Installation - Emerson ATEX Reference Manual

1

Installation

CAUTION
* Do not attempt to store, install, or operate your
El-O-Matic EL actuator without taking account
of the following;
1.1 Electrical wiring
1 The control circuitry feeding the actuator must not
allow power to be supplied to both "open" and
"close" motor windings at the same instance in
time.
* Example: when power is applied to the "open"
terminal, the "close" terminal must be isolated
from the power supply and vice versa.
* Failure to do so will result in the motor overheat-
ing.
2 If several actuators are controlled from a common
control switch, which has only a D.P.D.T. type
electrical contact on it, then the result can be that
the actuators will run in different directions.
* Example: An open/stop/close switch with only
D.P.D.T. contacts on it controls three actuators.
* When the switch is turned to the open control
position, all three actuators will start to run open. If
any one of the three actuators reaches its open
position before the other two it can receive power
via the common D.P.D.T. contacts and the other
actuators close motor winding, resulting in that
actuator running closed.
3 When several actuators are required to be
controlled in parallel with one 3-position switch,
that switch must have separate contacts for each
actuator being controlled.
4 Use wire with proper gauge and insulation. (follow
standards prescribed by the relevant electrical
code)
5 Actuator chassis must be correctly grounded.
6 Use appropriate conduit or cable glands for
weather proof or explosion proof applications.
7 Follow the wiring diagram to ensure proper
connection of power and control voltage to the
actuator.
8 Make all splices or connections using the correct
pin connector or terminal strip.
9 Always connect anti condensation heater.
DOC.ATX.EL.1 Rev.: -
1.2 Storage
1.2.1 Warehouse Storage
1 Actuators should be stored in a clean, dry
warehouse free from excessive vibration and rapid
temperature change.
2 Actuators should not be stored on any floor
surface.
3 In areas of high humidity the actuator should have
a packet of desiccant placed in the motor
compartment. (this will absorb excessive
moisture)
1.2.2 On Site Storage
1 Actuators should be stored in a clean, dry location
free from excessive vibration and rapid tempera-
ture change.
2 Ensure all actuator covers are in place and
securely fastened.
3 If power is not available, place a packet of
desiccant in the motor compartment. (replace
cover and securely fasten)
4 Replace plastic conduit plugs with appropriate
pipe plugs.
Important
* Failure to follow proper storage guidelines will
void warranty.
2 May '03