113242-3
27
Manual Reset Burner Hi-limit
Instructions __________________________
Phase 7
This dryer was manufactured with a manual reset burner
hi-limit thermostat, which is monitored by the Phase 7
computer. If the burner hi-limit is open prior to the start of the
drying cycle, the dryer will start momentarily and then shut
down, the Phase 7 computer will display “BURNER HIGH
LIMIT FAULT” with an audio indication.
If the burner hi-limit opens during a drying cycle, the Phase 7
computer will also display the same error code described
above, along with an audio indication. If the drum temperature
is above 100° F (38° C), the dryer will continue to run with no
heat for 3 minutes or until the drum temperature has dropped
below 100° F (38° C). The clear/stop button on the Phase 7
keyboard (touch pad) must be pressed to clear the error
condition. The open burner hi-limit must be reset “manually”
prior to the start of the next cycle.
Dual Timer
This dryer was manufactured with a manual reset burner
hi-limit thermostat. If the burner hi-limit is open prior to the
start of the drying cycle, or during the cycle, the dryer will not
recognize the open state of the burner hi-limit and will start
or continue through the drying cycle with no heat. Manual
reset hi-limit must be reset manually.
This hi-temperature condition may be caused due to a
restricted exhaust, poor airflow, or improper burner operation.
The location of the burner hi-limit is on the right side of the
burner box, looking at the burner from the back of the dryer.
Warning
Discontinue power to dryer before attempting to
reset hi-limit.
!
(light emitting diode [L.E.D.] diagnostic indicator flashes).
A steady light emitting diode (L.E.D.) indicator indicates
normal operation.
No L.E.D. indicator indicates a power or an internal failure
has occurred.
For Models with Fenwal Controls Direct Spark
Ignition (DSI) Module (128937)
Theory of Operation
– Start the drying cycle. When the
gas burner ignites within the chosen trial for ignition time
(8-seconds), the flame sensor detects gas burner flame and
signals the DSI module to keep the gas valve open as long
as there is a call for heat. The DSI module will “LOCK OUT”
if the gas burner flame is not sensed at the end of the trial for
ignition period. The trial for ignition period will be repeated
for a total of three (3) retries/trials (the initial try and two [2]
more retries/trials). If the flame is not sensed at the end of
the third retry/trial (inter-purge period of 30-seconds), the DSI
module will “LOCK OUT” (a red L.E.D. diagnostic indicator
will flash).
An unlit red L.E.D. diagnostic indicator indicates normal
operation.
A lit green L.E.D. diagnostic indicator indicates dryer controller
is calling for heat and that all interlocks have been satisfied.
