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Installation Manual – THH
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Section 1 - Receipt & Initial Installation
ELECTRICAL CONNECTIONS
The electrical service to the unit should be compared to the unit nameplate
to verify compatibility. The routing and sizing of all conduit, and the type
and sizing of all wiring and other electrical components such as circuit
breakers, disconnect switches, etc. should be determined by the individual
job requirements and should not be based on the size and/or type of
connection provided on the equipment. All installations should be made in
compliance with all governing codes and ordinances. Compliance with all
codes is the responsibility of the installing contractor. The unit nameplate
lists the unit electrical characteristics such as the required supply voltage,
fan and heater amperage and required circuit ampacities. The unit-wiring
diagram shows all unit and field wiring. Since each project is different
and each unit on a project may be different, the installer must be familiar
with the wiring diagram and nameplate on the unit BEFORE beginning
any wiring. This unit is not acceptable for installation in hazardous/
explosive areas.
CONTROL ENCLOSURE
The optional electrical control enclosure provides access to the electrical
compartment. This compartment houses all electric heat and control
components. Terminal strips are furnished for simple power and control
wiring connections. Multiple knockouts allow wiring entries from either
side of the compartment.
All components furnished for field installation, by either the factory or the
controls contractor should be located and checked for proper function and
compatibility. All internal components should be checked for shipping
damage and all electrical connections should be tightened to minimize
problems during start-up.
Any devices such as fan switches or thermostats that have been furnished
from the factory for field installation must be wired in strict accordance
with the applicable wiring diagrams. Failure to do so could result in
personal injury or damage to components and will void all manufacturers’
warranties.
The fan motor(s) should never be controlled by any wiring or device other
than the factory furnished switch or thermostat/switch combination,
without factory authorization.
All field wiring should be done in accordance with governing codes and
ordinances. Any modification of the unit wiring without factory authorization
will result in voiding of all factory warranties and will nullify any agency listings.
The manufacturer assumes no responsibility for any damages and/or
injuries resulting from improperly field installed or wired components.
TELESCOPING BOTTOM PANEL
The telescoping bottom panel allows for fully recessing the unit while
permitting service access into the ceiling plenum The architectural ceiling
panel is finished with a durable powder coat paint and comes with
different face options.
Portions of the inlet louver not directly below unit inlet may
require covering in the field on applications where
infiltration of ceiling plenum air into space is undesired.
Telescoping skirt and collar assembly must be field adjusted
to assure a proper fit between filter frame and louvered
inlet panel assembly. Refer to assembly submittal drawings
for specific dimensions.
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