Outdoor unit installation
Installation
'10 • HM-T-149A
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Comfort setting with room sensor
If MH-RG10 is installed, operation mode is chosen not only by
outdoor air temperature but also by room air temperature.
Upper limit of the outdoor air temperature to operate in Heating
mode can be set in Menu 8.2.3 Stop temp Heating.
Lower limit of the outdoor air temperature to operate in Cooling
mode can be set in Menu 8.2.4 Start temp Cooling.
Target room air temperature can be adjusted by turning the
knob on MH-RG10, and it is displayed in Menu 6.3.
For details, see instruction manual for MH-RG10. The below
gure shows an example of mode transition.
Readjusting the default settings
If the required room temperature is not obtained, readjustment
may be necessary.
Cold weather conditions
■ When the room temperature is too low, the “Heating curve”
value is increased in Menu 2.1.2 by one increment.
■ When the room temperature is too high, the “Heating
curve” value is decreased in Menu 2.1.2 by one increment.
Warm weather conditions
■ If the room temperature is low, increase the “Heating curve
offset” setting by one step clockwise.
■ If the room temperature is high, reduce the “Heating curve
offset” setting by one step anti-clockwise.
Heating system 2
If the heating system has two different type of emitter like
radiator and under floor heating, it is possible to set two
different calculated supply temperature. System 1 for higher
supply temperature can be set in Menu 2.1.0, and system 2 for
lower supply temperature can be set in Menu 3.0.
Vacation set back
When you are away from home for a long time, it is possible to
set the target supply water temperature for heating lower than
usual to save energy consumption. Also, it is possible to cancel
hot water operation during the period.
For details, see Menu 7.5.0 Vacation set back.
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