Installation
3-12
Part 1089210A04
E 2010 Nordson Corporation
Internal Blower
Internal blower lamps do not require a cooling air source, however, exhaust
air must be supplied.
Flow of cooling air must not be restricted or impeded, either at the inlet or
the outlet. Use of quartz plates or any type of exhaust restricting devices
must be evacuated to insure adequate cooling air flow.
External Blowers − Cooling Air
An external remote blower is required as a source of cooling air ducted to
each lamphead. The following specifications must be maintained for all
applications at all times or the life of the lamphead will be greatly reduced
with the possibility of failure:
S unimpeded and unrestricted flow of cooling air through the lamphead
S constant static pressure of 5.5-in. water column measured from the
inside of the lamphead to ambient or the lamp face
S 315 CFM of airflow through the lamphead
It is important to size the cooling blower to provide at least an additional
20% of cooling air measured at the cooling duct inlet just prior to the
lamphead. Size the blowers to accommodate all losses in the duct work
and ensure that the specified air flow and pressure are delivered to the
lamphead.
In many applications there will be multiple lampheads obtaining their cooling
air from a common source such as a plenum. In these installations it is
recommended that air flow adjustment dampers be added to the ducting as
close to the lamphead as possible.
After installation of the ductwork, check the static pressure inside each
lamphead with a manometer. Remove one of the cover screws and insert
the manometer probe into the screw hole.
Cooling Exhaust Air − Lamphead/Chamber Cooling Air
Removal
Lamphead cooling air must be exhausted when lampheads are enclosed in
a cure chamber or when the air flow is restricted and/or captured at the
exhaust of the lamphead face.
When lampheads are installed in a cure chamber and the lamphead cooling
air is exhausted to the open air within the chamber you must size the
chamber exhaust system to evacuate at least 130% of air flow into the
lampheads. You must also factor in the capacity to remove all air in the
chamber including air flow into the chamber through all openings, doors,
conveyors, and cracks. The air flow required is the sum of all the
lampheads and openings and must be at a static pressure great enough to
keep a negative pressure in the chamber.
When an Air Shield, Quartz Plate, or any device restricts the lamphead
cooling exhaust air flow, the exhaust system must evacuate at least 130% of
the air flow into the lamphead at a static pressure that ensures that there is
an even flow or a slight negative pressure at the lamp face.
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