14
Saturday/Sunday On/Off Peak (SS):
Sets weekends to
On-Peak or Off-Peak depending on the local utility’s rate.
If your utility has On-Peak periods on weekends, set to
“on”. If weekends are Off-Peak, set to “oFF”.
Holiday (Hx):
where “x” is Holiday 1 through 9. The fi rst
four holidays are date-specifi c holidays or holidays that
occur on the same date each year. These holidays are set by
date (month and day of month) in any order. The defaults
are H1: New Year’s Day (1/1); H2: Fourth of July (7/4);
H3: Christmas Day (12/25); and H4: Undefi ned (0/0).
Holidays 5-9 are dual purpose holidays which can be
date-specifi c (same date each year - as described above)
or holiday-specifi c (same day each year). The defaults
are H5: President’s Day (3rd Monday in February); H6:
Memorial Day (1st Monday in June); H7: Labor Day
(1st Monday in September); H8: Thanksgiving Day (4th
Thursday in November); and H9: Friday after Thanksgiv-
ing (4th Friday in November). To enable these holidays as
Off-Peak days, set them to oFFP and the system will not
control On-Peak demand levels on these days. To use H5-
H9 as date-specifi c holidays, set the holiday to the desired
date. If used in the date-specifi c mode, the pre-assigned
holidays will no longer be Off-Peak days.
If the utility company doesn’t recognize a holiday that is
listed above as Off-Peak, disable the holiday by setting it
to onP for On-Peak and the 9312 will continue to manage
demand levels on these days.
Off-Peak Peak Demand (oP):
The highest average
demand (Ad) which has occurred (since last reset) during
the Off-Peak periods. This is helpful in determining how
high uncontrolled demand peaks can be. To reset, set the
9312 to “oP” mode, press the Reset Peak key.
Off-Peak Limit (oL):
The demand limit during the time
the 9312 is in an Off-Peak period. Adjustable from 2.0
KW to 49.5 KW in the 40 KW demand range, 4KW to 99
KW in the 80 KW demand range, or to oFF, oFF2, oFF3,
oFF4, or oFF5. oFF2-oFF5 are multipliers of the On-Peak
demand limit as defi ned by the rate structure of the utility
(i.e. if oFF2 is used, the Off-Peak demand limit is two
times the demand limit set during On-Peak times). If your
utility does not meter demand during Off-Peak periods, set
the Off-Peak limit to oFF. The 9312 will not control during
Off-Peak periods when set to oFF. For proper system
operation, the Off-Peak demand limit must be greater than
the On-Peak demand limit. The demand limit set here will
be displayed in the Display mode (dL) in the Main Loop
ONLY during Off-Peak periods.
Maximum Instantaneous (HL):
This setting controls
the highest instantaneous load that the 9312 will allow. This
setting is used in conjunction with generators or when there
is a restriction on the maximum instantaneous demand that
may be drawn. When the instantaneous demand exceeds
the HL setting, the system will respond by shedding one
or more loads within 4 seconds. The HL setting must be
greater than the demand limit setting to operate properly. It
is not recommended to use the HL mode in normal demand
control applications. To disable this setting, set to oFF.
Number of Relays (Loads) Connected (nr):
This setting
tells the 9312 how many relays are installed, starting from
Control Point #1 and counting up to #16. This setting turns
off unused control points. The number programmed into
this setting should be equal to the number of relays and
all relays should be on consecutive control points starting
with #1. Only control points enabled at this setting will
appear in subsequent settings for priorities, Minimum
On-Times and Minimum Off-Times. Furthermore, only
enabled control points Circuit On LED indicators will be
lit on the Control/Display Unit.
Priority (Pr):
The priority of each load relative to all other
loads connected to the 9312, where 1 is the highest priority
and 16 is the lowest. Each control point (x) is adjustable
from a priority of 1 to 17. However, the normal priority
range is 1 to 16. Loads connected to relays with a prior-
ity of 17 are turned off during ALL On-Peak periods and
restored only during Off-Peak periods.
Minimum On-Times (on):
This sets the 0 to 20 minute
Minimum On-Time for each control point (x). Any control
point having a heat pump or air conditioner compressor or
other motor load connected to it should have a Minimum
On-Time programmed of at least 5 minutes. Minimum
On-Times should be as short as possible and should not
be used unless necessary because they restrict the 9312’s
ability to control demand. Use of Minimum On-Times
may cause the meter’s demand to exceed the set demand
limit of the demand management system.
Minimum Off-Time (oF):
This sets the 0 to 20 minute
Minimum Off-Time for each control point (x). Any control
point having a heat pump or air conditioner compressor or
other motor load connected to it should have a Minimum
Off-Time programmed in of at least 4 minutes.
Demand Control Algorithm (dC):
This setting selects
one of four demand control algorithms which defi nes the
amount of risk the 9312 system will take in controlling
loads and still be able to maintain the demand limit. Algo-
rithm #1 is the most conservative and tries at all costs to
maintain the demand limit. Algorithm #4 is the least con-
servative and uses the demand limit more as a guideline
rather than an absolute limit.
Averaging Period (AP):
This sets the demand averaging
interval to 15, 30 or 60-minutes. This should coincide with
the utility’s averaging period of its demand meter.
Demand Range (dr):
Sets the demand range to either
40KW for 200 Amp CT’s or 80KW for 400 Amp CT’s.
The system default is 40KW for 200 Amp CT’s (400 Amp
CT’s are optional and installed only by special order).
Setting the System Loop
To enter the System Loop from the Main Loop, hold
down the Alarm Volume and Reset Peak keys simultane-
ously for 5 seconds. Once the display reaches the fi rst
System Loop setting (dE), release keys. To step through
System Loops settings, press the Demand Limit key
repeatedly until the desired setting is reached. All set-
tings are listed on pages 15 and 16. Press the Increase or
Decrease keys until the desired value is reached on the
display for that particular setting. Release keys and step
to the next System Loop setting desired by pressing the
Demand Limit key again. If keys are not pressed within
2 minutes, the display will return to the Main Loop. To
escape from the System Loop, press the Display key and
you will jump back into the Main Loop.
