Adding Refrigerant - Samsung RJ040F2HXEB Installation Manual

A C onnecting up and purging the circuit
◆ RJ060F3HX ** /RJ070F4HX ** /RJ080F4HX **
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 (5/8" Packed valve) as shown at the
figure (Value stem: 1/2" - 20UNF).
WARNING
◆ Make the electrical connection and leave the system into "stand
by mode". Do not turn on the system! This is necessary for better
vacuum operation (full OPEN position of Electronic Expansion
Valve - EEV -).
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 30 minutes.
- Close the valve of the low pressure side of manifold gauge clockwise.
- Make sure that pressure gauge show -0.1MPa(-76cmHg) after about
30 minutes. This procedure is very important in order to avoid gas leak.
- Turn off the vacuum pump.
- 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 and the service port cap to the valve, and
tighten them at the torque of 183kgf•cm with a torque wrench.
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.

Adding refrigerant

If you install the excessive length of pipe, add additional refrigerant as 10g per unit meter ;
refer to the table below.
Refer to the Service Manual for more details on this operation.
Model Total connecting pipe length (L)
LT ≤ 15m
RJ040F2HX **
LT>15m
LT ≤ 20m
RJ050F2HX **
LT>20m
LT ≤ 30m
RJ060F3HX **
LT>30m
LT ≤ 40m
RJ070/080F4HX **
LT>40m
Charging the refrigerant under conditions of liquid by using a liquid pipe
R410A 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.
1. 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.
• If R410A 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.
20
Adding refrigerant
Chargeless
(LT- 15m)x10g
Chargeless
(LT- 20m)x10g
Chargeless
(LT- 30m)x10g
Chargeless
(LT- 40m)x10g
Cylinder without siphon
Charge the refrigerant turning the cylinder
upside down.
A
B
C
Vacuum
Pump
Valve stem
Stem cap
Service port