Burner Operation; Lighting Instructions - Heat Wise SU-2A Manual

To light the SU-2A 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
Before turning the burner on, make sure the proper orifice is installed. Check for gas supply leaks.
Check the wiring diagrams. Install manometers before and after the gas valve; make sure that the
manifold pressure corresponds with the proper orifice and fuel (refer to the charts 3 and 4 on
page 7) . Keep the observation port of the boiler open. Follow the instructions on the nameplate of
the burner to turn it on. Follow the sequence of operations for the control (see page 8).
Head
The air shutter is a mechanical shutter. Do NOT over crank the air shutter. You must use an
analyzer to measure the CO
air shutter. If the CO
2
than 9.8% for Natural Gas or 11.5% for LPG.
If the CO (Carbon Monoxide) is above 100 ppm, there is either too much air or too little air.
Check the CO level and adjust the burner.
2
The retention head is set at the factory. The retention head is 1/8" inside the tube when the
marking reads '22'. There is a full ½" movement for the retention disk to move backward (to
increase secondary air) or forwards (to decrease secondary air). NOTE: the head physically
moves within the blast tube. Do not over crank the head dial. This movement can also be used
to compensate for backpressure in the combustion area, up to 0.3" W.C.

LIGHTING INSTRUCTIONS

1. Turn the thermostat off, or turn the main power off
2. Wait five minutes
3. Turn the main power on
1. Rotate the control knob on the gas valve to the
"OFF" position
2. Set the thermostat to the lowest temperature
3. Turn Main Power Off.

BURNER OPERATION

HEAD AND AIR ADJUSTMENT
Air
When to adjust the Air
(Carbon Dioxide). General rule: if the CO
2
is too high, then open the air shutter. Note: Do NOT set the CO
When to adjust the Retention Head
Reset, if Flame Lockout Occurs
To shut the burner off
To access the head and air adjustment, remove the
black plastic cover from the rear of the housing,
using the supplied 4 mm allen key. The left dial is
the head adjustment dial; the right dial is the air
adjustment dial. These dials can spin 360
times for the head and 32 times for the air.
is too low, then close the
2
higher
2
9
o
; 22