Switch Box Main Components; Functional Diagram - Rotex RKHBH008BA Installation Manual

Switch box main components

14 TR1
X9A
12
A1P
X13A
11
SS2
10
FU1
9
15 A4P
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 21.
11. X13A socket
The X13A socket receives the K3M connector (only for
installations with domestic hot water tank).
Installation manual
11
1
K1M K2M K5M
2
3
K3M K6M 1
4
5
F2B F3B F1B
5
FU2
13
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. Fuse FU2 (in line fuse)
14. Transformer TR1
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.

Functional diagram

2 3 4 5 6 7
R1T
t >
H O
2
R3T
t >
1 13
1 Outdoor unit
2 Indoor unit
3 Expansion vessel
4 Manometer
5 Air purge valve
6 Pressure relief valve
7 Backup heater
8 Pump
9 Flow switch
Indoor unit for air to water heat pump system
8
9
R2T
t >
10
R4T
t >
11
12
10 Shut-off valve water outlet
with drain valve (field
installation)
11 Shut-off valve water inlet with
drain valve (field installation)
12 Filter
13 Heat exchanger
R1T
R2T
Temperature sensors
R3T
R4T
RKHBH/X008BA
4PW54224-1A