Sanyo Carrier 16LJ Series Installation Instructions Manual page 11

1.8.2 - Method of charging nitrogen gas
This is the procedure for charging nitrogen gas (N
the chiller.
Equipment to use
• The required amount of N
16LJ Volume
litres
11 1640
12 1580
13 2510
14 2380
21 3150
22 3010
23 4210
24 4020
• Pressure regulator
• Pressure-proof hose
• Adjustable wrench
• Valve key for N gas cylinder
2
• Pressure gauge (0-100 kPa)
The pressure in the chiller is charged to 0 kPa at the
generator pressure gauge.
Precautions
• Since the N gas cylinders are pressurized up to 1 MPa
2
be careful when handling them.
• Do not suddenly raise the primary or secondary
pressure of the pressure regulator.
• Fix the N gas cylinder so that it cannot fall down.
2
• Be sure not to open V1, V2 during this work.
Procedure (see Fig. 5)
• Attach a pressure regulator to the N
• Connect the vacuum gauge to SV2. Open SV2.
• Connect a pressure-proof hose to the outlet of the
pressure regulator, then slightly open the valve at the
top of the cylinder in order to purge the air from the
hose. After purging, close the valve.
• Connect the other end of the hose to SV1 and fix it
with a hose band.
• Check that V1, V2, V, B, SV1 are fully closed.
• Open the V and B-valve and then open SV1.
Note: B-valve should be closed after the solution is
charged to the chiller.
• Using the pressure regulator, charge a small amount of
N gas into the chiller.
2
• Watch the vacuum gauge while N
When the pressure inside the chiller reaches the
required pressure, close SV1, V, and B-valve. Then
close the valve of the cylinder.
• Remove the hose from SV1 and attach the service valve
cap to the service valve with sealant.
• Remove the pressure regulator and the vacuum gauge.
• Close SV2.
gas) to
2
gas:
2
16LJ Volume
litres
31 5030
32 4830
41 6150
42 5910
51 8240
52 9350
53 10350
gas cylinder.
2
gas is charged.
2
1.8.3 - Removing nitrogen gas (see Fig. 5)
Follow this procedure to remove N
Equipment to use
Adjustable wrench
Requirement to meet
The pressure in the chiller is reduced down to atmospheric
pressure.
Precautions
• Be sure not to open V1, V2 during this work.
• Adequately ventilate the machine room.
Procedure
• Check that the V1, V2, V3, SV1, SV2 are fully closed.
• Open V3.
• Remove the cap and the flare nut of SV1, and open the
valve.
• When the generator pressure gauge shows atmospheric
pressure, close SV1 and V3.
Purge tank
Maintenance
pressure gauge
Liquid trap
Purge pump
gas from the chiller.
2
Fig. 5
b-valve
11