POWER LINE CARRIER (PLC) PEAK CONTROL
The Steffes Power Line Carrier (PLC) control system has the ability to communicate with the Comfort Plus
Hydronic system through the existing electrical circuits in the structure. With the power line carrier option, hard
wired low voltage connections from the power company's peak signaling switch connect directly to the transmit-
ting device. The switch signals peak control times to the transmitter, the transmitter sends the signals to the
Comfort Plus Hydronic system, which receives this information and responds accordingly.
In addition to providing peak control signals, the transmitter also provides outdoor temperature information for
automatic charge control, room temperature set back, and anticipated peak utility control signals (if applicable).
The PLC control is optional and must be ordered separately. If utilizing a PLC system, an Owner's and
Installer's manual will accompany the transmitting device. Refer to this manual for information on the installation
and operation of the power line carrier control system.
TIME CLOCK MODULE PEAK CONTROL
The Steffes Time Clock Module is another option for providing a peak control signal to the Comfort Plus Hy-
dronic. It mounts inside the system
’
s low voltage electrical compartment and interfaces with the relay board via
an interface cable. Peak control times must be programmed into the system once the module is installed to
enable the time clock feature. Refer to the instructions provided with the Time Clock Module for more informa-
tion on the installation and operation of this device.
LINE VOLTAGE PEAK CONTROL
Line voltage control is also an option, but is not the preferred method of control as it is usually more complex and
expensive. If line voltage control is utilized, the controls circuit must be powered with an uninterrupted circuit.
An external switching device, such as a relay panel, is necessary to directly control the heating element charging
circuits. If relying on this method of control, the faceplate on the system MUST continuously display a brick
core operating mode of
“
C
”
(charge) regardless of whether it is an off-peak or on-peak period. Refer to C005 of
the Configuration Menu for proper settings. (Reference Pages 3.14-3.15.)
LOW VOLTAGE ELECTRICAL CONNECTIONS - OUTDOOR
TEMPERATURE SENSOR (REQUIRED)
Installation Methods: A) Hard wired to system to the "OS"
and "SC" terminals (default)
OR
B) Connected to Power Line Carrier
(PLC)
Theory of Operation: The outdoor sensor monitors outdoor
temperature and provides this infor-
mation to the system. The system responds by automatically storing heat in its brick
core according to outdoor temperature and the heating requirements.
Location of: The outdoor sensor must be placed in a location where it can accurately sense outdoor tempera-
ture and is not affected by direct sunlight or other abnormal temperature conditions.
IMPORTANT
If connecting to the Steffes power line
carrier (PLC) system, follow the instal-
lation instructions in the PLC system's
Owner's and Installer's Guide.
In
st
al
la
ti
on
Comfort Plus Hydronic
Installation
3.08
