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
13
I-UBX-UBZ-UDX-UDZ (04-21) 1034344-0
Table 10. Technical Data for UBX and UBZ Models (Unit Sizes 150–400)
Parameter
Unit Size
Unit of
Measurement
150 175 200 225 250 300 350 400
Input heating capacity
150,000 175,000 200,000 225,000 250,000 300,000 350,000 400,000 BTUh
43.9 51.2 58.6 65.9 73.2 87.8 102.5 117.1 kW
Thermal efficiency 83 83 83 83 82 %
Output heating capacity
1
124,500 145,250 166,000 186,750 207,500 249,000 290,500 328,000 BTUh
36.4 42.5 48.6 54.7 60.8 72.9 85.1 96.0 kW
Gas connection, natural
2
1/2 1/2 3/4 3/4 3/4
Inches
Gas connection, propane
2
1/2 1/2 3/4 3/4 3/4
Vent connection diameter
3
5 5 5 6 6
Combustion air inlet diameter
(UBZ models)
3
6 6 6 6
Control amps, 24V 1.0 1.0 1.0 1.0
Amps
Full load amps, 115V (UBX models) 5.9 9.6 10.5 12.7 12.7 17.7 27.3
Full load amps, 115V (UBZ models) 5.9 6.3 10.5 12.7 12.7 17.7 27.3
Maximum overcurrent protection, 115V
(UBX models)
4
15 20 25 30 30 40 60
Maximum overcurrent protection, 115V
(UBZ models)
4
15 25 30 30 40 60
Discharge air temperature rise
(minimum/maximum)
45/75 45/75 45/75 45/75 50/80 °F
Minimum air volume
1537 1793 2049 2306 2562 3074 3586 4100 cfm
43.5 50.8 58.0 65.3 72.5 87.0 101.5 116.1 Meter
3
/minute
Maximum air volume
2562 2989 3416 3843 4270 5123 5977 6185 cfm
72.5 84.6 96.7 108.8 120.9 145.1 169.2 175.1 Meter
3
/minute
Discharge air opening area
2.56 2.56 3.51 3.51 4.79 4.79 Foot
2
0.24 0.24 0.33 0.33 0.45 0.45 Meter
2
Minimum output velocity
600 700 800 657 730 642 749 856 fpm
183 213 244 200 223 196 228 261 Meter/minute
Maximum output velocity
1001 1168 1334 1095 1217 1070 1248 1291 fpm
305 356 407 334 371 326 380 393 Meter/minute
Standard blower motor size 1/4 1/2 1/2 3/4 3/4 1-1/2 2 Horsepower
Blower fan size 12 × 12 12 × 12 15 × 11 15 × 11 15 × 15 Inches
Sound level @ 15 feet 51 52 53 56 56 59 61 62 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.