EKHBH/X030BA
Indoor unit for air to water heat pump system
4PW62568-1 – 07.2010
Installation manual
11
Switch box main components
1.
Backup heater contactors K1M, K2M, K5M and K6M.
2.
Main PCB
The main PCB (Printed Circuit Board) controls the functioning of
the unit.
3.
Booster heater contactor K3M (only for installations with
domestic hot water tank)
4.
Booster heater circuit breaker F2B (only for installations with
domestic hot water tank)
The circuit breaker protects the booster heater in the
domestic
hot
water tank against overload or short circuit.
5.
Backup heater circuit breaker F1B, F3B
The circuit breaker protects the backup heater electrical circuit
against overload or short circuit.
6.
Terminal blocks
The terminal blocks allow easy connection of field wiring.
7.
Cable tie mountings
The cable tie mountings allow to fix the field wiring with cable
ties to the switch box to ensure strain relief.
8.
Terminal blocks X3M, X4M (only for installations with domestic
hot water tank)
9.
PCB fuse FU1
10. DIP switch SS2
The DIP switch SS2 provides 4 toggle switches to configure
certain installation parameters. See "DIP switch settings
overview" on page 22.
11. X13A socket
The X13A socket receives the K3M connector (only for
installations with domestic hot water tank).
12. X9A socket
The X9A socket receives the thermistor connector (only for
installations with domestic hot water tank).
13. Pump fuse FU2 (in line fuse)
14. Transformer TR1
15. A4P
Digital I/O PCB (only for installations with solar kit or digital I/O
PCB kit).
16. Transformer TR2 24 V AC for valves and relays (multi-tap)
17. Terminal block X8M
The terminal block X8M is used to select the power input to
transformer TR2.
18. 3-way valve relay K1A
19. 2-way valve relay K2A
20. Heating/second set point demand relay K3A
21. Cooling/ first set point demand relay K4A
22. Fuse for valves and relays FU3
23. Alarm output relay K5A (only for installations with digital I/O PCB
kit)
24. Heating/cooling ON/OFF output relay K6A (only for installations
with digital I/O PCB kit)
25. Solar input relay K7A (only for installations with solar kit)
26. Terminal block (only for installations with digital I/O PCB kit)
K5A
K6A
K7A
TR1
TR2
X8M
K1M
K2M
K5M
K3M
K6M
F2B
F3B
F1B
X1M
X3M
X2M
X4M
A1P
K1A
K2A
K4A
K3A
14
16
12
11
10
9
15
6
6
1
17
2
3
21
1
5
13
8
7
8
X9A
X13A
SS2
FU2
26
A4P
22
FU3
FU1
19
4
5
24
23
20
25
18
X7M
NOTE
The electrical wiring diagram can be found on the
inside of the switch box cover.
4PW62568-1.book Page 11 Wednesday, June 30, 2010 12:02 PM
Содержание EKHBH030BA
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