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IMPORTANT
The HCA Condensing Unit does not meet federal en-
ergy efficiency standards for new central air condition-
ing and is NOT to be used in new construction. EMI
has a D.O.E. waiver to sell the HCA as a replacement
unit only.
PRE-INSTALLATION
1. Unpack the unit and inspect for damage. Make any
freight claims immediately.
2. Inspect the planned locations of the evaporator and
condenser for proper fit as well as clearance for
access and service. If this is a replacement job, wall
openings may have to be modified for proper fit. Make
any necessary wall opening modifications and/or
provide fillers. Make certain the wall remains weather
tight.
3. Eliminate any outdoor obstructions that may cause
discharge air to recirculate to the intake. If this is not
possible, an alternate location must be found.
4. Plan the routing for piping and wiring, noting the
location of access holes for tubing and high voltage
wiring on the unit. Do not block service access to the
unit panels, control box, blower, etc.
5. Use a low voltage wall thermostat, assuming
evaporator unit is remote controlled and supplied by
Enviromaster International or a suitable equivalent. If
in doubt, contact the factory for assistance. Low
voltage access is in the bottom rear of the VCH and
the side panels of the HCA and HCH.
6. The wall thermostat should be located on an inside
wall where it will not be subject to drafts, sun exposure,
or heat from electrical fixtures or appliances. Follow
the manufacturer's instructions enclosed with the
thermostat for general installation procedures. Color-
coded insulated wires (#18 AWG) should be used to
connect the thermostat to the unit.
7. If using an EMI evaporator, make certain a 24V step-
down transformer must has been installed in the
evaporator section to supply control power between
the evaporator and the condenser. If ordering, specify
a 20va transformer. Avoid ordering larger transformers
as mounting space is limited.
NOTE: When matching an EMI AmericaSeries Vertical
or Horizontal In-Wall Condensing Unit to another
manufacturer's evaporator, the evaporator section must
be approved by Enviromaster International. Failure to
secure approval may void the warranty.
Enviromaster International LLC
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3
INSTALLATION
1. Install the outdoor louver to the chassis if it is not
already factory installed.
NOTE: Use of an outdoor louver other than one sup-
plied by Enviromaster International must receive prior
approval or the warranty may be voided.
2. Set the EMI AmericaSeries Vertical or Horizontal In-
Wall Condensing Unit in the wall opening. Provide a
minimum 1/4" pitch to the outside. Secure the unit to
the wall using lag bolts or other suitable fasteners.
Caulk weather tight.
3. Wiring electrical connections: All wiring must be done
in accordance with the National Electrical Code (NEC),
ANSI/NFPA No. 70 (latest edition); or local codes,
where they prevail. Any alteration of internal wiring
will void certification and warranty.
Use wiring with a temperature limitation of 75°C
minimum. Run the 208 or 230 Volt, 60 hertz electric
power supply through a fused disconnect switch to
the control box of the unit and connect as shown in
wiring diagram located on the inside of the control
access panel.
The unit must be electrically grounded in accordance
with local codes or, in the absence of local codes,
with the National Electrical Code ANSI/NFPA No. 70
(latest edition) or CSA C22.2 Part 1 (latest edition).
Power supply to the unit must be NEC Class 1 and
must comply with all applicable code. A fused
disconnect switch should be field provided for the unit.
The switch must be separate from all other circuits. If
any of the wire supplied with the unit must be replaced,
replacement wire must have an equivalent rating.
Electrical wiring must be sized to minimum circuit
ampacity marked on the unit. Use copper conductors
only. Each unit must be wired with a separate branch
circuit and properly fused.
4. Run interconnecting refrigerant lines (not to exceed
100' with 35' of vertical lift included) according to chart
data for specific unit. Use clean refrigeration tubing
only, and guard against kinking the tubes. Protect the
tubes from transmitting noise to walls, cabinets, etc.
Insulate the suction line. Connections are made at
the unit service valves. When making sweat
connections, use high temperature brazing alloys only
and protect the valves from overheating. If using flux,
protect the unit from contamination.
emi@enviromaster.com
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