3
PENBERTHY
MODEL MGS-314L SERIES LEVEL CONTROL SWITCH
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
4.2 Mounting the switch
Due to shipping vibration, is possible the switch
will not be in the 'normal' position for proper
operation. If this occurs, simply cycle the
float past the switch once. This will initialize it
automatically.
1. Measure the distance from the top of the
indicating scale, on the magnetic level
gauge, to the top of the communicating
chamber. Record this distance.
2. Loosen the clamps holding the indicating
scale to the communicating chamber.
3. Open the mounting band supplied with the
Model MGS-314L Series.
4. Place the Model MGS-314L Series on the
communicating chamber. The cut out in
the switch housing should contact the
communicating chamber. Place the mounting
band around the chamber and under the
indicator housing. For optimum performance
the cut out should be parallel and the switch
housing perpendicular to the communicating
chamber.
5. Loosely tighten the mounting band. Move
the Model MGS-314L Series either up or
down to the desired position and tighten the
band.
6. The switch must be mounted within the
indication range for the magnetic gauge.
The mounting band for the switch should
be a minimum of 1 inch (25 mm) inside the
indication range. This will insure sufficient
float movement to operate the switch.
7. If more than one switch is used on a
single magnetic gauge, the minimum
recommended distance between mounting
bands is 2 inches (51 mm).
8. Adjust the position of the indicating scale so
that the distance from the tip of the scale
to the top of the communicating chamber
is the same as in step 1. Tighten the
clamps holding the indicating scale to the
communicating chamber.
4.3 Wiring connection
1. If you are using conduit for the switch wiring
use conduit seal with a drain or a drip-loop
to prevent condensate from entering the
housing. Condensate can cause electrical
shorts. (The switch housing has a ½" NPT-M
connection for the wiring conduit)
Note:
attach conduit prior to mounting
switch on communicating chamber to relieve
mounting stresses.
2. We recommend using aluminum or austenitic
stainless steel conduit and nipple, to the
conduit opening of the switch housing.
This will give you an accessible point to
terminate the control wires. DO NOT USE any
ferromagnetic material such as: carbon steel,
duplex, 400 Series stainless steel or cast iron.
4 INSTALLATION
4.1 Unpacking
Upon receiving the Model MGS-314L Series
magnetic level gauge switch, check all
components carefully for damage incurred in
shipping. If damage is evident or suspected,
do not attempt installation. Notify the carrier
immediately and request a damage inspection.
Check each item against the packing list.
