Yokogawa EJX115A - Manual (Page 24)

<4. Installation>
4-2
IM 01C25K01-01E
F0402.ai
Vertical pipe mounting
(Process connector upside)
Vertical pipe mounting
(Process connector downside)
Transmitter
mounting bolt
Transmitter
mounting bolt
Mounting bracket
Mounting bracket
U-bolt nut
U-bolt nut
U-bolt
U-bolt
50 mm(2-inch) pipe
50 mm(2-inch) pipe
Figure 4.2 Transmitter Mounting
(Vertical Impulse Piping Type)
4.3 Changing the manifold
assembly
The transmitter is shipped with the manifold
assembly specified at the time of ordering. To
change the manifold assembly, the drain (vent) plug
must be repositioned.
To reposition a drain (vent) plug, use a wrench to
slowly and gently unscrew it. Then, remove and
remount it on the opposite side. Wrap sealing tape
around the drain (vent) plug threads (*1 in the figure
below), and apply a lubricant to the threads of the
drain (vent) screw(s) (*2 below). To tighten the drain
(vent) plugs, apply a torque of 34 to 39 N·m {3.5 to 4
kgf·m}. Manifold bolts are to be tightened uniformly
to a torque of 39 to 49 N·m {4 to 5 kgf·m}.
F0403.ai
*1
*2
Drain/vent plug
Note: For a horizontal impulse
piping type, moving the
Manifold Assembly from
the front side to the
back cannot be made.
Vertical impulse piping type
Horizontal impulse piping type
Bolt
Process connector
gasket
Manifold
Figure 4.3 Changing Manifold Assembly
4.4 Swapping the High/Low-
pressure Side Connection
This procedure can be applied only to a transmitter
with a vertical impulse piping type.
The procedure below can be used to turn the
pressure detector assembly 180°. Perform
this operation in a maintenance shop with the
necessary tools laid out and ready for use, and then
install the transmitter in the field after making the
change.
1) Use an Allen wrench (JIS B4648, nominal 2.5
mm) to remove the two setscrews at the joint
between the pressure-detector section and
transmitter section.
2) Leaving the transmitter section in position,
rotate the pressure-detector section 180°.