AERMEC NLC H User manual


IT
EN
FR DE ES

Air/Water


0280/1250
15.07 4037315_01

Dear Customer,
Thank you for choosing an AERMEC product. This product is the result of many years of
experience and in-depth engineering research, and it is built using top quality materials
and advanced technologies.
We constantly monitor the quality level, and as a result AERMEC products are synonymous
with Safety, Quality, and Reliability.
Aermec reserves the right to make all modification deemed necessary for improving the
product at any time with any modification of technical data.
Thank you again.
AERMEC S.p.A

Indice
1. General warnings for the installer............................................................................................................ 5
2. Selection and place of installation ........................................................................................................... 6
3. Positioning................................................................................................................................................ 6
4. Minimum technical clearances................................................................................................................. 6
5. Operation of the nlc unit.......................................................................................................................... 6
6. Max static useful pressure of the fans..................................................................................................... 7
7. Main hydraulic circuits ............................................................................................................................. 9
8. Electrical wirings .................................................................................................................................... 12
9. Electrical data table................................................................................................................................ 14
10. Electronic legislation (pCO5).................................................................................................................. 15
11. Loading the system................................................................................................................................. 21
12. System discharge.................................................................................................................................... 21
13. Draining the machine............................................................................................................................. 21
14. Control and first start-up........................................................................................................................ 22
15. Calibration of control and safety parameters......................................................................................... 23
16. Routine maintenance ................................................................................................................................. 24
17. Extraordinary maintenance.................................................................................................................... 24
18. Troubleshooting ..................................................................................................................................... 25
19. Lifting points and antivibrant position ................................................................................................... 26
20. Weight distribution and percentage on the supports (empty weight)................................................... 31
21. Information regarding dimensions and hydraulic connections .............................................................. 35
22. Distributors............................................................................................................................................. 58

EN - 5
NLC
NLC_HA/HE cod: 4037315_01
 
The NLC AERMEC units are constructed according to the recognised
technical standards and safety regulations. They have been designed for air
conditioning and domestic hot water production (DHW) and must be used
for this purpose in accordance with their technical features. The company
shall not be contractually or non-contractually liable for any damage to
people, animals or objects, for failures caused by errors during installation,
adjustment and maintenance or incorrect use. All the uses not expressly
indicated in this manual are not allowed.

Deliver the following instructions plus all the complementary documentation
to the system user, who shall be responsible for keeping the instructions so
that they are always available when needed.
Read carefully this chapter; all the procedures must be carried out by
qualified personnel according to the regulations in force in the various
countries.
The warranty of the device does not in any case cover costs incurred as a
result of motorised ladders, scaffolding or any other lifting systems made
necessary to carry out the operations under warranty.
Do not modify or tamper with the appliance as dangerous situations may
be created and the manufacturer will not be liable for any damage caused.
The warranty shall not be valid if the indications mentioned above are not
observed.

The appliance must be installed by an authorised and qualified technician,
in compliance with the national legislation in force in the country of
destination.
Aermec shall not be held responsible for any damage whatsoever resulting
from the non-compliance with these instructions.
Before starting any kind of work, it is necessary TO READ CAREFULLY THE
INSTRUCTIONS, AND TO PERFORM THE SAFETY CHECKS TO REDUCE ALL
HAZARDS TO A MINIMUM. All the personnel in charge must be aware of
the operations and the risks that may arise when all the unit installation
operations begin.

The warranty of the device does not cover costs incurred as a result of
ladders, scaffolding or any other lifting systems made necessary to carry out
operations under warranty.
Do not modify or tamper with the chiller as this may cause dangerous
situations and the manufacturer will not be liable for any damage caused.
The warranty shall not be valid if the indications mentioned above are not
observed.

The unit must be installed by an authorised and qualified technician, in
compliance with the national legislation in force in the country of destination
(MD 329/2004). AERMEC shall not be held responsible for any damage
whatsoever resulting from the non-compliance with these instructions.
Before starting any work, it is necessary TO READ CAREFULLY THE
INSTRUCTIONS, AND TO PERFORM THE SAFETY CHECKS TO AVOID ANY
RISKS.
All the personnel in charge must be aware of the operations and the risks
that may arise when all the unit installation operations begin.

The units can be identified using:

- that includes the product identification data





IP20

This unit contains fluorinated greenhouse gases covered by the Kyoto
Protocol. Maintenance and disposal operations must be only carried out by
qualified personnel in compliance with the standards in force.
WARNING
The refrigerant circuit is pressurised. Work on the appliance can be carried
out only by an authorised ATS technician or by a qualified technician.

The chiller is delivered with the necessary amount of R410A refrigerant
for its operation. It is a chlorine-free refrigerant that does not damage
the ozone layer. R410A is not flammable. However, all the maintenance
operations must only be carried out by a specialised technician with the
suitable protection equipment

Before opening the chiller, the unit must be completely disconnected from
the mains power supply.

6 - EN
NLC
EN
NLC_HA/HE cod: 4037315_01
 
Before installing the unit, decide with the customer where it will be placed,
while paying attention to the following points:
• the support surface must be able to withstand the weight of the unit;
• the safety distance between the units and other equipment or
structures must be strictly respected so that the air in fans inlet and
outlet circulates freely.
• The unit must be installed by an authorised technician in compliance
with the national laws in the country of destination, respecting the
minimum technical spaces to allow maintenance.
 
