Watts AERCO EXT Installation, Operation & Maintenance Manual page 79

Ufly Controller and BCM for Modulex EXT
0 APPENDIX A: BCM PARAMETERS
PARAMETER DESCRIPTION
Programmable Relay #1 (BCM Y4-1/2)
Function
(BCM connector Y4, terminals 1 and 2)
368 0 = Primary Pump (boiler loop) control
1 = Boiler status contact (closes when at
least one burner is on, opens when all
the burners are off)
Programmable Relay#2 (Alarm Relay)
Function
(BCM connector Y4, terminals 3 and 4)
0 = Contact closes if a failure prevents
369
the insertion of the requested number of
burner(s)
1 = Contact closes with each failure of
the boiler
Water Pressure Sensor - NOT
771 APPLICABLE.
Note: Leave at default value of 0
Min Gas Pressure Sensor - NOT
768 APPLICABLE.
Note: Leave at default value of 0
Chimney Obstruction Sensor - NOT
793 APPLICABLE.
Note: Leave at default value of 2
Minimum Flow Sensor
Note: Leave at default of 1 - this will
register a global fault when the flow
sensor connected to BCM terminals Y2
FL/10 trips.
622
1 = Enabled Flow Sensor / Global Fault
3 = Enabled Flow Sensor / Local Fault
5 = Enabled Flow Sensor / Global Fault
and check Flow Switch fault
7 = Enabled Flow Sensor / Local Fault and
check Flow Switch fault
CH Manual Request - NOT APPLICABLE.
607
Note: Leave at default value of 0
OMM-0159_A • 6/28/2022 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
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