Manual Ariston MIROS 35 XC4-I (page 25 of 88) (English, Dutch, French, Italian, Portuguese, Spanish)

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2.10 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

MODEL

5 kW

Liquid pipe diameter

1/4"

Gas pipe diameter

3/8"

Maximum length of pipe with standard charge

2 x 7,5 m

Maximum lenght of pipe (total / each unit)*

2 x 20 m / 20 m

Standard charge

1,27 kg

Extra gas recharge

15 g/m

Maximum difference in height between internal and external unit**

15 m

Type of refrigerant

R410A

(*) at the maximum distance, the efﬁ ciency is approximately 90%.

(**) with a difference in height of more than 3 m, we recommend you include a trap as illustrated in the

ﬁ gure.

2.11 Charging the refrigerant gas

Before proceeding with the refrigerant charging operations, check that all the valves

and cocks are shut.

N.B.: the ﬁ rst time you install the appliance, perform the procedure described in

paragraph 2.9 “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. Place the refrigerant cylinder above the electronic scale and record the weight;

5. Control the pressure shown on the pressure gauge;

6. Open the “LOW” knob and allow the refrigerant to ﬂ ow gradually;

7. When the refrigerant recharge introduced into the circuit reaches the set value

(provided by the difference in weight of the cylinder), close the “LOW” knob;

8. 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 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 there are

no refrigerant leaks using the leak detector. (If there are any leaks, carry out 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.

WARNING:

Do not disperse R410A in

the atmosphere: R410A

is a greenhouse ﬂ uori-

nated gas, covered by the

Kyoto Protocol, with a

GWP(*)=1975.

(*) GWP,

stands for «Global Warming Po-

tential».

WARNING:

Recharge any refrigerant gas in accordance with the instructions provided on the product used, wearing protective

clothing, avoiding violent outlets of gas from the tank or from the system’s connections.

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Ariston MIROS 35 XC4-I Manual

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