MRA/K 182÷604

Aircooled condensing units with radial fans and Scroll compressors

The indoor condensing units of the MRA/K 182÷604 series, with R410A refrigerant, are designed to satisfy the needs of medium-sized domestic or industrial systems with particular difficulty in positioning units outside the building.
These units are combined with evaporators in split system air conditioning installations, allowing the rooms to be cooled and dehumidified. They can also be used in combination with hydronic evaporating units in both air conditioning and industrial process cooling applications
They are equipped with Scroll compressors and radial fans even in a high ESP version, and they enable immediate and efficient use thanks to particular technical and design adjustments.
A wide range of accessories, factory fitted or supplied separately, complete the outstanding versatility and functionality of the series.

Versions

MRA/K - Cooling only
MRA/K/AP - Cooling only with high ESP fans

Power range

51.0-188 kW
14.0-54.0 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.
Radial fans coupled to 3-phase motors by V belt and variable pulley.
Condenser made of copper tubes and aluminium finned coil.
R410A refrigerant.
Electrical board includes: main switch with door safety interlock, fuses, thermal protection relays for compressors and thermocontacts for fans.
Microprocessor control and regulation system.

Accessories

Factory fitted accessories

IM Automatic circuit breakers
SL Unit silencement
RFM Cooling circuit shut-off valve on discharge line
RFL Cooling circuit shut-off valve on liquid line
CC Condensing control down to -20 °C
TX Coil with pre-coated fins
RL Liquid receiver
VS Solenoid valve
BP Hot gas by-pass valve
FF Dryer filter and sight glass
SS Soft start
IS Modbus RTU protocol, RS485 serial interface
CP Potential free contacts
MN High and low pressure gauges

Loose accessories

CR Remote control panel
RP Coils protection metallic guards
AG Rubber shock absorbers
AM Spring shock absorbers

Technical data

			182	202	242	262	302	363	393	453	524	604
Cooling	Cooling capacity (1)	kW	50,6	58,6	66,9	77,2	88,4	102	117	134	156	188
Cooling	Absorbed power (1)	kW	18,3	21,4	24,9	28,2	31,9	36,6	43,2	49,6	58,2	69,2
Compressor	Quantity	n°	2	2	2	2	2	3	3	3	4	4
	Refrigerant circuits	n°	1	1	1	1	1	1	1	1	2	2
	Capacity steps	n°	2	2	2	2	2	3	3	3	4	4
Connections	Suction line	Ø mm	1x35	1x35	1x35	1x35	1x35	1x42	1x42	1x42	2x35	2x35
Connections	Liquid line	Ø mm	1x22	1x22	1x22	1x22	1x22	1x28	1x28	1x28	2x22	2x22
Available static pressure	STD version	Pa	165	147	120	120	105	115	135	135	190	105
Available static pressure	High ESP version	Pa	298	288	263	263	245	256	---	---	400	---
Electrical characteristics	Power supply	V/Ph/Hz	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50
	Max. running current	A	43	48	57	61	70	80	94	107	122	146
	Max. starting current	A	166	169	180	193	237	204	227	275	255	313
Sound pressure	STD version (2)	dB(A)	70	70	70	70	71	73	74	74	75	76
	STD version with SL accessory (2)	dB(A)	68	68	68	68	69	71	72	72	73	74
	High ESP version (2)	dB(A)	71,0	71,0	71,0	71,0	72,0	74,0	---	---	76,0	---
	High ESP version with SL accessory (2)	dB(A)	69,0	69,0	69,0	69,0	70,0	72,0	---	---	74,0	---
Weights	Transport weight	kg	595	600	670	680	725	825	865	895	1080	1185
Weights	Operating weight	kg	605	610	680	690	735	840	880	910	1105	1215

Dimensions

			182	202	242	262	302	363	393	453	524	604
L	STD/AP	mm	2350	2350	2350	2350	2350	2350	2350	2350	3550	3550
W	STD/AP	mm	1100	1100	1100	1100	1100	1100	1100	1100	1100	1100
H	STD/AP	mm	1705	1705	1705	1705	2005	2005	2005	2005	2005	2005

Notes

1 Evaporating temperature 5 °C, ambient air temperature 35 °C.
2 Sound pressure level measured in free field conditions at 1 m from the unit. According to ISO 3744.