AERMEC NRL Technical Manual Installation Maintenance
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AERMEC NRL Technical Manual Installation Maintenance

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CHILLERS- Technical manual - installation - maintenance
°
COMPACT
L
COMPACT LOW NOISE
H
STANDARD COMPACT HEAT PUMP
HL
SILENCED COMPACT HEAT PUMP
NRL
EN
INRLPY. 02.10 4086916_01

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  • Page 1 CHILLERS- Technical manual - installation - maintenance ° COMPACT COMPACT LOW NOISE STANDARD COMPACT HEAT PUMP SILENCED COMPACT HEAT PUMP INRLPY. 02.10 4086916_01...
  • Page 3 AERMEC S.p.A 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.

  • Page 4: Table Of Contents

    Nrl ° - l 2800 - 3000 - 3300 -3600 ........ 36 3.3. Safety and control components ......10 21.2. Nrl ° - l - h 2800 - 3000 - 3300 -3600 ......38 3.4. Electrical components ..........10 Hydraulic circuit ............40 Accessories ..............
  • Page 5 AERMEC S.p.A. 37040 Bevilacqua (VR) Italy – Via Roma, Tel. (+39) 0442 633111 Telefax 0442 93730–(+39) 0442 93566 www.aermec.com - info@aermec.com SERIAL NUMBER CONFORMITY DECLARATION We, the undersigned, declare on our own exclusive responsibility that the object in question, so defined:...

  • Page 6: General Warnings

    GENERAL WARNINGS The AERMEC NRL units are built be valid if the indications mentioned according to the recognised standards above are not observed. and safety regulations. They have 1.2. SAFETY PRECAUTIONS AND been designed for air conditioning Standards and directives to...

  • Page 7: Description And Choice Of The Unit

    DESCRIPTION AND CHOICE OF THE UNIT The NRL is a set of devices designed to 2.2. VERSIONS AVAILABLE produce cold water for technological systems. ACCORDING TO the size of several • HEAT RECOVERY UNITS − Mechanical thermostatic valve (Y): several coolingand hydraulic circuits, with desuperheater inserted in −...

  • Page 8: Confi Gurator

    2.3. CONFIGURATOR 1.2.3 4.5.6 15, 16 ° ° ° ° ° ° ° field 1, 2, 3 Code 4, 5, 6 Size 280, 300, 330, 360 Compressors Standard compressor Thermostatic valve ° Standard mechanical thermostatic valve (to +4°C) Low water temperature mechanical thermostatic valve (to -6°C) Electronic thermostatic valve also for low water temperature (to -6°C) Model °...

  • Page 9: Chiller Circuit

    CHILLER CIRCUIT Cycle reversing valve (heat pump only) Inverts the fl ow of refrigerant when Compressors operation is switched between High effi ciency scroll-type hermetic summer/winter, and during defrosting compressors, assembled on elastic anti- cycles. vibration supports, driven by a 2-pole electric motor with internal thermal protection of the Non-return valve electric heater casing included as standard.

  • Page 10: Safety And Control Components

    Accumulator tank Anti-freeze heater ELECTRONIC REGULATION In stainless steel, with a 700-litre capacity. (installed as standard) MICROPROCESSOR CARD In order to reduce the thermal dispersion Its operation is commanded by the antifreeze Consisting of a management/control card and eliminate the phenomenon of the probe located in the plate-type evaporator.

  • Page 11: Accessories

    ACCESSORIES Through this accessory it is possible to connect the unit with BMS supervision AER485 systems with electrical standard RS 485 and MODBUS type protocol. • • • ° • • • • • • • • • • • •...
  • Page 12 DCPX only for configurations with enlarged fans (M). ° standard Simplified control system to switch on and off, and command, two DUALCHILLER chillers (using Aermec GR3 command) in a single system, as if they were a single unit. • • •...

