Midea MHC - V18W/D2RN8 - DIP Switch Settings

M thermal Mono
48 202005
Midea M thermal Mono Engineering Data Book
Table 3-4.1: Wiring requirements
Item
Description
Current
Required number of conductors
Maximum running current
1
Solar energy kit signal wire
AC
2
200mA
2
User interface wire
AC
5
200mA
3
Room thermostat wire
AC
2 or 3
200mA
a
4
Boiler control wire
/
2
200mA
5
Temperature sensor wire for Tw2
DC
2
b
9
Control wire for DHW PUMP
AC
2
200mA
a
10
Control wire for 3-way valve
AC
2 or 3
200mA
a
11
Control wire for 3-way valve
AC
2 or 3
200mA
a
12
Temperature sensor wire for T5
DC
2
b
13
Control wire for booster heater
AC
2
200mA
a
15
Power supply wire for outdoor unit
AC
3+GND
c
16
Control wire for 3-way valve
AC
2 or 3
200mA
a
Notes:
a. Minimum cable section AWG 18 (0.75mm
2)
b. The temperature sensor wire (10m) are delivered with zone 2 outlet tem. Tw2 and domestic hot water tank T5.
c. See Table 3-4.2 for details.
Table 3-4.2: Outdoor unit power supply
Unit
18kW
22kW
26kW
30kW
Maximum overcurrent protector(MOP)
18
21
24
28
Wiring size(mm
2
)
6
6
6
6
5 DIP Switch Settings
DIP switch is located on the hydraulic module main control board and allows configuration of additional heating source
thermistor installation, the second inner backup heater installation, etc.
Table 3-5.1: DIP switch settings
Switch
ON=1
OFF=0
Default factory setting
S1
1
Reserved
Reserved
OFF
2
Reserved
Reserved
OFF
3/4
00=Without IBH and AHS
10=With IBH
01=With AHS for heat mode
11=With AHS for heat mode and DHW mode
OFF/OFF
S2
1
Start pumpo after six hours
will be invalid
Start pumpo after six hours will
be valid
OFF
2
without TBH
with TBH
OFF
3/4
00=variable speed pump (Max head:8.5m)
01=constant speed pump
10=variable speed pump(Max head:10.5m)
11=variable speed pump(Max head:9m)
OFF/ON
S4
Reserved
Reserved
OFF
Reserved
Reserved
OFF
Reserved
OFF/OFF
1 2 3 4
ONOFF
1 2 3 4
ON
OFF
1 2 3 4
S1
ONOFF
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