Watts AERCO EXT Installation, Operation & Maintenance Manual page 46

Ufly Controller and BCM for Modulex EXT
CHAPTER 6: BOILER COMMUNICATIONS MODULE (BCM)
Figure 6-7: Boiler Control Manager Screen
To operate the BCM as a backup controller, press the MANUAL button on the BCM controller.
The BCM can also be operated as a backup controller automatically in lieu of pressing the
MANUAL button. This is particularly useful if the normal mode of operation is via Modbus so that
if the Modbus signal is lost, the BCM will automatically act as a backup controller. To accomplish
this, a jumper must be installed on terminals TA and 9 terminal block Y2 in the Input/Output box
and Parameter 376 must be set to 3.
The function of terminals Y2 TA/9 is configured as follows:
1. Access Device Management from Main Menu; select hcm > Parameter Settings
OMM-0159_A_A • 6/28/2022 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
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