  • Page 13: Starting Current Reduction In Presence Of Dre Accessories

    STARTING CURRENT REDUCTION IN PRESENCE OF DRE ACCESSORIES MODEL SINGLE CIRCUIT DOUBLE CIRCUIT THREE-CIRCUIT FOUR-CIRCUIT FIVE-CIRCUIT SIX-CIRCUIT -30% -26% -22% -20% -18% -16% CURRENT REDUCTION TECHNICAL DATA 6.1. TECHNICAL DATA VERSIONS [°-L] COOLING 2800 3000 3300 3600 ° Cooling output °...
  • Page 14 6420 [1] The useful heads refer to the nominal air flow rate. (1) Sound power Aermec determines the sound power value on the basis of measurements taken in accordance with standard 9614-2, in compliance with the Eurovent certifi cation. (2) Sound pressure Sound pressure in an unrestricted range on a refl...

  • Page 15: Technical Data

    TECHNICAL DATA 7.1. TECHNICAL DATA VERSIONS [H-HL] COOLING 2800 3000 3300 3600 Cooling output Total input power 114550 126250 145510 156180 Water flow rate 103890 114210 128310 136570 40.2 40.4 46.9 45.7 Total pressure drops 33.4 33.6 37.0 35.5 HEATING 2800 3000 3300...
  • Page 16 6490 6660 6880 (1) Sound power Aermec determines the sound power value on the basis of measurements taken in accordance with standard 9614-2, in compliance with the Eurovent certifi cation. (2) Sound pressure Sound pressure in an unrestricted range on a refl ective plane (directional fact.

  • Page 17: Technical Data

    8100 8100 8100 (1) Sound power Aermec determines the sound power value on the basis of measurements taken in accordance with standard 9614-2, in compliance with the Eurovent certifi cation. (2) Sound pressure Sound pressure in an unrestricted range on a refl ective plane (directional fact.

  • Page 18: Operating Limits

    OPERATING LIMITS 9.1. COOLING MODE The devices in their standard configurations are not suitable for installation in salty environments. The maximum and minimum limits for the water flow rate to the exchanger are indicated by the curves of the pressure drop diagrams. For the operating limits, refer to the diagrams below, valid for ∆t = 5°C.

  • Page 19: Correction Factors

    CORRECTION FACTORS CORRECTION COEFFICIENTS OF THE COOLING CAPACITY 10.1. COOLING CAPACITY AND 20°C INPUT POWER 25°C 30°C 35°C − "STANDARD VERSIONS" The refrigerating capacity yielded 40°C and the input electrical capacity in conditions other than rated conditions 42°C are obtained by multiplying the rated values (Pf, Pa) by the respective correction coefficients (Cf, Ca).

  • Page 20: Heating Capacity And Input Power

    CORRECTION COEFFICIENTS OF THE HEATING CAPACITY 10.2. HEATING CAPACITY AND INPUT POWER 25°C 30°C 35°C 40°C 45°C − "HEAT PUMP VERSIONS" 50°C 55°C The heating capacity yielded and the input electrical capacity in conditions other than rated conditions are obtained by multiplying the rated values (Pt, Pa) by the respective correction coefficients (Ct, Ca).

  • Page 21: Pressure Drops

    PRESSURE DROPS 11.1. TOTAL PRESSURE DROPS (°-L) The chiller consists of two hydraulic Standard NRL unit (° - L). circuits per module. The water outlet probe (WOP) with its The pressure drops indicated in the trap is free, near the electrical box,...

  • Page 22: Total Pressure Drop (H-Hl)

    TOTAL PRESSURE DROP (H-HL) to the pressure drops when the The water outlet probe (WOP) with its Standard NRL heat pump unit (H - HL). average water temperature varies trap is free, near the electrical box, remember to insert it in the collector...
  • Page 23 USEFUL HEADS LOW PREVALENCE HEAT PUMP ON COOLING OPERATION(H-HL) 3600 3300 2800 3000 20000 40000 60000 80000 100000 120000 140000 160000 180000 200000 Water flow rate l/h USEFUL HEADS HIGH PREVALENCE HEAT PUMP ON COOLING OPERATION(H-HL) 3600 3300 3000 2800 20000 40000 60000...

  • Page 24: Accumulator

    ACCUMULATOR 12.1. MAXIMUM/MINIMUM WATER CONTENT IN THE SYSTEM 12.2 12.1.1. Maximum water content Hydraulic height H m 30 ≥ 12.25 recommended Expansion tank calibration Water content reference value 2.174 2.646 3.118 3590 3852 In the table 12.2 the maximum content Water content reference value 1190 1404...

