Event electronic K_NA4C3P21R - Manual (Page 6)

The heater kit consists of a heater, a heat control thermostat and a heater limiter. The heater control
thermostat is a bimetal disk with a fixed set point of 60°F. When the entering evaporator air temperature rises
above 60°F the heater shuts off, and when the evaporator air temperature falls below 40°F the heater will
engage. The contact points of the alarm thermostat are normally closed. If the entering evaporator air
temperature exceeds 120°F the alarm thermostat contacts open, and when the temperature drops below
120°F the contacts close.
A condenser fan speed controller is standard on this unit. The speed controller temperature sensor is
installed in the airstream of the condenser. When the ambient temperature is above 95°F the condenser fan
will run at full speed. When the ambient temperature is between 85°F and 95°F the condenser fan will run
between maximum and minimum speed. When the ambient temperature is lower than 85°F the condenser
fan will cycle. In applications having frequent voluntary or involuntary power interruptions or heat load
fluctuations, a Compressor Short Cycle Protector is recommended to allow adequate time for the internal
pressure of the air conditioner to equalize before restarting.
When the Kooltronic Air Conditioner is properly sized it should operate constantly and maintain 75°F to
115°F enclosure temperature, depending on the ambient temperatures.
VI. Pre-Installation Testing
Before mounting the air conditioner to the enclosure, test for proper operation. This will verify the shipping
integrity of the system. Please follow the steps below prior to installation.
CAUTION
1 . The unit must sit in an upright position at a minimum room temperature of 65°F to allow the system
to warm-up. This is particularly important during winter months.
2. Refer to the identification label for proper electrical voltage and current requirements. Connect the
power cord to a properly grounded and fused electrical supply, leaving electrical power to the unit
turned off.
3. Note the factory thermostat setting which is 75 o F.
4. Turn the electrical power on.
5. Verify that the evaporator blower or fan is running.
6. Verify that the condenser blower or fan is running.
7. Operate the air conditioner for approximately ten (10) minutes. During this period no unusual noise
or vibration should be evident. Both the evaporator and condenser fans or blowers should be
delivering air through their respective discharge ports. The cool air discharged should be less than
70°F when the room temperature is between 70°F and 80°F.
8. Turn off the electrical power and disconnect the air conditioner from the power source.
9. If any cover plug was removed to adjust the unit, be sure to replace it in order to maintain the integrity
of the closed-loop airflow system.
NOTE: Before shipment all Kooltronic Air Conditioners are subjected to a performance test.
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The air conditioner must be standing in its proper mounting position for a minimum of five
(5) minutes prior to testing. Failure to follow this procedure will cause permanent damage to
the compressor. To avoid compressor damage do not tip the unit more than 45° from its
proper mounting position.