Pentair MASTERTEMP 125 Installation And User Manual

MASTERTEMP
®
125 Pool and Spa Heater Installation and User’s Guide Rev. B 8/14
12
PLUMBING CONNECTIONS
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CAUTION
Before operating the heater on a new installation, turn on
the circulation pump and bleed all the air from the filter
using the air relief valve on top of the filter. Water should
flow freely through the heater. Do not operate the heater
unless water in the pool/spa is at the proper level. If a
manual by-pass is installed, temporarily close it to insure
that all air is purged from the heater.
WATER CONNECTIONS
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Pool
Main
Drain
Spa
From Pool
3-Way
Valve
3-Way
Valve
3-Way
Valve
Chlorinator
Heater
Pump
Check Valve
Filter
Figure 4.
Section 3. Installation Instructions
PUMP
FILTER
HEATER
MANUAL
BY-PASS
TO
POOL
GATE
VALVE
FROM
POOL
FROM
FILTER
Figure 3.

Pentair MASTERTEMP 125 Specifications

General

BTU Output	125, 000 BTU/hr
Fuel Type	Natural Gas or Propane
Ignition System	Electronic
Minimum Flow Rate	20 GPM
Maximum Working Pressure	50 PSI
Efficiency	82%
Water Connections	1.5 inch
Certifications	ANSI Z21.56
Voltage	120V