Connecting Up And Removing Air In The Circuit - Samsung AC052HBMPKH Manual

Connecting up and removing air in the circuit

AA
• When installing, make sure there is no leakage. When recovering the refrigerant, ground the compressor first
before removing the connection pipe. If the refrigerant pipe is not properly connected and the compressor
works with the service valve open, the pipe inhales the air and it makes the pressure inside of the refrigerant
cycle abnormally high. It may cause explosion and injury.
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 either reduce cooling/heating capacity or lead to a malfuction. Refrigerant for air purging is not charged in the
outdoor unit. Use Vacuum Pump as shown at the right figure.
1. Connect each assembly pipe to the appropriate valve on the outdoor unit and tighten the flare nut.
2. Referring to the illustration opposite, tighten the flare nut on section B first manually and then with a torque wrench,
applying the following torque.
Outer Diameter (D)
ø6.35 mm(1/4")
ø9.52 mm(3/8")
ø12.70 mm(1/2")
ø15.88 mm(5/8")
ø19.05 mm(3/4")
3. Connect the charging hose of low pressure side of manifold gauge to the
packed valve having a service port as shown at the figure.
• Make the electrical connection and leave the system into "stand by
mode". Do not turn on the system.
This is necessary to speed up vacuum operation (full OPEN position of
Electronic Expansion Valve - EEV -).
4. Open the valve of the low pressure side(A) of manifold gauge
counterclockwise.
5. 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.
 Make sure that pressure gauge shows -0.1MPa(-76cmHg) after about 10
minutes. This procedure is very important to avoid a gas leak.
 Turn off the vacuum pump.
 Remove the hose of the low pressure side of manifold gauge.
6. Set valve cork of both liquid side and gas side of packed valve to the open position.
7. 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.
8. Check for gas leakage.
 At this time, especially check for gas leakage from the 3-way valve's stem
nuts(A port), and from the service port cap.
• Connect the indoor and outdoor units using pipes with flared connections (not supplied). For the lines, use insulated,
unwelded, degreased and deoxidized copper pipe, (Cu DHP type to ISO 1337 or UNI EN 12735-1), s uitable for
operating pressures of at least 4200kPa and for a burst pressure of at least 20700kPa. Copper pipe for hydro-sanitary
applications is completely unsuitable.
• For sizing and limits (height difference, line length, max. bends, refrigerant charge, etc.) see "Connecting refrigerant
pipe section".
20
Torque (N•m)
14~18
34~42
49~61
68~82
100~120
Outdoor unit
A (Gas)
B (Liquid)
Vacuum
 The designs and shape are subject to
change according to the model.
B(liquid)
C
D
pump
A(gas)