AERCO C-More Controls Manual June 2010 - Manual (Page 130)

C-More Controller for Benchmark, Innovation & KC
USER MANUAL
Page 130 of 162 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 04/22/14
GF-112 Phone: 800-526-0288 OMM-0032_0E
9.6.5 Option 5 - Remote Setpoint with Direct Wired Header Sensor & 4-
20ma Setpoint Drive
NOTE: Both Header Sensor AND 4-20ma Direct Drive must be wired. See the ProtoNode User
Manual, OMM-0080, GF-129 for more information.
Step 1: Direct Wired Header Sensor Wiring
1. On the MASTER Unit, Connect the Header Temperature Sensor (AERCO PN 61040) to the
Feed Forward (FFWD) terminals on the P-1 Harness Via the terminal block labeled “Header
Temp sensor” in the I/O Box.
NOTES:
• The header sensor must be installed between 2 and 10 feet downstream of the LAST boiler
in the plant’s supply water header.
• Shielded pair 18 - 22 AWG cable is recommended for header sensor wiring.
• There is no polarity to be observed.
• The ground for the shield is at the “SHLD” terminal in the I/O the Box.
• The sensor end of the shield must be left free and ungrounded.
Step 2: Direct Wired 0-20ma or 4-20ma Wiring
1. Connect the 4-20ma or 0-20ma terminals from the Direct Drive source to the Ain+ and Ain-
terminals on the Master Unit’s I/O Box.
NOTE:
• Shielded pair 18 - 22 AWG cable is recommended for this connection. Polarity must be
observed.
• The ground for the shield is at the driver signal source.
Step 3: Configure ALL C-More Units
On ALL Boilers:
1. Go to the Configuration Menu and set the BST Menu item to Enabled.
2. Go to the BST Menu and set the BST Mode item to BST Slave (for now).
Temp Sensor PN 61040 Header Temp Sensor I/O Box
I/O Box