cellarking CXE Series Manuel technique - Page 12

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MCU+ 130 – 180 (
Dimensions in mm.)
1.
Individual pipe runs to a maximum of 20m, including 7.5m lift, are permissible with liquid lines, 80m with
expansion lines, provided good refrigeration practice is followed.
Performance is based on 7.5m pipe runs. Correctly sized pipes for each installation will result in no significant
loss of capacity on extended pipe runs.
a) Pipe sizes are based on:-
Minimum of 3.8 m/s (750 fpm) suction gas velocity for horizontal or downflow.
Minimum of 7.6 m/s (1500 fpm) suction gas velocity for upflow.
Maximum of 15.2 m/s (3000 fpm) suction gas.
b) Where vertical risers exceed 3m, oil traps must be formed in the pipe. This will help ensure that oil returns to
the compressor. Typically fit an oil trap every 3m with a trap at the bottom of the riser.
2.
In calculating equivalent lengths of pipe runs, the effect of bends and fittings must be taken into account. The
table below covers the fittings most likely to be encountered in this installation.
The equivalent lengths of all the fittings in a pipe run should be added together and the total added to the actual
pipe length in order to calculate the total equivalent length.
3.
Use the shortest possible route, avoiding sharp bends.
4.
Completely insulate the suction line, fully over the indoor unit drain tray.
MODEL
A
MCU+ 130
1000
MCU+ 150
1000
MCU+ 165
1000
MCU+ 180
1100
B
C
D
E
1020
495
251
100
1020
495
251
100
1020
495
251
100
1215
675
211
95
MCU+ PIPEWORK
12
Weight (kg)
101
103
103
118
55908039-02