DeDietrich MIT-M /E Installation, User And Service Manual page 81

EHC
4
X25
2
X4
X5
X19
14
1 X5: Hydraulic back-up on/off contact, controls the
burner for the back-up boiler
2 X4 : Control of the back-up boiler pump
3 X19: Control signal for the immersion heater, used to
control the immersion heater on the domestic hot
water tank with the EH904 kit
3 X12: 24 V power supply for the condensation sensor,
used to control the immersion heater on the
domestic hot water tank with the EH904 kit
4 X25: Reversal valve from the EH812 reversal valve
kit: A0/domestic hot water circuit
7756241 - v02 - 19062020
CIRC CIRC
A0 B1
AD32 AD32 AD32 AD32 AD324 AD32 AD32 AD32 AD32 AD324 4 4 4 4 4 4 4 AD32 AD32 AD32 AD32 AD32 AD32 AD324 AD324 AD32
10 12
13
9
5
HK150 HK150
HK21 HK21 HK21 HK21
400V~50Hz 400V~50Hz
230V~50Hz 230V~50Hz
EH19 EH19
14
BUS BUS BUS
11
10
3
29
8
4 4 4 4 4 4 4 4 4 4 4 4
6
M M M M
7
A/B A/B A/B
4
B B A A A A A A A A A
M M
EH812 EH812 EH812 EH812
11
AD212 AD212
SCB
6 7 9
5 Flow sensor – B1 circuit
6 Three-way valve – B1 circuit
7 Power supply for the B1 circuit pump
8 Domestic hot water recirculating pump
9 Safety thermostat for underfloor heating flow
10 X12 R-Bus: SMART TC° connected room thermostat
on the A0 circuit
11 X28 Tdhw2: AD212 domestic hot water sensor
12 Connected room thermostat on the B1 circuit
13 Outdoor temperature sensor
14 X23: Outdoor unit bus connection
1. Connect the accessories and options to the EHC–05 PCB, respecting
the 230-400 V and 0-40 V cable feed-throughs.
2. Connect the accessories and options to the SCB-10 PCB, respecting
the 230-400 V and 0-40 V cable feed-throughs.
The icons corresponding to the CIRCB1 circuit and domestic hot
water appear on the user interface. The CIRCA0 circuit icon is
present by default.
3. To configure the back-up boiler: on first start-up or after resetting the
factory settings, set the CN1 and CN2 parameters according to the
output information on the data plate of the outdoor unit.
8 Connection and installation examples
8
3 2
1
EH904 EH904
13 12
5
MIT-M 81