AERMEC NRL 280-75 User manual

TECHNICAL MANUAL
60Hz
60Hz
13_01. 5641300_00
NRL 280-750
CHILLER
REVERSIBLE HEAT PUMP
• EXTERNAL UNIT
• HIGH EFFICENCY
• HOT WATER PRODUCING UP TO 131°F / 55°C
• POWER SUPPLY 60Hz
EN

3Aermec 13_01. 5641300_00
NRL 0280-0750 60Hz
EN
AERMEC S.p.A. reserves the right at all times to make any modification for the improvement of its product and is not obliged to add these modification to machines of
previous manufacture that have already been delivered or are being built.
Dear Customer, Thank you for choosing an AERMEC product. This product is the result of many years of expe-
rience and in-depth engineering research, and it is built using top quality materials and advanced technologies.
In addition, the CE mark guarantees that our appliances fully comply with the requirements of the European
Machinery Directive in terms of safety. We constantly monitor the quality level of our products, and as a result
they are synonymous with Safety, Quality, and Reliability. Product data may be subject to modifications dee-
med necessary for improving the product without the obligation to give prior notice.
Thank you again.
AERMEC S.p.A

4Aermec 13_01. 5641300_00
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EN
1. Descripon and choce of unit........................................................6
2. Check list .....................................................................................6
3. Configurator .................................................................................7
4. Cooling circuit...............................................................................8
4.1. NRL cooling circuit only cooling........................................................ 8
4.2. NRL cooling circuit heat pump.......................................................... 9
5. Descripon of components .........................................................10
5.1. Chiller circuit ................................................................................... 10
5.2. Frame and fans ............................................................................... 10
5.3. Hydraulic circuit standard components .......................................... 10
5.4. Hydraulic components for configurable versions............................ 10
5.5. Safety and control components...................................................... 10
5.6. Electrical panel control and power ................................................. 10
6. Accessories .................................................................................12
6.1. Mechanical accessories................................................................... 12
6.2. Electrical accesories ....................................................................... 12
7. Technical data .............................................................................14
7.1. Technical data version "A E" ......................................................... 14
8. Technical data "HA HE" version ................................................17
9. Operaon limit ...........................................................................21
9.1. Cooling mode ¹ ................................................................................ 21
9.2. Heang mode ¹................................................................................ 21
9.3. Project data..................................................................................... 21
10. Correcve factors........................................................................22
10.1. Input power and cooling capacity
"standard version"/ "heat pump version in cooling mode" ........... 22
10.2. Heang capacity and input power.................................................. 23
10.3. For ∆t different to the nominal ....................................................... 23
10.4. Deposit factors ................................................................................ 23
11. Pressure drop .............................................................................24
11.1. System side total pressure drop only cooling version..................... 24
11.2. System side total pressure drop heat pump in cooling mode......... 24
11.3. System side total pressure drop heat pump in heang mode ........ 24
12. Useful heads ............................................................................... 25
13. Ethylene glycol soluons.............................................................29
14. Expansion tank calibraon ..........................................................30
15. Minimum water content .............................................................30
16. Part load.....................................................................................31
17. Sound data .................................................................................32
18. Control and safety parameters calibraon...................................33
18.1. Thermomagnec............................................................................. 34
INDEX

5Aermec 13_01. 5641300_00
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EN

6Aermec 13_01. 5641300_00
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EN
Standards and Directives respected on
designing and constructing the unit:
PROTECTION RATING
1. IP 24
ACOUSTIC PART:
1. ISO DIS 9614/2
INTENSIMETRIC METHOD
2. SOUND POWER EN ISO 96142
3. SOUND PRESSURE (EN ISO 3744)
REFRIGERANT GAS:
This unit contains fluoride gases with
greenhouse effect covered by the
Kyoto Protocol. Maintenance and
disposal must only be performed by
qualified staff.
STANDARD:
UL 1995
Heating and cooling equipment.
ANSI/NFPA
Standard 70 National Electrical code
(N.E.C.).
CSA C.22.1.- C.22.2
Safety Standard Electrical Installation.
Chillers and heat pumps for outdoor condensed in the
air with R410A Series NRL have been designed and
manufactured to satisfy heating and cooling needs
and the production of domestic hot water (DHW) in
medium to small commercial or residential buildings.
Maximum reliability
The presence of several scroll compressors allows NRL
chillers various partialisations of the cooling capacity.
Models:
1. NRL "°" standard chiller
2. NRL "H" heat pump *
3. NRL "C" motocondensing
The versions can be in different set-ups at the same
time in order to satisfy a wide range of plant enginee-
ring solutions:
1. "A" HIGH EFFICIENCY
2. "E" SILENCED HIGH EFFICIENCY
3. "D" WITH DESUPERHEATER
4. "T" WITH TOTAL RECOVERY
Configurations not allowed:
YD / YT / YH
HT / HC
TC / DC
1. DESCRIPTION AND CHOCE OF UNIT
* Possibility of production of D.H.W.
- only "I" version (fan speed modulating for condensation control).
- VMF
- AER485
2. CHECK LIST
COMPONENTS VERSIONS
COOLING CIRCUIT ° H C D T
THERMOSTATIC VALVE X Y CONFIGURATION OPTIONyes yes no no no
EXCHANGER PLATE EVAPORATORyes yes no yes yes
EXCHANGER PLATE TOTAL RECOVERYno no no no yes
EXCHANGER PLATE DESUPERHEATERno no no yes no
AIR SIDE EXCHANGE yes yes yes yes yes
COMPRESSOR yes yes yes yes yes
DEHYDRATOR FILTER yes yes yes yes yes
HIGH PRESSURE SWITCH yes yes yes yes yes
LOW PRESSURE SWITCH no no no no no
HIGH PRESSURE TRANSDUCER yes yes yes yes yes
LOW PRESSURE TRANSDUCER yes yes yes yes yes
LIQUID INDICATOR yes yes yes yes yes
LIQUID TANK no yes no no yes
ONEWAY VALVES no yes no no yes
LIQUID SEPARATOR no yes no no yes
CYCLE REVERSE VALVE no yes no no yes