Before handling the unit, check the lifting capacity of the machines used,
respecting the instructions on the packaging.
To handle the machine on horizontal surfaces, use a fork-lift or the like in
the most appropriate way, paying attention to the distribution of the weight
of the unit.
ATTENTION
The unit comes fixed on a pallet.
Use forklis for handling
Position the unit in the place indicated by the customer, placing, between
the base and the support, a rubber mattress (minimum 10 mm. thick) or
anti-vibration dampers (ACCESSORIES).
For more information, see the tables regarding dimensions
Fasten the unit by checking carefully that its on the same level; check that
easy access to the hydraulic and electric part is allowed.
 
500 mm
800 mm
800 mm
1000 mm
 
The chillers and the heat pumps of the NLC range are air-cooled machines
suitable for installing indoors. For this reason the air that crosses the coil
needs to be expelled from the utility room using suitable piping connected
to the machine itself.
The presence of the piping involves pressure drops that will need to be
overcome by the fan; the size of these losses depends on various factors like
the length of the pipe, the dimensions, complexity of the pipes, etc.
            
          
           


             



The number of revs is set indirectly through a parame-
ter expressed in volts, which can vary from 0 to 10V:
Volt




0 10
 


B
B
A
A

EN - 7
NLC
NLC_HA/HE cod: 4037315_01
Default
NLC-HA Total air
ow rate
ESP [Pa] Max ESP
[Pa]
0 50 100 120 150 200 250 300 350 400 450 500
Parameter fans max Volts [V]
0280 23000 7,3 7,5 7,8 7,9 8,1 8,3 8,6 8,8 9,1 9,4 9,6 9,9 520
0300 26500 8,2 8,5 8,7 8,8 8,9 9,2 9,4 9,7 9,9 10,1 - - 370
0330 25000 7,9 8,2 8,4 8,5 8,6 8,9 9,1 9,4 9,6 9,9 - - 420
0350 27500 8,5 8,8 9,0 9,1 9,3 9,5 9,8 10,0 - - - - 300
0550 42000 7,0 7,3 7,6 7,7 7,9 8,2 8,5 8,8 9,1 9,4 9,6 9,9 510
0600 47000 7,8 8,1 8,3 8,4 8,6 8,9 9,1 9,4 9,7 9,9 - - 410
0650 44000 7,4 7,7 8,0 8,1 8,3 8,6 8,8 9,1 9,4 9,7 9,9 - 460
0675 50000 8,2 8,5 8,7 8,8 9,0 9,3 9,6 9,8 - - - - 330
0700 53000 7,9 8,2 8,5 8,6 8,8 9,1 9,4 9,7 10,0 - - - 350
0750 64500 8,5 / 7,0 8,8 / 7,3 9 / 7,6 9,1 / 7,7 9,3 / 7,9 9,5 / 8,2 9,8 / 8,5 10 / 8,8 - - - - 300
0800 84000 7,0 7,3 7,6 7,7 7,9 8,2 8,5 8,8 9,1 9,4 9,6 9,9 510
0900 94000 7,8 8,1 8,3 8,4 8,6 8,9 9,1 9,4 9,7 9,9 - - 410
1000 88400 7,4 7,7 8,0 8,1 8,3 8,6 8,8 9,1 9,4 9,7 9,9 - 460
1100 102000 8,1 8,4 8,7 8,8 9,0 9,4 9,7 10,0 - - - - 300
1250 102000 8,1 8,4 8,7 8,8 9,0 9,4 9,7 10,0 - - - - 300
Default
NLC-HE
Total
air ow
rate
ESP [Pa] Max ESP
[Pa]
0 50 100 120 150 200 250 300 350 400 450 500 550 600
Parameter fans max Volts [V]
0280 17000 6,1 6,4 6,8 6,9 7,1 7,4 7,7 8,1 8,4 8,7 9,0 9,4 9,7 10,0 600
0300 19800 6,9 7,2 7,5 7,6 7,8 8,1 8,3 8,6 8,9 9,2 9,5 9,8 - - 540
0330 17200 6,3 6,6 6,9 7,0 7,2 7,5 7,8 8,1 8,4 8,8 9,1 9,4 9,7 10,0 600
0350 20600 7,3 7,5 7,8 7,9 8,1 8,3 8,6 8,9 9,1 9,4 9,7 9,9 - - 510
0550 30000 5,6 6,0 6,4 6,5 6,7 7,1 7,4 7,8 8,2 8,5 8,9 9,3 9,6 10,0 600
0600 35000 6,3 6,6 7,0 7,1 7,3 7,7 8,0 8,3 8,7 9,0 9,4 9,7 - - 540
0650 31400 5,8 6,2 6,6 6,7 6,9 7,3 7,6 8,0 8,4 8,7 9,1 9,4 9,8 - 580
0675 38200 6,8 7,1 7,5 7,6 7,8 8,1 8,4 8,8 9,1 9,4 9,7 - - - 490
0700 41000 7,3 7,5 7,8 7,9 8,1 8,3 8,6 8,9 9,1 9,4 9,7 9,9 - - 510
0750 48900 7,3 / 5,6 7,5 / 6 7,8 / 6,4 7,9 / 6,5 8,1 / 6,7 8,3 / 7,1 8,6 / 7,4 8,9 / 7,8 9,1 / 8,2 9,4 / 8,5 9,7 / 8,9 9,9 / 9,3 - - 510
0800 60000 5,6 6,0 6,4 6,5 6,7 7,1 7,4 7,8 8,2 8,5 8,9 9,3 9,6 10,0 600
0900 70800 6,3 6,6 7,0 7,1 7,3 7,7 8,0 8,3 8,7 9,0 9,4 9,7 - - 540
1000 64000 5,8 6,2 6,6 6,7 6,9 7,3 7,6 8,0 8,4 8,7 9,1 9,4 9,8 - 580
1100 77600 6,8 7,1 7,5 7,6 7,8 8,1 8,5 8,8 9,1 9,5 9,8 - - - 480
1250 88000 6,5 7,0 7,4 7,6 7,9 8,3 8,8 9,3 9,7 - - - - - 380
 
