Yokogawa Integral Oxygen Analyzer ZR202 - Manual (Page 153)

IM 11M13A01-04E 11-11
11. Inspection and Maintenance
11.3 Replacement of Flowmeter for Autocalibration Unit
(1) Remove pipe holding piping fitting
(2) Remove bolts holding flowmeter, and replace it. A white back plate (to make the
float easy to see) is attached. The end of the pin holding down the back plate must
be on the bracket side.
(3) Replace piping, and fix M6 bolts between brackets. *1
*1 : When disassembling and reassembling, mark original positions, and tighten an
extra 5-10˚ when reassembling. After tightening, do a liquid leakage test.
Vertical mounting
Horizontal mounting
C
C
B
B
C' B' A'
A
A
Zr20h_g0.eps
Connect piping pairs A-A Ј , B-B Ј , C-C Ј , D-D Ј
Fixing screw pairs
Flame Arrester
Fitting
Flame Arrester
Fitting
Figure 11.10 Fixing Flowmeter
WARNING
Do not loosen or remove any Flame Arrester of gas inlet/outlet during piping. The
detector modification or parts replacement by other than authorized representative of
Yokogawa Electric Corporation is prohibited and will void KEMA Flameproof
Certification, Factory Mutual Explosionproof Approval and Canadian Standards
Explosionproof Certification.