Power and cooling equipment 23
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NT8D52AA Blower Unit
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System Hardware-All
Purpose-The
Blower Unit is part of the system cooling assembly and
provides forced-convection cooling. Housed within the pedestal, it contains
two backward-curved impellers (rotor blades) which are cylindrically
shaped, approximately 22.8 cm (9.in) in diameter, and 6.9 cm (2.75 in)
thick.
A
circuit breaker is located on the front of the blower chassis to turn
the unit on and off. Each unit weighs about 1.5 kg (3.5 lbs).
The unit communicates with the power distribution section by engaging a
connector in the rear of the pedestal.
Quantity-One per pedestal in AC systems
NT8D52DC Blower Unit
System Hardware-All
Purpos+This
Blower Unit is the same as the NT8D52AA Blower Unit
except that it is used for DC systems. It has its own separate circuit breaker
located on the Power Distribution Unit. Also, for maintainability in the
field, a switch is located on the front of the blower chassis to turn the unit
on and off.
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Quantity-One per pedestal
in DC systems
NT8D53AB Power Distribution Unit AC
System Hardware-All
Purpose-The
Power Distribution Unit AC distributes power to the entire
column. It is located in the rear of the pedestal. It houses a main circuit
breaker and the System Monitor.
Quantity-One
per pedestal/column in AC systems
Equipment identification and ordering information 553-3001-154
s.
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