21
Air
Flow Adjustments.
MAINTENANCE
HIGH VOLTAGE !
D
ISCONNECT
ALL
POWER
BEFORE
SERVICING
OR
INSTALLING
THIS
UNIT
. M
ULTIPLE
POWER
SOURCES
MAY
BE
PRESENT
. F
AILURE
TO
DO
SO
MAY
CAUSE
PROPERTY
DAMAGE
,
PERSONAL
INJURY
OR
DEATH
.
WARNING
T
O
PREVENT
PERSONAL
INJURY
OR
DEATH
DUE
TO
IMPROPER
INSTALLATION
,
ADJUSTMENT
,
ALTERATION
,
SERVICE
OR
MAINTENANCE
,
REFER
TO
THIS
MANUAL
. F
OR
ADDITIONAL
ASSISTANCE
OR
INFORMATION
,
CONSULT
A
QUALIFIED
INSTALLER
,
SERVICE
AGENCY
OR
THE
GAS
SUPPLIER
.
WARNING
T
HIS
UNIT
MUST
BE
ISOLATED
FROM
THE
GAS
SUPPLY
PIPING
SYSTEM
BY
CLOSING
ITS
INDIVIDUAL
MANUAL
SHUTOFF
VALVE
DURING
ANY
PRESSURE
TESTING
EQUAL
TO
OR
LESS
THAN
1/2 PSIG.
CAUTION
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