AIREDALE R410A - Refrigerant Pipe Sizing and Installation; Refrigerant Pipe Sizing Guide; Oil Traps and Pipe Supports; Wall Penetration Guidelines

Refrigerant Pipe Sizing Guide
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(1) For interconnecting pipework with a predominantly horizontal layout.
(2) For interconnecting pipework with a predominantly vertical layout.
(3) Careful pipework selection must be done if the liquid line rises. Additional system sub cooling may be required to overcome friction losses.
IMPORTANT
Tandem Compressor and suction throttle valve applications: In part load, gas velocity should be taken into account
when selecting and commissioning pipework to ensure full oil return.
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factored in during the design of the system and where necessary oil separators employed.
Excessive pressure drop in liquid lines can cause poor refrigerant distribution to expansion devices and can cause
malfunction of the system (especially where the condensers is positioned lower than the evaporator).
Oil Traps
For long vertical rises in both liquid 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
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Pipe O/D (inches) Support distance (m)
´1.0
´2.0
Lines passing through walls
Refrigerant lines that rub against solid objects wear holes in the copper pipework and cause leaks, the lines must pass
through sleeved openings in such a manner that the lines do not touch.
Equivalent Pipe Lengths with R410A
Indoor Outdoor Indoor Unit
0-15m Discharge 15-40m DischargeUnit Unit Connection Size
Liquid Discharge
Liquid Horizontal Vertical Liquid Horizontal Vertical
3 1 2 3 1 2
SC09D016-X100-0 CR30 1/2 5/8 1/2 3/4 1/2 1/2 3/4 1/2
SC09D019-X100-0 CR30 1/2 5/8 1/2 3/4 5/8 1/2 3/4 5/8
SC09D023-X100-0 CR50 1/2 3/4 5/8 7/8 5/8 5/8 7/8 5/8
SC09D026-X100-0 CR50 1/2 3/4 5/8 7/8 3/4 5/8 7/8 3/4
SC12D020-X200-0 CR30 1/2 5/8 1/2 3/4 5/8 5/8 7/8 5/8
SC12D023-X200-0 CR50 1/2 5/8 1/2 3/4 3/4 5/8 7/8 3/4
SC12D029-X200-0 CR50 1/2 7/8 5/8 7/8 3/4 5/8 1 1/8 3/4
SC12D033-X200-0 CR65 5/8 7/8 5/8 1 1/8 7/8 3/4 1 1/8 7/8
SC12D036-X200-0 CR65 5/8 7/8 5/8 1 1/8 7/8 3/4 1 1/8 7/8
SC15D027-X200-0 CR30 1/2 5/8 1/2 3/4 3/4 5/8 7/8 3/4
SC15D030-X200-0 CR50 1/2 7/8 5/8 7/8 3/4 5/8 1 1/8 3/4
SC15D035-X200-0 CR50 5/8 7/8 5/8 1 1/8 7/8 3/4 1 1/8 7/8
SC15D040-X200-0 CR65 5/8 7/8 5/8 1 1/8 7/8 3/4 1 1/8 7/8
SC15D044-X200-0 CR80 5/8 7/8 5/8 1 1/8 7/8 3/4 1 1/8 7/8
SC18D037-X200-0 CR50 5/8 7/8 5/8 1 1/8 7/8 3/4 1 1/8 7/8
SC18D040-X200-0 CR50 5/8 7/8 5/8 1 1/8 7/8 3/4 1 1/8 7/8
SC18D044-X200-0 CR65 5/8 7/8 5/8 1 1/8 7/8 3/4 1 1/8 7/8
SC18D048-X1X1-0 CR50 5/8 7/8 5/8 7/8 3/4 5/8 7/8 3/4
SC18D055-X1X1-0 CR50 5/8 7/8 5/8 1 1/8 3/4 5/8 1 1/8 3/4
Precision Air Conditioning SmartCool™ 16 - 60
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SmartCool Technical Manual 7525371 V1.2.0_03_2013
Installation