HXHD125A7V1B
VRVIII system indoor unit
4PW62584-1A – 11.2010
Installation manual
15
Precautions when connecting field piping and regarding
insulation
The complete water circuit, inclusive all piping, must be insulated to
prevent reduction of the heating capacity.
If the indoor ambient temperature is higher than 30°C and the
humidity is higher than RH 80% then the thickness of the insulation
materials should be at least 20 mm in order to avoid condensation on
the surface of the insulation.
Fix the indoor unit refrigerant connections
1
Support plate
2
Stop valve
3
To outdoor unit
■
Finalise the refrigerant piping work (connect the prepared
refrigerant piping to the piping coming from the outdoor unit).
Refer to the above cautions for brazing and to the outdoor unit
installation manual.
Close the unit
1
Put the sound bottom plate at the bottom of the unit and fix it
with the appropriate screws.
NOTICE
■
Consider carefully the installation location of the
flexible water inlet pipe.
■
According to the direction of the water flow, the water
filter must be positioned as shown in the figure.
■
Provide sufficient space allowing easy access to
clean the water filter and regular operation check of
the safety valve.
■
Provide a flexible hose for pressure relief valve blow-
off (field supply).
■
Consider to support the water inlet pipe and water
outlet pipe so not to stress the field piping.
NOTICE
It is very important to keep good visibility of the
manometer. The position of the manometer can be
changed as shown in the figure below. Make sure that the
capillary tube does not come in contact with sharp edges
and prevent bending of the capillary tube as much as
possible.
■
Change the position of the manometer when piping is
on the left side of the unit
■
Mounting of the manometer against a wall (the 2
screws are field supply).
2
3
1
2
3
1
2x
2x
INFORMATION
For servicing purposes, it is needed to be able to evacuate
the refrigerant circuit. Therefore, stop valves are foreseen
as accessories.
These stop valves must be installed near to the unit, and
on an accessible place (when service is needed the stop
valves need to be closed and equipment for recovery/
vacuuming has to be connected).
Decide where to install the stop valves and position the
stop valves on the wall by using the support plate.
INFORMATION
Only 2 pipes (liquid and HP/LP gas pipe) need to be
connected.
2
1
3 3
1
2
2x
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