THESE TABLES LOOK INCORRECT FOR AIRFLOW AND STATIC PRESSURE.
PLEASE HAVE THIS CHANGED FOR NORTH AMERICA

8 - EN
NLC
EN
NLC_HA/HE cod: 4037315_01
B
B
A
A

EN - 9
NLC
NLC_HA/HE cod: 4037315_01
WARNING
The selection and installation of the components
outside the appliance is assigned, due to his
competence, to the installer who will have to
operate according to the rules of good practice
and in compliance with the regulations in force in
the country of destination.
The hydraulic piping for connection to the
appliance must be properly scaled for the actual
water flow rate required by the system when
operating. The water flow rate to the heat
exchanger must always be constant.
Clean the system carefully before connecting the
unit. This is done in order to eliminate possible
residues such as welding spatter, waste, rust
or any other impurity from the pipes. These
substances could deposit inside and cause the
appliance to malfunction. The connection pipes
must be properly supported so as not to burden
the appliance with their weight.


If the system is shut down during the winter, the
water in the heat exchanger could freeze, causing
irreparable damage to the exchanger itself.
To avoid the risk of freezing, there are three pos-
sible solutions:
     from the appli-
ance.
 , with a glycol per-
centage chosen on the basis of the minimum
external temperature envisaged.
 
In this case the heaters must always be pow-
ered for the entire winter period (machine in
standby).
NLC_H 0280 ÷ 1250
1
2
256 7
7
8
8
910 11
12 13
3
Accumulo
Water Tank
44
 

1 Plate heat exchanger
2 Water temperature sensor (IN/OUT)
3 Air drain valve (standard for size NLC0550-1250)
4 Safety valve (standard for size NLC0550-1250)


3 Air drain valve (only for size NLC0280-0350)
4 Safety valve (only for size NLC0280-0350)
5 Pump
6 Water filter (obligatory)
7 Anti-vibration joints
8 Pressure gauge
9 Flow switch (obligatory)
10 Expansion tank
11 Loading group
12 Electric heater
13 Shut-off valve
WARNING


 
The   allows any impurities in
the hydraulic circuits to be blocked and
eliminated; impurities that could reach the
heat exchanger and damage it.
It is ‘ OBLIGATORY to install the water filter
(not supplied) at a maximum of 1 m from the
cooling water inlet fitting.
The filter must have 

 
The has the task of making sure
that water is circulating in the unit.
If this is not the case, it shuts down the unit.
The unit does not start if the flow switch is not
wired to the panel and should be 

      


Characteriscs of the water
System: Chiller with plate heat exchanger
PH 7.5-9
Electrical conducvity 100-500μS/cm
Total hardness 4.5-8.5 dH
External air < 65°C
Oxygen content < 0.1 ppm
Maximum glycol content 0.5
Phosphates (PO4) < 2ppm
Manganese (Mn) < 0.05 ppm
Iron (Fe) < 0.3 ppm
Alkalinity (HCO3) 70 - 300 ppm
Chlorine ions (Cl-) < 50 ppm
Sulphate ions (SO4) < 50 ppm
Sulphide ion (S) none
Ammonium ions (NH4) none
Silica (SiO2) < 30ppm
Vers. U.M. 280 300 330 350 550 600 650 675 750 800 900 1000 1100 1250
Minimum water content
HAl/kW44444444444444
Minimum water content for process applicaons or operaon with low outdoor temperatures and low
load.
Outlet water temperature adjustment. Design ∆t less than 5°C.
HAl/kW88888888888888

10 - EN
NLC
EN
NLC_HA/HE cod: 4037315_01
WARNING
The selection and installation of the components
outside the appliance is assigned, due to his
competence, to the installer who will have to
operate according to the rules of good practice
and in compliance with the regulations in force in
the country of destination.
The hydraulic piping for connection to the
appliance must be properly scaled for the actual
water flow rate required by the system when
operating. The water flow rate to the heat
exchanger must always be constant.
Clean the system carefully before connecting the
unit. This is done in order to eliminate possible
residues such as welding spatter, waste, rust
or any other impurity from the pipes. These
substances could deposit inside and cause the
appliance to malfunction. The connection pipes
must be properly supported so as not to burden
the appliance with their weight.


