Install Instructions

CONTROL WIRING

General

• All wiring should conform to the Naonal Electric Code and local

regulaons.

• The total electrical load must not exceed the maximum rang of the

control (see Specicaons).

• Use copper conductors only.

• Electrical leads should not be taut; allow slack for temperature

change and vibraon.

Input and Output Wiring

For typical wiring diagrams, refer to Figures 6 and 7. All connecons are

made to the power (lower) circuit board. When using the 24V AC

powered models, the 24V AC input lines must enter through the

sidewall of the case. Refer to Figure 5 for locaon of the entry hole.

Analog Output

ETC models are available with an oponal 0 to 10 volt analog output.

This signal is a linear representaon of the sensor temperature with

0 volts = -30°F and 10 volts = 220°F. See gure 8 for wiring informaon

and Figure 5 for locaon of the entry hole. The reference for this output

is designated by the ”-” symbol on the wiring diagram. The output

signal is designated by the ”+” symbol.

Figure 8: 0-10 V Analog Output

Located on Power (Lower) Circuit Board

Figure 7: Typical Wiring Diagram for 24 VAC Power Input

and Line Voltage Switching.

Figure 6: Typical Voltage Wiring Diagram.

FIELD REPAIRS

Field calibrang or repairs to the ETC control must not be aempted.

Sensors and replacement controls are available through Ranco

wholesalers.

SENSOR MOUNTING

For space sensing, mount the sensor where it will be unaected by

heat/cool discharge or radiated heat sources. Spot sensing requires the

sensor to be in good contact with the surface being sensed. The sensor

can be inserted in a bulb well for immersion sensing.