Installation manual

E(D/B)(H/L)Q011~016AA6V3+W1
Unit for air to water heat pump system
4PW51121-1A
Installation manual
18
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.
START-UP AND CONFIGURATION
The 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 (door 2)" on page 9) and allows configuration of
domestic hot water tank installation, room thermostat connection and
pump operation.
Room thermostat installation configuration
The digital controller, delivered in a kit, 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.
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 ).
Be careful not to pinch the wiring when attaching.
1
P1P2
1
1
6
2
3
4 5
P1P2
16a 16 16a 16
1
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 "Domestic hot water
tank installation
configuration" on page 19)
Installed Not installed
(Default)
3 Room thermostat
connection
(see "Room thermostat
installation configuration"
on page 18)
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 unit, toggle switch SS2-3 should be set to
OFF.
■ When a room thermostat is connected to the
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 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 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.
4321
ONOFF
4321
ONOFF
4321
ONOFF
1D_IM_4PW51121-1A.book Page 18 Tuesday, January 27, 2009 7:46 AM