ICUS CONDENSING UNIT INSTALLATION MANUAL
Jan 09:F\Qualitair Eng\Icu\Manuals\0412118S
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7.5 ICUS – RECOMMENDED LINE SIZES
R407 Cooling Units
Horizontal or Downflow application (Suction Line)
Upflow application (Suction Line)
Based on 5psi (0.35bar) Pressure drop
Max
Max
R407c – kg
Table A
5
10
15
20
25
30
Table B
Size
Lift
Additional Oil
Additional Charge
ICUS30
Suction
3/8”
½”
½”
½”
½”
5/8”
Suction
3/8”
5
None
>5m = 25g/m (¼” Liquid)
Liquid
¼”
¼”
¼”
¼”
¼”
¼”
ICUS40
Suction
½”
½”
½”
5/8”
5/8”
5/8”
Suction
½”
8
None
>5m = 25g/m (¼” Liquid)
Liquid
¼”
¼”
¼”
¼”
¼”
¼”
ICUS55
Suction
½”
5/8”
5/8”
5/8”
5/8”
¾”
Suction
½”
10
None
>5m = 40g/m (3/8” Liquid)
Liquid
3/8”
3/8”
3/8”
3/8”
3/8”
3/8”
>30m = 105g/m (1/2” liquid)
ICUS80
Suction
5/8”
5/8”
¾”
¾”
¾”
¾”
Suction
¾”
10
None
>5m = 40g/m (3/8” Liquid)
Liquid
3/8”
3/8”
3/8”
3/8”
½”
½”
>30m = 105g/m (1/2” liquid)
Note:
a) Maximum pipe run stated in Table A, must include the reduction allowance (equivalent length) for vertical lifts and fittings indicated in Tables in this section.
