Bryant 352MAV Installation, Start-Up, And Operating Instructions Manual page 42

TABLE 10—MODEL 352MAV ORIFICE SIZE AND HIGH/LOW-HEAT MANIFOLD PRESSURE FOR CORRECT INPUT (CONT.)
(TABULATED DATA BASED ON 20,000/13,000 BTUH PER BURNER, DERATED 2 PERCENT FOR EACH 1000 FT ABOVE SEA
ALTITUDE AVG GAS
RANGE HEAT VALUE
(FT) (BTU/CU FT)
725
750
775
800
4001
825
to
850
5000
875
900
925
950
ALTITUDE AVG GAS
RANGE HEAT VALUE
(FT) (BTU/CU FT)
700
725
750
775
800
825
5001
to 850
6000
875
900
925
950
975
1000
ALTITUDE AVG GAS
RANGE HEAT VALUE
(FT) (BTU/CU FT)
650
675
700
725
6001
750
to
775
7000
800
825
850
875
* Orifice numbers shown in shading are factory installed.
NOTE: Percents of derate are based on midpoints of U.S. altitude ranges.
i. When correct input is obtained, replace caps that conceal
gas valve regulator adjustment screws. Main burner
flame should be clear blue, almost transparent. (See Fig.
54.)
j. Remove jumper R-to-W1 and W2.
CAUTION: DO NOT redrill orifices. Improper drilling
(burrs, out-of-round holes, etc.) can cause excessive
burner noise and misdirection of burner flames. This can
result in flame impingement of burners and heat exchang-
ers causing failures.
3. Verify Natural Gas Input Rate By Clocking Gas Meter.
FOR USE WITH 060 THROUGH 120 SIZE FURNACES ONLY
0.58 0.60
Orifice Manifold Orifice
no. Pressure no.
43 3.7/1.5 43
44 3.4/1.4 43
44 3.7/1.6 44
44 3.51.5 44
44 3.2/1.4 44
45 3.5/1.5 45
45 3.3/1.4 45
45 3.3/1.4 45
47 3.7/1.6 45
47 3.5/1.5 47
0.58 0.60
Orifice Manifold Orifice
no. Pressure no.
43 3.6/1.5 43
43 3.4/1.4 43
44 3.6/1.5 44
44 3.4/1.4 44
44 3.2/1.3 44
45 3.6/1.5 45
45 3.4/1.4 45
45 3.2/1.4 45
47 3.6/1.5 47
47 3.4/1.4 47
48 3.7/1.6 48
48 3.5/1.5 48
48 3.3/1.4 48
0.58 0.60
Orifice Manifold Orifice
no. Pressure no.
42 3.2/1.3 42
43 3.6/1.5 43
44 3.8/1.6 43
44 3.6/1.5 44
44 3.3/1.4 44
45 3.8/1.6 44
45 3.5/1.5 45
45 3.3/1.4 45
47 3.7/1.6 45
47 3.5/1.5 47
LEVEL)*
SPECIFIC GRAVITY OF NATURAL GAS
0.62
Manifold Orifice Manifold
Pressure no. Pressure
3.8/1.6 42 3.2/1.4
3.5/1.5 43 3.7/1.5
3.8/1.6 43 3.4/1.4
3.6/1.5 44 3.7/1.6
3.4/1.4 44 3.5/1.5
3.8/1.6 44 3.3/1.4
3.6/1.5 45 3.7/1.6
3.4/1.4 45 3.5/1.5
3.2/1.4 45 3.3/1.4
3.6/1.5 45 3.2/1.3
SPECIFIC GRAVITY OF NATURAL GAS
0.62
Manifold Orifice Manifold
Pressure no. Pressure
3.7/1.6 42 3.2/1.3
3.5/1.5 43 3.6/1.5
3.7/1.6 43 3.4/1.4
3.5/1.5 44 3.6/1.5
3.3/1.5 44 3.4/1.4
3.7/1.6 44 3.2/1.4
3.5/1.5 45 3.6/1.5
3.3/1.4 45 3.4/1.5
3.7/1.6 45 3.3/1.4
3.5/1.5 47 3.7/1.5
3.8/1.6 47 3.5/1.5
3.6/1.5 48 3.8/1.6
3.5/1.5 48 3.6/1.5
SPECIFIC GRAVITY OF NATURAL GAS
0.62
Manifold Orifice Manifold
Pressure no. Pressure
3.3/1.4 42 3.4/1.4
3.7/1.6 43 3.8/1.6
3.4/1.5 43 3.6/1.5
3.7/1.6 44 3.8/1.6
3.4/1.5 44 3.6/1.5
3.2/1.4 44 3.3/1.4
3.7/1.5 45 3.8/1.6
3.4/1.5 45 3.6/1.5
3.2/1.4 45 3.4/1.4
3.6/1.5 45 3.2/1.3
NOTE: Be sure all pressure tubing, combustion-air and vent
pipes, and burner enclosure front are in place when checking input
by clocking gas meter.
a. Calculate high-altitude adjustment (if required).
UNITED STATES
At altitudes above 2000 ft, this furnace has been ap-
proved for a 2 percent derate for each 1000 ft above sea
level. See Example and Table 11 for derate multiplier
factor.
CANADA
At installation altitudes from 2001 to 4500 ft, this
—42—
0.64 0.66
Orifice Manifold Orifice
no. Pressure no.
42 3.3/1.4 42
43 3.8/1.6 42
43 3.5/1.5 43
44 3.8/1.6 43
44 3.6/1.5 44
44 3.4/1.4 44
44 3.2/1.3 44
45 3.6/1.5 45
45 3.4/1.5 45
45 3.3/1.4 45
0.64 0.66
Orifice Manifold Orifice
no. Pressure no.
42 3.3/1.4 42
43 3.7/1.6 43
43 3.5/1.5 43
44 3.7/1.6 43
44 3.5/1.5 44
44 3.3/1.4 44
45 3.8/1.6 44
45 3.6/1.5 45
45 3.4/1.4 45
45 3.2/1.3 45
47 3.6/1.5 47
47 3.4/1.4 47
48 3.7/1.6 48
0.64 0.66
Orifice Manifold Orifice
no. Pressure no.
42 3.5/1.5 42
42 3.2/1.4 42
43 3.7/1.6 43
43 3.4/1.4 43
44 3.7/1.6 44
44 3.4/1.5 44
44 3.2/1.4 44
45 3.7/1.6 45
45 3.5/1.5 45
45 3.3/1.4 45
Manifold
Pressure
3.4/1.4
3.2/1.4
3.7/1.5
3.4/1.4
3.7/1.6
3.5/1.5
3.3/1.4
3.8/1.6
3.6/1.5
3.4/1.4
Manifold
Pressure
3.4/1.4
3.8/1.6
3.6/1.5
3.4/1.4
3.6/1.5
3.4/1.4
3.2/1.4
3.7/1.5
3.5/1.5
3.3/1.4
3.7/1.6
3.5/1.5
3.8/1.6
Manifold
Pressure
3.6/1.6
3.3/1.4
3.8/1.6
3.5/1.5
3.8/1.6
3.5/1.5
3.3/1.4
3.8/1.6
3.6/1.5
3.4/1.4