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ENVISION CONSOLE INSTALLATION MANUAL
Unit Startup Notes
Emergency Electric Resistance Heat
A factory-installed emergency electric heater package is
available. Rated for 2,000 watts on models NC09 through
NC12 and 3,000 watts on models NC15 through NC18.
The heater package consists of ni-cad elements, ceramic
insulators, and thermal limit switches. A concealed, chassis
mounted rocker switch controls the heater mode operation
and allows the field installation of an aquastat for boilerless
unit operation.
Electrical Disconnect
Field installed on the optional chassis back plate, the con-
sole disconnect provides a permanent electrical connection
to the main electrical supply branch. Wiring between the
disconnect and the unit chassis is field supplied and allows
the electrical power source to the chassis to be interrupted
for unit servicing.
Non-Fused
Constructed of heavy gauge galvanized steel, the
rocker style disconnect switch provides reliable electri-
cal control. Wiring pigtails, using 12-gauge wires, are
factory installed to simplify field wiring.
Fused
Similar in construction to the non-fused electrical
disconnect. The fused disconnect is available in five
models with equipment rated fuses to provide addi-
tional circuit protection. The fuses are panel mounted
to allow easy inspection and removal without removing
the cover on the disconnect.
CFD-10 - 10 amp rated fuse
CFD-12 - 12 amp rated fuse
CFD-15 - 15 amp rated fuse
CFD-20 - 20 amp rated fuse
CFD-25 - 25 amp rated fuse
Motorized Outside Air Damper
A field installed motorized outside air damper is available
to allow the introduction of fresh air into the conditioned
space through an outside vent. The damper motor is pow-
ered by 24 volts with a spring-close design in the event of
a power failure. The damper blade and housing are con-
structed of aluminum for corrosion resistance and the blade
includes a neoprene gasket to prevent air infiltration during
off cycles. The damper assembly is installed on the optional
chassis back plate and a two-wire low voltage connection
simplifies wiring. A concealed, chassis mounted rocker
switch allows the damper to be disabled
Hydronic Loop Controller for
Boiler/Tower Installations
The hydronic loop controller is a microprocessor based
control panel for control of water loop heat rejector (tower),
heat supplier (boiler), and/or water well pumps and circula-
tion pumps. Includes audible and visual alarms, temperature
indication, and add-on options of low switches, remote
alarm sensor wells and pump alternator.