6 Aermec cod.
5167556_03 17.09
NRK 0200-0700
1. DESCRIPTION OF THE UNIT
The reversible heating pumps of the NRK series were designed to meet the require-
ments of the systems where both cooled water for environment cooling and high
temperature water for heating are required. The compressor with additional vapour
admission in the compression cycle allows to obtain hot water temperatures up to
65°C and an increase of the operating limits with regards to outside temperatures of
up to -20°C.
Multi-circuit unit designed to provide the maximum
efficiency both with full load and partial loads,
guaranteeing operating continuity should one of the
circuits stop to facilitate maintenance.
Having several compressors and circuits ensures
control of more steps of power yielded in both modes.
These high temperature units are commonly used in the requalification of buildings
where the replacement of centralised boilers is required, and preservation of the
existing heating system (including radiators) is needed.
This scenario is frequent for buildings like schools or offices, but can also applied to
residential complexes like condominiums, where requalification expenses need to
be limited, while offering at the same time a renewable energetic source such as the
heat pump.
Another advantage is the possibility to manage hot water production for heating (or
even domestic hot water) as well as the cooled water for summer conditioning with
the same machine.
To get a solution that offers economic savings and facilitates
the installation, these units may be configured with an integrated hydronic kit.
The kit consists of the main hydraulic components and is available in many configura-
tions with single pump or with reserve pump, with low or high head and accumulator.
(see configurator)
Full operation with outside temperatures of up to -20°C and hot water production up
to 65°C
MODEL
Standard reversible heat pump without partial heat recovery.
Reversible heat pump complete with partial heat recovery. The refrigerant/water heat
exchanger is placed in all circuits upstream the condenser and its size ensure heat
recovery for hot water production which may be used as domestic hot water or other
use.
VERSION
NRK_HA
Versions with high efficiency configurations beyond the A-class efficiency required by
Eurovent.
NRK_HE
Low noise A-class high efficiency versions. This version is equipped with sound insula-
tion dedicated to the compressor compartment and the reduction of the fan revolu-
tions. Since the speed of the fans is electronically controlled, it will be automatically
increased to keep ensuring good unit operation in the event of critical ambient
conditions.
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