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TABLE OF CONTENTS
A. Heater Maintenance Checklist
A.1
Periodic
(before and as required during heating season)
A.2
Annual
(before heating season)
B. Important Notices
C. Installation
C.1
Description ........................................................................................................................................ 5
C.2
Location of Heaters .................................................................................................................... 5
C.3
Noise Levels ..................................................................................................................................... 5
C.4
Mounting ........................................................................................................................................... 5
C.5
Clearances for Maintenance ................................................................................................ 6
C.6
Piping Applications .................................................................................................................... 6
C.7
Wiring Schematics ...................................................................................................................... 7
D. Dimensions & Specifications
E. Repair & Replacement Procedures
E.1
Cores..................................................................................................................................................... 10
E.2
Removal of Fan, Fan Guard, or Motor........................................................................... 10
E.3
FR/HP 36 Fan Guard ................................................................................................................. 10
E.4
V-Belt Service: Removal, Installation, & Tensioning ........................................... 10
E.5
Fan Motor: Removal & Installation ................................................................................. 10
E.6
Drive Sheaves: Removal & Installation ........................................................................ 10
E.7
Drive Frame: Removal ............................................................................................................. 10
E.8
Fan Shaft Bearings: Removal & Installation ............................................................ 10
E.9
Fan: Removal & Installation ...................................................................................................11
F. Parts List
F.1
FR/HP 12, 16, 20, 24, and 30 Models ..................................................................................12
F.2
XS40 Disconnect .........................................................................................................................13
F.3
FR/HP 36 Models......................................................................................................................... 14
G. Model Coding
Ruffneck™ is a key brand of Thermon.
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