58
AMPW 400-1000L I&O Manual
. System Start-up
(continued)
e. If high fire O
2
is too low (CO
2
is too high), increase
O
2
(decrease CO
2
) by turning the throttle screw
clockwise in 1/4 turn increments and checking the
O
2
(or CO
2
) after each adjustment. Refer to Figure
Figure 29 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 counter-
clockwise 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.
OFFSET SCREW
(ADJUSTMENT NOT
NORMALLY REQUIRED)
THROTTLE SCREW
OUTLET GAS
PRESSURE TAP (P2)
WITH INTERNAL SCREW
INLET GAS
PRESSURE TAP (P1)
WITH INTERNAL SCREW
GAS INLET
VALVE COIL (V2)
VALVE COIL (V1)
4. Begin commissioning the appliance. Visually inspect
flame via sight glass window. On high fire the flame
should be stable and mostly blue. Yellow tips should
not be present; but, intermittent flecks of yellow
and orange in the flame are normal.
5. Test any other external limits or other controls in
accordance with the manufacturer’s instructions
.
6. Verify O
2
(or CO
2
) and CO concentration are within
limits specified in
. Note: the values in
this table are for sea level only. For high altitude
installation, above 2000 ft. consult factory.
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
counter-clockwise in 1/4 turn increments and
checking the O
2
(or CO
2
) after each adjustment.
Refer to Figure 28
Figure 29 for location of
throttle screw. Verify CO air free is less than 200
ppm.
Figure 28: AMP 650-1000L Gas Valve Adjustment
Figure 29: AMP 400-500 Gas Valve Adjustment
Throttle Adjustment
Offset Screw (adjustment
not normally required)
Lift cap to access
throttle screw
