Panasonic CZ-256ESMC3 Operating Instructions Manual page 10

Demand control
"Demand" indicates the "electricity demand" (average electricity over 30 minutes).
The basic charges for electricity are determined by the maximum value of
demand (the maximum electricity demand). This maximum demand for electricity
occurs during summer and winter when the air conditioning burden is the
greatest. One way of reducing electric power costs is to suppress the maximum
electricity demand during these periods. (Your actual situation depends on your
contract with your electricity provider)
Furthermore, by suppressing the maximum demand for electricity, you can assist
in the reduction of carbon dioxide emissions and help reduce global warming.
Demand control means that the air conditioning units are monitored so that their
electricity consumption does not exceed a contracted amount, and by setting a level as shown in the following diagram (demand 1, 2, or 3), the
performance of the air conditioning units can be controlled so that energy usage is reduced.
This unit suppress the maximum demand for electricity through automated control of air conditioning units by demand control output (demand
output) signals emitted by external equipments.
Demand control (with indoor unit demand settings)
Pulse signal generated
Pulse meter
(electricity)
Pulse detector
Pulse converter
External equipment
Load control output (demand output)
Contact A
Contact B
Contact C
Contact A comes on (when cooling)
Set temperature of indoor unit rises 1 °C
Intelligent Controller
Setting level
Demand 1 (contact A) Set temperature of the indoor unit
±1 °C
Demand 2 (contact B) Set temperature of the indoor unit
±2 °C
Demand 3 (contact C) Indoor unit thermostat OFF
Control group A
Electricity consumed
Demand 1
Demand 2
Setting example
Control group A
No setting
Set temperature of the indoor unit
±2 °C
Indoor unit thermostat OFF
Contact A comes on (when cooling)
Set temperature of the indoor unit
remains unchanged
10
The Energy Saving function
Reduced electricity
consumption
8:00 12:00 16:00 20:00
Control group B
Control group B
Time