49
8.8.
Three-way valve motor (fig. 30)
• Access behind the front casing, as described in 7.2
• Remove the three-way valve motor by unplugging the electrical connection and removing the holding clip upwards
• Remove the motor pulling it forwards
• Reassemble with a new motor in reverse order
8.9.
DHW temperature probe (fig. 30)
• The DHW temperature probe is positioned on the hot water outlet pipe, just above the three way valve
• Disconnect the two electric connections and unclip the probe from the pipe
• Reassemble with a new probe in reverse order
8.10.
Heat exchanger flue probe (fig. 28)
Note: if the heat exchanger flue probe generates an E90 or E91 error code, check carefully the integrity of the heat exchanger itself, and if
necessary, replace it. If the error code is E89, proceed with the probe replacement.
• Access behind the front casing, as described in 7.2
• Disconnect the wires from the probe and remove it
• Fit in a new probe and reassemble in reverse order
8.11.
DHW flow switch (fig. 30)
• Remove the front cover and access behind the control panel, as described in 7.2
• Isolate the boiler from the mains water supply, and open any hot water tap, in order to drain the boiler
• Disconnect the wires from the flow switch
• Undo the union nut at the top of the flow switch
• Remove the fixing clip at the bottom of the flow switch and then remove the switch itself
• Fit the new switch and reassemble in reverse order, opening the mains water supply
8.12.
Primary heat exchanger
• Drain the boiler heating circuit, connecting the drain point to a suitable container and opening it
• Access the room sealed chamber and remove the burner/panel/fan assembly as described in 7.2
• Disconnect the condensate drain pipe
• Disconnect the heat exchanger flue sensor as described in 8.11
• Disconnect the flow and return pipes from the left side of the heat exchanger, removing the holding clips and pulling the pipes downwards
• Also disconnect the flow pipe from the three way valve and remove it
• Unscrew the four screws from the two brackets holding the heat exchanger
• Slightly widening the two brackets, slide the exchanger downwards and forwards, in order to disconnect it from the flue connection and to
withdraw it from the boiler
• Replace with a new exchanger and carefully reassemble in reverse order
• Refill, pressurise the system and carefully vent air from the exchanger, opening the manual air vent on the top of the exchanger itself
8.13.
Double flow temperature probe and return probe (fig. 28)
• Access the room sealed chamber as described in 7.2
• Disconnect the wiring and unclip the probe from the water flow or return pipe
• Replace with a new probe and reassemble
8.14.
Automatic air vent (fig. 30)
• Access behind the control panel as described in 7.2 and drain the boiler heating circuit
• Extract the retaining clip and lift the vent out of the pump housing
• Insert the new air vent and lock it with the clip
• Reassemble in reverse order
• Refill and pressurize the system
8.15.
Primary pressure switch (fig. 30)
• Access behind the control panel as described in 7.2 and drain the boiler heating circuit
• Disconnect the wiring from the pressure switch
• Remove the holding clip and lift the switch upwards to extract it
• Replace with a new switch and reassemble in reverse order
• Refill and pressurize the system
Содержание Antea 24kW Range
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