Troubleshooting Guide - Hatco Imperial S Series Installation And Operating Manual

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IMPORTANT! Read Before Using the

Troubleshooting Guide

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.
WARNING
ELECTRIC SHOCK HAzARD:
• Turn OFF power at fused disconnect switch/circuit
breaker and allow unit to cool before performing any
cleaning, adjustments, or maintenance.
• This unit must be serviced by qualified personnel only.
Service by unqualified personnel may lead to electric
shock or burn.
Before proceeding with the "Troubleshooting Guide" to diagnose
an issue, check aLL of the following outside factors.
Water Temperature
• Check the temperature of the water feeding into the
booster tank. It must be 110° to 140°F (43° to 60°C),
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.
• If the wash tank of the dish machine is filled through the
booster heater, this will use up all of the 180°F (82°C) water
in storage. Sufficient time must be allowed to reheat the
water in storage before starting the dish machine.
• Primary water heater temperature should not exceed 160°F
(71°C).
WARNING
This unit must be serviced by qualified personnel only.
Service by unqualified personnel may lead to electric
shock or burn.
Symptom
Water reaches 180°F (82°C) but
does not last through the entire
dish machine operation.
Form No. EBOOSTERm-0613
Probable Cause
Low incoming water temperature.
Incoming water temperature drops.
Flow pressure is too high.
Booster heater may be undersized.
Incorrect voltage.
TROUBLESHOOTING GUIDE
Water Pressure
• Water pressure at the inlet to the booster heater must be
adequate for proper operation of the rinse cycle of the dish
machine, not to exceed 20 psi (138 kPa). Check with dish
machine manufacture for specific details.
• If incoming water exceeds 20 psi (138 kPa), a pressure
reducing valve must be installed.
Electrical Connections
• Booster heater voltage must be correct for voltage
available. Check the specification label on the booster
heater for full information.
• The breakers or fuses mUST be properly sized.
Plumbing Connections
• The temperature/pressure relief valve must be properly
installed and be supplied by Hatco.
• 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 (P/N 03.02.039.00) set at 125
psi (862 kPa) on the incoming line between the pressure
reducing valve and the inlet to the booster heater.
Discharge must be to open site drain.
If the unit does not function properly after performing these
checks, continue to the "Troubleshooting Guide" in this section.
ELECTRIC SHOCK HAzARD: Turn OFF power at fused
disconnect switch/circuit breaker and allow unit to cool
before performing
maintenance.
Incoming water temperature must be adequate
for booster size. Increase incoming water
temperature.
Primary water supply is not adequate to
provide correct temperature in sufficient
quantities. Increase supply of primary hot
water.
Higher pressure uses an excessive quantity of
hot water. adjust flow pressure to 20 psi
(138 kPa).
Booster heater must be properly sized for
incoming
requirements of the dish machine.
Check voltage on heater serial plate and make
sure supplied voltage matches. a 240V booster
heater operating on 208V reduces wattage to
76% efficiency.
27
WARNING
any cleaning, adjustments,
Corrective Action
water temperature and
or
rinse