8
SunTouch
®
Control System Installation and User’s Guide
Solar Only Menus
(Continued)
Heat Start and Stop Temp Differentials:
Use this feature to adjust the start and stop
temperature deferential settings to start and stop solar water heating.
Solar Freeze protection:
Use this feature to enable freeze protection for the solar equipment.
Menu button:
The Set Water Temp 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.
Cleaner Freeze protection:
Use this feature to enable freeze protection for cleaner equipment.
Menu button:
The Set Water Temp setting is displayed.
Right button:
Press the button until the Cleaner Freeze setting is displayed.
Up/Down button:
Select
Yes
to enable cleaner 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 cleaner equipment 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.
Menu button:
The Set Water Temp setting is displayed.
Right button:
Press the button until the Air Sensor is displayed.
Up/Down buttons:
Select
Yes
to enable the sensor. Select
No
to disable the
sensor (and not display the air temperature on the main status screen).
Left button:
Press the Left button to return to the main status screen.
Heat Start Temp
Temp Diff: 6°
Solar Freeze
Enabled: Yes
Cleaner Freeze
Enabled: Yes
Heat Stop Temp
Temp Diff: 3°
Air Sensor
Enabled: Yes
Note: Air Sensor (freeze protection requirement): Freeze protection for solar systems (“Solar Only” mode) requires
an optional ambient air temperature sensor and relay for the filter pump and or cleaner pump override. See page 81
for Time clock pump override information. The air sensor must be enabled to display the current air temperature on
the main status screen. The optional air temperature sensor is used to protect the system plumbing and equipment
against freeze damage. For information about freeze protection for circuits, valves and auxiliaries, see page 9. To
enable or disable the air sensor:
Note: The solar roof sensor must be 6° higher than the water temperature. The pump must be ON for a few minutes
for operation. When the roof sensor and the water temperature are within 3°, solar heat will switch off. This
differential setting is adjustable in the “Stop Temp Diff” setting. Adjusting the differential will effect the performance
of your solar system. See you solar professional for the optimum setting.
Press Menu button
the Solar Status setting is displayed. Press
Right button
until the “Start
Temperature Deferential” setting is displayed. Press
Up/Down button
to adjust “Heat Start
Temp” differential setting (default setting 6°). Press
Right button
to move to the “Heat
Stop Temp” setting. Press
Up/Down button
to adjust “Heat Stop Temp” differential setting
(default is 3°). This setting sets how close to the target set point temperature to switch off
solar heat. Press
Left button
to return to the main status screen.
Cool Start Temp
Temp Diff: 6°
Cool Stop Tempf
Temp Diff: 3°
Cooling (Enabled) and Start and Stop Temp Differentials:
When “Cooling” is enabled, water will circulate through the
system to lower the temperature during the night hours. Adjust
the “Cool Start and Stop Temp differential temperatures settings.
