Checking input rate, Heater parts from acf greenhouses, Figure 10 dials of typical gas meter – Modine Manufacturing BAE User Manual
Page 11: Table 3 meter-timing gas
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28
30
35
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60
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80
90
100
120
180
150
129
112
100
90
82
75
69
64
60
51
45
40
36
33
30
26
22
20
18
15
360
300
257
225
200
180
164
150
138
129
120
103
90
80
72
65
60
51
45
40
36
30
720
600
514
450
400
360
327
300
277
257
240
206
180
160
144
131
120
103
90
80
72
60
1800
1500
1286
1125
1000
900
818
750
692
643
600
514
450
400
360
327
300
257
225
200
180
150
11
CHECKING INPUT RATE
Figure 9
Table 5
Orifice Drill Sizes with Decimal Equivalents
Dia.
Dia.
Drill
Decimal
Drill
Decimal
Size
Equivalent
Size
Equivalent
20
.1610
37
.1040
22
.1570
39
.0995
23
.1540
40
.0980
25
.1495
42
.0935
26
.1470
43
.0890
27
.1440
45
.0820
28
.1405
52
.0635
30
.1285
Main Burner Orifices
Table 4
Manifold Pressure & Gas Consumption *
Figure 10
Dials of Typical Gas Meter
Natural
Propane
BTU/Cu. Ft.
1050
2500
No. of
Model
Specific Gravity
0.60
1.53
Orifices
Manifold Pressure In. W.C.
3.5
10.0
CFH
28.6
12.0
Gal/Hr. Propane
–
.33
PAE 30
Sec/cu. ft.
126
300
1
Orifice Drill Size
37
52
CFH
47.6
20.0
PAE 50
Gal/Hr. Propane
–
.55
BAE 50
Sec/cu. ft.
76
180
1
Orifice Drill Size
30
45
CFH
71.4
30.0
PAE 75
Gal/Hr. Propane
–
.82
BAE 75
Sec/cu. ft.
50
120
1
Orifice Drill Size
20
37
CFH
95.2
40.0
PAE 100
Gal/Hr. Propane
–
1.15
BAE 100
Sec/cu. ft.
38
90
2
Orifice Drill Size
30
45
CFH
119.0
50.0
PAE 125
Gal/Hr. Propane
–
1.43
BAE 125
Sec/cu. ft.
30
72
2
Orifice Drill Size
25
42
CFH
138.1
58.0
PAE 145
Gal/Hr. Propane
–
1.64
BAE 145
Sec/cu. ft.
26
62
3
Orifice Drill Size
30
45
CFH
166.7
70.0
PAE 175
Gal/Hr. Propane
–
1.86
BAE 175
Sec/cu. ft.
22
51
3
Orifice Drill Size
27
43
CFH
190.5
80.0
PAE 200
Gal/Hr. Propane
–
2.19
BAE 200
Sec/cu. ft.
19
45
3
Orifice Drill Size
23
40
CFH
214.3
90.0
PAE 225
Gal/Hr. Propane
–
2.46
BAE 225
Sec/cu. ft.
17
40
4
Orifice Drill Size
28
43
CFH
238.1
100.0
PAE 250
Gal/Hr. Propane
–
2.74
BAE 250
Sec/cu. ft.
15
36
4
Orifice Drill Size
25
42
CFH
285.7
120.0
PAE 300
Gal/Hr. Propane
–
3.29
BAE 300
Sec/cu. ft.
13
30
5
Orifice Drill Size
26
43
CFH
333.3
140.0
PAE 350
Gal/Hr. Propane
–
3.84
BAE 350
Sec/cu. ft.
11
26
5
Orifice Drill Size
22
39
CFH
381.0
160.0
PAE 400
Gal/Hr. Propane
–
4.38
BAE 400
Sec/cu. ft.
9
23
6
Orifice Drill Size
23
40
Table 3
Meter-Timing Gas
(Time required for one revolution is charted for various size
meter dials and various rates of gas input in cu. ft. per hour. To
convert to Btuh, multiply by the heating value of the gas used.)
Time for 1
Revolution,
Sec.
1/2 cu. ft.
1 cu. ft.
2 cu. ft.
5 cu. ft.
Input, Cu. Ft. per Hour, When Meter Dial Size is:
*Above gases based on average standards. Units can be furnished
for gases of different values and specific gravities. (Gal./Hr. based
on 60°F. 30" Hg., 91,500 BTU/Gal.) In Canada, refer to rating plate
on side of unit for orifices at high altitude.
“U” TUBE
MANOMETER
LIGHTING
INSTRUCTION &
RATING PLATE
GAS
DESIGNATION
PLATE
PILOT TUBING
OUTLET
PRESSURE TAP
COMBINATION
GAS CONTROL
CONTROL
TRANSFORMER
FAN MOTOR
JUNCTION BOX
FAN GUARD
ECO (ON UNITS
SO EQUIPPED.
SEE NOTE 5 ON
PAGE 16.)
Pilot Orifice Identity Numbers
Pilot Burner
Identity No.
Identity No.
Manufacturer
Natural Gas
Propane Gas
Honeywell
HCR-18 or BCR-18
HBR or BBR-12 or 11
Robertshaw
Johnson
7715
4710
1
8
①
N
1
O
①
P
L
①
As number appears on top of pilot orifice.