20
SunTouch
®
Control System Installation and User’s Guide
Right button:
Select the
Heat Start Temperature Differential
setting.
Up/Down button:
Adjust the temperature differential to start heating from 3° to 9°.
For example, if “Heat Start Temp” is set to 3°, this ensures that the temperature has
to deviate by 3° at least to the specified set point temperature (in the Heat menu, on
page 18) before it switches on. Once the solar system is on it will start converging as
it is heating. This ensures that it will not continually be switching on and off.
Right button:
Select the
Heat Stop Temperature Deferential
setting.
Up/Down button:
Set the temperature differential to stop heating from 2° to 5°. This
setting sets how close to the target set point temperature to switch off solar heat.
Right button:
Select to the “Enable Heat Pump” setting.
Up/Down button:
Select
Yes
to enable solar as a heat pump. Select
Yes
if a heat
pump is being used in place of a solar heating system. If Solar is set to heat pump,
Valve C
is free to be used by other circuits (see page 26). Select
No
to disable heat
pump.
Right button:
Select the
Cooling Enable
setting. See “Nocturnal Cooling” below
for more information.
Up/Down button:
Select
Yes
to enable heat pump cooling (used for nocturnal
cooling). Select
No
to disable nocturnal cooling.
Right button:
Select the
Cool Start Temperature Differential
setting.
Up/Down button:
Adjust the cooling temperature differential to start cooling
from 3° to 9°. For example, if Cool Start Temp is set to 3°, this ensures that the
temperature has to deviate by 3° at least to the specified set point temperature (in the
Heat menu, on page 18) before it switches on.
Right button:
Select the
Cool Stop Temperature Deferential
setting.
Up/Down button:
Set the cool temperature differential to stop from 2° to 5°. This
setting sets how close to the target cooling set point temperature to switch off.
Left button:
Press the Left button to return to the main status screen.
NOCTURNAL COOLING:
The transfer of solar heat to water occurs during the day when the BTU’s
(heat) is harvested from the solar collector, then hot water is transferred into the swimming pool. When the
pool water goes through the collector at night, in some climates as long as the night time air is cooler than
the swimming pool water, the water will cool off. This transfer of heat to the night air to cool the water is
referred to a “nocturnal cooling” or occurring during the night hours. This process is opposite to what occurs
during the day time hours to generate heat from the sun. The solar collector is similar to a car radiator, in that
cool air on the surface of the solar collector is used to cool the water off.
Heat Stop Temp
Temp Diff: 3
Enable
Heat Pump: Yes
Heat Start Temp
Temp Diff: 6
Cool Stop Temp
Temp Diff: 3
Cool Start Temp
Temp Diff: 6
Cooling
Enabled: Yes
Solar Freeze protection:
Use this feature to enable freeze protection for the solar equipment.
Menu button:
The Solar Status setting is displayed.
Right button:
Press the button until the Solar Freeze setting is displayed.
Up/Down button:
Select
Yes
to enable solar freeze protection or
No
to disable freeze
protection. If
Yes
is selected, the circuit will switch on if the air temperature drops to
36° F (2° C). This feature is used to protect the system plumbing from being damaged
during freezing conditions.
Note: When freezing conditions are detected by the air
sensor, the filter pump will be switched on and water will circulate continuously
through the system.
Left button:
Press the Left button to return to the main status screen.
Solar Menu (6/14)
(Continued)
Solar Freeze
Enabled: Yes