7Aermec 13_01. 5641300_00
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EN
3. CONFIGURATOR
DESCRIPTION
1,2,3 NRL
4,5,6 SIZE
028 - 030 - 033 - 035 - 050 - 055 - 060 - 065 - 070 - 075
7 COMPRESSOR
0
8 THERMOSTATIC VALVE
°Standard mechanical thermostatic valve with produced water up to 39,2°F / +4°C
YMechanical thermostatic valve with produced water from 39,2°F / +4°C to -42,8°F / -6°C
XElectronic thermostatic valve min. Water out temp 39,2°F / +4°C, (contact the factory for lower temperatures)
9 MODELS
°Chiller only
HHeat pump
C
Without evaporator
10 HEATHING RECOVERY
°Without Recovery
DWith Desuperheater (data on demand)
TWith Total Heat Recovery (data on demand)
11 VERSION
AHigh efficiency (not available for size 028 ÷ 035)
EHigh efficiency low noise (data on demand for size 050 ÷ 075)
12 COILS
°Alluminium
RCopper
SCopper tin plated
VEpoxy coated
13 FANS
°Standard
IFan speed modulating for condensation control
14 SUPPLY
6230/3/60 With magnet circuit breakers
7460/3/60 With magnet circuit breakers
8575/3/60 With magnet circuit breakers
15,16 HYDRONIC KIT
00 Without hydronic kit
01 Tank and single low head pump
02 Tank and single low head pump and reserve pump
03 Tank and single high head pump
04 Tank and single high head pump and reserve pump
P1 Single low head pump
P2 Single low head pump and reserve pump
P3 Single high head pump
P4 Single high head pump and reserve pump
Configuraons NOT permied:
YD / YT / YH
HT / HC
TC / DC /
Venlaon "I" mandatory vers.E sizes from 050 to 075 (units cooling only and heat pump)

8Aermec 13_01. 5641300_00
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4. COOLING CIRCUIT
CN
TEV
IDL IDL
HPT HPS
LPT
CP CP
LPT
BHE
HPT HPS
TEV
FF
CN
KEY
BHE EXCHANGER PLATE
CN AIR SIDE EXCHANGE
CP COMPRESSOR
F DEHYDRATOR FILTER
HPS HIGH PRESSURE SWITCH
HPT HIGH PRESSURE TRANSDUCER
IDL LIQUID INDICATOR
LPT LOW PRESSURE TRANSDUCER
4.1. NRL COOLING CIRCUIT ONLY COOLING

9Aermec 13_01. 5641300_00
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HPT HPS
LS
VIC VIC
LS
HPS
LPT LPT
HPT
BHE
IDL IDL
CP
CN
CV CV
CV CV
CV
CN
TEV TEV
F
AL
F
CV
CV
AL
CP
CV
KEY
AL LIQUID TANK
BHE EXCHANGER PLATE
CN AIR SIDE EXCHANGE
CP COMPRESSOR
CV ONEWAY VALVES
F DEHYDRATOR FILTER
HPS HIGH PRESSURE SWITCH
HPT HIGH PRESSURE TRANSDUCER
IDL LIQUID INDICATOR
LPT LOW PRESSURE TRANSDUCER
LS LIQUID SEPARATOR
VIC CYCLE INVERSION VALVE
4.2. NRL COOLING CIRCUIT HEAT PUMP

10 Aermec 13_01. 5641300_00
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5. DESCRIPTION OF COMPONENTS
5.1. CHILLER CIRCUIT
SCROLL COMPRESSORS
High efficiency scroll-type hermetic compressors,
assembled on elastic antivibration supports,
driven by a 2-pole electric motor with internal
thermal protection. of the electric heater casing
included as standard. The heater is automatically
powered when the unit stops, provided that the
unit is kept under tension.
WATER SIDE HEAT EXCHANGER
Of the plate-type (AISI 316), externally insula-
ted with closed cell material to reduce thermal
dispersion. Fitted, as standard, with antifreeze
heater.
5.1.1. WATER FEATURES
PH 6-8
Electric
conductivity
less than 200 mV/cm
(77°F / 25°C)
Chloride ions less than 50 ppm
Sulphuric acid ions less than 50 ppm
Total iron less than 0.3 ppm
Alkalinity M less than 50 ppm
Total hardness less than 50 ppm
Sulphur ions none
ammonia ions none
Silicone ions less than 30 ppm
SOURCE SIDE HEAT EXCHANGER
Made with copper pipes and aluminium louvered
fins blocked by mechanical expansion of the
pipes. Provided with protective grid.
DESUPERHEATER / TOTAL RECOVERY
Unit with (AISI 316) heat plate, insulated exter-
nally with closed cell material to reduce heat loss.
CYCLE INVERSION VALVE
ONLY HEAT PUMP VERSION
4way cycle inversion valve. Inverts the flow of
refrigerant gas.
LIQUID STORAGE TANK
ONLY HEAT PUMP VERSION/TOTAL RECO
VERY
Compensates the difference in volume between
louveres coil and plate exchanger, withholding
excess liquid.
DEHYDRATOR FILTER
Hermetic-mechanical with cartridges made of ce-
ramic and hygroscopic material, able to withhold
impurities and any traces of humidity present in
the cooling circuit.
ONEWAY VALVES
Allows the passage of the refrigerant in just one
direction.
MECHANICAL THERMOSTATIC VALVE
The mechanical valve, with external equaliser
positioned at the evaporator inlet, modulates the
flow of gas to the evaporator, according to the
heat load, in order to ensure a correct heating
level of the intake gas.
SOLENOID VALVE
The valve closes when the compressor turns off,
preventing the flow of refrigerant gas towards the
evaporator.
INDICATOR FOR LIQUID PASSAGE WITH HU
MIDITY PRESENCE SIGNAL
Used to check the refrigerant gas load and the
eventual presence of humidity in the cooling
circuit.
LIQUID AND PRESSING LINE TAPS
ONLY COOLING VERSION
Allows interruption of the refrigerant in the case
of extraordinary maintenance.
LIQUID SEPARATOR
ONLY HEAT PUMP VERSION
Located on the suction point of the compressor,
to protect against any flowback of liquid refrige-
rant, flooded start-ups, operation in the presence
of liquid.
BY PASS SOLENOIDE VALVE
ONLY HEATING RECOVERY VERSION
By-passes the thermostatic valve during the
defrosting cycle.
5.2. FRAME AND FANS
SUPPORT FRAME
Load-bearing structure Made of hot-galvanised
steel sheet of a suitable thickness, varnished with
polyester
powders able to resist atmospheric agents over
time.
VENTILATION UNIT
Axial fan, balanced statically and dynamically.
The electric fans are protected electrically by
magnet-circuit breakers and mechanically by
anti-intrusion metal grids, according to the IEC EN
60335-2-40 Standard.
5.3. HYDRAULIC CIRCUIT STANDARD COM
PONENTS
WATER FILTER
Equipped with steel filtering mesh; prevents the
heat exchangers from clogging.
FLOW SWITCH
It checks that there is circulation of water.If
this is not the case, it blocks the unit
SAFETY VALVE
Equipped with a piped discharger and intervenes
by discharges the over pressure in case of anoma-
lous pressures.
WATER TEMPERATURE PROBE (IN-OUT)
AIR VENT
Of the automatic type, assembled on the upper
part of the hydraulic system; it releases any air
bubbles that may be present in the system.
DRAIN TAP
5.4. HYDRAULIC COMPONENTS FOR CONFI
GURABLE VERSIONS
CIRCULATION PUMP
HIGH/LOW PUMP
Depending on the characteristics of the pump
chosen, it offers a useful head to overcome the
pressure drops in the system.
EXPANSION TANK
STANDARD SUPPLY TO PUMP AND STORAGE
TANK VERSION
With nitrogen pre-load membrane.
SAFETY VALVE
Equipped with a piped discharger and intervenes
by discharges the over pressure in case of anoma-
lous pressures.
STORAGE TANK
In order to reduce the thermal dispersion and
eliminate the phenomenon of the formation of
condensation, it is insulated with polyurethane
material of a suitable thickness. It is required to
reduce the number of peaks of the compressor
and to even the temperature of water to be sent
to the utilities.
STORAGE TANK DRAIN TAP
5.5. SAFETY AND CONTROL COMPONENTS
HIGH PRESSURE SWITCH MANUAL RESET
With fixed calibration, placed on high pressure
side of cooling circuit, inhibits functioning of
compressor if
abnormal work pressure occurs.
HIGH PRESSURE TRANSDUCER
Placed on high pressure side of cooling circuit,
signals the work pressure to control board, gene-
rating a pre-warning in case abnormal pressure
occurs.
LOW PRESSURE TRANSDUCER
Allows displaying, on the microprocessor board
display, the value of the compressor's suction
pressure (one per circuit) on the low-pressure
side of the cooling circuit
SAFETY VALVE
Equipped with a piped discharger and intervenes
by discharges the over pressure in case of anoma-
lous pressures.
- Set at 45 bar on the branch HP
- Set at 30 bar on the branch LP
LOW PRESSURE SWITCH
5.6. ELECTRICAL PANEL CONTROL AND
POWER
Electric board in compliance with standards EN
60204-1/IEC 204-1, complete with:
- door lock main isolating switch,
- fuses and contactors for compressors and fans,

