Harman DVC-500, Installation & Operating Manual

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Motors
Fuel
The DVC500 is designed to burn Anthracite
Rice Coal, which is approximately 3/8" long and
wide by 3/16 thick. Anthracite coal is considered
either White Ash or Red Ash.
White Ash Coal will have 13 to 14,000 btu's
per lb. White ash coal usually has less ash and will
burn longer.
Red Ash coal is usually about 12,000 btu's per
lb. and is higher in volatiles. Higher volatiles makes
the coal easier to light and produces a more yellow
flame. At a very low burn rate the TCP (Temperature
Control Probe) may be activated with Red Ash coal,
especially if the hopper lid is open or leaking. The
TCP senses the temperature of the feeder and feeds
coal if the temperature rises too much. This prevents
the fire from reaching the coal in the hopper. Red Ash
Coal may form klinkers (fused together ash) which
may cause grate blockage in severe cases.
Anthracite Coal can be purchased in bags or in
bulk. If you buy in bulk, try to have the coal delivered
before temperatures reach the freezing level. This is
because salt may be added to the coal to keep it from
freezing on the truck. This will not affect burning but
will promote rust and corrosion.
Some Coal Companies wash their coal better
than others to remove fines and dirt. This makes air
flow through the coal better and produces less fly
ash.
Good, clean, White Ash Coal is the fuel of
choice, "however" Red Ash Coal will also burn well.
As long as it is
Anthracite.
Distribution
Blower
3-21-22647
Draft Motor
3-21-08639
Feed Motor
3-20-60906
ESP Probe
3-20-00744
Fig. 28
Combustion
Blower
1-10-08332