AERCO BMK 2.0 LN Dual Fuel Nov 2010 - Manual (Page 33)

CONTROL PANEL OPERATING PROCEDURES
3-11
3.10 START/STOP LEVELS
The start and stop levels are the Air/Fuel Valve
positions (% open) that start and stop the unit,
based on load. These levels are Factory preset
as follows:
Natural Gas Propane
Start Level: 25% 25%
Stop Level: 20% 21%
Normally, these settings should not require
adjustment.
Note that the energy input of the boiler is not
linearly related to the Air/Fuel Valve position.
Refer to Table 3-8 for the relationship between
the energy input and valve open position (%) for
a unit running on natural gas.
Table 3-8.
Relationship Between Air/Fuel Valve Position and Energy Input For Unit Running On Natural Gas
Air/Fuel Valve Position
(% Open)
Energy Input
(BTU/Hr)
Boiler Energy Input
(% of Full Capacity)
0 0 0
10% 0 0
20%
(Stop Level) 105,000 5.0%
30% 325,000 16%
40% 590,000 30%
50% 830,000 42%
60% 1,030,000 52%
70% 1,210,000 61%
80% 1,440,000 72%
90% 1,750,000 88%
100% 2,000,000 100%