11Aermec 13_01. 5641300_00
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ELECTRONIC REGULATION
GR3
with proportional-integral algorithm: maintains
average output temperature at value set
• Self-adapting differential switch: guarantees
• minimum functioning times of the compressor in
systems with low water content.
• Intelligent defrosting for pressure reduction:
• allows to determine when the coil is effectively defrosted,
avoiding useless defrosting
• Set-point compensation with external temperature
(with external air probe accessory): reduces energy
consumption
• Condensation check based on the pressure rather
than on temperature for absolute stability (with DCPX
revs. adjuster accessory )
• Inverse condensation check for the heat pump functioning
mode also in summer (with DCPX revs. adjuster
accessory)
• Pre-alarms with automatic reset: in the case of alarm,
a certain number of restarts are allowed before the
definitive
• block
• Alarm on the ΔT: to identify wiring errors (reverse rotation)
or blocked cycle reversing valve
• Compressor functioning hours count.
• Compressor peak count.
• Historical alarms
• Autostart after voltage drop.
• Local or remote control
Display of the start of the unit:
a.Voltage presence
b. compressor ON/OFF
c. functioning mode (hot/cold)
d. alarm active
Probes, transducers and parameters
display
a. Water outlet
b. water inlet
c. Coil temperature (heat pumps)
d. Pressing gas temperature
e. External air temperature (heat pumps,
cooling only with DCPX and probe)
f. Pressure delivery (heat pumps)
g.Intake pressure (heat pumps)
h. Temperature error (sum of the proportional and integral
error)
i. Stand-by times for start-up/switch-off of the compressor
Alarms management:
a. Low pressure
b. High pressure (primary alarm: switch directly blocks supply
to compressor)
c. High discharge temperature
d. Anti-freeze
e. Water differential flow switch. Alarm on the ΔT
−Alarms with automatic reset with limited number of restarts
before blocking.
−ON/OFF external contact
−Change season from external contact
For further information please refer to user manual.
- terminals for REMOTE PANEL,
- spring type control circuit terminal board,
- outdoor electric board with double door and
gaskets,
- electronic controller,
- evaporator pump and recovery pump control
consent relay
- all numbered cables.
DOORBLOCK DISCONNECTING SWITCH
IT is possible to access the electrical panel by di-
sconnecting the voltage, then using the opening
lever of the panel itself. This lever can be blocked
with one or more padlocks during maintenance,
in order to prevent the machine being powered
up accidentally.
REMOTE CONTROL PANEL PR3
This allows the chiller command operations to
be given from a distance. compressor protection
thermomagnetic switch; fan protection thermo-
magnetic switch; auxiliary protection thermoma-
gnetic switch;
discharge gas temperature control thermostat
CONTROL KEYPAD
Provides full control functions. For a detailed
description refer to the user manual.

12 Aermec 13_01. 5641300_00
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6. ACCESSORIES
6.1. MECHANICAL ACCESSORIES
VT
Group of anti-vibration, to be installed under the base.
GP
Protection grille, protects the external coil from acci-
dental knocks.
6.2. ELECTRICAL ACCESORIES
AERWEB300
Accessory AERWEB allows remote control of a chiller
through a common PC and an ethernet connection
over a common browser; 4 versions available:
- AERWEB300-6: Web server to monitor and remote
control max. 6 units in RS485 network;
- AERWEB300-18: Web server to monitor and remote
control max. 18 units in RS485 network;
AERWEB300-6G: Web server to monitor and remote
control max. 6 units in RS485 network with integrated
GPRS modem;
AERWEB300-18G: Web server to monitor and remote
control max. 18 units in RS485 network with integrated
GPRS modem;
AER485
RS-485 interface for supervision systems with MODBUS
protocol.
DRE
It allows the reduction of peak power necessary for the
machine during start-up phase.
Accessories can only be fitted in the factory.
DUALCHILLER
Simplified control system to switch on and off, and
command, two chillers (using Aermec GR3 command) in
a single system, as if they were a single unit.
MULTICHILLER
Control system to switch the individual chillers on and
off, and command them, in a system in which several
units are installed in parallel, always ensuring a constant
delivery to the evaporators.
PGS: Daily/Weekly Programmer.
Allows you to programme two time bands per day
(two switch on/off cycles) and to have differentiated
programming for each day of the week.
PRM1-PRM2 FACTORY FITTED ACCESSORY. It is a
manual pressure switch electrically wired in series with
the existing automatic high pressure switch on the
compressor discharge pipe.
Compatibility with the VMF system.
For further system information please refer to the
specific documentation.
For more information please contact us

