AERCO KC1000 Low NOx Boiler July 2011 - Manual (Page 16)

INSTALLATION
2-6
2.4.2 MANUAL GAS SHUTOFF VALVE
A 1-1/4” manual gas shut-off valve is furnished
with each unit. The valve should be positioned
as shown in Figure 2.7. The manual gas shut-of
valve must be installed upstream of the supply
regulator in a readily accessible location.
2.4.3 IRI GAS TRAIN KIT
The IRI gas train is an optional gas train
required in some areas by code or for insurance
purposes. The IRI gas train is factory pre-piped
and wired. (See Appendix F, Drawing No. SD-A-
660).
2.5 ELECTRICAL SUPPLY
The AERCO Gas Fired Equipment Electrical
Power Wiring Guide, (GF-1060), must be
consulted in addition to the following material
before wiring to the unit is started. AC power
connection to the unit are made at the Power
Box.This box is located on the front right side of
the unit as shown in Figure 2.8. Conduit should
be run from the knockouts in the side of the box
in such a manner that it does not interfere with
the removal of any sheet metal covers. A flexible
electrical connection may be utilized to allow the
covers to be easily removed.
POWER BOX
BLOWER
SSOV
ACTUATOR
FRAME
Figure 2.8
AC Power Box Location
NOTE:
All electrical conduit and hardware should
be installed so that it does not interfere with
the removal of any cover, inhibit service or
maintenance, or prevent access between
the unit and walls or another unit.
2.5.1 ELECTRICAL REQUIREMENTS
Electrical requirements for each unit are 120
VAC, Single Phase, 60 Hz, 20 Amps from a
dedicated electrical circuit. No other devices
should be on the same electrical circuit as the
KC1000 unit.
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.
The AC power wiring diagram is shown in Figure
2.9.
USE COPPER CONDUCTORS ONLY FOR FIELD WIRING
60 HZ
DISCONNECT POWER BEFORE SERVICING
DANGER: HIGH VOLTAGE
20 AMP
120 VAC,
NEUTRAL
GROUND
LINE
POWER BOX
AERCO INTERNATIONAL INC.
INPUT POWER
Figure 2.9
AC Power Wiring Diagram
2.6 MODE OF OPERATION and FIELD
CONTROL WIRING
The KC Boiler is available in several different
modes of operation. While each unit is factory
configured and wired for the mode specified on
the equipment order, some field wiring may be
required to complete the installation. This wiring
is typically routed to the Input/Output (I/O) Box
located on the left side of the unit beneath the