Watts AERCO KC Series, User Manual

Page: 12 / 82

INSTALLATION
7
Figure 2.8
AC Wiring 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
KC unit. A disconnecting means 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 removed easily.
Figure 2.9
Electrical 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 a particular mode,
some field wiring may be required to complete
the installation. This wiring is typically to the
Field Control Wiring Box located on the left side
of the unit beneath the removable side panel
(see Fig. 2.10). Field wiring for each particular
mode of operation is described in the following
sections.
Figure 2.10
Field Control Wiring Box Location
SSOV
ACTUATOR
BLOWER
FRAME
ELECTRICAL WIRING BOX
FIELD
CONTROL
GAS SHUT-OFF VALVE
BLOWER
BOX
WIRING
AERCO INTERNATIONAL INC.
15 7
INDICATION
-
+
FAULT
SHIELD
BMS
14
13
12
10
11
6
4
5
2
3
9 1
FIELD WIRING
START
16 8
-
+
4-20 mA
EXH.
TEMP.
SWITCH
AIR
SENSOR
OUTDOOR