13Aermec 13_01. 5641300_00
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7. TECHNICAL DATA
7.1. TECHNICAL DATA VERSION "A E"
Models 0280 0300 0330 0350 0500 0550 0600 0650 0700 0750
Cooling capacity AAlls Tons - - - - 25,51 30,14 37,16 41,74 46,86 49,90
EAlls tons 13,71 16,01 18,40 23,52 - - - - - -
Total power input AAlls kW - - - - 31,00 36,50 44,30 50,90 56,80 61,20
EAlls kW 16,10 18,70 21,50 27,80 - - - - - -
Total power input
with LOW - PUMP
A230V|460V kW - - - - 32,84 38,34 46,50 53,10 59,80 64,20
E230V|460V kW 17,51 20,11 22,91 29,21 - - - - - -
Total power input
with LOW - PUMP
A575V kW ----32,10 37,60 46,50 53,10 59,80 64,20
E575V kW 17,20 19,80 22,60 28,9 ------
Total power input
with HIGH - PUMP
A230V|460V kW ----34,20 39,70 47,30 53,90 59,80 65,20
E230V|460V kW 18,45 21,05 23,85 30,15 - - - - - -
Total power input
with HIGH - PUMP
A575V kW - - - - 33,2 38,7 47,3 53,9 59,8 65,2
E575V kW 17,6 20,2 23,0 29,3 - - - - - -
Water flow AAlls gpm - - - - 61 72 89 100 112 120
EAlls gpm 33 38 44 56 - - - - - -
Total pressure drops AAlls p.s.i. ---- 5 589910
EAlls p.s.i. 4446 - - -- - -
Useful head
with LOW - PUMP
A230V|460V p.s.i. - - - - 21 19 19 17 16 15
E230V|460V p.s.i. 19 19 19 15 - - - - - -
Useful head
with HIGH - PUMP
A230V|460V p.s.i. - - - - 35 33 30 28 27 32
E230V|460V p.s.i. 29 29 29 25 - - - - - -
Useful head
with LOW - PUMP
A575V p.s.i. - - - - 16 13 19 17 16 15
E575V p.s.i. 23 22 21 17 - - - - - -
Useful head
with HIGH - PUMP
A575V p.s.i. - - - - 25 24 30 28 27 32
E575V p.s.i. 29 29 28 24 - - - - - -
ENERGETIC INDEX
EER AAlls BTU/h/W - - - - 9,88 9,92 10,08 9,85 9,91 9,79
EAlls BTU/h/W 10,22 10,28 10,28 10,14 - - - - - -
IPLV -Alls BTU/h/W 13,42 13,42 13,46 13,42 14,72 14,86 15,51 15,06 14,65 14,21
PROTECTION RATING
IP 24 24 24 24 24 24 24 24 24 24
ELECTRICAL DATA
Alimentation V/ph/Hz 230V|460V/3/60Hz
Total input current (1)
A230V A - - - - 97,6 112,3 139,0 157,4 174,4 189,6
E230V A 53,70 60,9 69,50 87,50 - - - - - -
A460V A - - - - 49,3 56,9 71,1 78,9 85,6 94,9
E460V A 30,50 34,1 39,60 46,7 - - - - - -
MODELS WITHOUT PUMP
L.R.A.
A230V A ----
374 387 370 451 491 536
E230V A 229 277 285 366 ------
A460V A ---- 188 200 199 229 239 272
E460V A 121 148 154 184 ------
M.C.A.
A230V A - - - - 146 159 177 222 262 274
E230V A 76 84 93 138 - - - - - -
A460V A - - - - 70 81 99 110 120 129
E460V A 39 48 54 65 - - - - - -
M.O.P.
A230V A - - - - 203 216 215 280 320 336
E230V A 107 121 130 195 - - - - - -
A460V A 95 106 119 135 145 159
E460V A 53 68 74 90 - - - - - -
TECHNICAL DATA
"AE" VERSION
TECHNICAL DATA "H" VERSIONTECHNICAL DATA "C" VERSION
COOLING (AHRI CONDITIONS)
Outlet water temperature 6,7°C / 44,06°F
Flow rate 0,043l/s per kW
External temperature 35°C / 95°F
(1) data refered no pump version
AHRI conditions: leaving water 6,7°C / 44,06°F
flow rate 0,043 l/s per kW (full load)
Load 100% air 35°C / 95°F
Load 75% air 26,7°C / 80°F
Load 50% air 18,3°C / 65°F
Load 25% air 12,8°C / 55°F

