RKHBH/X016AB
Indoor unit for air to water heat pump system
4PW50205-1A
Installation manual
7
Switch box main components
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
domestic
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.
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).
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).
Functional diagram
K4M
7
2-way valve
TR1
TR1
15
12
11
10
9
16
8
1
2
3
14
5
13
6
6
7
X9A
X13A
SS2
FU2
K1M
K2M
K5M
K3M
F2B
F1B
X2M
X3M
X4M
A4P
A1P
K1M
K2M
K5M
K3M
F2B
F1B
X1M
A4P
A1P
OPTION EKSWW
OPTION EKSWW
1
2
X4M
X2M
X3M (230V)
L1
L2
L
N
thermostat
3-way valve
thermal
fuse
OPTIONAL
Q2L
8
9
10
11 12
13 14
15 16
17 18
1
2
3
4
5
6
SS2
SS1
on
off
on
FU1
OPTION EKSWW
OPTION EKSWW
4
NOTE
The electrical wiring diagram can be found on the
inside of the switch box cover.
1
Outdoor unit
10
Flow switch
2
Indoor unit
11
Shut-off valve water outlet
with drain valve (field
installation)
3
Expansion vessel drain
valve
4
Expansion vessel
12
Shut-off valve water inlet with
drain valve (field installation)
5
Manometer
6
Air purge valve
13
Filter
7
Pressure relief valve
14
Heat exchanger
8
Backup heater vessel
with backup heater
R1T
R2T
R3T
R4T
Temperature sensors
9
Pump
R4T
H
2
O
t >
R3T
t >
R2T
t >
R1T
t >
10
11
12
4
3
2
5
9
13
14
1
6
7 8
1D_IM_4PW50205-1A.book Page 7 Thursday, January 29, 2009 12:00 PM
