AERCO KC1000 Heater Mar 2011 - Manual (Page 14)

INSTALLATION
2-6
2.4.2 MANUAL GAS SHUTOFF VALVE
A 1-1/4” manual gas shutoff valve is furnished
with each unit and should be positioned as
shown in Figure 2.7. The valve must be installed
upstream of the gas 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 comes pre-
assembled and wired from the factory. See
Appendix E, Drawing SD-A-661.
The IRI gas train may be ordered pre-assembled
or as separate components. If either IRI gas
train option is ordered a complete instructional
package, detailing field installation will be
included. To obtain a copy of an IRI instructional
package prior to the equipment shipping, contact
your local representative or AERCO.
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.
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, 1 Phase, 60 Hz, 20 Amps from a
dedicated electrical circuit. No other devices
should be on the same electrical circuit as a
KC1000 unit. A means for disconnecting AC
power from the unit (such as a service switch)
must be installed near the unit for normal
operation and maintenance. All electrical
connections should be made in accordance with
the National Electrical Code and/or with any
applicable local codes.
The electrical wiring diagram is shown in Figure
2.9. 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.
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 FIELD CONTROL WIRING
Each unit is fully wired from the factory with an
internal operating control system. No field
control wiring is required for normal operation.
However, the KC1000 control system does allow
for some control and monitoring features.
Wiring for these features can be accomplished
in the I/O Box behind the left side panel (Figures
2.10 and 2.11). The I/O Box is common to both
KC1000 water heaters and boilers. While some
of the inputs and outputs are common to both
water heaters and boilers, some are not
applicable to both. These are noted in the
following paragraphs.