Benchmark 750/1000 Boiler
CHAPTER 10. BOILER SEQUENCING TECHNOLOGY
OMM-0082_0J
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
Page
133
of
192
GF-130
Ph.: 800-526-0288
05/21/2014
10.3.6 Option 6 - Remote Setpoint with DIRECT WIRED Header Sensor AND
MODBUS Setpoint Drive
NOTE
: Both Header Sensor AND the ProtoNode SSD Device must be wired. See the C-More
Controller User Manual, OMM-0032, GF-112 and 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: Remote Setpoint with Network
1.
Configure and Connect the SSD Device (ProtoNode) per the AERCO Manual (GF129).
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).
On Master only
:
3. Go to the
BST Setpoint
item and enter the Failsafe Setpoint.
4. Go to the
BST Setup Menu
item and set to
Enabled
.
5. Go to the
BST Setpoint Mode
item and select
Remote Setpoint
.
6. Go to the
Head Temp Source
item
and select
FFWD Temp
.
7. Go to the
BST Remote Signal
item and select
Network
.
When ALL C-More units have been configured
:
8. Go to the
BST Menu
of the desired
Master
unit
and set the
BST Mode
item to
BST
MASTER
.
Temp Sensor PN 61040
Header Temp Sensor I/O Box
