Groen BPM-30S, Руководство оператора

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10 OM-BPM/BPP-G
Sequence of Operation
The following "action-reaction" outline is provided to help the user understand how the equipment functions.
A. Standard Models with Spark Ignition
1. When the power switch is turned on, it starts the
spark igniter and opens the automatic valve for the
pilot burner. The spark ignites a pilot flame, which
heats the sensor. The sensor then sends a signal to
turn off the spark. The flame thereafter acts as a
standing pilot until the power is turned off.
2. If the pilot flame is not sensed within 70 seconds after
spark begins, a timer shuts down the entire operation.
To attempt a second trial for ignition, turn off the
power switch. Check the gas supply valves and wait
five minutes before trying again by switching power
on. If there is still no pilot flame in four tries, close all
valves, turn off the power, and contact an authorized
Groen Service Agency.
3. When the operator sets a temperature on the
thermostat, it allows the automatic gas valve to admit
gas to the main burners, where it is ignited by the pilot
flame. When the braising pan reaches the set
temperature, the thermostat switch opens. This stops
the signal to the gas control valve and shuts off gas to
the main burner. The pilot flame remains lit. When
the pan cools below the set temperature, the
thermostat switch closes and starts another cycle.
On and off cycling continues and maintains the pan at
the desired temperature. This action is indicated by
the Heat indicator light.
B. Models with Optional Standing Pilot Ignition
1. When the operator presses down the knob on the
Combination Gas Control Valve and turns it to “Pilot”,
gas is admitted to the pilot burner. Depressing the
knob in this position overrides the automatic control,
which otherwise shuts off all gas supply when the
thermopile is cold. Lighting and maintaining the pilot
flame for sixty seconds heats the thermopile to
operating temperature, so the thermopile begins to
provide electric current at 750 millivolts. Electricity
from the thermopile powers the control circuit and the
Combination Gas Control Valve. When the thermopile
begins operating at full capacity, the knob may be
released.
2. When the knob is turned to “ON”, the automatic valve
for the main burner is able to open. Setting the
thermostat to call for heat causes the thermostat to
send a signal to the valve, which opens and admits
gas to the main burner. Gas from the main burner is
ignited by the pilot flame. When the pan reaches the
set temperature, the thermostat switch opens,
stopping the signal to the main burner valve and
causing the valve to close. When the pan cools below
the set temperature, the thermostat switch closes and
starts another heating cycle. On-off cycling
continues and maintains the pan at the desired temperature.
C. All Models
1. The thermostat controls heating by alternately
calling for flames at the full capacity of the main
burners and then signaling the control to shut the
burner off completely. Because the control works
in this “all or nothing” way, the pan heats as fast as
it can until it reaches the set temperature. Turning
the thermostat dial to a higher temperature will
cause heating to continue longer, until the pan
reaches the higher temperature, but it cannot make
the pan heat any faster.
2. The pans are protected from overheating by a
secondary thermostat. If the pan temperature rises
above 425º F, the thermostat causes the automatic
gas control valve to close. When the pan cools, the
thermostat automatically resets and permits normal
operation to continue.
3. The tilt switch will shut off all burners whenever the
braising pan is tilted 10 degrees or more from the
horizontal.
4. A gas pressure regulator, which controls gas
pressure at the burner manifold is built into the gas
control valve.
5. On manual tilt models, turning the tilting handwheel
turns a worm gear, which turns a gear wheel on one
of the trunnions which support the pan body.
Turning the gear wheel produces the tilting action.
6. On power tilt models, pressing the up/down switch
operates a gear motor which turns worm and gear
wheel as described in item 5 above.
NOTE: Neither model will heat (operate) when the
braising pan has been tilted 10 degrees or
more from the horizontal.
OM-BPM-G