Installation manual
20
EKHBH/XE008BA
Indoor unit for air to water heat pump system
4PW56301-1A
Relocation of the digital controller
The digital controller is from factory located on the indoor unit. (See
for actual position). If required, the
digital controller can be repositioned.
Be aware that only 1 digital controller can be connected to the indoor
unit.
Wiring specifications
Mounting
1
Remove the front part of the digital controller.
Insert a slotted screwdriver into the slots (1)
in the rear part of the digital controller, and
remove the front part of the digital
controller.
2
Fasten the digital controller on a flat
surface.
3
Wire the unit.
Connect the terminals on top of the front part of the digital
controller and the terminals inside the unit (P1 to 16, P2 to 16a).
4
Reattach the upper part of the digital controller.
First begin fitting from the clips at the
bottom.
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.
Wire specification
Value
Type
2 wire
Section
0.75-1.25 mm
2
Maximum length
500 m
NOTE
The wiring for connection is not included.
NOTE
The digital controller has to be mounted indoors.
NOTE
Be careful not to distort the shape of the lower part of
the digital controller by over tightening the mounting
screws.
1
Unit
2
Rear part of the digital controller
3
Front part of the digital controller
4
Wired from the rear
5
Wired from the top
6
Notch the part for the wiring to pass through with nippers, etc.
1
P1
P2
1
1
6
2
3
4
5
P1
P2
16a
16
16a
16
NOTE
■
When wiring, run the wiring away from the
power supply wiring in order to avoid
receiving electric noise (external noise).
■
Peel the shield for the part
that has to pass through the
inside of the digital controller
case (
l
).
CAUTION
Be careful not to pinch the wiring when attaching.
It is important that all information in this chapter is read
sequentially by the installer and that the system is
configured as applicable.
WARNING
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 22
Installed
Not installed
(Default)
3
Room thermostat
connection
(see
installation configuration"
on page 21
)
Room thermostat
connected
No room
thermostat
connected
(Default)
4
This setting
(a)
decides the
operation mode of the
heat pump 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
Priority to highest
demand side
(b)
(b) Heating/cooling or domestic water heating mode can be restricted by schedule
timer and/or field settings (4, 5, 8).
1
4
3
2
1
ON
OFF
