STARTING AND OPERATING INSTRUCTIONS Chapter 5
750-177 5-11
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
14.0
15.0
16.0
17.0
18.0
19.0
20.0
21.0
22.0
23.0
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0
INPUT (M MBtu/hr)
GAS MANIFOLD PRESSURE (INCHES OF H
SIZE 1
SIZE 2
3.0 - 3.5 MMBtu/hr
SIZE 3
5.0 - 6.0 MMBtu/hr
SIZE 3
7.0 - 9.0 MMBtu/hr
SIZE 4
9.0 - 12.0 MMBtu/hr
SIZE 2
3.5 - 4.5 MMBtu/hr
13. Modulate the burner to low fire. The butterfly valve
should be adjusted to provide the correct fuel flow and
pressure at the low-fire position in accordance with the
burner data plate minimum gas-pressure rating.
14. Adjust the low-fire (see Figure 5-9) damper again to
obtain the correct low-fire excess air level within the
range of 3-5% O
2
.
D. BURNER ADJUSTMENTS,
SINGLE FUEL, OIL-FIRED
This section of the manual presents detailed procedures for
initial startup of an oil-fired combustion system.
Note: The operator must consider and allow for
normal variations in air and fuel, which would
reduce the range of excessive oxygen in the
flue gas accordingly.
!
DANGER
CAUTION
This burner is designed to burn only those fuels
shown on the burner data plate. Burning fuels
not specified on the data plate could cause
damage to the equipment.
The following procedures assume that the pre-startup tasks,
checklists, and adjustments have been completed, and that the
boiler system is prepared for initial startup. All necessary test
equipment should be available on site.
!
DANGER
WARNING
Attempting initial burner startup with
insufficient knowledge of the equipment
and startup procedures can result in
serious damage to the equipment. The
operator must be totally familiar with the
entire startup and adjustment process
before attempting to operate the burner.
failure to follow these instructions could
result in serious personal injury or death
NOTES:
1. The excess air set-
ting should be suffi-
cient to allow normal
variations in air and
fuel without abnormal
excess air levels, per
Table 5-1.
2. Do not operate the
burner at firing rates
or fuel pressures
higher than the maxi-
mum, or lower than
the minimum indi-
cated on the burner
specification plate as
shown in Figure 5-8.
Figure 5-10: Natural Gas Input Pressure Curves
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