Comfort Plus
Installation
3.09
PEAK CONTROL CONNECTIONS
Steffes ETS heating equipment may be controlled by the Power Company via
a peak control signal. This signal can be sent to the equipment using a Steffes
Power Line Carrier control system, low voltage wiring, a Steffes Time Clock
Module, or line voltage wiring. In applications utilizing automatic charge
control, outdoor temperature information is required and can be received via
an outdoor sensor or power line carrier control system.
The Comfort Plus heating system is factory configured for low voltage wire
control and is set to charge when the utility peak
control switch closes. Refer to the Configuration
Menu (Pages 3.13-3.14) for information on
configuring the system for the application.
LOW VOLTAGE (DIRECT WIRED) PEAK
CONTROL
If using the low voltage peak control option, the
Comfort Plus is direct wired to the power company's
peak control switch. Field connections from the
peak control switch are made to the low voltage
terminal block through a low voltage knockout
located on the left side of electrical panel.
Step 1
Route a low voltage circuit from the
power company’s load control or peak
signaling device to the terminal block
inside the electrical compartment of the
Comfort Plus.
Step 2
Connect the field wiring to positions "RP" and "P" on the terminal block as shown in Figure 13.
To control other devices, refer to the Auxiliary Load Control on Page 3.12.
POWER LINE CARRIER (PLC) PEAK CONTROL
The Steffes Power Line Carrier (PLC) control system has the ability to communicate with the system through the
existing electrical circuits in the structure. With the power line carrier option, direct wired low voltage connections
from the power company's peak signaling switch connect directly to the transmitting device. The switch signals
peak control times to the transmitter, the transmitter sends the signals to the Comfort Plus 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 system 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. The
optional time clock module mounts inside the line 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
information on the installation and operation of this device.
Never install any wiring in
a line voltage compartment
of the Comfort Plus unless
it is rated for line voltage.
IMPORTANT
Terminal Block Coding
RP = Peak Control Input Common
P = Peak Control Input
AP = Anticipated Peak (Pre-Peak) Control Input
COM = Peak Control Output Common
NC = Peak Control Output (Normally Closed)
NO = Peak Control Output (Normally Open)
PEAK CONTROL
TERMINAL CONNECTIONS
FIGURE 13
NOTE:
