Setra System Model 230 - Manual (Page 4)

4
2.6 Installation Procedures
If the Model 230 is supplied with an optional 3-valve or 5 valve
manifold assembly, refer to Section 2.8 and 2.9. Optional 3-Valve
and 5-Valve Manifold Assembly Procedure, for further installation
procedures. If the Model 230 is not supplied with a Setra 3-valve
or 5-valve manifold, the following installation procedure is rec-
ommended.
For differential pressure measurements at high line pressure (350
psig max.), it is recommended that the pressure sensor be in-
stalled with a valve in each line, plus a shunt valve across the high
and low reference pressure ports as shown.
High Low
Valve C
Valve A Valve B
High Low
Differential
Pressure Sensor
Valve A = High Side
Valve
Valve B = Low Side
Valve
Valve C = Shunt Valve
Top View
Transducer Mounting Holes
(screws provided: mounts to
bottom of 230 transducer)
Side View
1.50
38
Conduit Opening 1.63
41
1.63
41
With transducer
mounted to bracket
0.875
22
f
f
Front View
0.43
11
3.00
762.50
64
0.52
13
0.88
22
1.30
33
Notched for clamp mounting
0.156
.096
f
f in.
mm
2.7 Bleeding the Pressure Ports
3 bleed screws are on the side of the unit (2 for low pressure port, 1 for high pressure port). Install the
transducer in its intended location and pressurize the ports. Back off the first bleed screw mounted
on the flat side of the sensor body (2 turns max.) until liquid begins to flow out. After only bubble-free
liquid flows out, retighten the bleed screw. Repeat same procedure for the second set of bleed screws
located on the round section of the low pressure fitting.
Valve C should be open and Valves A and B closed whenever the system is first being wetted or pressur-
ized. Valves A and B should then be opened slowly to avoid hammering. Valve C can then be closed and
the system is operating.
When the differential pressure sensor is to be removed, Valve C must be opened first, then Valves A and
B can be closed.