Pepperl+Fuchs 1001B Series, 1001B-LPS-CII Y, 1001B-LPS-CII Z Installation & Operation Manual

CLASS II APPLICATIONS

ISC * 877-602-0010 * www.iscenclosurecooling.com

50 Cubic Feet Maximum

MODEL 1001B

TYPE Y OR Z

PRESSURIZATION SYSTEM

INSTALLATION & OPERATION MANUAL

LPS Style

(Less Pressure Switch)

WPS Style

(With Pressure Switch)

Table of Contents

ISC * 877-602-0010 * www.iscenclosurecooling.com

Page 2 System Purpose and Description

Purpose, System Description, Important Notes

Page 3 Identifying Your System

Defines specific features of the system

Page 4 General Information

System & Material Specifications, System
Accessories, Spare Parts, Tools & Test
Equipment, Maintenance Procedures

Page 5 Enclosure and Device Design

Design Requirements, Adjacent Enclosures,
Device Ventilation, Temperature Limitations

Page 6 Installation Overview

Installation Diagram

Page 7 Getting Started

Establishing Connection Sizes, Determining
Enclosure Inlet & Outlet Connection Locations

Page 8 System Mounting

LH, RH, TM, BM & WM Configurations,
FM & PM Configurations

Page 9 Hardware Mounting

Optional Enclosure Protection Vent, Warning
Nameplates

Page 10 Mounting Plate Dimensions

Mounting Plate Dimension Diagrams

Page 11 Mounting Plate Dimensions (cont.)

Mounting Plate Dimension Diagrams

Page 12 Pneumatic Tubing Requirements

Protective Gas Supply Requirements,
Pneumatic Connection Requirements

Page 13 Tubing Installation

LH, RH, TM, BM, WM, FM & PM Tubing
Configurations

Page 14 Tubing Connection Diagrams

LH, RH, TM, BM, WM, FM, & PM Configuration
Connection Points, Pneumatic Diagram

Page 15 Electrical Supply Requirements

Wiring Requirements, Enclosure Power & Alarm
Signal, Enclosure Wiring Methods & Connections

Page 16 Conduit Installation

Electrical & WPS Style Conduit and Connection
Parts

Page 17 Set-Up & Operating Procedures

Class II Set-up and Operation

Page 18 Trouble - Shooting Procedures

Trouble-shooting Chart

Page 19 Warranty and Liability Statement

Warranty Notes, General Terms, Limitations

Page 20 Systems Identification & Application

Information

Purpose

Pepperl+Fuchs' Bebco EPS System’s purpose is to allow
the use of general purpose or nonrated electrical or
electronic devices, with exception to devices which
produce excessive heat, utilize combustible gas, or
expose arcing contacts to the hazardous atmosphere,
in Type 4 or 12 enclosures in the place of explosion
proof Type 7 or 9 enclosures. Other purposes include

heat, moisture and dust contamination prevention.

Description

Model 1001B is an enclosure pressurization system that
operates on a supply of compressed instrument air or inert
gas. It regulates and monitors pressure within sealed
(protected) enclosures to prevent combustible dust
accumulation. In Class II areas, the system maintains a
“safe” (1.0") pressure. This process reduces the hazardous
(classified) area rating within the enclosure(s), in
accordance with the NEC - NFPA 70, Article 500, NFPA 496
and ISA 12.4

Important Notes

One (1) permanent file copy and one (1) operations copy of
this Manual must be studied and retained by the operator of
this System. User’s Agents are responsible for transferring
this Manual to the user, prior to start-up.

The contents of this manual have been arranged to allow the
use of this product as a stand-alone device on equipment and
enclosures supplied by the user or its agents. The Manual’s
parameters encompass a combination of both National Fire
Protection Association (NFPA) requirements and
Pepperl+Fuchs requirements. Pepperl+Fuchs therefore
acknowledges the use of NFPA 496 as a guideline, that we
have enhanced certain NFPA requirements and that additional
information has been compiled to complete this document.
The Manual is intended as a complete guide and must be
considered, unless specifically stated otherwise, that all
directives contained herein are Pepperl+Fuchs requirements
for safe, practical and efficient use of this product.

