507390-01
Page 3 of 5
Issue 1733
Installing without a Wall Sleeve
Provide an opening in an outside wall with minimum
dimensions 28” side and 43-1/4” high (see Figure 1). Local
ordinances may require a steel lintel to support the wall
above the opening. This opening must be square in all
corners.
Provide support under the unit, inside the building. Make
sure that the inside support does not block the return air.
The unit should be installed level or pitched slightly to the
outside of the building so that rain water will drain from the
unit.
The use of resilient cork or rubber material between the
unit and the supports is recommended to minimize any
transmission of noise or vibration.
Seal the space between the unit and the building opening
using a non-hardening caulking compound. The seal must
be weather-tight to prevent entrance of moisture and water
into the building. Make sure that the drain holes in the base
are not plugged with caulking.
Installing with a Wall Sleeve
Install the wall sleeve in accordance with instructions
furnished with the sleeve.
Make sure that the gaskets attached to the sleeve are not
damaged.
Seal the space between the wall sleeve and the building
opening using non-hardening caulking compound. This
seal must be watertight.
Assure that the unit is completely seated against the
gaskets on the wall sleeve.
Slide the unit into the sleeve. When properly nested, the
angle on top of the unit should line up with the top flange of
the sleeve and should almost touch. Fasten the unit to the
sleeve with five screws furnished with the sleeve.
The sleeve is not intended as the sole support for the
unit. An additional support must be provided near the
return opening on the unit for adequate support. The
use of vibration isolation material between the unit and
the support is recommended.
CAUTION
Condensate Drain
To install the condensate line, connect one end of the
plastic tube over the 5/8” O.D. fitting in the center of the
condensate pan. Connect the other end to the drain tube
running to the open trap (see Figure 2).
The drain line should pitch gradually downward at least 1”
per 10 feet of horizontal run to the open drain trap.
Be certain that the plastic drain tube has free drainage and
is not crimped or flattened at any bend.
Test drainage by pouring water into the drain pan under the
evaporator and see that it is removed rapidly through the
drain tubing.
The plastic drain connection is provided so that it may
be disconnected from the permanent drain tubing in
the building without unsoldering in the event it become
necessary to remove the refrigeration chassis assembly.
Figure 2. EWC Drain Installation
Drain Pan
Open Drain Trap
Return
Air Duct
To Open
Drain Trap
Alternative
Method
5/8
" I.D.
Plastic Tube
(Supplied)
Top of Drain Tube
Must be Below
Bottom of Drain Pan
Drain Tube - Pitch 1"
for every 10 ft.
(Field Supplied)
Electrical Connections
All supply wiring should be done in accordance with
the National Electric Code, or with local codes, where
they prevail. Any alternation of internal wiring will void
certification and warranty.
NOTE:
Units are factory wired for a 230-volt power supply.
If power supply is 208 volts, it will be necessary to change
a wire connection on unit transformer from 240V terminal
to 208V terminal as shown on the wiring diagram.
The rating plate indicates the operating voltage, phase,
ampacity, and maximum circuit protection. Minimum
operating voltage of the 208-230 volt model is 197 volts.
Units must never be installed where voltage exceeds 10%
of voltage indicated on the rating plate.
Failure of the compressor as a result of operation on
improper voltage voids the compressor replacement
warranty.
A separate electric line for each circuit should be run
through a separate fused disconnect, from the main house
panel to the supply terminal block located in the unit.
Thermostat
Install the thermostat according to directions furnished
with it. Select a location which will measure true air
temperature. Locate on an inside wall, away from drafts, in
a room having the greatest exposure.
Connect the wires to the terminal block on the unit following
the wiring diagram attached to the unit.
