Ruffneck™ is a key brand of Thermon Heating Systems Inc.
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TABLE OF CONTENTS
A. Heater Maintenance Checklist 3
A.1 Period ...................................................................................................................3
A.2 Annual ..................................................................................................................3
B. Important Notices 4
C. Installation 4
C.1 Mechanical ........................................................................................................... 4
C.2 Motor Wiring Diagrams ........................................................................................8
C.3 Wiring Diagram for Built-in Disconnect Switch Heaters ........................................ 9
D. Model Coding 10
E. Specifications 11
E.1 General ............................................................................................................... 11
E.2 Model ................................................................................................................. 11
F. Parts List 12
F.1 AH-12A, AH-16A, AH-20A, AH-24A ..................................................................... 12
F.2 AH-24B ............................................................................................................... 13
F.3 XS40 Disconnect ................................................................................................ 14
G. Repair & Replacement 15
G.1 Motor, Fan, and Fan Guard ................................................................................ 15
G.2 Heat Exchanger Removal of Single -Motor Unit Heater ...................................... 16
G.3 Heat Exchanger Removal of Double-Motor Unit Heater ..................................... 16
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