Air purging refrigerant refill – Samsung AM27A1C13 User Manual
Page 41
C
OMPLETING THE
I
NSTALLATION
Air purging
Refrigerant refill
1
Check the piping connections.
2
Connect the charging hose of low pressure side of manifold gauge to the
packed valve having a service port (3/8
”
or 1/2
”
Packed valve) as shown
at the right figure.
3
Open the valve of the low pressure side of manifold gauge counter
clockwise.
4
Purge the air from the system using vacuum pump for about 10 minutes.
- Close the valve of the low pressure side of manifold gauge clockwise.
- Remove the hose of the low pressure side of manifold gauge.
5
Set valve cork of both liquid side and gas side of packed valve to the open
position.
6
Mount the valve stem nuts to the 2-way and 3-way valve.
And mount the service port cap to 3-way valve.
7
Check for gas leakage.
- At this time, especially check for gas leakage from the 3-way valve’s
stem nuts, and from the service port cap.
If connecting pipe of more than 10 metres is installed, additional
refrigerant should be charged by extra metre. You don’t have to
charge additional refrigerant up to 10 metres of connecting pipe.
1
Remove the valve stem cap and service port of 3-way valve.
2
Connect the charging hose of low pressure side of manifold gauge to the
packed valve having a charging port (3/8
”
or 1/2
”
Packed valve).
3
Operate the unit at the cooling mode.
4
Slowly open the valve of the low pressure side of manifode gauge counter-
clockwise until the low pressure of manifold gauge indicates 4.8 to 5.5kg/cm
2
(68 to 78 PSI) at the high cool operation (1-unit operation) and the standard
temperature of indoor 26.7°C (80°F) and outdoor 35°C (95°F).
It is recommend that refrigerant should be slowly put in. If the refrigerant is
put in too quickly, compressor will be damaged.
5
Stop operation of the air conditioner.
6
Disconnect the charge hose of manifold gauge.
7
Close the cap of each valve.
The air in the indoor unit and in the pipe must be purged. If air remains in the
refrigeration pipes, it will affect the compressor, reduce to cooling capacity and could
lead to a malfunction. Refrigerant for air purging is not charged in the outdoor unit.
Use Vacuum Pump as shown at the right figure. Each unit must be purged in turn.
C
C
C
C
A
A
A
A
U
U
U
U
T
T
T
T
II
II
O
O
O
O
N
N
N
N
Formulas
A-unit : 10g x (L
a
- 10) / m (L
a
: the length of A-unit’s pipe)
B-unit : 10g x (L
b
- 10) / m (L
b
: the length of B-unit’s pipe)
Stem cap
Service port
Valve stem
Liquid side
Gas side
A
B
Indoor
A-unit
Indoor
B-unit
Vacuum Pump
E-
41
ENGLISH