Control Board; Heating Function; Cooling Function; Domestic Hot Water Function - Dimplex LA 6 MR Installation And Operating Instructions Manual

8.2 Control Board

8.3 Heating Function

Set switch (1) to position On (I) to put heat pump into operation.
The heating mode can be preselected by placing switch (3) to the
Heating ( ) position. The desired return temperature can be set
using selector dial (4), the relevant call for heat is controlled by
the potentiometer and lies within a range of min. 10 °C and max.
55 °C. If the preset temperature is reached, the heat pump
switches off. Once the return temperature drops below the preset
temperature by 4 Kelvin, the heat pump switches back on. In the
event that the preset return temperature cannot be reached, the
output for the back-up heater cuts in after approx. 1 hour. The
heat pump cannot be restarted until a minimum time delay of
5 minutes has elapsed. At a supply temperature of approx. 60 °C
or if the air temperature is too low, the heat pump switches off.
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8.4 Cooling Function

Place switch (1) in position On (I) to put heat pump into opera-
tion. The cooling mode can be preselected by placing switch (2)
to the Cooling ( ) position. The desired return temperature can
be set using selector dial (4), the relevant call for heat is control-
led by the potentiometer and lies within a range of min. 12 °C and
max. 25 °C. When the preset temperature is reached, the heat
pump switches off. Once the return temperature exceeds the
preset value by 4 Kelvin, the heat pump switches back on. The
heat pump cannot be restarted until a minimum time delay of
5 minutes has elapsed. At a supply temperature of below 7 °C,
the heat pump switches off.
To prevent condensate from forming on the system in the case of
surface cooling systems, it is recommended that dew point mon-
itors be installed at critical places of the cold distribution system
and connected in lieu of jumper A1. In the event that condensa-
tion should form, the cooling operation of the system will be inter-
rupted.

8.5 Domestic Hot Water Function

This heat pump can also be used for heating domestic water.
The call for domestic water heating (and the domestic water tem-
perature) is controlled by terminal "X2-7" by means of a thermo-
stat to be provided by the client. This thermostat connects phase
(L) to terminal "X2-7" and controls a reversing valve which is part
of the hot water switch group "N13".
A suitable thermostat is available as an accessory.
Domestic hot water preparation can also be requested even if no
heating has been requested. If a request has been made, the
control system raises the setpoint to the maximum.
After the domestic hot water preparation has been terminated,
the system returns to the same function that was active before
the call.
8.5
EN-7