Envision Peripherals IM1609 10, IM1609 08 Unit Startup Notes, Emergency Electric Resistance Heat

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.

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.

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

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