Reznor UBX Manual

Name: Reznor UBX
Brand: Reznor
Rating: 4 (1 reviews)

60 pages

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Figure 24. Circuit Board (DSI Control Module)

CONTROLS

NOTE: Refer to the Troubleshooting section for probable causes and reset instructions for the

following controls.

Locations for the following controls are shown in Figure 25.

I-UEZ (04-21) 1034347-0

Table of Contents2
General Information4
References4
Important Safety Information4
Certification5
Warranty5
Installation Codes5
Unit Location5
Heater Throw6
Mounting Height Requirements7
Hazards of Chlorine7
Dimensions7
Clearances8
Weights9
Venting and Combustion Air Requirements9
Vent/Combustion Air System Piping Requirements9
Vent/Combustion Air System Piping Joints11
Vent/Combustion Air System Piping Support12
Technical Data13
Installation14
Unpacking and Inspection14
Pre-Installation Checklist14
Heater Suspension15
Suspension of Heater with Downturn Nozzle15
Piping Connections16
Gas Supply Pressure16
Gas Supply Piping16
Supply Piping Connections17
Concentric Adapter Box Connections18
Vent Terminal Options20
Vertical Vent Terminal (Option CC2) Installation20
Horizontal Vent Terminal (Option CC6) Installation24
Condensate Drain Installation28
Vent Condensate Drain Installation29
Heat Exchanger Condensate Drain Installation32
Electrical Connections32
Controls33
Thermostat Options34
Main Operating Gas Valve35
Pressure Switch35
High Temperature Limit Control35
Vent Temperature Limit Switch36
Interlock Door Switch36
Fan Motor36
Circuit Board (DSI Control Module)36
Venter Motor36
Operation37
Pre-Startup Checklist37
Startup38
Startup Procedure38
Operating Sequences39
Vent System Testing41
Post-Startup Checklist42
Adjustments42
Pressure Switch Replacement42
Measure and Adjust Manifold (Outlet) Gas Pressure43
Measure and Adjust Manifold Gas Pressure-Elevation ≤2,000 Feet (≤610 Meters)43
For Installations at High Elevations, Measure and Adjust the Manifold (Outlet) Gas Pressure as Follows45
Converting Unit from Natural Gas to Propane46
Maintenance47
Service Checklist47
Maintenance Procedures48
Burner Maintenance48
Burner Orifice Maintenance50
Heat Exchanger Maintenance50
Ignition System Maintenance50
Maintenance of Fan Motor, Fan Blades, and Fan Guard51
Venter Motor, Wheel, and Pressure Sensing Tap Maintenance52
Operating Gas Valve Maintenance53
Pressure Switch Maintenance53
High Temperature Limit Control Maintenance53
Interlock Door Switch Maintenance53
Transformer Maintenance53
Vent Temperature Limit Switch Maintenance54
Disconnect Switch Replacement54
Vent or Vent/Combustion Air System Maintenance54
Condensate Drain System54
Troubleshooting54
Unit Troubleshooting Using DSI Control Module54
General Troubleshooting56
Installation Record (to be Completed by Installer)60

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Reznor UBX Specifications

General

Brand	Reznor
Model	UBX
Category	Gas Heater
Language	English

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