Precision Platform 4022 Scanner
Site Preparation
10/4/07
p/n:
6510020208
2-14
is customer-supplied, either it must be powered with 220VAC or a
separate power source must be wired to the scanner.
2.10.
Providing low pressure purge air
The Precision Platform may require an air purge system providing clean,
dry, cool, low pressure (2.5cm (1in) of water) air supplied by a centrifugal
blower. The purpose of the air is to prevent dust and moist air entry into
the scanner. The air also cools the drive motor and the AC step-down
transformer. An air purge system is required on scanners installed in very
dusty locations (tissue mills) or in ambient temperatures above 55°C
(130°F). The requirements for the purge air are:
•
Humidity: 95% non-condensing
•
Temperature: no warmer than 48°C (120°F)
•
Pressure: 2.5cm (1in) of water, minimum
•
Filtered: source the air from a low-dust location and filtered
The air enters the scanner frame through ducting that must be attached to
the collar at the top of the cable end support, as shown on the installation
drawings. Air flow through the end support escapes through the beams.
The ducting and purge-air system should be provided and set up during
site preparation. The installation drawings show how to assemble and
install the ducting, filters, and a blower. Do not use a smaller diameter
ducting than specified on the installation drawings. Smooth ducting is
preferred over corrugated ducting. A damper must be installed at the duct
attachment point to the scanner.
2.10.1.
Blowers and motors
Install a dustproof blower. It is also important to install a damper at the
blower inlet or in the duct to control air flow. Table 2-3 lists the motors
and blowers recommended by Honeywell.
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