Recovering The Refrigerant; Charging The Refrigerant Gas - Ariston NEVIS PROtech Serie Manuel D'utilisation Et D'entretien

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Note
PENTA 121 XC8B-O

2.10 Recovering the refrigerant

Procedure for returning all the refrigerant to the external unit:
1. unscrew the caps from the cocks on the two-way and three-way valves.
2. set the appliance to cooling mode (check whether the compressor works) and leave the appliance on for a few
minutes.
3. connect the pressure gauge.
4. shut off the two-way valve.
5. when the pressure gauge reads "0", shut off the three-way valve and turn the air conditioning unit off immediately.
6. shut the caps on the valves.
WARNING:
Recharge refrigerant gas as necessary in accordance with the instructions provided for the product used, wearing
protective clothing, avoiding sharp bursts of gas from the tank or from the system connections.

2.11 Charging the refrigerant gas

Before proceeding with the refrigerant charging operations, check that all the valves and cocks are shut.
N.B.: during initial installation, perform the procedure described in paragraph 2.9 "Creating a vacuum and checking
the seal".
1. Connect the low pressure connection of the pressure gauge to the service valve, and connect the refrigerant tank
to the central inlet of the pressure gauge. Open the refrigerant tank and then open the cap on the central valve and
work the pin valve until you hear the refrigerant exiting, then release the pin and screw the cap back on;
2. Open the three-way valve and the two-way valve;
3. Turn on the air conditioning unit in cooling mode. Leave it running for a few minutes;
4. Place the refrigerant canister on the electronic scales and record its weight;
5. Check the pressure shown on the pressure gauge;
6. Open the "LOW" knob and allow the refrigerant to fl ow gradually;
7. When the refrigerant charge in the circuit reaches the specifi ed value (calculated by means of the diff erence in
weight of the canister), shut off the "LOW" knob;
8. When charging is complete, test operation by measuring the temperature of the gas pipe with the special ther-
mometer: the temperature should be 5 to 8°C over the temperature read on the evaporation temperature section
of the pressure gauge. Now check the stability of the pressure, by connecting the pressure gauge assembly to the
three-way service valve. Open the two-way and three-way valves fully, turn on the air conditioning unit and check
for refrigerant leaks using the leak detector (if there are any leaks, carry out the procedure described in paragraph
2.10 "Recovering the refrigerant");
8. Disconnect the pressure gauge from the valve and turn the air conditioning unit off ;
9. Disconnect the tank from the pressure gauge and close all caps.
WARNING:
Do not release R410A into the atmosphere.
R410A is a fl uorinated greenhouse gas, covered by the Kyoto Protocol, with a GWP* = 1975.
(*) GWP is an acronym of "Global Warming Potential", referring to the greenhouse eff ect.
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MASTER LIQUID VALVE
MASTER GAS VALVE
1/4" - 3/8"
1/4" - 1/2"