Switch Box Main Components - Daikin EKHBH054BA Manuel D'installation

Switch box main components

X8M
15
TR1
17 TR2
X9A
12
A1P
X13A
11
SS2
10
20
FU3
23
FU1
9
A4P
16
6
X2M
6
X1M
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
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).
EKHBH/X054BA
Indoor unit for air to water heat pump system
4PW54216-1
18
1
K1M K2M K5M
2
22
3
K4A
K3M K6M 1
K3A
21
19
4
5
K1A
F2B F3B F1B
5
K2A
14
K4M
FU2
13
K5A K6A K7A
26
25
24
X7M
27
X4M
8
8
X3M
7
domestic
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. Pump relay K4M
15. Transformer TR1
16. A4P
Digital I/O PCB (only for installations with solar kit or digital I/O
PCB kit).
17. Transformer TR2 24 V AC for valves and relays (multi-tap)
18. Terminal block X8M
The terminal block X8M is used to select the power input to
transformer TR2.
19. 3-way valve relay K1A
20. 2-way valve relay K2A
21. Heating/second set point demand relay K3A
22. Cooling/ first set point demand relay K4A
23. Fuse for valves and relays FU3
24. Alarm output relay K5A (only for installations with digital I/O PCB
kit)
25. Heating/cooling ON/OFF output relay K6A (only for installations
with digital I/O PCB kit)
26. Solar input relay K7A (only for installations with solar kit)
27. Terminal block (only for installations with digital I/O PCB kit)
NOTE The electrical wiring diagram can be found on the
inside of the switch box cover.
Installation manual
11