Ariston ALYS 25 MC8 User And Installation Manual page 43

1. unscrew the caps on the cocks of the two-way and three-way valves, and on
the service valve;
2. connect the vacuum pump to the small service valve in the external unit
three-way valve;
3. once you have opened the corresponding valves on the pump, start the lat-
ter and leave it running. Create the vacuum for approximately 20/25 min-
utes;
4. make sure the pressure gauge reads -0.101 MPa (-760 mmHg);
5. shut the cocks on the pump and turn it off. Check that the needle on the
pressure gauge does not move for approximately 5 minutes. If the needle
moves, this means that air is seeping into the system, and you must check
all connections are tight enough and that the piping connections were all
performed correctly; then repeat the procedure from step 3;
6. disconnect the vacuum pump;
7. open the cocks on the two-way and three-way valves fully,
8. screw the cap tightly to the service outlet, ensuring that it is well sealed;
9. after having tightened all the caps, check their entire circumference for
gas leaks.
WARNING:
Always protect the connection cables and pipes to prevent their being
damaged, as they could cause gas leaks when damaged (personal injury
from cold burns)
MONOSPLIT INSTALLATION TECHNICAL SPECIFICATIONS
OUTDOOR UNIT MODEL
Liquid pipe diameter
Gas pipe diameter
Maximum length of pipe with standard charge
Maximum pipe length*
Standard charge
Extra gas recharge
Maximum difference in height between internal and external unit**
Type of refrigerant
(*) at the maximum distance, effi ciency is approximately 90%.
(**) with a difference in height over 5 m, we recommend you include a trap.
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 instruc-
tions provided for the product used, wearing protective clothing, avoiding
sharp bursts of gas from the tank or from the system connections.
VACUUM PUMP
GAS VALVE
COCK
SERVICE
PROTECTION
CONNECTION
ALYS 25 ALYS 35
MC8-O MC8-O
inches 1/4
inches 3/8
m 5
m 20
kg 0,8
g/m 20
m 8
R410A R410A
GB
SERVICE CONNECTION
LIQUID
VALVE
CAP
ALYS 50
MC8-O
1/4 1/4
3/8 1/2
5 5
20 25
0,95 1,25
20 20
8 10
R410A
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