Thermon Caloritech OKT Instructions Pour L'installation

Type OKT Percentage Timer
Installation Instructions
Description
1. Percentage timers (input controllers) are used mainly for
pulsing power to tubular element type radiant heaters.
They should not be used for quartz lamp or quartz tube
type radiant heaters.
2. The OKT percentage timer operates by switching the
supply voltage on and off over a total time cycle of
30 seconds. The dial reads percentage On time. If the
dial is set to 40, the output will be on for 12 seconds and
off for 18 seconds, i.e. 40% of 30 seconds On and balance
of 30 seconds Off.
3. A synchronous motor driven cam closes a snap action
switch for a percentage of the total time cycle. Settings
may be made or changed with the timer operating.
Switching to the Off portion of the cycle occurs as the
progress pointer passes the 100% dial position.
4. The OKT percentage timer features a black set point
needle, a red progress pointer, and an isolated pilot light.
5. A unique feature of this timer is its plug-in mounting.
Several gasketed surfaces ensure resistance to dust and
moisture as found in normal industrial environments.
Installation
1. The OKT is designed for mounting in a panel or an
enclosure. Mounting dimensions and cutout sizes are
shown below in Figure 1.
Figure 1
2. To install, loosen locking screw, lift handle and pull
control from enclosure. Make panel cutout and mount
the OKT terminal box with the included hardware.
Ensure that the gasket supplied is intstalled between
the mounting plate of the terminal enclosure and your
panel.
CCI Thermal Technologies Inc. 2721 Plymouth Drive, Oakville, ON L6H 5R5 Tel. (905) 829-4422 Fax (905) 829-4430
Wiring
1. Control power for the motor is 120V 60 Hz 4 Va. The load
contacts can be wired for a 120V pilot duty control circuit
or wired independently to a separate power supply as
follows:
–
–
–
–
2. Rear terminals connections are as follows in Figure 2:
Figure 2
3. Typical pilot duty wiring is as follows:
Although both normally open and normally closed contacts
are brought out to the rear terminals, use terminals 3 and 4
only for percentage 'on' heating operation.
Figure 3
Operation
1. Adjust the knob and black pointer to the percent 'on'
time desired. When the system is energized, the red
progress pointer will rotate counter clockwise. When
the red pointer meets the black pointer the load is
energized and the pilot light is illuminated (if wired as
per Figure 3). When the red pointer passes 100, the load
will de-energize.
2. While energized and running, adjustments to the time
can be made.
3. Allow sufficient time for the system to reach equilibrium
www.ccithermal.com
before making adjustments.
Part No. MI122.Rev.5.03
10 Amps at 120/240V AC
1/3 HP at 125/250V AC
1/2 Amp at 125V DC
1/4 Amp at 250 V DC
Jan 2024
MI122 R
ISO 9001:2000
ISO 9001:2000
ISO 9001
Printed in Canada