Carbolite Gero 3216OT User manual

MC30 - 1.01
Operating Instructions
Over-Temperature Controller

Type 3216OT
Set point tracking
English

2
MC30 –1.01

301 Controller
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MC30 –1.01
Contents
1DESCRIPTION 4
1.1 3216OT OVER-TEMPERATURE CONTROLLER 4
1.2 KEYS 4
2BASIC OPERATING INSTRUCTIONS 5
2.1 FURNACE OR OVEN CONTROLS 5
2.2 THE 3216OT OPERATION 5
2.3 BASIC OPERATION 5
2.4 OVER-TEMPERATURE ALARM 6
2.5 RESETTING THE OVER-TEMPERATURE ALARM 6
2.6 SENSOR BREAK 6
3AUDIBLE ALARM 6
4NAVIGATION DIAGRAM 7
4.1 3216OT 7

Introduction
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MC30 –1.01
1 Description
1.1 3216OT Over-Temperature Controller
1.2 Keys
Page Key 
The Page key is used to access level 2 when held down
for 3 seconds.
Scroll Key 
The Scroll key is used to scroll through the parameters.
ACK
Page + Scroll

When pressed simultaneously the ACK function is used
to:
Return to the Home Menu.
Acknowledge timer end.
Acknowledge an alarm if activated.
Arrow Keys

The arrow keys are used individually to adjust the
selected parameters and in combination to run a program
Note: If a parameter is selected and no further action is taken, the display will time out and
revert back to the home display in its working level after approximately 1 minute
Power Output
Indicator
Scroll Key
Down Key
Up Key
Alarm
Indicator
Hold Indicator
Set point
Temperature
Measured
Temperature
Run Indicator
Remote
Indicator
(When configured)
Scroll Key
Page Key

Basic Operation
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MC30 –1.01
2 Basic Operating Instructions
2.1 Furnace or Oven Controls
Most Carbolite Gero products are fitted with an “Instrument Switch” which cuts off power to
the controller and other parts of the control circuit. See the instruction manual for the
furnace or oven for the overall operating instructions.
To operate the 3216OT there must be power to the furnace or oven, and the Instrument
switch must be on. If a time switch is included in the furnace or oven circuit, this must be in
an On period.
When an over-temperature condition occurs, the controller cuts the power to a contactor,
which in turn cuts power to the heating elements. Power is not restored until the controller is
“reset”. Other components do not generally have power to them cut on over-temperature;
oven fans usually remain running, but may not do so if other options (such as a door switch)
are fitted.
2.2 The 3216OT Operation - Set Point Tracking
When switched on, the controller lights up, goes through a short test routine, and then
displays the measured temperature and the over-temperature set point.
The 3216OT set point tracking is connected internally to the main temperature controller.
The main controller transmits its set point value to the over temperature controller. A local
deviation high alarm of 15C is added to the retransmitted set point. The over temperature
controller thus automatically tracks the main set point and does not require adjustment
when changing the main temperature controller set point.
If the oven is hot and the set point of the main controller is turned down more than 15C
then the over temperature circuit will trip.
The Scroll key allows access to the parameters within a list. Some parameters are
display-only; others may be altered by the operator.
A single press of the scroll key in the Home list displays the ID.
To return to the Home list at any time, press Page and Scroll together, or wait for 45
seconds.
The Down and Up keys are used to alter parameter values.
2.3 Basic Operation - Set Point Tracking
No adjustment of the over temperature controller is necessary in normal use. The unit is
supplied with the tracking over temperature value set to track at 15°C above the furnace or
oven set point temperature.

Navigation
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MC30 –1.01
2.4 Over-Temperature Alarm
If an over-temperature condition occurs, the OP2 indicator flashes, and an alarm message
OVEN TRACKING OVER-TEMPERATURE scrolls across the screen, alternating with the
set point. Power to the heating elements is disconnected.
2.5 Resetting the Over-Temperature Alarm
To acknowledge the alarm press Scroll and Page together.
If the alarm is acknowledged while there is still an over-temperature condition, the OP2
indicator stops flashing but continues to glow. The OVEN TRACKING OVER-
TEMPERATURE alarm continues to scroll until the over-temperature condition is cleared
(by the temperature falling), when normal operation resumes.
If the alarm is acknowledged when the temperature has dropped such that the over-
temperature condition no longer exists, then the furnace or oven immediately resumes
normal operation.
2.6 Sensor Break
The over-temperature cut-out system also operates if the over-temperature control
thermocouple breaks or becomes disconnected. The message S.br flashes where the
measured temperature is normally displayed.
3 Audible Alarm
If an audible alarm is supplied for use with the over-temperature controller, then it is
normally configured to sound on over-temperature condition, and to stop sounding when the
alarm is acknowledged as given in section ‘2.5 Resetting the Over-Temperature Alarm’.
Note that the alarm may sound during controller start-up.
It is not possible to cover in this manual other possible alarm features which may be
included by customer special order.

Basic Operation
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MC30 1.01
4 Navigation Diagram
4.1 3216OT
(Read / Write)
(Read / Write)
(Read / Write)
(Read only)
Passcode = 9


3 Sec

LEVEL 1
ACCESS
LEVEL 2
PV
LEV
PV
SP
GOTO
SP
A1 DHI
ID
units

ID

Copyright © 2016 Carbolite Gero Limited
Carbolite Gero Limited, Parsons Lane, Hope,
Hope Valley, S33 6RB, England.
Telephone: [phone]
Fax: [phone]
E-mail: [email protected]
For preventive maintenance, repair and calibration of
all Furnace and Oven products, please contact:
Carbolite Engineering Services
Telephone: [phone]
Fax: [phone]
Email: [e-mail]
MC30 –1.01 01/01/16