Orifice Size And Manifold Pressure - Payne PG96VAT Installation, Start-Up, Operating And Service And Maintenance Instructions

Table 21 – Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate
(TABULATED DATA BASED ON 20,000 BTUH HIGH-HEAT / 13,000 BTUH LOW-HEAT PER BURNER,
ALTITUDE
A V G . G A S
RANGE
HEAT VALUE
AT ALTITUDE
ft (m)
(Btu/cu ft)
900
0 925
(0) 950
975
to 1000
1025
2000 1050
(610) 1075
1100
U.S.A. 800
2001 (611) 825
to 850
3000 (914) 875
900
Canada 925
2001 (611) 950
to 975
4500 (1372) 1000
775
3001 800
(915) 825
850
to
875
4000 900
(1219) 925
950
750
4001 775
(1220) 800
825
to
850
5000 875
(1524) 900
925
725
5001 750
(1525) 775
800
to
825
6000 850
(1829) 875
900
675
6001 700
(1830) 725
750
to
775
7000 800
(2133) 825
850
TWO-STAGE FURNACE
DERATED 2%/1000 FT (305M) ABOVE SEA LEVEL)
S P E
0.58
Orifice Mnfld Press Orifice Mnfld Press Orifice Mnfld Press Orifice Mnfld Press
No. High/Low No.
43 3.8 / 1.6 42
43 3.6 / 1.5 43
43 3.4 / 1.4 43
44 3.7 / 1.6 44
44 3.5 / 1.5 44
44 3.3 / 1.4 44
44 3.2 / 1.3 44
45 3.7 / 1.6 45
46 3.7 / 1.6 46
42 3.4 / 1.4 42
43 3.8 / 1.6 42
43 3.6 / 1.5 43
43 3.4 / 1.4 43
44 3.7 / 1.6 44
44 3.5 / 1.5 44
44 3.3 / 1.4 44
44 3.2 / 1.3 44
46 3.8 / 1.6 45
42 3.3 / 1.4 42
43 3.8 / 1.6 42
43 3.6 / 1.5 43
44 3.8 / 1.6 43
44 3.6 / 1.5 44
44 3.4 / 1.4 44
44 3.2 / 1.4 44
45 3.7 / 1.6 44
42 3.3 / 1.4 42
43 3.7 / 1.6 43
43 3.5 / 1.5 43
44 3.8 / 1.6 43
44 3.5 / 1.5 44
44 3.3 / 1.4 44
44 3.2 / 1.3 44
46 3.8 / 1.6 45
42 3.2 / 1.4 42
43 3.7 / 1.5 43
43 3.4 / 1.4 43
44 3.7 / 1.6 44
44 3.5 / 1.5 44
44 3.3 / 1.4 44
45 3.7 / 1.6 44
46 3.7 / 1.6 46
42 3.4 / 1.4 42
42 3.2 / 1.3 42
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
46 3.8 / 1.6 45
73
C F I C I G R A V T I Y O F N A T U R A L
0.60 0.62
High/Low No. High/Low
3.2 / 1.4 42 3.3 / 1.4
3.7 / 1.6 43 3.8 / 1.6
3.5 / 1.5 43 3.6 / 1.5
3.8 / 1.6 43 3.4 / 1.5
3.6 / 1.5 44 3.8 / 1.6
3.5 / 1.5 44 3.6 / 1.5
3.3 / 1.4 44 3.4 / 1.4
3.8 / 1.6 44 3.3 / 1.4
3.8 / 1.6 45 3.8 / 1.6
3.5 / 1.5 42 3.6 / 1.5
3.3 / 1.4 42 3.4 / 1.4
3.7 / 1.6 42 3.2 / 1.3
3.5 / 1.5 43 3.7 / 1.5
3.8 / 1.6 43 3.5 / 1.5
3.6 / 1.5 44 3.8 / 1.6
3.4 / 1.5 44 3.6 / 1.5
3.3 / 1.4 44 3.4 / 1.4
3.8 / 1.6 44 3.2 / 1.4
3.4 / 1.4 42 3.5 / 1.5
3.2 / 1.4 42 3.3 / 1.4
3.7 / 1.6 43 3.8 / 1.6
3.5 / 1.5 43 3.6 / 1.5
3.7 / 1.6 43 3.4 / 1.4
3.5 / 1.5 44 3.7 / 1.5
3.4 / 1.4 44 3.5 / 1.5
3.2 / 1.3 44 3.3 / 1.4
3.4 / 1.4 42 3.5 / 1.5
3.8 / 1.6 42 3.3 / 1.4
3.6 / 1.5 43 3.7 / 1.6
3.4 / 1.4 43 3.5 / 1.5
3.7 / 1.5 44 3.8 / 1.6
3.5 / 1.5 44 3.6 / 1.5
3.3 / 1.4 44 3.4 / 1.4
3.7 / 1.6 44 3.2 / 1.4
3.3 / 1.4 42 3.4 / 1.5
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 / 1.5
3.6 / 1.5 44 3.7 / 1.6
3.4 / 1.4 44 3.5 / 1.5
3.2 / 1.3 44 3.3 / 1.4
3.8 / 1.6 45 3.8 / 1.6
3.5 / 1.5 42 3.6 / 1.5
3.3 / 1.4 42 3.4 / 1.4
3.7 / 1.6 43 3.8 / 1.6
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 / 1.4 44 3.4 / 1.4
3.8 / 1.6 44 3.2 / 1.4
G A S
0.64
No. High/Low
42 3.4 / 1.4
42 3.2 / 1.4
43 3.7 / 1.6
43 3.6 / 1.5
43 3.4 / 1.4
44 3.7 / 1.6
44 3.5 / 1.5
44 3.4 / 1.4
44 3.2 / 1.4
42 3.7 / 1.6
42 3.5 / 1.5
42 3.3 / 1.4
43 3.8 / 1.6
43 3.6 / 1.5
43 3.4 / 1.4
44 3.7 / 1.6
44 3.5 / 1.5
44 3.3 / 1.4
42 3.6 / 1.5
42 3.4 / 1.4
42 3.2 / 1.4
43 3.7 / 1.6
43 3.5 / 1.5
44 3.8 / 1.6
44 3.6 / 1.5
44 3.4 / 1.4
42 3.6 / 1.5
42 3.4 / 1.4
43 3.8 / 1.6
43 3.6 / 1.5
43 3.4 / 1.4
44 3.7 / 1.6
44 3.5 / 1.5
44 3.3 / 1.4
42 3.5 / 1.5
42 3.3 / 1.4
43 3.8 / 1.6
43 3.5 / 1.5
44 3.8 / 1.6
44 3.6 / 1.5
44 3.4 / 1.4
44 3.2 / 1.4
42 3.8 / 1.6
42 3.5 / 1.5
42 3.3 / 1.4
43 3.7 / 1.6
43 3.5 / 1.5
44 3.7 / 1.6
44 3.5 / 1.5
44 3.3 / 1.4
A11252A