Opening Outdoor Unit Valves; Note On Adding Refrigerant - Kaden KS09 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-condensable 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.

Note on adding refrigerant

Some systems require additional charging depending on pipe lengths. The standard pipe length varies according to local
requirements. The additional refrigerant to be charged can be calculated using the following formula:
Additional refrigerant per pipe length
Connective Pipe Length (m)
Standard pipe length is 20m
CAUTION
DO NOT mix refrigerant types.
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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.
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.
Evacuation Method
Vacuum Pump
Inverter R410A:
(Pipe length – standard
Flare nut
Valve
Valve
body
Fig. 6.2
stem
Additional Refrigerant
Liquid Side:
Ø 6.35 (ø 0.25") Ø 9.52 (ø 0.375")
Inverter R410A:
(Pipe length – standard
length) x 15g/m length) x 30g/m
Cap
Liquid Side:
5/09/2017 9:08 AM