Airedale BluCube 10-48kW - Manual (Page 20)

BluCube
™
Condensing Unit
20
Condensing Units
Installation and Maintenance Manual : 7222094 11/2013
Installation Data
Refrigeration Pipework Installation - Good Practices
Oil Traps For long vertical rises in both suction and discharge lines, it is essential that oil traps are
located every 4m to ensure proper oil movement / entrapment. In addition there should
be an oil trap at the exit of the air handling unit before a vertical riser is applied (refer to
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 - 7/8 1.0
1 1/8 - 2 1/8 2.0
CAUTION All pipework should be clamped prior to insulation being applied (Suction Line).
Clamping over insulation is not acceptable.
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.
Condensing Unit Above Air Handling Unit Condensing Unit Below Air Handling Unit
- - - - -
Suction Line
………..
Liquid
Note the diagram above is for illustration only.
IMPORTANT
The pipe sizes and refrigerant charges quoted are for guidance only. It is the responsibility of the installing
contractor/site engineer to check the pipe size/refrigerant charge is correct for each system installation
and application.
Split systems may require additional oil which should be added to the low pressure 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.
REMEMBER excessive pressure loss in interconnecting pipework will impair system performance; this should
be factored in during the design of the system and where necessary oil traps employed.
Traps are required every
4m of vertical rise.