Trane 1-Way Cassette-Indoor Manual de instalación descargar pdf (Pagina 13)

VRF-SVX27A-EN 13

Installation

6. Align the pipes and tighten the flare nuts manually and then with a spanner torque wrench,

applying the torque according to pipe dimensions:

Leak Testing Pipe Connections

Notes:

• All required piping pressure tests must be completed in accordance with national and/or

local codes.

• When leak-testing refrigerant systems, observe all safety precautions.

• Leak test only one circuit at a time to minimize system exposure to potentially harmful

moisture in the air.

• Use R-410A refrigerant gas as a tracer for leak detection and use oil-pumped dry nitrogen

to develop required test pressures.

1. Close liquid line angle valve.

2. Connect R-410A refrigerant cylinder to high side charging port (at condenser or field supplied

discharge line access port). Add refrigerant to reach pressure of 12 to 15 psig.

Outer diameter

(in. [mm])

Connection

torque (ft·lb)

Flare

dimension

(in.)

Flare shape (in.)

1/4 (6.35) 10.3–13.3 ft·lb 0.34–0.36

3/8 (9.52) 25.1–31.0 ft·lb 0.50–0.52

1/2 (12.70) 36.1–45.0 ft·lb 0.64–0.65

5/8 (15.88) 50.2–60.5 ft·lb 0.76–0.78

R.016–.031

45°±2°

90°±2°

WARNING

Confined Space Hazards!

Do not work in confined spaces where refrigerant or other hazardous, toxic or flammable gas

may be leaking. Refrigerant or other gases could displace available oxygen to breathe, causing

possible asphyxiation or other serious health risks. Some gases may be flammable and or

explosive. If a leak in such spaces is detected, evacuate the area immediately and contact the

proper rescue or response authority. Failure to take appropriate precautions or to react properly

to such potential hazards could result in death or serious injury.

WARNING

Explosion Hazard!

Never use an open flame to detect gas leaks. It could result in an explosion. Use a leak test

solution for leak testing. Failure to follow recommended safe leak test procedures could result

in death or serious injury or equipment or property-only-damage.

Use only dry nitrogen with a pressure regulator for pressurizing unit. Do not use acetylene,

oxygen or compressed air or mixtures containing them for pressure testing. Do not use

mixtures of a hydrogen containing refrigerant and air above atmospheric pressure for pressure

testing as they may become flammable and could result in an explosion. Refrigerant, when

used as a trace gas should only be mixed with dry nitrogen for pressurizing units. Failure to

follow these recommendations could result in death or serious injury or equipment or

property-only damage.

Do not exceed unit nameplate design pressures when leak testing system. Failure to follow

these instructions could result in an explosion causing death or serious injury.

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