If the system is shut down during the winter, the
water in the heat exchanger could freeze, causing
irreparable damage to the exchanger itself.
To avoid the risk of freezing, there are three pos-
sible solutions:
     from the appli-
ance.
 , with a glycol per-
centage chosen on the basis of the minimum
external temperature envisaged.
 
In this case the heaters must always be pow-
ered for the entire winter period (machine in
standby).
WARNING


 
The   allows any impurities in
the hydraulic circuits to be blocked and
eliminated; impurities that could reach the
heat exchanger and damage it.
It is ‘ OBLIGATORY to install the water filter
(not supplied) at a maximum of 1 m from the
cooling water inlet fitting.
The filter must have 

 
The has the task of making sure
that water is circulating in the unit.
If this is not the case, it shuts down the unit.
The unit does not start if the flow switch is not
wired to the panel and should be 

      


Characteriscs of the water
System: Chiller with plate heat exchanger
PH 7.5-9
Electrical conducvity 100-500μS/cm
Total hardness 4.5-8.5 dH
External air < 65°C
Oxygen content < 0.1 ppm
Maximum glycol content 0.5
Phosphates (PO4) < 2ppm
Manganese (Mn) < 0.05 ppm
Iron (Fe) < 0.3 ppm
Alkalinity (HCO3) 70 - 300 ppm
Chlorine ions (Cl-) < 50 ppm
Sulphate ions (SO4) < 50 ppm
Sulphide ion (S) none
Ammonium ions (NH4) none
Silica (SiO2) < 30ppm
Vers. U.M. 280 300 330 350 550 600 650 675 750 800 900 1000 1100 1250
Minimum water content
HAl/kW44444444444444
Minimum water content for process applicaons or operaon with low outdoor temperatures and low
load.
Outlet water temperature adjustment. Design ∆t less than 5°C.
HAl/kW88888888888888
NLC_H 0280 ÷ 1250 vers. P1 - P3 - P5 - P7
NLC_H 0280 ÷ 1250 vers. P2 - P4 - P6 -P8
67
7
8
8
9
Ingresso acqua
Water inlet
Uscita acqua
Water outlet
1
2
3
5
4
13
5
11
10
10
3
2
Accumulo
Water Tank
14

1 Plate heat exchanger
2 Water temperature sensor (IN/OUT)
3 Air drain valve
4 Pump
5 Safety valve
10 Water drain cock
11 Expansion tank


6 Water filter (obligatory)
7 Anti-vibration joints
8 Pressure gauge
9 Flow switch (obligatory)
13 Shut-off valve
14 

EN - 11
NLC
NLC_HA/HE cod: 4037315_01
WARNING
The selection and installation of the components
outside the appliance is assigned, due to his
competence, to the installer who will have to
operate according to the rules of good practice
and in compliance with the regulations in force in
the country of destination.
The hydraulic piping for connection to the
appliance must be properly scaled for the actual
water flow rate required by the system when
operating. The water flow rate to the heat
exchanger must always be constant.
Clean the system carefully before connecting the
unit. This is done in order to eliminate possible
residues such as welding spatter, waste, rust
or any other impurity from the pipes. These
substances could deposit inside and cause the
appliance to malfunction. The connection pipes
must be properly supported so as not to burden
the appliance with their weight.


If the system is shut down during the winter, the
water in the heat exchanger could freeze, causing
irreparable damage to the exchanger itself.
To avoid the risk of freezing, there are three pos-
sible solutions:
     from the appli-
ance.
 , with a glycol per-
centage chosen on the basis of the minimum
external temperature envisaged.
 
In this case the heaters must always be pow-
ered for the entire winter period (machine in
standby).
WARNING


 
The   allows any impurities in
the hydraulic circuits to be blocked and
eliminated; impurities that could reach the
heat exchanger and damage it.
It is ‘ OBLIGATORY to install the water filter
(not supplied) at a maximum of 1 m from the
cooling water inlet fitting.
The filter must have 

 
The has the task of making sure
that water is circulating in the unit.
If this is not the case, it shuts down the unit.
The unit does not start if the flow switch is not
wired to the panel and should be 

      


Characteriscs of the water
System: Chiller with plate heat exchanger
PH 7.5-9
Electrical conducvity 100-500μS/cm
Total hardness 4.5-8.5 dH
External air < 65°C
Oxygen content < 0.1 ppm
Maximum glycol content 0.5
Phosphates (PO4) < 2ppm
Manganese (Mn) < 0.05 ppm
Iron (Fe) < 0.3 ppm
Alkalinity (HCO3) 70 - 300 ppm
Chlorine ions (Cl-) < 50 ppm
Sulphate ions (SO4) < 50 ppm
Sulphide ion (S) none
Ammonium ions (NH4) none
Silica (SiO2) < 30ppm
Vers. U.M. 280 300 330 350 550 600 650 675 750 800 900 1000 1100 1250
Minimum water content
HAl/kW44444444444444
Minimum water content for process applicaons or operaon with low outdoor temperatures and low
load.
Outlet water temperature adjustment. Design ∆t less than 5°C.
HAl/kW88888888888888
Accessorio KRA1 per NLC0280-0350
Accessory KRA1 for NLC0280-0350
Accessorio KRA2 per NLC0550-0675
Accessory KRA2 for NLC0550-0675
67
7
8
8
9
Ingresso acqua
Water inlet
Uscita acqua
Water outlet
1
2
3
5
4
13
5
11
10
10
3
2
NLC_H 0280 ÷ 1250 vers. 01 - 03 - 05 - 07
NLC_H 0280 ÷ 1250 vers. 02 - 04 - 06 - 08
Accumulo
Water Tank

