Heat Wise SU-3, Manual

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Trouble shooting:
There are three factors to operate the gas burner properly:
1.
Electricity {(main Power 120V/60 Hz /1 Ph) ( secondary 24V)}
2. Gas flow (Incoming pressure should be 10” w.c. with proper gas line without pressure drop
during burner operation).
3. Combustion air.
Check these three items properly before proceeding in detail for other problems.
Condition Solutions
1. Burner motor runs and:
No flame after pre-purge & no fuel indicator (where
applicable)
Check 24V feed to airflow switch & after airflow switch to
control. Fix or replace the airflow switch. If there is no
secondary power, then replace the 24Vtransformer.
No flame, fuel indicator on (where applicable),
faulty ignition transformer or spark separately Check ignition transformer, electrode, cracked electrode or
gap. Fix or replace.
Fenwal control defective after above tests. Replace
Burner locks out after 4 seconds
First, check ionization electrode, ionization cable (for
cracks) and boot. Fix as needed.
Polarity reversed Check power feed for broken polarity
Bad earth grounding Fix the ground wire
Gas pressure is too low Check the gas pressure and adjust to proper pressure
2. Pulsation at start
First, check the burner head location with respect to the end
of the flame tube. Adjust as necessary.
Gas pressure is too high. Use manometer and readjust the pressures.
Blocked Flue Check draft and clear flue of foreign materials.
3. Pulsation during operation
Burner is not correctly adjusted.
Readjust with combustion analyzer.
The burner is dirty. Clean the burner.
Defective chimney Check and change if necessary with liners.
4. Burner locks out
Ionization current is too low.
Check current. Minimum 0.8 micro amps. Check position of
ionization electrode and the condition of the cable.
5. The CO content is too high
Excess air is too high or too low.
Adjust air shutter.
The gas holes are clogged. Clean them.
The fresh air intakes are too small. Check and readjust.
The burner head is out of position. Check and readjust.
6. Condensation in the heat exchanger
Firing Rate is too low.
Increase the firing rate so that the stack temperature is 350
o
F
or HIGHER. Insulate the chimney.
Maintenance Instructions : TO BE FIXED/ATTACHED NEAR BURNER
At least once a year, a qualified service agency needs to be contracted for other than routine maintenance.
1. The blower motor is the only moving part. It does not require lubrication, since the ball bearings
have been permanently lubricated.
2. The user should do periodic visual checks of the burner and the flame.
3. Laundry lint or dog and/or cat hairs should not go inside the blower. If they are seen, they
should be removed after disconnecting the power to the burner and cover parts should be
installed before starting the burner.
4. Keep the area around the conversion burner clear and free from combustible materials, gasoline,
and other flammable vapors and liquids.
. No obstruction for the flow of combustion and ventilating air.