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2
Introduction ............................................................................................................................................................ 3
Certifi cation and Approvals .................................................................................................................................... 3
Tools Required....................................................................................................................................................... 3
Terms, Defi nitions, and Formulas .......................................................................................................................... 4
Safety Precautions ................................................................................................................................................ 5
Installation Check List............................................................................................................................................ 6
Potential Issues ..................................................................................................................................................... 7
Dry Fire Protection / Powered Anode Operation ................................................................................................... 8
Water Piping System ............................................................................................................................................ 9
T&P Valve / Thermal Expansion .......................................................................................................................... 10
General Service / Preventive Maintenance ..........................................................................................................11
Operational Overview .......................................................................................................................................... 12
Operating Your Heat Pump.................................................................................................................................. 13
Control Board Overview ...................................................................................................................................... 14
Control Board Section “A”.................................................................................................................................... 15
Control Board Section “B”.................................................................................................................................... 16
Control Board Section “C” ................................................................................................................................... 17
Control Board Section “D” ................................................................................................................................... 18
Wiring Diagrams ............................................................................................................................................. 19-20
Accessing Maintenance Display .......................................................................................................................... 21
Element Test (Continuity Check) ......................................................................................................................... 22
Element Test (Ohm’s Check) ............................................................................................................................... 23
Heating Element Replacement ............................................................................................................................ 24
Energy Cutout (ECO) Troubleshooting ................................................................................................................ 25
Run Capacitor...................................................................................................................................................... 26
Powered Anode Replacement / Removing the Shroud ....................................................................................... 27
Component Check Flowcharts ....................................................................................................................... 28-31
Temperature Sensors .......................................................................................................................................... 32
Resistance vs. Temperature Charts .................................................................................................................... 33
R-134a Temperature Chart .................................................................................................................................. 34
Cleaning the Evaporator ...................................................................................................................................... 35
Common Service Problems ............................................................................................................................ 36-38
Fault Code Troubleshooting Guide ................................................................................................................. 39-44
Draining and Filling the Water Heater ................................................................................................................. 45
Condensate Pump ............................................................................................................................................... 46
Parts List.............................................................................................................................................................. 47
Table of Contents