LG MULTI F Engineering Manual page 105

F
MULTI
F
MULTI MAX
Insulating the Refrigerant and Drain Piping
Refrigerant Piping Insulation
Field-installed vapor and liquid refrigerant piping lines must be
properly and completely covered in insulation (up to the indoor unit
piping connections). Any exposed piping may generate condensate
or will cause burns if touched. Insulation for this field-installed refrig-
erant piping must have a minimum heat resistance of 248°F.
Duct (low static) indoor units have been tested under and meet the
requirements of the "KS Conditions." If the indoor unit is installed
and is operated at an extended period in a highly humid environment
(dew point temperature >73°F), however, condensate will form. To
prevent this phenomenon, install adiabatic glass wool insulation with
a thickness or 13/32 to 13/16 inches thick. Also, install glass wool
insulation on all indoor unit that are located in the ceiling plenum.
Drain Piping Insulation
Drain piping must have insulation a minimum of 7/32 inches thick.
DUCT (LOW STATIC) INDOOR UNITS
Due to our policy of continuous product innovation, some specifications may change without notification.
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Installation and Best Layout Practices
Figure 142:Insulating the Piping.
Liquid Piping
Connection
Vapor Piping Connection
Insulation for Refrigerant Piping
(Field-Supplied) Insulation for Field-Installed Piping
Ensure no gaps are present.
Insulation for Refrigerant Piping
(Field-Supplied)
Clamp for Insulation
(Field-Supplied)
Insulation
(Field-Supplied)
(Field-Supplied)
Overlap the Insulation at the
Connection
DUCT (LOW STATIC) | 105