Acson international ADB100D, Manual

Page: 23 / 284

21
Field Piping
To ensure satisfactory operation and performance, the following points should be noted for the field piping
arrangements of the complete refrigerant cycle.
a) Liquid loops or oil traps must be provided according to the position of the outdoor and the indoor units (de-
pending on whether the indoor unit is above or below the outdoor unit).
b) Field supplied filter dryer should be provided as close to the expansion valve(s) of the indoor unit (evaporator)
as possible.
c) Field supplied sight glass must be assembled and mounted next to filter dryer.
Maximum Pipe Length And Maximum Number Of Bends
When the pipe is too long, the required refrigerant quantity increases. Both the capacity and reliability drops as
a result. As the number of bends increases, system piping resistance to the refrigerant flow increases, thus
lowering the cooling capacity and the compressor may become defective. If the height difference between the
evaporator and the condenser is excessive, the cooling capacity drops, the lubricating oil return is retarded,
affecting the compressor efficiency adversely.
Always choose the shortest piping path and follow the recommendations as shown below :-
CAUTION:
1) Our guarantee on the performance of our air-conditioners is strictly revoked if the height, length and/
or the number of bends of the refrigerant piping system installed is beyond the limit above.
2) Bendings must be carefully made so as not to crush the pipe. Use a pipe bender to bend a pipe as far
as possible.
Maximum Allowable Piping Length & Elevation Difference
Note : If piping is more than 100ft, it is recommended to add in an accumulator.
25 m 25 m
Model Max Elevation, m (ft) Max Total Length, m (ft) Max of Bends
Bends AMC 75/100/125B (without accumulator) 20 (65.6) 35 (114.8) 8
AMC 75/100/125B (with accumulator) 25 (82.0) 45 (147.6) 8
AMC 75/100/150C (without accumulator) 20 (65.6) 35 (114.8) 8
8AMC 75/100/150C (with accumulator) 25 (82.0) 45 (147.6) 8
8AMC 75/100/125/150D (without accumulator) 20 (65.6) 35 (114.8) 8
8AMC 75/100/125/150D (with accumulator) 25 (82.0) 45 (147.6) 8
8A4MC 75/100/125/150/200/250/300D (without accumulator) 20 (65.6) 35 (114.8) 8
8A4MC 75/100/125/150/200/250/300D (with accumulator) 25 (82.0) 45 (147.6) 8