Bryant 310JAV, 310AAV warranty Horizontal Left Application-Vent Elbow Left

SEE NOTES: 1,2,4,7,8,9

A02064

Fig. 32—Horizontal Left Application-Vent Elbow Left

SEE NOTES: 1,2,4,5,7,8,9

A02065

Fig. 33—Horizontal Left Application-Vent Elbow Right

then Up

SEE NOTES: 1,2,4,5,7,8,9

A02066

Fig. 34—Horizontal Left Application-Vent Elbow Up

SEE NOTES: 1,2,4,5,7,8,9

A02067

Fig. 35—Horizontal Left Application-Vent Elbow Right

SEE NOTES: 1,2,4,5,7,8,9

A02068

Fig. 36—Horizontal Right Application-Vent Elbow Left

See Venting Notes on Page 26

f. Check and verify burner orifice size in furnace. NEVER ASSUME ORIFICE SIZE. ALWAYS CHECK AND VERIFY.

g.Replace orifice with correct size if required by Table 13 or 14. Use only factory-supplied orifices. See EXAMPLE 2.

22,000 BTUH burner applications use Table 10 EXAMPLE 2: (0–2000 ft altitude)

Heating value = 1000 Btu/cu ft Specific gravity = 0.62 Therefore: Orifice No. 43* Manifold pressure: 3.7-in. wc

*Furnace is shipped with No. 43 orifices. In this example all main burner orifices are the correct size and do not need to be changed to obtain proper input rate.

3.Adjust manifold pressure to obtain correct input rate.

a.Turn gas valve ON/OFF switch to OFF

b.Remove manifold pressure tap plug from gas valve. (See Fig. 40.)

c. Connect a water column manometer or similar device to manifold pressure tap.

d.Turn gas valve ON/OFF switch to ON.

e.Set thermostat to call for heat.

f.Jumper R and W thermostat connections on furnace control board to start furnace.

g.Remove regulator seal cap and turn regulator adjusting screw counterclockwise (out) to decrease input rate of clockwise (in) to increase input rate.

h.Install regulator seal cap.

i.Leave manometer or similar device connected and proceed to Step 4.

NOTE: DO NOT set manifold pressure less than 3.2-in wc or more than 3.8-in. wc for natural gas at sea level. If manifold pressure is outside this range, change main burner orifices or refer Table 10 or 11.

NOTE: If orifice hole appears damaged or it is suspected to have been redrilled, check orifice hole with a numbered drill bit of correct size. Never redrill an orifice. A burr-free and squarely aligned orifice hole is essential for proper flame characteristics.

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