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U s e r ´ s a n d i n s t a l l a t i o n m a n u a l
D R Y S I R E N
P a g e 4 4 o f 6 8
V e r s i o n : 0 1 / 2 0 1 8
SW
IM
M
IN
G
P
O
O
L
D
EH
U
M
ID
IF
IE
R
DR
Y
S
IR
E
N
a.
Check that each tube (both suction and discharge) between the ceiling and
compressor units have been properly connected and all wiring for the test run has
been completed.
b.
Remove the service valve caps from the suction side on the compressor unit. Please
note that both the suction and the discharge side service valves on the compressor
unit are kept closed at this stage.
2.
Vacuum test
a.
With a service valve wrench (imbus wrench), turn the suction and discharge valve
counter-clockwise to fully open both valves.
b.
Connect the charge hose end described in the preceding steps to the vacuum pump
to evacuate the piping. 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 20 minutes
Minimum 30 minutes
c.
When the desired vacuum is reached, close the “Lo” knob of the manifold valve and
stop the vacuum pump.
d.
Close the valve on charging hose at vacuum pump.
3.
Refrigerant filling
a.
Now remove the vacuum pump and bring the refrigerant bottle and charging scales.
Connect the disconnected hose (point d above) to refrigerant bottle (liquid side).
Place the bottle on charging scales and turn the scales on. Please make sure no
object, pipe, cable or other touches the bottle or charging scales. Otherwise weight
misreading may occur.
b.
Please close the valve at hose at suction side of compressor unit.
c.
Open the manifold ‘Lo’.
d.
Open the valve at hose at refrigerant bottle.
e.
Open the bottle’s valve.
f.
Zero the charging scales out.
g.
Open the valve at hose at suction side of compressor unit. Please mind that the
compressor unit is still off.
h.
Wait until the unit sucks necessary amount of refrigerant. Charging scales typically
shows the weight as negative number (how much was taken out from the bottle).
i.
Sometimes the necessary amount of refrigerant is not sucked into the system by
itself. The reason can be:
room air temperature / bottle temperature too low
Low bottle pressure (low amount of gas in bottle)
Restriction in copper pipes
