Installation manual

installation manual TWIN 80 EN
21
CHAPTER 3. COMMISSIONING
3.1. Filling
If the unit is not yet filled with water, the display shows a flashing
‘P’ and the water pressure in bar.
The operational water pressure of
the appliance is between 0.5 bar
en 3.0 bar.
A good system is with a pressure
of about 1.5 to 2 bar.
Proceed as follows:
1). Fully open all radiator taps.
2). Connect the water supply tube
to the filling and draining device in
the central heating system.
3). Fill the water supply tube with water. Let the air in the water
supply tube escape; because you want to fill the system with
water instead air.
4). Connect the fully filled water supply tube to the water tap.
5). Open both water taps with caution and fill the system.
6). When the water pressure is sufficient (> 1.3 bar), the flashing
‘P’ disappears from the display.
7). Close, after filling, the filling tap and remove the water supply
tube.
3.2. Reading the water pressure
To read the water pressure
directly from the display press
and hold the “+” button 5
seconds.
The unit switches back to normal
operation either automatically
after about 5 minutes or by
pressing "-" button.
3.3. Venting
After filling, the heating installation must be vented.
Follow also instructions from the installer of the system for the
venting of possible other elements of the heating installation,
such as under floor heating.
Proceed as follows:
1). Take care all pumps are OFF.
Otherwise the pump(s) may move the air
through the system constantly.
2). During the venting process you also
may put the appliance main switch in the
supply cable OFF.
3). Open the air bleed cocks of the radiators one at a time. Use
an air bleed key for this. As soon as water comes out of the air
bleed cock, shut the cock off again.
After venting of the system, the appliance and all pumps
must be connected to the mains and be switched ON.
3.4. Chimney sweeper function
The chimney sweeper function has priority over the central
heating and HWS regulation.
The chimney sweeper function is
activated by simultaneously
pressing the "+ and the – buttons"
of the display in for longer than 5
seconds.
The ionisation current can be
read in microamperes in the two right segments.
The capacity that is immediately released is the maximum
central heating capacity.
Press the "- button" to go to
low load.
Press the "+" button to
switch back to full load.