Chillers
ULTIMA REMOTE AIR COOLED
Chillers
15
Installation & Maintenance : 6259535 IM E 02/2013
Installation Data
PIPEWORK INSTALLATION - GOOD PRACTICES
Oil Traps
For long vertical rises in discharge lines, it is essential that oil traps are located every 6m
to ensure proper oil movement / entrapment. In addition there should be an oil trap at the
exit of the chiller before a vertical riser is applied (see example below).
Pipe Supports
The following table identifies the maximum
distance between pipe supports on vertical
and horizontal pipe runs.
Pipe O/D (inches)
Support distance (m)
3/8 - 5/8
2.0
7/8 - 1 1/8
2.5
1 3/8 - 2.0
3.0
Horizontal Sections
It is good practice to ensure a slight gradient toward the compressor in the direction of
the refrigerant flow for suction lines running horizontal. This assists oil return to the
compressor. A gradient of approximately 1:200 (0.5%) shall be used.
Condenser above Chiller
Condenser below Chiller
6m
Chiller
t
Condenser(s)
t
Condenser(s)
Chiller
Discharge Line
Liquid
1
‘U’ oil traps to be installed at 6m intervals on suction line only.
2
Diagrams show 1 circuit only.
It is the responsibility of the installing contractor/site engineer to check the pipe sizes/refrigerant charge is correct
for each system installation and application.
Split systems may require additional oil which should be added to the low side of each compressor.
Design should be in accordance with accepted refrigeration practice to ensure good oil return to the compressor(s)
under all normal operating conditions.
