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2.0 INSTALLATION
2.1 Mechanical
Installation
The Model 5474/5474A/5474L is designed for vertical mounting,
but may also be mounted horizontally if insulation is added to the
rear of the unit. (Since heat rises and the distance between the
heater and the mounting surface will be only 1.5" (4 cm) the
mounting surface will be hotter than with the vertical mount. If a
plastic surface is used and the heater is run at maximum
temperature the distortion temperature of the material may be
exceeded.)
The standard system requires 4, #8-32 screws for mounting. The
hole pattern is a 12”x12” (30.5 cm) square. The mounting hole
diameters are .188” (5 mm). The 5474L requires 6, #8-32 screws
in which the mounting holes measure 15.875” vertically and 11.5”
from the center hole to the outside holes.
The Model 5474 enclosure is mounted directly against the surface.
If insulation is used it should be cut to the full dimensions of the
enclosure.
The Model 5474A has a ¼” (6 mm) thick foam rubber gasket. If
insulation is used it should be cut so that it fits inside the gasket.
When tightening the mounting screws, compress the gasket
approximately 50%, or whatever the insulation used allows. If the
insulation is thicker than ¼” (6 mm) then cut it the size of the
enclosure and mount the enclosure on the surface.
2.2 Wiring
The Model 5474 with an AC fan incorporates IEC power input
modules that accept the standard IEC power cord. The inputs are
labeled as follows:
Front:
Heater
Center Fan
Rear
AC
Accessory
The system is configured at the factory for either 115 VAC/60 Hz or
230 VAC/50 Hz operation. However, the AC Accessory outlet must
remains the standard North American type for 230 VAC units. It is
suggested that a power strip corresponding to the power plugs
