ENGLISH-20
Connecting up and removing air in the circuit
5 .
Purge the air from the system using vacuum pump for about 10 minutes.
X
f
Close the valve of the low pressure side of manifold gauge clockwise .
X
f
Make sure that pressure gauge shows -0 .1MPa(-76cmHg) after about 10
minutes . This procedure is very important to avoid a gas leak .
X
f
Turn off the vacuum pump .
X
f
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.
X
f
At this time, especially check for gas leakage from the 3-way valve’s stem
nuts(A port), and from the service port cap .
B(liquid)
A(gas)
• 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” .
CAUTION
CAC_Global Duct Latin America_IM_EN_04680A-02.indd 20
2014-09-04 오전 9:17:27