Altherma EKHBH016AA, Installation Manual, Page: 16 / 32

Installation manual
13
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
Procedure
1 Using the appropriate cable, connect the power circuit to the
main circuit breaker as shown on the wiring diagram and the
illustration below.
2 Connect the earth conductor (yellow/green) to the earthing
screw on the X1M terminal.
3 Fix the cable with cable ties to the cable tie mountings to ensure
strain relief.
Note: only relevant field wiring is shown.
Connection of the sanitary water tank field wiring
(optional)
Refer to "Sanitary water tank (optional)" on page 14 for wiring details.
Connection of the thermostat cable
Connection of the thermostat cable depends on the application.
See also "Typical application examples" on page 3 and "Room
thermostat installation configuration" on page 17 for more information
and configuration options on pump operation in combination with a
room thermostat.
Thermostat requirements
■
Power supply: 230 V AC or battery operated
■
Contact voltage: 230 V.
Procedure
1 Connect the thermostat cable to the appropriate terminals as
shown on the wiring diagram.
2 Fix the cable with cable ties to the cable tie mountings to ensure
strain relief.
3 Set DIP switch SS2-3 on the PCB to ON. See "Room thermostat
installation configuration" on page 17 for more information.
Connection of the valve control cables
Valve requirements
■
Power supply: 230 V AC
■
Maximum running current: 100 mA
Wiring the 2-way valve
1 Using the appropriate cable, connect the valve control cable to
the X2M terminal as shown on the wiring diagram.
2 Fix the cable(s) with cable ties to the cable tie mountings to
ensure strain relief.
Wiring the 3-way valve
1 Using the appropriate cable, connect the valve control cable to
the appropriate terminals as shown on the wiring diagram.
2 Fix the cable(s) with cable ties to the cable tie mountings to
ensure strain relief.
Heating only thermostat Heating/cooling thermostat
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
A1P
K4M
X4M
X2M
X3M
X1M
X1M
L1L2 L3 N
L1 L2 L3
3x 230 V
3x 400 V
X1M
X1M
L1 N
L1 N
1x 230 V
X2M
H C
th
L N
1 2 3 4
X2M
H C
H
th
C
L N
1 2 3 4
NOTE Wiring is different for a NC (normal closed) valve
and a NO (normal open) valve. Make sure to
connect to the correct terminal numbers as
detailed on the wiring diagram and illustrations
below.
Normal closed (NC) 2-way valve Normal open (NO) 2-way valve
Two types of 3-way valves can be connected. Wiring
is different for each type:
■
"Spring return 2-wire" type 3-way valve
The 3-way valve should be fitted as such that
when the 3-way valve is idle (not activated), the
space heating circuit is selected.
■
"SPST 3-wire" type 3-way valve
The 3-way valve should be fitted as such that
when terminal ports 9 and 10 are electrified, the
sanitary heating circuit is selected.
"Spring return 2-wire" valve "SPST 3-wire" valve
NC
5 X2M 6 7
M
NO
5 6 X2M 7
M
9 X2M 8 10
M
9 X2M 8 10
M