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
37
I-UBX-UBZ-UDX-UDZ (04-21) 1034344-0
MAINTENANCE
⚠ WARNING ⚠
If you turn OFF the electrical power supply, turn OFF the gas.
⚠ CAUTION ⚠
• Eye protection is recommended when cleaning unit.
• When any service is completed, ensure that the unit is reassembled correctly so that no unsafe
conditions are created.
• When re-lighting, always follow the lighting instructions on the heater.
• If any of the original wire supplied with the appliance must be replaced, it must be replaced with
wiring material having a temperature rating of at least 105°C, except for limit control, flame rollout,
and sensor lead wires which must be rated at 150°C.
• If replacement parts are required, use only factory-authorized parts.
NOTE: To ensure long life and satisfactory performance, a heater that is operated under normal
conditions should be inspected and cleaned at the start of each heating season. If the heater is
operating in an area where an unusual amount of dust or soot or other impurities are present in
the air, more frequent maintenance is recommended.
The unit is designed to operate with a minimum of maintenance. However, to ensure long life and satisfactory
performance, routine service is recommended. When servicing, follow standard safety procedures and those specific
instructions and warnings in this manual.
Service Checklist
The following section is designed to aid a qualified service person in maintaining and servicing this equipment. At a
minimum, perform the following annually (see Figure 12 for component locations):
Inspect burner/control compartment annually to determine if cleaning is necessary
Clean all dirt, lint, and grease from combustion air opening (models UBX and UDX) and venter assembly
Clean all dirt, lint, and grease from fan blade, fan guard, and motor
Check heat exchanger both internally and externally
Check burner for scale, dust, or lint accumulation and clean if needed
Check gas valve to ensure that gas flow is being shut off completely
Check vent or vent/combustion air system for soundness and clean openings
Replace any parts that do not appear sound
Check for any damaged wiring and replace as necessary
Maintenance Procedures
Burner Maintenance
Visually inspect the burner compartment (see Figure 16). If there is an accumulation of dirt, dust, and/or lint,
clean the compartment and remove and clean the burner as follows: