10
B. Boiler
Standard boiler electrodes have a MNPT stainless steel bushing and are supplied with a FNPT cross
designed for mounting in the skimmer (surface) blowdown line. Sampling of the boiler’s water can be
achieved using one of two typical plumbing congurations (continuous sampling or timed and/or hold
sampling). For a successful installation, it is critical to observe the recommended distances and pipe sizes
provided in the installation drawings. The probes are temperature compensated for increased accuracy.
For best results, the electrode cross should be mounted in a 1”skimmer blowdown line within 4’ of
the boiler. Smaller line sizes and greater distances may aect the response time and accuracy of the
electrode. A ow-throttling device down stream from the probe (within 24 inches) is required to ensure that
the electrode is exposed to water and not steam. Properly installed and adjusted, this device will prevent
ashing in the electrode chamber.
NOTES:
1. Install a fully ported type valve between the electrode and the boiler. This
allows the electrode to be isolated for removal and cleaning.
2. Aushinglineand1/4turntypeballvalveshouldbeinstalledinthebottom
ofthecrosstoperiodically“ush”sedimentfromtheelectrodechamber.
3. Makesurethealignmentarrowsontheprobeendupparalleltotheowfor
best performance.
WARNINGS:
1. The probe must be fully immersed in the system water to read correctly.
Steamashingwillresultinincorrectreadings.
2. Do not exceed a maximum water temperature of 400°F (204°C)
3. Do not exceed a maximum pressure of 300 psi (20.6 bar)
4. A throttling device must be installed down stream from the elecrode.
Boiler Conductivity Electrodes
BE-4RTD and BE-32
Wiring Note: BE-4RTD probes require a 6 conductor cable from controller to probe, BE-32 probes only
require a 2 conductor cable.
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