55
INSTALLATION
ENGLISH
Terminal Block Information
- For 3 Series
Symbols used below pictures are as follows :
- L, L1, L2 : Live (220-240 V~)
- N : Neutral (220-240 V~)
- BR : Brown, WH : White, BL : Blue, BK : Black
Case 1 (From September, 2020)
Terminal Block 1
THERMOSTAT
(Default : 230 V AC)
MIX
PUMP
MIXING VALVE
2WAY VALVE
(A)
L
L1
N
L
L1
N
L
N
L1
L2
11
12
13
14
15
16
17
18
19
20
3WAY VALVE
(B)
WATER
PUMP
(B)
3WAY VALVE
(A)
L1
L2
N
L
N
L
L
L1
N
N
1
2
3
4
5
6
8
9
7
10
Water flow switching between
using solar thermal heating and
skipping solar thermal heating
Water flow switching between
under floor heating and
DHW tank heating
Energizing water pump for
solar thermal system
Opening or closing
water flow for FCU cooling
Power supply for
2
nd
heating kit
Connection for thermostat
(230 V AC)
Supporting type : Heating only or
Heating/Cooling
WATER TANK
HEATER
L1
L2
21
22
Turn on or off DHW
tank heater
E/HEATER OUT
SENSOR (5 V DC)
L1
L2
29
30
Connection for
E/HEATER OUT SENSOR
3rd PARTY
CONTROLLER
HEATER
(B)
HEATER
(A)
L
N
L
N
A
B
23
24
25
26
27
28
Turn on or off backup heater
Connection for 3
rd
PARTY CONTROLLER
Terminal
Block 4
(Accessory)
Terminal
Block 2
Terminal
Block 1
Terminal
Block 3
Terminal Block 2
Terminal Block 3
Terminal Block 4
Turn on or off backup heater
Connection for thermostat
(230 V AC)
Supporting type : Heating only or
Heating/Cooling
HEATER
(A)
HEATER
(B)
THERMOSTAT
(Default : 230 V AC)
L
N
L
N
L
N
L1
L2
21
22
23
24
25
26
27
28
29
30
Connection for 3
rd
PARTY CONTROLLER
Opening or closing
water flow for FCU cooling
Power supply for 2
nd
heating kit
3rd PARTY
CONTROLLER
MIX
PUMP
MIXING VALVE
2WAY VALVE(A)
A
B
L
N
L1
L2
N
L
L1
N
11
12
13
14
15
16
17
18
19
20
Energizing water
pump for solar
thermal system
Water flow switching between
under floor heating and
DHW tank heating
Water flow switching between using
solar thermal heating and skipping
solar thermal heating
Turn on or off DHW
tank heater
3WAY VALVE
(B)
WATER
PUMP
(B)
WATER
TANK
HEATER
3WAY VALVE
(A)
L
L1
N
L
N
L
L
L1
N
N
1
2
3
4
5
6
8
9
7
10
Terminal Block 2
Terminal Block 3
E/HEATER OUT
SENSOR (5 V DC)
L1
L2
31
32
Connection for
E/HEATER OUT SENSOR
Terminal
Block 4
(Accessory)
Terminal
Block 1
Terminal
Block 2
Terminal
Block 3
Terminal Block 4
Case 2 (Until August, 2020)
Terminal Block 1
h
Refer to Terminal Block Information according to the C/Box shape.