Multi F Outdoor Condenser Installation Manual

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MULTI F / MULTI F MAX Outdoor Unit Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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MULTI
F
MAX
MULTI
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Multi F MAX Systems
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• Number of installed length of branches depends on system specifications.
• CF = Maximum number of connectible indoor units – Total number of connected indoor units
Figure 103: Multi F MAX Additional Refrigerant Charge Example.
FINAL INSTALLATION PROCEDURES
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
Additional charge (lbs.) = (Total Main Piping Length [A] - Chargeless Pipe Length of Main Pipe [L]) x a
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- CF (Correction Factor) x 3.53
B3
18,000 9,000 9,000
LMU481HV
• Total main pipe (A) = 60 ft.
• Each branch pipe
B1 =
B2 =
B3 =
B4 =
B5 =
Additional Charge
= (60 - 16.4) x 0.54
+ (116 - 131.2) x 0.22
– (8 - 5) x 3.53
= 9.61 oz.
A
49 ft.
17 ft.
17 ft.
10 ft.
23 ft.
BD Unit
BD Unit
9,000 18,000
A
A
B1 B2
B4 B5