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Benchmark 750-3000 Boiler Operation & Maintenance Manual - KOREA
SECTION 2: OPERATION
2.7 TUNING Menu
The Tuning menu items are Factory set for each individual unit. Do not change these menu
entries unless specifically requested to do so by factory-trained personnel.
A full description of each item appears in Appendix A-4.
TABLE 2-5: TUNING Menu
MENU ITEM DISPLAY
1
Prop Band
2
Integral Gain
3
Derivative Time
4
Warmup Prop Band
5
Warmup Int Gain
6
Warmup PID timer
7
Reset Defaults?
2.8 COMBUSTION CAL Menu
The Combustion Cal (Calibration) menu is protected by the level 2 password (6817) which must
be entered to view or change the menu items shown in Table 2-6, 2-7 and 2-8. These menu
items are used to vary the speed of the unit's blower motor based on air temperature and air
density at prescribed Air/Fuel Valve positions (% open). This is accomplished by providing a DC
drive voltage to the motor, which then adjusts the rotational speed of the blower to maximize
combustion efficiency and ensure the unit conforms to the Nitrogen Oxide (NO
Monoxide (CO) emissions specified in the combustion calibration instructions in Section 4.3 of
the Benchmark 750 – 3000 Boiler Installation and Startup Guide Guide, OMM-0127 (GF-205-K).
CAL Voltage values are factory adjusted for each unit prior to shipping, and so may differ from
the defaults shown in the tables below. A full description of each item appears in Appendix A-5.
2.8.1 BMK 750/1000 COMBUSTION CAL Menu
TABLE 2-6: COMBUSTION CAL Menu: BMK 750/1000
MENU ITEM DISPLAY
CAL Voltage 18%
1
CAL Voltage 30%
2
CAL Voltage 45%
3
CAL Voltage 60%
4
CAL Voltage 80%
5
CAL Voltage 100%
6
SET Valve Position
7
Blower Output
8
Set Stdby Volt
9
Oxygen Level
10
OMM-0128 • GF-206-K
• 5/9/2019
MINIMUM
1°F (0.55°C)
0.00
0.0 min
1°F (0.55°C)
0.00
0 sec.
Yes, No, Are You Sure?
MINIMUM
MAXIMUM
0.25
10.00
0.25
10.00
0.25
10.00
0.25
10.00
0.25
10.00
0.25
10.00
0%
100%
Monitor Blower Output Voltage
0 V
10.0 V
0%
25%
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
MAXIMUM
DEFAULT
120°F (66°C)
70°F (38.5°C)
2.00
2.00 min
120°F (66°C)
95 °F (52°C)
2.00
240 sec.
) and Carbon
x
DEFAULT
2.10
2.55
3.10
3.50
4.60
5.60
0%
0.00
2.00
0.0
1.00
0.0min
0.50
20 sec.
No
Page 21 of 146
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