Maytag 111990" Automatic Dryers Service Manual page 64

contacts are closed. Valve 2 cannot
open with the radiant sensor contacts
closed.
The booster coil and the igniter are
also wired in parallel. Note that while
these two components are in parallel
with each other, they are wired in
series with the radiant sensor and sec-
ondary coil combination. When the
radiant sensor contacts are closed, full
line voltage is available to the booster
coil and to the igniter. When the
radiant sensor contacts open current
has to flow through the secondary coil
on Valve 2 in order to get to the
booster coil and to the igniter. A signif-
icant voltage drop develops across the
secondary coil. While the parallel
booster coil and igniter are still in the
circuit, they become ineffective due to
the greatly reduced voltage available to
them.
Operation: Dryer controls calling for
heat.
PHASE I
Power reaches the valve assembly by
means of the Molex wiring connector.
The black valve harness wire is
normally the "hot" side of the line and
the red is normally the neutral side of
the line and is completed through the
motor centrifugal switch.
\
Radiant sensor contacts clo~ed.
The holding coil, booster coil and
igniter all receive line voltage. The
holding coil and booster coil develop
ED/GD401 1090
the necessary magnetic pull to open
Valve 1. The igniter, operating at line
voltage, begins to get very hot. The
heat radiated by the igniter affects the
element of the radiant sensor.
IGNITER
Because the secondary coil on Valve 2
is bypassed by the radiant sensor con-
tacts, Valve 2 remains closed and pre-
vents the release of gas.
PHASE
/I
The igniter is now hot and Valve NO.1
is open. With the igniter hot, two things
occur:
1. As the igniter is heated, its resist-
ance decreases.
2. The heat from the igniter causes the
radiant sensor switch to open.
SECTION 3. SERVICE PROCEDURES
3-36