14 Aermec 13_01. 5641300_00
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Models 0280 0300 0330 0350 0500 0550 0600 0650 0700 0750
MODELS WITH LOW PUMP
L.R.A.
A230V A - - - - 373 421 425 479 493 540
E230V A 245 311 324 378 - - - - - -
A460V A - - - - 194 210 219 238 245 292
E460V A 121 168 174 193 - - - - - -
M.C.A.
A230V A - - - - 160 167 213 225 239 256
E230V A 80 99 112 124 - - - - - -
A460V A - - - - 78 812 103 110 117 129
E460V A 41525865 - - - - - -
M.O.P.
A230V A - - - - 200 200 250 250 250 300
E230V A 110 125 150 150 - - - - - -
A460V A - - - - 90 100 110 125 125 150
E460V A 50607580 - - - - - -
Alimentation V/ph/Hz 575V/3/60Hz
Total input current (1) A575V A - - - - 39,9 46,2 57,7 64,7 70,9 77,8
E575V A 25,3 28,4 33,5 40,1 - - - - - -
MODELS WITHOUT PUMP
L.R.A. A575V A- - - - 139 146 135 171 187 214
E575V A94 98 101 138 - - - - - -
M.C.A. A575V A- - - - 57 65 72 90 106 115
E575V A30 36 39 57 - - - - - -
M.O.P. A575V A- - - - 80 87 87 112 128 142
E575V A40 50 53 79 - - - - - -
MODELS WITH LOW PUMP
L.R.A. A575V A- - - - 140 148 138 174 191 218
E575V A96 99 103 140 - - - - - -
M.C.A. A575V A- - - - 59 66 75 93 110 119
E575V A31 37 41 58 - - - - - -
M.O.P. A575V A- - - - 81 88 90 115 132 146
E575V A42 51 55 81 - - - - - -
MODELS WITH HIGH PUMP
L.R.A. A575V A- - - - 142 149 139 175 191 220
E575V A96 100 103 140 - - - - - -
M.C.A. A575V A- - - - 61 68 76 94 110 121
E575V A32 38 41 59 - - - - - -
M.O.P. A575V A- - - - 83 90 91 116 132 147
E575V A43 52 56 81 - - - - - -
SCROLL COMPRESSOR
Quantity / circuits n°/n° 2/2 2/2 2/2 2/2 3/2 3/2 4/2 4/2 4/2 4/2
SYSTEM SIDE EXCHANGER
Exchanger capacity A / E gal 1,1 1,3 1,7 1,7 2,2 2,9 2,9 3,4 4,8 3,7
Hydraulic connection (victaulic) Ø 2”1/2 2”1/2 2”1/2 2”1/2 2”1/2 2”1/2 2”1/2 2”1/2 2”1/2 3”
COOLING (AHRI CONDITIONS)
Outlet water temperature 6,7°C / 44,06°F
Flow rate 0,043l/s per kW
External temperature 35°C / 95°F
(1) data refered no pump version
AHRI conditions: leaving water 6,7°C / 44,06°F
flow rate 0,043 l/s per kW (full load)
Load 100% air 35°C / 95°F
Load 75% air 26,7°C / 80°F
Load 50% air 18,3°C / 65°F
Load 25% air 12,8°C / 55°F

15Aermec 13_01. 5641300_00
NRL 0280-0750 60Hz
EN
Models 0280 0300 0330 0350 0500 0550 0600 0650 0700 0750
HYDRONIC KIT SYSTEM SIDE
STORAGE TANK
Storage tank capacity A/E/HA/HE l 300 300 300 300 500 500 500 500 500 700
Storage tank capacity A/E/HA/HE gal 79 79 79 79 132 132 132 132 132 184,8
EXPANSION VASSEL
Expansion vassel n°/gal 1 / 6.60 1 / 6.60 1 /6.60 1 /6.60 1 /6.60 1 /6.60 1 /6.60 1 /6.60 1 /6.60 1 /6.60
Expansion vassel calibration p.s.i. 21 21 21 21 21 21 21 21 21 21
SAFETY VALVE
Safety valve n°/bar 1/6 1/6 1/6 1/6 1/6 1/6 1/6 1/6 1/6 1/6
AXIAL STANDARD FAN
Quantity n° 6 6 8 8 2 2 3 3 3 3
Air flow cfm 13570 14632 18408 17422 23600 23246 36344 36344 35164 35754
Input current
230V A
6,96 6,96 9,28 9,28
13,0 13,0 19,5 19,5 19,5 19,5
460V A 7,6 7,6 11,4 11,4 11,4 11,4
575V A 6,64 6,64 9,96 9,96 9,96 9,96
Input power 230V|460V kW 1,56 1,56 2,08 2,08 4,0 4,0 6,0 6,0 6,0 6,0
575V kW 1,56 1,56 2,08 2,08 4,36 4,36 6,54 6,54 6,54 6,54
SOUND DATA
Sound pressure A dB(A) - - - - 51 52 53 54 54 54
E dB(A) 42 43 45 46 - - - - - -
Sound power A dB(A) - - - - 83 84 85 86 86 86
E dB(A) 74 75 77 78 - - - - - -
CHARGES the reported data can be amended any time aermec considers it necessary
Refrigerant R410A
A/E C1 Kg
lb
6,6
14,55
8,6
18,96
8,5
18,74
12,3
27,12
12,5
27,56
16,6
36,60
18,0
39,68
18,0
39,68
23,8
52,47
24,0
52,91
A/E C2 Kg
lb
6,6
14,55
8,6
18,96
8,5
18,74
12,3
27,12
12,5
27,56
16,6
36,60
18,0
39,68
18,0
39,68
23,8
52,47
25,5
56,22
Oil
A/E C1 Kg
lb
1,8
3,96
3,4
7,49
3,4
7,49
3,4
7,49
3,6
7,93
6,8
8,37
6,8
8,37
6,8
8,37
6,8
8,37
6,8
8,37
A/E C2 Kg
lb
1,8
3,96
1,8
3,96
3,4
7,49
3,4
7,49
3,4
7,49
3,4
7,49
6,8
8,37
6,8
8,37
6,8
8,37
6,8
8,37
DIMENSION WEIGHT
Height A-E - in 63 63 63 63 74 74 74 74 74 78
Width A-E - in 43 43 43 43 43 43 43 43 43 59
Depth A-E - in 96 116 116 116 116 116 156 156 156 171
Weight A-E - Kg
lb
635
1402
702
1548
710
1567
776
1711
848
1870
941
2075
1099
2425
1109
2447
1109
2447
1619
3571
Sound power
Aermec determines sound power values in agreement with the
9614-2 Standard.
Sound Pressure
Sound pressure measured in free field conditions with reflec-
tive surface (directivity factor Q=2) at 394 in/10mt distance
from external surface of unit, in compliance with ISO 3744
regulations.

