Pentair Pool Products MiniMax NT Series Service Manual page 44

Troubleshooting
IGN/120 – 120 volt supply for Hot Surface Igniter (only when supply is 120 volts)
IGN/240 – 120 volt supply for Hot Surface Igniter (only when supply is 240 volts)
L1 – (black wire) Line supply voltage to module (120 volts)
L2 – (white wire) Line supply voltage to module (neutral only if heater supplied by 120 volts)
IGN – (white wire) 120 volt output to Hot Surface Igniter (only when heater firing)
FS – (white wire) 24 volts to flame rectifier (constant). This is a communication wire there will
be signals sent in both directions on this wire (24vac to the sensor 7 Micro amps returning).
TH – (white wire) 24 volts from Low Pressure Switch (fan)
VAL – (red and blue wires) 24 volts to open gas valve
Only the blue wire is used by the gas valve even though both have been energized.
GND – (white wire) 24 volt ground
P/N NTSM03
BL
IGN/120
Y
IGN/240
BK
L1
W
L2
W
IGN
W
FS
W
TH
VAL
BL
GND
W
IGN MODULE
CONTROL WIRE
TERMINAL DESIGNATION
F1
F2
O
24 VAC
O
IND
Figure 37.
44
Rev. B 2-11-04