Toshiba Carrier MMC-AP0181H2UL Instrukcja instalacji - Strona 7

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Ceiling type

Refrigerant Piping

• The connecting sections of the refrigerant pipes are

provided at the positions in the figure below.

* When using the drain

Upper side

Rear side

pump kit sold separately,

the pipe can be drawn out

only from the upper side.

Right

1. Use copper pipe with 0.03" (0.8 mm) or more

thickness. (In case pipe size is Ø5/8" (15.9 mm),

with 0.04" (1.0 mm) or more.)

2. Flare nut and flare works are also different from

those of the conventional refrigerant.

Take out the flare nut attached to the main unit of the

air conditioner, and use it.

REQUIREMENT

When the refrigerant pipe is long, provide support

brackets at intervals of 8'2" - 9'10" (2.5 - 3 m) to clamp

the refrigerant pipe. Otherwise, abnormal sound may be

generated.

CAUTION

IMPORTANT 4 POINTS FOR PIPING WORK

1. Remove dust and moisture from the inside of the

connecting pipes.

2. Tight connection (between pipes and unit)

3. Evacuate the air in the connecting pipes by using

VACUUM PUMP.

4. Check the gas leakage. (Connected points)

Pipe size

Model

AP018

AP024, AP036,

MMC-

name

type

AP042 type

1/2"

5/8"

Gas side

(12.7 mm)

(15.9 mm)

Pipe size

1/4"

3/8"

Liquid side

(6.4 mm)

(9.5 mm)

11-EN

Installation Manual

Permissible Piping Length

and Height Difference

They vary according to the outdoor unit.

For details, refer to the Installation Manual attached to

the outdoor unit.

Flaring

• Cut the pipe with a pipe cutter.

Remove burrs completely.

Remaining burrs may cause gas leakage.

• Insert a flare nut into the pipe, and flare the pipe.

As the flaring sizes of R410A differ from those of

refrigerant R22, the flare tools newly manufactured

for R410A are recommended.

However, the conventional

tools can be used by adjusting

projection margin of the

copper pipe.

▼ Projection margin in

flaring: B (Unit: in (mm))

Rigid (Clutch type)

R410A tool

Conventional

used

tool used

Outer dia. of copper pipe

R410A

1/4" (6.4), 3/8" (9.5)

0 - 0.02"

0.04" - 0.06"

(0 - 0.5)

(1.0 - 1.5)

1/2" (12.7), 5/8" (15.9)

▼ Flaring dia. meter size: A (Unit: in (mm))

–0.02 (0.4)

Outer dia. of copper pipe

R410A

1/4" (6.4)

0.36" (9.1)

3/8" (9.5)

0.52" (13.2)

1/2" (12.7)

0.65" (16.6)

5/8" (15.9)

0.78" (19.7)

* In case of flaring for R410A with the

conventional flare tool, pull it out approx.

0.02" (0.5 mm) more than that for R22 to

adjust to the specified flare size.

The copper pipe gauge is useful for

adjusting projection margin size.

Ceiling type

Tightening connection

CAUTION

• Do not apply excessive torque. Otherwise, the nut

may crack depending on the conditions.

Outer dia. of copper pipe

Tightening torque

1/4" (6.4 mm)

10 - 13 (14 - 18)

3/8" (9.5 mm)

24 - 31 (33 - 42)

1/2" (12.7 mm)

37 - 46 (50 - 62)

5/8" (15.9 mm)

46 - 57 (63 - 77)

▼ Tightening torque of flare pipe connections

Pressure of R410A is higher than that of R22.

(Approx. 1.6 times) Use a torque wrench, tighten the

flare pipe connecting sections which connect the

indoor and outdoor units of the specified tightening

torque.

Incorrect connections may cause not only a gas leak,

but also a trouble of the refrigeration cycle.

Align the centers of the connecting pipes and tighten

the flare nut as far as possible with your fingers. Then

tighten the nut with a spanner and torque wrench as

shown in the figure.

Work using double spanner

REQUIREMENT

Tightening with an excessive torque may crack the nut

depending on installation conditions.

Tighten the nut within the specified tightening torque.

Piping with outdoor unit

• Shape of valve differs according to the outdoor unit.

For details of installation, refer to the Installation

Manual of the outdoor unit.

– 6 –

Leak check test, evacuation

and other procedure

For leak check test, evacuation, addition of refrigerant,

and gas leak check, refer to the Installation Manual

attached to the outdoor unit.

REQUIREMENT

Unit: ft•lbs (N•m)

Do not supply power to the indoor unit until the leak

check test and evacuation are completed. (If the indoor

unit is powered on, the pulse motor valve is fully closed,

which extends the time for vacuuming.)

Open the valve fully

Open the valve of the outdoor unit fully.

For details, refer to the Installation Manual attached to

the outdoor unit.

Heat insulation process

Apply heat insulation for the pipes separately at liquid

side and gas side.

For the heat insulation to the pipes at gas side, use the

material with heat-resisting temperature 248 °F (120

°C) or higher.

Apply the attached heat insulation to the pipe

connecting section of the indoor unit securely without

gap.

REQUIREMENT

• Apply the heat insulation to the pipe connecting

section of the indoor unit securely up to the root

without exposure of the pipe. (The pipe exposed to the

outside may causes water leak.)

• Wrap heat insulator with its slits facing up (ceiling

side).

Wrap the pipe with the attached heat insulator

without any gap between the indoor unit.

Indoor unit

The seam must be faced upward

(ceiling side).

Heat insulation

Union

pipe

(Accessory)

Installation Manual

Heat insulator

Flare nut

of the pipe

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