Installation manual

installation manual TWIN 80 EN
(E000129016 - installation manual TWIN 80 EN - 030106v07
36
CHAPTER 5. PERIODICAL MAINTENANCE
High voltage!
The wiring of the pump, the three-way valve, fan
and wiring of the gas control can be under a
voltage of 230 VAC.
After the first year, have a certified installer or maintenance
man inspect the appliance. He can ascertain the maintenance
deadline on the basis of the inspection and circumstances.
5.1. Checking the CO
2
percentage
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
.
5.2. Measuring the load of 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.
5.3. Cleaning 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.
5.4. Ionisation probe
When the unit burns on chimney
sweeper function, the ionisation
current can be read directly on
the display.
Correct ionisation current
Full load: 6 µA DC to 13 µA DC
Low load: 3 µA DC to 13 µA DC
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.
5.5. Water pressure
It is possible to read the water
pressure directly from the
display. To do this, press the "+"
button 5-10 seconds.
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.