Valve Service; Cover; Electronic Control Module - Autotrol Logix 740 Operation Manual

VALVE SERVICE

Cover

Slots

Electronic Control Module

Trip Lever
VALVE SERVICE
The cover provides protection for the controller, wiring, and other
components. This cover will be removed for most service and
maintenance.
When installed, the cover provides NEMA 3 water protection. This protects
from falling water up to 30 degrees from vertical.
To remove cover:
1. Grasp side edges toward rear of the valve.
2. Pull outwards until the slots in the cover clears the projections on the
top plate.
3. Lift up on the rear and pull forward to clear the control module.
To install cover:
1. Position cover to be low in front and under the bottom edge of the
control module.
2. The cover will hook on the bottom of the controller and drop down
over the camshaft.
3. To finish, grasp the side edges and pull outward to clear the
projections on the top plate.
4. Drop down until the cover snaps in place.
The purpose of the electronic control module is to control the regeneration
cycle. The control module has several variations. When replacing the
controller, use the same model or some functions may not work. This is an
electronic controller that is programmable and uses input/output signals.
To remove control module:
1. Disconnect power to the unit.
2. Remove valve cover.
3. Press trip lever to release module from top plate.
4. Pivot the top forward and up.
5. Remove any wire connections. Wire connectors have a locking tab
that must be squeezed before removing.
NOTE:
There is no need to label the wires. The keyed connectors will only plug
back into one site.
45
Rev A