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| Kaden Installation Manual
Preparations and precautions
Air and foreign matter in the refrigerant circuit can cause
abnormal rises in pressure, which can damage the air
conditioner, reduce its efficiency, and cause injury. Use a
vacuum pump and manifold gauge to evacuate the refrigerant
circuit, removing any non-condensible gas and moisture from
the system.
Evacuation should be performed upon initial installation and
when unit is relocated.
Before performing evacuation
✓
Check to make sure that both high pressure and
low pressure pipes between the indoor and outdoor
units are connected properly in accordance with the
Refrigerant piping connection section of this manual.
✓
Pressure test the interconnecting pipes.
✓
Check to make sure all wiring is connected properly.
Opening outdoor unit valves
1. Insert hexagonal wrench into the packed valve (high-
pressure valve) and open the valve by turning the wrench
in a 1/4 counterclockwise turn. Listen for gas to exit the
system, then close the valve after 5 seconds.
Fig. 8.2
2. Watch the pressure gauge for one minute to make sure that
there is no change in pressure. The pressure gauge should
read slightly higher than atmospheric pressure.
3. Remove the charge hose from the service port.
4. Using hexagonal wrench, fully open both the high pressure
and low pressure valves.
5. Tighten valve caps on all three valves (service port, high
pressure, low pressure) by hand. You may tighten it further
using a torque wrench if needed.
Note on adding refrigerant
Some systems require additional charging depending on
pipe lengths. The additional refrigerant to be charged can be
calculated using the below.
Liquid side diameter
Ø
9.52mm/3/8"
Total pipe length -
Standard pipe length x
24g/m
Refrigerant type
R32
CAUTION
• Refrigerant charging must be performed after wiring,
vacuuming, and the leak testing.
•
Do not
exceed the maximum allowable quantity of
refrigerant or overcharge the system. Doing so can
damage the unit or impact its functioning.
• Charging with unsuitable substances may cause
explosions or accidents. Ensure that the appropriate
refrigerant is used.
• Refrigerant containers must be opened slowly. Always
use protective gear when charging the system.
•
Do not
mix refrigerant types.
Flare nut
Valve body
Valve stem
Cap