Alliance Laundry Systems DT120CSH, Installation Operation & Maintenance

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56
M413620
AIR FLOW SWITCH
For 120 and 170 Pound Tumblers
The air flow switch is located on the back of the tumbler,
see Figure 25 or 26. It consists of a small limit switch
wired in series with the gas control transformer. A vane,
which is pulled against the tumbler back by normal air
circulation, actuates the switch. When air circulation is
interrupted, (lint door open, clogged lint screen,
inadequate vent, etc.), the vane will not pull in and
energize the gas valve circuits.
IMPORTANT: The tumbler should not be operated if
the air flow switch flutters, turning the gas on and off
rapidly. This can be caused by improper vent, clogged
lint screen, fan motor turning in the wrong direction,
etc.
NOTICE: The access door must be closed before
attempting to adjust air flow switch.
IMPORTANT: Air flow switch vane must remain
closed drying operation. If it opens and closes during
the drying cycle, this indicates insufficient air flow
through the tumbler. If switch remains open, or pops
open and closed during the cycle, the heating system
will shut off. The cylinder and fan will continue to
operate even though the air flow switch is
malfunctioning.
NOTICE: Air flow switch operation may be affected
by a clogged lint screen, lack of make-up air, or
obstructions in the vertical recirculation stack or in
the customer installed main or collector ducts. These
conditions 2ust be checked and necessary corrections
made.