Bryant 478-90 - Manual

ALL WEATHER
HEATING & COOLING UNIT
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478
§ Size 90
PDS 478.90.1 10/11/68
SPECIFICATIONS
This equipment is a gas heating and gas cooling all-weather unit designed for roof-top or ground
level installations.
It makes use of an air-cooled Bryant 90-452 gas-fired water chiller combined with a Bryant
300-378 heating unit conveniently mounted on an integral base for easy installation. 'Tie unit is
rated at 90,000 Btuh cooling and 300,000 Btuh heating input. 'The heating can be modulated to
100,000 Btuh input for natural gas by using a modulating gas control kit, Part No. 60119CO2. The
gas-fired chiller is standard with automatic fuel modulation to save gas under low load conditions.
Installation does not interfere with other building trades. No inside floor space and no special
vents are required. Just set the unit on slab or adequate roof support and connect duct, gas supply
and electric supply. 'The Bryant absorption cycle is already charged and ready for operation.
The weatherproof cabinet is made from heavy gauge zinc-coated steel; the chiller finish is baked-
on enamel, and the conditioned-air section is lined with fiberglass to insulate and assure quiet
operation.
Removable panels allow easy access to all components and controls for both heating and cooling.
Automatic pilot reignition eliminates the need for seirvice calls due to pilot outage; a stainless
chromized steel heat exchanger promises long life .