This System is not intended for use to protect enclosures or
devices which contain ignitable concentrations of gases or
vapors. This exclusion generally applies to process or
product analyzing systems equipment.

All specifications are subject to change without notice.

2

Pepperl+Fuchs®Inc. • 1600 Enterprise Parkway • Twinsburg, Ohio 44087-2245 • www.bebcoeps.com

BEBCO EPS

Telephone [phone] • FAX [phone] • E-Mail: [e-mail]

Identifying Your System

ISC * 877-602-0010 * www.iscenclosurecooling.com

This Enclosure Protection System is offered in various styles. For proper installation and operation, examine the System
Model Number Nameplate to identify the System Style, Area Classification, and Type, as noted below.

SYSTEM STYLE

SYSTEM CLASS RATING

Defines Class rating for Protection

System’s method of use

CII - Class II Pressurization system

SERIES

MODEL NUMBER

Systems are available in two styles, with
or without an explosion proof differential

pressure switch, used to detect loss of

“safe” enclosure pressure

LPS - Less Pressure Switch

WPS - With Pressure Switch

MAXIMUM

TOTAL

ENCLOSURE

VOLUME

Defines total

protected

enclosure(s)

volume capacity for

this particular
system. Total

enclosure(s)

volume must be

calculated without

regard for

consumed volume

To assist you through the installation and operation of your pressurization / purge system, Pepperl+Fuchs, Inc. has
provided the following information boxes throughout this manual. This information is intended to clarify certain
differences between the model styles and configurations and to warn the user / installer of potential dangers of electrical
shock or enclosure over pressurization.

Model 1001B-LPS-CII Type Y or Z

50 CUBIC FEET MAXIMUM ENCLOSURE VOLUME

REDUCES INTERNAL AREA CLASSIFICATION AS FOLLOWS:

TYPE Y: CL. II, DIV. 1, GR. F & G TO CL. II, DIV. 2

TYPE Z: CL. II, DIV. 2, GR. F & G TO NONHAZARDOUS

PURGE CONTROL FOR USE IN HAZARDOUS LOCATIONS. IN ACCORDANCE WITH THE NATIONAL FIRE
PROTECTIONASSOCIATION STANDARD FOR PURGED AND PRESSURIZED ENCLOSURES FOR ELECTRICAL
EQUIPMENT NFPA 496-2003 7L93

APPROVED BY FACTORY MUTUAL AS ASSOCIATED TYPE Y & Z PRESSURIZATION CONTROL
EQUIPMENT FOR USE IN HAZARDOUS LOCATIONS. REDUCES THE INTERNAL AREA
OF A CONNECTED ENCLOSURE IN ACCORDANCE WITH DRAWING NUMBER 129-0201.

AREA

CLASSIFICATION

Defines the area
classification for

which the system is

suitable for operation

APPROVAL
MARKINGS &
DEFINITIONS

Identifies the current
third party approvals

for this system

SYSTEM TYPE

Type Z

Reduces the internal

enclosure area

Division rating from

Division 2 to

nonhazardous

Type Y

Reduces the internal

enclosure area

Division rating from

Division 1 to

Division 2

HELPFUL HINT

Pepperl+Fuchs®Inc. • 1600 Enterprise Parkway • Twinsburg, Ohio 44087-2245 • www.bebcoeps.com

BEBCO EPS

Telephone [phone] • FAX [phone] • E-Mail: [e-mail]

IMPORTANT NOTE

WARNING

3

General Information

ISC * 877-602-0010 * www.iscenclosurecooling.com

System Specifications

System Dimensions: See Pages 10 & 11
Shipping Weight ( lbs.): LPS - 7, WPS - 12
Operating Temperature Range: -20° F - 120° F
Supply Pressure Range: * 5 -120 PSI max.
Supply Requirements: Clean Air or Inert Gas
Safe Pressure Setpoint: 1.0"
Safe Pressure Flowrate: ** 0.1-3.5 SCFH/Cubic Ft.
System Supply Fitting: 3/8" Tube Fitting
Enclosure Supply Fitting: 3/8" Tube Fitting
Enclosure Reference Fitting: 1/4" Tube Fitting
Switch Setting (Decr,) 0.5"
Switch Conduit Port Size: 1/2" FPT
Switch Contact Rating: 120 VAC, 15 Amps

