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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
22,000 BTUH burner applications use Table 10 EXAMPLE 2:
Heating value = 1000 Btu/cu ft Specific gravity = 0.62 Therefore: Orifice No. 43* Manifold pressure:
*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
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
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