Reznor UBXC User Manual

2
UBXC-UDXC-IOM (01-24) 1042980-0
TABLE OF CONTENTS
GENERAL INFORMATION .....................................................................4
Important Safety Information ..................................................................4
Warranty ..................................................................................5
Model Configuration .........................................................................5
Certification ...............................................................................5
Installation Codes ...........................................................................5
Heater Location ............................................................................6
Clearances .............................................................................6
Heater Throw Distances with Standard Horizontal Louvers........................................6
Mounting Height Requirements .............................................................12
Hazards of Chlorine ......................................................................12
Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Weights ..................................................................................16
Combustion Air Requirements .................................................................16
INSTALLATION .............................................................................17
Unpacking and Inspection ....................................................................17
Pre-Installation Checklist .....................................................................17
Heater Suspension ..........................................................................18
Suspension of Heater Using Option CK8 or CK10 Hanger Kit......................................19
Suspension of Heater Using Option CK22 Hanger Kit (Model UDXC, Unit Sizes 30–125) . . . . . . . . . . . . . . . . 19
Heater Suspension Using Field-Supplied Threaded Rods.........................................19
Suspension of Heater with Downturn Nozzle ...................................................19
Piping Connections .........................................................................20
Gas Supply Pressure .....................................................................20
Gas Supply Piping .......................................................................20
Supply Piping Connections ................................................................21
General Requirements for Vent Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Condensation Mitigation...................................................................22
Vent System Support Requirements .........................................................22
Vent System Sealing .....................................................................22
Vent Terminal Requirements ...............................................................24
Vent Connections for Standard Units ............................................................26
Installation Methods ......................................................................26
Venter (Flue) Outlet Diameter ..............................................................27
Category III Venting ......................................................................27
Category III Commercial/Industrial Installations .................................................29
Category III Residential Installations (Model UDXC) .............................................30
Category I Venting .......................................................................31
Category I Commercial/Industrial or Residential (Model UDXC) Installations with Vertical Dedicated Vent ...32
Category I Residential Installations with Common Vent (Model UDXC) ..............................32
Category I Residential Installations with Dedicated Vent (Model UDXC)..............................34
Electrical Connections .......................................................................35
Supply Wiring Connection .................................................................36
Control Connections......................................................................37

Reznor UBXC Specifications

General

Brand	Reznor
Model	UBXC
Category	Gas Heater
Language	English