Specifications

Benchmark Series Boilers GF-2060
Electrical Power Guide
TAG-0048_0I
PRI 11/08/2013 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: [phone] Page 3 of 8
GENERAL
Benchmark (BMK) Gas Fired Boilers are fully factory wired packaged units which require simple external
power wiring as part of the installation (Diagram 1). This technical guide is intended to help designers
provide electrical power wiring (line voltage) to Benchmark units. Control wiring details are provided in other
publications, depending upon unit application. This document is intended only as a guide and therefore
cannot include all possible alternatives, or unit applications. In order to comply with all codes and authorities
having jurisdiction, designers and installers must plan the electrical wiring carefully and execute the
installation completely. Emergency shutoffs, fusible fire switches, break glass stations, and other electrical
requirements should be considered and installed whenever necessary.
Boiler Electrical Requirements
With the exception of BMK 2500, BMK 3000, and BMK 6000 models, Benchmark boilers require 120V/1
∅
/60
Hz electrical power. BMK 2500, BMK 3000, and BMK 6000 models require 3
∅
power and can be ordered
with either one of the following power options:
BMK 2500 - 3000 BMK 6000
208-230V/3
∅
/60 Hz @ 20 amps 208-230V/3
∅
/60 Hz @ 30 amps
460V/3
∅
/60 Hz @ 15 amps 460V/3
∅
/60 Hz @ 20 amps
For all Benchmark models, the power distribution block for field wiring connections (Diagram 2) is located in
the upper right corner behind the unit front panel. All copper wire must be connected to the power distribution
block. For all 1
∅
Benchmark models, the minimum supply voltage to the unit is 110 VAC. For 3
∅
Benchmark
2500 - 6000 models, the minimum supply voltages to the unit are 190 VAC for 208-230/3
∅
/60 Hz and 415
VAC for 460/3
∅
/60 Hz. Lower voltages will result in increased wear and premature failure of the blower
motor. Wire size and type should be made per the National Electrical Code based on length and load.
Diagram 1: Service Switch Typical Location
Service
Disconnect
Switch
Control
Panel