Watlow Electric Micro-Based Autotuning Control SERIES 980/985 - Manual (Page 21)

WARNING:
Install high or low temperature limit control protection in systems where an
overtemperature fault condition could present a fire hazard or other hazard.
Failure to install temperature limit control protection where a potential hazard
exists could result in damage to equipment and property, and injury to personnel.
1
CAUTION:
Do not jumper load power from the control power terminals. Doing so will cause
your control to be more susceptible to electrical interference from load switching.
See Noise Guidelines at the beginning of this chapter.
115 Volt
Control Power
1
Earth
Ground
Load
Power
Fuse
Ll
L2 L1
A A
Fuse
Heat L2 Ll
Load Relay Contactor
coil Power
Limit Sensor
1
Figure 24 -
System Wiring
Example
2 CAUTION:
With Watlow mercury relays, load
must have a unity power factor.
For RESISTIVE LOADS ONLY.
NOTE
All fuses must be selected for
proper protection in a given
application.
Ll L2 High Liiit
Control Power
120
140A-16XX-6000
High Limit Control
Process Sensor
Install and Wire, Chapter 2
WATLOW Series 980/985 Use's Manual 21