Resol DeltaSol AL E Manuel page 29

∆T - regulation
DT O:
Switch-on temperature
difference
Adjustment range:
1.0 ... 50.0 K
4.0 K; 90.0 [°Ra]
Factory setting:
6.0 K; 12.0 [°Ra]
DT F:
Switch-off temperature
difference
Adjustment range:
0.5 ... 49.5 K
1.0 ... 89.0 [°Ra]
Factory setting:
4.0 K; 8.0 [°Ra]
Note:
The switch-on temperature difference must
be at least 0.5K (1 °Ra) higher than the
switch-off temperature difference.
If the switch-on difference (DTO) is reached, the
pump (R1) is activated. If the temperature difference
falls below the adjusted switch-off temperature diffe-
rence (DT F) the controller switches off the pump.
Maximum store temperature
SMAX:
Maximum store tempe-
rature
Adjustment range:
4...95 °C
40 ... 200 [°F]
Factory setting:
60 °C; 140 [°F]
hysteresis:2 K [4 °Ra]
Note:
The controller is also equipped with a non-
adjustable emergency shutdown if the store
reaches 95 °C (200 °F).
Once the adjusted maximum temperature is excee-
ded, the solar pump is switched off and further loading
of the store is prevented to reduce scald risk or sys-
tem damage. The symbol is shown on the display
if the store temperature exceeds the maximum value.
S2 is used as the reference sensor.
Collector temperature limitation for emer-
gency shutdown
CEM:
Collector temperature
limitation
Adjustment range:
80...200 °C
170 ... 390 [°F]
Factory setting:
130 °C; 270 [°F]
hysteresis: 10 K; 20 [°Ra]
If the adjusted collector emergency shutdown tempe-
rature (CEM) is exceeded, the controller switches off
the solar pump in order to protect the system against
overheating.
The factory setting is 130°C (270 °F) but it can be
changed within the adjustment range of 80...200°C
(170 ... 390 °F). (flashing) is shown if the collector
emergency shutdown temperature is exceeded.
Collector cooling
OCCO:
Option collector cooling
Selection: OFF/ON
Factory setting: OFF
CMAX:
Collector maximum
temperature
Adjustment range:
70 ... 160 °C
150 ... 320 [°F]
Factory setting:
110 °C; 230 [°F]
hysteresis: 5 K; 10 [°Ra]
This function protects the collector against over-
heating.
When the adjusted maximum store temperature is
reached, the solar pump is switched off. As soon as
the collector temperature reaches the adjusted ma-
ximum collector temperature (CMAX) the solar
pump is activated until the collector temperature is 5
K (10 °Ra) lower than the maximum temperature. The
store temperature may increase, but only up to 95 °C
(200 °F) (emergency shutdown of the store).
Option collector minimum limitation
OCMN:
Minimum collector
limitation
Selection: OFF/ON
Factory setting: OFF
CMIN:
Minimum collector tem-
perature
Adjustment range:
10...90 °C
50 ... 190 [°F]
Factory setting:
10 °C; 50 [°F]
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