SECTION 2: INSTALLATION
•
•
•
⚠
DO NOT make connections to terminals labeled
“NOT USED”. Attempting to do so may damage equipment.
Figure 2-12: Terminal Block Terminal Strips
2.10.1 I/O Board Connections
The I/O board contains the terminal listed below, arranged on removable, named connector strips J3
through J7 and J14, plus Molex connectors for unit harnesses. The maximum gauge of wires connecting
to the I/O board is 14.
NOTE:
To facilitate connections, these strips can be lifted off the I/O board. The entire strip is then remounted
on the I/O board after all connections have been made. If a connector strip is removed, it must be re-mounted
in its original orientation (connecting wires arranged around the
outside
perimeter of the I/O board).
Connector Strip J3 Terminals
Pin # Name
Description
1
2
Outside Temp +
Outside Temp -
Connections to Outside Air Temperature (OAT) sensor (P/N
61048
). Used on
Manager and Backup Manager units. Required for the
OUTDOOR RESET
mode of
operation. To enable this mode,
go to the Controller’s
Main Menu
→
Advanced
Setup
→
Unit
→
Application Configuration
and set
SH Operating Mode
to
Outdoor Reset
, then configure the related parameters.
3
Shield
Connection to the shield from any cable.
4
5
Supply
Supply Header
–
Connection to the Supply Header temperature sensor (2 wire sensor P/N
24410
,
or
4 wire sensor
P/N
61058
) for:
•
Main Loop (in a Variable-Primary application)
•
Secondary Loop (in a Primary-Secondary application)
•
Loop 1 (in a Multi-application)
Typically, used on Manager and Backup Manager units.
For more information, refer to the
CFR Boiler Application Guide
(TAG-0107)
6
Remote Analog In +
Connection to the Analog Remote Signal, if Operating Mode = Remote Setpoint.
Used on Manager and Backup Manager units.
7
Remote Analog In
–
SPARK MONITOR
FROM SHELL
HARNESS 63394-2
CONNECTOR J9
I/O BOARD POWER
HARNESS 63232
CONNECTOR J24
VALVE HARNESS
INTERLOCK FROM SHELL
HARNESS 63394-2
J6 PINS 3 & 4
40 PIN RIBBON I/O
HARNESS 63220
CONNECTOR J1
30 PIN RIBBON I/O HARNESS 63221
CONNECTOR J2
Summary of Contents for AERCO CFR 3000
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