EVAPCO eco-Air Series, User Manual

Page: 4 / 39

4
Controller User Manual
The following safety issues need to be addressed by those responsible for the installation, maintenance, and repair of the EVAPCO
Controller:
• Access to the control panel (including the disconnect switch(es)).
• Sizing and protection of electrical circuits feeding the control panel(s) and branch circuits feeding the controlled equipment.
• Proper grounding of electrical circuits.
• Qualification of persons who will install, maintain, and service the electrical equipment.
Panel Installation Considerations
When the EVAPCO Controller does not ship factory mounted on the eco-Air unit, the EVAPCO Controller should be placed in close
proximity to the eco-Air unit to reduce the wire lengths required. If the EVAPCO Controller is within sight of or mounted on the eco-
Air unit, the EVAPCO Controller may be used as the main electrical disconnect for the eco-Air unit. Otherwise, separate electrical
disconnects may be required. Consult applicable electrical codes to make this determination. Avoid mounting the EVAPCO Controller
with a southern exposure. This will minimize the amount of solar heat gain the system will experience and will make it easier to view
the operator interface.
Temperature/Pressure Sensor Installation
EVAPCO eco-Air fluid coolers are supplied with a thermowell (1/2” NPT threads) and a RTD temperature sensor. The thermowell and
temperature sensor should be installed in the common return pipework of the eco-Air fluid cooler unit. Thermowells must be installed
in the horizontal sections of the coil piping. A small amount of thermal paste should be added to the thermowell before the RTD sensor
is inserted to ensure a more accurate fluid temperature measurement.
Figure 1
The suggested temperature sensor location for fluid coolers. Piping shown by dashed lines provided and installed by others.