Switch Box Main Components - Daikin EKHBHE008BA3V3 Installation Manual

14. Water filter
The water filter removes dirt from the water to prevent damage
to the pump or blockage of the evaporator. The water filter must
be cleaned on a regular base. See
on page 32.
15. Manometer
The manometer allows readout of the water pressure in the
water circuit.
16. Flow switch
The flow switch checks the flow in the water circuit and protects
the heat exchanger against freezing and the pump against
damage.
17. Pump
The pump circulates the water in the water circuit.
18. Backup heater thermal protector
The backup heater is equipped with a thermal protector. The
thermal protector is activated when the temperature becomes
too high.
19. Backup heater thermal fuse
The backup heater is equipped with a thermal fuse. The thermal
fuse is blown when the temperature becomes too high (higher
than the backup heater thermal protector temperature).
20. Pressure relief valve
The pressure relief valve prevents excessive water pressure in
the water circuit by opening at 3 bar and discharging some
water.
21. Pressure relief valve hose
The actual outlet of the pressure relief valve. Make sure to
provide a proper drain.
EKHBH/XE008BA
Indoor unit for air to water heat pump system
4PW56301-1A
"Maintenance and service"

Switch box main components

14
TR1
X9A
12
A1P
X13A
11
SS2
10
FU1
9
15 A4P
6
X2M
6
1. Backup heater contactors K1M and K5M.
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
water tank against overload or short circuit.
hot
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
overview" on page 20.
11. X13A socket
The X13A socket receives the K3M connector (only for
installations with domestic hot water tank).
K5M
K1M
K3M
F2B F3B F1B
FU2
X4M
X1M
X3M
domestic
"DIP switch settings
Installation manual
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