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Side Discharge Condensers
19
OPERATION AND MAINTENANCE
The S1C/H and S2C outdoor sections
are the compressor bearing units of the
system. It operates at the command of
the indoor section or room thermostat.
Therefore, the system operation will be
described in the manual pertaining to the
indoor section.
EMI units are designed and con-
structed for reliability and long life with
minimal maintenance. You can assure
peak operating efficiency by regularly
inspecting for free air passage into and
through the coil. If debris collects on the air
coil, it should be cleaned by "back-ushing"
with a spray of water or vacuuming. TURN
OFF POWER SUPPLY FIRST. Outdoor
units may be cleaned or waxed if desired.
Use a non-abrasive car wax (on metal
surfaces only).
This unit is equipped with a perma-
nently lubricated motor. Although oiling is
not necessary, adding a few drops through
the oiling ports twice yearly will extend the
life of the motor. Do not over oil.
Panels should remain on the unit at all
times. Service should be performed by a
QUALIFIED service agency only.
SPECIFIC CHANGES
All EMI products are subject to on-
going development programs so design
and specications may change without
notice. Please consult the factory for more
information.
STARTING THE UNIT
• In low ambient cooling 9-12 Btuh units,
if a crankcase heater is installed,
power the system 24 hours before
attempting to start the unit in cool
weather (below 60° F).
• After doing a nal system check using
the Operation Charts (supplied on pre-
vious pages). Record results on Test
Unit Data Sheet on page 26.
PREPERATION FOR START-UP
• Remove gauge set. Mount all access
panels and make sure they are prop-
erly secured.
• Make nal visual inspection and repair
any deciencies.
NOTE: A hard start kit may be required
for units in low voltage applications.
SINGLE-ZONE AND DUAL-ZONE CONDENSER SEQUENCE OF OPERATION
EMI America Series condensers are
designed to operate with EMI America
Series evaporators. Both the condenser
(outdoor unit) and evaporator (indoor
unit) have a high volt service connection.
Each is to be independently connected to
the electrical service panel. (See the unit
name plate for the correct breaker type
and size). The outdoor and indoor units
are also connected to each other through
a low volt interconnect wiring. A 24V trans-
former located in the indoor unit provides
the low Volt power source.
Straight cool condensers are designed
to operate as a single stage cooling unit.
Heat pump condensers are designed to
operate as a single stage cooling two
stage heating unit. For proper operation
the unit must be matched with an appro-
priate EMI indoor unit with unit mounted
controls and/or wall mounted thermostat.
For two-stage heating operation the in-
door unit must be equipped with an elec-
tric strip heater.