Payne F Series Installation, Start-Up, And Operating Instructions Manual page 12

TABLE 6—MODEL 480BAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT RATE
(Tabulated Data Based on Altitude Up to 2000 Ft and 22,000 Btuh Per Burner)
GAS
HEAT 0.56
VALUE
Orf Mnfld
(BTU/CU FT)
No. Press.
41 3.2
860 42 3.6
— —
42 3.4
875 — —
— —
42 3.3
890 — —
— —
42 3.2
905 — —
— —
43 3.8
920
— —
43 3.7
935
— —
43 3.6
950
— —
43 3.4
965
— —
44 3.8
980
43 3.3
44 3.7
995
43 3.2
44 3.6
1010
— —
44 3.5
1025
— —
44 3.4
1040
— —
44 3.3
1055
— —
44 3.2
1070
— —
45 3.8
1085
— —
45 3.7
1100
— —
EXAMPLE:
Btu heating input = Btu/cu ft X cu ft/hr
Heating value of gas = 1070 Btu/cu ft
Time for 1 revolution of 2 cu ft dial = 72 sec
Gas rate = 100 X 1070 = 107,000 Btuh
(8.) Measured gas input should not exceed gas input on
unit rating plate.
(9.) Proceed to item c to adjust manifold pressure.
c. Adjust gas input.
(1.) Remove regulator adjustment seal cap. (See Fig.
11.)
(2.) Turn adjusting screw counterclockwise to decrease
input. Turn screw clockwise to increase input. DO
NOT set manifold pressure less than 3.2-in. wc or
more than 3.8-in. wc for natural gas. Make any
major adjustments by changing main burner ori-
fices.
(3.) When correct input is obtained, replace regulator
seal cap. Main burner flame should be clear blue,
almost transparent. (See Fig. 12.)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60
Orf Mnfld Orf Mnfld Orf
No. Press. No. Press. No.
41 3.3 41 3.4 41
42 3.7 42 3.8 40
— — 40 3.2 —
41 3.2 41 3.3 41
42 3.6 42 3.7 42
— — — — 40
42 3.4 41 3.2 41
— — 42 3.6 42
— — — — —
42 3.3 42 3.4 41
— — — — 42
— — — — —
42 3.2 42 3.3 42
— — — — —
43 3.8 42 3.2 42
— — — — —
43 3.7 43 3.8 42
— — — — —
43 3.6 43 3.7 43
— — — — —
42 3.5 43 3.6 43
— — — — —
44 3.8 43 3.5 43
43 3.4 — — —
44 3.7 44 3.8 43
43 3.3 43 3.4 —
44 3.6 44 3.7 43
43 3.2 43 3.3 —
44 3.5 44 3.6 44
— — 43 3.2 43
44 3.4 44 3.5 44
— — — — 43
44 3.3 44 3.4 44
— — — — —
44 3.2 44 3.3 44
— — — — —
45 3.8 44 3.2 44
— 3.4 — — —
0.62 0.64 0.66
Mnfld Orf Mnfld Orf
Press. No. Press. No.
3.5 41 3.7 41
3.3 39 3.2 39
— 40 3.4 40
3.4 41 3.5 41
3.8 40 3.3 39
3.2 — — 40
3.3 41 3.4 41
3.7 42 3.8 40
— — — —
3.2 41 3.3 41
3.6 42 3.7 42
— — — —
3.4 41 3.2 41
— 42 3.5 42
3.3 42 3.4 41
— — — 42
3.2 42 3.3 42
— — — —
3.8 42 3.2 42
— — — —
3.7 43 3.8 42
— — — —
3.6 43 3.7 43
— — — —
3.5 43 3.6 43
— — — —
3.4 43 3.5 43
— — — —
3.7 43 3.4 43
3.3 — — —
3.6 44 3.8 43
3.2 43 3.3 —
3.5 44 3.7 44
— 43 3.2 43
3.4 44 3.6 44
— — — 43
3.4 44 3.5 44
— — — —
d. High altitude—In the United States gas input on rating
plate is for altitudes up to 2000 ft. Ratings for altitudes
over 2000 ft must be 4 percent less for each 1000 ft
above sea level. To obtain the adjusted altitude rating,
adjust the manifold pressure (see item c) and replace the
main burner orifices as needed. Refer to National Fuel
Gas Code Appendix F, Table F-4 for proper orifice
sizing at high altitudes.
e. Canadian installations only—The Canadian ratings are
approved for altitudes up to 2000 ft for natural and
propane gases. High-altitude ratings are from 2000 ft to
4500 ft above sea level. See Table 8 for nominal burner
orifice size. High-altitude rating includes a 10 percent
derate as required by Canadian standards.
—12—
0.68 0.70
Mnfld Orf Mnfld Orf Mnfld
Press. No. Press. No. Press.
3.8 39 3.4 38
3.3 40 3.6 39
3.5 — — 40
3.6 41 3.8 39
3.2 39 3.3 40
3.4 40 3.5 —
3.5 41 3.6 41
3.2 40 3.3 39
— — — 40
3.4 41 3.5 41
3.8 40 3.2 40
— — — —
3.3 41 3.4 41
3.7 42 3.8 40
3.2 41 3.3 41
3.5 42 3.7 42
3.4 41 3.2 41
— 42 3.5 42
3.3 42 3.4 41
— — — 42
3.2 42 3.3 42
— — — —
3.8 42 3.2 42
— — — —
3.7 43 3.8 42
— — — —
3.6 43 3.7 43
— — — —
3.5 43 3.6 43
— — — —
3.4 43 3.5 43
— — — —
3.8 43 3.4 43
3.3 — — —
3.7 44 3.8 43
2.3 43 3.3 —
3.6 44 3.7 44
— 43 3.2 43
0.72
Orf Mnfld
No. Press.
3.2 38 3.3
3.5 39 3.6
3.7 40 3.8
3.3 38 3.2
3.6 39 3.4
— 40 3.7
3.7 41 3.8
3.2 39 3.3
3.4 40 3.5
3.6 41 3.7
3.3 39 3.2
— 40 3.4
3.5 41 3.6
3.2 40 3.3
3.4 41 3.5
3.8 40 3.2
3.3 41 3.4
3.6 42 3.7
3.2 41 3.3
3.5 42 3.6
3.4 41 3.2
— 42 3.5
3.3 42 3.4
— — —
3.2 42 3.3
— — —
3.8 43 3.2
— — —
3.7 43 3.8
— — —
3.6 43 3.7
— — —
3.5 43 3.6
— — —
3.4 43 3.5
— — —
3.8 43 3.4
3.3 — —