RTA-M/K/MS 181÷602

Double Skin packaged Roof Top units with Scroll compressors, radial fans or EC Inverter Plug-Fans and Mixing Box

The double skin packaged Roof Top units of the TOP AIR series are the ideal solution for air conditioning of wide surfaces such as shopping malls and restaurants, canteens or for industrial areas. RTA-M/K units feature Scroll compressors with R410A refrigerant and radial fans or EC Inverter Plug-Fans. The EC Inverter Plug-Fans with high energy efficiency backward blades both for intake as well as delivery are managed by an electronic control adjusting fans' rotational speed to adapt the air flow to the system capacity.
Equipped with extruded aluminium alloy sections and 50mm-thick sandwich panelling, these units are available in Cooling only and Reversible Heat Pump version.
The flat or pocket filters help to keep the air quality at a suitable level in order to guarantee appropriate hygiene standards.
The MS units have an high level of modularity and adaptability to every plant-engineering need: these units feature, in addition to the basic sections, a MIXING BOX.

Versions

RTA-M/K/MS - Cooling only with radial fans and Mixing Box
RTA-M/K/WP/MS - Reversible Heat Pump with radial fans and Mixing Box
RTA-M/K/EC/MS - Cooling only with EC Inverter Plug-Fans and Mixing Box
RTA-M/K/EC/WP/MS - Reversible Heat Pump with EC Inverter Plug-Fans and Mixing Box

Power range

57.0-192 kW
16.0-55.0 Ton

Features

Structure of base perimeter made of steel sheet elements galvanised. Frame made of extruded aluminium alloy profiles connected by 3 way joints. Assembling of the base to the frame is of dual support and grants the walking on the base panels installation without sticking out screws. 50mm thick sandwich panels made of prepainted steel sheet; water proofing granted by gaskets having shape memory for perfect seal up even after repeated removals. Section connection is effected by means of assembling conic stirrups and water proofing is granted by gaskets.
Scroll compressors with oil sight glass, internal overheat protection and crankcase heater.
Condenser and evaporator with copper tube and aluminium finned coil.
Delivery radial fans coupled to 3-phase motors by V belt and variable pulley.
High efficiency delivery reverse blade EC INVERTER PLUG-FANS, with electronic speed control to easily adapt to the system characteristics.
R410A refrigerant.
Electrical board includes: door interlocking isolator, fuses, thermal protection relays on compressors, thermocontacts for the fans of the condensing unit and contactors for the fan motors of the air handling unit.
Microprocessor for the automatic control of the unit.

Accessories

Factory fitted accessories

SL Unit silencement
CT Condensing control down to 0 °C
TXC Condensing coil with pre-coated fins
TXE Evaporating coil with pre-coated fins
FT/M6 Soft bag filters efficency M6
FT/M7 Soft bag filters efficency F7
FT/M8 Soft bag filters efficency F8
FT/R6 Rigid bag filters efficency M6
FT/R7 Rigid bag filters efficency F7
FT/R8 Rigid bag filters efficency F8
WS2 Hot water coil with 3-Way valve
EHG Electrical heater with step regulation
SQ Air quality sensor
PF Differential pressure switch filters control
IS Modbus RTU protocol, RS485 serial interface
CP Potential free contacts
RP Coils protection metallic guards

Loose accessories

CS Dampers rain hood
MN High and low pressure gauges
CR Remote control panel
AG Rubber shock absorbers

Complementary sections

UM Section with preparation for Humidifier

Technical data

			181	241	301	392	522	602
Cooling	Cooling capacity (1)	kW	57,1	76,2	96,0	126	153	192
Cooling	Absorbed power (1)(2)	kW	20,9	24,3	28,6	38,1	49,5	58,2
Heating	Heating capacity (3)	kW	59,5	76,5	96,3	128	156	195
Heating	Absorbed power (3)(2)	kW	18,0	19,9	24,1	33,8	40,5	50,8
Air treatment section	Air flow	m³/s	2,7	4,1	4,9	6,3	8,2	9,7
	Available static pressure	Pa	250	250	250	250	250	250
	Fan	n°	1	1	1	1	1	1
	Filter	Tipo	G4	G4	G4	G4	G4	G4
Air treatment section (EC version)	Air flow	m³/s	2,7	4,1	4,9	6,3	8,2	9,7
	Available static pressure	Pa	250	250	250	250	250	250
	Fan	n°	1	2	2	2	4	4
	Filter	Tipo	G4	G4	G4	G4	G4	G4
Condensing section	Compressor	n°	1	1	1	2	2	2
	Refrigerant circuits	n°	1	1	1	1	1	1
	Capacity steps	n°	1	1	1	1	1	1
Hot water coil	Heating capacity (4)	kW	85	125	150	200	250	300
	Air pressure drops	Pa	30	31	31	36	35	35
	Water flow (4)	l/s	2,03	2,99	3,58	4,78	5,97	7,17
	Water pressure drops	kPa	45	48	49	51	53	57
	Water connections	"G	1"½	1"½	1"½	2"	2"	2 ½"
Electrical heater	Power supply	V/Ph/Hz	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50
	Heating capacity	kW	15	27	27	41	41	48
	Max. absorbed current	A	22	39	39	59	59	69
	Steps	n°	2	2	2	4	4	4
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
	Max. running current	A	44	53	68	87	105	136
	Max. starting current	A	220	265	329	264	318	397
Electrical characteristics (EC version)	Power supply	V/Ph/Hz	400 / 3 / 50	400 / 3 / 50	400 / 3 / 50	400 / 3 / 50	400 / 3 / 50	400 / 3 / 50
	Max. running current	A	40	46	61	80	98	134
	Max. starting current	A	216	258	322	257	311	395
Sound pressure	(5)	dB(A)	59	59	59	61	62	62
Sound pressure (EC version)	(5)	dB(A)	58	58	58	60	61	61
Weights	Transport weight	kg	1090	1262	1410	1990	2316	2620
Weights	Operating weight	kg	1078	1250	1398	1974	2296	2600
Weights (EC version)	Transport weight	kg	1050	1232	1370	1900	2276	2540
Weights (EC version)	Operating weight	kg	1038	1220	1358	1884	2256	2520

Dimensions

			181	241	301	392	522	602
L	STD/EC	mm	3430	3640	3740	4950	5600	5750
W	STD/EC	mm	2200	2200	2200	2200	2200	2200
H	STD/EC	mm	2100	2340	2340	2340	2340	2510

Notes

1 Evaporator inlet air temperature 27 °C d.b./19 °C w.b.; ambient air temperature 35 °C.
2 Excluded the power absorbed by fans of air treatment section.
3 Condenser inlet air temperature 20 °C, ambient air temperature 7 °C d.b./6 °C w.b.
4 Inlet air temperature 20 °C, water temperature 70/60 °C.
5 Sound pressure level measured in free field conditions at 1 m from the unit. According to ISO 3744.
N.B. (1) Weights of WP versions are specified on technical brochure.