G-8
Z-038791_EN • Rev A
NESTA CHROME 60-80-100-120
General Description
This wall-hung series of NESTA CHROME boilers
consists of compact, low-emission condensing
appliances with a pre-mix burner, a stainless steel
heat exchanger and a lightweight casing.
The fully radial burner ensures a high modulation ra-
tio, combustion stability and very low NOx emissions.
The unique and proven “fire-tube” heat exchanger
offers a large heat exchange surface to optimise
energy and heating efficiency.
The NESTA CHROME
series is designed for heat-
ing systems and can be used for Domestic Hot
Water production (provided that the system con-
tains an optional external tank).
The appliances are built for natural gas but can
be converted to operate with liquid gas (propane),
using an optional conversion kit. The optional kit
installation must take place before commissioning
and comply with applicable local regulations and
standards.
NESTA CHROME boilers are able to control 3 heat-
ing circuits with mixing functions, through 3 option-
al extension modules. Each extension module re-
quires a power supply and a bus connection. Refer
to
for more
information.
The appliance
is not
provided with a built-in cir-
culating pump. Therefore, the system must be
equipped with at least one pump for standard sys-
tem set up.
NESTA CHROME boilers can be connected in a
cascade configuration, which means that the boil-
ers are connected to the same water circuit and
electronic controller, with one boiler operating as
the master, and the others as “slaves”). Refer to
“Boilers in a Cascade System” on page
for
more information on cascade system possibilities.
Frost Protection
The NESTA CHROME boilers have a built-in an-
ti-frost protection. The pump and the burner are
started as required when the return water temper-
ature drops below 5°C (as measured by the boiler
internal sensor installed on the return circuit).
P
roduct
d
escrIPtIon
The pump and/or burner will turn off when the re-
turn temperature reaches the required setpoint.
The anti-frost protection function only protects the
boiler, not the entire system.
Safety Devices
The NESTA CHROME boilers are equipped with a
series of sensors and switches that provide safety
for your appliance and heating system, such as:
î
Water circuit temperature sensors (supply, re-
turn, system, etc.)
î
Gas pressure switch
î
Flue pressure switch
î
Water pressure sensor
î
Flue temperature sensor
î
Alarm contacts
The NESTA CHROME boilers
are not
provided with
the following mandatory safety equipment that the
installer must place in the system:
î
Expansion tank, suitable for the system size
î
Safety group, composed of a safety valve (pres-
sure rating adapted to the system), an automat-
ic relief valve and a manometer
î
Air relief valve(s), at the high point(s) of the system
Optional equipment
Some optional equipment can be used with the
NESTA CHROME boilers. Please contact your AIC
representative for more information and a list of
available equipment.
To lengthen the life of your boiler and heating sys-
tem, in addition to the recommended water char-
ments to Prevent Scaling and Corrosion” on
the following equipment can be in-
stalled in the heating circui
t:
î
Water filter
î
Dirt separator
î
Low loss header
î
Plate heat exchanger
î
Air separator
See
“Requirements for the Hydraulic Connec
for more information on this
equipment.