  • Page 25: Capacity Controls

    ( * ) Cooling capacity % 1° 2° 3° 4° 5° 6° 7° 8° 9° 10° 11° 12° Versions NRL 280 NRL 300 NRL 330 NRL 360 Levels of power ( * ) Input power % Versions 1° 2° 3° 4° 5° 6° 7°...

  • Page 26: Glycol

    GLYCOL FcGDpF (a) 2.20 − The cooling capacity and input FcGDpF (b) 2. 1 0 power correction factors make 2.00 FcGDpF (c) allowance for the presence of 1.90 FcGDpF (d) glycol and the different evaporation 1.80 1.70 temperature. 1.60 FcGDpF (e) −...

  • Page 27: Desuperheater

    Processed water temperature at the desuperheater (∆t 5°C) 15.1. PRESSURE DROPS The NRL models with desuperheater, from size 2800 to 3600, have 4 desuperheaters DESUPERHEATER PRESSURE DROPS (placed in parallel 2 to 2). the characteristics of the desuperheaters and the pressure drop curves are shown below.

  • Page 28: Total Recovery

    Pressure drop recovery exchanger 60.4 66.9 65.9 68.2 16.1. PRESSURE DROP TOTAL PRESSURE DROPS RECOVERY The NRL models with total heat recovery 200,0 always have 1 heat recovery unit. 3600 3000 3300 The characteristics of the heat recovery 180,0 2800...

  • Page 29: Measurements Of The Chillers Lines Versions (C)

    Liquid line f [mm] Line length metre of line metre of line Model [g/m] [g/m] C1/C3 C2/C4 C1/C3 C2/C4 C1/C3 C2/C4 0-10 67(*) NRL 2800C 10-20 67(*) 20-30 67(*) 0-10 67(*) 67(*) NRL 3000C 10-20 67(*) 67(*) 20-30 67(*) 67(*)

  • Page 30: Sound Data

    Pressure 1000 2000 4000 8000 NRL°/L Pow. dB(A) dB(A) Sound power dB(A) Sound power by central band frequency [dB] Aermec determines the sound power 93.5 61.5 75.5 103.5 93.5 91.9 85.0 83.0 76.5 70.0 2800° value on the basis of measurements 93.5...
  • Page 31 2800 3000 COMPRESSOR THERMOMAGNETIC SWITCHES 400V CIRCUIT 1° CIRCUIT 2° CIRCUIT 1° CIRCUIT 2° MTC1 mtc1a mtc1b mtc2 mtc2a mtc2b HIGH PRESSURE SWITCH WITH MANUAL RESET PA (bar) High pressure transducer TAP (bar) LOW PRESSURE TRANSDUCER TBP (bar) CHILLER CIRCUIT SAFETY VALVE AP (bar) BP (bar) only in heat pump FANS THERMOMAGNETIC SWITCHES [°]...

  • Page 32: Selection And Place Of Installation

    FOR THE INSTALLER SELECTION AND PLACE OF INSTALLATION 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). Before installing the unit, decide with We shall not be held responsible for any damage whatsoever resulting from the the customer the position in which it non-compliance with these instructions.

  • Page 33: Dimensional Tables

    20.2. DIMENSIONAL TABLES NRL 2800 - 3000 - 3300 - 3600 STANDARD DESUPERHEATER water connections OUT 2” 2450 IN 2” Evaporator water connections IN 4” IN 4” OUT 4” OUT 4” Position AVX MODEL POSITION *NOTE: 2800 °-L The opposite table shows the variation 3000 °-L...
  • Page 34 NRL 2800 - 3000 - 3300 - 3600 HYDRAULIC CONNECTIONS PUMP UNIT DESUPERHEATER water connections OUT 2” 2450 IN 2” EVAPORATOR water connections IN 4” IN 4” OUT 4” OUT 4” Position AVX 34 INRLPY. 02.10 4086916_01...
  • Page 35 NRL 2800 - 3000 - 3300 - 3600 HYDRAULIC CONNECTIONS HYDRONIC UNIT DESUPERHEATER water connections OUT 2” 2450 IN 2” EVAPORATOR water connections IN 4” IN 4” OUT 4” OUT 4” Position AVX INRLPY. 02.10 4086916_01...

