Table of Contents
Advertisement
TABLE 4
SUCTION LINE LENGTH/SIZE VS. CAPACITY MULTIPLIER (R-410A)
1
1
⁄
Unit Size
2
Suction Line
3/4 " I.D.
Connection Size
5/8
Suction Line Run -
3/4*
Feet [m]
Optional
1.00
Standard
25'
1.00
Optional
Optional
0.98
50'
Standard
0.99
Optional
Optional
0.95
Standard
100'
0.96
Optional
Optional
0.92
Standard
150'
0.93
Optional
NOTES:
*Standard
Note: Using suction line larger than shown in chart will result in poor oil return and is not recommended
12
Ton
2 Ton
3/4 " I.D.
5/8
3/4*
—
—
1.00
1.00
—
—
0.98
0.99
—
—
0.95
0.96
—
—
0.92
0.94
—
—
7.5 TUBING CONNECTIONS
Indoor coils have only a holding charge of dry nitrogen. Keep all tube ends sealed
until connections are to be made.
•
Use type "L" copper refrigeration tubing. Braze the connections with accepted
industry practices.
•
Be certain both refrigerant shutoff valves at the outdoor unit are closed.
•
Clean the inside of the fittings before brazing.
•
Remove the cap and schrader core from service port to protect seals from heat
damage.
•
Use an appropriate heatsink material around the copper stub and the service
valves before applying heat.
•
IMPORTANT: Do not braze any fitting with the TEV sensing bulb attached.
•
Braze the tubing between the outdoor unit and indoor coil. Flow dry nitrogen
into a service port and through the tubing while brazing.
•
The service valves are not backseating valves. To open the valves, remove the
valve cap with an adjustable wrench. Insert a 3/16" or 5/16" hex wrench into the
stem. Back out counterclockwise.
•
Replace the valve cap finger tight then tighten an additional 1/2 hex flat for a
metal-to-metal seal.
7.6 LEAK TESTING
•
Pressurize line set and coil through service fittings with dry nitrogen to 150
PSIG maximum. Leak test all joints using liquid detergent. If a leak is found,
relieve pressure and repair.
WARNING
Do not use oxygen to purge lines or pressurize system for leak test.
Oxygen reacts violently with oil, which can cause an explosion resulting in
severe personal injury or death.
1
2
⁄
Ton
3 Ton
2
3/4 " I.D.
7/8 " I.D.
5/8
3/4
3/4*
7/8*
7/8*
—
1.00
1.00
1.00
1.00
1.00
—
0.96
0.98
0.98
0.99
0.99
—
0.94
0.96
0.96
0.97
0.97
—
0.91
0.94
0.93
0.95
0.95
—
1
3
⁄
Ton
4 Ton
2
7/8 " I.D.
7/8 " I.D.
3/4
7/8
7/8*
1 1/8*
—
—
1.00
1.00
1.00
1.00
—
—
0.99
0.99
0.99
0.99
—
—
0.96
0.96
0.98
0.98
—
—
0.94
0.95
0.96
0.96
—
—
5 Ton
7/8 " I.D.
7/8
1 1/8*
—
1.00
1.00
—
0.99
0.99
—
0.97
0.98
—
0.94
0.97
—
Advertisement
Table of Contents
Troubleshooting
