AERCO BMK 2.0 LN October 2012 - Manual (Page 22)

Chapter 2
Benchmark 2.0LN Low NOx Boiler
GF-123
Installation Installation, Operation and Maintenance Manual OMM-0046_0F
Page 22 of 172 AERCO International Inc.● 100 Oritani Dr. ● Blauvelt, NY 10913. ● Ph: 800-526-0288 PR1 10/17/12
2.7.4 IRI Gas Train Kit
The IRI gas train is an optional gas train configuration which is required in some areas for code
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
2.8.1 Electrical Power Requirements
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.