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132

MULTI V IV System Installation Manual

Due to our policy of continuous product innovation, some specications may change without notication.

REFRIGERANT PIPING DESIGN

Insulating the Refrigerant Piping

Figure 48: Joints between branch and pipe should be sealed

with tape included in each kit.

Insulator

(included with kit)

Liquid and vapor

pipe joints

Insulator for

field piping

Tape

(field supplied)

Insulate the header using

the insulation attached to

the branch pipe kit as shown.

Insulator

Field pipe

insulator

Tape

Figure 49: Y-Branch Insulation.

Figure 50: Header Insulation.

Figure 51: Cap pipes should be insulated using the insulator included in each kit, and then taped as shown.

Tape

Cap pipe

Pipe Insulator Cap

(included with Header Kit)

Additional Insulation for Y-Branches and Headers May be Required in Humid Environments.

If the system has been operating for a long time in a high humidity environment (dew point temperature: more than 73°F), condensate is

likely to form. If this happens, install 3/8 inch thick ethylene propylene diene methylene (EPDM) insulation that is plenum-rated with a heat-

resistance factor of more than 248°F.

Note:

Applying Insulation to Y-Branch and Header Fittings

Check the fit of the insulation jacket provided with the LG Y-branch and Header kits after all pipes are brazed to fittings. Mark all pipes at the

point where the insulation jacket ends. Remove the jacket. Install field-supplied insulation on the pipe segments first, and then install the LG

provided insulation plugs on the ends of all unused Header ports. Apply the clam-shell insulation on jackets to Y-branch and Header fittings

last. Peel the adhesive glue protector slip from the insulation jacket and install the clam-shell jacket over the fitting.

LG MULTI V IV ARUN072BTE4 User Manual

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