8
KOLDWAVE 3AK (AIRMASTER)
REFRIGERATION SYSTEM
COMPONENTS
COMPRESSOR
The scroll compressor employed in the Koldwave
Airmaster is the most efficient and durable on the
market. Its simple design makes a major contribution
to its outstanding efficiency, reliability, and quiet
performance. The Bristol Inertia compressor, the most
advanced compressor in the industry today is also
used in Koldwave Airmaster.
COILS
The condenser and evaporator have enhanced coil
surfaces employing rifled tubes and louvered fins for
maximum performance.
BLOWER MOTORS
The Koldwave Airmaster is equipped with a three-
speed PSC condenser motor and a four-speed PSC
evaporator motor for design efficient flexibility over a
wide range of air flows. Both motors are of a high
quality totally-enclosed design with sleeve bearings.
BLOWERS
The Koldwave Airmaster uses two blowers instead of
one to enable flexibility in duct design, lowest possible
sound level and serviceability ease on both the
condenser and evaporator.
EXPANSION DEVICE
The refrigeration system is controlled by capillary
tubes, maintaining precise control of the expansion
process over the unit’s wide (60°-115°F room ambient)
operating range.
SAFETY CONTROLS
COMPRESSOR OVERLOAD & THERMOSTAT
The scroll compressor is equipped with a current/
thermal internal overload and a discharge thermostat
to guarantee positive compressor protection. The
thermostat is located on top of the compressor shell. It
is designed to sense dangerous high-discharge
temperature levels and remove power from the
compressor until temperature levels are safe again.
The approximate thermostat cut-out/cut-in are
290/140°F.
HIGH PRESSURE CUT-OUT
The Koldwave Airmaster incorporates, within the
refrigeration system, a manual reset high pressure
switch for maximum protection of the compressor. The
cut-out pressure setting is 375 ±10 psig. In the event
that the high pressure switch setting is exceeded, the
compressor and condenser fan can be restarted by
depressing the “reset” button located in the lower front
section of the unit. The high pressure control’s capillary
line screws onto an access valve on the refrigeration
hot gas line to make it possible to remove or replace a
defective control without disturbing the refrigeration
system.
FREEZE CONTROL
The unit employs an automatic reset freeze control,
located in the electrical box, to turn the entire unit off at
low ambients and defrost the evaporator coil for
approximately five minutes.
CONDENSER FAN SPEED CONTROL
An automatic fan speed control encased in the
electrical box is used to change the condenser fan
speed from high to low at low ambients. A SPDT
toggle switch may be used instead of the automatic fan
speed control switch.
GENERAL AIRFLOW PATTERNS
Condenser intake air is drawn in through the upper and lower sections of
the unit’s left-hand side panel and passes through the condenser coil,
extracting heat from the refrigeration system. The hot air is discharged out
the exhaust air opening located on top of the unit. Evaporator air is taken
in through the middle, front slotted evaporator intake door and is cooled by
the evaporator coil. The cool air is then discharged out of the unit through
a plastic grille. Both condenser and evaporator inlets are provided with
filters.
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