Installation manual

11
4.3.1 Heat pump electrical connection
To make electrical connections to the heat pump:
 Feed power cable and controller cable through
gland at the back of the base panel.
 Remove the cable access cover and using the
opening in the base panel for access, pull power
cable and controller cable through the two cable
glands in base panel and through the two
glands on the side of the electric box. Once
cables have been routed through the base
glands, close the access cover.
 Allow sufficient cable to ensure the connections
are not strained when the cover is opened.
Armoured cable must be stripped once it has
been pulled through the base cable gland in
order to pass through cable gland in side panel
of the electrical box.
 Connect power cable and controller cable as
shown in figure 10. Where stranded cable (e.g.
Tri rated singles) has been used, a ferrule must
be fitted before inserting into the push
connections.
 The controller (Modbus) cable is then connected
from the heat pump to the wiring centre (see
wiring diagrams in Appendix C and D).
5 Set To Work
5.1 Location of indoor components
Location of UI and room thermostats:
The user interface and room thermostats should be
installed indoors in a location that is out of reach of
children, but where the LCD display can be easily
seen (usually 1.2m – 1.7m from the floor).
The controller and thermostats should be installed on
internal walls in living area to reflect the correct
temperature, and away from direct sunlight, drafts
(windows and doors) and heat emitters.
Location of wiring centre:
If a Dimplex A-Class cylinder is used, the wiring
centre is built in and pre-wired. If a non A-Class
cylinder is used, it is recommended to install the
wiring centre in close proximity to the cylinder.
5.2 Set to work
When starting up the heat pump you must first
ensure that;
 All covers are replaced.
 The heat pump isolator switch is switched on.
 The heat pump is connected to the mains power
supply via a separate suitable circuit breaker
and RDC protection.
 The wiring centre or DHW cylinder is connected
to the mains power supply.
 The Modbus network is complete and the UI
and the heat pump are connected to the wiring
centre or DHW cylinder.
Once the connections have been made and the power
supplies have been switched on, the system may take
a couple of minutes to start up.
5.3 Opening the User Interface
It is recommended to connect the Modbus cable in
daisy-chain series (as shown in figure 11) from the
heat pump on to the wiring centre and then on to the
UI.
If it is deemed necessary to install the Modbus cable
in a different order, please ensure that the jumper is
put into the OFF position on the UI and that the last
component in the network has a jumper in the ON
position, as shown in figure 13.
The cover of the UI must be removed in order to
move the jumper. To remove the cover;
 Unscrew the screw at the bottom of the UI and
lift the cover and rotary dial.
To replace;
 Position the rotary dial over the holding pin on
the board, ensuring the two are lined up
correctly.
 Replace cover and bottom screw.
 Ensure that rotary dial is tested and working
once cover has been replaced.
Jumper
Figure 13: Jumper in the ON position on water module