Installation manual
21
RKHBH/X008BA
Indoor unit for air to water heat pump system
4PW54224-1A
START-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 "Switch box
main components" on page 11) 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 (X2M: 1, 2, 3, 4) 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)
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 "Domestic hot water
tank installation
configuration" on page 22)
Installed Not installed
(Default)
3 Room thermostat
connection
(see "Room thermostat
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).
■ When no room thermostat is connected to
the indoor unit, toggle switch SS2-3 should be
set to OFF.
■ When the room thermostat is connected to
the indoor unit, toggle switch SS2-3 should be
set to ON.
■ On the room thermostat, confirm the correct settings (6®02=yes,
6®05=9, 6®06=5) to prevent the pump from repeatedly turning on
and off (i.e. chattering), and thereby impacting the lifetime of
the pump.
4321
ONOFF
4321
ONOFF
4321
ONOFF
■ When the 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 the 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.
Thermostat Configuration
Pump
operation
yy
yy
==
==
pp
pp
rr
rr
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: (see
installation
manual of the
room
thermostat kit)
on when
heating
request by
room
thermostat
T——
Thermostat with
heating/cooling
switch
• SS2-3 = ON
• wiring: (see
installation
manual of the
room
thermostat kit)
on when
heating
request or
cooling request
by room
thermostat
TT—
X2M
1234
X2M
1234
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