

  • Page 7: Uncrating And Preparation

    3.2.1 Field-Installed Parts If installing a Model UDBP or UDBS 150-400 ordered for use with 460 or 575 supply voltage, a field-installed 500VA transformer is shipped separately. Be sure the trans- former is there and follow the instructions in Paragraph 7.2 to attach it to the factory- installed bracket.

  • Page 8: Clearances And Dimensions

    Clearance to combustibles is defined as the minimum distance from the heater to a surface or object that is necessary to ensure that a surface temperature of 90°F above the surrounding ambient temperature is not exceeded. FIGURE 4 - Clearances 30-125 150-400 UDBP and UDBS ������������������������� Sizes inches inches ����������������������...

  • Page 9: Dimensions

    4.2 Dimensions FIGURE 5 - Model UDBP, Power Vented Fan Model �������������������� ���������� ���������� ����������������� ������������������� ���� ���� � � � � ��� �������������������������� � ������������������������������ � �������� ����������������� � � �������������� ��������������� ���������� ����������� ������� ������������ ����������� ����������� ������������...
  • Page 10 4.0 Clearances and Dimensions (cont’d) 4.2. Dimensions (cont’d) FIGURE 6 - Model UDBS, Separated Combustion Fan Model �������������������������� ������������������������ ��������������������� ������������������� ���������������� ���� ���� � � � � ��� �������������������������� � �������� ����������������������������� � ����������������� ��������������� � � �������������� ���������� �����������...

  • Page 11: Hanging The Heater

    Before hanging, verify that any screws used for holding shipping brackets were re-installed in the cabinet. NOTE: If installation of a Model UDBP or UDBS Size 30-125 includes an optional step- down transformer (Option CG2 or CG4), attaching the transformer bracket is part of the suspension procedure.

  • Page 12: Mechanical

    5.0 Hanging the If ordered with swivel connectors for 1” pipe, Option CK10, use field-supplied hardware to attach the swivels at the suspension holes. Suspend with 1” pipe. See FIGURE 8. Heater (cont’d) FIGURE 8 - Swivel ������������� Connectors to Suspend the Heater from 1”...
  • Page 13 Sizing Gas Supply Capacity of Piping Line Cubic Feet per Hour based on 0.3" w.c. Pressure Drop Specific Gravity for Natural Gas -- 0.6 (Natural Gas -- 1000 BTU/Cubic Ft) Specific Gravity for Propane Gas -- 1.6 (Propane Gas -- 2550 BTU/Cubic Ft) Length Diameter of Pipe 1/2"...
  • Page 14 6.0 Mechanical 6.1.2 Valve Outlet or Orifice Pressure Setting (cont’d) (cont’d) Before attempting to measure or adjust valve outlet gas pressure, the inlet supply pressure must be within the specified range both when the heater is in operation and 6.1 Gas Piping on standby.
  • Page 15 The input and/or the capacity of the heater changes with the derate. The tables below High Altitude 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 UDBP and Model UDBS Normal Thermal Output Minimum...

  • Page 16: Combustion Air - Models Udbp

    6.0 Mechanical 6.1.3 Derate by Valve Outlet Pressure Adjustment for High Altitude (cont’d) Operation (cont’d) High Altitude BTUH Inputs and Capacities by Altitude in the UNITED STATES for Model UDBP and Model UDBS (cont'd) Normal Thermal Output Minimum Normal Thermal Output...

  • Page 17: Unit Discharge

    100, 125 13-13/16 ��������������� 150, 175, 200 225, 250 � 300, 350, 400 ���� ���������� FIGURE 13 - Polytube Adapter Dimensions and Requirements for field-supplied Polytube UDBP & UDBS 16-15/16 10-3/8 inches � � 10-3/8 �������� inches 100, 125 ��������...

  • Page 18: Blowers, Belts, And Drives

    FIGURE 13 (cont’d) - Requirements for field-supplied Polytube Duct 6.0 Mechanical (cont’d) Suggested Hole Sizes and Locations by Length Polytube Approximate CFM at 60°F Length of Polytube Size Diameter Free Area Polytube 6.3 Unit Discharge Temp Rise (inches) (square inches) Holes 50 Ft 75 Ft...
  • Page 19 If the duct resistance is low, the blower may deliver too high an air volume; or if the heater is operated without ductwork, the blower may deliver excess air to overload the motor, causing the overload protector to cycle the motor. Reducing the blower speed will correct these conditions.

  • Page 20: Electrical Supply And Wiring

    6.0 Mechanical 6.4.3 Blower and Belt Guards (cont’d) Guard options are designed to provide complete protection from the rotating drive and blower. Guards ordered as Option AZ6 or AZ7 are factory installed. Guards ordered as 6.4 Blowers, Belts, Option CD10 or CD12 are shipped separately for field installation. The blower guard and Drives only (Options AZ7 and CD12) is for Sizes 30-125 which have a direct drive motor.

  • Page 21: Control Wiring Connections

    Model UDBP supply wiring connections are made in the control compartment; Sizes 30-125 to leads from the circuit board and Sizes 150-400 directly to the terminals on the starter or contactor.

