Installation
'10 • HM-T-149A
75
Start-up and inspection
Preparations
Connect outdoor and indoor unit (refrigerant pipe and wiring)
and connect indoor unit to the climate system.
Filling the climate system
1. Ensure that the pressure gauge (BP5) is visible.
2. Ensure the valve to expansion vessel is closed (HMS140V only).
3. Connect a hose to the filling valve (QM1) and open the
valve to ll the system.
4. After a while the pressure gauge (BP5) will show rising
pressure.
5. When the pressure has reached about 2.5 bar a mix of air
and water starts to emerge from the safety valve (FL2).
Close the lling valve (QM1).
6. Open the valve to expansion vessel when air vent is
completed (HMS140V only).
<HMA100V, HMA100VM>
Venting the climate system
1. Vent indoor unit through the safety valve (FL2) and the rest
of the heating system through the relevant venting valves.
2 . Open the valve to expansion vessel when air vent is
completed. (HMS140V only)
3. After opening the valve, vent indoor unit through venting
valve on indoor unit to bleed rest of air ompletely.
(HMS140V only)
Keep topping up and venting until all air has been removed and
the correct pressure has been obtained.
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