WattMaster WCC II - Manual (Page 122)

Section 3: Screen Descriptions
WCC II Operator’s Guide
Operator Interfaces 3-90
Default Number of Items to Shed:
This input allows the system to “soft-start” the items connected to
this satellite controller after a power failure. For example, if you
enter 3 for this input, the satellite controller will stage the 3 items
on at the designated shed/restore rate after the power has been
restored to the satellite. Item 3 will be turned on fi rst and item 1
last.
To cause equipment to be turned off when the binary globals are
turned off, use the binary globals listed on this screen to control the
schedule of the equipment. For example, if you want to turn off a
bathroom exhaust fan if the building kW reaches the shed level of
500 kW, as shown on the example screen, then you should control
the bathroom exhaust fan based on a time clock mode which selects
its “ON” schedule by a binary global as outlined below:
Enter a week schedule which corresponds to the
schedule of the exhaust fan. For example, if you
want the exhaust fan to be on during the day unless
the kW demand of the building reaches its peak
but off all the time at night, enter a week schedule
which is “ON” during the day and “OFF” at night.
Create a binary global which is “ON” whenever the
corresponding week schedule is ON.
Input the global binary on a time clock screen as
the binary inputs that select the schedule. A portion
of the time clock screen is shown below:
Contact is: CLOSED in “On” Schedule
Selected by: GB5
When GB5 is “ON,” the contact on the satellite
controller is closed and the exhaust fan is on. When
the building reaches its shed level, GB5 goes “OFF”
which causes the contact to open which causes the
exhaust fan to go off.
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