23
Installation Instructions
ENGLISH
Commissioning must be done by profes-
sionally qualified personnel. Unical AG
S.p.A. will not be held liable for damage
to persons, animals or objects due to fail-
ure to comply with the above instruction.
switching boiler on and off
Before commissioning the boiler, check that:
3.10 - COMMIssIONING
does the installation meet the specific standards and regulations in force, both relating to the
gas part as well as the electrical part?
do the combustion air intake and flue gas exhaust take place properly according to
what is defined by the specific rules and regulations in force?
is the fuel supply system sized according to the capacity required by the
boiler? Is it equipped with all safety and control devices required by the standards in force?
is the power supply of the boiler 230V - 50Hz?
has the system been filled with water (approximately 0.8/1 bar pressure on the pressure gauge
with the pump stopped)?
are any system shut-off gate valves open?
does the gas to be used correspond to the boiler calibration gas?: otherwise, perform
the boiler conversion in order to use the gas available (see section: 4.3”);
this operation must be carried out by technical staff qualified in compliance with the standards in force;
is the gas supply valve open?
has the system been checked for gas leaks?
is the outside main switch ON?
is the system safety valve efficient and is it connected to the drains?
has the system been checked for water leaks?
are the ventilation conditions and minimum distances to perform any maintenance
ensured?
have the GAS, HEATING and DOMESTIC HOT WATER pipes been cleaned thoroughly with
products suitable for each circuit?
is a minimum water flow rate always assured to the heat exchanger? (presence of the bypass
between the flow and return pipes or, at least, a radiator always open?)
has a surveillance and protection system against gas leaks been installed? (Optional)
are the system pipes NOT used as the electrical system earthing?
has the system been sized properly bearing in mind the radiator pressure drops?
thermostatic valves, radiator stop valves
has the operator been trained and has the documentation been supplied?
Please tick the operations performed
NOTE!
Further details in the section
‘‘Technical Information’’ on the boiler
page of the www.unicalag.it website