AQUAKOND AKY
CONDENSING BOILER
34
code HC0048.10GB ed.B-1811
AKY
I/O menu - Inputs outputs
From
I/O
menu it is possible to display the values measured
by the sensors.
NTC1
Water delivery temperature
NTC2
Not used (-10 is displayed)
NTC3
Not used
An1
0/10V input - if used
PrH
Water pressure in the circuit
FLH
water flow in the circuit (multiply by 10)
rPu
no. of FAN revolutions
Pu2
circulator output % value (only if electronic)
uSA
Not used
IOn
Measures the ionization current; 0 to 100 for currents
0 to 2 microamperes, 100 above 2 microamperes
Flt Menu (Fault)
It displays the fault event log; use the arrow keys to scroll the
list of error codes and press
ENTER
to display the historical
value of the selected fault.
The first visible value,
rst
, is used to reset the fault event log; this
operation must not be performed by the user but by the service
centre. The reset operation can be carried out by changing the
parameter to 1 and confirming it by pressing and holding
ENTER
for at least 3 seconds.
After the reset,
rst
returns to 0.
The list and the meaning of all faults is contained in FAULT table.
6.9. Exchanger maintenance
Precautions for use
AKY boiler heat exchanger must be used in the following conditions:
•
The fuel used must have a sulphur content according to
the European standard, namely: maximum peak, for short
periods, 150 mg/m
3
, annual average lower than 30 mg/m
3
;
•
Combustion air must not contain chlorine, ammonia or alkalis;
installation near swimming pools or laundries exposes the
boiler to the effects of such agents;
•
Water pH must be within the following limits: 8.2 < pH < 9.5;
if the heating system includes aluminium parts, pH must be
lower than 8.5;
•
Water hardness, TA, must be within 5°F and 15°F;
• During the first start-up, the air in the system must be accurately
removed; subsequently, do not close the automatic vent
valves installed as standard on the boiler;
•
The use of inhibitors to prevent the exchanger steel oxidation
is absolutely necessary. The antifreeze recommended by
APEN, FERNOX ALPHI 11 glycol, serves as inhibitor and
preserves the exchanger from oxidation.
Maintenance
The experience gathered over time about the exchanger by APEN
demonstrates that the annual maintenance of the exchanger
would not be necessary, however the safety regulations require
to perform the following checks on a yearly basis:
• Combustion chamber:
If, during the annual inspection,
some deposits inside the combustion chamber are observed,
it is necessary to aspirate them; if the deposits are strongly
attached, the pipes must be brushed. It is forbidden to use
sharp objects and acid or alkaline substances.
•
Insulation:
The insulation of the combustion chamber must
be inspected on a yearly basis; if signs of deterioration are
detected, it must be compulsorily replaced. In this case the
condensation drain must be checked, because the damage
causes the stagnation of the condensation inside the exchanger.
• Pressure switch activation:
The pressure switch has an
adjustable activation value set to 3 mbar. To make sure
that the pressure switch electrical contact is not stuck on
N.C. position:
- open the pressure switch and move the wheel from 3
mbar to 1 mbar;
- switch the boiler on normally and wait until the burner is
switched off immediately and the "F38" non-volatile safety
lockout is signalled for AKY032-034-050-070 and “F20”
for AKY100.
- move the pressure switch wheel back to 3mbar.
If these conditions do not occur (stuck contact), replace
the pressure switch.
Checks
During annual maintenance, the following components must
be checked:
• Burner Flange gasket
If gaskets are damaged, they must be replaced.
The silicone seal of burner flange (cod. C09162) must be
compulsorily replaced every two years and whenever the
combustion chamber is inspected.
• Burner
No maintenance is required. If the burner surface is damaged,
replace the burner
• Electrodes
Check the position, the absence of alumina deposits and the
integrity of the ceramic. In case of damage, replace the electrode
and the relevant sealing gasket.
• Trap
Clean the plastic trap on a yearly basis.
N
ote: Use APEN original spare parts only.