1 Plate heat exchanger
2 Water temperature sensor (IN/OUT)
3 Air drain valve
4 Pump
5 Safety valve
10 Water drain cock
11 Expansion tank
Buffer tank
13 Shut-off valve


6 Water filter (obligatory)
7 Anti-vibration joints
8 Pressure gauge
9 Flow switch (obligatory)
13 Shut-off valve
14 


12 - EN
NLC
EN
NLC_HA/HE cod: 4037315_01
 
The NLC units are fully wired in the factory and only  

, downstream of a unit switch, as provided for by the reg-
ulations in force in the country of installation.
It is also suggested to check:
1. the characteristics of the electrical network are suitable for the ab-
sorptions indicated in the electric data table. The unit should only be
powered when the installation work has finished (hydraulic and elec-
tric).
2. Respect the connection indications of the phase and earth wires.
3. The power supply line will have a relevant protection upstream against
short circuits and dispersions to earth that isolate the system with re-
spect to other utilities.
4. The voltage must be within a tolerance of ± 10% of the nominal power
supply voltage of the machine (for unbalanced three-phase unit max
3% between the phases). If these parameters are not respected, con-
tact the energy supplier.
5. For electrical connection refer to the regulations in force in the country
of installation

1. It is necessary to carry out an efficient earth connection. The manufac-
turer can not be held responsible for any damage caused by the lack or
ineffective earthing of the appliance.
2. For units with three-phase power supply check the correct connection
of the phases.

Before connecting the unit to the power supply mains, make sure that the
isolating switch is open.
Open the front panel.
Use the holes in the bottom part of the framework for the main electric
power supply cable and for the cables of the other external connections
under the responsibility of the installer.
It is prohibited to access positions with electric cables not specifically
indicated in this manual.
Avoid direct contact with the non-insulated copper piping and with the
compressor.
Identify the clamps for the electrical connection, always refer only to the
wiring diagram supplied with the unit.
For the operational connection of the unit, take the power supply cable to
the electric control board inside the unit and connect to the
L1-L2-L3 as phases, and PE as earth. Put back the inspection panels
Make sure that all the protections removed for the electrical connection
are put back before powering up the unit.
Set the master switch (on the outside of the appliance) to “ON”.
WARNING



         
      
      

.
   



          



Check that all power cables are correctly secured to the terminals when
switched on for the first time and after 30 days of use. Afterwards, check
them every six months.
Slack terminals could cause the cables and components to overheat.
WARNING


B
B
A
A

        
     


EN - 13
NLC
NLC_HA/HE cod: 4037315_01
 
L1 L2 L3
PHASE
EARTH (PE)
Power Supply:
NLC 0280 0300 0330 0350 0550 0600 0650 0675 0750* 0750** 0800 0900 1000 1100 1250

LRA °° A 248 308 369 381 458 633 733 746 592 610 645 821 841 954 980
MCA °° A 84 97 120 138 167 208 222 233 286 303 312 353 389 415 438
MOP °° A 112 131 171 189 223 282 307 319 341 359 368 427 463 500 523
Fuse recommended °° A 110 125 150 175 200 250 300 300 300 350 350 400 450 500 500

LRA °° A 240 299 360 371 445 619 719 739 569 587 619 793 811 931 971
MCA °° A 80 93 115 133 161 201 216 227 281 298 307 348 385 410 433
MOP °° A 107 126 166 184 216 275 301 312 337 354 363 422 458 495 518
Fuse recommended °° A 100 125 150 175 200 250 300 300 300 350 350 400 450 450 500

LRA °° A 128 157 182 188 236 286 333 342 295 306 320 370 379 435 453
MCA °° A 42 54 59 64 84 94 108 120 140 151 159 168 176 202 225
MOP °° A 55 72 82 86 111 124 150 161 166 177 185 198 207 244 267
Fuse recommended °° A 50 70 80 80 110 110 150 150 150 175 175 175 200 225 250

LRA °° A 100 105 134 138 176 228 286 292 222 231 242 293 300 365 379
MCA °° A 32 40 48 55 74 76 88 98 122 131 138 140 142 165 185
MOP °° A 42 52 68 75 97 100 123 133 145 154 162 165 167 200 220
Fuse recommended °° A 40 50 60 75 90 100 110 125 125 150 150 150 150 200 200
 
 

14 - EN
NLC
EN
NLC_HA/HE cod: 4037315_01





The unit control panel allow the quick se ng and
display of the unit’s opera ng parameters. The board
memorises all the default se ngs and any modifi ca-
 ons. By installing the remote control panel PGD1 it is
possible to remotely replicate all the func ons and the
se ngs available on the unit. A er a power failure the
unit is capable of an automa c restart, retaining the
original se ngs.
The user interface consists of a graphic display with
six naviga on keys; the display is arranged through a
menu hierarchy, ac vated by pressing the naviga on
keys. The default display of these menus is the main
screen. The naviga on between the various parame-
ters is by using the arrow keys located to the right of
the display. These keys are also used for the modifi ca-
 on of the selected parameter.
 





