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CLASSIC EDGE OUTDOOR FURNACE • OWNER'S MANUAL
5. Pulse set to run too long and/or too often in a low heat draw situation -
Increase the time between idle pulses of air and/or decrease the amount of time
the pulse is provided (see FireStar operating instructions).
6. FireStar controller set incorrectly - Refer to FireStar operating instructions.
F. FREQUENT PUMP TROUBLE OR POOR WATER CIRCULATION
1. Pump mounted incorrectly - If the pump is not mounted on the outdoor
furnace, it must be mounted at a minimum of four feet lower than the top water
level in the outdoor furnace.
4 ft. (1.2 m) min.
Pump must be installed
in the hot supply line,
before the heat exchanger,
and may be located inside
this building or on the
outdoor furnace.
Water Level
Building to be heated
Ground
Level
© 2014 Central Boiler
Make sure the pump motor is installed in a horizontal position. The junction box
must not be located below the pump motor. If necessary, remove the four screws
and rotate the pump body.
2. 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).
3. Poor water quality - Water with high amounts of solids, sand or dirt can cause
frequent pump failure. Use softened and/or filtered water.
4. Deposits in water lines/heat exchanger walls - If water high in silica or other
mineral content has been used, material deposits may build up on the insides of
the supply and return lines and on the heat exchanger walls. If this occurs, the
system will need to be drained and then cleaned using Sludge Conditioner (p/n
166). The system must then be refilled with the proper amount of Corrosion
Inhibitor Plus (p/n 1650) and fresh water.
G. 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.
