Water Level Detection In A Boiler Drum - Emerson Mobrey Hydratect 2462 Reference Manual

Reference Manual
24625020, Rev AA
Figure 1-2. High Water Level Detection in Drain Pot
A. Superheat steam line.
B. Drain pot.
C. Isolation valve.
1.5.2

Water level detection in a boiler drum

A Hydratect 2462 system for detecting high and low water levels in a boiler drum is shown
in Figure 1-3 on page
Trip signals are validated by connecting both Hydratect channels using a "two-out-of-two"
configuration in a Hydratect 2462 Electronics Control Unit. For example, the high-level trip
signal occurs only when water is detected at both the high and the high-high water level
electrodes. Further information is in
The illustrated Hydratect 2462 system uses a sidearm manifold for detecting intermediate
water levels between high and low. Connection information for the manifold pipework is in
Figure 1-4 on page
Note the following points:
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Introduction
F
E
C
D
6.
6.
The connecting pipework must be sloped as indicated in
This is done to ensure a flow of condensate through the manifold.
The isolating valves, when opened, should allow unrestricted flow through the
manifold. Globe valves are highly recommended. These valves should be installed
with the handle spindle horizontal.
The connecting pipework must be insulated, as shown by the dashed lines marked
in Figure 1-4 on page
B
C
D. Drain line.
E. High alarm signal.
F. In-line manifold with two electrodes (channels 1 and 2).
Section 3: Installing the Electronics Control
6.
Introduction
March 2017
A
Unit.
Figure 1-4 on page 6.
5