ECOSAIRE EN Series, Owner'S Manual

Page: 5 / 142

Ecosaire
®
July 2009 5
DESCRIPTION
Owners Manual Ecosaire
®
EN Series Precision Air Conditioner
Data subject to change without notice.
Product Description
EN Series Standard Features
The cabinet and frame are construct-
ed of heavy-gauge, Penta-Post
design, bolted construction using
wiped coat galvanized steel.
All interior air surfaces as well as
access panels are lined with 1-inch,
1.5 pound density, black mat-coated-
fiberglass, this provides double-skin
construction for reduced noise levels
and eliminates exposed insulation,
reducing the risk of inhaling fiber dust.
Access panels are mounted on lift-off
hinges and may be easily removed
when necessary. For sites with
restricted clearance through elevators
or doors, the unit may be factory- or
field- separated into the mechanical
section and coil and blower section. If
further clearance is necessary, the
door hinges may be easily removed.
All units are provided with top corner
lifting lugs for easy rigging. For instal-
lations with restricted clearance
through elevators, doors, etc., the unit
may be factory or field separated into
upper and lower sections. If further
clearance is required, even the filter
frame and door hinges may be
removed easily.
The extra-large surface area of the
evaporator coil allows Ecosaire ® to
provide high sensible cooling with low
air velocity and smooth air flow. Each
side of the evaporator coil is com-
pletely independent of the other.
Each is fitted with a corrosion-free
stainless-steel condensate pan. The
coil is constructed of copper tubes
expanded into aluminum fins.
Deep-pleated filters rated at 30%
efficiency by the ASHRAE 52-76
method are standard on all
Ecosaire ®
units. They may be easily replaced
from the top, left, or right sides of the
unit.
Dual Refrigeration circuits are fit-
ted with filter/driers, sight
glasses/moisture indicators, liquid-line
solenoid valves, adjustable
externally-equalized thermal-
expansion valves, manual-reset
high-pressure switches, low-pressure
switches, quick-connect refrigeration
service valves, and high-efficiency
heat-pump-duty hermetic compres-
sors. Water-cooled, glycol-cooled,
and FreeCool units have stainless-
steel plate condensers. Other than
the evaporator, all refrigeration
components are located out of the
air stream.
System reliability is enhanced with
multiple, direct-driven independent fan
assemblies, which maintain 66% to
50% of the airflow in the event of a
fan failure. The direct-drive feature
eliminates the need for belt and
pulleys and offers reduced drive
losses, also negating the need for
time-consuming drive maintenance.
Multiple fan assemblies also permit
automatic airflow adjustment with
varying static pressures, and allow for
increased dehumidification capacity.
All fans are arranged for draw-through
airflow and include motors with per-
manently lubricated ball bearings and
inherent overload protection. As a
standard feature one fan on the unit
has the capability of speed control,
employing either a EC Motor or a VFD
drive, allowing for variances and field
adjustment of the air flow, resulting
from changes in external static pres-
sures.
An EC (Electronically Commuted)
motor or a VFD drive can optionally
be provided for speed control. Fan
speed control is achieved by a 0-10 v
DC input signal, provided by transduc-
ers with various inputs, providing
higherefficiency if part load operation
is required.
Ecosaire® standard dual-circuited
condensers feature both horizontal
and vertical airflow, along with
ambient temperature ratings up to
105°F. Air side control is accom-
plished by cycling fans or pair of fans
in response to outdoor-air ambient
temperature. Air temperature sensors
are located in the air flow.
In order to reduce stress on
condenser coil, one fan or one pair of
fans must operate constantly when a
compressor(s) is operating. All
Ecosaire® air-cooled condensers fea-
ture Friction-Free Coil Tracks® (All
tube sheets are provided with over-
sized holes and tubes are supported
in sliding cushions for friction-free
assembly and maximum reliability).
All components require electric power in the following ranges under all conditions, including compressor inrush:
Rated Voltage
Voltage (V) Range (V)
208 192 - 220
230 207 - 253
460 414 - 506
575 518 - 633
E cosaire
® units are built to relevant standards and comply with all relevant listing agency requirements. Units must be
installed in accordance with all applicable codes. If components must be added to meet local codes, please contact the
factory in advance for engineering approval and warranty considerations. Any additional components are by others.