final bid specs 09328.pdf - Freese and Nichols, Inc.

will occur as a result of overflow from the equipment drain pan or stoppage in the condensate
drain piping. One of the following methods shall be used.
1. An auxiliary drain pan with a separate drain shall be provided under the coils on which
condensation will occur. The auxiliary pan drain shall discharge to conspicuous point of
disposal to alert occupants in the event of a stoppage of the primary drain, The pan shall
have a minimum depth of 1.5 inches (38 mm), shall not be less than 3 inches (76 mm)
larger than the unit of the coil dimensions in width and length and shall be constructed of
corrosion-resistant material. Metallic pans shall have a minimum thickness of not less
than 0.0276 (0.7 mm) galvanized sheet metal. Nonmetallic pans shall have a minimum
thickness of not less than 0.0625 inch (1.6mm).
E. Electric Coil: Helical, nickel-chrome, resistance-wire heating elements with refractory ceramic
support bushings; automatic-reset thermal cutout; built-in magnetic contactors; manualreset
thermal cutout; airflow proving device; and one-time fuses in terminal box for overcurrent
protection.
F. Fan and Motor: Centrifugal fan, directly driven by multispeed, electric motor with integral
overload protection; resiliently mounted.
G. Filters: Permanent, cleanable 80-85% efficient located in return air grille.
2.03 AIR-COOLED, COMPRESSOR-CONDENSER COMPONENTS
A. Casing: Steel, finished with baked enamel, with removable panels for access to controls,
weep holes for water drainage, and mounting holes in base. Provide brass service valves, fittings,
and gage ports on exterior of casing.
B. Compressor: Hermetically sealed with crankcase heater and mounted on vibration isolation.
Compressor motor shall have thermal- and current-sensitive overload devices, start capacitor,
relay, and contactor.
1. Compressor Type: Scroll.
2. Two-speed compressor motor (if scheduled) with manual-reset high-pressure switch and
automatic-reset low-pressure switch.
C. Refrigerant Coil: Copper tube, with mechanically bonded aluminum fins, complying with
ARI 210/240, and with liquid subcooler.
D. Fan: Aluminum-propeller type, directly connected to motor.
E. Motor: Permanently lubricated, with integral thermal-overload protection.
F. Low Ambient Kit: Permits operation down to 0 deg F.
2.04 ACCESSORIES
A. Thermostat: Low voltage, programmable electronic thermostat, with the following features:
1. Password protected 7-day program with night setback and instant override for 1 to 3 hour
(adjustable) operation
2. Digital display indicating:
a. Day of week
b. Room temperature
c. Operating Mode
Split System Air Conditioning Units 23 81 26 - 3
DPR09328