Mitsubishi Electric EHSD-MEC Operation Manual page 12

4
Customising Settings for Your Home
Explanation of Legionella Prevention Mode operation
tem is diverted to heat the water in the DHW tank.
the installer (above 65°C) primary circuit water is no longer diverted to heat the
DHW tank.
/cooling circuit.
tion of this feature is set by the installer and during its operation stored water
temperature will be monitored.
and primary water flow from the heat source(s) will be directed to the DHW
tank to boost the temperature. Once the set time for Duration of Max. temp has
passed LP mode will not recur for the set interval (set by installer).
tion are compliant with local and national guidelines.
Please note that LP mode uses the assistance of electric heaters (if present)
to supplement the energy input of the heat pump. Heating water for long
should give careful consideration to the necessity of legionella prevention
treatment whilst not wasting energy by heating the stored water for excessive
time periods. The end user should understand the importance of this feature.
ALWAYS COMPLY WITH LOCAL AND NATIONAL GUIDANCE FOR YOUR
COUNTRY REGARDING LEGIONELLA PREVENTION.
Forced DHW
The forced DHW function is used to force the system to operate in DHW mode. In
normal operation the water in the DHW tank will be heated either to the set tem-
there be a high demand for hot water 'Forced DHW' function can be used to pre-
vent the system from routinely switching to space heating/cooling and continue to
provide DHW tank heating.
Forced DHW operation is activated by pressing button F1 and Back button in the
turn to normal operation. To cancel forced DHW operation hold down button F1 in
the 'Option Screen'.
Heating/Cooling
The heating/cooling menus deal with space heating/cooling using normally either
lation.
There are 3 heating modes
Heating room temp. (Auto adaptation) (
( )
Heating compensation curve (
Cooling ( )
<Room temp (Auto adaptation) mode>
This mode is explained in detail in 'Overview of Controls' Section (page 4).
<Flow temp mode>
to best suit the space heating/cooling system design, and user's desired require-
ments.
Explanation of compensation curve
During late spring and summer usually the demand for space heating is reduced.
and reduce running costs.
space heating circuit dependent on the outdoor temperature. The FTC uses in-
formation from both an outdoor temperature sensor and a temperature sensor
on the primary circuit supply to ensure the heat pump is not producing excessive
Your installer will set the parameters of the graph depending on local conditions
and type of space heating used in your home. It should not be necessary for you
riod the space heating is not heating or is overheating your home, please contact
your installer so they can check your system for any problems and update these
settings if necessary.
11
)
)
DHW tank temp.
-
Stop temp.
Legionella
hot water temp.
Restart temp.
-
Start
LP mode
-
(LP mode: Legionella Prevention mode)
-
-
: Flow temp.
: Outdoor ambient temp.
-
Stop Stop
Restart
Space
heating/
Mode
LP mode
cooling
Duration of Max. temp.
Time