Reznor VZ - Table of Contents

2
VZ-VZH-VZT-IOM (08-24) 1047121-A
TABLE OF CONTENTS
GENERAL INFORMATION ...................................................................3
Model Features ...........................................................................3
Important Safety Information.................................................................3
Warranty ................................................................................4
Certification ..............................................................................4
Installation Codes .........................................................................4
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Heater Location...........................................................................8
Clearances ............................................................................8
Halogenated Hydrocarbons ..............................................................11
Mounting Height Requirements ...........................................................11
Weights ................................................................................11
SYSTEM CONFIGURATIONS ................................................................12
Straight Tube Configurations................................................................12
U-Tube Configurations ....................................................................13
L-Tube Configurations.....................................................................14
INSTALLATION ...........................................................................14
Unpacking and Inspection..................................................................14
Pre-Installation Checklist...................................................................14
Tube Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Suspension Bracket and Reflector Installation ..................................................18
Heater Suspension .......................................................................21
Vent Connections ........................................................................25
Venting General Requirements ...........................................................25
Vent Material Recommendations ..........................................................25
Vent/Combustion Air Duct Length Requirements..............................................25
Vent Terminal Requirements .............................................................26
Unvented Units........................................................................27
Vertical Venting .......................................................................27
Horizontal Venting .....................................................................29
Common Venting ......................................................................30
Combustion Air Connections................................................................31
Installations That Require Outside Combustion Air ............................................31
Installations That Do Not Require Outside Combustion Air ......................................33
Piping Connections .......................................................................33
Gas Supply Pressure ...................................................................33
Gas Supply Piping .....................................................................33
Supply Piping Connections ..............................................................34
Electrical Connections.....................................................................36
Supply Wiring Connection ...............................................................37
Control Wiring Connections ..............................................................37
CONTROLS ..............................................................................39
Pressure Switch .........................................................................40
Combination Gas Valve....................................................................40
Ignition Control Module ....................................................................40
Door Safe Switch (Model VZH) ..............................................................40
OPERATION .............................................................................41
Pre-Startup Checklist .....................................................................41
Startup.................................................................................42
Sequence of Operation ....................................................................42
Post-Startup Checklist.....................................................................42
Shutdown ..............................................................................42