TDMA CONTROL 602-702 Eng Nov.doc
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5.4.3
East-West-Control with two pumps
The ‘East-West with two pumps’ is for systems with two collector panals (fields),
which have different orientation. For example, one facing East and another
facing West. This function controls two separate solar pumps. Here, the
sensor F2 (store bottom sensor) is used to control both solar pumps, as a
reference sensor. If this function is activated, it automatically changes the
‘stratification functon’ to Off. When the solar yield function has been selected,
the controller starts to count when either of the two pumps run..
East-West with two Pumps: allocation input - Function - output
Input
Function
Collector sensor Field 1 (F1)
Activation conditions for solar
pump control 1 (Temperature
difference)
Collector sensor Field 2
CONTROL 602 Variant A (F8)
CONTROL 602 Variant B (F9)
CONTROL 702 (F11)
Activation conditions for solar
pump control 2 (Temperature
difference)
Store top sensor (F3)
Max. Permissible store
temperature (90°C)
Store bottom sensor (F2)
Differential Solar
Output:
Solar pump Field 1 (output A1)
Solar pump Field 2 (CONTROL 602 Output A3 in Variant A and Ouput A4 in
Variant B; CONTROL 702 Output A2)
5.4.4
Cooling, Swimming Pool and two store control
This function is to prevent overheating of the collector or put heat to a second
store (or pool). The solar pump will continue during the cooling of the store as
long as the maximum collector or store temperature is not exceeded.
Select Function Cooling:
If the ‘store top sensor’ has reached the set ‘cooling temperature’, the output
‘cooling’ state is operated. This output can drive for example; a charging
pump to cool the store or redirect the heat to another store.
Cooling Temperature:
30...90 °C
Here the desired cooling temperature can be set.
Hysteresis:
2...10 K
The hysteresis of cooling control can be set.
For example, with a cooling temperature of 85 °C and a Hysteresis of 5 K, the
output is activated at 85 °C and deactivated at 80 °C.
Seclect Function - Cooling via Heating Circuit:
When the store temperature is above a set value, the store can be cooled by
using heating circuit 1. The mixing valve and pump of heating circuit 1 is
operational.
The cooling temperature and hysteresis settings are described below.
