PENBERTHY
MODEL MGS-314 SERIES AND MGS-314D SERIES LEVEL CONTROL SWITCH
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
Before installation, these instructions must be read carefully and understood.
© 2019 Emerson. All Rights Reserved.
VCIOM-03387-EN 20/06
PRODUCT WARRANTY
Emerson warrants its Penberthy products
as designed and manufactured to be free of
defects in material and workmanship for a
period of one year after the date of installation
or eighteen months after date of manufacture,
whichever is earliest. Emerson will, at its
option, replace or repair any products which
fail during the warranty period due to defective
material or workmanship.
Prior to submitting any claim for warranty
service, the owner must submit proof of
purchase to Emerson and obtain written
authorization to return the product. Thereafter,
the product shall be returned to Emerson, with
freight prepaid.
This warranty shall not apply if the product has
been disassembled, tampered with, repaired
or altered outside of the Emerson factory, or
if it has been subjected to misuse, neglect
or accident.
Emerson's responsibility hereunder is
limited to repairing or replacing the product
at its expense. Emerson shall not be liable
for loss, damage, or expenses directly or
indirectly related to the installation or use
of its products, or from any other cause or
for consequential damages. It is expressly
understood that Emerson is not responsible
for damage or injury caused to other products,
building, property or persons, by reason of the
installation or use of its products.
1 INTRODUCTION
The instructions in this manual pertain to
the Penberthy Model MGS-314 or MGS-314D
magnetic level meter switch.
The Model MGS-314/314D Series magnetic
level meter switch is designed to detect the
passage of the float in a MULTIVIEW™ magnetic
liquid level meter, at a specific location. The
switch consists of a snap-action switch and
a magnetic actuation assembly encased
in a watertight (Type 4) or explosion-proof
(Type 7) enclosure.
This is Emerson's sole warranty and in lieu of
all other warranties, expressed or implied which
are hereby excluded, including in particular all
warranties of merchantability or fitness for a
particular purpose.
This document and the warranty contained
herein may not be modified and no other
warranty, expressed or implied, shall be made
by or on behalf of Emerson unless modified or
made in writing and signed by the company's
president or a vice president.
TABLE OF CONTENTS
Product warranty ................................................ 1
1 Introduction ............................................. 1
2 Specifications/Approvals ......................... 2
2.1 Enclosure ..................................................... 2
2.2 Switch ........................................................... 2
2.3 Approvals ...................................................... 2
3 Theory of Operation ................................. 2
4 Installation ............................................... 2
4.1 Unpacking..................................................... 2
4.2 Mounting the switch .................................... 3
4.3 Wiring connection ........................................ 3
5 Set-up ...................................................... 4
5.1 Initial test ...................................................... 4
6 Pump-Control Set-up .............................. 4
6.1 Interval relay wiring ..................................... 4
7 Troubleshooting ...................................... 4
7.1 Introduction .................................................. 4
7.2 Switch test .................................................... 4
7.3 Actuation test ............................................... 4
8 Telephone Assistance .............................. 5
9 Model KFA5-SR2-Ex2.W.IR
Interval Relay .......................................... 9
9.1 Operation ...................................................... 9
9.2 Typical applications ..................................... 9
9.3 Connection diagram .................................... 9
Tables and Figures
Figure 1 - MGS-314 Series ................................ 3
Figure 2 - MGS-314D Series ............................. 3
Figure 3 - Control drawing CSA approved
explosion-proof for
MGS-314/314D (7E741-009) ............. 5
Figure 4 - Control drawing CSA approved
intrinsically safe for
MGS-314/314D (7E742-009) ............. 6
Figure 5 - Control drawing ATEX/IECEx
certified explosion-proof for
MGS-314/314D (7E741-010) ............. 7
Figure 6 - Control drawing ATEX/IECEx
certified intrinsically safe for
MGS-314/314D (7E742-010) ............. 8
Figure 7 - Application 1-Pump-up diagram ..... 9
Figure 8 - Application 2-
Pump-down diagram ........................ 9
Figure 9 - Connection diagram ......................... 9
