Watlow EZ-ZONE ST Manual do Utilizador descarregar pdf (Página 17)

Wa tlow EZ-ZONE

ST • 15 • Chapter 2 Install and Wire

1. Pinch the release levers on the top and

bottom of the control module and lift the

bottom edge forward to detach the unit.

2. With a Phillips screwdriver, remove

the four nearest screws that were un-

der the module.

3. Lift the controller body, exposing

the solid-state relay.

4. Using a Phillips screwdriver, remove the

two screws connecting the solid-state relay

to the heat sink.

Replacing the Solid-State Relay

1. Using a Phillips screwdriver, replace

the two screws connecting the solid-

state relay to the heat sink.

2. Place the controller body over the

solid-state relay and, using a Phillips

screwdriver, replace the four screws

securing it.

3. Snap the control module in place,

bottom edge first.

Note:

For controller models without a contactor (ST _ _-A _ _ _-_ _ __),

the solid-state relay must be mounted with the larger power

terminals on the top and the smaller control terminals on the bot-

tom.

Replacing the Solid-State Relay

on a Controller without a Contactor (ST _ _-A _ _ _-_ _ _ _)

Note:

Factory calibration is done using control and base modules as

matched pairs. Due to this fact, current detection (if turned on) may

not read accurately if a control module is placed into another base

module.

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Watlow EZ-ZONE ST Manual do Utilizador Página 17