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water and gas pipelines by the inlet into the appliance must be closed). When disassembling and assembling
of the water and gas pipelines is effectuated, it is recommended to install new sealings. After replacing the
blocks and details it is necessary to effect the assembling in the reverse order.
Scheme of the appliance in disassembled condition is represented in the Annex I (page 34) on the
schemes 15, 16, 17.
13.1 Casing removal
13.1.1. Screw out two self-threading screws, bonding the casing 1 with the carrier on the body frame, at the
bottom part of the appliance.
13.1.1 Disconnect the cable 24, connecting the display PCB with the electronic control block
13.1.2 Pull the bottom part of the casing towards yourself, move it upwards and remove from the appliance.
13.2 Ignition burner replacement
3.2.1.
Remove the casing, see p. 13.1.
13.2.2. Remove the cables from the plug and the flame sensor of the ignition burner 11.
13.2.3. Screw off the captive nut of the pipe of the flame igniter 13 from the ignition burner 11.
13.2.4. Screw out two fixation screws of the ignition burner connection to the main burner 9.
13.2.5. Remove the ignition burner.
13.2.6. Install a new ignition burner.
13.2.7. Check for air-tightness the joints, subject to disassembling, on the operating appliance by
means of soap solution bubble test (see p. 7.4.6).
13.2.8. Check the new ignition burner's operation on the operating appliance.
13.3 Main burner replacement
13.3.1 Remove the casing, see p. 13.1.
13.3.2 Remove the cables from the plug and the flame sensor of the ignition burner 11.
13.3.3 Screw off the nut of the pipe of the flame igniter 13 from the ignition burner 11.
13.3.4 Screw of two screws and remove the ignition burner 11.
13.3.5 Unscrew the captive nut of the manifold of the burner 32 from the adaptor of the water and
gas unit 3.
13.3.6 Unscrew the burner's fixation screws and remove the burner.
13.3.7 Install a new burner.
13.3.8 Check for air-tightness the joints, subject to disassembling, on the operating appliance by
means of soap solution bubble test (see p. 7.4.6).
13.3.9 Check the new burner's operation on the operating appliance
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