Model 1011
Installation and Operation Manual
10
Par
t No
. 51
2083 Dra
wing No
. 1
29-0205a 03/09
Pneumatic Tubing Requirements
Protective Gas Supply Requirements
The protective gas supply to the protection system must be a
clean, instrument quality compressed air or nitrogen and must
contain no more than trace amounts of flammable gas, vapor
or dust.
The protective gas supply compressor intake must originate
in a nonhazardous location. Suction duct passing through a
hazardous location and the protection system tubing and piping
must be fabricated from noncombustible materials suitable for
prevailing hazards and environmental conditions.
The protective gas supply must originate from a dedicated
instrument quality compressed air header (1/2" pipe or larger),
no farther than twenty (20) feet from the protection system.
Local compressors and gas cylinders should not be used
before consulting with Fuchs.
The protective gas supply to the protection system must be
equipped with a tamper-proof regulator set at 5 psi maximum.
Exception:
If the protected enclosure(s) is equipped with an
Enclosure Protection Vent, the protective gas supply to the
protection system must not exceed 120 psi maximum, 5 psi
minimum. (See page 3, "System Specifications" for additional
information concerning protective gas supply requirements.)
SC-4
NC-4
EBC-4
EFC-4
EPC-10
SYSTEM SUPPLY FITTINGS
ENCLOSURE SUPPLY & REFERENCE FITTINGS
MULTIPLE ENCLOSURE CONNECTION FITTING
Pneumatic Connection Requirements
ALL FITTINGS MAY BE CUSTOMER OR FACTORY FURNISHED
1. For system supply, one (1) SC-4 1/4" male straight
connector or one (1) NC-4 1/4" male elbow connector or
equivalent fitting per system.
NOTE: Above fitting is required only if protection system
is furnished with an optional in-line filter kit (model ILFK)
accessory.
One (1) similar fitting which will connect the inert gas supply
tubing to the inert gas supply header connection point and
one (1) lot of 1/4" O.D., .035" wall thickness, welded or
seamless stainless steel tubing.
2. For enclosure supply, one (1) EFC-4 1/4" flush connector,
or one (1) EBC-4 1/4" feed-through connector or equivalent
fitting per system.
3. For enclosure reference, one (1) EFC-4 1/4" flush connector,
or one (1) EBC-4 1/4" feed-through connector or equivalent
fitting per system.
4. One (1) lot of 1/4" O.D., .035" wall thickness, welded or
seamless stainless steel tubing.
5. For multiple enclosure connections, two (2) EPC-10 1/2"
pipe mounting hubs or equivalent and 1/2" 150# rated pipe
couplings & unions per interconnection.
One (1) lot 150# rating 1/2" galvanized or aluminum pipe
and fittings, fully reamed and unrestricted.
PM Pneumatic Connection Requirements
In addition to item numbers 1, 4, and 5 above, the following
fittings are required for all PM configurations.
1. For system supply on PM configurations, one (1) additional
EBC-4 or equivalent 1/4" through bulkhead fitting per
system is required.
2. For atmospheric reference, one (1) PRB-4 or equivalent 1/4"
female bulkhead fitting and stainless steel sintered element
is required.
PRB-4
SYSTEM ATMOSPHERIC REFERENCE FITTING
