Start/Stop Levels - Air/Fuel & Energy Input; Bmk 750/1000 Air/Fuel Valve Position And Energy Input - Watts Aerco Benchmark Series Operation And Service Manual

Benchmark Platinum-Edge: Operation-Service Manual
SECTION 3 - START SEQUENCE
3.4 START/STOP LEVELS – AIR/FUEL & ENERGY INPUT
The Tables below show the relationship between the energy input and Air/Fuel Valve position
for the BMK models covered in this document.

3.4.1 BMK 750/1000 Air/Fuel Valve Position and Energy Input

TABLE 3-2a: BMK 750/1000 Air/Fuel Valve Position – NATURAL GAS
AIR/FUEL VALVE
POSITION (%
OPEN)
0%
10%
18% (Stop Level)
20%
30%
40%
50%
60%
70%
80%
90%
100%
TABLE 3-2b: BMK 750/1000 Air/Fuel Valve Position – PROPANE GAS
Air/Fuel Valve
Position (%
Open)
0%
10%
18% (Stop Level)
20%
30% 128,000 (37.5 kW)
40% 373,000 (109.3 kW)
50% 508,000 (148.9 kW)
60% 565,000 (165.6 kW)
70% 621,000 (182.0 kW)
80% 660,000 (193.4 kW)
90% 723,000 (211.9 kW)
100% 750,000 (219.8 kW)
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ENERGY INPUT
(BTU/HR)
BMK 750
0
0
50,000 (14.7 kW)
52,000 (15.2 kW)
108,000 (31.7 kW)
246,000 (72.1 kW)
369,000 (108.1 kW)
465,000 (136.3 kW)
554,000 (162.4 kW)
637,000 (186.7 kW)
733,000 (214.8 kW)
750,000 (219.8 kW)
Energy Input
(BTU/Hr)
BMK 750
0
0
50,000 (14.7 kW
71,000 (20.8 kW)
400,000 (117.2 kW)
562,000 (164.7 kW)
703,000 (206.0 kW)
791,000 (231.8 kW)
865,000 (253.5 kW)
963,000 (282.2 kW)
1,000,000 (293.1 kW)
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BMK 1000
0
0
50,000 (14.7 kW)
54,000 (15.8 kW)
140,000 (41.0 kW)
297,000 (87.0 kW)
443,000 (126.9 kW)
564,000 (165.3 kW)
660,000 (193.4 kW)
789,000 (231.2 kW)
933,000 (273.4 kW)
1,000,000 (293.1 kW)
BMK 1000
0
0
50,000 (14.7 kW
71,000 (20.8 kW)
181,000 (53.0 kW)
BOILER ENERGY
INPUT (% OF FULL
CAPACITY)
BMK 750 BMK 1000
0 0
0 0
6.7% 5%
6.9% 5.4%
14% 14%
33% 30%
49% 44%
62% 56%
74% 66%
85% 79%
98% 93%
100% 100%
Boiler Energy Input
(% of Full Capacity)
BMK 750 BMK 1000
0 0
0 0
6.7% 5.0%
9.5% 7.1%
17% 18%
50% 40%
68% 56%
75% 70%
83% 79%
88% 87%
96% 96%
100% 100%
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