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Model 1001A Installation and Operation Manual
Identifying Your System
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
classifi cation, and type, as noted below.
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 2, 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 496-1996 4S11
APPROVED BY FM APPROVALS AS ASSOCIATED TYPE Y & Z PRESSURIZATION CONTROL
E Q U I P M E N T F O R U S E I N H A Z A R D O U S L O C AT I O N S . R E D U C E S T H E I N T E R N A L A R E A
OF A CONNECTED ENCLOSURE IN ACCORDANCE WITH DRAWING NUMBER 1001A-IOM.
1001A - LPS - CI - YZ - LH - ##
Series Model Number
System Style
LPS - less pressure switch
WPS - with pressure switch
WPSA - with pressure switch
Area Classification
CI
- Class I Area
CII - Class II Area
System Type
YZ
- Div. 1 to Div. 2, Div. 2 to Nonhazardous
Mounting Configuration
LH - left hand
RH - right hand
TM - top mount
BM - bottom mount
WM - wall mount
FM - frame mount
PM - panel mount
## - Additional factory installed accessories
General Information
System Specifi cations
System dimensions:
Shipping weight ( lbs.):
Operating temp. range:
Supply pressure range:
When using the optional inline fi lter, max. supply pressure is 80 psi
Supply requirements:
Safe pressure (CI/CII):
Safe pressure fl owrate:
System supply fi tting:
Enclosure supply fi tting:
Enclosure reference fi tting:
Switch setting (WPS & WPSA only):
WPS & WPSA pressure switch wiring:
Switch contact ratings:
WPS style:
WPSA style:
*** 120 VAC @ 10 A, 125 VDC @ 50 mA
* With enclosure protection vent - 120 psi maximum
Without enclosure protection vent - 5 psi maximum
** Enclosure integrity determines actual fl ow rate
*** WPSA style switch requires 24 VDC and 240 VAC supply
voltage
left side of enclosure
right side of enclosure
top of enclosure
bottom of enclosure
wall surface
external frame or rack
enclosure surface cutout
(Not available in WPS Style)
See pages 9 & 10
LPS - 5, WPS - 10
-20 °F to +120 °F
* 5 -120 psi max.
Clean air or inert gas
0.25" / 1.0"
** 0.1-3.5 SCFH
1/4" tube fi tting
1/4" tube fi tting
1/4" tube fi tting
0.15"/0.5" ± 0.02"
1/2" FPT
120 VAC, 15 A
In order to comply with the NFPA 496 standard requiring
protection against over pressurization of the protected
enclosure, the installer must install one of the following items in
addition to the enclosure protection system.
a) Install an enclosure protection vent on the protected
enclosure
b) Install a tamper-proof regulator upstream of the enclosure
protection system's system supply inlet to pre-regulate
protective gas supply to 5 psi max.
In addition, for small, tightly sealed enclosures, or to
compensate for a fl uctuating protective gas supply, it may
be necessary to pre-regulate the protective gas supply to a
constant 5 psi regardless of whether an enclosure protection
vent is installed. This will reduce the amount of "drifting" that
can normally occur when maintaining a "safe" pressure inside a
protected enclosure. The pre-regulation can be accomplished
by installing the TR-10G tamper-proof regulator accessories or
equivalent.
Material Specifi cations
Regulator body:
Regulator handle:
Enclosure pressure gauge:
Tube fi ttings:
Tubing:
System nameplates:
Fastener hardware:
Mounting plate:
EXP pressure switch body:
Enclosure warning nameplate:
Recommended Spare Parts
Qty Description
1
Enclosure pressure indicator-CI
1
Enclosure pressure indicator-CII
1
Enclosure pressure control regulator
1
Installation & operation manual
1
Group C - D pressure switch-CI
1
Group A - D pressure switch-CI
1
Group E - G pressure switch-CII
1
Enclosure warning nameplate-CI
1
Enclosure warning nameplate-CII
Please call and reference the above part number for current
spare parts pricing. Immediate pricing is available to all
confi rmed customers.
Installation Tools & Testing Equipment
1/2" chuck drill
Complete set of drill bits
1/2" conduit knockout punch or 0.875" hole saw
Complete set of tubing, conduit bending, instrument fi tting and
electrical craftsman hand tools
0 - 250 scfh fl owmeter (connected upstream of the protection
system to determine air consumption and fl ow during set-up
procedure)
Zinc w/ enamel fi nish
Polycarbonate
Aluminum w/ enamel fi nish
316 SS forged body
316 SS 1/4" .035 welded
®
Silkscreened Lexan
& SS
Aluminum & stainless steel
316 14 ga #3 brush SS
Anodized cast alum.
Silkscreened SS
Part # (supercedes)
510023 (001000)
513235 (001027)
513315 (002000)
129-0197
510044 (001080)
510045 (001085)
513242 (001082)
513008 (EWN-1)
513009 (EWN-2)
3
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