70
. System Start-up
(continued)
Natural Gas
LP Gas
AMP
Model CO
2
%
O
2
%
CO
2
%
O
2
%
1000
8.4-9.5
4.0-6.0
9.8-11.1
4.0-6.0
1250
8.4-9.5
4.0-6.0
9.8-11.1
4.0-6.0
1500
8.4-9.5
4.0-6.0
9.8-11.1
4.0-6.0
2000
8.4-9.5
4.0-6.0
9.8-11.1
4.0-6.0
2500
8.4-9.5
4.0-6.0
9.8-11.1
4.0-6.0
3000
8.4-9.5
4.0-6.0
9.8-11.1
4.0-6.0
3500
8.4-9.5
4.0-6.0
9.8-11.1
4.0-6.0
4000
8.4-9.5
4.0-6.0
9.8-11.1
4.0-6.0
C. Combustion Air/Fuel Adjustment
1. For high fire adjustment
a. Lock the appliance in high fire and allow fan speed
and combustion analyzer reading to stabilize
before taking combustion readings. To lock in
high fire, select MAIN MENU >> OPERATION.
Select lock symbol, type password and select
ENTER. From the Operation screen, select
Automatic / Manual Firing Rate Control >>Manual
Modulation. Go back to Operation screen. Then
select High Low >> High.
b. Once high fire rate is reached, adjust the O
2
level
at high fire with all the jackets, including the front
cabinet door, closed.
c. For appliances specified to be less than 20 ppm
NOx adjust O
2
level to approximately 6.0%
(Natural gas).
d. If high fire O
2
is too high (CO
2
is too low),
decrease O
2
(increase CO
2
) by turning the throttle
screw towards the "Plus (+)" sign in 1/4 turn
increments and checking the O
(or CO
2
) after
each adjustment. Refer to Figure 33 for location
of throttle screw. Verify CO air free is less than
200 ppm.
2. For low fire adjustment
a. Lock appliance in low fire and allow fan speed and
combustion analyzer reading to stabilize before
taking combustion readings. To lock in low fire,
select High Low >> Low.
b. If low fire O
2
is too low (CO
2
is too high), increase
O
2
(decrease CO
2
) by turning the offset screw
towards the "Minus (-)" sign in less than 1/8 turn
increments and checking the O
2
(or CO
2
) after
each adjustment. Verify CO concentration is less
than 200 ppm.
c. If low fire O
2
is too high (CO
2
is too low), decrease
O
2
(increase CO
2
) by turning the offset screw
towards the "Plus (+)" sign in 1/4 turn increments
and check O
2
(or CO
2
) after each adjustment.
Verify CO air free is less than 200 ppm.
d. Verify O
2
repeatability by modulating to high and
low fire three times.
e. Once the appliance is operating within the
specified high and low fire ranges, record
emissions, flue draft, and other important data.
f. Compare emission data to the factory emissions
report posted on the back of the front jacket
panel.
3. Return the appliance to Automatic Mode. From
Operation screen, select Automatic / Manual Firing
Rate Control >> Automatic Modulation. Select
HOME to return to the Home Screen.
Table 37: Combustion O
2
/CO
2
Levels
Figure 33: Gas Valve Air/Fuel Adjustment
6. Verify O
2
(or CO
2
) and CO concentration are within
limits specified in Table 37. Note: the values in
this table are for sea level only. For high altitude
installation, above 2000 ft. consult factory.
Throttle Screw for
High Fire Adjustment
Offset Screw for
Low Fire Adjustment
Содержание AMP 1000
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