6
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. Elevate the unit approximately 3” above the floor to ensure proper condenser airflow. Do not block
condenser air inlet on bottom of unit.
4. Heat up the sensor bulb in the evaporator compartment to 90°F using a low temperature heat gun, or
adjust the thermostat to 55°F. to simulate the need for cooling.
5. Turn the electrical power on.
6. Verify that the evaporator blower fan is running.
7. The compressor should start. Units equipped with a Short Cycle Protector, will have a delayed start of
3 minutes from the time power is applied to the unit.
8. Verify that the condenser blower or fan is running.
Note:
the start of the condenser fan or blower will
be delayed until the system pressures rise.
9. 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.
10. Turn off the electrical power and disconnect the air conditioner from the power source.
11. If the thermostat was lowered, adjust the thermostat back to 70°F. Failure to do this will cause the coil
to freeze.
12. If any cover plug is removed to adjust the unit, be certain 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.
A high head pressure switch is standard on this unit and prevents the evaporator coil from freezing under low
ambient temperature. The crankcase compressor heater allows the unit to start with an ambient temperature
of 0
o
F. In applications having frequent voluntary heat load fluctuations, an optional Compressor Short Cycle
Protector is recommended.
The temperature of the returning air to the air conditioner is displayed on the exterior
panel of the unit. This is considered the maximum temperature within the enclosure
and not the temperature of the air supplied to the enclosure.
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.
When the Kooltronic Air Conditioner is properly sized it should operate constantly and maintain 75
o
F to 115
o
F
enclosure temperatures, depending on the ambient temperatures.
IMPORTANT NOTE
To access the thermostat remove grille and upper panel. The thermostat is located in the
upper corner of the unit. All panels need to be re-installed to continue testing.
