Air Adjustment - Heat Wise SU-3 Manual

Commissioning the Burner
Once installed, a higher or lower firing rate can be achieved by raising or lowering the manifold
pressure by +/- 0.3". Pressure changes can only be made when the burner is running. The typical
working manifold pressure for natural gas is 2.5 to 3.3 Inches of Water Column ("W.C.), or 2.0 to 2.5
"W.C. for propane. Note: When checking manifold pressure, do not subtract burner housing pressure
during valve-on delay. The maximum inlet pressure at the gas valve is 11 "W.C.; the minimum is 5
"W.C. Refer to Charts 5, 6, 7 and 8 on pages 9 and 10
Clock the meter to determine the firing rate. The firing rate should be +/- 3% of the heat
exchanger manufacturers' specifications. Check the heat exchanger manual for further details.
The head is pre-set at the factory for OEM applications. Check your OEM manual for the proper
head setting for that oven. In the case of a conversion or retrofit burner, refer to pages 9, 10 and 11 for
further details. Using a combustion analyzer, check the CO
the air as necessary (See below :)
Head
Adjustment
Turning the Air Adjustment dial clockwise opens the air shutter and increases the air; turning the air
adjustment dial counter-clockwise closes the air shutter and reduces the air.
Using a combustion analyzer, check the following readings:
If CO is greater than 9.5% (O
2
If CO is less than 8.8% (O
2
Carbon monoxide levels should be below 400 ppm; 100 ppm or less is ideal. Check local codes for
emissions requirements. Note: if any adjustments are made, it is important to recheck the firing rate
and combustion analysis.
To light the SU-3/SU-4 Gas Burner
1. Set the thermostat to the lowest temperature
2. The control knob on the gas valve should be in
the "OFF" position for at least five minutes.
3. Rotate the control knob counter-clockwise to the
"ON" position and set the thermostat to the
desired temperature settings
Picture 6
Adjusting the Burner
<3.5%); Open Air Shutter
2
> 5%); Close Air Shutter
2
Lighting Istructions
(or O ) and carbon monoxide levels. Adjust
2 2
Reset, if Flame Lockout Occurs
1. Turn the thermostat off, or turn the main power off
2. Wait five minutes
3. Turn the main power on
To shut the burner off
1. Rotate the control knob on the gas valve to the
"OFF" position
2. Set the thermostat to the lowest temperature
15
Air
Adjustment