background image

In the first to third test steps, if the pressure drops, check the leakage in each joint

use sense of hearing, feeling and soap water, etc. methods to find the leaking point.

After confirming the leaking point, welding it again or tighten the nut tightly again.

Checking the leaking point

First step: 0.3MPa (3.

0kg/cm

2

g) pressurize

over 3 minutes.

Second step: 1.5Mpa

(15kg/cm

2

g) pressurize

over 3 minutes.  Large

leakage will be found.

Third step:  3.0 MPa

(30kg/cm

2

g) pressurize

about 24 hours. Little

leakage will be found.

After finishing connection of refrigerant pipe, it shall perform air tightness test.

The air tightness test adopts nitrogen tank to give pressure according to the pipe connection

mode as the following figure shown.

The gas and liquid valve are all in close state. In order to prevent the nitrogen entering the

circulation system of outdoor unit, tighten the valve rod before giving pressure (both gas

and liquid valve rods).

Outdoor

Completely tightened

Completely tightened

Flare part

Outdoor units

Manhole

Discharging valve

3-way valve totally closed
(Gas side)

Low pressure peizometer

High pressure peizometer

Meter separator

Dropping valve

2-way or 3-way  valve totally closed
(Liquid side)

Nitrogen tank

VL VH

Indoor units

Indoor

Flare part

9

From pressurizing to 24 hours later, each

 1¡  

difference of ambient temperature

will make 0.01MPa(0.1kg/cm

2

g) pressure change. It shall be corrected during test.

Check if the pressure drops

The pressure does not drop-passed
The pressure drops-check the leaking point.

5. Air discharging method

CYLINDER

OF

NITROGEN

SERVICE

HOUSE

LARGE

SLIP-ON

CONNECTOR

SWEAT

JOINT

TUBING

BRING

BRAZED

LINE

PRESSURE

GAUGE

CYLINDER

PRESSURE

GAUGE

Installation Procedure

Refrigerant piping

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Содержание HBU-28CF03

Страница 1: ...this manual properly for future use CONTENTS Name of Parts 1 Safety Cautions 2 3 Installation Procedure 4 13 INSTALLATION INSTRUCTIONS HBU 42CF03 HDU 42CF03 H HBU 42HF03 HDU 42CH03 H HBU 28CF03 HBU 2...

Страница 2: ...ir outlet Inside of unit Compressor Air inlet Air outlet Inside of unit Compressor HBU 28HF03 Air inlet Air outlet Inside of unit Compressor Air inlet Air outlet Inside of unit Compressor HDU 42HF03 H...

Страница 3: ...the following information in order to operate the airconditioner correctly WARNING If any abnormal phenomena is found e g smell of firing please cut off the power supply immediately and contact the de...

Страница 4: ...lation may cause water leak electrical shock and fire hazard Call the dealer to take measures to prevent the refrigerant from leaking If conditioner is installed in a small room be sure to take every...

Страница 5: ...ce where there is not heavy snowfall in the winter time Place where obstacles do not exist near the air inlet and air outlet Place where the air outlet may not be exposed to a strong wind Place surrou...

Страница 6: ...CF03 b Foundation anchor a Concrete foundation Install the unit so that the angle of inclination must be less than 3 degrees Note 1 Give enough room for the concrete foundation to fix by anchor bolts...

Страница 7: ...edure 580 380 Power Wiring Terminal Power Wiring Distribution Hole 25 948 840 HBU 28HF03 Power Wiring Terminal Power Wiring Distribution Hole 646 447 25 1008 830 HBU 42CF03 HDU 42CF03 H HBU 42HF03 HDU...

Страница 8: ...Gas pipe Liquid pipe Flare connection Indoor unit 3 way stop valve 2 way stop valve 4 Refrigerant piping 580 380 948 Power wiring Terminal 25 1250 HDU 42CI03 H HDU 42HK03 H HDU 42HF03 H HBU 28HF03 HB...

Страница 9: ...s such as sands enter the pipe 4 Piping connection Forced fastening without centering may damage the threads and cause a gas leakage Pipe dia Fastening torque Liquid pipe 6 35mm Gas pipe 15 88mm Liqui...

Страница 10: ...to prevent the nitrogen entering the circulation system of outdoor unit tighten the valve rod before giving pressure both gas and liquid valve rods Outdoor Completely tightened Completely tightened Fl...

Страница 11: ...tness test and discharging all the nitrogen connect the vacuum pump as the following figure shown Refrigerant piping 10 When the total length L of the two units connecting pipe is less than 5m it is u...

Страница 12: ...r only Select wire sizes and circuit protection from table below This table shows 20 m length wires with less than 2 voltage drop WARNING 30mA Item Model Phase 3 Switch breaker A Circuit breaker Overc...

Страница 13: ...380 400V 50Hz N 1 2 3 Y G R S T HBU 42CF03 HDU 42CF03 H HDU 50HT03 H HDU 42CH03 H HDU 42CI03 H HDU 42HK03 H To Indoor Unit Y G To Indoor Unit W B R BR GR L N 3 4 5 Y G R S T N Y G POWER SUPPLY 3N 380...

Страница 14: ...ON OPERATION WHEN ELECTRIC POWER IS SUPPLIED BE SURE TO EXECUTE OFF OPERATION BEFORE ELECTRIC POWER IS DISCONNECTED FOR SERVICING This unit has a function of automatic restart system after recovering...

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