Hatco Imperial Series Installation And Operating Manual page 23

English
Symptom
Relief valve dribbles.
Relief valve opens.
High temperature limit safety switch
trips.
Chattering contactor or low water
cutoff circuit board
Heating element(s) burn out.
Troubleshooting Questions?
If you continue to have problems resolving an issue, please contact the nearest Authorized Hatco Service Agency or Hatco
for assistance. To locate the nearest Service Agency, log onto the Hatco website at www.hatcocorp.com and click on
Find Service Agent, or contact the Hatco Parts and Service Team at:
Telephone: 414-671-6350
e-mail: partsandservice@hatcocorp.com
Form No. EBOOSTER_AAM-1017
Probable Cause
No pressure reducing valve installed or incorrect
valve installed causing pressure build-up inside
booster tank.
Bypass in pressure reducing valve may be
blocked.
Check valve or anti-siphon valve installed in the
feed line.
Unit is overheating.
Contactor may be sticking in closed position not
allowing unit to cycle off.
Temperature limit safety switch is defective.
Thermostat set too high.
Incoming water temperature too high causing
nuisance tripping of high temperature limit switch.
Loose connections or wire connection has
insulation under crimp.
Low voltage.
Probe may be fouled.
Contactor(s) may be bad.
Tank inadvertently drained leaving element(s) in
a dry condition.
Lime buildup in tank causing element(s) to split
and burn out.
TROUBLESHOOTING GUIDE
A pressure reducing valve with high pressure bypass
must be installed in the incoming water line to allow
water to expand back into the feed line.
Clean bypass or replace with new valve with built
in bypass.
Remove check valve or anti-siphon valve to allow
for water expansion or install a back pressure relief
valve (P/N 03.02.039.00) on the incoming water line.
Thermostat may be set too high or is sticking.
Recalibrate or replace the thermostat.
Replace contactor(s).
If booster heater is not overheating, replace High
Limit Safety Switch.
Adjust or
Adjustment" in the MAINTENANCE section.
Incoming water temperature should not be higher
than 71°C (160°F).
Tighten all connections and check crimps
Check control circuit voltage or secondary voltage
with transformer.
Bypass probe by removing wire from low water
cutoff probe and grounding to tank. Clean or replace
probe if chattering stops.
Test contactor coils and replace if needed.
Replace element(s), and make sure tank is full of
water at all times. Check low water cut-off system
for proper operation.
Replace element(s), and clean or delime tanks
periodically. A water softener or blended phosphate
treatment system may be required.
23
Corrective Action
recalibrate, refer to "Thermostat