Watts AERCO CFR 3000, Installation And Start-Up Manual, Page: 13 / 25

SECTION 2: INSTALLATION
• • •
2.8.3 Massachusetts Installations
For Massachusetts installations, a mandatory external gas supply regulator must be positioned
as shown above. The gas supply regulator must be properly vented to the outdoors. Consult the
local gas utility for detailed requirements concerning venting of the supply gas regulator.
2.8.4 Manual Gas Shutoff Valve
A manual shut-off valve must be installed in the gas line upstream of the boiler as shown above.
2.9 AC Electrical Power Wiring
All electrical power requirements are listed in AERCO
’s
CFR Electrical Power Design Guide , TAG-0108. This
guide must be consulted prior to connecting any AC power wiring to the unit.
2.9.1 Electrical Power Requirements
CFR boilers are available with the following power options:
Model Voltage Phase Amperage
CFR-03000
208 V
3

/ 60 Hz
20
480 V 3

/ 60 Hz 15
2.9.2 Power Panel Locations
External AC power connections are made to the unit inside the Power Box on the front of the unit. Remove
the front panel to access the Power Box, which is mounted in the upper part of the unit.
Figure 2-9: Power Box with Closed Cover
Each unit must be connected to a dedicated electrical circuit. No other devices should be on the same
electrical circuit as the boiler.
A switch must be installed on the electrical supply line, external to the unit, in an easily accessible location
to quickly 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 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 the National Electrical Code (NEC) and ANSI/NFPA 70.
For electrical power wiring diagrams, see the CFR Electrical Power Design Guide, TAG-0108 .
POWER BOX
FRONT COVER