Pentair MASTERTEMP 125 Installation And User Manual

Rev. B 8/14 MASTERTEMP
®
125 Pool and Spa Heater Installation and User’s Guide
31
Section 3. Installation Instructions
HEATER ELECTRICAL SCHEMATIC LADDER DIAGRAM
L1 L2
120/240
VAC
120/240
VA
C
IGNITER
L1
S1 S2 L2
F1
F2 BLOWER
GND
GND
CLASS II
TRANSFORMER
24 VAC
24 VAC
24V
OPERATING
CONTROL
24 VAC
LOGIC
TH
IND
AIR
FLOW
SWITCH
HI
LIMIT
SWITCH
WATER
PRESSURE
SWITCH
COM NO
AGS
SWITCH
VAL
GAS VALVE
THERMISTOR
SENSOR
STACK FLUE
SENSOR
NOTES:
1.)
AND TH
L1 L2 F1 F2 S1 24 VAC
S2 GND IND VAL
ARE CONNECTED ON THE IGNITION MODULE.
2. )
3. )
PIN AND SOCKET CONNECTOR.
IF ANY OF THE ORIGINAL WIRES AS SUPPLIED
WITH THE APPLIANCE MUST BE REPLACED,
THEY MUST BE REPLACED WITH TYPE 105˚ C
OR ITS EQUIVALENT.
LADDER DIAGRAM
Figure 25.

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