AERCO BMK 1.5 LN Dual Fuel Feb 2013 - Manual (Page 18)

CHAPTER 2: INSTALLATION
Page 18 of 162 PR2: 05/09/12
Benchmark 1.5LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
OMM-0041_0C
GF-121
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
IRI Gas Train Kit 2.7.3
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-830 for details.
2.8 AC ELECTRICAL POWER WIRING
The AERCO Benchmark 1.5 Electrical Power Wiring Guide, GF-4060, 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 1.5 Boiler accepts 120 VAC, single-phase, 60 Hz @ 20 A. 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 Benchmark 1.5 Boiler must be connected to a dedicated electrical circuit. NO OTHER
DEVICES SHOULD BE ON THE SAME ELECTRICAL CIRCUIT AS THE BENCHMARK
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