Section 4. Operation Instructions
36
TEMPERATURE SETTING
The heater comes factory set at 78° F. for the pool mode and 100° F. for the spa mode. Using the up and down arrows,
you can set the thermostats to a minimum temperature of 65° F., or a maximum of 104° F. If you desire to heat only one
body of water, the thermostat is capable of an off mode. As an example, if you only wish to heat the spa and not the pool,
simply depress and hold the pool down arrow, and the thermostat will lower its setting to 65° F. then go to an off mode.
MAXIMUM TEMPERATURE SET POINT
1. Unbolt and remove the door panels (see
2. Access the control panel board on the underside of the top cover. Locate the yellow button on the corner of the
control board.
3. Push the Max. Temp. Set Point button on the back of the control board (see
The following sequence should happen:
The unit will come on and the POOL ON light will come on.
A.
B.
Press the ▲ TEMP or ▼ TEMP pad (on TOP of the panel) to set maximum pool temperature.
C.
Wait up to 30 seconds; the POOL ON light will go off and the SPA ON light will come on. To override the
time delay, push the Max. Temp. Set Point button again.
Press the ▲ TEMP or ▼ TEMP button on the control panel and set maximum spa temperature to 104°F
D.
(40°C) or less.
E.
Wait up to 30 seconds; the SPA ON light will go off and the unit will shut down. To override the time delay,
press the Max. Temp. Set Point button again.
4. Reinstall the access door panels.
Door Acess Panel
Figure 33.
MASTERTEMP 125 Pool and Spa Heater Installation and User's Guide
Figure
33).
Top Panel
Door Acess Panel
Figure 34.
Figure
34).
Rev. C 3/2019