4.10.8.
Connecting two circuits and a domestic hot
water tank after the mixing tank
C002293-j
4
6
8
9
11
10
2
7
1
3
5
12
On/off
OT
BL
RL
Tout
Tdhw
TS +
B
A
B
0-10V
S AMB C
4 3 2 1 2 1
+ -
S AMB B
2 1
S AMB A
2 1
S SYST + TA -
S ECS
S EXT
S DEP C
2 1
2 1
2 1
2 1
2 1
S DEP B
2 1
TS +
C
AUX
C
SCU
PCU
A
Do not connect anything to the terminal block.
Z
Connect the outside temperature sensor.
E
Connect a safety thermostat if the heating circuit is for
underfloor heating.
4
Remove the bridge.
4
Connect the wires from the safety thermostat to the
connector.
R
Low loss header
T
Connecting an additional circuit to the AD249 option.
MCA 15 - MCA 25 MCA 25/28 MI
4. Installation
29/04/2010 - 300022146-001-B
39
