Samsung MH052FXEA2 - Product Specifications (Continued); Outdoor Unit Specifications Overview

E-17
ENGLISH
C OMPLETING THE I NSTALLATION
Connecting Up and Purging the Circuit
◆ MH068FXEA4 / MH080FXEA4
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/heating capacity and
could lead to a malfuction. 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.
CC
CC
AA
AA
UU
UU
TT
TT
II
II
OO
OO
NN
NN
◆ MH18VP2X / MH19VP2X / MH052FXEA2
Stem cap
Service port
Valve stem
A
B
C
D
Vacuum
Pump
Indoor
A-unit
Indoor
B-unit
Vacuum
Pump
Service port
Valve stem
Stem cap
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
” service valve) as shown at the
figure.
3 Open the valve of the low pressure side of manifold gauge
counter-clockwise.
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.
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.
-
Make sure that pressure gauge show -0.1MPa(-76cmHg) after about
10 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.
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).
3 Open the valve of the low pressure side of manifold gauge
counter clockwise.
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.
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.