1
3
. Installation
Connecting external contact
External contact connection diagram
Indoor temperature
sensor
Temperature sensor
for water tank
Solar pump
Smart grid
External control
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Ⓙ
Ⓚ
Ⓜ
Ⓛ
Ⓝ
V1
V2
L N
L
Ⓗ
Ⓖ
N
Ⓐ
Main power
Ⓑ
Operation check
Ⓒ
Alarm
Ⓓ
Water pump
Ⓔ
Booster heater
Ⓕ
3Way valve 1
2Way valve
3Way valve 2
AC 24 V Thermostat
208-230 V Thermostat
Wired remote controller
Outdoor unit
(communication cable)
Water IN/OUT (Hydro unit)
Water IN/OUT (Hydro unit HT)
EVA IN/OUT (Hydro unit /
Hydro unit HT)
Defrost
Flow switch
Ⓘ
Ⓠ
Connected as factory default
<DVM Hydro unit>
Indoor temperature
sensor
Solar pump
External control
1 2 3 4 5 6 7 8 9 10
Ⓙ
Temperature sensor
for water tank
Ⓚ
Ⓜ
Ⓛ
Ⓝ
Smart grid
<DVM Hydro unit HT>
L N