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SCU224
CMN / CMN1 / CMN2:
col. minimum temperature
Adjustment range 50 ... 195°F
Factory setting 50°F
CMX / CMX1 / CMX2:
collector maximum temperature
Adjustment range 210 ... 380°F
Factory setting 250°F
4.1.12 System cooling
If the adjusted maximum tank temperature is reached, the
solar system switches-off. If now the collector temperature
rises to the adjusted maximum collector temperature
(CMX / CMX1 / CMX2), the solar pump remains activa-
ted until this temperature limitation value is again underrun.
The tank temperature might continue to rise (subordinated
active maximum tank temperature), but only up to 203°F
(emergency shutdown of the tank). If the tank temperature
is higher than the maximum tank temperature (S MX /
S1MX / S2MX) and the collector temperature is by at
least 10°RA lower than the tank temperature, the solar
pump is activated until the tank is cooled down again by
the collector and the tubes below the adjusted maximum
temperature (S MX / S1MX / S2MX)(only by activated
OREC function).
In case of an activated system
is shown on the display
(blinking). Due to the cooling function, the solar system can
be kept operable for a longer period on hot summer days
and a thermal release of the collector and the heat transfer
medium is ensured as well.
OCX / OCX1 / OCX2:
Option System cooling
Adjustment range OFF ... ON
Factory setting ON
4.1.13 Option collector minimum limitation
OCN / OCN1 / OCN2:
collector minimum limitation
OFF / ON
Factory setting OFF
The minimum collector temperature is a minimum switching
temperature which must be exceeded so that the solar
pump (R1/R2) is switched-on. The minimum temperature
shall avoid a steady starting-up of the solar pump (or solid
fuel boiler charging pumps) for low collector temperatures.
If the minimum temperature is underrun,
is shown on
the display (blinking).
CFR / CFR1 / CFR2:
antifreeze temperature
Adjustment range 15 ... 50°F
Factory setting 40°F
4.1.14 Option antifreeze
OCF / OCF1 / OCF2:
antifreeze function
Adjustment range OFF / ON
Factory setting OFF
4.1.11 Collector temperature limitation
Emergency shut down of the collector
If the adjusted collector limit temperature (EM / EM1 /
EM2) is exceeded the solar pump (R1/R2) is deactivated
in order to avoid a damaging overheating of the solar
components (collector emergency shutdown). The factory
setting for the temperature limitation is 285°F - it can be
changed within the adjustment range of 230 ... 400°F. Symbol
is shown on the display (blinking).
EM / EM1 / EM2:
temperature limitation corector
Adjustment range 230 ... 400°F
Factory setting 285°F
The antifreeze function activates the loading circuit between
collector and tank if the adjusted antifreeze function is un-
derrun in order to protect the medium against freezing or
„thickening“. If the adjusted frost protection temperature is
exceeded by 2°F, the loading circuit will be deactivated.
Please note:
As there is only a limited quantity of heat available in the
tank for this function, the antifreeze function should only
be used in regions with few days of temperatures around
freezing point.
(52 páginas)
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