Installation manual

38GL_M…G / 38YY(S)_M…G
R-410A
GB - 17
ENGLISH
햲 Outdoor unit
햳 Circuit A compressor
햴 Circuit B compressor
햵 Outdoor unit coil
햶 Filter
햷 Expansion device (Capillary)
햸 Expansion device (Accurater)
햹 Distributor
햺 Solenoid valve
햻 Service valve
햽 Indoor unit coil A1
햾 Indoor unit coil A2
햿 Indoor unit coil B1
헀 Indoor unit coilB2
헁 Indoor unit coil A
헂 Indoor unit coil B
햴
햲
헁
헂
햶햸
햻
햵
햳
38GL2M12G
햳
햲
햾
햶햷
햹
햺
햷
햻
햵
햽
햴
햳
햲
헂
햽
햾
햶햷
햹
햺
햷
햻
햵
햸
햶
38GL3M21G
Pump Down and check the refrigerant charge
Pump Down
Pump down is an operation intended to collect all the system
refrigerant in the outdoor unit.
This operation must be carried out before disconnecting the
refrigerant tubing in order to avoid refrigerant loss to the
atmosphere, if it becomes necessary to disconnect the
refrigerant connections for unit repair, removal or disposal; in
this case, after removal, unit must be delivered to an
appropriate disposal centre or the original dealer.
Shut off the liquid valve with the Allen wrench.
Turn the system on in cooling with fan operating at high velocity.
(Compressor will immediately start, provided 3 minutes have
elapsed since the last stop).
After 2 minutes of operation, shut the suction valve with the same
wrench.
Turn the system off and switch mains supply off.
Disconnect tubing.
After disconnection, protect valves and tubing ends from dust.
Check the refrigerant charge
• This check becomes necessary after any refrigerant leak due to
incorrect connection, or after replacement of the compressor.
• The best method to correctly charge refrigerant is to
completely empty the refrigerant circuit using refrigerant
recovery equipment.
Then charge the exact quantity of refrigerant according to the
data shown on the unit nameplate, using a balance
(see page 8).
• R-410A refrigerant cylinders contain a dip tube which allows
liquid refrigerant to flow from the cylinder in an upright
position.
Charge R-410A units with cylinder in upright position and a
commercial-type metering device in manifold hose in order to
vaporize the liquid refrigerant before it enters in the unit.
Charge refrigerant into suction-line.
Refrigerant charge control
38GL2M18G - 38GL2M24G - 38GL2M36G - 38GL2M48G
Gas
Liquid + Gas
Liquid