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GUIDE SPECIFICATIONS — 569D072-120, 576C120 (cont)
J. Special Features:
1. Low-Ambient Temperature Control Accessory:
Low-ambient control shall be available as a factory-
installed option or a field-installed accessory and
shall regulate speed of condenser-fan motor in
response to the saturated condensing temperature
of the unit. The control shall maintain correct con-
densing pressure at outdoor temperatures down to
–20 F (fan motor change required for 569D and
576C units).
2. Optional Condenser Coil Materials:
a. Pre-Coated Aluminum-Fin Coils:
Shall have a durable epoxy-phenolic coating to
provide protection in mildly corrosive coastal envi-
ronments. Coating shall be applied to the alumi-
num fin stock prior to the fin stamping process to
create an inert barrier between the aluminum
fin and copper tube. Epoxy-phenolic barrier shall
minimize galvanic action between dissimilar
metals.
b. E-Coated Aluminum-Fin Coils:
Shall have a flexible epoxy polymer coating uni-
formly applied to all coil surface areas without
material bridging between fins. Coating process
shall ensure complete coil encapsulation. Color
shall be high gloss black with gloss requirements
of 60° of 65-90% per ASTM D523-89. Uniform dry
film thickness from 0.8 to 1.2 mil on all surface
areas including fin edges. Superior hardness char-
acteristics of 2H per ASTM D3363-92A and cross
hatch adhesion of 4B-5B per ASTM D3359-93.
Impact resistance shall be up to 160 in./lb (ASTM
D2794-93). Humidity and water immersion resis-
tance shall be up to a minimum of 1000 and
250 hours respectively (ASTM-D2247-92 and
ASTM D870-92). Corrosion durability shall be con-
firmed through testing to no less than 1000 hours
salt spray per ASTM B117-90. Coil construction
shall be aluminum-fins mechanically bonded to
copper tubes.
3. Thermostat Control Accessory:
a. Commercial Electronic Thermostat with 7-day
timeclock, auto-changeover, multi-stage capabil-
ity, and large LCD temperature display.
b. Commercial Electronic Non-programmable Ther-
mostat with auto-changeover, multi-stage capacity,
and large LCD display.
4. Hail Guard Accessory:
Hail guard package shall protect coils against dam-
age from hail and other flying debris.
5. Condenser Coil Grille Accessory:
Grille shall add decorative appearance to unit and
protect condenser coil after installation.
6. Electric Solenoid Unloader Accessory:
Electric unloader valve piston, coil, and hardware
shall be supplied to convert the pressure-operated
compressor unloader to electric unloading (576C120
only).
7. Unit-Mounted, Non-Fused Disconnect Switch:
Shall be factory-installed, internally mounted. NEC
and UL approved non-fused switch shall provide unit
power shutoff. Shall be accessible from outside the
unit and shall provide power off lockout capability.
Not to be used when rooftop electrical rating
exceeds 80 amperes.
8. Convenience Outlet:
Shall be factory-installed and internally mounted
with easily accessible 115-v female receptacle. Shall
include 15 amp GFI receptacle with independent
fuse protection. Voltage required to operate conve-
nience outlet shall be provided by a factory-installed
step-down transformer. Shall be accessible from out-
side the unit.
50TFQ004-012
569D072-120, 576C120, 569F120