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
12
I-UBX-UBZ-UDX-UDZ (04-21) 1034344-0
Acoustical Considerations
Refer to sound level data listed in Technical Data section when determining unit location based on acoustical
considerations.
Technical Data
Table 9, Table 10, Table 11, and Table 12 list unit technical data.
GENERAL INFORMATION—CONTINUED
Combustion Air Requirements—Continued
Table 8. Determining Confined Space Combustion Air Requirements
Letter*
Air Source Required Opening Size
Calculate Combustion Air
Requirements
A Air inside building
1 square inch free area per 1000 BTUh
Add total BTUh of all appliances in
confined space and divide by figures
at left for square inch free area size of
each (top and bottom) opening
Never <100 square inches free area for each opening
B Outside air through duct 1 square inch free area per 2000 BTUh
C Direct outside air 1 square inch free area per 4000 BTUh
*See Figure 4.
Table 9. Technical Data for UBX and UBZ Models (Unit Sizes 030–125)
Parameter
Unit Size
Unit of
Measurement
030 045 060 075 100 125
Input heating capacity
30,000 45,000 60,000 75,000 105,000 120,000 BTUh
8.8 13.2 17.6 22.0 30.8 35.2 kWh
Thermal efficiency 82 82 83 %
Output heating capacity
1
24,600 36,900 49,200 61,500 87,150 99,600 BTUh
7.2 10.8 14.4 18.0 25.6 29.2 kWh
Gas connection, natural
2
1/2 1/2 1/2
Inches
Gas connection, propane
2
1/2 1/2 1/2
Vent connection diameter
3
4 4 4
Combustion air inlet diameter (UBZ models)
3
4 4 4
Control, 24V 1.0 1.0 1.0
Amps
Full load amps, 115V (UBX models) 3.7 7.1 13.0
Full load amps, 115V (UBZ models) 3.7 7.1 7.3 13.2
Maximum overcurrent protection (115V)
4
15 15 30
Discharge air temperature rise
(minimum/maximum)
45/75 45/75 45/75 °F
Minimum air volume
304 456 607 759 1076 1230 cfm
8.6 12.9 17.2 21.5 30.5 34.8 Meter
3
/minute
Maximum air volume
506 759 1012 1265 1793 2049 cfm
14.3 21.5 28.7 35.8 50.8 58.0 Meter
3
/minute
Discharge air opening area
0.96 1.25 2.01 Foot
2
0.09 0.12 0.19 Meter
2
Minimum output velocity
316 475 486 607 535 612 fpm
96 143 143 179 160 183 Meter/minute
Maximum output velocity
527 791 810 1012 892 1020 fpm
159 239 239 299 267 305 Meter/minute
Standard blower motor size 1/6 1/3 3/4 Horsepower
Blower fan size 9 × 6 9 × 6 10 × 10 Inches
Sound level @ 15 feet 40 40 49 54 55 dba
1
CSA ratings for elevations up to 2,000 feet.
2
Size shown is for gas connection to a single-stage gas valve—not supply line size.
3
Smaller and/or larger vent and combustion air pipe diameters may be permissible. Refer to appropriate venting instructions listed in Table 1.
4
MOCP = 2.25 × (largest motor FLA) + smallest motor FLA. Answer is rounded to the next lower standard circuit breaker size.