State Standard Systems - Manual (Page 29)

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smX:
Maximum tank temperature
Adjustment range:
40 to 205 °F
recommended setting: 160 °f
If the maximum tank temperature is reached the control will
prevent the pump from operating and heating the tank any fur-
ther.
Note: The controller will only allow the tank temperature to ex-
ceed the maximum tank temperature setting when the optional
system cooling function (OCX) is active and the maximum col-
lector temp (CMX) has been exceeded. In this case the pump
will run to transfer heat from the collector to the tank to prevent
prolonged overheating of the collector. In this case the tank
may be heated until it reaches the emergency shutoff point of
190 °F and no further heating will be done.
If the maximum tank temperature setting is exceeded the
symbol will be shown on the display.
em:
Collector temperature limit
Adjustment range:
230 to 400 °F
Recommended setting: 285 °F If the collector temperature limit is reached the solar pump (R1)
is deactivated in order to avoid damaging overheating of the
solar components (collector emergency shutdown).
If the collector temperature limit setting is exceeded the
symbol will be shown flashing on the display.
ocX:
Collector cooling
Adjustment: OFF / ON
recommended setting: on
This function is used to avoid prolonged periods of excessive
collector temperatures. If the maximum tank temperature is
reached, the solar system will shut off. After this point if the
collector temperature reaches the maximum collector tempera-
ture (CMX), the solar pump will activate until the collector tem-
perature drops below the set point. The tank temperature may
continue to rise, overriding the maximum tank temperature, but
only until it reached the emergency tank shutoff point of 190 °F.
When the system is actively cooling the collectors (CMX ex-
ceeded) the symbol will be shown flashing on the display.
cmX:
Maximum collector temp.
Adjustment range:
210 to 380 °F
Recommended setting: 250 °F
Channel only available when
OCX is active
ocn:
Minimum collector limit
Adjustment: OFF / ON
recommended setting: off
The minimum collector temperature is a minimum switching
temperature, which must be exceeded before the solar pump
(R1) is switched on. The minimum temperature will avoid short
cycling of the solar pump at low collector temperatures. If the
collector temperature is lower than the minimum collector tem-
perature set point the symbol will be shown flashing on the
display.
This function is unnecessary if the system backup heating ele-
ment has a set point maintained at 120 °F.
cmn:
Minimum collector temp.
Adjustment range:
50 to 195 °F
Recommended setting: 50 °F
Channel only available when
OCN is active
ocf:
Antifreeze function
Adjustment: OFF / ON
recommended setting: off
This function is used to transfer heat from the storage tank to
the collector in order to avoid freezing of the heat transfer me-
dium is some system types.
This system uses a solution of propylene glycol and water and
is freeze resistant to -30 °F; therefore, this function is not nec-
essary.
cfr:
Antifreeze temperature
Adjustment range:
15 to 50 °F
recommended setting: 40 °f
Channel only available when
OCF is active
Channel only available when OCF is active