AERCO BMK 6000 - Manual (Page 27)

Benchmark 6000 Boiler Installation, Operation & Maintenance Manual
CHAPTER 2 – INSTALLATION
OMM-0086_0D AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 27 of 210
GF-133
Ph.: 800-526-0288
03/20/14
2.9.1 Electrical Power Requirements
The Benchmark Boiler is available in two voltage configurations: either 208 VAC, three-phase, 60
Hz @ 30A or 460 VAC, three-phase, 60 Hz @ 15A. The Power Box contains terminal blocks as
shown in Figure 2-10. In addition, a label showing the required AC power connections is
provided on the front cover of the Power Box, as shown in Figure 2-11.
Figure 2-11: Power Box Cover Labels – 208VAC (Left) and 460VAC (Right)
Each unit must be connected to a dedicated electrical circuit. NO OTHER DEVICES SHOULD
BE ON THE SAME ELECTRICAL CIRCUIT AS THE BOILER.
A double-pole switch must be installed on the electrical supply line in an easily accessible
location to quickly and safely disconnect electrical service. DO NOT attach the switch to sheet
metal enclosures of the unit.
After placing the unit in service, the ignition safety shutoff device must be tested. If an external
electrical power source is used, the installed boiler must be electrically bonded to ground in
accordance with the requirements of the authority having jurisdiction. In the absence of such
requirements, the installation shall conform to National Electrical Code (NEC), ANSI/NFPA 70
and/or the Canadian Electrical Code (CEC) Part I, CSA C22.1 Electrical Code.
For electrical power wiring diagrams, see the AERCO Benchmark Electrical Power Guide, (GF-
2060).
2.10 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 Control system 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 the
removable front panel assembly of the unit. The I/O board is located in the I/O Box. The I/O
board terminal strip connections are shown in Figure 2-13. 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 board.
Refer to the wiring diagram provided below the I/O Box (Figure 2-13) when making all wiring
connections.