REFRIGERANT LINE LENGTH (ft)
COND
0 - 24
25 - 49
50 - 85
UNIT
Line Diameter (in. OD)
(TONS) Suct
Liq
Suct
Liq
Suct
Liq
1.5
3/4"
3/8"
3/4"
3/8"
3/4"
3/8"
2
3/4"
3/8"
3/4"
3/8"
3/4"
3/8"
2.5
3/4"
3/8"
7/8"
3/8"
7/8"
1/2"
3
3/4"
3/8"
7/8"
3/8"
1-1/8" 1/2"
3.5
7/8"
3/8" 1-1/8"
3/8"
1-1/8" 1/2"
4
7/8"
3/8" 1-1/8"
3/8"
1-1/8" 1/2"
5
7/8"
3/8" 1-1/8"
3/8"
1-1/8" 1/2"
Table 2
— 4 —
REFRIGERANT HANDLING
• Warning! Do not sniff or inhale refrigerant. Personal injury or death may occur.
• Warning! Avoid contact with liquid refrigerant. Wear gloves and safety glasses to avoid frost-
bite and blindness.
• Warning! Never apply flame to refrigerant cylinder. Possible explosion resulting in personal
injury or death is possible.
• Warning! Never fill a cylinder more than 80% full of liquid refrigerant.
• Always recover refrigerant. EPA requires all refrigerant to be recovered.
• Warning! Always use EPA certified testing equipment and certified refrigerant tanks. Make
sure tanks have passed a hydrostatic test performed in last 5 years.
Outdoor unit
Max. 50ft
Max. "X"ft
Indoor unit
Outdoor unit
Must be above top of
condenser coil
Gas line
at each 35ft
Oil trap
6"
Indoor unit
Liquid line
Must be above top of
condenser coil
LINE SET INSTALLATION
• Verify proper diameter sizes for liquid line and vapor
lines.
• Long line sets may require larger diameter vapor line
(See Table 2).
• The maximum line set length is listed in Table 3. Refer
to Figure 2 for dimension measurement.
• The factory oil charge is sufficient for Max. length in
table 3.
• Caution! Same line sets may require longer
than maximum. length listed in table 3, please
contact your wholesaler or/and distributor
before installation.
• Indoor unit may be a maximum of 50 feet above out-
door unit (See Figure 2).
• For every 35 feet that the outdoor unit is above the
indoor unit, an oil trap must be installed (See Figure 3).
• Vapor line must be insulated (See Figure 4).
• Insulate liquid line if ambient temperatures exceed
120˚F
• Liquid and vapor lines must not make metal-to-metal
contact.
• Avoid unnecessary turns.
Fig. 3
Fig. 2
Insulated vapor Line
Liquid Line
Tape
Sheet Metal Hanger
Incorrect
Correct
Fig. 4
COND UNIT LENGTH "X"
(TONS)
IN FT MAX.
1.5
75
2
85
2.5
85
3
85
3.5
85
4
85
5
85
Table 3
