DeDietrich MIT-M /E Installation, User And Service Manual page 36

5 Installation
Tab.26
Circuits
Convection fan
Underfloor heating
Radiator
365 day radiator
Continuous heating
Timer programme
Swimming pool
Domestic hot water production
Domestic hot water production, electric
only
Stratified tank (2 sensors)
Buffer tank used as a low-loss header
Buffer tank for storage
Deactivation
Fig.26
X27
X24
X15
X28
X1
X26
X12
X2 X25
X4
X5
X17
X19
X30
X16
X23
X22 X13 X6 X7 X8
36 MIT-M
CIRCA0
(EHC–05)
X
X
(Use the
direct
zone un­
derfloor
heating
option)
X
X
X
X
X
T dhw 1
T dhw 2
T out
R-Bus
BL1 IN
BL2 IN
So+ So-
Condensation
X9
X20
X10
X18
MW-1001169-4
X21
DHW CIRCA1 CIRCB1
(EHC–05) (SCB-10) (SCB-10)
X X
X X
X X
X X
X X
X X
X X
X X X
X X X
X
X X X
X
X X X
Description of the EHC–05 PCB
X1 Main power supply for the 230 V - 50 Hz indoor module
X4 Hydraulic version: Hydraulic back-up pump
Electrical version: Electrical back-up - stage 1
X5 Hydraulic version: Hydraulic back-up ON/OFF contact
Electrical version: Electrical back-up - stage 2
X7 Local communication bus to the SCB-10 PCB
X8 Control panel display for the indoor module
X9 Sensors
X10 Speed control signal for the heat pump circulating pump
X12 Options
R-Bus: SMART TC° connected room thermostat, on/off
thermostat, modulating thermostat or OpenTherm thermostat for
the CIRCA0 direct zone
BL1 / BL2: multifunction inputs
So+/So- : Electric energy meter
Condensation: condensation sensor
X15 Not used
X16 Not used
X17 Not used
X18 Input/output for the PAC-IF-020–E PCB
X19 Control signal for the immersion heater on the domestic hot water
tank
X22 Bus for communication with the outdoor unit PAC-IF-020–E PCB
X23 Bus for communicating with the outdoor unit
X24 Not used
X25 Heating reversing valve: CIRCA0 /Domestic hot water: DHW
X26 CIRCA0 direct heating circuit pump
X27 Heat pump circulating pump power supply
X28 Temperature sensor:
T dhw 1: Temperature sensor at the bottom of the DHW
domestic hot water tank (optional)
CIRCC1 CIR­ DHW1
(with CAUX1 (SCB-10)
AD249 op­ (with
tion) AD249 op­
tion)
X
X
X
X
X
X X X
X
X X X
X
X
X X X
X X X
7756241 - v02 - 19062020