IMO - 49 EJ/EJX (MODEL G) ELECTRIC ACTUATORS

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2.2 INSTALLATION OF ACCESSORIES 2.4 INSTALLATION OF THE
To remove the cover from the EJ actuators remove the indicator
pointer and the cover hold down screws. On EJX actuators only,
the indicator pointer is part of the cover sub-assembly and is
therefore not removed prior to removing the cover.
When reinstalling the cover care must be taken not to allow the
cover to cock in relation to the base. On all EJ actuators the cover
gasket must be installed between the cover and base flanges before
reinstalling the cover. Tighten one screw partially then another on
the opposite side of the flange, repeating this procedure until all
screws are partially tightened. Repeat this procedure to fully
tighten screws. On the EJX actuators replace the cover and cover
hold down screws. Care must be taken during reassembly that no
particles or dirt are on the mating surface of flanges.
2.3 INSTALLATION OF THE
Internal Heater
HEATER OPTION (LK 5060)
An internal heater with a thermoswitch is available for Neles-
Jamesbury EJ and EJX actuators. These heaters are recommended
for use whenever an actuator is installed in areas where the
temperatures will be below +4O°F (+4°C) in order to prevent
condensation. Power requirement for standard heaters for EJ and
EJX actuators is 100 watts.
I. Mount the thermoswitch to the Basic Board mounting bracket
using the screws, nuts and lock washer provided in the linkage kit.
2. Place the heater blanket around the motor(s).
3. Route one lead wire through the conduit. Cut the second lead
wire approximately 4" or long enough to reach one of the terminals
on the thermoswitch. Assemble one of the connectors and insulator
provided in the linkage kit to it and connect it to the thermoswitch.
4. Assemble a connector and insulator to one end of the cut off
lead wire.
5. Connect the lead wire to the thermoswitch and route it through
the conduit.
6. Apply the label from the linkage kit to the outside of the cover.
FIGURE I
AUXILIARY BOARD
To install the board simply snap the two stand-offs into the holes
provided on the leg of the mounting bracket. Terminal #I (N.O.),
#2 (Common), #3 (N.C.) for the open auxiliary switch. Terminal
#4 (N.O.), #5 (Common), #6 (N.C.) for the close auxiliary switch.
Terminals 7, 8 and 9 are not used.
NELES-JAMESBURY
300-0017-00
AUXILIARY BOARD
FIGURE 2
2.5 INSTALLATION OF THE TWO EXTRA
SPDT LIMIT SWITCH OPTION (EH5089):
The linkage kit contains two pre-wired SPDT limit switch packages,
wiring labels and the auxiliary board. Each limit switch package is
made up of: a limit switch housing, a cam, a prewired 5 AMP limit
switch with a female connector. Once the auxiliary board has been
installed the two SPDT limit switches will plug into the auxiliary
board connectors.
The standard convention for installing limit
switches in N-J products is: the lower switch will
control or indicate the close position, and the upper
switch will control or indicate the open position.
To install a switch package onto the top of the existing motor
control limit switches follow the steps as outlined below:
I. Slide a fully assembled switch package over the cam/gear shaft
and snap the locking legs into the holes on top of the OPEN motor
control switch housing. The lower switch (the switch installed first)
could be used for control or to indicate the close position of the
valve.
2. Repeat the procedure for the next switch. This switch could be
used for control or to indicate when the valve is in the open
position.
3. Attach the lead wire with the connector into the mating
connector on the auxiliary board. The connectors on the auxiliary
board are labeled OPEN and CLOSE.
4. Cam adjustment is made the same as in the CAM ADJUSTMENT
section of this IMO.