EKHBH/X016AB
Indoor unit for air to water heat pump system
4PW42457-1
Installation manual
14
S
TART
-
UP
AND
CONFIGURATION
The indoor unit should be configured by the installer to match the
installation environment (outdoor climate, installed options, etc.) and
user expertise.
DIP switch settings overview
DIP switch SS2 is located on the switch box PCB (see
) and allows configuration of domestic
hot water tank installation, room thermostat connection and pump
operation.
Room thermostat installation configuration
The following table summarizes the required configuration and
thermostat wiring at the terminal block in the switch box. Pump
operation is listed in the third column. The three last columns indicate
whether the following functionality is available on the user interface
(UI) or handled by the thermostat (T):
•
space heating or cooling on/off (
y
)
•
heating/cooling changeover (
=
)
•
heating and cooling schedule timers (
pr
)
Pump operation configuration
Without room thermostat
When no thermostat is connected to the indoor unit, pump operation
will be determined by the leaving water temperature.
To force continuous pump operation when no room thermostat is
connected do the following:
-
set toggle switch SS2-3 to ON,
-
short-circuit the terminal numbers 1-2-4 on the terminal block
in the switch box.
With room thermostat
When a thermostat is connected to the indoor unit, the pump will
operate continuously whenever there is heating or cooling demand
requested by the thermostat.
It is important that all information in this chapter is read
sequentially by the installer and that the system is
configured as applicable.
Switch off the power supply before opening the switch box
service panel and making any changes to the DIP switch
settings.
DIP
switch
SS2
Description
ON
OFF
1
Not applicable for installer
—
(Default)
2
Domestic hot water tank
installation
(see
tank installation
configuration" on page 15
Installed
Not installed
(Default)
3
Room thermostat
connection
(see
installation configuration"
on page 14
)
Room thermostat
connected
No room
thermostat
connected
(Default)
4
This setting
(a)
decides the
operation mode when
there is a simultaneous
demand for more space
heating/cooling and
domestic water heating.
(a) only applicable in case DIP switch 2 = ON
Heating/cooling
priority
No priority
(Default)
■
When no room thermostat is connected to
the indoor unit, toggle switch SS2-3 should be
set to OFF.
■
When a room thermostat is connected to the
indoor unit, toggle switch SS2-3 should be set
to ON.
■
On the room thermostat, set the hysteresis appropriately to
prevent the pump from repeatedly turning on and off (i.e.
chattering), and thereby impacting the lifetime of the pump.
NOTE
■
When a room thermostat is connected to the
indoor unit, the heating and cooling schedule
timers are never available. Other schedule timers
are not affected. For more information on the
schedule timers, refer to the operation manual.
■
When a room thermostat is connected to the
indoor unit, and the
=
button or
y
button is
pressed, the centralised control indicator
e
will
flash to indicate that the room thermostat has
priority and controls on/off operation and change
over operation.
4
3
2
1
ON
OFF
4
3
2
1
ON
OFF
4
3
2
1
ON
OFF
Thermostat
Configuration
Pump
operation
y
y
y
y
=
=
=
=
p
p
p
pr
r
r
r
No thermostat
• SS2-3 = OFF
• wiring: (non)
determined by
leaving water
temperature
(a)
(a) The pump will stop when space heating/cooling is turned off or when the water
reaches the desired water temperature as set on the user interface. With space
heating/cooling turned on, the pump will then run every 5 minutes during 3
minutes to check the water temperature.
UI
UI
UI
• SS2-3 = ON
• wiring:
on when space
heating or
cooling is on
(
y
)
UI
UI
UI
Heating only
thermostat
• SS2-3 = ON
• wiring:
on when
heating
request by
room
thermostat
T
—
—
Thermostat with
heating/cooling
switch
• SS2-3 = ON
• wiring:
on when
heating
request or
cooling request
by room
thermostat
T
T
—
th =
Thermostat contact
C =
Cooling contact
H =
Heating contact
L, N =
230 V AC
NOTE
To set the pump speed, refer to
X2M
H C L N
1
2
3
4
X2M
H C L N
1
2
3
4
X2M
H C
th
L N
1
2
3
4
X2M
H C
H
th
C
L N
1
2
3
4
