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13.10.3 Screw the fitting 20 out of the hot water outlet pipe 6 and remove the water temperature sensor 19.
13.10.4 Install a new water temperature sensor, check on air-tightness, see p. 7.3.7.
13.10.5 Check the appliance's working capacity.
13.11 Replacement of the pipe of cold water supply to the heat exchanger
13.11.1 Remove the casing, see p. 13.1.
13.11.2 Unscrew a captive nut from the fitting of the water unit 17.
13.11.3 Unscrew a captive nut from the fitting of the pipe of the heat exchanger 2 and remove the pipe 5 together with the gaskets.
13.11.4 Install a new pipe with new gaskets.
13.11.5 Check the appliance's operation. Water leakage is unacceptable.
13.12 Replacement of the pipe of hot water outlet from the heat exchanger
13.12.1 Remove the casing, see p. 13.1.
13.12.2 Disconnect the hot water outlet from the heater.
13.12.3 Screw out the fitting 20 from the pipe's hose and remove the water temperature sensor 19, having previously disconnected the sensor's
connector from the electronic control block 4
13.12.4 Unscrew the captive nut of the pipe 6 from the fitting of the pipe of the heat exchanger 2 and remove the pipe 6 together with the gaskets.
13.12.5Install a new pipe with new gaskets.
13.12.6 Install the fitting 20 with the water temperature sensor 19, joint the sensor's connector with the electronic control block 4.
13.12.7 Check the appliance's operation. Water leakage is unacceptable.
13.13 Replacement of thermo relay (draught sensor)
13.13.1Remove the casing, see p. 13.1.
13.13.2 Disconnect the cables from the thermo relay 18.
13.13.3 Remove the carrier 38 with the thermo relay18 with the gas removal device, pushing up the lock on the carrier.
13.13.4 Unscrew two screws fixing the thermo relay 18 to the carrier 38 and remove the thermo relay.
13.13.5 Install a new thermo relay.
13.13.6 Check the appliance's working capacity with the new thermo relay, see p.12.6.
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