EKHBH/X030BA
Indoor unit for air to water heat pump system
4PW62568-1 – 07.2010
Installation manual
19
Connection of the backup heater power supply
Power circuit and cable requirements
This power circuit must be protected with the required safety devices
according to local laws and regulations.
Select the power cable in accordance with relevant local laws and
regulations. For the maximum running current of the backup heater,
refer to the table below.
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 ground conductor (yellow/green) to the grounding
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 thermostat cable
Connection of the thermostat cable depends on the application.
See also "Typical application examples" on page 4 and "Room
thermostat installation configuration" on page 23 for more information
and configuration options on pump operation in combination with a
room thermostat.
Thermostat requirements
■
Power supply: battery operated
■
Contact voltage: 24 V.
Procedure
1
Connect the thermostat cable to the appropriate terminals as
shown on the wiring diagram and installation manual of the room
thermostat kit.
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 23 for more information.
Connection of the first set point and second set point contacts
The connection of the set point contact is only relevant in case dual
set point contact is enabled.
See also "Typical application examples" on page 4 and "Dual set
point control" on page 30.
Contact requirements
The contact shall be a voltage free contact that ensure 24 V
(100 mA).
Procedure
1
Connect the contact of first set point and second set point to the
appropriate terminals as shown in the figure below
2
Fix the cables with cable ties to the cable tie mountings to
ensure strain relief.
3
Depending on the required pump operation set DIP switch
SS2-3 and field setting [F-00]. See "Pump operation
configuration" on page 23 and field setting [F-00] in "[F] Option
setup" on page 34.
Connection of the valve control cables
Valve requirements
■
Power supply: 24 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.
Use a dedicated power circuit for the backup heater and
booster heater. Never use a power circuit shared by
another appliance.
Indoor unit model
Backup
heater
capacity
Backup
heater
nominal
voltage
Minimum
circuit amps
Maximum
overcurrent
protection
EKHB*030BA3V3
3 kW
1x 230 V
14.3 A
20 A
EKHB*030BA6V3
6 kW
1x 230 V
28.6 A
30 A
L1
L2
L3
N
X1M
X3M
1x 230 V
L1
L2
L1
L2
X1M
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
NOTE
Type of 3-way valve to be connected. (Delivered
with optional domestic hot water tank)
■
"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 domestic hot water circuit is selected.
"SPST 3-wire" valve
X2M
SP1
SP2
1
2
3
4
SP1
First set point contact
SP2
Second set point contact
NC
5
X2M
6
7
M
NO
5
6
X2M
7
M
9
X2M 8
10
M
4PW62568-1.book Page 19 Wednesday, June 30, 2010 12:02 PM
Содержание EKHBH030BA
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