Watlow Series 102 - Manual (Page 2)

Watlow Series 102 User’s Manual ■ 2
Figure 2a — Series 102 dimensions.
Figure 2b — Panel cutout and spacing.
• Use the correct sensor type per the model number on the
unit sticker.
• Use the proper thermocouple or RTD polarity.
• Insulate the thermocouple mounting from the mounting
surface to prevent heat migration input errors.
• Thermocouple leads should be twisted pair wire and
routed separately from any other high voltage lines.
• In electrically noisy environments (heavy switching of
contactor, motors, solenoids, etc.) use shielded thermo-
couple lead wire with the shield connected at the sensor
end only.
• All wiring and fusing must conform to the National
Electric Code (NEC) NFPA70 and any other locally
applicable codes.
• Fuse the independent load voltage on the L1 (hot) side
and connect it to the common (COM) side of the relay.
ç
CAUTION: A power disconnect switch located near the controller
is recommended to shut down power in case of controller
failure.
• Long lead lengths create electrical resistance. When using
a two-wire RTD, there will be an additional error for
every 1
Ω
of lead length resistance. That resistance when
added to the resistance of the RTD element, can result in
erroneous input to the temperature controller. To over-
come this problem, use a three-wire RTD sensor, which
compensates for lead length resistance. When extension
wire is used for a three-wire RTD, all three extension
wires must have the same electrical resistance (i.e. same
gauge, copper stranded).
To Mount the Series 102
1. Make a panel cutout, using the dimensions in Figure 2b.
2. Check to see that the external case gasket of the Series
102 is facing the panel surface. Insure that the gasket is
not twisted and is seated within the case bezel flush with
the bezel. Insert the Series 102 into the cutout.
3. Slide the mounting collar over the back of the controller.
The two tabs of the mounting collar will fit into one of the
vent openings of the case.
4. While pressing the front of the case firmly against the
panel, tighten the two #8-32 screws until tight. Make sure
you cannot move the case within the cutout.
Figure 2c — Mounting.
To Remove the Series 102
1. Remove the Series 102 by loosening the mounting screws
located on the mounting collar.
2. Using the screws, gently pry them away from the case.
This will lift the mounting tabs, allowing the collar to
slide backwards.
NOTE: Make sure the rounded side of the D-shaped external case
gasket faces the panel surface and the gasket is fully seated.
Note, caution and warning symbols appear throughout this
book to draw your attention to important operational and
safety information.
A “NOTE” marks a short message to alert you to an
important detail.
A “CAUTION” safety alert appears with information that is
important for protecting your equipment and performance.
A “WARNING” safety alert appears with information that is
important for protecting you, others and equipment from
damage. Pay very close attention to all warnings that apply
to your application.
The ç symbol (an exclamation point in a triangle) precedes
a general CAUTION or WARNING statement.
The Ó symbol (a lightning bolt in a lightning bolt in a
triangle) precedes an electric shock hazard CAUTION or
WARNING safety statement.
Safety Information
Panel Screw Mounting Tab
External Gasket Mounting Collar
Installation
Wiring Guidelines
Panel Cutout
Your Panel
Thickness
0.06 to 0.38 in
(1.5 to 9.7 mm)
1.77 to 1.79 in
(45.0 to 45.5 mm)
1.77 to 1.79 in
(45.0 to 45.5 mm)
0.38 in
(9.7 mm)
minimum
0.85 in
(20 mm)
2.1 in
(55 mm)
square
4.0 in
(102 mm)
Dimensions