CHA-M/SZ/K 724÷1306

Aircooled liquid Chillers and Heat Pumps with axial fans, Scroll compressors and shell and tube exchanger

The models of NEXTPOWER range are dedicated to conditioning of medium and wide areas. The intelligent control module optimizes functioning times and supplied power from compressors based on heat load demands in the system.
The range is equipped with R410A refrigerant and features Scroll compressors and shell and tube exchanger.
High reliability is the key plus of NEXTPOWER, thanks to the use of components built in large series and the management of several compressors allowing an increased compressor life span and the reduction of machine stopping risks: a faulty compressor will not compromise the functioning of the unit, that will continue to work with decreased power levels. The optional Air Section Divider allows to service one circuit without stopping the whole unit.
NEXTPOWER obtains high energy yield with high ESEER values and excellent silent
functioning, since the fans adjust their speed to the actual system load, providing benefits
in terms of silent operation, important especially at night.
NEXTPOWER, thanks to the high partialization and the intelligent control module, doesn't require inertial storage tank.

The units feature 460V power supply and 60Hz frequency.

Versions

CHA-M/SZ/K - Cooling only
CHA-M/SZ/K/WP - Reversible Heat Pump

Power range

219-510 kW
62.0-145 Ton

Features

Structure with supporting frame, made of galvanised sheet metal with additional protection provided by polyester powder coating.
Scroll compressors with oil sight glass, internal overheat protection and crankcase heater.
Axial fans directly coupled to an electric motor with external rotor.
Condenser made of copper tubes and aluminium finned coils.
Shell and tube type evaporator, with two independent circuits on the refrigerant side and one on the water side.
Electronic expansion valve.
R410A refrigerant.
Electrical board includes: main switch with door safety interlock, protection modules, overload protection for compressors and thermocontacts for fans.
Microprocessor control and regulation system.

Accessories

Factory fitted accessories

SL Unit silencement
CT Condensing control down to 0 °C
BT Low water temperature kit
HR Desuperheater
HRT/S Total heat recovery in series
TX Coil with pre-coated fins
AD Air section divider
IS Modbus RTU protocol, RS485 serial interface

Loose accessories

MN High and low pressure gauges
CR Remote control panel
RP Coils protection metallic guards
AG Rubber shock absorbers
FL Flow switch

Technical data

			724	824	1044	1206	1306
Cooling	Cooling capacity (1)	kW	219	285	368	448	510
Cooling	Absorbed power (1)	kW	77,2	99,0	120	157	193
Heating	Heating capacity (2)	kW	254	328	407	506	591
Heating	Absorbed power (2)	kW	83,3	108	128	167	190
Compressor	Quantity	n°	4	4	4	6	6
	Refrigerant circuits	n°	2	2	2	2	2
	Capacity steps	n°	4	4	4	6	6
Evaporator	Water flow	l/s	10,46	13,62	17,58	21,40	24,37
	Pressure drops	kPa	55	58	65	46	53
	Water connections	DN	100	100	100	100	100
Electrical characteristics	Power supply	V/Ph/Hz	460/3/60	460/3/60	460/3/60	460/3/60	460/3/60
	Max. running current	A	140	170	217	255	314
	Max. starting current	A	296	357	445	448	543
Sound pressure	STD version (3)	dB(A)	67	68	68	69	70
Sound pressure	With SL accessory (3)	dB(A)	64	65	65	66	67
Weights	Transport weight	kg	1639	1715	2330	2492	2749
Weights	Operating weight	kg	1735	1810	2455	2645	2910

Dimensions

			724	824	1044	1206	1306
L	STD	mm	2800	2800	3900	3900	3900
W	STD	mm	2200	2200	2200	2200	2200
H	STD	mm	2100	2100	2100	2100	2100

Notes

1 Chilled water from 12 to 7 °C, ambient air temperature 35 °C.
2 Heated water from 40 to 45 °C, ambient air temperature 7 °C d.b./6 °C w.b.
3 Sound pressure level measured in free field conditions at 1 m from the unit. According to ISO 3744.
N.B. (1) Weights of WP version are specified on technical brochure.