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 TM 5-6640-213-14
4-12.
PURGING BLOWER (EXHAUST FAN).
a.
Check that exhaust louvers open and close.
Check that baffle plate, fan guard and attaching hardware are
b.
secure.
c.
Check that fan is activated when switch (S3) is energized.
d. Check that fan operates and louvers open to exhaust position
when zero adjust shaft is turned clockwise to energize the gas alarm
system.
A troubleshooting chart for the fan is
e. Troubleshooting.
listed in table 3-2.
4-37/(4-38 blank)
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