Advertisement
ALIGNMENTS
AND ADJUSTMENTS,
Continued
Ovens _,_,rith Pilotless Electric Ignition:
Glow Bar Ignition System (-7 Models)
System
Operation
The glow-bar
ignition
system
consists
of three
main components:
1. The thermostat
(or range control).
2, The glow-bar
ignitor.
3, The oven
gas valve
(also
called
the safety
valve).
The thermostat,
ignitor and gas valve are wired
in series.
NORTON
GLOWBAR
When
the
thermostat
knob
is turned
to
a
selected
setting,
this closes
a set of electrical
contacts
in the thermostat
applying
pow'er to the
series circuit.
With power
applied,
the ignitor begins
to heat.
The
electrical
resistance
of the
ignitor
will
decrease
as the
surface
temperature
of the
ignitor increases.
Current
flowing
in the
circuit
increases
in
proportion
to the drop in ignitor resistance.
The NORTON
ignitor
limits the operating
current flow' in the circuit to 3.3 to 3.6 amps.
When the current has risen high enough
to open
the valve, the surface
temperature
of the ignitor
is between
1800 to 2500 degrees
F.
As gas flows
out of the
valve
and
into
the
burner
a portion
of the gas flow's across
the hot
ignitor and ignition
occurs.
SERIES
IGNITOR/VALVE
CIRCUIT
The
ignitor
will
remain
energized
when
the
burner
is lit. Once the oven reaches
the selected
temperature,
the thermostat
contacts
will open
and
remove
power
from
the
ignitor/valve
circuit.
The
valve
will then
close
after
a few
seconds
and the burner
flame will go out.
Pressure
Regulator
PRESSURE
REGULATOR
The pressure
regulator,
located
on the left side of the range, at the inlet of the gas range
piping system,
serves
two functions.
1. Controls
the flow of gas to the gas piping
system.
It maintains
a constant
pressure
of
4" water column
on natural
gas and for LP gas, if equipped,
10" of water column.
2. Incorporates
a "shut-off"
valve
on some
models
on the gas supply
system.
This
valve, located
on the opposite
side of the oven supply tube incorporates
a small "lever."
When this lever is "up",
no gas will flow to the oven. When "down"
oven gas is on. If
the ignitor
glow's and the oven won't come on, check this valve.
NOTE:
Sealed burner
models
have a "shut-off"
located
at the safety valve in the rear of
the broiler
area. Turn the handle on the brass valve fully clockwise
to close off gas.
2O
Advertisement
