CHAPTER 2: INSTALLATION
Page
18
of
158
PR2: 04/22/13
Benchmark 2.0LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
OMM-0052_0E
GF-127
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
•
Ph: 800-526-0288
compliance or for insurance purposes. The IRI gas train is factory pre-piped and wired. See
Appendix F, Drawing AP-A-843 for details.
2.8 AC ELECTRICAL POWER WIRING
The AERCO Benchmark 2.0LN Electrical Power Wiring Guide, GF-2060LN, must be consulted
prior to connecting any AC power wiring to the unit. External AC power connections are made
to the unit inside the Power Box on the front panel of the unit. Remove the front door of the unit
to access the Power Box mounted directly above the Control Box. Loosen the four Power Box
cover screws and remove cover to access the AC terminal connections inside the Power Box
(Figure 2-7).
NOTE
All electrical conduit and hardware must be installed so that it
does not interfere with the removal of any unit covers, inhibit
service/maintenance, or prevent access between the unit and
walls or another unit.
UPPER RIGHT CORNER OF FRONT PANEL
TERMINAL BLOCK
Figure 2-7: AC Input Terminal Block Location
Electrical Power Requirements
2.8.1
The AERCO Benchmark 2.0LN Boiler accepts 120 VAC, single-phase, 60 Hz @ 20A. The
Power Box contains a terminal block as shown in Figure 2-8. In addition, a wiring diagram
showing the required AC power connections is provided on the front cover of the Power Box.
Each Boiler 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 boiler 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 2.0LN Electrical Power Wiring
Guide, (GF-2060LN).
