Inspections And Maintenance; Inspection And Maintenance Instructions - Alpha ARES Pro 150 Installation And Servicing Instructions

4
INSPECTIONS AND
MAINTENANCE
ATTENTION
before opening the combustion chamber, cool the
fibre.
Inspections and maintenance performed professionally
and according to a regular schedule, as well as the use
of original spare parts, are of the utmost importance
for fault-free operation of the boiler and to guarantee
its long life.
Yearly maintenance of the appliance is mandatory in
compliance with Laws in force.
Failure to perform Inspections and Maintenance can
entail material and personal damage
Table of resistance values based on the heating probe (SR) and the
heating return probe (SRR) temperature.
T°C 0
0 32755 31137
10
20003 19072
20 12571 12019
30 8112 7775
40
5363 5152
50
3627 3491
60 2504 2415
70
1762 1703
80
1263 1222
90 920
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
At 90°C, the nominal resistance is 920 Ohm
1 2 3
29607 28161
18189 17351
11493 10994
7454 7147
4951 4758
3362 3238
2330 2249
1646 1592
1183 1146
892 865 839

Inspections and maintenance

4.1 INSPECTION AND MAINTENANCE
INSTRUCTIONS
To assure long-term functioning of your appliance and to avoid altering
its approved status, only original Unical spare parts must be used.
If a component needs to be replaced:
• Disconnect the appliance from the electrical mains and make sure
that it cannot be reconnected accidentally.
• Close the gas shut-off valve upstream the boiler.
• If needed, and depending on the intervention to be carried out, close
any shut-off valves on the flow and return line of the heating system,
as well as the cold water inlet valve.
Once all maintenance operations are complete resume boiler operation
• Open the heating flow and return pipes, as well as the cold water inlet
valve (if closed previously).
• Vent and, if necessary, restore the heating pressure until reaching a
pressure of 0.8/1.0 bar.
• Open the gas shut-off valve.
• Switch the boiler on
• Make sure the appliance is gas tight and watertight.
4 5 6
26795 25502 24278
16557 15803 15088
10519 10067 9636
6855 6577 6311
4574 4398 4230
3119 3006 2897
2171 2096 2023
1539 1488 1440
1110 1075 1042
814 790 766
37
7 8 9
23121 22025 20987
14410 13765 13153
9227 8837 8466
6057 5815 5584
4069 3915 3768
2792 2692 2596
1954 1888 1824
1393 1348 1304
1010 979 949
744 722 701