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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.
To assist you through the installation and operation of your pressurization / purge system, 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.
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
sERIEs
MoDEl nUMBER
sYstEM Class RatInG
Defines Class rating for Protection
System’s method of use
CI
- Class I Purging system
CII
- Class II Pressurization system
Identifying Your system
HElpFUl HInt
WaRnInG
sYstEM stYlE
Systems are available in three styles, with or without
an explosion proof differential pressure switch, used
to detect loss of “safe” enclosure pressure
LPS -
l
ess
p
ressure
s
witch
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
aREa
ClassIFICatIon
Defines the area
classification for
which the system is
suitable for operation
IMpoRtant notE
appRoVal
MaRKInGs &
DEFInItIons
Identifies the current
third party approvals
for this system
Model 1001a-lps-CI type Y or Z
2 CUBIC FEEt MaXIMUM EnClosURE VolUME
REDUCEs IntERnal aREa ClassIFICatIon as FolloWs:
tYpE Y: Cl. I, DIV. 1, GR. a-D / ZonE 1, GR. IIC to DIV 2/ ZonE 2
tYpE Z: Cl. I, DIV. 2, GR. a-D / ZonE 1, GR. IIC to nonHaZaRDoUs
PURGE CONTROL FOR USE IN HAzARDOUS LOCATIONS. IN ACCORDANCE WITH
THE NATIONAL FIRE PROTECTION ASSOCIATION STANDARD FOR PURGED AND
PRESSURIzED ENCLOSURES FOR ELECTRICAL EqUIPMENT NFPA 496- 1998 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 1001A-IOM.
RSPSupply - 1-888-532-2706 - www.RSPSupply.com
http://www.RSPSupply.com/p-6798-Hoffman-A1001YZUMC2-Purging-Pressurization-System-10-CF.aspx