Page 223 - Alternative Energy Systems in Building Design

DEMAND-SIDE ENERGY MANAGEMENT AND CONTROL 199

ZCC-1
Zone control center

ZMS4
4-Zone control panel

RTS
Zone temperature sensor
Figure 5.11 A EMS2000 wall-mount controller module. Photo courtesy
of Winn Energy Controls.

raising and cooling setpoints so that electrical demand and energy consumption are
reduced, as might be required during peak-demand periods. It has been widely accepted
that raising the cooling setpoint by 5°F for a period of 8 hours would lower the average
energy consumption by 15–30 percent depending on geographic location. The energy
reduction during the period the setpoint temperature is setup is in addition to the energy
savings produced by the system during normal system operation.
The electric utility service provider also can control any master control unit or
group of master control units through the RF paging system and raise the cooling set-
point or lower the heating setpoint by 1–15°F. This is accomplished by an optional RF
paging receiver built into the master control unit. The new setpoint is activated by dialing
the paging number corresponding to the master control group selected and entering a
code in the same manner as entering a telephone number when paging someone. As
an alternative, the paging also can be automated using a PC with the central software
program. The number entered consists of a verification code, an area group number, a