M09G60E14-04 MSAT-XEE 8.2-30.2 9
4 Refrigeranting connections
The sizing of the refrigerating connection lines is of extreme importance for the system operating and reliability.
The diameter of the connection between the two units is function of distances, dierences in level and curve number; it has so to be calculated
by a qualied technician.
Incorrect sizing may damage the compressor or aect cooling capacity.
The operations must be performed by an expert refrigerator technician
use only a copper pipe for chiller operating
pipes must not to be too much long and with too much curves
for a good eciency do not perform curves with a radium too much short and avoid the pipe crushing
to allow the vacuum and charge operations install service ttings on pipes (if the unit is not tted with taps with service ttings)
pipes must be perfectly clean (perform a cleaning with nitrogen or dry air before connecting the pipes to the two units) and without humidity
to allow a good vacuum operation
The installation of the pipes may aect the level of noise in the system:
•
install exible joints between the unit and the pipes
•
the pipe weight has not to weigh on units but it has to be sustained by anchorage brackets
•
Brackets must allow the pipe thermal expansion
•
Install antivibration material between the brackets and the pipes so as to prevent the transmission of vibrations
4.1 Shut-o valves
A. Shut-o valves
4.2 Risk of explosion
When you install cut-o devices (solenoid valves, taps, etc.), be aware that they may cause traps for refrigerant in the form of closed zones
upstream and downstream where the refrigerant cannot freely expand.
In this situation, if there is an increase in temperature (due to exposure to the sun, proximity of pipes or sources of heat), the expansion of the
trapped gas may cause the refrigeration pipes to explode.
Evaluate whether safety valves can be installed, especially in the liquid pipes that are most exposed to this risk.
To Next Page
Loading...
Need help?
General