STULZ E
2
SERIES CONTROLLER FOR PERIMETER SYSTEMS OPERATION MANUAL
32
5.4.1 Setpoint Screens
CONTROL
Version
SET
Alarm Set
The Setpoints (SET) screens below may be accessed from the
Control menu.
Temperature
Set Point 72.0°F
STATUS________________
Temp: 72.6°F Set:72.0°F
Dew: 50.1°F
Press ( ) Key
Humidity
Set Point 45.0%
STATUS________________
Hum: 45.5°F Set:45%
Dew: 50.1°F
The Temperature and Humidity setpoint screens allow the
operator view and adjust the control setpoints and compare
them to system level operating data derived from the various
Sensor/Transmitter inputs.
5.4.1.1 High Pressure Auto Reset (Optional)
High Pressure Limit
HP Limit: 375psi
HP Rst Min: 200psi
If the compressor discharge pressure rises to the limit value
entered, the compressor turns off. After the compressor
minimum off time delay expires, the controller polls the
discharge pressure sensor to determine if it is safe to start again.
If the pressure is below the high pressure reset minimum (HP
Rst Min) value entered, the compressor restarts. If the discharge
pressure is not below the high pressure reset minimum value,
the compressor remains off. The controller polls the sensor a
total of three times to attempt to start the compressor, each
time following the compressor minimum off time delay period.
If the discharge pressure is still not below the high pressure
reset minimum value after three attempts, the compressor is
disabled and a high pressure alarm is signalled. This is a critical
alarm requiring the controller to be manually reset by pressing
the alarm key on the user interface display panel.
5.4.1.2 Max GPM
CW1 Max GPM
Max GPM: 40.0
Current GPM: 23.4
Del T1 Flow On: 1.5
Del T1 Flow Off: 2.0
Valve: 45.5%
If the customer sensor(s) are set for Calculate GPM in
Factory>Options>Enb Special Sensors, then the GPM menus
for CW circuit 1 and 2 (if appropriate) are enabled. The maximum
GPM is used to limit the CW valve opening. The current GPM is
the calculated GPM. Del T1 Flow ON is the number of degrees
below the leaving water temperature that the entering water
temperature must be to enable GPM calculations. Del T1
Flow OFF is the number of degrees below the leaving water
temperature that the entering water temperature must be to
disable GPM calculations. The bottom fi eld in the screen (Valve)
is the current position of the valve as a percentage of fully open.
5.4.2 Alarm Setpoint Screens
CONTROL
Set
ALARM SET
Clock
The Alarm Setpoints screens are accessed from the Control
menu. They allow the operator to enable the High and Low
temperature and humidity alarms, adjust their setpoints and
compare them to the control operating setpoints and to
the system level operating data derived from the Sensor/
Transmitter inputs.
Temperature Alarm
High alarm Enable:Yes
Set Point 80.0°F
STATUS________________
Temp: 72.6°F Set:72.0°F
Dew: 50.1°F
High Temperature Alarm
Temperature Alarm
Low alarm Enable:Yes
Set Point 60.0°F
STATUS________________
Temp: 72.6°F Set:72.0°F
Dew: 50.1°F
Low Temperature Alarm
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