16 Aermec 13_01. 5641300_00
NRL 0280-0750 60Hz
EN
Model 0280 0300 0330 0350 0500 0550 0600 0650 0700 0750
Cooling capacity HA Alls Tons - - - - 24,85 28,95 35,15 40,78 45,13 49,56
HE Alls tons 13,05 15,44 17,54 22,15 - - - - - -
Total power input HA Alls kW - - - - 30,10 36,10 42,80 49,40 55,80 60,70
HE Alls kW 15,60 18,10 20,80 26,80 - - - - - -
Total power input
with LOW PUMP
HA 230V|460V kW - - - - 31,94 37,94 45,0 51,6 58,8 63,7
HE 230V|460V kW 17,01 19,51 22,21 28,21 - - - - - -
Total power input
with HIGH PUMP
HA 230V|460V kW - - - - 31,95 39,30 45,80 52,40 58,80 64,70
HE 230V|460V kW 17,95 20,45 23,15 29,15 - - - - - -
Total power input
with LOW - PUMP
HA 575V kW - - - - 31,20 37,20 45,00 51,60 58,80 63,70
HE 575V kW 16,70 19,20 21,90 27,90 - - - - - -
Total power input
with HIGH - PUMP
HA 575V kW - - - - 31,60 38,30 45,80 52,40 58,80 64,70
HE 575V kW 17,10 19,60 22,30 28,30 - - - - - -
Water flow HA Alls gpm - - - - 60 69 84 98 108 119
HE Alls gpm 31 37 42 53 - - - - - -
Total pressure drops HA Alls p.s.i. - - - - 3 4 5 7 8 9
HE Alls p.s.i. 2 3 2 3 - - - - - -
Useful head
with LOW - PUMP
HA 230V|460V p.s.i. - - - - 23 21 22 19 17 16
HE 230V|460V p.s.i. 22 20 20 19 - - - - - -
Useful head
with HIGH - PUMP
HA 230V|460V p.s.i. - - - - 37 35 34 31 28 34
HE 230V|460V p.s.i. 29 29 29 25 - - - - - -
Useful head
with LOW - PUMP
HA 575V p.s.i. - - - - 18 15 22 19 17 16
HE 575V p.s.i. 25 24 23 20 - - - - - -
Useful head
with HIGH - PUMP
HA 575V p.s.i. - - - - 27 25 34 31 28 34
HE 575V p.s.i. 32 30 30 27 - - - - - -
Heating capacity HA Alls BTU/h - - - - 310778 358582 430885 481999 549901 600571
HE Alls BTU/h 165967 196710 220561 267341 - - - - - -
Total power input HA Alls kW - - - - 31,48 37,69 44,70 51,04 58,10 61,35
HE Alls kW 16,08 19,08 21,39 28,45 - - - - - -
Total power input
with LOW PUMP
HA 230V|460V kW - - - - 33,32 39,53 46,90 53,24 61,10 64,35
HE 230V|460V kW 17,49 20,49 22,80 29,86 - - - - - -
Total power input
with HIGH PUMP
HA 230V|460V kW - - - - 33,33 40,89 47,70 54,04 61,10 65,35
HE 230V|460V kW 18,43 21,43 23,74 30,80 - - - - - -
Total power input
with LOW PUMP
HA 575V kW - - - - 32,58 38,79 46,90 53,24 61,10 64,35
HE 575V kW 17,18 20,18 22,49 29,55 - - - - - -
Total power input
with HIGH PUMP
HA 575V kW - - - - 32,98 39,89 47,70 54,04 61,10 65,35
HE 575V kW 17,58 20,58 22,89 29,95 - - - - - -
Water flow HA Alls gpm - - - - 69 80 96 107 122 133
HE Alls gpm 37 44 49 59 - - - - - -
Total pressure drops HA Alls p.s.i. - - - - 4 4 6 7 10 10
HE Alls p.s.i. 2 3 3 3 - - - - - -
Useful head
with LOW - PUMP
HA 230V|460V p.s.i. - - - - 21 19 19 17 14 12
HE 230V|460V p.s.i. 21 19 19 17 - - - - - -
Useful head
with HIGH - PUMP
HA 230V|460V p.s.i. - - - - 35 32 33 31 26 28
HE 230V|460V p.s.i. 30 29 29 27 - - - - - -
Useful head
with LOW - PUMP
HA 575V p.s.i. - - - - 15 11 19 17 14 12
HE 575V p.s.i. 24 21 21 18 - - - - - -
Useful head
with HIGH - PUMP
HA 575V p.s.i. - - - - 25 23 33 31 26 28
HE 575V p.s.i. 30 28 28 25 - - - - - -
ENERGETIC INDEX
EER HA Alls BTU/h/W - - - - 9,92 9,63 9,86 9,91 9,71 9,81
HE Alls BTU/h/W 10,05 10,25 10,13 9,93 - - - - -
COP HA Alls W/W - - - - 2,89 2,79 2,83 2,77 2,77 2,87
HE Alls W/W 3,03 3,02 3,02 2,75 - - - - - -
IPLV -Alls BTU/h/W 13,32 13,42 13,39 13,22 14,75 14,45 15,27 15,16 14,34 14,21
8. TECHNICAL DATA "HA - HE" VERSION
HEATING (AHRI CONDITIONS)
Inlet water temperature 40°C / 104 °F
Outlet water temperature 45°C / 113 °F
External air temperature 7°C b.s / 6°C b.u.
COOLING (AHRI CONDITIONS)
Outlet water temperature 6,7°C / 44,06°F
Flow rate 0,043l/s per kW
External temperature 35°C / 95°F
(1) data refered no pump version
AHRI conditions: leaving water 6,7°C / 44,06°F
flow rate 0,043 l/s per kW (full load)
Load 100% air 35°C / 95°F
Load 75% air 26,7°C / 80°F
Load 50% air 18,3°C / 65°F
Load 25% air 12,8°C / 55°F

