Air/Water Heat Exchanger Operation; Fault Signal - Pfannenberg PWT 6402 230V Betriebsanleitung

GB

Remove unit cover, see

Reconnect the transformer in accordance with the marking on the transformer and the
diagram.

Adjust the voltage marking on the

Mount the unit cover, see
 Before switching on, ensure that the selected upstream fuse is correctly dimensioned for the newly set rated
operating voltage, see
4

Air/water heat exchanger operation


The unit goes directly into operating mode after the mains voltage is applied.

The fan operates permanently.

The solenoid valve regulates the flow of cooling water in accordance with the switch cabinet temperature
setpoint (Tset). The switch cabinet temperature setpoint (Tset) is set via the thermostat.
• Factory setting: 35°C/ 95°F
• Setting range: 8°C / 46.4°F to max. 50°C / 122°F
• Setting range UL compliant: 8°C / 46.4°F to max. 45°C / 113°F
The solenoid valve regulates as follows:

Switch cabinet interior temperature is higher than the set switch cabinet temperature setpoint (Tset).
Solenoid valve: Open
Cooling medium: Flows

Float switch is triggered
Solenoid valve: Locked
Cooling medium: Does not flow

Switch cabinet interior temperature is lower than the set switch cabinet temperature setpoint (Tset).
Solenoid valve: Locked
Cooling medium: Does not flow
Operating conditions
NOTE
Backflowing condensate may damage the electronics in the switch cabinet
Internal temperatures below the dew point or defective switch cabinet seals lead to excessive condensation.
 Frequent checking of the seals helps to prevent heavy condensation build-up.
 Ensure the free drainage of condensate.
• The mains voltage must be within the specified range; see
 A deviation of ± 10 % is permitted.
• The rated frequency must be within ± 3 Hz of the specified value.
• The ambient air temperature must be below 70 °C. For more options, see
Technical data.
 Only use air/water heat exchangers in such a way that the specified cooling capacity can cover the actual
demand.
• Perform the maintenance work in accordance with the maintenance checklist every 12 months, see template
Maintenance checklist template.
4.1

Fault signal

• Two connections are provided for connecting the fault signal. They are marked with the device tag SK, see
Electrical connection.
• The fault signal contact is potential-free.
 Ensure that the contact is loaded as described in the technical data.
Operating Manual PWT 6402 230V / 400V 086100107 © Pfannenberg GmbH
Removing unit cover
circuit diagram
Removing unit cover
type plate.
of the installer.
"in reverse order"
Electrical data.
electrical circuit
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