Installation manual

Coopra Advanced Heating Technologies Installation manual 40 EN
26
CHAPTER 7. MAINTENANCE
High voltage! ! !
The wiring of the pump, the three-way valve, fan and
wiring of the gas block can be under a voltage of 230
VAC.
Serial connection
A
PC
or
Lapt
op
can
be
con
nect
ed for an extensive diagnosis and display of the functionality.
The necessary cable (which contains an electrical isolation) and
software can be ordered as options.
7.1. ANNUAL MAINTENANCE
After the first year, have a recognised installer or maintenance
man inspect the unit. He can ascertain the maintenance
deadline on the basis of the inspection and circumstances. A
certified (SCIOS) installer should inspect the unit annually.
7.1.1. Checking the CO
2
percentage on full load
The nominal value for natural gas
at full load is 8.8% CO2.
The unit 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
.
7.1.2. Measuring the load on the unit
A load drop can be the consequence of a clogged flue gas
channel or a clogged air intake channel. Check whether this is
the case by measuring the load on the unit. First set the central
heating capacity "P" to 100% in the menu. Let on the unit burn
on chimney sweeper function at full load. Measure the gas
consumption. If the ascertained
deviation in load is no more than
15% of the nominal value, the flue
gases can be sufficiently
exhausted and there is no
clogging. At the end of the check,
reset the central heating capacity
"P" in the menu to its customer-
specific value.
7.1.3. Checking the condensation water drain
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.
Also clean the trap.
7.1.4. Ionisation probe
The ionisation probe is a part that wears. An insulating layer can
be formed in the flame at high
temperature. This layer can be
removed with fine sandpaper. Do
not clean the ionisation probe
with coarse sandpaper, because
grooves in the surface of the pin
will accelerate the formation of
the layer.
Full load:
Correct ionisation current between 6 µA DC to 13 µA DC.
Low load:
Correct ionisation current between 3µA DC to 13 µA DC.
Unplug the plug of the ionisation probe (low voltage). Remove
the two screws from the ionisation clamp. Remove the ionisation
probe from the cover and check the ionisation probe. The
ionisation probe must be straight and clean (a slight deposit is
normal), Clean or replace the ionisation probe.
7.1.5. Water pressure
Check the water pressure; top up and de-aerate as necessary.
Press the ‘plus’ button in for at least 5 seconds to see the actual
water pressure in bar on the display.
Press briefly on the ‘min’ button to return to operational mode.