Watlow Series 104 - Manual (Page 2)

Figure 3a — Series 104 dimensions.
Use the following procedure to mount and install the
Watlow Series 104 temperature control.
1. Locate and drill four 0.156 in (4 mm) holes in the desired
panel location. See Figure 2a for hole locations.
2. Mount the Series 104 using four #6 screws.
3. Connect the sensor, load, and power as illustrated in the
wiring diagrams on pages 3 and 4. See the wiring
diagrams.
• 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.
• Long lead lengths create electrical resistance. When using
a two-wire RTD, there will be an additional input 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 control. To
overcome 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).
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 triangle) precedes an
electric shock hazard CAUTION or WARNING safety
statement.
120VÅ 104 _ - 1 _ _ _ - 0000
230 to 240VÅ 104 _ - 2 _ _ _ - 0000
NOTE: The line voltage is specified by your model number.
Figure 3b — Power wiring.
Ó
WARNING: To avoid potential electric shock, use National Electrical
Code (NEC) safety practices when wiring and connecting this unit to
a power source and to electrical sensors or peripheral devices.
Failure to do so could result in injury or death.
All wiring and fusing must conform to the National Electric
Code and to any locally applicable codes.
ç
CAUTION: Applying incorrect line voltage may result in irreversible
damage to the controller.
00
50
100
150
200
250 300
350
400
450
500
4.500"
L1 L2
Recommended fuse size: 1A Fuse
Power Wiring
Safety Information
Wiring Guidelines
Installation
00
50
100
150
200
250 300
350
400
450
500
4.500"
4.0 in (102 mm)
4.5 in (114 mm)
3.5 in
(89 mm)
4.0 in
(102 mm)
Dimensions
2 ■ Watlow Series 104 User’s Manual