OPTION 6 Step 3 – DAISY CHAIN WIRING BETWEEN BOILERS
1. Connect the boilers in a daisy chain, as shown below.
NOTES:
• Polarity must be observed for the RS485 connections.
• Connect the shield to any SHLD terminal on the I/O Board.
• When mounting the Outdoor Temp Sensor, it must be located on the North side of the
building where an average outside air temperature is expected. The sensor must be
shielded from direct sunlight as well as impingement by the elements. The outdoor
sensor may be wired up to 200 feet (61m) from the boiler.
• There is no polarity to be observed. The ground for the shield is at the power supply
ground. The sensor end of the shield must be left free and ungrounded.
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