3.2 System Overview
The Energy Sentry 9212 Demand Controller System
consists of three general pieces: the Control/Display
(C/D) Unit, the Relay Unit and the Current Transformers.
Figure 1 shows the General System Configuration. The
C/D Unit mounts inside the home, usually in a general
living area such as the kitchen, entry way or family room.
The Relay Unit mounts next to the breaker panel. The
Current Transformers mount in the breaker panel around
the main feeder cables.
4.0 Locating the
Control Unit
4.1
Have the homeowner indicate their preference as to
where the Control/Display (C/D) Unit should be
mounted. The installer needs to look for a convenient
and accessible way to run the control cable from the
location of the relay unit to the location of C/D unit. This
is normally done through an unfinished basement, crawl
space or an attic. The control cable is routed through
an “outside” wall from the garage or wherever the
breaker panel is located. It can alternately be run
through an attic and then dropped down into an interior
wall or strung through a crawl space and brought up
through an interior wall.
4.2
15
Figure 3. 9212 Systems Diagram
Figure 4. Locating and Mounting the Control Unit
The C/D unit
should not
be mounted on an exterior wall
or any wall which is exposed to the outside air or which
may have drafts running through it.
However, if the C/D unit must be mounted on an “out-
side” or exterior wall which may have cold drafts running
through it, insulation must be installed above and below
the mounting position so that the cold temperatures will
not affect the unit’s operation.
5.4"
8"
8"
C
L
7.15"
59"
FROM
FLOOR
CONTROL/
DISPLAY
UNIT
CUTOUT
CURRENT TRANSFORMERS
BREAKERS
LOAD
LOAD POWER SUPPLY
120VAC POWER SUPPLY
RELAY
LOAD CENTER
RELAY UNIT
TO LINE
UTILITY DEMAND METER
4 COND. CONTROL CABLE
DISPLAY UNIT
CONTROL/