27
EDEM
SPLIT-TYPE ROOM AIR CONDITIONER
Open the Low Pressure side of the manifold gauge. Keep the
High Pressure side closed.
Turn on the vacuum pump to evacuate the system.
Run the vacuum for at least 15 minutes, or until the Compound
Meter reads -76cmHG (-10 Pa).
Close the Low Pressure side of the manifold gauge, and turn off
the vacuum pump.
Wait for 5 minutes, then check that there has been no change
in system pressure.
If there is a change in system pressure, refer to Gas Leak Check
section for information on how to check for leaks. If there is no
change in system pressure, unscrew the cap from the packed
valve (high pressure valve).
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.
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.
Remove the charge hose from the service port.
Using hexagonal wrench, fully open both the high pressure and
low pressure valves.
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.
3
4
5
6
7
8
9
10
11
12
13
NOTE
On adding refrigerant
Some systems require additional charging depending on pipe
lengths. The standard pipe length varies according to local
regulations. For example, in North America, the standard pipe
length is 7.5m (25ft).
In other areas, the standard pipe length is 5m (16ft). The additional
refrigerant to be charged can be calculated using the following
formula:
CAUTION
DO NOT mix refrigerant types.
CAUTION
Open valve stems gently
When opening valve stems, turn the hexagonal wrench until it
hits against the stopper. Do not try to force the valve to open
further.
ADDITIONAL REFRIGERANT PER PIPE LENGTH
Connective Pipe
Length (m)
Air Purging
Method
Additional Refrigerant
A
/
N
p
m
u
P
m
u
u
c
a
V
h
t
g
n
e
l
e
p
i
p
d
r
a
d
n
a
t
S
<
> Standard pipe
length
Vacuum Pump
Liquid Side: Ø 6.35 (ø 0.25”)
R22:
(Pipe length – standard length) x 30g/m
(Pipe length – standard length) x 0.32oZ/ft
Inverter R410A:
Fixed-frequency R410A:
Inverter R410A:
Fixed-frequency R410A:
(Pipe length – standard length) x 15g/m
(Pipe length – standard length) x 0.16oZ/ft
(Pipe length – standard length) x 20g/m
(Pipe length – standard length) x 0.21oZ/ft
(Pipe length – standard length) x 40g/m
(Pipe length – standard length) x 0.42oZ/ft
Liquid Side: Ø 9.52 (ø 0.375”)
R22:
(Pipe length – standard length) x 60g/m
(Pipe length – standard length) x 0.64oZ/ft
(Pipe length – standard length) x 30g/m
(Pipe length – standard length) x 0.32oZ/ft
Summary of Contents for EDEM
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