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Section 5 - Troubleshooting
3. Water will not circulate - If the system has been
drained and refilled, or if the system has been opened
for any reason (e.g., replacement of pump, adding
heat exchangers, repairing a leak), the system must
be purged (see Initial Start-up Procedures).
4. Poor water quality - Water with high amounts of
solids, sand or dirt can cause frequent pump failure.
Use softened and/or filtered water.
E. ERRATIC TEMPERATURE READING ON
GAUGE
1. Return water too cold - Water circulation may be
too slow. The return water should be no more than
20°F-25°F less than the hot supply water. If the
water returning to the outdoor furnace is too cold, it
may cause erratic temperature readings. Check for
partial air lock or install larger pump.
F. BURNING AN EXCESSIVE AMOUNT OF
WOOD
1. High volume water heating - High volume water
heating (e.g., car wash, swimming pool, etc.) will
require high wood consumption.
2. Excessive heat loss - See items 9-12 of Outdoor
Furnace Does Not Heat.
3. Air entering through door - See item 1 of Outdoor
Furnace is Overheating.
4. Excessive draft - If a very tall extension is added
to the chimney, the increased draw through the draft
may cause excessive wood consumption. Decreasing
the draft opening may increase efficiency and reduce
wood consumption.
5. Supply and return line heat loss - If supply and
return lines are buried in a wet, low-lying area,
there may be a large heat loss which would greatly
increase wood consumption.
6. High heat demand - Concrete slabs (with radiant
heat) that are poorly insulated or are exposed to water
or cold outside temperatures will require increased
wood consumption (see Hydronic Installations
section). Bringing a concrete slab up to temperature
the first time will take a considerable amount of
time and wood; once warm, wood consumption
will be reduced if the concrete slab and building
are insulated properly. The following will also have
a high heat demand: poorly insulated buildings,
buildings with large amounts of glass windows/
doors, buildings with overhead doors, greenhouses,
uninsulated crawl spaces, outdoor air infiltration and
air leaking through foundation.
G. CONTROLLER LED DISPLAY MESSAGES
1. Controller displays "•oo" or "•--" - Temperature
sensing probe has failed. Replace the temperature
sensing probe. If controller displays same message
after sensing probe has been replaced, replace the
digital temperature controller.
2. Controller displays "•--" or "•Er"; controller
may display erratic readings or incomplete
numbers - Digital temperature controller may have
failed. Replace the digital temperature controller.
H. GAS BURNER IS NOT OPERATING OR NOT
PERFORMING PROPERLY
1. Fuel source empty - Check that the fuel source
(e.g., propane tank) is not empty.
2. Valve closed - Check that the valve on the fuel
source and on the outdoor furnace are open.
3. Control switch turned off - Check that the control
valve on top of the gas valve is turned to the ON
position.
4. Burner tube close-off not opening - Check that
there is power to the damper actuator. Contact your
Central Boiler Dealer or a qualified technician for
further assistance.
5. Gas burner motor not starting - If the gas burner
motor fails to start, check that the damper position
switch is closing. Contact your Central Boiler Dealer
or a qualified technician for further assistance.
6. Gas burner does not light - Refer to the burner
manufacturer's installation and operation manual
for troubleshooting recommendations or contact a
qualified technician for further assistance.
CONTACT A QUALIFIED CENTRAL BOILER DEALER FOR FURTHER ASSISTANCE OR
TO SCHEDULE A SERVICE CALL.
