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XIII. System Start-up(continued)
c. If low fire O
is too high (CO
2
O
(increase CO
2
clockwise in 1/4 turn increments and check O
(or CO
) after each adjustment. Verify CO air free
2
is less than 200 ppm.
d. Verify O
repeatability by modulating to high and
2
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.
D. Field Conversion of Gas Type
This appliance is factory tested and set up for the
gas type selected but can be field converted with the
following steps.
1. Order a gas conversion kit for the model size being
converted.
a. Gas conversion kits include a mixer and label. See
Table 32 for part numbers.
b. Replace the old mixer with the new one.
2. Connect the new gas supply to the appliance, check
for leaks, and purge the gas line in accordance with
the National Fuel Gas Code, ANSI Z223.1/NFPA
54 and/or Natural Gas and Propane Installation
Code, CAN/CSA B149.1 or the requirements of the
authority having jurisdiction.
3. Adjust the throttle screw towards negative (-)
(clockwise) all the way to the closed position. Then,
open the throttle with the number of turns for the
gas type and model as given in Table 31.
4. Start the appliance using operating instructions in
Figure 25. Even if the gas line has been completely
purged of air, the burner may fail to ignite. If burner
does not light, turn the throttle towards positive (+)
counter-clockwise in 1/4 turn increments, allowing
at least three tries for ignition at each setting, until
ignition is achieved.
5. Use a combustion analyzer and follow the Air/Fuel
adjustment instructions to set up high fire and
low fire.
6. Fill out the gas conversion labels included with the
appliance (Order part number 110301-01 if not
included). Follow the instructions included with the
label for placement.
AMP 400-1000L I&O Manual
is too low), decrease
2
) by turning the offset screw
2
WARNING
Make sure that all adjustments at high fire are
2
made with the throttle, not offset screw.
The offset screw has been factory set using pre-
cision instruments and must never be adjusted in
the field unnecessarily.
Attempting to adjust the offset screw could result
in damage to the gas valve and may cause property
damage, personal injury or loss of life.
This appliance is tested at the factory and adjust-
ments to the air fuel mixture are normally not
necessary. Improper gas valve or mixture adjust-
ments could result in property damage, personal
injury or loss of life.
Table 30: Combustion O
Natural Gas
AMP
%
CO
Model
2
8.8
400
500
8.8
8.8
650
8.8
800
8.8
1000L
Table 31: Approximate Throttle Screw
Position for Gas Types
Number of turns from closed
AMP
Model
400
500
650
800
1000L
Table 32: Gas Conversion Kits
AMP
To Natural Gas
Model
400
500
650
800
1000L
WARNING
/CO
Levels
2
2
LP Gas
%
%
O
CO
2
2
5.2
9.8
5.2
9.8
5.2
9.8
5.2
9.8
5.2
9.8
Natural Gas/Propane Gas
5
1
1
1
1
Part Number
To LP Gas
111545-01
111544-01
111545-02
111544-02
111545-03
111544-03
111545-04
111544-04
111545-05
111544-05
%
O
2
6.0
6.0
6.0
6.0
6.0
57
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