13
Installation Instructions
Model
Total Liquid Pipe Length (a+b+c+d)
SKOV2-18
≤10
m
SKOV3-24
≤30
m
SKOV4-28
≤40
m
Refrigerant Charging and Trial Running
● Refrigerant Charging
1. The refrigerant has been charged into the outdoor unit
before shipment, while additional refrigerant still need
be charged into the refrigerant pipe during the field
installation.
2. Check if the liquid valve and the gas valve of the
outdoor unit are closed fully.
3. As shown in the following figure (Fig.10), expel the gas
inside the indoor unit and refrigerant pipe out by the
vacuum pump.
Manometer
Manometer
“LO” knob
“HI” knob
Hose
4. When the compressor is not running, charge the R410a
refrigerant into the refrigerant pipe from the liquid valve
of the outdoor unit (do not do it from the gas valve).
Gas Valve
vacuum pump
Fig.10
● Calculation of the Additional Refrigerant Charging
1. Refrigerant Charge in the Outdoor Unit before Shipment
Table 8
Model
SKOV2-18
SKOV3-24
SKOV4-28
Refrigerant Charge(kg)
1.4
1.9
2.4
Notes:
(1). The refrigerant charge mentioned in the table above is not include those charged
additionally in the indoor unit and the refrigerant pipe.
(2). The amount of the additional refrigerant charge is dependent on the diameter and length
of the liquid refrigerant pipe which is decided by the actual yield installation requirement.
(3). Record the additional refrigerant charge for future maintenance.
2. Calculation of the Additional Refrigerant Charge
If the total refrigerant pipe length (liquid pipe) is smaller than listed in the table below, no
additional refrigerant will be charged.
Table 9
Additional refrigerant charge= ∑ Extra Liquid Pipe Length×22g/m (liquid pipe
Φ6.35mm)
Notes:
If the total refrigerant pipe length is larger than that listed in the table above, the additional
refrigerant for the extra length of the pipe needs to be charged as per 22g/m.