Central Boiler Classic CL 4030 Owner's Manual page 43

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.
Incorrect
Junction Box
on bottom
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 MolyArmor
350 Corrosion Inhibitor (p/n 2900630) and fresh 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 Building is Losing Temperature.
3. Air entering though door - See item 1 of Outdoor Furnace is Overheating.
CLASSIC OUTDOOR FURNACE • OWNER'S MANUAL
Water Level
Building to be heated
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.
Correct
Junction Box Junction Box
on side
Ground
Level
© 2018 Central Boiler
Correct
on top
39