V 11/21
101
APPENDICES
Piping configuration
1. Standard connecting tube length:
5 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
18000Btu/h
25
10
24000Btu/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
16 (9-12-18K)
6,35
12,7
16 (24K)
Safety operation of flammable refrigerant
Qualification requirement for installation and maintenance
All workers who engage with the refrigeration system should bear the valid certification
awarded by the authoritative organization, and the qualification recognized by the industry
for dealing with the refrigeration system.
The refrigeration system can only be repaired following the methods suggested by the
equipment’s manufacturer.
Installation notes
The air conditioner mustn’t be used in a room that has running fire or heat sources (such as,
working coal gas ware, operating heater).
Do not drill holes in the circuit or burn the connection pipe.
The air conditioner must be installed in a room that is larger than the minimum room area.
The minimum room area is shown on the following “table a”.
Leak test is mandatory after installation.