17Aermec 13_01. 5641300_00
NRL 0280-0750 60Hz
EN
Model 0280 0300 0330 0350 0500 0550 0600 0650 0700 0750
PROTECTION RATING
IP Alls - 24 24 24 24 24 24 24 24 24 24
ELETTRICAL DATA
Alimentation V/ph/Hz 230V|460V/3/60
Total input current in cooling mode (1)
HA 230V A - - - - 95,9 111,8 135,4 154,3 172,6 191,0
HE 230V A 52,8 60,8 67,9 85,5 - - - - - -
HA 460V A - - - - 48,5 56,4 69,7 77,4 84,8 96,2
HE 460V A 30,1 35,2 38,7 45,8 - - - - - -
Total input current in heathing mode (1)
HA 230V A - - - - 92,8 111,5 132,2 152,2 160,4 173,7
HE 230V A 47,0 61,2 60,0 90,4 - - - - - -
HA 460V A - - - - 46,4 55,7 66,0 76,1 80,0 87,2
HE 460V A 22,3 30,6 28,6 45,2 - - - - - -
Model WITHOUT PUMP
L.R.A.
HA 230V A - - - - 374 387 370 451 491 542
HE 230V A 229 279 285 366 - - - - - -
HA 460V A - - - - 188 200 199 229 239 276
HE 460V A 121 148 154 184 - - - - - -
M.C.A.
HA 230V A - - - - 146 159 177 222 262 280
HE 230V A 76 86 93 138 - - - - - -
HA 460V A - - - - 70 81 99 110 120 133
HE 460V A 39 48 54 65 - - - - - -
M.O.P.
HA 230V A - - - - 203 216 215 280 320 342
HE 230V A 107 124 130 195 - - - - - -
HA 460V A - - - - 95 106 119 135 145 163
HE 460V A 53 68 74 90 - - - - - -
Model WITH LOW PUMP
L.R.A.
HA 230V A - - - - 382 395 378 459 501 552
HE 230V A 234 285 291 372 - - - - - -
HA 460V A - - - - 193 204 203 233 244 277
HE 460V A 124 151 157 187 - - - - - -
M.C.A.
HA 230V A - - - - 153 166 185 230 272 290
HE 230V A 82 92 98 143 - - - - - -
HA 460V A - - - - 74 85 103 114 125 134
HE 460V A 42 51 57 68 - - - - - -
M.O.P.
HA 230V A - - - - 211 223 222 287 330 352
HE 230V A 112 129 136 201 - - - - - -
HA 460V A - - - - 99 110 123 139 150 164
HE 460V A 56 71 77 93 - - - - - -
Model WITH HIGH PUMP
L.R.A.
HA 230V A -- - - 382 395 380 461 501 549
HE 230V A 236 284 293 374 - - - - - -
HA 460V A - - - - 192 204 204 234 244 278
HE 460V A 126 153 158 188 - - - - - -
M.C.A.
HA 230V A - - - - 154 167 187 232 272 287
HE 230V A 84 92 101 146 - - - - - -
HA 460V A - - - - 74 85 104 115 125 136
HE 460V A 44 53 58 70 - - - - - -
M.O.P.
HA 230V A - - - - 211 224 225 290 330 349
HE 230V A 115 129 138 203 - - - - - -
HA 460V A - - - - 99 110 124 140 150 165
HE 460V A 58 73 78 95 - - - - - -
HEATING (AHRI CONDITIONS)
Inlet water temperature 40°C / 104 °F
Outlet water temperature 45°C / 113 °F
External air temperature 7°C b.s / 6°C b.u.
COOLING (AHRI CONDITIONS)
Outlet water temperature 6,7°C / 44,06°F
Flow rate 0,043l/s per kW
External temperature 35°C / 95°F
(1) data refered no pump version
AHRI conditions: leaving water 6,7°C / 44,06°F
flow rate 0,043 l/s per kW (full load)
Load 100% air 35°C / 95°F
Load 75% air 26,7°C / 80°F
Load 50% air 18,3°C / 65°F
Load 25% air 12,8°C / 55°F

18 Aermec 13_01. 5641300_00
NRL 0280-0750 60Hz
EN
Model 0280 0300 0330 0350 0500 0550 0600 0650 0700 0750
Alimentation V/ph/Hz 575V/3/60
Total input current in cooling mode (1) HA 575V A - - - - 39,3 46,0 56,5 63,5 70,2 79,1
HE 575V A 25,0 29,8 32,8 39,3 - - - - - -
Total input current in heathing mode (1)
HA 575V A - - - - 37,1 43,9 53,6 61,6 64,9 74,7
HE 575V A 21,7 24,5 27,3 36,1 - - - - - -
Model WITHOUT PUMP
L.R.A. HA 575V A - - - - 139 146 135 171 187 218
HE 575V A 94 98 101 138 - - - - - -
M.C.A. HA 575V A - - - - 57 65 72 90 106 119
HE 575V A 30 36 39 57 - - - - - -
M.O.P. HA 575V A - - - - 80 87 87 112 128 145
HE 575V A 40 50 53 79 - - - - - -
MODELS WITH LOW PUMP
L.R.A. HA 575V A - - - - 140 148 138 174 191 222
HE 575V A 96 99 103 140 - - - -
M.C.A. HA 575V A - - - - 59 66 75 93 110 123
HE 575V A 31 37 41 58 - - - - - -
M.O.P. HA 575V A - - - - 81 88 90 115 132 149
HE 575V A 42 51 55 81 - - - - - -
MODELS WITH HIGH PUMP
L.R.A. HA 575V A - - - - 142 149 139 175 191 223
HE 575V A 96 100 103 140 - - - - - -
M.C.A. HA 575V A - - - - 61 68 76 94 110 124
HE 575V A 32 38 41 59 - - - - - -
M.O.P. HA 575V A - - - - 83 90 91 116 132 150
HE 575V A 43 52 56 81 - - - - - -
SCROLL COMPRESSOR
Quantity / circuits n°/n° 2/2 2/2 2/2 2/2 3/2 3/2 4/2 4/2 4/2 4/2
SYSTEM SIDE EXCHANGER
Exchanger capacity HA-HE gal 1,7 1,7 2,2 2,9 3,4 4,1 4,1 4,8 4,8 4,4
Hydraulic connection (victaulic) Ø 2”1/2 2”1/2 2”1/2 2”1/2 2”1/2 2”1/2 2”1/2 2”1/2 2”1/2 3”
HEATING (AHRI CONDITIONS)
Inlet water temperature 40°C / 104 °F
Outlet water temperature 45°C / 113 °F
External air temperature 7°C b.s / 6°C b.u.
COOLING (AHRI CONDITIONS)
Outlet water temperature 6,7°C / 44,06°F
Flow rate 0,043l/s per kW
External temperature 35°C / 95°F
(1) data refered no pump version
AHRI conditions: leaving water 6,7°C / 44,06°F
flow rate 0,043 l/s per kW (full load)
Load 100% air 35°C / 95°F
Load 75% air 26,7°C / 80°F
Load 50% air 18,3°C / 65°F
Load 25% air 12,8°C / 55°F

