Emerson Rosemount 3051 Manual page 29

Model 306 Integral
Manifolds
See "Safety Messages" on page 2-1 for complete warning information.
Model 305 Installation Procedure
To install a Model 305 Integral mainfold to a Model 3051 transmitter
follow the procedure below.
1. Inspect the Teflon (PTFE) sensor module O-rings. If the O-rings
are undamaged, reusing them is recommended. If the O-rings have
nicks, cuts, or other damage, replace them with new O-rings.
IMPORTANT
Do not scratch or deface the O-ring grooves or the surface of the
isolating diaphragm while you remove the O-rings.
2. Install the integral manifold on the sensor module:
a. Align the manifold and sensor module by inserting and
finger-tightening the four 2.25-inch (57 mm) manifold bolts.
b. Tighten the bolts incrementally in a cross-pattern until each of
them reaches the initial torque value (See Table 2-2,
depending upon the bolt material).
c. Tighten the bolts incrementally again until each of them
reaches the final torque value (See Table 2-2, depending upon
the bolt material).
3. If the Teflon (PTFE) sensor module O-rings have been replaced,
the flange bolts should be re-tightened after installation to
compensate for cold flow of the O-rings.
4. Install the drain/vent valves:
a. Apply two complete turns of sealing tape to the valve body
threads (with the open end of the threads pointing toward you,
wrap the tape clockwise beginning at the edge closest to you).
b. Tighten the the valve body into the manifold to 250 in-lb
(28,3 N-m).
c. Orient the opening of the valve so that once the transmitter is
installed the valve opening will point to the ground and away
from personnel when the valve is opened.
d. Tighten the valve bonnet and stem onto the valve body to
70 ± 10 in-lb (7,9 ± 1,1 N-m).
e. Repeat a-d for each drain/vent valve.
NOTE
Perform a zero trim on the transmitter/manifold assembly after you
combine them to eliminate any mounting effects.
The Model 306 integral manifold is for use only with a Model
3051T transmitter.
Model 306 Installation
To install a Model 306 Integral mainfold to a Model 3051 transmitter
follow the procedure below.
Installation
2-23