Resol DeltaSol MX Manual For The Specialised Craftsman Download

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one of the following conditions has been detected for at least 1 min during the
period between 11 p.m. and 5 a.m.:
• collector temperature exceeds 40 °C
• the temperature difference exceeds

TOn

The delay time of 1 min ensures that the message is not triggered by short-term
fault conditions.
Possible causes are:
•  defective non-return valves
•  defective valve
•  wrongly adjusted time
Flow and return interchanged
This function is used for detecting an interchange of the fl ow and return pipe or a bad-
ly placed collector sensor. For this purpose, the collector temperature is monitored
for plausibility during the switch-on phases of the solar pump. The message FL / RE
interch. appears, when the plausibility criteria have not been met 5 times in a row.

Note
The !FL/RE interch. error can only be correctly detected and indicated,
if the collector sensor measures the temperature directly in the fl uid at
the collector outlet. If the collector sensor is not correctly placed, a false
message may occur.

Place the collector sensor directly in the fl uid at the collector outlet
or deactivate the FL/RE interch. function control.

Maximum store temperature
This function is used for detecting and indicating if the adjusted maximum store
temperature has been exceeded. The controller compares the current store tem-
perature to the adjusted maximum store temperature, thus monitoring the store
loading circuits.
The maximum store temperature is considered exceeded when the temperature
measured at the store sensor exceeds the adjusted maximum store temperature by
at least 5 K. The monitoring becomes active again as soon as the store temperature
falls below the adjusted maximum store temperature.
In the Store channel, the store or stores to be monitored can be selected.
A possible cause for an unwanted exceedance of the maximum store temperature
is a defective valve.

8.4

Holiday function

Solar / Holiday function

Adjustment
channel

Description

Adjustment range / se-
lection

Factory setting

Cooling

Cooling logic variant

Col. cool., Syst. cool., Off

Off

TColmax.

Collector maximum tem-
perature

70 … 190 °C

100 °C

Store (1 … 5)

Store succession order

system dependent

system depend-
ent

St. cooling

Store cooling option

Yes, No

Yes

TOn

Switch-on temperature
difference

1.0 … 30.0 K

20.0 K

TOff

Switch-off temperature
difference

0.5 … 29.5 K

15.0 K

Stmax (1…5)

Store cooling temperature

4 … 95 °C

40 °C

Heat dump

Store heat dump

Yes, No

Output

Output selection

system dependent

Sensor

Sensor selection

system dependent

TStoreOn

Switch-on temperature

5 … 95 °C

65 °C

TStoreOff

Switch-off temperature

4 … 94 °C

45 °C

The holiday function is used for operating the system when no water consumption
is expected, e. g. during a holiday absence. This function cools down the system in
order to reduce the thermal load.
Only if the holiday function has been activated with the parameter Days of ab-
sence will the adjustments described in the following become active.
2 cooling functions are available: System cooling, collector cooling

System cooling type
If the switch-on temperature difference is exceeded, the stores continue to be
loaded even if their corresponding maximum temperature is reached, but only up to
the emergency shutdown temperature. Store loading continues until all stores have