AERCO Modulex E8 Controls Guide - Manual (Page 4)

PR1: 11/30/12 Page 4 of 112
GF-115-C Modulex E8 Controller and BCM
Operations and Maintenance Manual
OMM-0084_0D
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526- 0288
5.2.4 Configuring Set Point High and Low Limits Per Outside Temperature Sensor . 44
5.3 0 to 10 Volt Remote Set Point Mode ............................................................. 47
5.3.1 Remote Signal Source Wiring Connections ........................................................ 47
5.3.2 Configuring Remote Signal Source..................................................................... 48
5.3.3 Setting the Voltage and Set Point Limits for U1/U2 and T1/T2 ......................... 49
5.3.4 Setting the Curve 11-UO Voltage ....................................................................... 50
5.3.5 Viewing the Set Point .......................................................................................... 51
5.4 Domestic Hot Water Operation Using A Tank Sensor ................................ 51
5.4.1 Sensor Wiring Connections ................................................................................. 51
5.4.2 Configuring the Controller for DHW With a Tank Sensor ................................. 52
5.4.3 Setting the DHW Set Point ................................................................................. 53
5.4.4 Displaying Temperatures Associated With DHW .............................................. 54
5.5 DHW Operation Using an Aquastat .............................................................. 55
5.5.1 Sensor Wiring Connections ................................................................................. 55
5.5.2 Configuring the Controller for DHW With an Aquastat ..................................... 55
5.5.3 Setting the DHW Set Point ................................................................................. 55
5.5.4 Displaying Temperatures Associated With DHW .............................................. 55
5.6 Boiler & Pump Enable/Disable ...................................................................... 55
6. CONNECTION DIAGRAMS .................................................................... 57
6.1 Power Terminal Assignments ....................................................................... 58
6.2 Sensor Terminal Assignments ...................................................................... 59
7. BOILER COMMUNICATIONS MODULE (BCM) ..................................... 61
7.1 Boiler Communications Module (BCM) Description ................................... 61
7.2 BCM Fault Relay ............................................................................................. 63
7.2.1 BCM Fault Relay Wiring .................................................................................... 63
7.2.2 Clearing Faults .................................................................................................... 63
7.3 BCM Configured as Back-Up Controller ...................................................... 64
7.3.1 BCM Back-Up Controller Wiring ....................................................................... 64
7.4 BCM Configured as Primary Controller Utilizing Modbus .......................... 65
7.4.1 Operating Scenario .............................................................................................. 65
7.4.2 Physical Modbus RS485 Wiring ......................................................................... 66
7.4.3 Disconnecting the E8 from the E-Bus on the BCM Board. ................................ 67
7.4.4 AERCO BMS II/ACS Master to BCM Slave Wiring Connections. ................... 68
7.4.5 EMS or BAS Master to BCM Slave Wiring Connections .................................. 68
7.5 RS485 Loop Termination Resistors and Bias .............................................. 68
7.5.1 Master AERCO BMS II/ACS or EMS/BAS Terminating Resistor and Bias ..... 68
7.5.2 BCM Controller Terminating Resistor and Bias ................................................. 69
7.6 Modbus Network Wiring Diagram ................................................................. 70
7.7 Modbus Software Set-Up ............................................................................... 73
7.7.1 BCM Set-Up for Modbus Operation ................................................................... 73