South Bend, Indiana USA
|
networketi.com
PT-SINGLE
INSTALLATION MANUAL | PART NO.
25166
REV
D
7
Power Fail. Critical alarms always turn off the heat, unless
Fire Protect Mode is ON. To continue normal operation,
any of these will require a manual reset. The manual reset
(TEST/RESET BACK pushbutton) will start a self test, and
if all Critical Alarms are cleared then normal operation
will resume.
Non-critical Alarms can be Latching or Non-Latching
depending on the Latching setting alarms and include
Low Current, Low Temperature, High Temperature,
and Sensor Fault. A Sensor Fault will stop temperature
regulation (with heat on or off depending on the Fail
Mode setting), but as soon as the sensor is corrected,
then operation will immediately resume. The other Non-
critical Alarms do not inhibit operation.
Note:
Latching alarms require manual clearing to resume
operation.
The Manual Self Test clears all alarms, checks Ground
Fault Current, and checks Low Current if the Low Current
delay is set to five seconds or less. The Auto Self Test does
not clear alarms, but otherwise functions the same as the
Manual Self Test.
PT-SINGLE
Front Panel
Indicator Lights (See Figure 8.)
• POWER indicator – This green LED indicates that the
PT-SINGLE
is receiving power.
• HEAT indicator – This yellow LED indicates when the
heater is energized.
• LOW TEMP indicator – This blue LED indicates when
sensors detect temperature has fallen below the Low
Temp Alarm threshold.
• ALARM indicator – This red LED indicates when there is
high ground fault current detected or any other alarm
condition exists.
Note:
Because the unit has no ON/OFF power switch,
power runs to the unit as soon as facility power is
connected to it. When the unit has power, the green
POWER indicator will be lit.
CONTROLS AND SCREENS
CONTROLS
Pushbuttons
•
UP and DOWN
pushbuttons – These black pushbuttons
change the display and menu screens. They are also
used for changing settings or values within the menus.
•
ENTER
pushbutton – This green pushbutton is for
selecting and entering settings or values within the
menu.
•
TEST/RESET BACK
pushbutton – This red pushbutton
has the following functions:
– To test the ground fault detector circuit itself AND
to test for a ground fault when the heat load is not
energized (the heater will energize during the test).
This will also test for Low Current if the Low Current
delay setting is set to 5 seconds or less. Note:
whenever the heat is on, the unit is continuously
checking for a ground fault.
– To reset the system after a ground fault. If the ground
fault no longer exists, then normal operation will
resume.
– Clearing any other latched alarm conditions if the
alarm condition no longer exists.
FIGURE 8.
PT-SINGLE
front panel
UP
DOWN
ENTER
GPT 130
HEAT TRACE CONTROL
POWER
HEAT
LOW TEMP
ALARM
TEST / RESET
BACK
