Connection Example For A System With Electrical Back-Up - DeDietrich AWHP-2 MIT-IN-2 iSystem Installation And Service Manual

AWHP-2 MIT-IN-2 iSystem
B TS +
1 2
4 5 6
14
BUS
12
25/06/2014 - 7616371-001-04
SCU
0-10V S AMB C
+ - 4 3 2 1 2 1
B A
S SYST + TA - S ECS S EXT S DEP C
2 1 2 1 2 1 2 1
8
11 7 3 3
4.11.13. Connection example for a system with
electrical back-up
PCU
S AMB B S AMB A
2 1 2 1
S DEP B
2 1 2 1
4
10
13
A/B
A
B
Not used: Do not connect anything to the terminal block.
A
Z
CAUTION
Do not connect anything to the DHW pump
outlet as the reversal valve is connected to the
PCU PCB in the boiler.
Connect the outside temperature sensor.
E
Connect the 3-way valve motor (circuit B) and the circuit
R
B flow sensor.
Connect the heating pump (Circuit B).
T
Connect a safety thermostat if the heating circuit is for
Y
underfloor heating: Remove the bridge. Connect the wires
from the safety thermostat to the connector.
Connect the DHW sensor.
U
4. Installation
9
M003034-B
57