H P 2 1 0 0 / 2 7 0 0 G r e e n
P a g e
3 7
/ 4 0
Air purging with vacuum pump
1.
Preparation
a.
Check that each tube (both liquid and gas) between the water and condensing units
have been properly connected and all wiring for the test run has been completed.
b.
Remove the service valve caps from both the gas and the liquid side on the
condensing unit.
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 e
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 pu
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
Minimum 10 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
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.
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
V e r s i o n :
Air purging with vacuum pump
Check that each tube (both liquid and gas) between the water and condensing units
have been properly connected and all wiring for the test run has been completed.
Remove the service valve caps from both the gas and the liquid side on the
condensing unit. Please note that both the liquid and the gas side service valves on
the condensing unit are kept closed at this stage. Some heat pumps models have in
their refrigerant circuit only 1 service valve installed.
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
When the desired vacuum is reached, close the "Lo" knob of the manifold valve and
stop the vacuum pump.
With a service valve wrench (inbus wrench), turn the
valve stem of liquid side valve counter-clockwise to fully
Turn the valve stem of gas side valve counter-
clockwise to fully open the valve.
e the charging hoses.
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
compliance with above may and will likely lead
into heat pump’s malfunction, failure or damage.
Such state means complete warranty void and
er; distributor or reseller cannot be
taken responsible in such case for any property or
personal damage or loss.
Water unit
Condensing
unit
Pressure
gauge
Close
Vacuum pump
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
V e r s i o n : 0 1 / 2 0 2 1
H
E
A
T
P
U
M
P
M
I
C
R
O
W
E
L
L
H
P
Check that each tube (both liquid and gas) between the water and condensing units
have been properly connected and all wiring for the test run has been completed.
Remove the service valve caps from both the gas and the liquid side on the
Please note that both the liquid and the gas side service valves on
the condensing unit are kept closed at this stage. Some heat pumps models have in
nd 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
mp. The following table shows the time required
Required time for evacuation when 30 gal/h vacuum pump model is used
Tube length more than 10m
m 15 minutes
When the desired vacuum is reached, close the "Lo" knob of the manifold valve and
Manifold
valve
Open
