Home
Главная
Carrier
Настенная Сплит-Система
42UQV025M / 38UYV025M
Руководство по установке Страница: 8

Carrier 42UQV025M / 38UYV025M [8/17] Evacuating

Incused line

Flare at indoor

unit side

Flare at outdoor

unit side

Flare nut

Half union

Externally

threaded side

Internally

threaded side

Use a wrench to secure. Use a torque wrench to tighten.

CAUTION

Refrigerant Piping Connection

1. Cut the pipe with a pipe cutter.

2. Insert a ﬂ are nut into the pipe and ﬂ are the pipe.

• Projection margin in ﬂ aring : A (Unit : mm)

Rigid (clutch type)

Imperial (wing nut type)

Outer dia. of copper pipe R410A

6.35 1.5 to 2.0

9.52 1.5 to 2.0

Align the centers of the connecting pipes and tighten the ﬂ are nut as far as

possible with your ﬁ ngers. Then tighten the nut with a spanner and torque

wrench as shown in the ﬁ gure.

Tightening connection

Do not apply excess torque. Otherwise, the nut may crack depending on

the conditions.

(Unit : N·m)

Outer dia. of copper pipe Tightening torque

Ø6.35 mm 16 to 18 (1.6 to 1.8 kgf·m)

Ø9.52 mm 30 to 42 (3.0 to 4.2 kgf·m)

Evacuating

After the piping has been connected to the indoor unit, you can perform the

air purge together at once.

AIR PURGE

Evacuate the air in the connecting pipes and in the indoor unit using a

vacuum pump. Do not use the refrigerant in the outdoor unit. For details,

see the manual of the vacuum pump.

Outer dia.

of copper pipe

R410A tool used

Conventional tool

used

6.35 0 to 0.5 1.0 to 1.5

9.52 0 to 0.5 1.0 to 1.5

• Tightening torque of ﬂ are pipe connections

The operating pressure of R410A

is higher than that of R22 (approx.

1.6 times). It is therefore necessary

to ﬁ rmly tighten the ﬂ are pipe

connecting sections (which connect

the indoor and outdoor units) up to the

speciﬁ ed tightening torque. Incorrect

connections may cause not only a

gas leakage, but also damage to the

refrigeration cycle.

1. How to shape the pipes

Shape the pipes along the incused line on

the outdoor unit.

2. How to ﬁ t position of the pipes

Put the edges of the pipes to the place with

a distance of 85 mm from the incused line.

Shaping pipes

Flaring

Be sure to use a vacuum pump with counter-ﬂ ow prevention function so that

inside oil of the pump does not ﬂ ow backward into pipes of the air conditioner

when the pump stops.

(If oil inside of the vacuum pump enters the air conditioner, which use R410A,

refrigeration cycle trouble may result.)

1. Connect the charge hose from the manifold valve to the service port of the

packed valve at gas side.

2. Connect the charge hose to the port of the vacuum pump.

3. Open fully the low pressure side handle of the gauge manifold valve.

4. Operate the vacuum pump to start evacuating. Perform evacuating for

about 15 minutes if the piping length is 20 meters.

(15 minutes for 20 meters)

(assuming a pump capacity of 27 liters per minute) Then conﬁ rm that the

compound pressure gauge reading is –101 kPa (–76 cmHg).

5. Close the low pressure side valve handle of the gauge manifold valve.

6. Open fully the valve stem of the packed valves (both gas and liquid sides).

7. Remove the charging hose from the service port.

8. Securely tighten the caps on the packed valves.

Using a vacuum pump

Packed valve at liquid side

Service port (Valve core (Setting pin))

Packed valve at gas side

Vacuum

pump

Vacuum pump adapter for

counter-ﬂ ow prevention

(For R410A only)

Charge hose

(For R410A only)

Handle Hi

(Keep full closed)

Manifold valve

Pressure gauge

Compound pressure gauge

Handle Lo

Charge hose

(For R410A only)

Connecting pipe

–101 kPa

(–76 cmHg)

CAUTION

• KEEP IMPORTANT 5 POINTS FOR PIPING WORK.

(1) Take away dust and moisture (inside of the connecting pipes).

(2) Tighten the connections (between pipes and unit).

(3) Evacuate the air in the connecting pipes using a VACUUM PUMP.

(4) Check gas leak (connected points).

(5) Be sure to fully open the packed valves before operation.

Packed valve handling precautions

• Open the valve stem all the way out, but do not try to open it beyond the

stopper.

• Securely tighten the valve cap with torque in the following table:

Pipe size of Packed Valve Size of Hexagon wrench

12.70 mm and smallers A = 4 mm

15.88 mm A = 5 mm

Hexagon wrench

is required.

Cap

Cap Size

(H)

Torque

Valve Rod

Cap

H17 - H19

14~18 N·m

(1.4 to 1.8 kgf·m)

H22 - H30

33~42 N·m

(3.3 to 4.2 kgf·m)

Service

Port Cap

H14

8~12 N·m

(0.8 to 1.2 kgf·m)

H17

14~18 N·m

(1.4 to 1.8 kgf·m)

Service Port Cap

Valve Rod Cap

90°

Die

Pipe

Obliquity Roughness Warp

1113950214-EN.indd 61113950214-EN.indd 6 2/22/13 3:33 PM2/22/13 3:33 PM

Carrier 42UQV025M / 38UYV025M [8/17] Evacuating

Содержание

Похожие устройства