Gree GTH18K3FI User Manual

U-Match Series DC Inverter Service Manual
87
3.1.7.2 Additional Charge
Refrigerant suitable for a piping length of 5m is charged in the outdoor unit at the factory.
When the piping is longer than 7 m, additional charging is necessary.
For the additional amount, see Table 3-2-3.
Table 3-2-3
Item
Model
Standard Pipe Length
Unnecessary Charge
Pipe Length
Additional Refrigerant
Amount for Extra Pipe
09~18k
5.0m
≤
7.0m
30 g/m
24~42k
5.0m
≤
7.0m
60 g/m
48~60k
7.5m
≤
9.5m
60 g/m
When the height difference between the indoor unit and outdoor unit is larger than 10 meters, an oil
bend should be employed for every 6 meters.
Oil bend
Oil bend
Indoor
Outdoor
6m
Figure 3-2-5
3.2 Specification of Connection Pipe
Table 3-2-4
Item
Model
Size of Fitting Pipe(Inch)
Max. Pipe
Length
(m)
Max. Height Difference
between Indoor Unit and
Outdoor Unit (m)
Drainage pipe(Outer
Diameter × wall thickness)
(mm)
Liquid
Gas
GUHD09NK3FO
1/4
3/8
20
15
Φ17×1.75
GUHD12NK3FO
1/4
3/8
20
15
Φ17×1.75
GUHD18NK3FO
1/4
1/2
20
15
Φ17×1.75
GUHD24NK3FO
3/8
5/8
30
15
Φ17×1.75
GUHD30NK3FO
3/8
5/8
30
15
Φ17×1.75
GUHD36NK3FO
3/8
5/8
30
15
Φ17×1.75
GUHD42NK3FO
3/8
5/8
50
30
Φ17×1.75
GUHD48NK3FO
3/8
5/8
50
30
Φ17×1.75
GUHD36NM3FO
3/8
5/8
30
15
Φ17×1.75
GUHD42NM3FO
3/8
5/8
50
30
Φ17×1.75
GUHD48NM3FO
3/8
5/8
50
30
Φ17×1.75
GUHD60NM3FO
3/8
3/4
50
30
Φ17×1.75
The connection pipe should be insulated with proper water-proof insulating material.
The pipe wall thickness shall be 0.5-1.0 mm and the pipe wall shall be able to withstand the
pressure of 6.0 MPa. The longer the connecting pipe, the lower the cooling and heating effect performs.

Gree GTH18K3FI Specifications

General

Brand	Gree
Model	GTH18K3FI
Category	Air Conditioner
Language	English