Mitsubishi Electric ecodan ECOSLIM150L-PP-MEUK Installation Manual page 56

Main Controller
25
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 temperature or for the maximum DHW time, whichever occurs first. However,
should there be a high demand for hot water 'Forced DHW' function can be used to prevent the system from routinely
switching to space heating and continue to provide DHW tank heating. Forced DHW operation is activated by pressing
button F1 and Back button in the 'Option Screen'. After DHW operation finishes, the system will automatically return to
normal operation. To cancel forced DHW operation hold down button F1 in the 'Option Screen'.
Heating
The heating menu deals with space heating, using either a radiator or underfloor system depending on the
installation. The system can run in one of three modes, weather compensation, room compensation or fixed flow
temperature. When using Mitsubishi Electric thermostats/sensors it is recommended that room compensation
mode is used. When using third party thermostats for example on a multi-zone underfloor heating system either
weather compensation mode or room compensation mode can be used. Weather compensation mode must be
programmed to suit the system design for the building in question. Fixed flow temperature mode is a function that
is utilised for commissioning only.
From the main settings menu
1. Use F2 and F3 buttons to highlight heating/cooling icon then press CONFIRM.
2. The heating menu will be displayed.
3. To select the sub-menus press the function button below the icon required. E.g. for mode change
of Zone1 press F1
Heating
1. Under this sub-menu the mode of heating is selected.
2. Choose between
• Heating flow temperature
• Heating room temperature
• Heating compensation curve
Heating room temperature cannot be selected both in Zone1 and Zone2. To choose between the different modes
for heating, highlight the mode preferred and press select.
If the compensation curve mode is selected as the heating mode please read the following instructions over leaf.
Pre-Plumbed Slimline Cylinder Installation Manual
56
(continued)