Samsung ASHM070VE Service Manual page 22

Operating Instructions and Installation
3-3-2(h) Refrigerant Refill
• Refill the refrigerant according to the criteria for pipeline lengths of the unit A and B as shown in
the right table at the time of initial installation.
• Refill an air-conditioner with refrigerant when refrigerant has been leaked at installing or using.
1. Purge air (for new installation only).
2. Turn the 3-way valve clockwise to close,
connect the pressure gauge (low
pressure side) to the service valve, and
open the 3-way valve again.
3. Connect the tank to refill with Refrigerant.
4. Set the unit to cool operation mode.
5. Check the pressure indicated by the
pressure gauge (low pressure side).
• Standard pressure is should be
4.5~5.5kg/cm 2 in a reqular, high operation
mode. (1-UNIT operating)
6. Open the refrigerant tank and fill with
refrigerant until the rated pressure is
reached.
• It is recommended not to pour the
refrigerant in too quickly, but gradually
while operating a pressure valve.
7. Stop operation of the air conditioner.
8. Close the 3-way valve, disconnect the
pressure gauge, and open the 3-way
valve again.
9. Close the cap of each valve.
3-14
• Piping length and the height
Pipe Size
LIQUID GAS
A-UNIT
1/4" 1/2"
B-UNIT
1/4" 3/8"
C-UNIT 1/4" 3/8"
Additional refrigerant change
( R 2 2 , g )
• When length of the pipe is
over 5m by the unit, you
should charge
the refrigerant Formulas
A-UNIT : 10gx(L1-5)/m
B-UNIT : 10gx(L2-5)/m
(L1:the length of A-unit's
pipe L2:the total length of
B & C-unit's pipe)
INDOOR
A-UNIT
INDOOR
B-UNIT
INDOOR
C-UNIT
3-3-2(i) Flare unt fixing torque
Outter diameter
Fixing Torque
ø6.35(Liquid Side)
ø9.52(Gas Side)
ø12.7(Gas Side)
Max.piping Max
length height
A B
10m 3m
10m 3m
10m 3m
INDOOR UNIT
A
B
OUTDOOR UNIT
Torque (kg-cm)
Final Torque
160 200
300 350
500 550
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