ENGLISH-48
Wiring work
Connection of the back-up boiler
Description
No. of wires
Mini. / Max. current
Thickness
Supply Scope
Back-up Boiler
2+ground
10mA / 50mA
0 .75mm
2
H05RN-F or
H07RN-F
Field supply (220-240V~,
Input)
L N
L N
When it set back up
boiler on the hydro unit
(relay off )
Boiler
B4 : Back-up boiler (L)
B5 : Neutral (N)
Boiler
When it order to back up
boiler operates (relay on)
1 . Before the installation, hydro unit should be turned off .
2 . Using the appropriate equipment to correct position of terminal
block as shown on the diagram .
3 . Make sure EXT-CTRL signal of back up boiler must be 230Vac .
- Do not connect supply power of back up boiler directly .
❋
❋
Heat pump does not work when the Back-up boiler operates .
Connecting for external contact functions
Screw size
Tightening torque (N·m)
Part
Terminal code
M3
0 .5~0 .75
20P Terminal block
1~20
Connecting external sensors for zone control
1 2 3 4 5 6
7 8 9 10 11 12 13 14 15 16 17 18 19 20
ZONE2
Room
Temp .
(103)
ZONE1
Flow
Temp .
[Tw2_z1]
(103)
ZONE2
Flow
Temp .
[Tw2_z2]
(103)
• When connecting sensors, use a Thermistor with the specifications of 10 kΩ at 25
°C
, B constant = 3435 k .
CAUTION