Displays the list of active and historical alarms
(red LED on = active alarm)





• Pressing this key activates the navigation between menus
(orange LED on = winter operating mode active)





• Pressing this key returns to the previous menu





• Pressing this key when navigating between menu/parameters passes to the next
menu/parameter
• Pressing this key when modifying a parameter increases the value of the selected parameter





• Pressing this key when navigating between menus allows entry to the selected menu
• Pressing this key when navigating between parameters allows selection of the parameter
displayed to modify it
• Pressing the key when modifying a parameter confirms the modification of the parameter value
selected





• Pressing this key when navigating between menu/parameters passes to the previous menu/
parameter
• Pressing this key when modifying a parameter decreases the value of the selected parameter




EN - 15
NLC
NLC_HA/HE cod: 4037315_01

A er having powered up the unit the control board will
carry out preliminary opera ons before being ready
for use. This ini al procedure takes around 60 seconds
to complete. During the ini al loading procedure two
screens are displayed: a start-up screen and a screen to
select the system language. These screens are detailed
in the table below.
        

    

  
C

Wait please 6s
A
Installer
ENTER for change
Language:
Time show mask:
English
ESC to confirm
20
A
this value shows the remain-
ing time to starting the software loaded on the unit, and passing the
to system language selection

this parameter shows the current language set for
the system. To change the language follow the instructions shown on
the screen.
C
      this value shows the
remaining time to modify the language. When the time elapses the
display goes to the main screen (Main screen - General monitoring).
          




16 - EN
NLC
EN
NLC_HA/HE cod: 4037315_01

A

C

E

I

G
Both the func ons to control the unit and the opera ng informa on
are displayed on the unit mounted control panel. All the func ons
and informa on are arranged in screens which in turn are grouped
into menus.
During the normal opera on of the unit the main screen is displayed,
from which it is possible to access the selec on of the other opera ng
menus.
The menus are displayed through the rota on of the icons that they
represent. Once the desired icon is selected the chosen menu is en-
tered, permi ng the display or modi ca on of the parameters that it
is made up from. The procedure for naviga ng the menus, or chang-
ing parameters, is explained in detail in the chapter “User opera ng
procedures”.
The adjacent drawing shows the rela on between the various menus
and the naviga on keys used.
        

         


   
A
--- MAIN The screens in this menu display the current conditions of the unit (unit status, setpoints,circuit data, etc.)

IN/OUT This menu contains advanced information on the unit operation
C
ON/OFF This menu permits the unit to be enabled or disabled, and provides information on the status

SYSTEM This menu permits the selection of the operating modes, the water setpoints and the time-clock for the system
E
RECOVERY If the unit includes heat recovery, this menu permits the setting of the parameters associated with the heat recovery

INSTALLER This menu contains the settings useful for the installer (enabling digital inputs, BMS configuration, control, pumps, etc.)

G
ASSISTANCE This menu is only accessible to qualified personnel

FACTORY This menu is only accessible to qualified personnel
I
CLOCK This menu contains the clock settings for the system control (date, hour, calender)


EN - 17
NLC
NLC_HA/HE cod: 4037315_01
12
To check or modify the opera ng parameters of the unit it is necessary to use the interface of the control panel on the unit. The basic opera ons that the user must be
capable of, for the correct use of the unit, are:
(1) Moving from one menu to the next.
(2) Selec ng and modifying a parameter.
User operating procedures
Moving between menus
(a) To move between the menus, the order in which they are dis-
played is shown in the previous page, enter the menu selection
mode by pressing the key (


).
(b) Once in the menu selection mode it is possible to move
between menus using the arrow keys: the key (


) to move to the
previous menu, and the key (


) to move to the next menu.
(c) When the desired menu is seen press the key (


)to enter the
menu. Press the key(


) to return to the menu selection mode.
Selecting and modifying a menu
(a) Once in the menu selected, by following the procedure (
1
), it
is possible to move between the screens using the arrow keys: the
key (


) to move to the previous parameter, and the key (


) to
move to the next parameter.
(c) When the desired parameter is seen press the key (


) to enter
the parameter. To exit the parameter and return to the parameter
selection mode press the key (


).
WARNING: Once a parameter is selected by pressing the key (


),
the parameter selection mode is automatically accessed and in this
mode the desired parameter values can be set with the following
procedure:
(1) Pressing the key (


) causes a flashing cursor to appear on the
first modifiable field of the parameter. If no modifiable fields are
displayed then the cursor will not appear.
(2) Pressing the key (


) or the key (


), the value of the field can
be increased or decreased.
(3) Pressing the key (


) confirms the modification of the field
value, saving it in memory. On the basis of the type of parameter
selected the number of modifiable fields can change.
previous menu
next
menu
exiting a menu
entering a
menu
previous para-
meter
next
parameter
exiting a
parameter
entering a para-
meter

18 - EN
NLC
EN
NLC_HA/HE cod: 4037315_01
 
Before starting the loading, set the unit's master switch to OFF
Check that the system discharge tap is closed
Open all the drain valves of the system and of the related terminals
Open the cut-off devices of the system.
Start the filling by slowly opening the water system filling tap on the outside
of the appliance.
When water begins to flow from the drain valves of the terminals, close them
and continue loading up to pressure value required for the system.
 
