Refrigerant Charge - Astralpool EF Serie Manual Tecnico

ENGLISH
DRAINING THE COOLING CIRCUIT:
It is imperative to drain the cooling circuit before charging the refrigerant.
1.- Connect the gauge tubes to the intake pressure lines of the circuit (low pressure) and to the
return pressure lines (high pressure).
2.- Connect the main line of the gauge to the vacuum pump.
3.- Open all the valves, including the solenoid and the regulating valves.
4.- Open the valves of the gauge (LO = low pressure valve / HI = high pressure valve).
5.- Activate the vacuum pump and wait until the circuit is completely drained.
6.- Close all valves or stopcocks and disconnect the vacuum pump.

REFRIGERANT CHARGE:

The equipment uses R-407-C class refrigerant, which is a blend of 3 different gases with different
properties.
This is the reason why the gas taken from the refrigerant bottle must be introduced in the low-
pressure circuit by means of a charger (expansion system).
After having discharged the cooling circuit, and after having installed the charger and connected
the flexible tubes of the gauge to the high and low-pressure circuits, we can proceed with the
charge:
1.- Connect the main line of the gauge to the R-407 bottle stopcock.
2.- Open the bottle stopcock and purge the section of tubing.
3.- Open the high-pressure valve.
4-. Pressurise the equipment to equal the pressure of the bottle.
5.- Close all gauge valves.
6.- Start the machine. The low-pressure switch may be activated. To continue with the charge, you
must disconnect the low-pressure switch in the electrical panel (just while the charging operation is
underway).
Open the low-pressure valve until the pressure is above the trip point of the low-pressure
7.-
switch.
8.- Once in a while, close the LO valve of the gauges in order to confirm the real pressure of
intake.
9.- Verify that the outflow pressure is not above the normal range for normal working conditions.
10.- When the correct weight of refrigerant has been charged, close the LO valve.
11.- When the equipment is functioning according to the specified working conditions, close the
valve of the charging bottle and disconnect the tubes taking precautions regarding gas purge.
12.- Place the caps on the supply and return lines of the compressor.
DETECTING LEAKS:
Leaks may appear due to various reasons. Leakage risk may be greatly reduced if the equipment is
correctly installed by qualified personnel and by taking certain precautions in the assembly of the
equipment.
Symptoms of a leak
Leaks will cause a decrease in the refrigerant charge in the equipment. Low refrigerant charge may
be the cause of:
© TALLERES DEL AGUA S.L. 2008. TODOS LOS DERECHOS RESERVADOS. DOCUMENTO CONFIDENCIAL Y EN PROPIEDAD.
Page 46 of 50