Carrier 50JZ Product Data page 30

Guide specifications (cont)
K. Motors:
1. Compressor motors shall be of the refrigerant-
cooled type with line-break thermal and current
overload protection.
2. All fan motors shall have permanently lubricated
bearings, and inherent, automatic reset, thermal
overload protection.
3. Outdoor fan motor shall be totally enclosed.
L. Grille
1. Louvered Grille:
Louvered grille shall be standard on all units.
M. Special Features Available
1. ICM FIOP:
Integral control motor for indoor blower shall be a
factory installed option for optimizing comfort lev-
els in all operating modes and increasing system ef-
ficiency.
2. Coil Options:
Shall include factory-installed optional copper/
copper and vinyl-coated refrigerant coils.
3. Economizer:
a. Economizer controls capable of providing free
cooling using outside air.
b. Equipped with low leakage dampers not to ex-
ceed 3% leakage, at 1.0 in. wg pressure differen-
tial.
c. Spring return motor shuts off outdoor damper on
power failure.
4. Flat Roof Curb:
Curbs shall have seal strip and a wood nailer for
flashing and shall be installed per manufacturer's
instructions.
5. Manual Outdoor Air Damper:
Package shall consist of damper, birdscreen, and
rainhood which can be preset to admit outdoor air
for year-round ventilation.
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6. Thermostat:
To provide for two-stage heating and one stage
cooling in addition manual or automatic changeover
and indoor fan control.
7. Low Ambient Package:
Shall consist of a solid-state control and outdoor
coil temperature sensor for controlling outdoor
fan motor operation, which shall allow unit to op-
erate down to 0° F outdoor ambient temperature
in cooling.
8. Filter Rack Kit:
Shall provide filter mounting for downflow applica-
tions.
9. Square-To-Round Duct Transitions:
Shall have the ability to convert the supply and re-
turn openings from rectangular to round. (024-048
only)
10. Crankcase Heater:
Shall provide anti-floodback protection for low-
load cooling applications. (Standard on 042-060
sizes)
11. Electric heaters:
a. Electric heater shall be available as a field-
installed option.
b. Heater elements shall be open wire type, ade-
quately supported and insulated with ceramic
bushings.
c. Electric heater packages must provide single
point power connection capability.
12. Compressor Hard start kit:
Shall be available to give a boost to the compressor
motor at each start-up.