Description And Choice Of Unit; Models Available; Versions Available; 2.2. 1 Standard Equipment - AERMEC NSB Serie Manual Tecnico

Air-cooled liquid chillers with axial fans for ou-
tdoor installation (protection class IP24).
They are fi tted with one or more chiller circui-
ts. The evaporators are the pipe bundle type
with dry expansion. The entire series can have
up to three twoscrew compressors. The new
NSB A series is distinguished by high effi cien-
cy (EER) values thanks in part to the use
of refrigerant R134a, too. that makes it pos-
sible to obtain effi ciencies that are conside-
rably higher than the equivalent products that
operate using R407C. This result is also the
fruit of a careful study and scaling of all the
internal components to get the best out of the
characteristics of the R134a. refrigerant gas.
Particular care has also been paid to the sca-
ling of the exchangers, compressors and venti-
lators. All the units are tested and delivered
complete with refrigerant load and oil, (it
will be necessary only to make hydraulic and
electrical connections on site).
2. 1

MODELS AVAILABLE

- "COOLIN ONLY" outside temperature
48°C. Acoustic compressor protection
cover for quiet functioning.
- "HEAT RECOVERY UNITS"
(D) Desuperheater Unit, with air-cooling,

2.2. 1 Standard equipment

NSB A
• Shell & tube
• Pressure switch
• Water inlet and outlet sensors (SIW - SUW)
• Victaulic water connections
WARNING WATER FILTER NOT SUPPLIED
NSB E
• Shell & tube
• Pressure switch
• Water inlet and outlet sensors (SIW - SUW)
• Victaulic water connections
• DCPX phase cut electronic device that allows a
reduction in the number of fan rpms as the temperature
conditions in the room change.
WARNING WATER FILTER NOT SUPPLIED
NSB D
• Shell & tube
• Pressure switch
• Water inlet and outlet sensors (SIW - SUW)
• Victaulic water connections
• DCPX phase cut electronic device that allows a
reduction in the number of fan rpms as the temperature
conditions in the room change.
• plate-type heat exchanger (desuperheater) 1 per circuit.
WARNING WATER FILTER NOT SUPPLIED

DESCRIPTION AND CHOICE OF UNIT

2
complete with partial heat recovery section.
In this configuration a refrigerant / water
heat exchanger on the gas delivery line and
a condensation check is added to every
chiller circuit unlike the base configuration.
The heater is specially scaled to guarantee
the recovery of the heat for the production
of cold water for use in bathrooms or
other.
(T) Total heat recovery Unit, complete
with total heat recovery section. In this
configuration a refrigerant / water heat
exchanger on the gas delivery line as well as
a three-way valve that provides for the cut in
of the total heat recovery is added to every
chiller circuit unlike the base configuration.
The heater is specially scaled to guarantee
the recovery of the heat for the production
of cold water for use in bathrooms or
other
2.2 VERSION AVAILABLE
- "HIGH EFFICINCY"
outside temperature 48°C. Acoustic
compressor protection cover for quiet
functioning.
- "SILENCED HIGH EFFICINCY (E)" This
NSB T
• Shell & tube
• Pressure switch
• Water inlet and outlet sensors (SIW - SUW)
• Trhee way valve
• Victaulic water connections
• Heat recovery (Shell & tube)
WARNING WATER FILTER NOT SUPPLIED
• Total recovery (shell and tube exchanger) 1 per
circuit
NSB with pump (from PA to PK)
• Shell & tube
• Pressure switch
• Water inlet and outlet sensors (SIW - SUW)
• Victaulic water connections
• Water filter not supplied
• 1 or 2 pumps for the hydraulic circuit
• 2 x 25 litre expansion tanks per circuit with gate valve
cut-off.
• Load group, 1 per circuit cut off by gate valve
WARNING WATER FILTER NOT SUPPLIED
configuration in several of the high
efficiency versions (A), has mufflers
on the pressing line, and a phase cut
electronic device that allows a reduction
in the number of fan rpms as the
temperature conditions in the room
change.
- "VERSION Y" version Y :this is the version
whereby refrigerated water under the
standard value of +4 °C up to a mini-
mum of -6 °C to be produced. Contact
company headquarters for lower values..
NSB series chillers are available in 32 sizes.
When the numerous options are combined,
it is possible to configure each model in
the NSB series in such a way as to meet
the most varied of plant requirements. The
following configurator shows the methods
by which the commercial code of sixteen
fields that make it up representing the
options available is compiled.
3