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To avoid possible damage to the air conditioner, it must be in an upright (horizontal position)
for a minimum of five (5) minutes before start up.
Refer to nameplate for proper electrical frequency, current, and voltage requirements, then
connect to a properly grounded and fused electrical circuit. (see "Wiring Schematic" (page 9)
for location of power connection)
NOTE:
No other equipment should be connected to this circuit to prevent overloading.
Additional isolation may be required if the equipment nearby is susceptible to line noise or
voltage fluctuation.
• Make sure the unit has been upright for five (5) minutes.
• Operate the air conditioner for ten (10) minutes. No excessive noise or vibration should be
evident during this run period. The condenser fan, the evaporator or cool air fan, and the
compressor should be running. To check cool air output, use a reliable air temperature
measuring device. The cool air output should be between 50° to 60° F when room
temperature is between 70° to 80° F.
• These units are equipped with a thermostat. If the thermostat is not set properly the
condenser fan and compressor may not operate while the evaporator fan runs. If this
condition exists, the entering air temperature to the evaporator may be below the
thermostat setpoint. To correct, set the thermostat setting to a lower setpoint, until the
condenser fan and compressor start.
• The compressor is provided with automatic reset thermal overload switch. This switch is
located and mounted inside the plastic enclosure clipped to the compressor. This switch will
be activated whenever the compressor overheats. Excessive heat buildup may be caused
by:
1. Clogged or dirty inlet air filter.
2. Ambient air temperatures exceed nameplate rating.
3. Enclosure heat load exceeds the rated capacity of the air conditioner.
The thermal overload switch will actuate and stop compressor operation. Blowers will continue
to operate, however, and the compressor will restart when it has cooled to within the thermal
overload cut−in temperature setting.
87567377
POWER CONNECTION
CAUTION
STARTUP PROCEDURE
E 2005 Hoffman Enclosures Inc.
5
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