(Refer to wiring schematic on inside of access panel.)
E. BASIC HEAT PUMP OPERATION
D. ELECTRICAL CONNECTIONS
1. ON/OFF
TOGGLE
SWITCH
In the OFF (O) position, the heater will be prevented from operating; however, there
is power to the unit. With the switch in the ON (I) position, the unit will run anytime
the water temperature drops below the thermostat setting and the pool or spa pump is
circulating.
NOTE:
If the thermostat is turned all the way down and the ON/OFF switch is in the ON
position, the heater will run anytime water temperatures drop below 60° F. You must
position the toggle switch in the middle (OFF) position to keep the unit from operat-
ing when water temperatures fall below 60° and heating is not desired.
2. STANDBY LIGHT ON:
This indicates that there is power to the unit. The heat pump will turn on if the the
toggle on/off switch is on, the thermostat calls for heat and there is proper water
fl
ow
to the heater.
3. STANDBY LIGHT OFF:
This indicates power is not getting to the unit. Check any disconnect switches or
circuit breakers.
E. CONTROL PANEL INFORMATION
0//,
4%-0
&
#
&
#
&
#
&
#
0//,
/&&
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0//,
4(%2-/34!4
0//,/&&30!
3%,%#4/2
37)4#(
30!
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,)'(4
AT500
CONTROL
PANEL
6.
