Mitsubishi Electric EHSD-MEE - Page 28

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Menu subtitle Function Range Unit Default value
DHW target temp.
Desired temperature of stored hot water 40 - 70*1 °C 50
[Max. temp. drop] Di󰀨erence in temperature between the DHW maximum temperature and the temperature at which DHW
mode restarts
5 - 40*2 °C 10
[Max. operation time]
Maximum time allowed for stored water heating DHW mode 30 - 120 min. 60
[Interval]
The time period after DHW mode when space heating has priority over DHW mode temporarily preventing
further stored water heating
(Only when DHW max. operation time has passed.)
30 - 120 min. 30
*1 The maximum temperature di󰀨ers depending on the connected outdoor unit. (60°C/65°C/70°C)
*2 When the DHW maximum temperature is set over 55°C, the temperature at which DHW mode restarts must be less than 50°C to protect the device.
[Eco]
DHW mode can run in either normal or Eco mode. Normal mode will heat the water in the DHW tank fast using the full power of the heat pump. Eco mode takes a little
longer to heat the water in the DHW tank, but the energy used is reduced. This is because heat pump operation is restricted using signals from the FTC based on
measured DHW tank temperature.
Note: The actual energy saved in Eco mode will vary according to outdoor ambient temperature.
[Volume]
Select the amount of DHW tank. If you need much hot water, select [Large].
Return to the DHW/legionella prevention menu.
Legionella prevention mode settings (LP mode)
• [Legionella]: It can be activated/deactivated by the toggle.
The target temperature can be changed by +/-.
From the edit icon
, [Start time], [Duration], [Frequency], and [Max. operation time] can be set.
• [Schedule]: It can be activated/deactivated by the toggle.
• [Always o󰀨]: It can be activated/deactivated by the toggle.
During LP mode, the temperature of the stored water is increased above 60°C to inhibit legionella bacteria growth. It is strongly recommended that this is done at
regular intervals. Please check local regulations for the recommended frequency of heat ups.
Note: When failures occur on the hydrobox, the LP mode may not function normally.
Menu subtitle Function Range Unit Default value
Hot water temp. Desired temperature of stored hot water 60 - 70 °C 65
[Start time] Time when LP mode will begin 0:00 - 23:00 - 03:00
[Duration] The time period after LP mode desired water temperature has been reached 1 - 120 min. 30
[Frequency] Time between LP mode DHW tank heat up 1 - 30 day 15
[Max. operation time] Maximum time allowed for LP mode DHW tank heat 1 - 5 hour 3
Please note that LP mode uses the assistance of electric heaters to supple-
ment the energy input of the heat pump. Heating water for long periods of time
is not e󰀩cient 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.
9-3. Setting
From the menu icon , access [Setting].
The following items can be edited in [Setting].
• [Date / time]
• [Display] (From [Setting], the screen can be switched to the full screen or the base screen.)
• [Language]
• [Room sensors]
• [Contact number]
• [Touch screen] ([Calibrate screen]*1, [Clean screen]*2, [Brightness], and [Backlight time])
Follow the procedure described in General Operation for the set up operation.
*1 Touching the 9 dots displayed on the screen starts calibration.
To properly calibrate the touch panel, use a pointy but not sharp object to touch the dots.
Note: A sharp object may damage or scratch the touch screen.
*2 You can wipe the screen while touch operations are invalid for 30 seconds.
Wipe with a soft dry cloth, a cloth soaked in water with mild detergent, or a cloth dampened with ethanol.
Do not use acidic, alkaline, or organic solvents.
[Room sensors]
For [Room sensors], it is important to choose the correct room sensor depending on the heating and cooling mode the system will operate in.
OCH815A