Pentair MASTERTEMP 125 User Manual

MASTERTEMP 125 Pool and Spa Heater Installation and User’s Guide P/N 475114 Rev. F 8/2020
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AUTOMATIC BY-PASS
Figure 8 shows a plumbing diagram for an automatic BY-PASS (IntelliValve®). This in conjunction with an IntelliFlo
VSF pump can provide added longevity of the heater and increased cost savings of operation. A 3-Port valve with an
IntelliValve actuator is installed at the heater inlet. A check valve is installed at the heater oulet so that water cannot
ow back into the heater. See instructions for Automatic Bypass valve kit (P/N 462048) for setting the open and closed
position of the IntelliValve.
WARM WATER OUT
CHECK VALVE
INTELLIVALVE
VALVE
COLD WATER IN
HOT WATER
OUT TO POOL
COLD
WATER
IN
Figure 8.
Section 1. Installation

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