Lennox MMA048S4 User Manual

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15.2. Electric Control Working Environment.
• Input voltage: 230V.
• Input power frequency: 60Hz.
• Indoor fan standard working amp.: <1A
• Outdoor fan standard working amp.: <1.5A.
• Four-way valve standard amp.: <1A
16. Start-Up
16.1. Adding Refrigerant - Single-Zone Systems
The outdoor unit is factory-charged with refrigerant. Calculate the additional refrigerant required according to the
diameter and the length of the liquid pipe between the outdoor unit and indoor unit connections.
Be sure to add the proper amount of additional refrigerant. Failure to do so may result in reduced performance.
NOTE: Interconnecting pipe work between outdoor and indoor units must be 10 ft. or longer.
NOTE: Do not remove refrigerant for line lengths less than 25 ft. R-410A is a blended refrigerant. If you must remove
charge, it is necessary to remove the entire charge and weigh in the new charge.
Table 10. Adding Refrigerant
System Size
(KBtu)
Pipe Length
Amount of Refrigerant
to add
18 >25 (7.5) 0.16 oz/ft (15g/m)
24 >25 (7.5) 0.32 oz/ft (30g/m)
30 >25 (7.5) 0.32 oz/ft (30g/m)
36 >25 (7.5) 0.32 oz/ft (30g/m)
48 >25 (7.5) 0.32 oz/ft (30g/m)
60 >25 (7.5) 0.32 oz/ft (30g/m)
Note: 1/4” = 0.16 oz/ft; 3/8” = 0.32 oz/ft
16.2. Adding Refrigerant - Multi-Zone Systems
The outdoor unit is factory-charged with refrigerant. Calculate the additional refrigerant required according to the
length of the liquid pipe (one way) between the outdoor unit and each indoor unit connection.
Be sure to add the proper amount of additional refrigerant. Failure to do so may result in reduced performance.
NOTE: Interconnecting pipe work between outdoor and indoor units must be 10 ft. or longer.
Do not remove refrigerant for line lengths less than 25 ft. R-410A is a blended refrigerant. If you must remove
charge, it is necessary to remove the entire charge and weigh in the new charge.
Table 1. Adding Refrigerant
System
Pre-charge
Pipe Length
Amount of Refrigerant to add
Two-port 50 ft. (15 m)
0.16 oz [(L1 ft + L2 ft) - 50 ft]
0.005 kg [(L1 m + L2 m) - 15 m]
Three-
port
75 ft. (23 m)
0.16 oz [(L1 ft + L2 ft + L3 ft) - 75 ft] 0.005 kg [(L1 m + L2 m + L3 m) - 23 m]
Four-port 100 ft. (30 m) 0.16 oz [(L1 ft + L2 ft + L3 ft + L4 ft) - 100 ft] 0.005 kg [(L1 m + L2 m + L3 m + L4 m) - 30 m
Five-port 125 ft. (38 m)
0.16 oz [(L1 ft + L2 ft + L3 ft + L4 ft + L5 ft) - 125 ft] 0.005 kg [(L1 m + L2 m + L3 m + L4 m + L5
m) - 38 m]

Lennox MMA048S4 Specifications

General

Brand	Lennox
Model	MMA048S4
Category	Air Conditioner
Language	English