MasterTemp Pool and Spa Heater P/N 474131 Rev. M 8/2020
8
Contents
Product HIN / Code Requirements / Safety Warning .............................................................................................. 2-10
Safety Warnings ...................................................................................................................... 3
Important Notices / Warranty Information ............................................................................................................................................. 3
Code Requirements .............................................................................................................................................................................. 4
Consumer Information and Safety Information ..................................................................................................................................... 5
General Specifications .......................................................................................................................................................................... 6
Section 1. Installation .............................................................................................................. 10
Heater Description ................................................................................................................................................................................ 10
Sequence of Operation ......................................................................................................................................................................... 10
Putting the Heater into Service ............................................................................................................................................................. 10
Specifications ....................................................................................................................................................................................... 11
Plumbing Connections .......................................................................................................................................................................... 12
Valves ................................................................................................................................................................................................... 12
Manual By-Pass ................................................................................................................................................................................... 12
Automatic By-Pass ............................................................................................................................................................................... 13
Below Pool Installation ......................................................................................................................................................................... 13
Water Connections ............................................................................................................................................................................... 14
Multiple Heater Installation ................................................................................................................................................................... 15
Gas Connections .................................................................................................................................................................................. 16
Gas Pipe Sizing .................................................................................................................................................................................... 16
Sediment Trap/Drip Leg ...................................................................................................................................................................... 16
Gas Pipe Escutcheon Installation ........................................................................................................................................................ 17
Testing Gas Leaks and Gas Pressure ................................................................................................................................................ 18
Inlet Gas Pressure Requirements ...................................................................................................................................................... 19
Outdoor Installation / Heater Clearances ............................................................................................................................................. 19 - 20
Indoor Venting—General Requirements Heater Clearances / Indoor Installation . Outdoor Shelder ................................................... 22
Vent Installation (Indoor Installation or Outdoor Shelter) - Vertical Venting .................................................................................... 19-25
Horizontal Venting - Using Single-Wall Stainless Gas Vent ........................................................................................................... 26-27
Connecting Single-Wall Stainless Steel Vent to the Heater ............................................................................................................. 28
Horizontal or Vertical Venting Flexible Duct (Flex-Vent) ................................................................................................................. 29
Combustion Air Supply / Corrosive Vapors and Possible Causes ....................................................................................................... 30
Direct Air Intake Duct with 3-inch PVC Pipe (Indoor Installation) ......................................................................................................... 31
Control Panel Indexing ......................................................................................................................................................................... 31
Final Installation Check ........................................................................................................................................................................ 31
Electrical Connections .......................................................................................................................................................................... 32
Heater Bonding ..................................................................................................................................................................................... 33
Remote Control Connections (Fireman’s Switch Connection) ............................................................................................................. 34
Connecting the MasterTemp Heater to the IntelliCenter Control System Load Center via RS-485 ..................................................... 35-37
MasterTemp Heater Wiring Diagram .................................................................................................................................................... 38
MasterTemp Heater Electrical Schematic Ladder Diagram ................................................................................................................. 39
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