Carrier 58STA Installation, Start-Up, Operating And Service And Maintenance Instructions page 43

Table 13—Orifice Size* And Manifold Pressure For Gas Input Rate (Continued)
(Tabulated Data Based On 21,000 Btuh Per Burner, Derated 4 Percent For Each 1000 Ft Above Sea Level)
AVG GAS
ALTITUDE
HEAT VALUE
RANGE
AT ALTITUDE
(FT)
(BTU/CU FT)
725
750
775
5001
800
to
825
6000
850
875
900
AVG GAS
ALTITUDE
HEAT VALUE
RANGE
AT ALTITUDE
(FT)
(BTU/CU FT)
675
700
725
6001
750
to
7000 775
800
825
850
AVG GAS
ALTITUDE
HEAT VALUE
RANGE
AT ALTITUDE
(FT)
(BTU/CU FT)
650
675
700
7001
725
to
750
8000
775
800
825
AVG GAS
ALTITUDE
HEAT VALUE
RANGE
AT ALTITUDE
(FT)
(BTU/CU FT)
625
650
8001
675
to
700
9000
725
750
775
* Orifice numbers 43 are factory installed
b. Inducer motor.
c. Pressure switch(es).
d. Limit overtemperature switch.
e. Gas valve.
f. Hot surface igniter.
g. Flame-sensing electrode.
h. Flame rollout switches.
i. Remove NOx baffles on low NOx models.
SPECIFIC GRAVITY OF NATURAL GAS
0.58
Orifice Manifold Orifice
No. Pressure No.
43 3.1 43
43 2.9 43
43 2.7 43
43 2.5 43
43 2.4 43
43 2.2 43
43 2.1 43
43 2.0 43
SPECIFIC GRAVITY OF NATURAL GAS
0.58
Orifice Manifold Orifice
No. Pressure No.
43 3.1 43
43 2.9 43
43 2.7 43
43 2.5 43
43 2.3 43
43 2.2 43
43 2.1 43
48 3.7 43
SPECIFIC GRAVITY OF NATURAL GAS
0.58
Orifice Manifold Orifice
No. Pressure No.
43 2.9 43
43 2.7 43
43 2.5 43
43 2.3 43
43 2.1 43
43 2.0 43
48 3.6 48
48 3.3 48
SPECIFIC GRAVITY OF NATURAL GAS
0.58
Orifice Manifold Orifice
No. Pressure No.
43 2.7 43
43 2.5 43
43 2.3 43
43 2.1 43
48 3.7 43
48 3.5 48
49 3.8 48
42
0.60 0.62
Manifold Orifice
Pressure No.
3.2 43
3.0 43
2.8 43
2.6 43
2.5 43
2.3 43
2.2 43
2.1 43
0.60 0.62
Manifold Orifice
Pressure No.
3.2 43
3.0 43
2.8 43
2.6 43
2.4 43
2.3 43
2.1 43
2.0 43
0.60 0.62
Manifold Orifice
Pressure No.
3.0 43
2.7 43
2.6 43
2.4 43
2.2 43
2.1 43
3.7 43
3.5 48
0.60 0.62
Manifold Orifice
Pressure No.
2.7 43
2.5 43
2.4 43
2.2 43
2.0 43
3.6 48
3.4 48
6. Remove screws that fasten the collector box assembly to the
cell panel. Be careful not to damage the collector box. Inducer
assembly and elbow need not be removed from collector box.
7. Disconnect gas line from gas manifold.
→
8. Remove the 5 screws that attach the burner assembly to the
cell panel. The gas valve and individual burners need not be
removed from support assembly.
NOTE: Be very careful when removing burner assembly to avoid
breaking igniter. See Fig. 50 and 51 for correct igniter location.
0.64
Manifold Orifice Manifold
Pressure No. Pressure
3.3 43 3.4
3.1 43 3.2
2.9 43 3.0
2.7 43 2.8
2.5 43 2.6
2.4 43 2.5
2.3 43 2.3
2.1 43 2.2
0.64
Manifold Orifice Manifold
Pressure No. Pressure
3.3 43 3.4
3.1 43 3.2
2.9 43 2.9
2.7 43 2.8
2.5 43 2.6
2.3 43 2.4
2.2 43 2.3
2.1 43 2.1
0.64
Manifold Orifice Manifold
Pressure No. Pressure
3.1 43 3.2
2.8 43 2.9
2.6 43 2.7
2.5 43 2.5
2.3 43 2.4
2.2 43 2.2
2.0 43 2.1
3.6 48 3.7
0.64
Manifold Orifice Manifold
Pressure No. Pressure
2.8 43 2.9
2.6 43 2.7
2.4 43 2.5
2.3 43 2.3
2.1 43 2.2
3.7 43 2.0
3.5 48 3.6