Switch Box Main Components; Functional Diagram - Rotex Rkhbx016Ba Installationsanleitung

Switch box main components

15 TR1
X9A
12
A1P
X13A
11
SS2
10
FU1
9
16 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 domestic
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).
RKHBH/X016BA
Indoor unit for air to water heat pump system
4PW54226-1A
1
K1M K2M K5M
2
3
K3M K6M 1
4
5
F2B F3B F1B
5
14
K4M
FU2
13
X4M
8
8
X3M
7
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
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
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
Installation manual
11