Step 10 Adding Refrigerant (R-410A) - Samsung AJ Series Installation Manual

Outdoor unit
B(Liquid)
A(Gas)
• The designs and shape are subject to change according
to the model.
LEAK TEST WITH NITROGEN (before opening valves)
In order to detect basic refrigerant leaks, before
recreating the vacuum and recirculating the R-410A, it is
the responsibility of the installer to pressurize the whole
system with nitrogen (using a cylinder with pressure
reducer) at a pressure above 580.2 psi (gauge).
LEAK TEST WITH R-410A (after opening valves)
Before opening valves, discharge all the nitrogen into the
system and create vacuum. After opening valves check
leaks using a leak detector for refrigerant R-410A.
Once you have completed all the connections, check for
possible leaks using leak detector specifically designed for
HFC refrigerants.

Step 10 Adding refrigerant (R-410A)

Calculating the quantity of refrigerant to add
The quantity of additional refrigerant is variable according to
the installation situation. Thus, make sure the outdoor unit
situation before adding refrigerant.
If you install the excessive length of pipe, add additional
refrigerant as 0.22 oz per unit ft ; refer to the table below.
Refer to the Service Manual for more details on this operation.
Total connecting
Model Name
pipe length (L)
AJ020TXS3CH
AJ024TXS4CH
(LT) ft
AJ030TXS4CH
AJ036TXJ4CH
AJ036TXS4CH
(LT) ft
AJ048TXJ5CH
DB68-08940A-00_IM_FJM Outdoor_AA_EN.indd 21
Indoor unit
C D
Adding refrigerant
≤ 131.2 ft Chargeless
> 131.2 ft (LT-131.2) ft x 0.22 oz
≤ 164.0 ft Chargeless
> 164.0 ft (LT-164.0) ft x 0.22 oz
Charging the refrigerant under conditions of
liquid by using a liquid pipe
R-410A is a mixed type of refrigerant. It is necessary for
recharging under conditions of liquid. When recharging
refrigerant from the refrigerant cylinder to the
equipment, follow the instructions below.
• Before recharging, check whether the cylinder has
a siphon or not. There are two ways to recharge the
refrigerant.
Cylinder with siphon
siphon
Charge the refrigerant standing
the cylinder upright.
NOTE
• If R-410A refrigerant is charged with gas, the
composition of the charged refrigerant changes and
the characteristics of the equipment vary.
• During the measuring operation of refrigerant quantity
added use an electronic balance. If cylinder doesn't
have syphon, upset it.
Cylinder without siphon
Charge the refrigerant turning
the cylinder upside down.
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2020-01-23 오후 12:38:05