NX-N-G06 0604T - 1204T

Reversible unit, air source for outdoor installation 142 - 322 kW

Outdoor reversible unit for the production of chilled/hot water with hermetic rotary Scroll compressors, low-GWP and ozone-friendly refrigerant R454B, axial-flow fans, copper tubes aluminum fins air coils, shell and tubes heat exchanger, and thermostatic or electronic expansion valve, according to the model. External panels in pre-clad sheet steel and base in galvanised steel with paint finish. The range is composed of units equipped with four compressors in tandem configuration on two independent refrigerant circuits.

EUROPE

CE

50 Hz

Topic overview

Product features
Technical data
Produkt-Informationen
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Product features

Features

LOW GWP REFRIGERANT

The new generation refrigerant R454B is the most eco-sustainable alternative to traditional refrigerant R410A, offering a 76% reduction in terms of GWP (Global Warming Potential GWP of R454B = 467, GWP of R410A = 1924 as per IPCC rev. 5th) and zero impact on the ozone layer.

WIDE OPERATING LIMITS

These units are operative at full load in heat pump mode down to -15°C outdoor air temperature, and up to 46°C in chiller mode without needing additional options. At -15°C outdoor air temperature, these heat pumps are able to produce hot water up to 42°C at full load.

ELECTRONIC EXPANSION VALVE

The use of the electronic expansion valve generates considerable benefits, especially in cases of variable demand and different external conditions. It has been introduced to these units as a result of accurate design choices concerning the cooling circuit and the optimization of operation in various different working conditions. The electronic expansion valve comes standard in the high-efficiency CA version.

CLASS A EFFICIENCY

The full range is also available with the Class A efficiency rating (in heating). CA version guarantees noise configurations at premium levels of efficiency thanks to the generous sizing of the refrigerant-exchange surface areas and to an accurate control of the fans.

SHELL&TUBE HEAT EXCHANGER

The shell and tube exchanger provides the highest flexibility for the unit’s installation, keeping the pressure drops on the hydronic side at a minimum, thus representing the best choice for all the hydronic applications.

INTEGRATED HYDRONIC GROUP

The optional built-in hydronic module already contains the main water circuit components; available with single or twin in-line, for achieving both low or high head.

TWO SOUND EMISSION LEVELS

Two different sound emission levels available. This means the best unit can be identified based on requirements, according to the system where it will be installed and the application.

Technical data

Produkt-Informationen

K - Standard efficiency
SL-K - Super low noise, standard efficiency
LN-K - Low Noise, Key efficiency, and compact version
CA - Class A efficiency
LN-CA - Low Noise, Class A efficiency
SL-CA - Super Low noise version, Class A efficiency

- - Basic function
D - Partial condensing heat recovery function

Set-up for remote connectivity with ModBus/Echelon protocol cards
Remote control keyboard (distance 200m and 500m)
Soft starters
Electronic expansion valve
Night mode to limit the maximum noise level of the unit.
User Limit Control (U.L.C.) allows for safe startup of the unit in critical water and air temperature conditions.
KIPlink user interface
Traditional coils available with prepainted fins or Fin Guard Silver protective treatment.
EC fans with DC brushless motor
Soft start
Hydronic kit available in different configurations with 1 or 2 fixed or variable speed pumps and buffer tank

Electronic control W3000TE

The W3000TE controller offers advanced functions and algorithms. The Compact keypad features an easy-to-use interface and a complete LCD display that allows consulting and intervening on the unit by means of a multi-language menu (19 languages are available). The regulation is based on the patented “Quickmind” water temperature regulation logic uses self-adapting control to maintain flow temperatures and optimise performance even in low water content scenarios. As an alternative, the proportional or proportional-integral regulations are also available. The diagnostics comprises a complete alarm management system, with the “black-box” (via PC) and the alarm history display (via display or also PC) for enhanced analysis of the unit operation Optional proprietary devices can perform the adjustment of the resources in systems made of several units. Consumption metering and performance measurement are possible as well. Supervision can be easily developed via proprietary devices or the integration in third party systems by means of the most common protocols as ModBus, Bacnet, Bacnet-over-IP, LonWorks. Compatibility with the remote keyboard (up to 8 units). The defrosting (air source reversible unit only) follows a proprietary self-adaptive logic, which features the monitoring of several operational parameters. This allows to reduce the number and duration of the defrost cycles, with a benefit for the overall energy efficiency.