20.6
○
C
19
Screen Indication (PXVC-PT)
1 = Superheat/subcool value
2 = Actual pressure/temperature
Up
Increase SET POINT
(Parameter setting: SCROLL menu
options and parameters)
Center (POWER)
Press > 2 sec.: turn unit OFF.
(PXVC-PT default remote interlock ON
disables manual OFF)
(Parameter setting: ENTER to select
menu option, accept parameter change)
Large Digits
Display of
measured value
Small Digits
Display of set
point value
PI sequence
ramp-up delay
active
Indicators
Active alarm
Vertical Bar
Output Status
10% resolution
Left (ESC)
Select screen 1, 2 (PXVC-PT)
Parameter setting: Escape
menu, discard parameter value
Down
Decrease SET POINT
(Parameter setting: SCROLL menu
options and parameters)
Right (Option)
Instantaneous Press (< 2 seconds)
accept menu/parameter option (enter key)
Hold Button (> 2 seconds) clear
5
PXVC
AUGUST 2018
MOUNTING CONSIDERATIONS:
Ensure the controller has adequate protective enclosure
for the environment, enclosure required for wet or
condensation prone environments. Ensure the controller
has adequate heating if the environment is below 32°F
(0°C). Controller may be surface mounted with two #4
screws or controller may be mounted to a DIN rail
SYSTEM STARTUP:
1. During operation the power button is not available
to be used to stop the system, so before starting the
controller connect a remote interlock and close the
circuit to disable the controller.
2. Power on the controller and verify the screen is
flashing to indicate the controller is not active. If the
interlock is not active, try operating the switch, if this
does not work power down the system and check the
controller jumpers, switch and wiring, contact Hansen
for further support.
3. Once interlock is disabled, verify the screen indicator
displays an underscore under the number “1,” as shown
in the user menus section. Screen #1, the default
screen, displays the measured value and the set point.
Screen two is available on all of the controllers, however
only the PXVC-PT offers additional information in the
form of temperature and pressure readings.
4. Pressing the up or down arrows will increase or
decrease the set point
5. Pressing the left arrow will either escape (go back)
from a menu or if at the main menu show the second
screen on PXVC-PT models. On other models Hansen
recommends only utilizing screen 1.
6. Set the controller to the desired set point, and wait
for the controller to approach the desired set point
(%, degrees, PSI).
7. Operating conditions should be monitored closely
during startup, and the interlock may be used if
necessary to stop the controller
8. The remote interlock should be connected to the
control system and used to disable the controller for
any applicable conditions, including but not limited
to: Defrost cycles, System Shutdown, etc.
USER MENUS
CHANGING PARAMETERS:
1. Press UP/DOWN buttons simultaneously for three
seconds. The display will show firmware version and
hardware revision number. Press the OPTION button
to start login.
2. CODE is shown in small digits display.
3. Select the relevant Parameter Access Code using UP/
DOWN (refer to controller subsections with parameter
listings)
4. Press OPTION button after selecting the correct code.
5. Select the parameter required with the UP/DOWN
buttons. Change a parameter value by pressing the
OPTION button. Three arrows are displayed to indicate
that the parameter may be modified. Use UP/DOWN
buttons to adjust the value.
6. Upon completion press the OPTION button to save the
new value and return to menu selections (three arrows
should disappear), pressing the POWER button will
discard changes without saving, press the esc button
to return to the next highest level menu
7. The POWER button may be used to exit the menu
as well, otherwise the unit will return to the default
screen when no button has been pressed for longer
than 5 minutes.
8. It is recommended that only personnel experienced
in control loops adjust control settings.
There are
sets of control parameters (P and I values) for direct
acting and reverse acting controllers, if adjusting
the control parameters ensure you select the correct
parameter
PXVC UNIVERSAL CONTROLER
a. PXVC-(PT,DX,T) are direct acting controllers
meaning the output is directly related to the input
(temperature increases and valve opens)
b. PXVC-(P,L) are reverse acting controllers meaning
the output is inversely related to the input (level
or pressure drops and valve opens)
