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4 - FUNCTION OVERVIEW
4.1 - Intended use
and functions of
the boiler
This gas-fi red condensing boiler,
is designed to be used for central
heating and producing domestic hot
water.
The maximum output heat is always
guaranteed for the production of
domestic hot water since it is given
priority over space heating demands.
Follow the specifi c procedure in
section 12.7 for the adjustment of the
domestic hot water temperature.
Using a PC160 boiler you can
create a system for the production
of instantaneous domestic hot water
and a heating system with heating
elements functioning at temperatures
ranging between 68°F (20°C) and
189°F (87°C).
The boiler can also function directly
with a radiant fl oor panel, see section
5.9.
When connecting the boiler to the
heating system the installer must
consider the head loss of the heating
system to verify that the boiler pump
is adequate. Pump curve is shown in
fi gure 4. The same verifi cation must
be done for the domestic installation,
see fi gure 5.
The PC160 can be connected to
an indirect storage tank for the
production of domestic hot water,
section 7.1.
The PC160 boiler can be connected
to a room thermostat, section 6.3 and
6.4.
An outdoor air temperature sensor
can also be connected to the boiler for
an outdoor reset supply temperature
control for maximum fuel effi ciency
and comfort (see section 6.5). In this
confi guration the room thermostat will
compensate by adjusting the room
temperature. The room temperature
compensation can be of an ON /
OFF type or two-stage. For further
information on the outdoor-air reset,
refer to section 12.10.
The boiler must be connected to
a heating system and a domestic
hot water supply with compatible
specifi cations, performance and
power rating.
Before installation, thoroughly
fl ush the heating and plumbing
systems of any residue
or impurities which might
compromise the smooth running
of the boiler.
This boiler is designed for indoor
installation.
Refer to fi gure 6 for minimum
clearance distances for installation
and future maintenance.
Refer to section 5.2 for minimum
clearance distances from
combustible material.
12
4.2 - Setting of the
boiler
Section 16 details the setting changes
that should be made to best match the
boiler's operation to the needs of each
application.
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