43
Inspections and maintenance
Table of resistance values based on the heating probe (SR) and the heating return probe (SRR) temperature
T°C 0 1 2 3 4 5 6 7 8 9
0 32755 31137 29607 28161 26795 25502 24278 23121 22025 20987
10 20003 19072 18189 17351 16557 15803 15088 14410 13765 13153
20 12571 12019 11493 10994 10519 10067 9636 9227 8837 8466
30 8112 7775 7454 7147 6855 6577 6311 6057 5815 5584
40 5363 5152 4951 4758 4574 4398 4230 4069 3915 3768
50 3627 3491 3362 3238 3119 3006 2897 2792 2692 2596
60 2504 2415 2330 2249 2171 2096 2023 1954 1888 1824
70 1762 1703 1646 1592 1539 1488 1440 1393 1348 1304
80 1263 1222 1183 1146 1110 1075 1042 1010 979 949
90 920 892 865 839 814 790 766 744 722 701
Relation between the temperature (°C) and nom. resistance (Ohm) of the heating probe SR and the heating return probe SRR.
Example: At 25°C, the nominal resistance is 10067 Ohm
4
INSPECTIONS AND
MAINTENANCE
Inspections and maintenance carried out to state of
the art and at regular intervals, as well as the exclusive
use of original spare parts, are of primary importance
for smooth operation and to guarantee long boiler life.
Annual maintenance of the appliance is compulsory, in
accordance with Legislation in force.
Failure to carry out Inspections and Maintenance can
cause material and personal damage.
4.1 INSTRUCTIONS FOR INSPECTION
AND MAINTENANCE
Only original Alpha Innovation spare parts must be used to ensure
a long life for all of the functions of your appliance, and to avoid
changing the conditions of the approved standard product. When a
part needs to be replaced:
• Disconnect the appliance from the mains power supply and make
sure it cannot be reconnected accidentally.
• Shut the gas cut-o valve upstream of the boiler.
• If necessary, and based on the work that needs to be carried out, close
any cut-o valves on the heating ow and return, as well as the cold
water inlet valve.
After completing all maintenance operations, restore the boiler’s
operation.
• Open the heating ow and return, as well as the cold water inlet valve
(if it was previously closed).
• Relieve and, if necessary, restore the pressure in the heating system,
until reaching pressure of 0.8/1.0 bar.
• Open the gas cut-o valve.
• Apply voltage to the boiler.
• Make sure the appliance is water-tight, on the gas side and the water side.
OBLIGATION!
Wear protective gloves.
Scalding hazard!
Be careful during the maintenance operations.
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