Coopra Advanced Heating Technologies Installation manual E40C
25
CHAPTER 6. PERIODICAL MAINTENANCE
High voltage !!!
The wiring of the pump, the three-way valve, fan and
wiring of the gas control can be under high voltage of 230
Volt.
After the first year, have a recognised installer or
maintenance man to inspect the boiler. He should be
ascertaining the maintenance deadline on the basis of the
inspection and circumstances.
The condensation water drain must be cleaned each
second year
6.1. Check the CO
2
percentage on full load
The nominal value for natural
gas at full load is 8.8% CO2
(chimney sweeper function).
The boiler does not need to be
cleaned if the measured CO
2
percentage at full load is
within 8.8% CO
2
and 9.4%
CO
2
.
6.2. Check the heat input
A load drop can be the
consequence of a clogged
boiler, flue gas channel, heat
exchanger, or air intake
channel.
Check whether this is the case
by measuring the heat input
on high load (chimney
sweeper function).
If the gas consumption equals (-10%) the nominal heat
input, then the boiler works normally. There is no clogging.
6.3. Clean the condensation water drain
Always clean the trap (siphon).
Clean the drain each second
year.
There is an opening for this
purpose on the top of the
vapour tray. First remove the
rubber sealing plug; rinse the
vapour tray and drain with clean tap water. When no more
impurities are removed, the vapour tray is clean.
6.4. Check the ionisation current
The ionisation current (in µA DC) can be read on the
display directly with the chimney sweeper function.
Full load: Correct ionisation current 3 µA DC to 8 µA DC
Low load: Correct ionisation current 1,5 µA DC to 8 µA DC
With insufficient ionisation
current check the ionisation
probe.
When the ionisation rod is
filthy or has an insulating
layer, simply clean the probe
with fine sandpaper.
6.5. Water pressure
Check the water pressure by pressing the plus (+) button
more than 10 seconds. On the display comes up the
actual water pressure in bar.
The working range is between 0,5 and 3,5 bar.
If needed top up with domestic water, fill and vent.
Advised fill pressure is between 1,5-2,0 bar.
6.6. Service mode
This function, for service
purposes only, has priority
over both the central heating
and hot water regulations.
Maximum flow temperature
with this mode is 85°C
Maximum service time is 10
minutes.
The chimney sweeper function is activated by
simultaneously pressing the plus (+) and the min (-)
buttons of the display for more than 10 seconds.
The actual ionisation current can be seen on the right
hand Segments of the display.
Press the (-) button briefly to go to low load
Press the (+) button briefly to go to high load
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