Installation; Metering Devices; Brazing Connections; Leak Jesting - LG Central Air Conditioning Remote Condensing Unit Installation Instructions & Use And Care

• Do not make direct contact with ductwork, floor joists, wall studs, walls, and plumbing.
• Leave slack between building and unit to avoid vibration transmission.
• Seal wall penetration with RTV or other suitable caulk.
• Do not strap line set to joists with wire or strapping in direct contact.
• Liquid line filter drier is factory-installed in unit.

INSTALLATION

• Set unit on pad with electrical control box close to house.
• Bolt to pad if local codes require.
• If installed on rooftop, unit must be securely mounted with vibration isolators to prevent vibration transmission.

METERING DEVICES

For piston (0rifice):
• Indoor piston must be changed to required piston size provided with condensing unit. Piston size is listed on
rating plate.
• Piston is located between liquid line set and indoor coil distributor.
For TXV:
• Caution! Remove piston located between liq-
uid line set and indoor coil distributor.
• Screw TXV into distributor assembly.
• Connect pressure equalizer tube w/ flare nut to indoor
coil pressure port.
• Caution! Always make sure the suction line is
cleaned before clamping the bulb in place.
• On lines that are 3/4" O.D. or smaller, the bulb may
be installed on top of the line or side mounted (pref-
erably at the 10 or 2 o'clock position) (See Figure 5).
• On lines that are 7/8" O.D. or larger, the remote bulb
should be installed at 45˚ or at approximately the 4 or
8 o'clock position (See Figure 5).
• Insulate temperature bulb with foam insulation.

BRAZING CONNECTIONS

I. Ends of the refrigerant lines must be cut square, deburred, and cleaned.
2. Sweep refrigerant lines with Nitrogen or other inert gas.
3. Caution! Wrap service valve with wet rag to avoid overheating (It is recommended, to
removed the valve core prior to brazing).
4. Use a brazing alloy rod with minimum 2% silver.
5. After brazing, quench joint with water or wet rag and re-install vale core.
6. Re-install valve core, if removed.
on smaller lines,
bulb may be mounted
on top
9
do not mount
bulb on bottom
of line
— 5 —
3/4" & smaller
vator line
12
3
vator
Line
Bulb
7/8" & larger
vator line
Fig. 5