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PUMP STATION CONTROL INSTRUCTIONS
CONTROL INSTRUCTIONS
Prior to operation of the control on the solar pump station
the collector and tank temperature sensors must be prop-
erly connected. Remove the control cover and connect
the sensors to the proper terminals.
DISPLAY
COVER
CABLE CONDUITS
WITH STRAIN RELIEF
Figure 29.
Figure 30.
The temperature sensors should be connected to the
following terminals with no dependence on polarity:
1 / 2 = sensor 1 (collector outlet)
3 / 4 = sensor 2 (lower heat exchanger sensor - pre-installed)
5 / 6 = sensor 3 (tank sensor)
7 / 8 = sensor 4 (upper heat exchanger sensor - pre-installed)
WARNING
ESD SENSITIVE
Electrostatic discharge can lead to
damage of electronic components.
PUSHBUTTONS
CAN FUSE 4A
FUSE
9/10 = VBus (see VBus note)
The power supply is connected to the following terminals:
19 = Neutral - N
20 = Line power - L
12 = Ground
The control is equipped with two relays, one for the solar
loop pump (upper - primary) and one for the water loop
pump (lower - secondary)
• Relay 1 (primary pump)
18 = Line power - R1
17 = Neutral - N
13 = Ground
• Relay 2 (secondary pump)
16 = Line power - R2
15 = Neutral - N
14 = Ground
The controller is equipped with a VBus® for data transfer
with an energy supply to external modules (not included).
The connection is carried out at the terminals marked "VBus"
and is not polarity dependent.
SYSTEM DESCRIPTION
The DeltaSol® BS Solex US controller is used in solar thermal
systems with an external heat exchanger which separates
the solar loop from the domestic hot water loop.
The controller calculates the temperature difference between
the collector sensor S1 and the tank temperature sensor
S3. If this temperature difference reaches the switch-on
temperature difference, the primary loop pump is switched
on. If the temperature difference falls below the switch-off
difference the pump is switched off.
If the switch-on temperature difference between the upper
heat exchanger sensor S4 and the tank temperature sensor
S3 is reached, the secondary loop pump will be switched on.
26
Figure 31.
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