Model 1011
Installation and Operation Manual
2
Par
t No
. 51
2083 Dra
wing No
. 1
29-0205a 03/09
Table of Contents
Page 2 System Purpose and Description
Purpose, System description, Important notes
Page 3 Identifying Your System
Defines specific features of the system
Page 3 General Information
System & material specifications, System
accessories, Spare parts, Tools & test equipment
Page 4 Enclosure and Device Design
Design requirements, Adjacent enclosures, Device
ventilation, Temperature limitations
Page 5 Installation Overview
Installation diagram
Page 6 Getting Started
Establishing connection sizes, Determining enclosure
inlet & outlet connection locations
Page 7 System Mounting
LH, RH, TM, BM & WM configurations,
FM & PM configurations
Page 8 Mounting Plate Dimensions
Mounting plate dimension diagrams
Page 9 Hardware Mounting
Optional enclosure protection vent, Warning
nameplates
Page 10 Pneumatic Tubing Requirements
Protective gas supply requirements, Pneumatic
connection requirements
Page 11 Tubing Installation
LH, RH, TM, BM, WM, FM & PM tubing
configurations
Page 12 Tubing Connection Diagrams
LH, RH, TM, BM, WM, FM, & PM configuration
connection points, Pneumatic diagram
Page 13 Electrical Supply Requirements
Wiring requirements, Enclosure power & alarm signal,
Enclosure wiring methods & connections
Page 14 Set-Up Procedure
Class I & Class II set-up
Page 15 Operating Sequence
Class I & Class II operation
Page 16 Troubleshooting Procedures
Troubleshooting chart
Page 17 Warranty and Liability Statement
Warranty notes, General terms, Limitations
Page 18 System Maintenance
Regular maintenance, Long-term maintenance,
Maintenance schedule
Page 19 Systems Identification & Application Information
Purpose and Description
Purpose
Fuchs Enclosure Protection System’s purpose is to
allow the use of general purpose or non-rated 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 enclosures.
Other purposes include heat, moisture and dust contamination
prevention.
Description
Model 1011 is an enclosure pressurization or purging
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 or remove and prevent flammable gas or vapor
accumulations. In Class II areas, the system maintains a “safe”
(1.0") pressure. In Class I areas, the system accomplishes four
air exchanges and maintains a “safe” (0.25") pressure. These
processes reduce the hazardous (classified) area rating within
the enclosure(s), in accordance with the NEC - NFPA 70, Article
500, NFPA 496 and ISA12.4
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 Fuchs
requirements. 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 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.
