beautypg.com

How to wire the series 920, Figure 13 figure 14, Panel cutout – Watlow Series 920 Microprocessor-Based Ramping Control User Manual

Page 25

background image

(23.37mm)

& - B e z e l

Mounting

Bracket

3.56 ± 0.015

(90.42mm

±0.381

Your Panel

Thickness

0.06 to 0.25

(1.524 to 6.35mm)

3.622 to 3.653

(92.00 to 92.79mm)

Panel

cutout

3.625 x 3.625

(92.08 x 92.08mm)

Nominal

How to Wire the Series 920

3.622 to 3.653

(92.00 to 92.79mm)

I

This section has all the information you need to complete a good wiring job on

the Series 920 and your system. Please read the Safety Information in the

narrow column on the outside of each page. You will find internal circuits on

the left in the following diagrams, and external circuits on the right. In addition,
output options are listed by model number. Refer to the unit sticker on your

control to be sure that you are wiring from the corresponding diagram. We
suggest that you read through the entire section before beginning your hookup.

Then proceed, starting with the sensor inputs, auxiliary outputs, then control

outputs, data communications, and finally, power wiring.

It is very important to enter a system set point in the Series 920 before

applying

power to the load circuitry.

l

In all wiring diagrams, internal circuits are on the left and external

circuits

are on the right.

3.81
(96.77mm)

Figure 13 -
Series 920

Dimensions.

(side view)

Figure 14 -

Series 920

Panel Cutout
Dimensions.

WARNING:

To avoid electric

shock, make all
connections on the

back of the control

before connecting

power to the control.
Also, disconnect

p o w e r b e f o r e

opening the Series
920.

Do not apply

load power to the

output circuits until
you have entered a

system set point

How to Install and Wire, Chapter 4 WATLOW Series 920 User's Manual 25