Use and Care Manual

61
COMBUSTION SETTINGS
NATURAL GAS LP GAS
FAN
SPEED
LOW HIGH LOW HIGH
CO PPM <60 <200 <60 <200
CO
2
(%) 8 - 10 8 ½ - 10 ½ 9 – 10 ½ 9 ½ - 10 ½
▪ K. SETTING AND VERIFYING THE COMBUSTION SETTING
6. Remove the manometer. Close the screw on the gas inlet pressure tap.
2. When low re settings have been obtained, ip DIP switch seven (7) to its original (OFF) position. This will return the appliance to normal mode.
*3. Flip DIP switch six (6) to ON (high re). Again check combustion readings with a combustion analyzer.
4. When complete, ip DIP switch six (6) to its original (OFF) position. This will return the appliance to normal mode.
5. Allow appliance to operate normally. Ensure it is operating properly.
6. Reinstall the appliance front cover.
7. Use a Phillips Head screwdriver to reinstall the appliance top cover.
*In order to increase CO₂ values on high re, the gas orice size can be increased to achieve the maximum CO₂ value listed in Table 26. Contact
the factory for recommended orice sizes to achieve the desired setting.
Figure 40 – Gas Valve Offset
Screw
Offset Screw
1. After the appliance has red, ip DIP switch seven (7) to the ON position (low re). Proceed to check appliance combustion values.
NOTE: Use a combustion analyzer to ensure CO and CO₂values are within the range shown in Table 26.
LP GAS NATURAL GAS
Minimum Pressure 8.0" WC Minimum Pressure 3.5" WC
Maximum Pressure 14.0" WC Maximum Pressure 10.5" WC
Table 25 – Gas Pressure Requirements
Table 26 – Combustion Settings
WARNING
WARNING
It is required to use a combustion analyzer to verify nal adjustment according to the combustion chart (Table 26). Failure to do so could result in serious personal
injury or death.
It is very important that gas conversion be set within the recommended CO measurements listed in Table 26. Visually looking at the burner does not determine
combustion quality. Failure to measure combustion with a Combustion Analyzer and set the throttle within the recommended CO measurements could result in
property damage, severe personal injury, or death.
If the readings obtained are lower or higher than the combustion readings in Table 26, use a 4mm Allen key to adjust the offset screw in a
clockwise (positive) or counterclockwise (negative) direction (approximately 1/4 turn). See Figure 40. Check your combustion values. Repeat this
procedure until the values obtained on the combustion analyzer agree with those stated in Table 26.
NOTE: If the appliance makes a whistling sound (harmonics) at low re, adjust the offset screw in a clockwise (positive) direction (approximately
1/8 turn). Check your combustion values and ensure they agree with those stated in Table 26 before proceeding.