
Installation manual
7
EKHBH/ EKSWW150-300V3/Z2
Indoor unit for air to water heat pump and sanitary warm water tank for air to water heat pump system
4PW36978-1C
Switch box main components
1
Backup heater contactors K1M, K2M and K5M (optional)
2
Main PCB
The main PCB (Printed Circuit Board) controls the functioning of
the unit.
3
Booster heater contactor K3M (only for installations with sanitary
water tank)
4
Booster heater circuit breaker F2B (only for installations with sanitary
water tank)
The circuit breaker protects the booster heater in the sanitary
water tank against overload or short circuit.
5
Backup heater circuit breaker F1B (optional)
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 sanitary water
tank)
9
PCB fuse FU1
10
DIP switch SS2
The DIP switch SS2 provides 4 toggle switches to configure
certain installation parameters. See
.
11
X13A socket
The X13A socket receives the K3M connector (only for
installations with sanitary water tank).
12
X9A socket
The X9A socket receives the thermistor connector (only for
installations with sanitary water tank).
13
Pump fuse FU2 (in line fuse)
14
Pump relay K4M
15
Transformer T1R
Functional diagram
OPTION EKSWW
OPTION EKSWW
OPTION EKSWW
N
L
L2
L1
X3M (230V)
2
1
X4M
OPTIONAL
X2M
18
17
16
15
Q2L
3-way valve
2-way valve
12
11
4
thermostat
2
1
3
5
6
7
8
9
10
13
14
thermal
fuse
F2B
F1B
F2B
F1B
K3M
K3M
K5M
K2M
K1M
T1R
TR1
K1M
K2M
K5M
OPTION EKSWW
A1P
A1P
K4M
X4M
X2M
X3M
X1M
X9A
X13A
SS2
FU1
1
4
2
10
11
12
9
8
6
6
7
3
5
X1M
L1L2 L3 N
FU2
13
14
15
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