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Alpha Intec 50CS
3.5 PUMP ANTI-SEIZE FUNCTION.
The boiler has a function that starts the pump at
least once every 24 hours for the duration of 30
seconds in order to reduce the risk of the pump
becoming blocked due to prolonged inactivity.
3.6 THREE-WAY VALVE ANTI-SEIZE
FUNCTION.
Both in 'domestic hot water' and 'central heating'
modes the boiler has a function that starts the
three-way valve 24 hours after it was last in
operation, running it for a full cycle so as to
reduce the risk of the valve becoming blocked
due to prolonged inactivity.
3.7 RAdIATOR ANTI-FREEZE
FUNCTION.
If the system return water is below 4°C, the boiler
starts up until reaching 42°C.
3.8 P.C.B. PERIOdIC SELF-CHECK.
During operation in central heating mode
or with the boiler in stand-by mode, this
function activates every 18 hours after the last
boiler check/power supply. When operating in
domestic hot water mode the self-check starts
within 10 minutes after the end of the last hot
water draw-off, for approximately 10 seconds.
Note:
During self-check, the boiler remains off.
3.9 AUTOMATIC VENT FUNCTION.
In the case of new central heating systems it
is very important that the system is vented
correctly. To activate the 'F8' function (Section
2.4), press buttons 'B and C' at the same time
(Fig. 2-1) for 5 seconds with boiler in stand-by.
The operation consists of cyclic operation of the
pump (100 sec ON, 20 sec OFF) and the 3-way
valve (120 sec domestic hot water, 120 sec central
heating). The operation ends after 18 hours or
by switching the boiler on using the ignition
button
.
3.10 YEARLY APPLIANCE CHECK ANd
MAINTENANCE.
The following checks and maintenance must be
performed at least once a year.
- The Benchmark Service Record must be
completed in order to preserve the boiler
warranty.
- Clean the flue side of the heat exchanger.
- Clean the main burner.
- Check correct ignition and operation.
- Check correct calibration of the burner in
domestic hot water and central heating modes.
- Check correct operation of the controls, in
particular:
- the operation of main electrical switch on the
boiler.
- system control thermostat operation.
- domestic hot water control thermostat
operation.
- Check the gas circuit for soundness.
- Check the operation of the flame sensing
control:
- check that the relative intervention time is
less than 10 seconds.
- Visually check for water leaks or oxidation
from/on connections and traces of condensate
residues inside the sealed chamber.
- Check, by means of the condensate drain cap,
that there are no residues of material blocking
the flow of condensate.
- Check contents of the condensate drain trap.
- Visually check that the water safety drain valve
is not blocked.
- Check that, after discharging system pressure
and bringing it to zero (read on boiler pressure
gauge), the expansion vessel factory-set
pressure is 1.0 bar (primary CH vessel).
- Check that the domestic hot water expansion
vessel load is at a pressure between 3 and 3.5
bar.
- Check that the system static pressure (after
refilling the system and when it is cold) is
between 1 and 1.2 bar.
- Visually check that the safety and control
devices have not been tampered with and/or
shorted, in particular:
- temperature safety thermostat.
- system pressure switch.
- Check the condition and integrity of the
electrical system and in particular:
- electrical power cables must be inside the
sleeving.
- there must be no traces of blackening or
burning.
Note:
When carrying out maintenance on the
boiler, also check the central heating system to
ensure it is functioning correctly and free of leaks.
Summary of Contents for InTec 50CS
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