Evoqua Wallace&Tiernan 50-200 Series, Manual

Page: 61 / 111

WT.050.200.001.UA.IM.0814
50-200 EVAPORATOR FOR CHLORINE
50
EVOQUA W3T98237
Table 4.1 - Troubleshooting (Cont'd)
Symptom Probable Cause Corrective Action
Group 2
High Pressure Reading Front
Panel Gauge (Above 140 PSI).
(If Pressure Reaches 400 PSI,
Rupture Disc Will Burst and Relief
System Pressure Alarm Will Be
Activated.)
High pressure inside evaporator
cylinder due to any of the follow-
ing:
(a) Air padded supply pressure
too high.
(b) Valve closed between evapora-
tor inlet and supply with evapora-
tor outlet closed or chlorination
stopped.
(c) Blockage in supply line due
to contaminants with evapora-
tor outlet closed or chlorination
stopped.
(a) Reduce air padding pressure.
(b) Open all valves in supply line.
(c) Open valves, as required, to
avoid trapping liquid in supply
line, evacuate system and shut
down. Follow Long-Term Shut-
down in Section 3. Clean supply
line.
Group 3
Supply Line Pressure Gauge
(Where Provided) is Pinned at
Maximum Reading.
Supply Line Pressure Relief
System Alarm** (Where
Provided) Activated When
Rupture Disc Bursts (at 400 PSI).
Chlorine May Leak From Fittings
as Pressure Increases.
Excessive pressure in supply line
due to any of the following condi-
tions:
(a) Liquid trapped between two
closed valves.
(b) Liquid trapped in evaporator
cylinder by closing valve at supply
and stopping chlorination.
(c) Liquid trapped between a
closed valve and a blockage in the
line.
(a) Open all valves in supply line.
(b) Evacuate system and shut
down. Replace rupture disc.
(c) Open valve, evacuate system
and shut down. Follow Long-term
Shutdown in Section 3. Clean lines.
**Alarms will not activate if customer power fails.