Multi F Outdoor Condenser Installation Manual
MULTI
F
MAX
MULTI
F
Due to our policy of continuous product innovation, some specifications may change without notification.
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Multi F MAX Outdoor Unit Piping Specifications
• Number of installed length of branches depends on system specifications.
• CF = Maximum number of connectible indoor units – Total number of connected indoor units
MULTI F MAX REFRIGERANT
CHARGE WORKSHEET
LG Multi F MAX outdoor units ship from the factory with a charge of R410A refrig-
erant. A trim charge will need to be added to take into account additional piping
length.
To determine the additional refrigerant that is needed, apply the formula below,
and record the results. If the total additional refrigerant charge value is a negative
number, then an additional trim charge does not need to be added to the system.
Multi F MAX Outdoor Unit Factory Charge
(________[A] – 16.4) x 0.54 (________)
BBBBBBBB>%%%@±[ BBBBBBBB
- ________CF x 3.53 - (________)
= ________ Additional Charge (oz.)
Multi F MAX Refrigerant Charge Calculations
Note:
Outdoor Unit Factory Charge lbs. of R410A
LMU481HV 9.26
LMU541HV 9.26
LMU601HV 11.46
Additional charge (lbs.) = (Total Main Piping Length [A] - Chargeless Pipe Length of Main Pipe [L]) x a
7RWDO,QVWDOOHG/HQJWKRI%UDQFK>%%%@±&KDUJHOHVV%UDQFK/HQJWK>%@[E
- CF (Correction Factor) x 3.53
Outdoor Unit Model
Main Piping Length Branch Piping Length
Chargeless Pipe Length
of Main Pipe (L) (ft.)
Additional Charge
Needed (a) (oz./ft.)
Chargeless Pipe Length
of Branch Pipe (ȈB) (ft.)
Additional Charge
Needed (b) (oz./ft.)
LMU481HV 16.4 0.54 131.2 0.22
LMU541HV 16.4 0.54 131.2 0.22
LMU601HV 49.2 0.54 131.2 0.22