TROUBLESHOOTING
WARNING
To avoid any injury or damage, the booster heater must only be serviced by qualified personnel.
WARNING
To avoid any injury or damage to the booster heater turn the power OFF at the disconnect switch/circuit breaker and allow to cool before performing any maintenance.
GENERAL
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 pages
1.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 in sufficient quantity to hold its temperature throughout the dishwashing operation.
2.If incoming water exceeds 20 psi (138 kPa), 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 180°F (82°C) 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 nameplate 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 20 psi (138 kPa). 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 part number 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. (See Figure 13.)
9.Primary water heater temperature should not exceed 160°F (71°C).
Form No. | 30 |
