Emerson OCX 8800 Instruction Manual page 35

Instruction Manual
IM-106-880, Rev 1.0
January 2007
Figure 2-8. Piping Arrangement,
Blowback without Autocalibration
Eductor Air In
Electronics
Housing
Check Valve
Sensor
Housing
CAL Gas In
Reference Air In
Dilution Air In
Instrument Air
*Normally
Open
Solenoid
Valve
Blowback Valve,
Air Operated
*NOTE: During blowback operation, states of
NOTE: Wall mount the air-operated blowback
CAUTION
Pressure regulator with 1/8" inlet port is factory
set for 35 or 45 psig. Regulator with 1/4" inlet port
is factory set for 55 psig. If regulators are not
installed in correct locations, the OCX 8800 will
not work.
Cal Gas Flow Meter
(
7 scfh, 20-30 psig
Recommended
Dilution
Air Flow Meter
0.1 scfh
*Normally
Closed
Pressure Regulator/Filter
Solenoid
35 psig - General Purpose
Valve
45 psig - Hazardous Area
both solenoid valves change.
valve on a suitable mounting plate.
OCX 8800
(
2-Stage
Regulators
Instrument
Air Supply
Pressure
Regulator/Filter
55 psig
2-15