Central Boiler CLASSIC Owner's Manual page 31

3. Temperature controller set incorrectly - The
temperature controller should not be set above 195°F.
4. Circulation pump not running - The pump should
run continuously to keep water temperature uniform
in furnace while in use.
NOTE: If there is an overheating problem in
extremely warm weather, the furnace can be filled
with a smaller load of wood.
C. SOLENOID DOES NOT OPERATE.
1. Fuse blown - Check the fuse. Check damper and
solenoid area for obstructions or damage. Be sure
the damper door operates properly; then replace the
fuse.
2. Solenoid not operating properly - Solenoid may be
damaged. If so, be sure to check the linkage for free
movement and for creosote buildup between damper
door and draft opening. Replace the solenoid if burned
out or stuck in the open position. The solenoid is an
owner serviceable item (see instructions for
replacement in Maintenance section of this manual).
D. FREQUENT PUMP TROUBLE OR POOR WATER
CIRCULATION.
1. Pump mounted incorrectly - Check to be sure the
pump is mounted either on the furnace or a minimum
of 4 feet lower than the top water level in the furnace
or the highest point of the supply lines between the
furnace and the pump (see Fig. 13-16).
2. Water will not circulate - If the system has been
drained and there is a problem getting the water to
circulate, force water through all lines with water
pressure from pressurized domestic water system,
closing one valve at a time on the furnace to force
water through each line. See Initial Start Up
Procedures section.
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°-
25° F less than hot supply water. Returning water
that is too cold to the furnace may cause erratic
temperature readings. Check for partial air lock or
install larger pump.
F. BURNING AN EXCESSIVE AMOUNT OF WOOD.
1. Excessive heat loss - See 9-11 of Furnace Does Not
Heat section.
2. Air entering through door - See 1 of Furnace Is
Overheating Or Boiling section.
3. 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.
Section 4 - Troubleshooting
4. Water line heat loss - If water lines are buried in wet,
low-lying areas, there may be a large heat loss which
would greatly increase the wood consumption.
5. High volume water heating - High volume water
heating (e.g., car wash, swimming pool, etc.) will
require high wood consumption.
6. High heat demand - Radiant floor heating a concrete
slab that is either poorly insulated or is exposed to
water or cold outside temperatures will require
increased wood consumption. Bringing a concrete
slab up to temperature the first time will take a
considerable amount of time and wood, but once it is
warm, the wood consumption will be reduced if the
concrete and the building are insulated properly.
Section
4
31