Installation guide

26
Before commencing setting, when the
boiler is switched off (plug of electrical
power cord is removed from socket), it is
necessary to:
- detach the covering (metal) plug (A)
- relax the closing screw of the
measurement point (2) of outfl ow gas
pressure and slide on the tube of the U-
manometer (screw not removed)
Maximum output
- The boiler is put into operation and left to
work during hot water consumption at
maximum output. The course of
measurement should not be interrupted
by switching off the boiler e.g. by reaching
the maximum hot water temperature or
heating water temperature etc.;
- By turning the plastic screw (B) the gas
pressure is set to maximum output – by
turning it clockwise gas pressure is
increased:
• 125 mm of water column for natural gas
• 270 mm of water column for propane
Reduced output
Measurement is performed upon soft start
after the boiler is switched on in heating
mode (this state persists for max. 100
seconds)
- using the screw (C) the left limit position
is set to minimum output (anticlockwise)
- the dial (D) on the automatic device is
used to set:
• 55 mm of water column for natural gas
• 130 mm of water column for propane
After completing setting switch the boiler
off, remove the U-manometer tube and
slightly tighten the closing screw at the
measurement point. Screw the metal
cover plug back on. Put the boiler into
operation and perform a tightness test
of the measurement points on the gas
armature.
First heating
The fi rst heating is a short, sharp operation
of the boiler after its initial connection to
the heating system.
Set the boiler control elements (operational
controls, room control unit) so as to
attain the highest possible heating water
temperature in the system and at the
same time the smallest possible number
of shutdowns of the boiler. Maintain the
entire system (boiler and heating system)
in these conditions until it is stabilised
(i.e. the temperature becomes constant
also on the body at the furthest distance
from the boiler), and for at least one hour
more.
The boiler is shut down. Record the
pressure value (on the boiler). Once
more carefully de-aerate the system and
subsequently pressurise to the recorded
value.
Finally the system is allowed to cool.
During the drop in temperature check that
there is not also simultaneously a marked
pressure drop. In the case of such a
pressure drop check for leakages, rectify
them and repeat the fi rst heating.