Before starting to empty, set the unit's master switch to OFF
Check that the water system load/restore tap is closed
Open the drain tap outside the machine and all the drain valves of the system
and the corresponding terminals.
 
WARNING
During the winter, if the system is shut down, the water in the heat exchanger
could freeze, causing irreparable damage to the heat exchanger itself.
To avoid the risk of freezing, there are three possible solutions:
Completely drain the water from the appliance.
the operation with glycol water, with a glycol percentage chosen on the basis
of the minimum outside temperature envisaged.
Use of heaters.
In this case the heaters must always be powered for the entire winter period
(machine in STAND-BY).
Check the hydraulic seal of the joints.
It is recommended that this operation be repeated after the appliance has
been running for some hours and periodically check the system pressure. The
reintegration should be carried out with the machine off (pump OFF).
If the system uses glycol, this liquid should not be drained to the environment
because it is a pollutant.
It must be collected and, if possible, reused.

EN - 19
NLC
NLC_HA/HE cod: 4037315_01
  




 

Bear in mind that a free start-up service is
offered by the Aermec Technical Service for
the unit of this series, at the request of Aermec
customers or legitimate owners and in ITALY
only. The start-up must be previously agreed on
the basis of the system implementation times.
Before the intervention all the operations
(electrical and hydraulic hook-ups, loading and
venting of the air from the system) must be
completed.





All the safety conditions have been respected
The unit has been properly secured to the
support base
The minimum technical spaces have been
observed;
That the main power cables are of an
appropriate secon, capable of supporng
the overall absorpon of the unit. (see electric
data secon), and that the unit has been duly
earthed.
That all the electrical connecons are correctly
xed and that all the terminals adequately
ghtened.


Power up the unit by turning the main switch
to ON. The display will come on a few seconds
after the machine is powered up, check that the
operation status is at OFF (OFF BY KEYB at the
bottom of the display).
Use a tester to check that the value of the
supply voltage to the L1.L2.L3. phases is equal to
400V ±10%, and also check that the unbalance
between the phases does not exceed 3%.
Check that the connections made by the installer
comply with the data in the documentation.
Check that the electric heater(s) of the
compressor casing are working, by measuring
the rise in the temperature in the oil sump.
The resistance(s) must operate for at least 12
hours before the compressor start-up, and in
any case the temperature of the oil sump must
be 10°C/50°F -15°C/59°F higher than the room
temperature.


(Setting the fan's speed
of rpm from the control panel).

Check that all the hydraulic connections have
been carried out correctly, that the information
on the plates have been complied with and
that a mechanical filter has been installed at
the evaporator inlet. (Mandatory component
subject to the invalidation of the warranty).
The flow switch must absolutely be installed,
and should be wired to the electrical panel,
calibrated and its intervention verified
(Obligatory component subject to the
invalidation of the warranty).
Check that the circulation pump(s) are working,
and that the water flow rate is sufficient to
close the flow switch contact.
Check the water flow rate, measuring the
difference of pressure between the evaporator
inlet and outlet, and then calculate the flow
rate with the evaporator pressure drop diagram
in the this documentation.
      
 ; closing the
cut-off valve at the heat exchanger outlet; the
block should be displayed on the unit's control
panel; finally open the valve again and rearm
the block.


ON ON
OFFOFF
SELECT MENÙ
ON/OFF



• Check that the absorption current of the
compressor is less than the maximum
indicated in the technical data table.
• Check that in models with three-phase
supply power the noise level of the
compressor is not abnormal, symptom
of reverse rotation and, if this is the case,
invert a phase.
• Make sure that the voltage value is within
the pre-fixed limits and that the unbalance
between the three phases (three-phase
supply power) does not go above 3%.
• Check for refrigerant gas leaks, especially
near the pressure points of pressure
gauges, pressure transducers and pressure
switches; (vibrations during transport may
have loosened the connections).
          
By comparing the temperature read with a
contact thermostat placed on the compressor
intake and the temperature shown on the
low pressure gauge (saturation temperature
corresponding to the evaporation pressure). The
difference between these two temperatures
gives the overheating value. Optimum values
are between 4°C/39.2°F and 8°C/46.4°F.
                     
If the sub-cooling and overheating values
are correct, the temperature measured in
the pressing line tube at the compressor
outlet must be 30/40°C - 86/104°F above the
condensation temperature.

:


That stops the compressor and generates
the respective alarm when the flow pressure
exceeds the set value. To check it is operating
correctly, close the air intake to the heat
exchanger (cooling mode), and keeping an eye
on the high pressure gauge, check it intervenes
at the calibration setting. Warning: If the switch
does not trip at the calibration value, stop the
compressor immediately and check the causes.
The reset is manual and can only take place
when the pressure drops below the differential
value. (For the set and differential values, see
the technical manual).

The anti-freeze control, which is managed by
electronic regulation and by the temperature
probe at the evaporator outlet, has the function
of preventing the formation of ice when the
water flow rate is too low. Checking it is working
correctly can be carried out by progressively
increasing the anti-freeze set-point until it
exceeds the outlet water temperature and
keeping the water temperature under control
with a high precision thermometer. Check that
the unit switches off, setting off the respective
alarm. After this operation take the anti-freeze
set-point back to its original value.

