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6. Connect the suction and liquid lines, using a brazing
compound. Braze with an alloy of silver or copper and
phosphorus with a melting point above 1,100°F (593ºC).
NOTE: Do not use soft solder.
7. Make sure indoor coil has been put in place according to the
Installation Instructions and is connected to the refrigerant
lines.
8. Replace valve cores.
9. Pressurize the lines and indoor coil with a pressure not to
exceed 20 psi.
10. Leak test the lines with a pressure not to exceed 20 psig.
11. Evacuate the indoor coil and lines to a minimum of
500 microns to remove contamination and moisture, then
disconnect the vacuum pump.
12. Open the suction and liquid service valves fully.
13. Insulate the suction line with refrigerant line insulation
material of ¹⁄₄" (6.4 mm) or more wall thickness.
14. Pack insulating material around refrigerant lines where they
penetrate the structure to protect the lines and to minimize
vibration transmission.
A
A. Insulating material around refrigerant lines
Suction Line Sizes
Installations exceeding 74 ft (22.6 m) are not recommended.
Condensing
Unit Tons
Line Set Size—inches (cm) OD
⁵⁄₈ (1.6)
1.5
⁵⁄₈ (1.6)
2
⁵⁄₈ (1.6)
2.5
³⁄₄ (1.9)
3
⁷⁄₈ (2.2)
3.5
⁷⁄₈ (2.2)
4
⁷⁄₈ (2.2)
5
Line Set
Less than
Length
25 ft (7.6 m)
6
³⁄₄ (1.9)
³⁄₄ (1.9)
³⁄₄ (1.9)
³⁄₄ (1.9)
³⁄₄ (1.9)
⁷⁄₈ (2.2)
⁷⁄₈ (2.2)
1¹⁄₈ (2.9)
1¹⁄₈ (2.9)
1¹⁄₈ (2.9)
1¹⁄₈ (2.9)
1¹⁄₈ (2.9)
1¹⁄₈ (2.9)
1¹⁄₈ (2.9)
25 ft (7.6 m) to
50 ft (15.2 m) to
49 ft (14.9 m)
74 ft (22.6 m)
Liquid Line Sizes
Installations exceeding 74 ft (22.6 m) are not recommended.
Condensing
Unit Tons
Line Set Size—inches (cm) OD
¹⁄₄ (0.6)
1.5
¹⁄₄ (0.6)
2
¹⁄₄ (0.6)
2.5
³⁄₈ (1)
3
³⁄₈ (1)
3.5
³⁄₈ (1)
4
³⁄₈ (1)
5
Line Set
Less than
Length
25 ft (7.6 m)
Make Electrical Connections
WARNING
Goodman 31
To avoid the risk of injury, electrical shock or death, the
furnace must be electrically grounded in accordance with
local codes or, in their absence, with the latest edition of the
National Electric Code (NEC).
IMPORTANT:
Electrical wiring, disconnect means and over-current
protection are to be supplied by the installer. Refer to the
rating plate for the maximum over-current protection,
minimum circuit ampacity, and operating voltage. See wiring
diagrams later in this section.
Install an adequately sized branch circuit disconnect,
according to the NEC, within sight of and readily accessible
from heat pump.
The cable or conduit and fittings connected from the
disconnect to the heat pump shall be rated for outdoor use.
³⁄₈ (1)
³⁄₈ (1)
³⁄₈ (1)
³⁄₈ (1)
³⁄₈ (1)
³⁄₈ (1)
³⁄₈ (1)
³⁄₈ (1)
³⁄₈ (1)
³⁄₈ (1)
³⁄₈ (1)
³⁄₈ (1)
³⁄₈ (1)
³⁄₈ (1)
25 ft (7.6 m) to
50 ft (15.2 m) to
49 ft (14.9 m)
74 ft (22.6 m)
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