Functional Diagram Of Hydraulic Compartment (Door 3); Switch Box Main Components (Door 2) - Daikin Altherma EDHQ011BB6V3 Installation Manual

14. Flow switch
The flow switch checks the flow in the water circuit and protects
the heat exchanger against freezing and the pump against
damage.
15. Pump
The pump circulates the water in the water circuit.
16. Backup heater thermal protector
The backup heater is equipped with a thermal protector. The
thermal protector is activated when the temperature becomes
too high.
17. 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).
18. Pressure relief valve
The pressure relief valve prevents excessive water pressure in
the water circuit by opening at 3 bar and discharging some
water.

Functional diagram of hydraulic compartment (door 3)

1 2 3 4
R11T
t >
H O
2
R13T
t >
8 9
1 Expansion vessel
2 Manometer
3 Air purge valve
4 Pressure relief valve
5 Backup heater vessel with backup heater
6 Pump
7 Shut-off valve water outlet
8 Heat exchanger
9 Flow switch
10 Drain/fill valve
11 Filter
12 Shut-off valve water inlet with drain valve
R11T~R14T Temperature sensors
Installation manual
11
5 6 7
R12T
t >
R14T
t >
10 11 12

Switch box main components (door 2)

A
A
9
9
8
B
15
3
1
24
1
5
4
2
D
25
6
7
18
19
8
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
hot water tank against overload or short circuit.
5. Backup heater circuit breaker F1B
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. Terminal block for backup heater capacity limitation.
8. Cable tie mountings
The cable tie mountings allow to fix the field wiring with cable
ties to the switch box to ensure strain relief.
9. Terminal blocks X3M, X4M (only for installations with domestic
hot water tank)
10. PCB fuse FU1
11. DIP switch SS2
The DIP switch SS2 provides 4 toggle switches to configure
certain installation parameters. See
overview" on page 28.
12. X13A socket
The X13A socket receives the K3M connector (only for
installations with domestic hot water tank).
B C
D
C
14
FU2
10
FU1
16
17
12
X13A
11
SS2
13
X9A
8
23
6
8
21
20
22
domestic
"10.1. DIP switch settings
E(D/B)(H/L)Q011~016BB
Unit for air to water heat pump system
4PW67904-1 – 01.2011