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E. Coils
Condenser and evaporator coils to be constructed of
high-efficiency, aluminum fins and seamless axial-
grooved copper tubing, necessary to achieve EER
and COP rating, as specified on the chassis name
plate. Coils will be hydrophyllic-coated for greater
moisture dispersion.
F. Factory-Installed Electric Heater
The factory-installed, open-coil type, electric heater
is standard in heat/cool and heat pump chassis. The
electric heater shall contain both an automatic reset
and a one-time (non-resettable) over temperature
protection device.
G. The electric heating capacity shall be as identified on
the contract drawing schedule and in the specifica-
tion. Electric Heater is a dual-stage design, which
means it has two levels of heat output: high for cold
winter days and low for milder days. Since the low
setting is adequate to meet household heating de-
mands 80% of the time, a dual-stage heater runs for
longer periods and provides more even heat distribu-
tion.
H. Fresh Air Vent (Optional, not available on EZVR
units)
The chassis shall have a motorized open/close fresh
air vent with a concealed electric switch control. The
vent control shall allow a maximum of 75 CFM of
fresh air to be drawn into the room when the indoor
fan is operating (high speed) and the vent is open.
I. Condensate Removal System
The chassis shall have a condensate removal system
consisting of a condensate suction port, to draw and
atomize condensate, and a slinger ring integrated in
the outdoor fan, to disperse condensate onto the con-
denser coil to be evaporated during the cooling cycle.
Condensation accumulated during the reverse cycle
heating must NOT be evaporated against the indoor
coil so as to prevent contamination of the indoor air
with pollutants and odors. Condensation must be
disposed of using a (external)(internal) drain system
as shown on plans.
2.01 EQUIPMENT
A. General
Factory-assembled, single-piece heating and/or
cooling unit. Contained within the unit enclosure
shall be compressor, coils, fans and fan motor, heat-
ing means, controls, all wiring and piping, and a full
refrigerant charge (R410A).
B. Chassis
The chassis shall be a factory-assembled, single piece
heating and/or cooling unit, that is simple to install
and operate. Just slide the chassis onto the base pan,
install Discharge Plenum and ducting, and apply
power.
1. Operating Characteristics
Chassis shall be capable of starting and running at
115 °F ambient outdoor temperature per maximum
load criteria of AHRI Standard 390.
2. Electrical
Chassis shall be equipped with a power cord or
hard-wire ready. The chassis current draw shall be
specified on the chassis nameplate and match electri-
cal requirements specified on the Contract drawing
schedule and specifications. The power cord plug
configuration shall conform to NEMA standards
and the rating shall support the current draw of the
electric resistance heater.
C. Airflow System
The airflow system shall consist of a permanently-
lubricated, two-speed DC fan motors for the indoor
(EVAP.) and outdoor (COND.) fans. The outdoor
fan shall be light-weight, non-corrosive, anti-micro-
bial polymer plastic that is dynamically balanced for
quiet operation, with a multi-blade axial flow design,
and an integrated slinger ring. The indoor fan shall
be dynamically balanced, sheet metal, forward-
curved blower wheel, to assure uniform air distribu-
tion. The fan motor shall be an enclosed design to
reduce the effects of moisture and corrosion.
D. Compressor and Refrigerant
The rotary-type compressor shall be fully hermetic
with internal and external vibration isolation. The
refrigeration system will be sealed and contain a full
refrigerant charge (R410A).
Performance Specifications (Cont.)
