44
EN
8. PIPING AND CONNECTIONS
Refrigerant recovery
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. close the two-way valve.
5. when the pressure gauge reads “0”, close the three way valve and turn the air
conditioning off immediately.
6. shut the caps on the valves.
(*) at the maximum distance, the efficiency is approximately 90%.
ATTENTION
Recharge any refrigerant gas in accordance with the instructions provided on the
productused, wearing protective clothing, avoiding violent outlets of gas from the
tank or from the system’s connections.
IMPORTANT CHECK FOR ANYREFRIGERANT LEAKS
Once you have made the connections, open the cocks so that the gas fills the piping
and always check all piping against leaks using a leak detector. (personal injury from
cold burns)
Charging the refrigerant gas
Before proceeding with the refrigerant charging operations, check that all the valves
and cocks are shut.
N.B: the first time you install the appliance, perform the procedure described
in paragraph “Making a vacuum and checking the tightness”
1. Connect the service valve to the low pressure connection of the pressure gauge,
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 act on 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 on cooling mode. Leave it on for a few minutes.
4. Control the pressure shown on the pressure gauge.
5. Open the “LOW” knob and allow the refrigerant to flow gradually.
6. Once the pressure level is reached, shut the “LOW” knob.
7. When the charging is complete, test the operation, measuring the temperature of
the gas pipe with the special thermometer: the temperature should be between 5°C
and 8°C more than the temperature read on the evaporation temperature section of
the pressure gauge. Now check the stability of the pressure, connecting the pressu-
re gauge assembly to the three-way service valve. Open the two-way and three-way
valves fully, turn on the air conditioning unitand check there are no refrigerant leaks
using the leak detector. (if there are any leaks, carryout the procedure described in
paragraph 2.10 “refrigerant recovery”).
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.
Capacities (W)
5300
7100 10500 14000 17600
Liquid pipe diameter
1/4"
3/8"
3/8"
3/8"
3/8"
Gas pipe diameter
1/2"
5/8"
5/8"
5/8"
5/8"
Max. distance between indoor and
outdoor unit* (m)
30
50
65
65
65
Max height drop between indoor and
outdoor units H(m)
20
25
30
30
30
Number of bends
Less than 10
Refrigerant type
R410a
H(m)
Содержание PS09 18HI
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