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Multi-zone Heat Pump Condensing Units
MultI-zonE condEnSEr SEquEncE of oPErAtIon
Refer to the indoor unit for the proper low Volt interconnect wiring.
LOW VOLT INTERCONNECT DIAGRAMS
OPERATION AND MAINTENANCE
The EMI America Series outdoor section is
the compressor bearing unit of the system.
It operates at the command of the indoor
section or room thermostat. Therefore, the
operation will be described in the manual
pertaining to the indoor section.
EMI units are designed and constructed for
reliability and long life with minimal main-
tenance. You can assure peak operating
efciency by regularly inspecting for free air
passage into and through the coil. If debris
collect on the air coil, it should be cleaned by
"back-flushing" with a spray of water or vacu-
uming. TURN OFF POWER SUPPLY FIRST.
Outdoor units may be cleaned or waxed if
desired. Use a non-abrasive car wax.
Panels should remain on the unit at all times.
Service should be performed by a QUALI-
FIED service agency only.
GENERAL RECOMMENDATIONS
Do not charge the straight cool units on
cold days unless weighing in the charge.
The heat pump systems may be charged
in heat cycle between 35 and 75°F. These
units use a heat cycle TXV and cannot
be charged to superheat; use weight or
subcooling method only.
Charging should be done with a dial-a-
charge or weighed in with a scale.
SPECIFIC CHANGES
All EMI products are subject to ongoing de-
velopment programs so design and speci-
cations may change without notice. Please
consult the factory for more information.
NOTE: For more information, please visit
our web-site at www.enviromaster.com or
call 1-800-228-9364.
coil, melting off any ice build-up. At the
same time the unit will switch on the in-
door electric strip heater to temper the
cold air being discharged from the evapo-
rator unit. This will continue until either
the defrost-sensor opens (approx. 60° F)
or a 10-minute maximum cycle time has
elapsed. Defrost times will vary depend-
ing on outdoor temperature and moisture
conditions. When the defrost cycle is com-
plete the unit will return to normal heating
operation.
*Factory settings 9-24k Btu = 90
minutesW