'10 • HM-T-149A
22
“Extra hot water” can be activated in three different
ways:
1.
Periodic time based extra hot water
Interval between extra hot water operation is selected
in Menu 1.7. Menu 1.8 shows when the next extra hot
water operation is due.
The increased temperature is maintained by the
electric heater for one hour..
2.
Schedule time based extra hot water
The start and stop times for the day of the week when
the extra hot water operation is required are set in the
sub menus to Menu 7.4.0.
The increased temperature is maintained by the
electric heater for the selected period.
3.
Temporary extra hot water
Extra hot water operation starts when Extra hot water
button is pressed, and it is kept for 3 hours. The
operation is cancelled when the button is pressed
again during the period.
The increased temperature is maintained by the
electric heater until the period of time has expired.
Maintenance
Indoor unit and outdoor unit require minimal maintenance after
commissioning.
Hydrolution contains many components and is why monitoring
functions are integrated to help you.
If something abnormal occurs, a message appears about
malfunctions in the form of different “alarm” texts in display.
Checking the safety valves in indoor unit
Indoor unit has been equipped with a safety valve for the water
heater as well as a safety valve for the climate system by the
installer.
The climate system’s safety valve
<HMA100V, HMA100VM>
<HMS140V>
MT300
MT500
The climate system’s safety valve (FL2) must be completely
sealed. Checks must be carried out regularly as follows:
■ Open the valve.
■ Check that water ows through the valve. If this does not
happen, replace the safety valve.
■ Close the valve again.
■ The heating system may need to be refilled after checking
the safety valve, see the section “Filling the heating system”.
Hot water heater safety valve
The water heater’s safety valve sometimes releases a little
water after hot water usage. This is because the cold water,
which enters the heater to replace the hot water, expands when
heated causing the pressure to rise and the safety valve to open.
Also check the water heater safety valve regularly. The
appearance and location of the safety valve differs between
different installations. Contact your installer for information.
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