* With EPV-3 Vent - 120 PSI max. to 5 PSI minimum

Systems installed without EPV-3 must be equipped
with redundant regulator set to 5 PSI maximum

** Enclosure integrity determines actual flow rate

+ .02"

Material Specifications

Regulator Body: Zinc w/ Enamel Finish
Regulator Handle: Polycarbonate
Enclosure Pressure Gauge: Alum. w/ Enamel Finish
Tube Fittings: 316 SS Forged Body
Tubing: 316 SS 1/4" .035 Welded
System Nameplates: Silkscreened Lexan
Fastener Hardware: Aluminum & Stainless Steel
Mounting Plate: 316 14 Ga #3 Brush SS
EXP Pressure Switch Body: Anodized Cast Alum.
Enclosure Warning Nameplate: Silkscreened SS

Lexan® is a registered trademark of the General Electric Corporation

®

& SS

Model 1001B System Accessories

Recommended Spare Parts

Qty Description Part # (supercedes)

1 Enclosure Pressure Indicator-CII 513235 (001027)
1 Enclosure Pressure Control Regulator 513236 (002050)
1 Installation & Operation Manual 129-0201

EXP Encl Pressure Loss Alarm Switch-CII

1
1 Enclosure Warning Nameplate-CII 513009 (EWN-2)

Please call and reference the above part number for
current spare parts pricing. Immediate pricing is available
to all confirmed customers.

513242 (001082)

Installation Tools & Testing Equipment

1/2" chuck drill
Complete set of drill bits

1.25" conduit knockout punch or 1.75" hole saw
Complete set of tubing, conduit bending, instrument fitting
and electrical craftsman hand tools
0 - 250 scfh flowmeter (connected upstream of the Protection
System to determine air consumption and flow during set-up

procedure)

Maintenance Procedures

Regular Maintenance Procedure

Drain the Protection System Filter frequently (if equipped
with a Model ILFK In-Line Filter Kit) and clean System with
non-solvent cleaning agents only, such as soap and water.

Long Term Maintenance Procedures

Calibrate the enclosure pressure indicator to 0 inches by
venting the purge pressure reference port and the protected
enclosure to atmosphere and adjusting the calibration screw
in the lower center portion of the indicator’s face.

Optional Enclosure Protection Vents

EPV-3-SA-00 Straight w/ Spark Arrestor
EPV-3-SA-90 Rt Angle w/ Spark Arrestor

Additional Items

SMK-1, -4 or -6 System Mounting Kit
EPSK-2 Class II, Explosion Proof Switch Kit
GPSK-2 Class II, General Purpose Switch Kit
RAH Div. 1 Remote Alarm Horn
RAB-1 Div. 1 Remote Alarm Beacon
RAB-2 Div. 2 Remote Alarm Beacon
LCK L Fitting Conduit Kit
TCK T Fitting Conduit Kit

4

BEBCO EPS

Pepperl+Fuchs®Inc. • 1600 Enterprise Parkway • Twinsburg, Ohio 44087-2245 • www.bebcoeps.com
Telephone [phone] • FAX [phone] • E-Mail: [e-mail]

If vent is utilized, fully open the enclosure pressure control
regulator, to blow out any deposits around the tip of the
regulator and to ensure that the enclosure protection vent is
operating properly, then carefully readjust system according
to the set-up and operating procedures on page 17. Replace
or tighten stem packing nut as required to prohibit stem
packing leakage.

Carefully disassemble the enclosure protection vent by
loosening the two bottom hex nuts that hold the unit together.

(DO NOT REMOVE CAP NUTS ON TOP OF VENT BODY)

Carefully clean the flapper valve and vent body seats with
warm soap and water, being careful not to extend the vent
valve beyond its normal opening point, and being careful not
to exert any stress on the valve hinge.

Examine the entire Protection System and the protected
enclosure(s), and replace any defective parts during routine
shutdown of the protected enclosure(s). Parts are available
from Pepperl+Fuchs on immediate notice as required.

Enclosure & Device Design

ISC * 877-602-0010 * www.iscenclosurecooling.com

Enclosure Design Requirements

1. All windows must be shatterproof and sized as small as
possible.

2. All NFPA 496 required markings must be placed on or
near all enclosure doors and covers.

3. The enclosure must withstand an internal pressure of ten
(10) inches of water without sustaining permanent
deformation and resist all corrosive elements in the
surrounding atmosphere.

