15
1.7.1. Cooling:
This option is for the protection of the collector fluid. It activates the solar pump (
P1
or
P2)
if
the temperature on the collector arrays (
T1
or
T4)
exceeds the collector
Max temp
value
even if the set maximum temperature in the tank is exceeded. The circulation stops when
temperature has dropped 20°F.
(The pumps will be stopped if the water temperature in the tank reaches 203°F).
x
When
Yes
is selected on the
Cooling
function, the
Recooling
function becomes
accessible.
1.7.1.1.
Recooling
(Night-time)
When
Recooling
is set to YES, the following safeguards are in place:
When the water temperature inside the tank is above
Maxtemp tank1
(refer to section
2.1) and the collector temperature is 20°F lower than the actual tank temperature (
T2
),
the pumps will activate to cool the tank through the collector array (typically at night).
The pumps will run until either
x
the temperature of the tank drops below the
Maxtemp tank1
setting, or,
x
the temperature difference between the tank and the collector array is less than 4°F.
1.7.2. Overheat protection
(should only be used in conjunction with Cooling function
):
When set to
YES
, this function will stop all collector circulation (
P1
and
P2
) when the collector
temperature registers more than 20°F above the collector
Maxtemp
setting. This function is
intended to protect any temperature sensitive system components (Tank, lines, pumps...) in
the event of the failure of, for example, tank sensor
T2.
1.7.3. Freeze protection:
When set to
YES
, this option will keep the solar panel temperature (
T1
or
T4)
above the
Freeze
Protection Temperature
setting level (see below) by activating the pump (
P1
or
P2)
.
x
This option could be used to reduce snow accumulation on the panel for increased
efficiency during the day or to avoid potential damage due to freezing.
Note
: This function uses energy from the storage tanks and may result in reduced available
thermal capacity.
¤¤
Protection func.
-----------
Collector
Max temp
248°F
£
Cooling
yes
-
----
Recooling
no
Overheat prot.
no
Freeze prot
no
¤¤
Protection func.
------- --
Collector
Max temp
248°F
Cooling
yes
Recooling
yes
Overheat prot.
no
£
Freeze prot
yes
----
-
Freeze prot temp
38°F
x
Adjust the
Freeze prot temp
setting to the desired
temperature.
x
(Adjustable from -4°F to + 45°F
with factory default of 37°F)
Summary of Contents for ADVANCED SOLAR CONTROLLER
Page 1: ...ADVANCED SOLAR CONTROLLER...
Page 41: ...41 Controller Schematic Appendix C...
Page 42: ...42 Appendix D...
