slope is 1/200~1/250. P traps, double risers and reduced pipe diameters may be required for
suction lines where long vertical risers cannot be avoided.
All pipes should be adequately supported to prevent sagging which can also create oil traps. The
recommendation support distance for reference is as below :
Tube Size Max Distance between two support
12.7mm (1/2 inch) 1.2m
16.0mm (5/8 inch) 1.5m
22.0mm (7/8 inch) 1.85m
28.5mm (11/8 inch) 2.2m
The solenoid valve should be installed close to the indoor TXV.
To avoid oxidation from taking place inside the tube during brazing, charge no more than 0.1Mpa
nitrogen through the tube when brazing the joint.
There are many books on good trade practice for refrigeration piping available and as stated
earlier in the Disclaimer page of this Manual and it is not our intention to repeat the many
variations here but the above can be used as a good practical guide.
Warning!
Do not assume that the service connection sizes on the unit (at the service valves) are in fact the
correct size to run your interconnecting refrigeration pipes. The service valve sizes have been
selected for convenience of installation and in some cases (larger units) these may be
considered too small, however for the very short pipe run within our units these service
connection sizes are adequate.
All interconnecting piping should be sized to satisfy the duty required.
Fig. 16 Commissioning Hook-up & Essential Equipment
26
To Next Page
Loading...
