Additional Charge - McQuay SLC Serie Manual De Instalación

Allen Key
Service Port
Liquid Side
Indoor Unit
Gas Side
Open
Vacuum
Pump Hi
Low
Close

Additional Charge

The refrigerant is pre-charged in the outdoor unit. If the
piping length is less than 5m, then additional charge after
vacuuming is not necessary. If the piping length is more
than 5m, then use the additional charge valve as indicated
in the table below.
Additional Charge In Gram
R22/R407C Charge (g)
Model
7m
20D / 20DR 30/50 75/125
25D / 25DR 76/100 190/250
30D / 30DR 100/100 250/250
40D / 40DR 100/100 250/250
50D / 50DR 100/100 250/250
R410A Charge (g)
Model
7m
20D / 20DR 27/45 67/112
25D / 25DR 68/90 171/225
30D / 30DR 90/90 225/225
40D / 40DR 90/90 225/225
50D / 50DR 90/90 225/225
Refrigerant Piping
Flare Nut
Outdoor Unit
3 Ways Valve
Outdoor Unit
Discharge Valve
Close
Suction Valve
Close
10m 15m 20m
150/250 225/375
380/500 570/750
500/500 750/750
500/500 750/750
500/500 750/750
10m 15m 20m
135/225 202/337
342/450 513/675
450/450 675/675
450/450 675/675
450/450 675/675
Charge Operation
This operation must be done by using a gas cylinder and a
precise weighing machine. The additional charge is
topped-up into the outdoor unit using the suction valve via
the service port.
•
Remove the service port cap.
• Connect the low pressure side of the charging gauge to
the suction service port center of the cylinder tank and
close the high pressure side of the gauge. Purge the air
from the service hose.
• Start the air conditioner unit.
• Open the gas cylinder and low pressure charging valve.
• When the required refrigerant quantity is pumped into
the unit, close the low pressure side and the gas cylinder
valve.
• Disconnect the service hose from service port. Put back
the service port cap.
Liquid Side
Indoor Unit
Gas Side
Check
Valve
Low
Open
1-11
Outdoor Unit
Discharge Valve
Open
Suction Valve
Open
Hi
Close