Troubleshooting - Hatco Imperial Series Installation And Operating Manual

TROUBLESHOOTING GUIDE
General
WARNING
ELECTRIC SHOCK HAzARD:
• Turn power OFF at disconnect switch/circuit breaker
and allow unit to cool before performing any
maintenance or cleaning.
• This unit must be serviced by qualified personnel only.
Service by unqualified personnel may lead to electric
shock or burn.
IMPORTANT! many times when a booster heater does not
appear to be functioning properly, the fault is not with the
booster heater itself but with factors outside the heater. Before
proceeding with the troubleshooting chart on the following page,
perform the following steps first.
1. Check the temperature of the water feeding into the
booster tank. It must be 43° to 60°C (110° to 140°F)
depending on the heating capability of the unit. The inlet
water supply must be of sufficient quantity to hold its
temperature throughout the dishwashing operation.
2. If incoming water exceeds 138 kPa (20 psi), a pressure
reducing valve must be installed.
3. If the wash tank of the dishwasher is filled through the
booster heater, this will use up all of the 82°C (180°F) water
in storage. Sufficient time must be allowed to reheat the
water in storage before starting the dishwasher.
4. Booster heater voltage must be correct for voltage
available. Check the SPECIFaTION label on the booster
heater for full information.
5. Water pressure at the inlet to the booster heater must be
adequate for proper operation of the rinse cycle of the
dishwasher, not to exceed 138 kPa (20 psi). Check with
dishwasher manufacture for specific details.
6. The breakers or fuses mUST be properly sized.
7. Be sure that the temperature/pressure relief valve is one
supplied by Hatco and properly installed.
8. a check valve should not be installed ahead of the booster.
NOTE: If a check valve is installed and cannot be removed
install a back pressure relief valve, Hatco P/N
03.02.039.00, set at 862 kPa (125 psi) on the incoming
line between the pressure reducing valve and the inlet
to the booster heater. Discharge must be to open site
drain.
9. Primary water heater temperature should not exceed 71°C
(160°F).
28
English
Form No. EBOOSTERm_CN-0911