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2 | Section 1. Operations
USING THE HEATER'S CONTROL PANEL
The MasterTemp heater controls are as follows:
POOL ON
Press this button to control the heater operation by the pool temperature setting.
SPA ON
Press this button to control the heater operation by the spa temperature setting.
HEATER OFF
Press this button to switch off the heater.
TEMP
Press this button to raise the temperature setting.
TEMP
Press this button to lower the temperature setting.
To toggle the display between degrees Centigrade (°C) and degrees Fahrenheit (°F):
1. Press the HEATER OFF button to switch the heater OFF.
2. Press TEMP or TEMP for five (5) seconds. The display will flash once and change modes (°C to °F or
vice versa).
3. Press the HEATER OFF button to switch the heater ON.
When either the TEMP or TEMP buttons are pressed, the digital display will indicate the temperature setting. After
five seconds, the display will return to the actual pool/spa temperature.
In addition to the digital temperature LED display, there are five indicator LEDs:
The POOL ON light indicates that the pool water temperature is governing operation of the heater.
The SPA ON light indicates that the spa water temperature is governing operation of the heater.
The HEATING light comes on and stays on when the heater's burner chamber is firing. This light should be on whenever
the burner is on. This light blinks when the heater is calling for heat but not firing. If this light is on but the burner fails to
come on, one of the "service" lights should come on, indicating a fault in the system.
The SERVICE SYSTEM light indicates that there is insufficient water flow to the heater. If the pump is operating, this
usually indicates that the filter and/or skimmers should be cleaned (some filters may require back-washing). If the light
remains on after the filter/skimmers have been serviced, the system should be checked by a qualified service technician.
The SERVICE HEATER light indicates a fault in the heater or its controls. If this light comes on, shut down the heater
(See "TO TURN OFF GAS TO THE APPLIANCE" on page 4), and have a qualified service technician check the system.
Risk of explosion or fire causing burns or death if safety interlocks are disabled. DO NOT attempt to operate heater
when SERVICE HEATER light is on or if blower or burner will not start. Instead, follow instructions under "To Switch Off Gas to
the Appliance," and call a qualified service technician to repair unit.
™
MASTERTEMP
Pool and Spa Heater Installation and User's Guide
All manuals and user guides at all-guides.com
Temperature
Up and Down
System Operation
Indicator Lights
WARNING
Digital Temperature
Display
Dual Temperature
Heater "OFF"
Controls
Switch
P/N 475106 Rev. D 1/2016
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