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Control thermostat
During normal operating conditions, the display of the control thermostat shows the cold
water temperature measured by the probe. In the 50 Hz version, the display shows the
temperature in degrees Celsius, and in the 60 Hz version, it shows it in degrees
Fahrenheit.
Figure 19-2. Press sides
If an alarm sounds: Press the PRG button to silence the alarm. The alarm code will stay
until the cause of the alarm disappears.
Maintenance
Weekly
1
2
3
4
Monthly
1
2
Yearly
1
ENWW
Verify that the water temperature indicated on the control thermostat is approximately
at the setpoint.
Verify the pressure of the pump.
Verify the water level in the tank.
Verify the state of the water filter— if the pressure drop exceeds 0.5 bar (8 psi),
change the filter element.
With the unit disconnected (the main power switch is off), clean the condenser with a
blast of compressed air, from the inside toward the outside.
Clean the housing, internally and externally, eliminating the dust present, especially
on the water pump rack.
Change the filter element, and refill the water circuit with clean water or refrigerant
fluid.
Maintenance 265
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Troubleshooting
