LAARS U.H.E. - Service Manual - Manual (Page 2)

LAARS Heating Systems Page 2
Table of Contents
2
Page U.H.E. TM
Service Procedure
Introduction 3 - - -
How to use this manual 4 - - -
Tool required for service 4 - - -
Specifications 5 - - -
Sequence of Operation 8 - - -
Troubleshooting 10 - - -
Thermostat Circuit, Testing & Replacement 12 I
Combustion System Testing and Replacement 18 II
Burner Tube Inspection & Replacement 22 III
Gas Valve Replacement 24 IV
Blower Testing and Replacement 25 V
Exhaust Pressure Switch Testing and Replacement 27 VI
Hot Surface Igniter Testing and Replacement 30 VII
Flame Sensor Testing and Replacement 32 VIII
Ignition Module/Control Board Replacement 34 IX
Transformer Replacement 35 X
Vent Safety Switch Testing and Replacement 36 XI
Anode & Flue Baffle Inspection and Replacement 38 XII
Installation Check List 43 - - -
Heater Service Report 44 - - -
Parts List 45 - - -
Glossary of Terms 48 - - -
U.H.E. Series Commercial Gas
Ultra High Efficiency Water Heaters