CHAPTER 3: CONTROL PANEL OPERATION
Page
36
of
158
PR2: 04/22/13
Benchmark 2.0LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
OMM-0052_0E
GF-127
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
•
Ph: 800-526-0288
Table 3-6: Combustion Cal Menu – Natural Gas
Available Choices or Limits
Menu Item Display
Minimum
Maximum
Default
CAL Voltage 20%
.25 Vdc
10.0 Vdc
1.00 Vdc
CAL Voltage 30%
.25 Vdc
10.0 Vdc
2.30 Vdc
CAL Voltage 45%
.25 Vdc
10.0 Vdc
2.9 Vdc
CAL Voltage 60%
.25 Vdc
10.0 Vdc
3.60 Vdc
CAL Voltage 80%
.25 Vdc
10.0 Vdc
5.30 Vdc
CAL Voltage 100%
.25 Vdc
10.0 Vdc
9.10 Vdc
SET Valve Position
0%
100%
0%
Blower Output
Monitor Blower Output Voltage
.00
Table 3-7: Combustion Cal Menu – Propane
Available Choices or Limits
Menu Item Display
Minimum
Maximum
Default
CAL Voltage 21%
.25 Vdc
10.0 Vdc
1.10 Vdc
CAL Voltage 30%
.25 Vdc
10.0 Vdc
1.95 Vdc
CAL Voltage 45%
.25 Vdc
10.0 Vdc
3.00 Vdc
CAL Voltage 60%
.25 Vdc
10.0 Vdc
3.00 Vdc
CAL Voltage 80%
.25 Vdc
10.0 Vdc
4.45 Vdc
CAL Voltage 91%
.25 Vdc
10.0 Vdc
8.20 Vdc
SET Valve Position
0%
91%
0%
Blower Output
Monitor Blower Output Voltage
.00
3.9 START SEQUENCE
When the Control Box
ON/OFF
switch is set to the ON position, it checks all pre-purge
safety switches to ensure they are closed. These switches include:
•
Safety Shut-Off Valve Proof of Closure (POC) switch
•
Low Water Level switch
•
High Water Temperature switch
•
High Gas Pressure switch
•
Low Gas Pressure switch
•
Blower Proof switch
•
Blocked Inlet switch
If all of the above switches are closed, the
READY
light above the
ON/OFF
switch will light
and the unit will be in the Standby mode.
When there is a demand for heat, the following events will occur:
NOTE
If any of the Pre-Purge safety device switches are open,
the appropriate fault message will be displayed. Also, the
appropriate fault messages will be displayed throughout
the start sequence, if the required conditions are not
observed.
