n
T
0
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.
0
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
0
1
Earth
Ground
Load
Power
Fuse
Ll
-
L2 L1
AA

Iif

Fuse
-

Y!Ef

*

*

Heat
L2
Ll
Load
Relay Contactor
flfi
coil Power
Limit Sensor
I
I
1
Figure 24
-
System Wiring
Example
0
2
CAUTION:
With
Watlow
mercury relays, load
must have a unity power factor.
For RESISTIVE LOADS ONLY.
1
NOTE
All fuses must be selected for
proper protection in a given
application.
Ll L2
High Liiit
.t
+
Control
Power
120
YAC
140A-16XX-6000
High
Limit Control
I
1
I

I

’

Process Sensor

I

Install and
Wire,
Chapter
2
WATLOW Series
980/985
Use's
Manual
21