iii
Caution Statements
The following equipment cautions appear in the text and are repeated here for
emphasis.
On page 3.
On page 3.
On pages 4 and 12.
On pages 4, 7 and 12.
On pages 13 and 17.
On page 17.
On page 18.
CAUTION
Check the electrical code for proper ac hookup prior to operation of the unit.
Make sure the neutral or return hookup is only used for that purpose.
CAUTION
Do not block air flow. The air intake vents on the side of the heat exchanger and
the exhaust on top must not be obstructed.
CAUTION
Use only distilled water or ethylene glycol as coolant. Do not use tap water,
automotive antifreeze, sealants, or leak stopping material. Use of these
materials will damage the instrument and void all warranties.
CAUTION
Operation without sufficient coolant will damage the unit.
CAUTION
Due to the complexity of the Bird Power Sensor, field repairs beyond general
maintenance should not be attempted. Removal or disturbance of the power
sensor cover can result in cancellation of lifetime warranty.
CAUTION
The Bird 4421 must be powered off when connecting or disconnecting the power
sensor from the power meter.
CAUTION
Failure to install a properly rated fuse may result in damage to equipment or
nuisance failure.
