MEDC PH1 User Manual

Technical Manual for the Alarm Pull Station – PH1

Please note that every care has been taken to ensure the accuracy of our technical manual. We do not, however, accept
responsibility for damage, loss or expense resulting from any error or omission. We reserve the right to make alterations
in line with technical advances and industry standards.

© Cooper MEDC 2013 08/13

08/13 © Cooper MEDC 2013

1.0 INTRODUCTION

These manual alarm pull stations have been designed for use in hazardous locations and harsh environmental
conditions. The GRP enclosures are suitable for use offshore or onshore where light weight combined with a high
level of corrosion resistance is required

2.0 GENERAL SAFETY MESSAGES AND WARNINGS

All instructions and safety messages in this manual must be followed to allow safe installation of the device. The
device must only be installed and maintained by correctly trained site personnel/installers.

i. To reduce the risk of ignition of hazardous atmospheres and shock, do not apply power to the device until

installation has been completed and the device is fully sealed and secured.

ii. To reduce the risk of ignition of hazardous atmospheres and shock, keep device tightly closed when the

circuit is energised.

iii. Before removing the cover for installation or maintenance, ensure that the power to the device is isolated.

iv. Following installation, test the device to ensure correct operation.

v. Following installation ensure a copy of this manual is made available to all operating personnel

vi. When installing the device, requirements for selection, installation and operation should be referred to

e.g. IEE Wiring Regulations and the ‘National Electrical Code’ in North America. Additional national
and/or local requirements may also apply.

vii. Cable termination should be in accordance with specification applying to the required application.

MEDC recommends that all cables and cores should be correctly identified. Please refer to the wiring
diagram in this manual (or separate diagram provided with the unit).

viii. Ensure that only the correct listed or certified cable glands are used and that the assembly is shrouded

and correctly earthed.

ix. Ensure that only the correct listed or certified stopping plugs are used to blank off unused gland entry

points and that the NEMA/IP rating of the unit is maintained.

x. MEDC recommend the use of a sealing compound such as HYLOMAR PL32 on the threads of all glands

and stopping plugs in order to maintain the IP rating of the unit.

xi. The internal earth terminal, where fitted, must be used for the equipment grounding and the external

terminal, if available, is for a supplementary bonding connection where local codes or authorities permit
or require such a connection.

xii. When installing the device, MEDC recommends the use of stainless steel fasteners. Ensure that all nuts,

bolts and fixings are secure.

xiii. Blanking plugs are not to be used with the cable entries.

xiv. When fitting or removing cable entry glands, the cable entry inserts must be held with a suitable tool to

prevent movement.

xv. To support the requirements of UL38 Clause 6.1.2, when multiple call points are installed in a single

zone the two 18AWG wires required for each of the common incoming and outgoing terminals must be
crimped together in a single boot lace ferrule.

xvi. Units supplied in any colour other than red are for ancillary use only and shall not be used for fire

alarm use

3.0 INSTALLATION

The pull station is mounted via the 4 off Ø 6.5mm (Ø 1/4”) fixing holes in the base of the enclosure. The unit has
been designed and certified to operate at any attitude

The fixing holes have been designed to accept an M6 screw or bolt.

Cable Termination

Unscrew the 4 off M6 screws (5.0mm A/F hexagon key) holding the cover assembly to the base. The cover screws
are retained in the cover assembly for ease of installation. Gently lift the cover assembly away from the b ase of
the enclosure to gain access to the interior.

Once termination is complete, carefully lower the cover assembly back onto the base, avoiding da mage to the
mating surfaces. Ensure the o-ring is correctly seated in its groove during re-assembly. Evenly tighten the 4 off
cover screws (5.0mm A/F hexagon key). The required torque on each explosion-proof enclosure cover screw
shall not be less than 40 in-lbs (4.5Nm). Ensure the required gap (0.038mm / 0.0015” Max.) is maintained
between the cover and the base.

© Cooper MEDC 2013 08/13

4.0 STANDARD WIRING OPTIONS

See below for various wiring options for the PH1. Note: This is not an exhaustive list and the units may be wired
to suit customer’s requirements. If a different wiring layout has been specified when ordering the unit, please see
separate wiring diagram supplied with the unit.
EOL resistors should only be fitted to the last unit in a system

Wiring - Switch only

Wiring – c/w EOL resistor

R1 – EOL Resistor

Wiring – c/w series or series & EOL resistors

R1 – Series resistor, R2 – EOL res istor (if fitted)

08/13 © Cooper MEDC 2013

Wiring – c/w series zener diode

Standard wiring – c/w series diode and EOL resistor

R2 – EOL res istor

Standard wiring – c/w series resistor and EOL diode

R1 – Series resistor

© Cooper MEDC 2013 08/13

5.0 OPERATION

The unit is operated by lifting the spring loaded f ap on the front of the unit, then pulling down the handle
underneath. The pull handle will rotate downwards through 90 degrees. The pull handle will remain latched in
the operated position until manually reset. The lift flap can be lowered back to its orig inal position until the unit
needs to be reset.

The reset the unit, first raise the lift flap away from the pull handle. The key (provided with the unit) is inserted into
the two holes located underneath the pull handle in the front face until resistance is felt. Depress the key further to
release the pull handle which can be returned to its orig inal position. Finally, lower the lift flap b ack to its original
position.
Note: When resetting the unit, please ensure the key is depressed centrally with even pressure on each leg of the
reset key.

The operating voltage of the unit is stated on the certification label

GENERAL ARRANGEMENT

6.0 MAINT ENANCE

During the working life of the unit, it should require little or no maintenance. GRP will resist attack by most acids,
alkalis and chemicals and is as resistant to concentrated acids and alkalis as most metal products.
However, if abnormal or unusual environmental conditions occur due to plant da mage or accident etc., then visual
inspection is recommended.
If the unit requires cleaning, then only clean exterior with a damp cloth to avoid electro-static charge build up.
If a unit fault should occur, then the unit can be rep aired by MEDC. All parts of the unit are replaceable.
If you acquired a significant quantity of units, then it is recommended that spares are also made available.
Please discuss your requirements with the Technical Sales Engineers at MEDC.

l

08/13 © Cooper MEDC 2013

7.0 CERTIFICATION/APPROVALS

Please refer to marking on the unit for specific approval details

UL Ordinary locations units:

UL listed for use in USA (USL) and Canada (CSL) ordinary locations

Suitable for indoor or outdoor use.

UL Haz ardous Locations (Class I, Div. 1) units:

UL listed for use in USA (USL) and Canada (CSL) Hazardous locations
Class I, Div. 1 & 2 groups B, C & D
Class II, Div. 1 & 2, groups E, F & G
Class III

UL Hazardous Locations (Class I, Div. 2) units:

UL listed for use in USA (USL) and Canada (CSL) Hazardous locations
Class I, Zone 1, AEx d IIC, Ex d IIC
Class I, Div. 2 groups A, B, C & D
Class II, Div. 2, Groups F & G
Class III

UL Standards:
UL38, UL50, UL50E, UL1203, ULC528, UL60079-0, UL60079-1, ANSI/ISA 12.12.01

Certified temperature

-50°C to +70°C

-58°F to +158°F

© Cooper MEDC 2013 08/13

Cooper MEDC Ltd, Unit B, Sutton Parkway, Oddicroft Lane, Sutton in Ashfield NG17 5FB
Tel: [phone] Fax: [phone]
Email: [e-mail] [e-mail]
Web: www.coopermedc.com

08/13 © Cooper MEDC 2013

MEDC Stock No:

TM238-ISS.A