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Benchmark 5000-6000 Boiler Installation & Startup Manual
SECTION 2: INSTALLATION
2.11 FIELD CONTROL WIRING
Each unit is fully wired from the factory with an internal operating control system. No field control
wiring is required for normal operation. However, the C-More Controller used with all
Benchmark units does allow for some additional control and monitoring features. Wiring
connections for these features are made on the Input/Output (I/O) board located behind unit's
removable front panel. The I/O board is located in the I/O Box. The I/O board terminal strip
connections are shown in Figure 2-14. All field wiring is installed from the rear of the panel by
routing the wires through one of the four bushings provided on the sides of the I/O box.
Figure 2-13a: Input/Output (I/O) Box Location
I/O PCB
BOARD
Figure 2-13b: Input/Output (I/O) Box – Cover Removed
WARNING!
DO NOT make any connections to the I/O Box terminals labeled "NOT USED". Attempting to
do so may cause equipment damage.
OMM-0123_E • GF-207 • 12/17/2019
TERMINAL STRIPS
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
Page 26 of 95
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