4. All lightweight objects in the enclosure, such as paper or
insulation, must be firmly secured.

5. The enclosure should be constructed from materials
such as metal or anti-static polycarbonate to meet or
exceed Type 4 or 12 performance requirements, but
does not require third party approval.

6. The installation of obstructions or other barriers which
block or impede the flow of protective gas must be
avoided.

7. The creation of air pockets or other areas which trap
flammable gases within the enclosure or devices must
be avoided.

8. The enclosure should be located in an area where
impact hazards are minimal.

9. If the enclosure is nonmetallic and contains equipment
which utilizes or switches power loads greater than 2500
VA, it must be constructed from substantially
noncombustible materials, such as materials designed
to meet or exceed ANSI/UL94 ratings of 94 V-0 or 94 5V.

Total Volume Calculation

1. The total volume of all pressurized enclosures, devices
and wireways must be considered.

2. All enclosure, device and wireway volumes must be
calculated without consideration of internally consumed
space.

Device Ventilation

1. Enclosed devices within the protected enclosure which
do not exceed 1.22 cubic inches of free volume do not
require ventilation to the protected enclosure.

2. If the free volume of an internal device exceeds 1.22
cubic inches it must be protected by one of the following
means:

a) ventilated on the top and bottom sides with one (1)

square inch of opening for each four hundred (400)
cubic inches of volume within the internal protected
enclosure, at a minimum diameter of one (1) quarter
inch;

b) purged in series with the protected enclosure or be

purged separately; or

c) protected by other means; e.g. explosion proof

enclosures, hermetically sealed devices or intrinsic
safe circuits.

Temperature Limitations

1. The enclosure must have no surface area which exceeds
80 percent of the flammable or ignitable substance’s
auto-ignition temperature.

Adjacent Enclosures

1. Adjacent enclosures must be protected by one of the
following means:

a) purged or pressurized in series with the protected

enclosure;

b) purged or pressurized separately; or

c) protected by other means; e.g. explosion proof

enclosures, hermetically sealed devices or intrinsic
safe circuits.

2. Adjacent purged or pressurized enclosures must be
designed to meet all construction requirements above.

2. Internal devices which exceed this temperature must be
protected by one of the following manners.

a) The device is enclosed in a chamber that is cUL or

FM listed as a hermetically sealed device which
prohibits the entrance of flammable or ignitable
substance, and maintains a surface temperature
below temperature limits.

b) It can be proven by testing that the devices will not

ignite the substance involved.

c) The device is purged in a separate enclosure that

bears an ETW (Enclosure Temperature Warning
Nameplate). Devices may only be accessed after
power has been removed and the device has been
allowed to cool to safe temperature, or the area is
positively known to be nonhazardous.

Pepperl+Fuchs®Inc. • 1600 Enterprise Parkway • Twinsburg, Ohio 44087-2245 • www.bebcoeps.com

BEBCO EPS

Telephone [phone] • FAX [phone] • E-Mail: [e-mail]

5

Installation Overview

ISC * 877-602-0010 * www.iscenclosurecooling.com

Typical Left Hand Configuration Installation Diagram

Model 1002-WPS-LH Shown

ENCLOSURE

PROTECTION

VENT

PROTECTED
ENCLOSURE

ENCLOSURE

SUPPLY TUBING

SYSTEM

MOUNTING

BOLT

PROTECTIVE
GAS SUPPLY

SERVICE

VALVE

SUPPLY TUBING

ENCLOSURE

PROTECTION

SYSTEM

SYSTEM

SUPPLY FITTING

SYSTEM

ENCLOSURE
REFERENCE

TUBING

ENCLOSURE

CONNECTION

FITTINGS

ENCLOSURE

WARNING

NAMEPLATE

6

ELECTRICAL ALARM WIRING

CONDUIT & SEAL

Pepperl+Fuchs®Inc. • 1600 Enterprise Parkway • Twinsburg, Ohio 44087-2245 • www.bebcoeps.com

BEBCO EPS

Telephone [phone] • FAX [phone] • E-Mail: [e-mail]