Install Instructions
Table Of Contents
- UNIT HEATER INSTALLATION/OPERATION/MAINTENANCE: (MODEL UBX: STANDARD POWER VENT BLOWER TYPE, MODEL UBZ: SEPARATED-COMBUSTION BLOWER TYPE, MODEL UDX: STANDARD POWER VENT FAN TYPE, MODEL UDZ: SEPARATED-COMBUSTION FAN TYPE)
- TABLE OF CONTENTS
- GENERAL INFORMATION
- INSTALLATION
- CONTROLS
- OPERATION
- ADJUSTMENTS
- MAINTENANCE
- Service Checklist
- Maintenance Procedures
- Burner Maintenance
- Burner Orifice Maintenance
- Heat Exchanger Maintenance
- Ignition System Maintenance
- Maintenance of Fan Motor, Fan Blades, and Fan Guard
- Venter Motor and Wheel Assembly Maintenance
- Operating Gas Valve Maintenance
- Pressure Switch Maintenance
- High Temperature Limit Control Maintenance
- Flame Rollout Switch Maintenance (Model UDZ Unit Sizes 030–125 Only)
- Interlock Door Switch Maintenance (Models UBZ and UDZ Only)
- Transformer Maintenance
- Disconnect Switch Replacement (Models UBZ and UDZ Only)
- Vent or Vent/Combustion Air System Maintenance
- TROUBLESHOOTING
- INSTALLATION RECORD (TO BE COMPLETED BY INSTALLER)
- FIGURES
- Figure 1. Heater Throw Patterns (Refer to Table 2 and Table 3)
- Figure 2. Dimensions—Models UBX and UBZ (Refer to Table 4)
- Figure 3. Dimensions—Models UDX and UDZ (Refer to Table 5)
- Figure 4. Confined Space Combustion Air Openings (Refer to Table 8)
- Figure 5. Plugging Unused Suspension Points (Models UBZ and UDZ Only)
- Figure 6. Option CK8 or CK10 Hanger Kit
- Figure 7. Option CK22 Hanger Kit
- Figure 8. Heater Suspension Using Field-Supplied Threaded Rods
- Figure 9. Gas Connections
- Figure 10. Supply Wiring Entrance and Control Connection Terminal Strip
- Figure 11. Circuit Board (DSI Control Module)
- Figure 12. Component Locations (Typical)
- Figure 13. Gas Valve ON/OFF Control
- Figure 14. Pressure Switch
- Figure 15. Gas Valves
- Figure 16. Typical Burner Assembly
- Figure 17. Ignitor Spark Gap
- Figure 18. Fan Blade Positioning and Spacing
- Figure 19. Venter Motor and Wheel Assembly
- Figure 20. Replaceable Components
- Figure 21. DSI Control Module Troubleshooting Flowchart
- TABLES
- Table 1. Related Technical Manuals Available from Factory Distributor
- Table 2. Heater Throw Distances with Standard Horizontal Louvers at Mounting Heights of 5 to 18 Feet
- Table 3. Heater Throw Distances with Standard Horizontal Louvers at Mounting Heights of 1.5 to 5.5 Meters
- Table 4. Dimensions—Models UBX and UBZ
- Table 5. Dimensions—Models UDX and UDZ
- Table 6. Clearances to Combustibles
- Table 7. Unit Weights
- Table 8. Determining Confined Space Combustion Air Requirements
- Table 9. Technical Data for UBX and UBZ Models (Unit Sizes 030–125)
- Table 10. Technical Data for UBX and UBZ Models (Unit Sizes 150–400)
- Table 11. Technical Data for UDX and UDZ Models (Unit Sizes 030–125)
- Table 12. Technical Data for UDX and UDZ Models (Unit Sizes 150–400)
- Table 13. Field-Installed Options
- Table 14. Gas Supply Line Sizes
- Table 15. Gas Connection Sizes
- Table 16. Pressure Switch Settings
- Table 17. Circuit Board (DSI Control Module) Display Codes
- Table 18. Operating Sequence (Normal Heat Cycle)
- Table 19. Operating Sequence (Abnormal Heat Cycle)
- Table 20. Fault Modes
- Table 21. Required Manifold (Outlet) Gas Pressure
- Table 22. Inputs and Capacities by Elevation in US
- Table 23. Inputs and Capacities by Elevation in Canada
- Table 24. Fan Blade Spacing
- Table 25. General Troubleshooting
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I-UBX-UBZ-UDX-UDZ (04-21) 1034344-0
d. Locate burner body supports—depending on size, burner will have two or more supports.
e. At each support, remove one screw that secures support to secondary air shield.
f. While holding venturi tube, slide entire burner assembly slightly to right to disengage burner from supports on left.
g. Rotate open end of venturi tube inward toward heater and carefully pull burner assembly out of cabinet.
3. Inspect and clean burner:
NOTE: If, upon inspection, any of the burner components are damaged or deteriorated, replace
the burner assembly.
a. With burner assembly removed, shine flashlight on burner ribbons. Look for carbon buildup, scale, dust, lint,
and/or anything that might restrict flow through spaces between burner ribbons.
b. While holding burner assembly so that any foreign material will fall away from burner, use stiff bristle brush to
loosen and remove any foreign material(s).
c. If burner is excessively dirty, remove one burner end cap:
(1) Remove four screws that secure end cap to burner housing.
(2) Lightly tap end cap to remove it.
d. Clean all foreign material from burner and venturi.
e. When burner is thoroughly clean, replace end cap, ensuring that it is tight against burner housing.
4. Inspect lower part of heat exchanger:
a. With burner assembly removed, shine bright light into each heat exchanger section at burner flame entrance
of each tube.
b. With light shining into heat exchanger, observe outside for visible light. Repeat for each heat exchanger section.
c. If any light is observed, replace heat exchanger.
5. Re-install burner assembly (see Figure 16):
a. Attach burner assembly:
(1) While holding venturi tube, slide entire burner assembly into position.
(2) Align supports on left side with slots in burner shield and slide supports into slots.
(3) On right, install screw that secures each burner body support to secondary air shield.
b. Re-install secondary air baffles (unit sizes 060–400 only)—install screw that secures each baffle(s)—baffles
may be different sizes and each must be installed in correct location as marked.
c. Attach control assembly:
(1) Carefully slide control assembly into position and secure using same screws.
(2) Check to ensure that all wire connections are secure.
d. Attach gas train:
(1) Slide gas train into position so that orifice adapter is slid through bracket on burner.
(2) Secure gas train to bracket using locking nut.
(3) Install gas orifice and reconnect wires to gas valve.
e. Install access panel.
f. Reconnect gas supply at union outside of cabinet.
g. Leak test connection using leak detecting solution. If leak is detected, tighten connection. If leak cannot be
stopped by tightening connection, replace part(s).
6. Turn ON electric and gas.
7. Check for proper operation.