Mitsubishi Electric EHST20 Series Manuel d'utilisateur télécharger pdf (Page 13)

Tank temp.

Time

Stop

Start

Restart

Restart temp.

Stop temp.

( LP mode : Legionella Prevention Mode )

LP mode

Mode

finish

Duration of Max. temp.

Legionella

hot water temp.

Space

Heating

Customising Settings for Your Home

• At the time entered by the installer ‘Start time’ useful heat from the system is

diverted to heat the water in the storage tank.

• When the temperature of the stored water exceeds the ‘Hot Water temp.’ set

by the installer (above 65°C) water is no longer diverted to the tank.

• Whilst legionella prevention mode is in operation hot water is not directed to

the space heating circuit.

• Directly after LP mode operation ‘Duration of max. temp’ will operate. The du

ration of this feature is set by the installer and during its operation stored water

temperature will be monitored.

• If stored water temperature should drop to LP restart temp, LP mode will re

start and water ow from the plate heat exchanger will be directed to the tank

to boost the temperature. Once the set time for duration of max. temp has

passed LP mode will nish and not recur for the set interval (set by installer).

• It is the responsibility of the installer to ensure the settings for legionella pre

vention are compliant with local and national guidelines.

Important

Please note that LP mode uses electric heaters (if present) to supplement the en-

ergy input of the heat pump. Heating water for long periods of time is not ef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. End-users should seek ad-

vice from their installers if they wish to change the LP mode settings.

Service Menu

The service menu is password protected to prevent accidental changes being

made to the operation settings, by unauthorised/unqualied persons.

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Mitsubishi Electric EHST20 Series Manuel d'utilisateur Page 13