Filter
Top Products
10
12
14
16
18
20
22
24
26
28
30
35
40
45
50
55
60
70
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 SpecificGravity 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
R
obertshaw
Johnson
7715 4710
1 8
①
N
1 O
①
P
L
① As number appears on top of pilot orifice.
Heater Parts from ACF Greenhouses