Mitsubishi Electric CITY MULTI PURY-P-YNW-A2 Installation Manual page 31

9-5-1. Removing the pinched connecting pipes
The unit is shipped with the pinched connecting pipes attached to the high-pressure and low-pressure side service
valves to prevent gas leakage.
Take the following steps ① through ③ to remove the pinched connecting pipes before connecting refrigerant pipes to
the outdoor unit.
① Check that the service valves are fully closed (turned clockwise all the way).
② Remove the gas in the pinched connecting pipes, and drain out all the refrigerant oil. (See Ⓓ below.)
③ Remove the pinched connecting pipes. (See Ⓔ below.)
<A> <B>
Ⓒ
Ⓓ
Opening or closing direction of the valve
(high-pressure or low-pressure/brazed)
Open
Close
WT09973X01
<A> Refrigerant service valve (high-pressure/brazed)
<B> Refrigerant service valve (low-pressure/brazed)
Valve shaft
Ⓐ
Ⓐ
The unit is shipped with the valve closed. Keep the valve closed while connecting pipes or
evacuating the system. Open the valve upon completion of this work.
Turn the shaft counterclockwise as far as it will go (90˚) to open the valve, and clockwise to
close it.
Ⓑ
Ⓑ Service port
Through the service ports, you can charge refrigerant, remove the gas in the pinched
connecting pipes, or evacuate the system.
Ⓔ
Cap
Ⓒ
Remove the cap before turning the shaft. Put the cap back on upon completion of all work.
Severed section of the pinched connecting pipe
Ⓓ
Brazed section of the pinched connecting pipe
Ⓔ
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