14SEER AIR HANDLER SYSTEM TECHNICAL MANUAL
2. Vacuum Dry and Leakage Checking
2.1 Vacuum Dry:
use vacuum pump to change the moisture (liquid) into steam (gas) in the pipe and
discharge it out of the pipe to make the pipe dry. Under one atmospheric pressure, the boiling point of
water(steam temperature) is 100
℃
. Use vacuum pump to make the pressure in the pipe near vacuum
state, the boiling point of water falls relatively. When it falls under outdoor temperature, the moisture in
the pipe will be vaporized.
2.2 Vacuum dry procedure
There are two methods of vacuum dry due to different construction environment: common vacuum dry,
special vacuum dry.
①
. Common vacuum dry procedure
●
Vacuum dry (for the first time)---connect the all-purpose detector to the inlet of liquid pipe and gas pipe,
and run the vacuum pump more than two hours (the vacuum pump should be below -755mmHg)
●
If the pump can’t achieve below -755mmHg after pumping 2 hours, moisture or leakage point will still
exist in the pipe. At this time, it should be pumped 1 hour more.
●
If the pump can’t achieve -755mmHg after pumping 3 hours, please check if there are some leakage
points.
●
Vacuum placement test: place 1 hour when it achieves -755mmHg, pass if the vacuum watch shows no
rising. If it rises, it shows there’s moisture or leakage point.
●
Vacuuming from liquid pipe and gas pipe at the same time.
●
Sketch map of common vacuum dry procedure.
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Summary of Contents for CTV14CN018A
Page 1: ...Technical Manual R410A 60Hz 14 SEER Top Discharge Heat Pump Outdoor 1 ...
Page 9: ...14SEER AIR HANDLER SYSTEM TECHNICAL MANUAL 2 Dimension 9 ...
Page 11: ...14SEER AIR HANDLER SYSTEM TECHNICAL MANUAL 4 Wiring Diagrams 18K 24K 30K 36K 42K 48K 11 ...
Page 12: ...14SEER AIR HANDLER SYSTEM TECHNICAL MANUAL 60K 12 ...
Page 17: ...14SEER AIR HANDLER SYSTEM TECHNICAL MANUAL 1 Dimension 17 ...
Page 18: ...14SEER AIR HANDLER SYSTEM TECHNICAL MANUAL 2 Service Space 18 ...
Page 19: ...14SEER AIR HANDLER SYSTEM TECHNICAL MANUAL 3 Wiring Diagrams SEER 14 Cooling only 19 ...
Page 39: ...14SEER AIR HANDLER SYSTEM TECHNICAL MANUAL 3 9 High exhaust temperature protection 39 ...
