V 05/15
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APPENDICES
Piping configuration
1. Standard connecting tube length:5, 7.5, 8 m.
2. Minimum connecting tube length: 3 m.
3. Maximum connecting tube length and maximum height difference:
Capacity
Maximum
connecting tube
length
Maximum
height
difference
9000 Btu/h
15 10
12000 Btu/h
20 10
18000 Btu/h
25 10
24000 Btu/h
25 10
Warning! Note the additional charge on the data plate affixed to the outdoor unit.
Additional oil and refrigerant charging
• If the length of the connecting pipe is increased by 10 m compared to the standard length,
add 5 ml of refrigeration oil for every 5 m of pipe added.
• Method for calculating the amount of additional refrigerant charge (liquid pipe): amount of
additional refrigerant charge = additional length of liquid pipe x additional amount of
refrigerant charge per metre.
Connecting pipe diameter Additional refrigerant
Liquid pipe (mm) Gas pipe (mm) (g/m)
6.35 9.52 or 12.7
20
6.35 15.88
50
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