Johnson Controls YORK OPTIVIEW CONTROL CENTER, Руководство по эксплуатации

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JOHNSON CONTROLS
56
FORM 160.10-O1
ISSUE DATE: 4/27/2018
SECTION 2 - OPTIVIEW OPERATION
Delta P/P
Delta P/P is a parameter that represents system pres-
sure differential or “Head”. This value is calculated by
subtracting evaporator pressure from condenser pres-
sure and then dividing by the evaporator pressure.
(condenser pressure – evaporator pressure) /
evaporator pressure
PROGRAMMABLE
VSD Start Frequency
Access Level Required: ADMIN
Allows the setting of the motor frequency on startup.
This will also cause the motor to rapidly ramp to this
frequency to prevent surging.
Stability Limit
This setpoint controls how sensitive the ACC is to the
stability of the leaving chilled liquid temperature by
adjusting the pre-rotation vane control algorithm when
used in conjunction with an ACC board. This setpoint
is a relative value of magnitude and is adjustable from
1000 to 7000. Higher values decrease sensitivity.
Surge Margin Adjust
When the ACC maps a surge point, the ACC will be-
gin to adjust the chiller command frequency and vane
controls at a certain “margin” of motor speed above the
mapped point. This programmable value allows the ser-
vice technician to modify the “margin” at which these
adjustments will begin to take place to allow more of a
cushion between surge points and motor speed.
ACC Auto Map Print (Enabled / Disabled)
The chiller monitors the ACC communications and
when a surge point is mapped, a short report of system
parameters is printed.
When the ACC auto map print feature is
enabled, all other printing capability is
disabled.
ACC Map Report
The chiller requests the entire surge map from the
ACC. As the map is received, the parameters for each
point are printed.
Manual Surge Point
This key will force the ACC to map a surge detection
at the present operating conditions. Mapping a point at
these conditions will cause the ACC to make adjust-
ments to the command frequency in the future in order
to prevent the chiller from operating at the conditions
mapped.
Use caution in adding manual surge
points to the ACC map. Poor chiller opera-
tion will result if a manual surge point is
improperly mapped.
Surge Map Clear
This key instructs the ACC to clear all of the surge
points presently mapped. This key will require confir-
mation of the clear by entry of a special password.
VSD Start Frequency
Access Level Required: Admin
This allows for setting the start frequency to prevent
the chiller from surging on startup. This does not pre-
vent the chiller from going below this setting but al-
lows for rapid ramp to this frequency.
Use caution when clearing the surge
map. If the surge map is cleared, poor
operation will occur until surge points
are re-mapped.
NAVIGATION
Home
Access Level Required: VIEW
Returns the display to the Home screen.
VSD
Access Level Required: VIEW
Returns the display to the VSD screen.