Holiday Mode - Mitsubishi Electric EHSD-MEC Installation Manual

5
System Set Up
Domestic Hot Water (DHW)/Legionella Prevention
►For further detail about operation, refer to Operation manual.
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 periods of time is
not efficient and will increase running costs. The installer 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.
Heating/Cooling
►For further detail about operation, refer to Operation manual.
Schedule timer
Scheduled timer can be set in two ways, for example; one for summer and the other for winter. (Refer to as "Schedule 1" and "Schedule 2" respectively.) Once the term
(months) for the Schedule 1 is specified, rest of the term will be specified as Schedule 2. In each Schedule, an operational pattern of modes (Heating / DHW) can be set.
If no operational pattern is set for Schedule2, only the pattern for Schedule 1 will be valid. If Schedule 2 is set to full-year (i.e. March to Feb.), only the operational pattern
for Schedule 2 will be valid.
Follow the procedure described in General Operation(Page28) for the set up operation.
Setting the schedule timer
The preview screen allows you to view the current settings. In 2-zone heating operation,
press F1 to switch between Zone1 and Zone2. Days of the week are displayed across the
top of the screen. Where day appears underlined the settings are the same for all those
days underlined.
Hours of the day and night are represented as a bar across the main part of the screen.
Where the bar is solid black, space heating/cooling and DHW (whichever is selected) is
allowed.
When scheduling heating, button F1 changes the scheduled variable between time and
temperature. This enables a lower temperature to be set for a number of hours e.g. a lower
temperature may be required at night when the occupants are sleeping.
•The schedule timer for space heating/cooling and DHW are set in the same way. However for DHW only time can be used as scheduling variable.
•A small rubbish bin character is also displayed choosing this icon will delete the last unsaved action.
•It is necessary to use the SAVE function F4 button to save settings. CONFIRM does not act as SAVE for this menu.

Holiday mode

►For further detail about operation, refer to Operation manual.
Initial Settings
From the Initial settings menu the installer can set the following.
• Date/Time *Be sure to set it to the local standard time.
• Language
• Summer time
• Temp. display
• Contact number
• Time display
• ºC/ºF
• Room sensor settings
Follow the procedure described in General Operation for the set up operation.
<Room sensor settings>
For room sensor settings it is important to choose the correct room sensor de-
pending on the heating mode the system will operate in.
Time/Zone schedule setting screen
31
Menu subtitle Description
Room RC zone
When 2-zone temperature control is active and wireless remote
select
controllers are available, from Room RC zone select screen, se-
lect zone no. to assign to each remote controller.
Sensor setting
From sensor setting screen, select a room sensor to be used for
monitoring the room temperature from Zone1 and Zone2 sepa-
rately.
Control option
(pages 24 - 25)
A
B
C
D
When different
room sensors are
used according to
the time schedule
*1. Not specified (if a locally-supplied room thermostat is used)
Room RC 1-8 (one each for Zone1 and Zone2) (if a wireless
remote controller is used as a room thermostat)
*2. From sensor setting screen, select Time/Zone to make it
possible to use different room sensors according to the time
schedule set in the Select Time/ Zone menu. The room sen-
sors can be switched up to 4 times within 24 hours.
Preview screen
Corresponding initial settings room sensor
Zone1 Zone2
Room RC 1-8 (one
each for Zone1 and *1
Zone2)
TH1 *1
Main remote controller *1
*1 *1
Time/ Zone*2 *1