20 - EN
NLC
EN
NLC_HA/HE cod: 4037315_01
 
Any cleaning operations are forbidden until the
unit has been disconnected from the electrical
power supply mains 1
Make sure there is no voltage before operating.
Periodic maintenance is essential to maintain the
unit in perfect working order under the functional
as well as the energetic aspect.




• Water circuit filling
• Water filter cleaning (NOT SUPPLIED)
• Flow switch control (NOT SUPPLIED)
• The absence of air in the circuit (bleeding)
• That the water flow rate to the evaporator is
always constant
• The condition of the hydraulic piping thermal
insulation
• Where applicable, the percentage of glycol


• The efficiency of safety devices
• The electrical power supply voltage
• The electrical power absorption
• The connections are tight
• The operation of the compressor casing
resistance


• Compressor conditions
• Efficiency of the plate-type exchanger
resistance
• Work pressure
• Leak test for checking the water tightness of
the cooling circuit
• Operation of high and low pressure switches
• Carry out the necessary checks on the filter-
drier to check its efficiency.


      the
compressors and the electrical box, and the
exterior panelling of the unit. If they are
poorly tightened, they produce abnormal
noise and vibrations
 
The NLC units are filled with R410A gas and
inspected in the factory. Under normal conditions,
no Technical Assistance Service operation is
needed for checking the refrigerant gas. Over
time, however, small leaks of refrigerant may
arise draining the circuit, causing the appliance to
malfunction. In these cases, the refrigerant leakage
points should be found and repaired, and the
refrigerant load should be replenished , operating
in compliance with Law 28 December 1993 no. 549.

The disposal of the unit should be carried out
according to the rules in force in the various
countries.
WARNING
It is advisable to keep a machine booklet (not
supplied, but the responsibility of the user), in order
to keep track of the operations carried out on the
unit. In this way, it will be much easier to organise the
operations properly and facilitate troubleshooting.
In the booklet, write down date, type of operation
carried out (regular maintenance, inspection or
repair), description of the operation, measures
taken
WARNING





EN - 21
NLC
NLC_HA/HE cod: 4037315_01
  
The unit does not start
• No electrical voltage • Check for voltage
• Check the safety systems upstream of the appliance
• Master switch on OFF
• Remote switch on OFF (if present)
• Control panel on OFF
• Main switch on OFF
• Compressor thermomagnetic switch on OFF
• Set to ON
• The flow switch is not connected on the termi-
nal board therefore the circuit is open
• Install and wire the flow switch
• NB. DO NOT bridge the contacts on the terminal
board (otherwise the unit will not stop in the event
of insufficient water and the exchanger would be to
throw away!)
• Power supply voltage too low • Check power supply line
• Coil of the compressor remote control switch
is broken
• Electronic circuit board faulty
• Peak condenser faulty
• Compressor faulty
• Replace the component
Poor yield
• No refrigerant
• Dirty coils
• Water filter clogged
• Appliance dimensioning
• Operating outside the operating limits
• Check the load and any leaks
• Clean the coils
• Clean the filter
• Check performance
• Check the operating limits using the graphics
Compressor noisy
• Liquid return to the compressor
• Inadequate fixing • Check
• Inverted phase • Invert a phase
Noises and vibrations
• Contact between metallic bodies • Check
• Weak support • Strengthen
• Loose screws • Tighten the screws
The compressor stops due to the intervention of the
protections
• Excessive flow pressure
• Low intake pressure
• Low power supply voltage
• Electrical connections tightened badly
• Operation outside operating limits
• Check the operating limits using the graphics
• Pressure switch malfunctioning • Replace the component
• Circuit breaker protection intervention
• Check the power supply voltage and calibra-
tions
• Check the electrical isolation of the windings
• Flow switch intervention • Check water flow rate
Compressor high discharge pressure
• High external air temperature
• High utility inlet water temperature • Check the operating limits using the graphics
• Insufficient air flow
• Insufficient water flow
• Control:
1. operation of the fans
2. Cleanliness of the coil
3. Operation of the pump (speed)
4. Cleanliness of the filter
• Anomalous operation adjusting the fans • Check or replace if broken
• Air in the hydraulic system • Vent the circuit
• Too much refrigerant gas charged • Restore the correct charge
Low discharge pressure
• Low outside air temperature
• Low water inlet temperature
• Check the operating limits using the graphics,
as above
• Moisture in the refrigerant circuit • Empty and restore the gas charge
• Air in the hydraulic system • Bleed the circuit
• Insufficient gas load • Restore the correct load
High intake pressure
• High external air temperature
• High utility inlet water temperature
• Thermostatic expansion valve too open or
damaged
• Check the operating limits using the graphics
• Adjust or replace if damaged
Low intake pressure
• Utilities low inlet water temperature
• Low outside air temperature
• Thermostatic expansion valve damaged or
blocked
• Check the operating limits using the graphics
• Adjust or replace if damaged
• Insufficient water flow
• Insufficient air flow
• Control:
1. operation of the fans
2. Cleanliness of the coil
3. Pump operation (speed)
4. Filter cleanliness
 