I n s t a l l a t i o n a n d u s e r m a n u a l
H P 9 0 0 / 1 2 0 0 S P L I T P R E M I U M
V e r s i o n : 0 1 / 2 0 1 7
P a g e
2 2
/ 3 6
HEAT P
U
M
P
MI
C
R
O
W
E
L
L
HP
the condensing unit are kept closed at this stage. Some heat pumps models have in
their refrigerant circuit only 1 service valve installed.
2.
Lead test by vacuuming
a.
Connect the charge hose end described in the preceding steps to the vacuum pump
to evacuate the tubing and water unit. Confirm the "Lo" knob of the manifold valve is
open. Then, run the vacuum pump. The operation time for evacuation varies with
tubing length and capacity of the pump. The following table shows the time required
for evacuation when using a vacuum pump of 30 gal/h power.
Required time for evacuation when 30 gal/h vacuum pump model is used
Tube length less than 10m
Tube length more than 10m
Minimum 10 minutes
Minimum 15 minutes
b.
When the desired vacuum is reached, close the "Lo" knob of the manifold valve and
stop the vacuum pump.
Finishing the job
1.
With a service valve wrench (inbus wrench), turn the
valve stem of liquid side valve counter-clockwise to fully
open the valve.
2.
Turn the valve stem of gas side valve counter-
clockwise to fully open the valve.
3.
Remove the charging hoses.
4.
Put service valve caps back at both gas and liquid side
service valves and fasten them tight. This completes air
purging with a vacuum pump and refrigerant works.
Please note that above flaring and refrigerant work
must be performed correctly with utmost care. Any
non-compliance with above may and will likely lead
into heat pump’s malfunction, failure or damage.
Such state means complete warranty void and
manufacturer; distributor or reseller cannot be
taken responsible in such case for any property or
personal damage or loss.
4.7
Seaside installation
Some condensing units are installed in locations close to sea or ocean. Please note that condensing
unit should not be installed in areas where corrosive gases, such as acid or alkaline gas, are present
or produced. Do not place the condensing unit where it can be exposed to direct sea wind (salty
wind). This would lead into corrosion. This could result in heat pump malfunction, failure or damage.
In any case you should avoid a direct exposure of sea wind. This can be done with the help of a
windbreak (e.g. small wall). The dimensions of the windbreak should be 1.5 bigger than condensing
Manifold
valve
Water unit
Condensing
unit
Pressure
gauge
Open
Close
Vacuum pump
