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NTN Air handling unit

HEATING
AND COOLING

SUPPLY

water

HEATING CAPACITY

from 3,6
to 17,1

COOLING CAPACITY

from 1,5
to 9,3

AIR FLOW RATE

from 430
to 1.350

Description

The structure consists of a girder-built underframe made of anticorodal extruded aluminium section bars that are linked by means of Nylon joints. The cabinet consists of multi-layer, painted steel panels. The engine-ventilator group is isolated from the rest of the structure by means of suitable buffers on the basement and a Neoprene anti-vibrating joint between the air inlet and the panels. The dual-intake centrifugal fans featuring forward-oriented fins are balanced both statically and dynamically. The 95, 130 and 175 versions are equipped with twin ventilators. The engine-ventilator group features variable pitch pulleys and V-belts for all versions. The 4-pole electric engines are ventilated outside and isolated according to F-class standards, with IP55 protection mounted on dedicated guides allowing to regulate belt tension. The place to install batteries can host both heating and/or cooling batteries and has been designed to be equipped with two batteries – oriented either horizontally or vertically. All batteries feature copper piping and aluminium fins: devices working with hot water have 2 or 4 ranks, while devices working with chilled water have 4 or 6 ranks. The filtering section is equipped with multiply synthetic cell filters with 85% ponderal filtering efficiency. The NTN units are also available with centrifugal fan whose engine is directly coupled to the fan wheel (NTN/D version).

Dimensions

Model	Overall dimensions mm				Weight Kg*
Model	A	B	C/H	C/V	M	/ H	/ V
NTN 30	1.180	770	1.290	1.540	80	197	220
NTN 53	1.420	770	1.290	1.540	80	240	268
NTN 72	1.660	770	1.290	1.540	80	260	290
NTN 95	1.780	920	1.290	1.830	80	360	380
NTN 130	1.940	1.100	1.290	2.010	80	380	410
NTN 175	2.300	1.100	1.290	2.090	80	580	550

(*) Indicative weight in standard configuration (included optional 4-ranks battery mounted).

Technical features

Model	U.M.	NTN 30	NTN 53	NTN 72	NTN 95	NTN 130	NTN 175
Nominal air flow rate	Nm³/h	3.000	5.300	7.200	9.600	13.000	17.500
Air flow rate (MIN – MAX)	Nm³/h	2.200-3.800	3.900-6.700	6.300-8.100	8.200-11.000	11.000-15.000	15.000-20.000
Static pressure*	Pa	250-430	370-550	270-570	300-430	300-570	350-570
Fan type	CENTRIFUGO
N° speed	n°	1	1	1	1	1	1
Motor power	kW	0,75	1,5	2,2	2,2	4,0	5,5
Electrical supply	V - 50Hz	400 3N ~	400 3N ~	400 3N ~	400 3N ~	400 3N ~	400 3N ~
Warm water 4-rows battery
Heating capacity⁽¹⁾	kW	50.8	79.4	105	142	193	252
Water flow rate	m³/h	4.47	6.99	9.27	12.47	16.95	22.13
Water pressure drop	kPa	13.2	5.5	11	15.1	19	5.9
Cooled water 6-rows battery
Total cooling capacity⁽²⁾	kW	35.6	55.6	75	98.9	139	170
Sensible cooling capacity⁽²⁾	kW	19.22	30.58	41.25	54.4	76.45	95.2
Water flow rate	m³/h	6.09	9.53	12.85	16.95	23.77	29.11
Water pressure drop	kPa	17.5	11.9	24.6	17.6	43.2	6.5

*Refers to the fan with standard motor: to obtain the effective static pressures it is necessary to subtract the load losses of the installed components/accessories.
(1) Heating: incoming air temperature 0°C ( dry bulb ). - Incoming/outgoing Water temperature 70/60°C – Data referred to the nominal air flow.
(2) Cooling: incoming air temperature 32°C ( dry bulb ), relative humidity 50% - Incoming/outgoing Water temperature 7/12°C – Data referred to the nominal air flow.