To Switch Off Gas To The Appliance; Operating Control - Pentair Pool Products MASTERTEMP 250K BTU/HR Installation And User Manual

8. Push the toggle switch away from you to switch the
gas on.
9. Replace the Door Access Panels. All panels must be
in place when operating the heater.
10. Set 3-way valves on inlet and outlet to pool or spa,
as appropriate.
11. Turn on all electric power to the appliance.
12. Press either the POOL ON or SPA ON button switch
on the operating control.
You are
here
FIGURE 5: Turning Gas Control ON
13. Set the thermostat to desired setting (NOTICE: Set
point must be above actual water temperature or
burner will not fire). See "OPERATING CONTROL."
14. The blower should come on immediately, and after
about 20 seconds, the burner should fire. When
operating for the first time, the burner may not fire
on the first try because of air in the gas line. If it
does not fire at first, push the OFF switch, wait five
minutes, and again push the POOL or SPA ON switch.
The burner should fire after about 20 seconds. You
may have to repeat this until all of the air has cleared
the gas line.
15. The burner should fire until the pool/spa temperature
reaches the desired temperature set on the thermo-
stat. The blower will continue to run for about 45
seconds after the burner shuts off. If any of the
safety interlocks should open during burner opera-
tion, the burner shuts off immediately, but the blower
continues to run for about 45 seconds.
Should overheating occur or the gas supply fail to
shut off, turn off the manual gas control valve to the
appliance.
16. If the appliance will not operate, follow the instruc-
tions "TO SWITCH OFF GAS TO THE APPLIANCE",
and call your service technician or gas supplier.

TO SWITCH OFF GAS TO THE APPLIANCE

1. Press the OFF button on operating control.
2. Switch off all electric power to the unit.
3. Remove the access door panels.
See Figure 3, page 5.
HEATER PARTS MAY BE HOT.
WARNING
4. Toggle-Style Valve: Pull toggle toward you to turn gas
5. Replace the Access Door Panels.

OPERATING CONTROL

The five operating switches are:
POOL ON Press this button to govern heater operation
by the pool temperature setting.
SPA ON Press this button to govern heater operation by
the spa temperature setting.
Gas control is shown
HEATER OFF Press this button to switch off the heater.
OFF. Push toggle
▲ ▲
switch away from you
setting.
to switch ON.
▼ ▼
setting.
To toggle the display between degrees Centigrade (°C)
and degrees Fahrenheit (°F):
1. Turn the Operating Control OFF.
2. Press
FIGURE 6: Operating Control for all models.
When either the
depressed, the digital display will indicate the tempera-
ture setting. After five seconds, the display will return to
the actual pool/spa temperature.
In addition to the digital temperature display, there are
five indicator lights:
The POOL ON light indicates that the pool water tem-
perature is governing operation of the heater.
The SPA ON light indicates that the spa water tempera-
ture is governing operation of the heater.
The HEATING light comes on and stays on when the
burner is firing. This light should be on whenever the
burner is on. It 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.
6
off.
TEMP Press this button to raise the temperature
TEMP Press this button to lower the temperature
▲ ▲ ▼ ▼
TEMP or TEMP for 5 seconds. The dis-
play will flash once and change modes (°C to °F or
vice versa).
Temperature
Up and Down
System Operation
Indicator Lights
▲ ▲
TEMP or
Digital Temperature
Display
Dual Temperature
Heater OFF
Controls
Switch
▼ ▼
TEMP buttons are