ICC / ICU SYSTEM APPLICATION MANUAL
August2003: E\Manuals\Others\Qualitair\ICC\0412117 12
7. MECHNICAL INSTALLATION DETAILS CONT
Refrigerant Pipe Sizes (“)
Table A Horizontal or Downflow application (Suction Line)
Based on 5psi (0.35bar) Pressure drop Line Length (m)
Table A 5 10 15 20 25 30 35 40 45 50 60 70 80 90 100
ICU30 Suction 3/8” ½” ½” ½” ½” 5/8” ¾”
Liquid ¼” ¼” ¼” ¼” ¼” ¼” DO NOT USE THIS AREA
ICU40 Suction ½” ½” ½” 5/8” 5/8” 5/8” ¾”
Liquid ¼” ¼” ¼” ¼” ¼” ¼” DO NOT USE THIS AREA
ICU55 Suction ½” 5/8” 5/8” 5/8” 5/8” ¾” ¾” ¾” ¾” ¾” ¾” 7/8” 7/8” 7/8” 7/8”
Liquid 3/8” 3/8” 3/8” 3/8” 3/8” 3/8” ½” ½” ½” ½” ½” ½” ½” ½” ½”
ICU80 Suction 5/8” 5/8” ¾” ¾” ¾” ¾” 7/8” 7/8” 7/8” 7/8” 7/8” 7/8” 7/8” 7/8” 11/8”
Liquid 3/8” 3/8” 3/8” 3/8” ½” ½” ½” ½” ½” ½” ½” ½” ½” ½” ½”
Table B Upflow application (Suction Line)
Max Max R407c – kg
Table B Size Lift Additional Oil Additional Charge
ICU30 Suction 3/8” 5 None >5m = 25g/m (¼” Liquid)
ICU40 Suction ½” 15 None >5m = 25g/m (¼” Liquid)
ICU55 Suction ½” 8 None >5m = 40g/m (3/8” Liquid)
>30m = 105g/m (1/2” liquid)
ICU80 Suction ¾” 30 None >5m = 40g/m (3/8” Liquid)
>30m = 105g/m (1/2” liquid)
Note:
a) = DO NOT USE IN THIS AREA.
b) Crankcase heaters are required where system charge exceeds 4. 5kg and DOES NOT contain
an accumulator.
c) Maximum pipe run stated in Table A, must include the reduction allowance (equivalent length)
for vertical lifts and fittings indicated in Tables b.
Table C General fitting losses - equivalent straight lengths in metres.
Pipe Size
Fitting
3/8” ½” 5/8” ¾” 7/8” 11/8”
45° Bend 0.12 0.15 0.18 0.21 0.24 0.30
90° Bend Short Radius 0.37 0.43 0.49 0.55 0.61 0.79
90° Bend Long Radius 0.24 0.27 0.30 0.37 0.43 0.52
180° Bend Short Radius 0.73 0.91 1.10 1.28 1.46 1.83
180° Bend Long Radius 0.46 0.55 0.64 0.76 0.85 1.07
90° Elbow 0.67 0.85 1.04 1.25 1.46 1.89
Oil Trap 0.74 0.86 0.98 1.10 1.22 1.58