INVENTOR u-match on/off, Service Manual

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U-MATCH AIR CONDITIONERS INSTALLATION
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connecting pipe is needed to lengthen, appropriate amount of refrigerant should be added.
How much refrigerant should be added for every meter extension refers to the following table.
Allowable maximum pipe length is 30m.
‹
If height difference between indoor unit and outdoor unit exceeds 10m in installation of air
conditioner, an oil return bend must be mounted at an interval of 6m.
‹
If heights of indoor unit and outdoor unit are different, pipes should be laid out with reference
to Figure 3-2-1.
Refrigerant pipe (thin)
- - - - - - Air pipe (large)
Figure 3-2-1
3.3 Specification of Connection Pipe
Model
External Diameter
Maximum
Length
of Connection
Pipe
Maximum Difference
in Height between
Outdoor and Indoor
Unit
Additional
Charge
of
Refrigerant
Gas Pipe Liquid Pipe
(m) (m) (g/m)
ULS-09
3/8
ʾ
1/4
ʾ 20 15 15 ULS-12
1/2
ʾ
ULS-18
ULS-24 5/8
ʾ
3/8
ʾ
30 15 60
ULS-36 3/4 ʾ 1/2 ʾ 50 30 120
Refrigerant pipes
Air pipe
Outdoor unit
Oil loop of air pipe
Oil loop of air pipe
An oil loop is arranged at an
interval of 4-6m.
indoor unit