22
• EMI Ductless Series condensers are designed to operate
with EMI Series air handlers.
• System can be confi gured for single
source or double source power.
Note - Single source power is for NON-Electric heat
systems only.
• See unit name plate for correct breaker type and size.
• Outdoor and indoor units are connected to each other
through low volt interconnect wiring. 24V transformer
located in indoor unit provides low volt power.
• Indoor set point temperature range is adjustable
between 55° and 90ºF (13 – 32ºC) in one degree
increments.
1.
Straight cool condensers are designed to operate as
single stage DX (Direct Expansion) cooling unit.
2.
Heat pump condensers are designed to operate as
single stage cooling and heating system.
3.
Two stage heating operation indoor unit must be
equipped with Heat Pump and optional electric heater.
4.
Proper system operation requires condenser to be
matched with appropriate indoor unit using either
standard hand held remote or optional wired wall
thermostat.
S1CV / S1HV Condenser Operation
Heat pump condensers utilize reversing valve to provide
reverse cycle (heating) operation.
Outdoor unit acts as either condenser or evaporator
providing cooling or heating to indoor space based on mode
of operation and ambient conditions.
Reversing valve is energized for Cooling Mode operation.
Should reversing valve fail to actuate, system will default to
Heating Mode of operation.
• When indoor control is placed in Cooling Mode, with
set point temperature below room temperature,
compressor, outdoor fan, and indoor blower energize.
• Anti-short cycle timer (ASCT) prevents compressor from
re-starting for three minutes.
• When indoor control is placed in Heating Mode, with
set point temperature above room temperature,
compressor, outdoor fan and indoor blower energize.
Anti-short cycle timer (ASCT) prevents compressor from
re-starting for three minutes.
• Heat pump defrost control is designed to keeping
outdoor coil free from frost and ice buildup. Through
control of reversing valve, compressor speed, outdoor
fan speed, and indoor optional electric heat. Defrost
is initiated when outdoor coil sensor has accumulated
90 minutes of compressor run time with coil operating
below 30ºF (-1.1ºC). When coil sensor reaches 60ºF
(15.5ºC), due to either defrost cycle or increase in
ambient temperature, timer is reset to zero (0) minutes.
S1CV / S1HV IOM’s Sequence of Operation
OPERATION AND MAINTENANCE
Initial Start Up
Low ambient cooling, with installed crankcase heater,
power system 24 hours before attempting to start unit in
cool weather (below 60°F).
Test Unit Data Sheet
After fi nal system check using Operation Charts. See pages
14-21.
Record results on Test Unit Data Sheet page 26.
Final Inspection Before Start Up
• Remove gauge set, install caps.
• Mount all access panels and verify they are properly
secured.
• Verify all schrader caps have O-rings.
• Make fi nal visual inspection and repair any defi ciencies.
Operation
S1CV / S1HV outdoor sections are compressor bearing
units of system.
Operation is at command of indoor section or room
thermostat. System operation is described in the indoor
section manuals.
WARNING
Electrical shock hazard. Turn OFF electrical power
supply before preforming the following maintenance
procedures. Have a qualifi ed service agency perform
system maintenance. Failure to do so could result in
death or serious injury.
!
Maintenance
• Have service performed by a qualifi ed service agency.
• Turn off all power to the unit.
• Regularly inspect for free air passage into and through
the coil.
• Clean air coil of debris by “back-fl ushing” with spray of
water or vacuuming.
• Outdoor units may be cleaned or waxed. Use non-
abrasive car wax on metal surfaces only.
• Unit is equipped with permanently lubricated motor.
Adding few drops of oil through oiling ports twice
yearly will extend life of motor. Do not over oil.
WARNING
Electrical shock hazard. Do not operate unit without
all panels in place and secured.
!
• Panels should remain on the unit at all times.
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