Piping Insulation - LG LSN HSV4 Series Installation Manual

Standard wall-mounted indoor unit

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Table Of Contents

Table of Contents

MULTI

MAX

Connecting the Indoor Unit Piping to the Field-Installed Piping

1. Center align the indoor unit piping (refrigerant and drain) and the

field-installed piping, then hand tighten the flare nut.

2. Tighten the flare nut with a torque wrench.

3. Attach the drain tube piping to the

indoor unit drain hose as shown.

Note:

If the drain hose is routed inside a room,

add insulation to prevent condensation

from forming.

Refrigerant Piping System Insulation

All refrigerant piping including Y-branch connections, field-provided isolation ball valves, service valves, and elbows must be completely

insulated using closed cell pipe insulation (up to the indoor unit piping connections). To prevent heat loss/heat gain through the refrigerant

piping, all refrigerant piping including liquid lines and vapor lines must be insulated separately. Insulation must be a minimum 1/2" thick, and

thickness may need to be increased based on ambient conditions and local codes. Insulation for field-installed refrigerant piping must have

a minimum heat resistance of 248°F. Table 25 lists minimum wall thickness requirements for Ethylene Propylene Diene Methylene (EPDM)

insulation.

Note:

Follow locals codes when selecting EPDM insulation wall thickness. Thickness in Table 25 is based on heat conductivity of 0.61 Btu/in/h/ft2/°F.

Classification

ø1/4 inches

Liquid pipe

ø3/8 inches

≥ø1/2 inches

ø3/8 inches

ø1/2 inches

Vapor pipe

ø5/8 inches

ø3/4 inches

1. Air-conditioned, Typical location

• When piping passes through an indoor area where the indoor unit operates, such as an apartment, classroom, office, mall, hospital, etc.

2. Air-conditioned, Special location

• When the location is air conditioned, but has severe temp/humidity difference due to high ceilings, such as a church, auditorium, theater, etc.

• When the location is air conditioned, but internal temperature/humidity are high, such as a bathroom, swimming pool, locker room, etc.

3. Non-air conditioned, Typical location

• When piping passes through an indoor area where the indoor unit does not operate, such as a hallway, dormitory, or school, etc.

4. Non-air conditioned, Special location (when both conditions listed below are present)

• When piping passes through an indoor area where the indoor unit does not operate

• When the humidity is high and there is no air flow in the location where the piping is installed

Figure 43: Extending the Drain Hose.

Drain extension

Narrow tape

Adhesive

Table 25: Insulation Guidelines for Typical and Special Circumstances.

Air-conditioned location

1. Typical location

1/2 inches

Due to our policy of continuous product innovation, some specifications may change without notification.

PIPING CONNECTIONS

Figure 42: Indoor Unit to Field-Installed Piping Connection.

Indoor unit piping

Indoor unit

drain hose

Torque

wrench

2. Special location

3. Typical location

1/2 inches

3/4 inches