Harman Coal Stoker VF3000 - Manual (Page 17)

17
3-90-70741R13_05/13
Verti-Flow™ Stoker Control
danger- risk of Fire or explosion;
DO NOT burn garbage, gasoline, drain
oil or other flammable liquids.
CautIOn- hot while in Operation;
- Keep Children Away
- Do Not Touch
how to operate the Stoker Control
There are four operator interfaces on the Stoker Control. The
operator interfaces are: one (1) rocker switch and three (3)
16-position rotary switches.
The rocker switch is a power switch that controls only the
coal feeder motor. For normal operation this switch should
be placed in the “on” position. This switch’s operation can be
verified by a small red light above the coal feeder receptacle
being on when the switch is on. The off position is used for
lighting the fire.
The other three switches are the customer’s adjustments for
the timers (on timer, off time, distribution blower time). These
switches can adjust each timer individually from 1 minute to
15 minutes in 1 minute increments. Do not set pilot mode
timers to 0.
The “on” time and the “off’ time should be programmed
to a minimum time that keeps the coal burning during the
maintenance cycling mode. The distribution blower time
should be set to 0. This is because the VF 3000 doesn’t have
a distribution blower. The Verti-Flow™ Stoker Control is also
used on the Magnum Stoker which does use this timer.
Recommended timer settings to start are: “on” 4 minutes, “off”
12 minutes, extend timer 0 minutes. You may find that these
settings produce too much heat in pilot mode. If so, you can
reduce the “on” time and increase the “off” time. However,
we do not recommend going below 4 minutes with the on
time for efficiency reasons.
the Verti-Flow™ Stoker Control
The top receptacle (0.5 A) provides power to the coal feeder
motor. Thus, the plug from the coal feeder motor should be
inserted into this receptacle.
The center receptacle (0.75 A) provides power for the
combustion blower motor. Thus, the plug from the combustion
blower should be inserted into this receptacle. The bottom
receptacle (1.25 A) is not used.
The thermostat connections on the back panel of the stoker
control are .25 inch male quick connect terminals. The
mating connectors (supplied) should be .25 inch female
quick connector terminals. The wire should be no smaller
than 22 gauge.
The thermostat connections should be connected to the
aquastat as shown on the wiring diagram.
The AC power cord should be the last connection made. The
power cord should be plugged into a 115 VAC / 60 hertz wall
outlet, which has proper grounding available. This 115 AC
volt wall outlet should also be capable of handling 3 amps
of current because this is the maximum amperage this unit
will draw.