AERCO Modulex E8 Controller (and BCM) For Modulex EXT Boilers - Manual (Page 4)

E8 Controller and BCM for Modulex EXT
Installation, Operation & Maintenance Manual
Page 4 of 108 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0093_0A
PRI: 06/24/2013 Phone: 800-526-0288 GF-136-C
6.4.2 Configuring the Controller for DHW With a Tank Sensor ........................................................... 68
6.4.3 Setting the DHW Set Point ......................................................................................................... 69
6.4.4 Displaying Temperatures Associated With DHW ....................................................................... 70
6.4.4.1 Viewing DHW Set Point and Actual DHW Temperature ..................................70
6.4.4.2 Viewing DHW Set Point With T-BOILER DHW Function .................................70
6.5 DHW Operation Using an Aquastat ................................................................................................... 71
6.5.1 Sensor Wiring Connections ........................................................................................................ 71
6.5.2 Configuring the Controller for DHW With an Aquastat ............................................................... 71
6.5.3 Setting the DHW Set Point ......................................................................................................... 71
6.5.4 Displaying Temperatures Associated With DHW ....................................................................... 71
6.6 Boiler & Pump Enable/Disable .......................................................................................................... 71
CHAPTER 7: E8 CONNECTOR TERMINAL ASSIGNMENTS .............................................................. 73
7.1 SENSOR Terminal Assignments ...................................................................................................... 73
7.1.1 Connector 7 ................................................................................................................................ 74
7.1.2 Connector 1 ................................................................................................................................ 74
7.1.3 Connector 5 ................................................................................................................................ 74
7.1.4 Connector 8 => PT 1000 Sensor ................................................................................................ 74
7.1.5 Connector 3 ................................................................................................................................ 74
7.1.6 Connector 9 ................................................................................................................................ 74
7.2 MAINS Power Terminal Assignments ............................................................................................... 75
7.2.1 Connector 2 ............................................................................................................................... 75
7.2.2 Connector 6 ............................................................................................................................... 75
7.2.3 Connector 4 ............................................................................................................................... 75
CHAPTER 8: BOILER COMMUNICATIONS MODULE (BCM) ............................................................. 77
8.1 BCM Description ................................................................................................................................ 77
8.2 BCM Fault Relay ............................................................................................................................... 79
8.2.1 BCM Fault Relay Wiring ............................................................................................................. 80
8.2.2 Clearing Faults ............................................................................................................................ 80
8.3 BCM Configured as Back-Up Controller ............................................................................................ 80
8.3.1 BCM Back-Up Controller Wiring ................................................................................................. 80
8.4 BCM Configured as Primary Controller Utilizing Modbus ................................................................. 82
8.4.1 Operating Scenario ..................................................................................................................... 82
8.4.2 Physical Modbus RS485 Wiring ................................................................................................. 83
8.4.3 Disconnecting the E8 from the E-Bus on the BCM Board .......................................................... 83
8.4.4 AERCO BMS II/ACS Master to BCM Slave Wiring Connections. .............................................. 84
8.4.5 EMS or BAS Master to BCM Slave Wiring Connections ............................................................ 84
8.5 BCM Control of VFD Primary Pump .................................................................................................. 84
8.5.1 Pump Control Wiring ................................................................................................................... 84
8.5.2 Pump Control Operation ............................................................................................................. 84
8.6 RS485 Loop Termination Resistors and Bias ................................................................................... 84
8.6.1 Master BMS II/ACS or EMS/BAS Terminating Resistor and Bias .............................................. 85
8.6.2 BCM Controller Terminating Resistor and Bias .......................................................................... 85
8.7 Modbus Network Wiring Diagram ...................................................................................................... 86
8.8 Modbus Software Set-Up .................................................................................................................. 88
8.8.1 BCM Set-Up For Modbus Operation .......................................................................................... 88
8.8.2 Monitoring and Configuration Only ............................................................................................. 88
8.8.3 AERCO BMS II/ACS Modbus Control and Monitoring ............................................................... 89
8.8.4 Modbus Remote Setpoint Control and Monitoring...................................................................... 89
8.8.5 EMS or BAS Set-Up As Master to BCM Controller Slaves......................................................... 89
8.9 Multiple Modulex Boiler Heating Mode – Using A BMS II or ACS .................................................... 89
8.9.1 Sequence of Operation (Example: Four-Modulex boiler installation) ......................................... 89
CHAPTER 9: BCM MODBUS AND ADDRESS ASSIGNMENTS.......................................................... 91
9.1 BCM Modbus Comm. & Support Requirements ............................................................................... 91
9.1.1 Function Codes ........................................................................................................................... 91
9.1.2 Modbus Support Requirements .................................................................................................. 91
9.2 BCM Controller Standard Holding Register Assignments ................................................................. 92