19Aermec 13_01. 5641300_00
NRL 0280-0750 60Hz
EN
Model 0280 0300 0330 0350 0500 0550 0600 0650 0700 0750
HYDRONIC KIT SYSTEM SIDE
STORAGE TANK
Storage tank All l 300 300 300 300 500 500 TO BE DEFINED
EXPANSION VASSEL
Expansion vassel All n°/gal 1 / 6.60 1 / 6.60 1 / 6.60 1 / 6.60 1 / 6.60 1 / 6.60 1 / 6.60 1 / 6.60 1 / 6.60 1 / 6.60
Expansion vassel calibration All p.s.i. 21 21 21 21 21 21 21 21 21 21
SAFETY VALVE
Safety valve All n°/p.s.i. 1/87 1/87 1/87 1/87 1/87 1/87 1/87 1/87 1/87 1/87
STANDARD AXIAL FAN
Quantity n° 6 8 8 8 2 2 3 3 3 4
Air flow cfm 14632 19352 19352 18762 25016 25016 37760 37760 37760 51330
Input current
HA 230V A
6,96 9,28 9,28 9,28
13,0 13,0 19,5 19,5 19,5 26,0
HE 460V A 7,6 7,6 11,4 11,4 11,4 15,2
575V A 6,64 6,64 9,96 9,96 9,96 13,28
Input power 230V|460V kW 1,56 2,08 2,08 2,08 4,0 4,0 6,0 6,0 6,0 8,0
575V kW 1,56 2,08 2,08 2,08 4,36 4,36 6,54 6,54 6,54 8,72
SOUND DATA
COOLING FUNCTIONING
Sound pressure HA dB(A) - - - - 51 52 53 54 54 55
HE dB(A) 42 43 45 46 43 44 45 46 46 47
Sound power HA dB(A) - - - - 83 84 85 86 86 87
HE dB(A) 74 76 77 78 75 75 77 78 78 79
HEATING FUNCTIONING
Sound pressure ALL dB(A) 42 44 45 46 51 52 53 54 54 55
Sound power ALL dB(A) 74 76 77 78 83 84 85 86 86 87
CHARGE THE DATA REPORTED CAN BE CHANGED AT ANY TIME IF DEEMED NECESSARY FROM AERMEC
Refrigerant R410A
HA C1 kg
lb
12,1
26,68
15,0
33,7
15,0
33,7
17,5
38,58
17,0
38,48
17,5
34,14
26,0
57,32
26,0
57,32
26,0
57,32
44,0
97
HE C2 kg
lb
12,1
26,68
15,0
33,7
15,0
33,7
17,5
38,58
15,5
34,17
15,5
34,17
26,0
57,32
26,0
57,32
26,0
57,32
44,0
97
Oil
HA
HE C1 kg lb
1,8
3,96
3,4
7,49
3,4
7,49
3,4
7,49
3,6
7,93
6,8
8,37
6,8
8,37
6,8
8,37
6,8
8,37
6,8
8,37
HA
HE C2 Kg lb
1,8
3,96
1,8
3,96
3,4
7,49
3,4
7,49
3,4
7,49
3,4
7,49
6,8
8,37
6,8
8,37
6,8
8,37
6,8
8,37
DIMENSION WEIGHT
Height - in 63 63 63 63 74 74 74 74 74 78
Width - in 43 43 43 43 43 43 43 43 43 59
Depth - in 96 116 116 116 116 116 156 156 156 171
Peso - Kg
lb
721
1590
801
1766
805
1775
884
1949
988
2180
1006
2220
1299
2866
1359
2998
1329
2932
2060
4542
Sound power
Aermec determines sound power values in agreement with the
9614-2 Standard.
Sound Pressure
Sound pressure measured in free field conditions with reflec-
tive surface (directivity factor Q=2) at 394 in/10mt distance
from external surface of unit, in compliance with ISO 3744
regulations.

20 Aermec 13_01. 5641300_00
NRL 0280-0750 60Hz
EN
9. OPERATION LIMIT
9.1. COOLING MODE ¹
9.2. HEATING MODE ¹
External air temperature b.s.
Temperature of the water
produced CONDENSER
The units, in standard configuration, are not suitable
for installation in salty environments. For functioning li-
mits, please refer to the diagrams below, valid for AHRI
standard conditions.
Wind breaks should be implemented if the unit is
installed in particularly windy areas, to prevent a
malfunction of the unit.
External air temperature b.s.
Temperature of the water produced EVAPORATOR
5
14
23
32
41
50
59
68
77
86
95
104
113 114,8 °F
46 °C
36 °C
96,8 °F
122
-15
-10
-5
0
5
10
15
20
25
30
35
40
45
50
°C
°C
°F
°F
-6 -7 -8 -5 -4 -3 -2 -1
0 1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20
17,6 19,4 21,2 23,0 24,8 26,6 28,4 30,2 32,0 33,8 35,6 37,4 39,2 41,0 42,8 44,6 46,4 48,2 50,0 51,8 53,6 55,4 57,2 59,0 60,8 62,6 64,4 66,2 68,0
Thermostac valve °
Thermostac valve Y
Thermostac valve X
STANDARD
STANDARD
functioning
functioning
Functioning with
Functioning with
accessory
accessory
DCPX
DCPX
Functioning with
Functioning with
glycoled water
glycoled water
Functioning with
Functioning with
DCPX
DCPX
accessory +
accessory +
water glycoled
water glycoled
25
20
15
30
35
40
45
50
55
60
-10-15-20 -5 0 5 10 15 20 25 30 35 40 45 50 °C
°C
°F
°F
145-4 23 32 41 50 59
59
68
68
77
77
86
86
95
95
104
104
113
113
122
122
131
140
42 °C
107,6 °F
-15 °C
5 °F
55 °C 131 °F
STANDARD
STANDARD
functioning
functioning
Functioning
Functioning
with DCPX
with DCPX
(accessory)
(accessory)
REFRIGERANT SIDE High pressure
side
Low pressure
side
Acceptable maximum pressure bar/PSI 45/653 30/435
Acceptable maximum temperature °C / °F 120 / 248 51 / 131
Acceptable minimum temperature °C / °F -30 / -22 -30 / -22
WATER SIDE
Acceptable maximum pressure bar/PSI 6/87
9.3. PROJECT DATA
ATTENTION
Contact our technical sales depart-
ment if the unit needs to operated
outside the operating limits.
ATTENTION
If the unit is installed in particu-
larly windy areas, we recommend
providing for windbreak to avoid
malfunctioning of the DCPX_UL
device.
Note:
1 - In summer mode the unit can be started
with external air 46°C/114,8°F and water inlet
35°C/95°F. In winter mode the unit can be started
with external air -15°C/5°F and water inlet
20°C/68°F. Operate in such condions is permit-
ted only for a short me and to bring the system
up to temperature. To reduce the me of this
operaon, it is recommended to install a three-
way valve that allows bypassing water from the
system ulies, unl the condions that allow
the unit to work within the permied operaon
limits are achieved.
Hydarulic circuit safety valve
(only in version with storage tank or with pump)
Calibrated at 6/87 bar/PSI and with piped discharge, which intervents
by discharging overpressure if abnormal work pressure occur.