  • Page 22: Wiring Diagrams

    7.0 Electrical 7.4 Wiring Diagrams Supply and FIGURE 18A - Typical Wiring Diagram for Model UDBP or Model UDBS Wiring (cont’d) Sizes 30-125, Single Stage 40 VA OPTIONAL FACTORY 115/1/60 SYSTEM TRANSFORMER WIRING WIRE CONNECTOR FACTORY WIRING FIELD WIRING SCREW...
  • Page 23 FIGURE 18B - Typical Wiring Diagram for Model UDBP or Model UDBS, Sizes 30-125, Two Stage 40 VA 115/1/60 SYSTEM TRANSFORMER WIRING CODE BLACK - BK BROWN - BR RED - R ORANGE - O YELLOW - Y GREEN - G...
  • Page 24 7.0 Electrical Supply and Wiring (cont’d) 7.4 Wiring Diagrams FIGURE 18C - Typical Wiring Diagram for Model UDBP or Model UDBS, (cont’d) Sizes 150-400, Single Stage CUSTOMER'S BLOWER MOTOR DISCONNECT SWITCH CONTACTOR CONTACTS INTERNALLY PROTECTED R OR W BLOWER FACTORY WIRING...
  • Page 25 FIGURE 18D - Typical Wiring Diagram for Model UDBP or Model UDBS, Sizes 150-400, Two Stage CUSTOMER'S BLOWER MOTOR DISCONNECT SWITCH CONTACTOR CONTACTS INTERNALLY PROTECTED R OR W BLOWER MOTOR FACTORY WIRING FIELD WIRING OPTIONAL FACTORY WIRING R OR BK...

  • Page 26: Electrical Operating Components

    Supply The combustion air proving switch is a pressure sensitive switch that monitors air pres- sure to ensure that proper combustion airflow is available. On Model UDBP, the switch and Wiring is a single pole/normally open device which closes when a negative pressure is sensed (cont’d)

  • Page 27: Controls And Operation

    7.5.4 Gas Valve The main operating gas valve is powered by the 24-volt control circuit through the ther- mostat and safety controls. The main control valve is of the diaphragm type providing regulated gas flow preset at the factory. (For location, see FIGURE 22, page 35.) WARNING: The operating valve is the prime safety shutoff.

  • Page 28: Ddc Controls, Options D10 And D14

    8.2 DDC Controls, Options D10 and D14 8.0 Controls and Operation If the heater was ordered with Option D10 or D14, it is equipped with a Novar® Minio control module. The Novar control with its accompanying relays and power transformer (cont’d) are mounted in the control compartment of the unit.

  • Page 29: Ignition System

    LED leave the venter motor energized indefinitely as long as the call for heat remains and lights on Model UDBP. the pressure 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.
  • Page 30 8.0 Controls and Normal Heat Cycle Operating Sequence (cont’d) Operation 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. (cont’d) When the thermostat call for heat is removed, the control de-energizes the gas valve and begins post-purge and fan/blower off delay timing.
  • Page 31 Continuous Blower When the thermostat calls for continuous blower (G) without a call for heat, the blower motor is energized after a .25 second delay. NOTE: This brief on delay is to allow the Operation “G” terminal to energize slightly before “Y” and an external changeover relay to switch from “G”...

  • Page 32: 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. Requirements are in Paragraph 4.1.  Check vent system to be sure that it is installed according to the instructions in the appropriate Vent Installation Manual as listed in Paragraph 1.2.2.

  • Page 33: Check Installation After Startup

    FIGURE 17 - Gas Valve 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 ON/OFF Control Knob gas control (ON/OFF) knob on the gas valve. (See FIGURE 17.) 4.

  • Page 34: Maintenance And Service

    Paragraph 6.2. 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. Model UDBP units installed in a confined space must be supplied with air for combustion as required by Code and in Paragraph 6.2 of this heater installation manual.

  • Page 35: Maintenance Procedures

    • 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. • Check the vent or vent/combustion air system for soundness. Clean openings.
  • Page 36 Then rotate the open end of the venturi tube inward toward the heater. Carefully pull the burner assembly out of the cabinet. FIGURE 23 - Burner Removal (UDBP ��������������������������������������������� illustrated; same �����������������������������������������������...
  • Page 37 Clean all foreign material from the burner and venturi. After the burner is thoroughly clean, replace the end cap making certain that it is tight against the burner housing. NOTE: If any of the burner components are damaged or deteriorated, replace the burner assembly.

  • Page 38: Gas Valve

    10.0 Maintenance 10.2.4 Ignition System (cont’d) and Service FIGURE 25 - Ignitor (cont’d) showing required Spark �������� Gap measurement 10.2 Maintenance ������� Procedures Flame Sensor - Refer to FIGURE 22 and locate the flame (cont’d) sensor. Disconnect the wire; remove the screw and the flame sensor.
  • Page 39 The combination gas valve must be checked annually to ensure that the valve is shut- ting off gas flow completely. Instructions: 1) Locate the 1/8” NPT pressure tap on the combination valve. FIGURE 27 - Pressure Two-Stage Valve Single-Stage Tap for Checking Gas 1/8”...

  • Page 40: Troubleshooting

    LED is visible through viewport on Model UDBS. Remove (Circuit Board) access panel on Model UDBP. 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.

  • Page 41: General Troubleshooting

    General Troubleshooting PROBLEM PROBABLE CAUSE REMEDY Venter motor will not 1. No power to unit. 1. Turn on power; check supply fuses or main circuit breaker. Turn on built-in control switch (Model UDBS start only); replace switch if not operating. 2.

  • Page 42: Appendix

    APPENDIX TECHNICAL DATA - Sizes 30 - 125 (Data applies to both Models UDBP and UDBS unless noted otherwise.) Size BTUH 30,000 45,000 60,000 75,000 105,000 120,000 Input Heating Capacity kw/h 13.2 17.6 22.0 30.8 35.2 Thermal Efficiency (%) BTUH...

  • Page 43: Index

    WHAT TO DO IF YOU SMELL GAS 32 Option CC2 or CC6 3, 7 Wiring Connections 21 Option CD 2, 3, or 4 8 Wiring Diagram for Model UDBP or Electrical Supply 20 Option CL31 27 UDBS, Sizes 150-400, Single Stage...

  • Page 44: 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. Reznor/Thomas & Betts 150 McKinley Avenue Mercer, PA 16137 www.RezSpec.com...

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