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XIV. System Start-up(continued)
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. 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.
2. Adjust the throttle screw towards negative (-) 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 38.
3. Start the appliance using operating instructions in
Figure 32. 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 (+)
in 1/4 turn increments, allowing at least three tries
for ignition at each setting, until ignition is achieved.
4. Use a combustion analyzer and follow the Air/
Fuel adjustment instructions to set up high fire
and low fire.
5. 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.
!
Make sure that all adjustments at high fire are
made with the throttle, not offset screw.
The offset screw has been factory set using
precision 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
adjustments to the air fuel mixture are normally
not necessary. Improper gas valve or mixture
adjustments could result in property damage,
personal injury or loss of life.
Table 38: Approximate Throttle Screw
Position for Gas Types
Number of turns from closed
AMP
Model
Natural Gas
1000
1250
1500
2000
2500
3000
3500
4000
71
WARNING
WARNING
LP Gas
2
1
2
1
5
2.5
5
2.5
5
2.5
6
3
6
3
6
3
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