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For Models with DSI Module (Type I)
Theory of Operation: Start the drying cycle. When the
gas burner ignites within the chosen trial for ignition time
(6-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
"LOCKOUT" 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 3 retries/trials (the initial try and 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 "LOCKOUT" (L.E.D. diagnostic indicator
flashes).
A steady L.E.D. indicator indicates normal operation. No
L.E.D. indicator indicates a power or an internal failure has
occurred.
For Models with DSI Module (Type II)
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
"LOCKOUT" 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 3 retries/trials (the initial try and 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 "LOCKOUT" (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.
113229 - 25
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 keypad 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.
Discontinue power to dryer before attempting to reset
hi-limit.
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WARNING
!
25
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