Emerson OCX 8800 instruction manual Piping Arrangement, Blowback without Autocalibration

Instruction Manual

IM-106-880, Rev 1.0

January 2007

Figure 2-8. Piping Arrangement, Blowback without Autocalibration

OCX 8800

		CAUTION
	Pressure regulator with 1/8” inlet port is factory
Check Valve	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
Sensor	not work.
Housing
	Cal Gas Flow Meter
	(	7 scfh, 20-30 psig		(
		Recommended
Eductor Air In
CAL Gas In
Reference Air In			2-Stage
		Regulators
Dilution Air In
Instrument Air		Dilution			2
					O	O
						2
		Air Flow Meter			LO	HI	CO
		0.1 scfh

Electronics

Housing

*Normally	*Normally
Open	Closed	Pressure Regulator/Filter
Solenoid	Solenoid	35 psig - General Purpose
Valve	Valve	45 psig - Hazardous Area

Blowback Valve,

Air Operated

*NOTE: During blowback operation, states of both solenoid valves change.

NOTE: Wall mount the air-operated blowback valve on a suitable mounting plate.

Pressure

Regulator/Filter

55 psig

Instrument Air Supply

37390005

2-15