Benchmark 2.0 LN Installation, Operation & Maintenance Manual
CHAPTER 4 – INITIAL START-UP
Page
56
of
168
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0046_0J
06/18/2015
Phone: 800-526-0288
GF-123
The combustion calibration control functions will be used to adjust
the oxygen level (%) at air/fuel valve positions of 80%, 60%, 45%,
30% and 16% as described in the following steps. These steps
assume that the inlet air temperature is within the range of 50°F to
100°F.
16. Press the
MENU
key on the front panel of the C-MORE and access the
Setup
menu. Enter
password
6817
and then press the
ENTER
key.
17. Press the
MENU
key on the front panel of the C-MORE until
Combustion Cal Menu
appears on the C-More display.
18.
Press the ▲ arrow key until
SET Valve Position
appears on the C-MORE display.
19. Press the
CHANGE
key.
SET Valve Position
will begin to flash.
20.
Press the ▲ arrow key until the
SET Valve Position
reads
80%
. Press the
ENTER
key.
21.
Next, press the down (▼) arrow key until
CAL Voltage 80%
is displayed.
22. Press the
CHANGE
key and observe that
CAL Voltage 80%
is flashing.
23. The oxygen level at the 80% valve position should be as shown below. Also, ensure that
the carbon monoxide (CO) and nitrogen oxide (NOx) readings do not exceed the values
shown.
Table 4-2: Combustion Oxygen Levels for a
80%
Air/Fuel Valve Position
Oxygen %
± 0.2
Carbon Monoxide
NOx
5.2 %
<100 ppm
<30 ppm
24.
If the oxygen level is not within the specified range, adjust the level using the ▲ and ▼
arrow keys. This will adjust the output voltage to the blower motor as indicated on the
display. Pressing the ▲ arrow key increases the oxygen level and pressing the down ▼
arrow key decreases the oxygen level.
25. Once the oxygen level is within the specified range at 80%, press the
ENTER
key to store
the selected blower output voltage for the 80% valve position.
NOTE
The remaining steps basically repeat the procedures in steps 18 through 25
for valve positions of 60%, 45%, 30% and 18%. However, since oxygen
levels vary, these steps are repeated in their entirety. When performing
these steps, also ensure that the carbon monoxide (CO) and nitrogen oxide
(NOx) readings do not exceed the values shown for each valve position.
26.
Press the ▲ arrow key until
SET Valve Position
appears on the C-MORE display.
27. Press the
CHANGE
key.
SET Valve Position
will begin to flash.
28.
Press the ▼ arrow key until the
SET Valve Position
reads
60%
and press the
ENTER
key.
29.
Press the down ▼ arrow key until
CAL Voltage 60%
is displayed.
30. Press the
CHANGE
key.
CAL Voltage 60%
will begin to flash.
31. The oxygen level at the 60% valve position should be as shown below. Also, ensure that
the carbon monoxide (CO) and nitrogen oxide (NOx) readings do not exceed the values
shown.
