Steffes 7140 - Manual (Page 10)

LOAD MANAGEMENT CONTROL
The Comfort Plus Commercial Hydronic system is an Electric Thermal Storage (ETS) heating system using electricity
to provide a low cost heating solution for commercial, industrial, and large residential applications. ETS equipment
is designed to store electricity, as heat, during hours when energy costs are lower and kW demand charges are not
incurred. The Comfort Plus Commercial's thermal mass consists of a high-density ceramic brick capable of vast
heat storage.
The system is designed to operate under one of three different load management control strategies.
1. BACNet Control
Steffes commercial heating furnaces are available with a BACNet control
option. This device is easily integrated into most building automation systems to
provide building managers full control and visibility of the heating system’s
operation. BACNet allows the following functions to be monitored with simple,
twisted pair communication:
· Real time system monitoring
· Full thermostat control
· Monitoring of heat storage levels in the brick and all system temperatures
· Remote configuration, testing and adjustment
· Service requirement alerts
2. On-Peak/Off-Peak Program
System responds to heat calls during the on-peak and off-peak periods; however, only energizes heating
elements during the off-peak periods. The Comfort Plus Commercial system is controlled by an external
control device such as a meter or time clock module.
3. 4-20 Milliamp Control (1-5 volt DC)
System receives a signal from an external load control device such as a building load management system.
This external signal dictates the maximum amount of energy which can be consumed during a preset time
interval.
4. Pulse Monitoring
a) System monitors pulse outputs from the power company's electric meter.
Program parameters such as desired maximum building kW and pulse
ratios for the metering system being used are entered into the Comfort
Plus Commercial system. The system then charges proportionally when
demand free power is available. This keeps the total building kW usage at
or below the desired level.
b) External load management control modules are available when using pulse
monitoring load control. Each module has eight (8) zones which can be
controlled. The system must be configured to recognize the number of load
management modules installed (maximum of two per system).
Optional Accessories
n
2.03 Comfort Plus Commercial Hydronic
Accessories
BACNET
Order Item #1301015
LOAD MANAGEMENT
CONTROL MODULE
Order Item #1908140