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Installation
'10 • HM-T-149
Start-up and inspection
Checking external heat source controlled by
the signal from indoor unit
1. Check if the signal wire is connected as instructed.
2. Select“Ext.1step”inMenu9.2.8.
3. Selectoperatingmode“Add.heatonly”byholdinginthe
operating mode button for 7 seconds.
4. Ensure that the max temperature from the external heat
source does not exceed 65 °C.
5. Select operatingmode“Auto”by pressing the operating
mode button.
Checking external heat source controlled
independently
1. Adjust the start temperature of the external heat source so
that it starts earlier than the internal electric heater.
2. Adjust the stop temperature of the external heat source so
that the temperature in indoor unit does not exceed 65 °C.
Inspection of the installation
Current regulations require the heating installation to be
inspected before it is commissioned. The inspection must be
carried out by a suitably qualified person and should be
documented. Use the check list on the following page. The
above applies to closed heating systems.
Do not replace any part of the split-system without carrying
out new checks.
Cleaning the particle filter
Cleantheparticlelter(HQ1)afterinstallation.
Secondary adjustment
Air is initially released from the hot water and venting may be
necessary. If gurgling sounds can be heard from HM270V or
from the climate system, the entire system will require
additional venting.
Note!Usebleedvalve(QM20),anyexternalbleedvalvesas
well as safety valve (FL2). The latter must be operated
carefully as it opens quickly. When the system is stable (correct
pressure and all air eliminated) the automatic heating control
system can be set as required.
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