60
Controls Connections
The controls wiring should be provided in a separate conduit from any power wiring. It is
also recommended to use of shielded wire to avoid interference.
BAC offers the following options to control the iPilot
®
Control System on the Nexus
®
Modular Hybrid Cooler. Check the submittal package to determine how the unit was setup
and shipped:
Leaving Process Fluid Temperature Sensor (Standard)
• A leaving process fluid temperature sensor sends a signal to modulate fan(s) speed.
• The sensor should be installed on the common discharge from all modules.
Control Signal for Customer Input Control Method (Optional)
• The optional control signal should be wired to terminals per your submittal, using one
of the following signal types:
– The 0-10VDC signal commands the fans off at 0V and full speed at 10V.
– The 10-0VDC signal commands the fans off at 10V and full speed at 0V.
– The 4-20mA signal commands the fans off at 4mA and full speed at 20mA
BMS Communication (Optional)
• Communication through Modbus over RS485 or TCP/IP. For RS485 connection, BAC
recommends the use of twisted shielded paired wire with a ground.
• Communication through BACnet over MS/TP or IP.
• For additional details, see wiring in your submittal.
• BMS data points are listed in
Table 15
on
page 57
.