Switch Box Main Components; Functional Diagram - Rotex RKHBH008AA Manuel D'installation

Switch box main components

K1M
TR1
14
TR1
X9A
12
X13A
11
SS1
SS2 on
10
on
SS2
off
A1P
FU1
9
A1P
15
A4P
A4P
OPTION EKHW
X4M
1 2
X4M
8
OPTION EKHW
X3M
L1 L2
L N
X3M (230V)
1. Backup heater contactors K1M, K2M 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
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 15.
11. X13A socket
The X13A socket receives the K3M connector (only for
installations with domestic hot water tank).
RKHBH/X008AA
Indoor unit for air to water heat pump system
4PW50203-1A
K5M
K2M
K1M
K5M
K2M
OPTION EKHW
K3M
K3M
OPTION EKHW
F2B
F1B
F2B F1B
K4M
K6M
FU2
X2M
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Q2L
thermal
thermostat 2-way valve 3-way valve
fuse OPTIONAL
X2M
X1M
domestic
12. X9A socket
The X9A socket receives the thermistor connector (only for
installations with domestic hot water tank).
13. In line fuse FU2
14. Transformer TR1
1
15. A4P
Remote alarm address card (only for installations with remote
alarm kit).
NOTE The electrical wiring diagram can be found on the
inside of the switch box cover.
2

Functional diagram

3
2 3 4
4
5
R1T
t >
13
6
H
2
6
R3T
t >
7
1 14
1 Outdoor unit
2 Indoor unit
3 Expansion vessel drain
valve
4 Expansion vessel
5 Manometer
6 Air purge valve
7 Pressure relief valve
8 Backup heater vessel
with backup heater
9 Pump
5 6 7 8 9
R2T
t >
O
R4T
t >
10 Flow switch
11 Shut-off valve water outlet
with drain valve (field
installation)
12 Shut-off valve water inlet with
drain valve (field installation)
13 Filter
14 Heat exchanger
R1T
R2T
Temperature sensors
R3T
R4T
Installation manual
10
11
12
13
7