17
Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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MAX
MULTI
F
MULTI
F
Table 9: Equivalent Piping Length for Elbows,
Y-branches, and Branch Distribution Units.
1
Kit contains two Y-branches: one for liquid and one for vapor.
Component
Size (Inches)
1/4 3/8 1/2 5/8 3/4
Elbow (ft.)
0.5
0.6
0.7
0.8
1.2
Y-Branch Kit (ft.)
(Multi F MAX systems only)
1
1.6
Branch Distribution Unit (ft.)
(Multi F MAX systems only)
8.2
Field-supplied elbows are allowed if they are long radius and designed for use with R410A refrigerant. Be sure to account for the additional
pressure losses in equivalent pipe length calculations for each elbow, Y-branch, and branch distribution unit. The equivalent pipe length of
each elbow, Y-branch, and/or branch distribution unit must be added to each pipe segment to ensure maximum lengths are not exceeded.
Using Refrigerant Components
Field Supplied Refrigerant Piping
Type ACR copper is the only approved refrigerant pipe material for use with LG Multi F air conditioning products. ACR rated tubing is the only
type that ships with yellow caps. Approved tubing for use with Multi F products will be marked “R410 RATED” along the length of the tube.
Tube wall thickness should meet local code requirements and be approved for a maximum operating pressure of 551 psi.
Refer to the refrigerant piping section (starting on page 22) of the General Installation Guidelines for more information on piping.
GENERAL DATA
Refrigerant Piping Requirements
