Evoqua Wallace&Tiernan 50-200 Series, Manual

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50-200 EVAPORATOR FOR CHLORINE
WT.050.200.001.UA.IM.0814
49
EVOQUA W3T98237
4.15 Troubleshooting Guide
NOTE: All symptoms in any given group occur concurrently unless other wise
noted.
Table 4.1 - Troubleshooting
Symptom Probable Cause Corrective Action
Group 1
Liquid Chlorine in Chlorinator
Rotameter.
Chlorinator Plastic Material Dete-
rioration.
Chlorinator Erratic.
Liquid chlorine discharged from
evaporator outlet as a result of
any of the following conditions:
(a) Demand on evaporator ex-
ceeds design capacity.
(b) Supply pressure too high (see
Probable Cause in Group 2).
-OR-
Inadequate heat transfer as a
result of contaminant build-up on
inside of cylinder and/or deposit
build-up on outside of cylinder.
-OR-
Low water bath temperature with
low temperature switch failing to
close GPRV* (or VR-CU), sound
alarm, and activate panel light.
(See Probable Cause in Group 5.)
(c) By-pass open around GPRV* (if
provided)
(d) GPRV* (if provided) leaking
pressure across valve.
(a) Reduce chlorinator gas with-
drawl rate.
(b) Reduce cylinder pressure. See
Corrective Action for High Pres-
sure in Group 2.
Close supply valve, evacuate
system, and shut down. See
Long-Term Shutdown in Section
3. Clean cylinder interior and ex-
terior. See "In-Place" Cleaning of
Evaporator Cylinder in Section 4.
See Corrective Action for Symp-
tom Group 5.
(c) Close by-pass
(d) Close supply valve, evacuate
system and shut down. See Long-
Term Shutdown in Section 3. See
GPRV* instruction book for valve
repair.
*GPRV - Gas Pressure Reducing Valve; VR-CU - Vacuum Regulator-Check Unit