Installation manual

9
2 Preparation
2.1 Site Selection
2.1.1 L OCATION OF H EAT P UMP
• The heat pump must be installed outdoors with adequate clearances for ventilation and maintenance. It is
recommended that the heat pump is installed along the property wall, as shown in figure 3.
• There must be a minimum distance of 1m in front of the fan to prevent air re-circulation.
• Positioning the heat pump in a confined space, frost hollow or well will result in reduced heat pump efficiency, as the
cold air which is expelled by the fan cannot disperse and may be drawn back into the system. This means that the
heat pump may be operating using a lower inlet temperature than what is actually available from the surrounding
ambient air, and will therefore run less efficiently.
• The fan should preferably not face prevailing winds to ensure correct air flow through the evaporator.
• Although the heat pump is within noise and vibration regulations outlined in MCS007, it is recommended to avoid
positioning it close to bedroom windows, as the fan and compressor may be operational at night.
2.1.2 L OCATION OF INDOOR COMPONENTS
The controller/user interface that is supplied with the Dimplex A-Class heat pump is used as a heat pump controller as
well as a heating and domestic hot water (DHW) controller. It is also the preferred option for use as a room temperature
control device. 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).
While only one user interface is currently available per system, there are additional options of either temperature
probes or mechanical thermostats, which can be used to control the temperature in up to four zones. Mechanical
thermostats provide less control over the heating system, while the temperature probe option allows the heat pump to
sense changes in demand and adjust accordingly. The temperature probe option is generally recommended over the
mechanical thermostat option.
A zone is defined as the physical area of the home in which temperatures are controlled by each individual device. For
example, there might be a user interface installed in the living area, in which case this may be referred to as zone 1.
There may also be a temperature probe installed upstairs in the sleeping/bedroom area, which would then be
designated as zone 2, and so on. Extra zones are an additional, optional feature of the heating system. The standard
package comes with one User Interface and the possibility of four separate zones.
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.
L OCATION 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, the
wiring centre module must be installed. The wiring centre module is designed to be wall mounted, and it is
recommended that it is installed in close proximity to the cylinder to allow for installation of components which require a
control cable (modbus) connection, i.e. pump, DHW probe, 3-port valve and heat pump connections.