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6
3-SPEED INDOOR FAN MOTOR
FOR SELECTABLE HIGH AND LOW SPEEDS
Since the SPVU discharge air may be routed through
duct work for air distribution into the room and into
other rooms, the units are equipped with a 3-speed fan
that provides greater air movement to compensate for the
additional duct length. GE Appliances recommends an
HVAC engineer be consulted to determine the best fan
speed for the application.
A switch on the unit (dip switch #5-duct) adjusts the
two-speed fan system to different settings. With the
switch in the UP position, the system will operate using
high and medium fan speeds. With the switch in the
DOWN position, the system will operate using the
medium and low fan speeds.
For example, on the 9,000 BTUh unit, the three fan speeds
at 0.2" ESP provide 220 CFM on the lowest fan speed, 370
CFM on the medium fan speed, and 480 CFM on the
highest fan speed.
With the switch DOWN, the unit would provide 220 CFM
on LOW speed and 370 CFM on HIGH speed. With the
switch U P, the unit would provide 370 CFM on LOW
speed and 480 CFM on HIGH speed.
Higher CFMs tend to increase the operating sound level,
both from fan noise and from the air noise in the duct.
Higher CFMs also reduce the dehumidification rate of the
unit, while lower CFMs provide quieter operation and better
dehumidification. However, if the CFMs are not high enough
to adequately move the air through the duct system, the unit
will not be able to provide a comfortable room.
CORROSION PROTECTION
TREATMENT - STANDARD
All
SPVUs
are protected against
damage from seacoast area corrosion.
Components that are in contact with
the salt air have special coatings or
are made of non-corroding materials
to help withstand the corrosive effects
of the environment. This protection
includes the use of totally enclosed fan motors with painted
casings, a special coating on the outdoor coil, use of stainless
steel screws and brackets, and additional paint on components
such as the base pan.
SLINGER RING CONDENSATE REMOVAL
Condensate water removed from the indoor air is dispersed
into the air stream by the outdoor fan slinger ring and
deposited on the hot outdoor coil. The water helps cool the
refrigerant in the outdoor coil and increases the efficiency
of the air conditioner.
INDOOR COIL FROST CONTROL
Under certain operating conditions, frost can form on the
indoor coil of an air conditioner, reducing air flow and
cooling. In order to prevent frost from forming, the SPVU
has an automatic frost control on the indoor coil. When frost
begins to form on the coil, the compressor stops until the coil
temperature increases and the frost dissipates.
At this time, the compressor resumes operation and cooling
continues. The indoor fan remains running during the time
the compressor is off to help warm the coil with room
temperature air.
AUTOMATIC COMPRESSOR RANDOM RESTART
In the event of a power interruption, all compressors
attempting to restart immediately when power is restored
can result in a power surge that can cause another power
failure. The microprocessor in the SPVU has a random
restart logic system that prevents all compressors from
restarting at the same instant.
COMPRESSOR RESTART DELAY
SPVUs are designed to provide a minimum of three minutes
of compressor off time to allow refrigerant pressures to
equalize before attempting to restart. Attempting to
restart against a high head pressureshortens compressor
and overload protector life.
The units are also designed to provide a minimum of three
minutes of compressor run time to prevent short cycling
from disturbing the room occupant.
QUICK HEAT RECOVERY - ON HEAT PUMP UNITS
Heat pumps save money compared to electric resistance
heat, but if the unit cannot provide room occupant comfort,
the savings may be of questionable benefit. GE Appliances
has years of experience with designing Zoneline
®
heat
pumps to solve the problem of guest complaints.
The heat pump unit incorporates a two-stage heat/one-stage
cooling thermostat that utilizes the resistance heat to bring
the room temperature to the thermostat set point before
initiating heat pump operation. This method addresses the
two major complaints about heat pump operation: taking
too long to warm the room and low discharge air temperature.
Full electric resistance heat is utilized when the unit is first
turned on or when the unit is operating in heat pump mode
and the temperature in the room falls more than 4
°
F. b elow
the thermostat set point.
FEATURES & BENEFITS
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