JOHNSON CONTROLS
51
FORM 160.72-O1 (810)
HGVRAT – Hot Gas Bypass Ratio
The percent the Hot Gas valve will open for each per-
cent the PRV’s goes below the Hot Gas Ratio Calcula-
tion
TSP3 - Hot Gas Bypass Temperature Controller
Degrees below the Leaving Chilled Liquid Temperature
Setpoint that the Hot Gas Valve will begin to open.
RRSP2 – Hot Gas Ramp Rate
Rate in Percent per second the Hot Gas valve will
open.
Demand Limit Mode
Current / Power
Determines the source of motor limit control
Current – By CT’s on the motor leads
Power - KW meter
Pre-rotation Vane Minimum Startup Position
The minimum position for the vanes at startup
RRSP8 – PRV Ramp Rate
Rate in Percent per second the PRV’s will open.
Override Off Delay
Displays the time delay required for pressure overrides
to clear
Minimum Evaporator Pressure for Tempera-
ture
This setpoint defines the minimum evaporator pressure
required at startup before the leaving chilled liquid is
considered valid for temperature control of the Pre Ro-
tation Vanes (PRV’s)
Temperature Controller Auto Mode Tempera-
ture
Displays the temperature difference between the leav-
ing chilled liquid setpoint and the leaving chilled liquid
temperature required to begin automatic control of the
Pre Rotation Vanes (PRV’s) to maintain setpoint.
SETPOINTS SCREEN
SETPOINTS SCREENFIGURE 17 -
3
To Next Page
Loading...
