© 2015 Pentair Equipment Protection
89117329
- 6 -
TECHNICAL INFORMATION
SEQUENCE OF OPERATION
The air conditioner comes standard with an internally mounted thermostat. The front cover must be removed in
order to gain access to the thermostat which is located to the right of the LCD display as shown below.
COOLING
When the enclosure temperature is above the cooling thermostat setpoint, power is applied through the
thermostat and the compressor is then energized. The condenser fan will start immediately. Component
specific information is listed below.
Operating the air conditioner below the minimum ambient temperature or above the maximum ambient
temperatures indicated on the nameplate voids all warranties. DO NOT set the enclosure thermostat to a
temperature lower than 70 F. Doing so can increase the likelihood of frost buildup on the evaporator coil.
For optimal operation, and energy conservation, set the thermostat to the highest temperature that the
enclosure equipment is rated to.
The moisture that the enclosure air can contain is limited. If moisture flows from the drain tube
continuously this can only mean that ambient air is entering the enclosure. Be aware that frequent
opening of the enclosure’s door admits humid air that the air conditioner must then dehumidify.
STANDARD AND OPTIONAL COMPONENT OPERATION
THERMOSTAT
The thermostat setpoint equals the temperature that the air conditioner turns off. The thermostat has a
10 F differential from setpoint until it calls for cooling. An example of operation is shown below.
FOR COOLING (75-100 F RANGE):
•
Thermostat setpoint = 80 F
•
Cooling turns on at 90 F
•
Cooling turns off at 80 F
460 V TO 230 V TRANSFORMER (N170X46GXXX ONLY)
The 230 V from this transformer powers the compressor, fans and optional transformers.
230 V TO 10 V TRANSFORMER (OPTIONAL)
This transformer powers the temperature display only.
230 V TO 24 V TRANSFORMER AND RELAY (OPTIONAL)
The transformer and relay are used to operate the condenser blower and compressor by using a customer
supplied, remote mounted door switch. This is not a safety door switch, but rather, only helps to reduce
condensation at the evaporator coil if the door is opened. The unit will remain electrified when the door
switch is operated with the evaporator fan continuing to operate, and potentially, if temperatures are low
enough, the heater may continue to operate on outdoor models.