Ariston NIVOS 25 MD0-O Manuel D'utilisation Et D'entretien page 45

3. once you have opened the corresponding valves on the pump, start the
latter 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
MULTISPLIT INSTALLATION TECHNICAL SPECIFICATIONS
OUTDOOR UNIT MODEL
Liquid pipe diameter
Gas pipe diameter
Maximum pipe length for single internal unit
with standard charge
Maximum pipe length for single internal unit*
Maximum total length of piping (sum of internal units)*
Standard charge
Extra gas recharge
Maximum difference in height between internal and ex-
ternal unit (internal unit just above the external unit)**
Maximum difference in height between internal and ex-
ternal unit (internal unit just below the external unit)**
Maximum difference in height between internal units
Type of refrigerant
(*) at the maximum distance, efficiency is approximately 90%.
(**) with a difference in height over 5 m, we recommend you include a trap.
inches
inches
g/m
DUAL 55 DUAL 55
XD0A-O XD0-O
2x 1/4
inches 2x 1/4
2x 3/8
inches 2x 3/8
m
5 5
m 20 20
m 30 30
kg 2 1,9
g/m 15 15
m
15 15
m
10
10
10
m 10
R410A
R410A
VACUUM PUMP
SERVICE CONNECTION
GAS VALVE
COCK
SERVICE
PROTECTION
CONNECTION
CAP
NIVOS 25
MD0 - O
1/4
3/8
5
m
20
m
0,85
kg
20
8
m
R410A
TRIAL 80 QUAD 110
XD0-O XD0-O
3x 1/4 4x 1/4
3x 3/8 4x 3/8
5 5
25 30
45 60
2,4 2,7
15 15
15 15
10 10
10 10
R410A R410A
/ 45
GB
LIQUID
VALVE
NIVOS 35
MD0 - O
1/4
3/8
5
20
1,03
20
8
R410A
PENTA 125
XC6-O
5x 1/4
4x3/8 + 1x1/2
5
30
75
3,5
15
15
10
10
R410A