Reznor UDX User Manual

2
I-UBX-UBZ-UDX-UDZ (03-21) 1034344-0
TABLE OF CONTENTS
GENERAL INFORMATION ................................................................... 3
References .............................................................................. 4
Important Safety Information................................................................. 4
Certification .............................................................................. 4
Warranty ................................................................................ 5
Installation Codes ......................................................................... 5
Unit Location ............................................................................. 5
Heater Throw............................................................................. 5
Mounting Height Requirements............................................................... 7
Hazards of Chlorine........................................................................ 7
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Clearances ............................................................................. 10
Weights ................................................................................ 10
Combustion Air Requirements .............................................................. 11
Acoustical Considerations.................................................................. 12
Technical Data .......................................................................... 12
INSTALLATION ........................................................................... 16
Unpacking and Inspection.................................................................. 16
Pre-Installation Checklist................................................................... 16
Heater Suspension ....................................................................... 17
Suspension of Heater with Downturn Nozzle ................................................. 18
Suspension of Heater Using Option CK8 or CK10 Hanger Kit.................................... 18
Suspension of Heater Using Option CK22 Hanger Kit .......................................... 18
Heater Suspension Using Field-Supplied Threaded Rods....................................... 19
Piping Connections ....................................................................... 19
Gas Supply Pressure ................................................................... 19
Gas Supply Piping ..................................................................... 19
Supply Piping Connections .............................................................. 20
Electrical Connections..................................................................... 21
CONTROLS .............................................................................. 23
Pressure Switch ......................................................................... 23
High Temperature Limit Control ............................................................. 25
Flame Rollout Switch (UDX Model Unit Sizes 030–125)........................................... 25
Interlock Door Switch (UBZ and UDZ Models) .................................................. 25
Main Operating Gas Valve ................................................................. 25
Fan Motor .............................................................................. 25
Venter Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Thermostat Options....................................................................... 26
Circuit Board (DSI Control Module)........................................................... 26
OPERATION ............................................................................. 27
Pre-Startup Checklist ..................................................................... 27
Startup................................................................................. 27
Startup Procedure ..................................................................... 27
Operating Sequences................................................................... 29
Vent System Testing ................................................................... 31
Post-Startup Checklist..................................................................... 32

Reznor UDX Specifications

General

Brand	Reznor
Model	UDX
Category	Heater
Language	English