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Contents
Safety Warnings ......................................................................................................................
Code Requirements ..............................................................................................................................................................................
General Specifications ..........................................................................................................................................................................
Section 1. Installation ..............................................................................................................
Heater Description ................................................................................................................................................................................
Sequence of Operation .........................................................................................................................................................................
Putting the Heater into Service .............................................................................................................................................................
Specifications .......................................................................................................................................................................................
Plumbing Connections ..........................................................................................................................................................................
Valves ...................................................................................................................................................................................................
Manual By-Pass ...................................................................................................................................................................................
Automatic By-Pass ...............................................................................................................................................................................
Below Pool Installation .........................................................................................................................................................................
Water Connections ...............................................................................................................................................................................
Multiple Heater Installation ...................................................................................................................................................................
Gas Connections ..................................................................................................................................................................................
Gas Pipe Sizing ....................................................................................................................................................................................
Sediment Trap/Drip Leg ......................................................................................................................................................................
Gas Pipe Escutcheon Installation ........................................................................................................................................................
Testing Gas Leaks and Gas Pressure ................................................................................................................................................
Inlet Gas Pressure Requirements ......................................................................................................................................................
Control Panel Indexing .........................................................................................................................................................................
Final Installation Check ........................................................................................................................................................................
Electrical Connections ..........................................................................................................................................................................
Heater Bonding .....................................................................................................................................................................................
MasterTemp Heater Wiring Diagram ....................................................................................................................................................
MasterTemp Pool and Spa Heater
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P/N 474131 Rev. M 8/2020