  • Page 36: Weight Distribution And Center Of Gravity

    WEIGHT DISTRIBUTION AND CENTER OF GRAVITY 21.1. NRL ° - L 2800 - 3000 - 3300 -3600 A VACUUM RUNNING MODEL CENTRE OF GRAVITY WEIGHT BARICENTRO TOTAL WEIGHT Water NRL 2800 °/L 3952 5630 3954 5670 NRL 2800 °/L 3893...
  • Page 37 PERCENTAGE OF WEIGHT DISTRIBUTION SUPPORTS (%) Model NRL 2800 °/L 7,4% 13,4% 7,6% 13,8% 4,6% 8,3% 4,6% 8,3% 6,3% 11,4% 5,1% 9,2% NRL 2800 °/L 10,4% 11,8% 10,7% 12,1% 3,6% 4,0% 8,5% 9,6% 8,9% 10,1% 4,8% 5,4% NRL 2800 °/L...

  • Page 38: Nrl ° - L - H 2800 - 3000 - 3300 -3600

    21.2. NRL ° - L - H 2800 - 3000 - 3300 -3600 A VACUUM RUNNING MODEL CENTRE OF GRAVITY WEIGHT BARICENTRO TOTAL WEIGHT Water NRL 2800 °/L (H) 3975 6080 3977 6140 NRL 2800 °/L (H) 3918 6730 3825...
  • Page 39 PERCENTAGE OF WEIGHT DISTRIBUTION SUPPORTS (%) Model NRL 2800 °/L (H) 7,2% 12,9% 7,8% 14,1% 4,5% 8,2% 4,6% 8,2% 6,6% 11,9% 5,0% 9,0% NRL 2800 °/L (H) 10,0% 11,6% 10,7% 12,4% 3,6% 4,2% 8,2% 9,5% 9,1% 10,5% 4,8% 5,5% NRL 2800 °/L (H)

  • Page 40: Hydraulic Circuit

    − Open the drain tap outside the machine sleeve of ½ inch. For NRL 2250 model with pumping unit, it and all the vent valves of the system is recommended the installation, to the and the corresponding terminals.
  • Page 41 The drawings are only examples of the machine hydraulic circuit Circuit 1° Circuit 2° Evaporators (plate-type exchangers) Expansion tank Flow switch Pumps Filter In addition to the filter, victaulic and welded pipes are provided CHILLER HYDRAULIC CIRCUIT DRAIN TAP (ONLY PUMP VERSIONS) The drawings are only examples of the machine hydraulic circuit fig 1...
  • Page 42 Circuit 1° The drawings are only examples of the machine hydraulic circuit Circuit 2° Evaporator (plate-type exchangers) Expansion tank Accumulator Pumps Filter In addition to the filter, victaulic and welded pipes are provided CHILLER HYDRAULIC CIRCUIT DRAIN TAP (VERSIONS WITH ACCUMULATOR) The drawings are only examples of the machine hydraulic circuit fig 2...

  • Page 43: Electrical Wirings

    ELECTRICAL WIRINGS All electrical operations must be carried out BY QUALIFIED PERSONNEL, IN ACCORDANCE WITH THE CORRESPONDING REGULATIONS, trained and The default NRL chillers are completely informed about the risks related to such operations. wired and only need the connection...

  • Page 44: Connection To The Power Supply

    For higher lengths or different types 23.3. ELECTRICAL POWER CONNECTION 23.4.2. Pump contactor (CP01 - CP02) of cable installation, it will be the To prepare the pump contactor, connect DESIGNERS responsibility to carefully the device CP01 to the clamp 2 of the For functional connection −...

  • Page 45: Control And Fi Rst Start-Up

    24.3.2. Season change of PR3 times. Before the intervention of the AERMEC knife switch on ON fi g.1 After Sales Service, all the operations − Just act directly on the switch. The...

  • Page 46: Functioning Characteristics

    EXTRAORDINARY CONTROL: MAINTENANCE − Efficiency of safety devices − Electrical power supply The NRL are loaded with R410A gas and − Electrical power consumption tested in the factory. In normal conditions, − Connections tightened no Technical Assistance Service operation −...
  • Page 47 the circuit is drained, causing the unit − The refrigerant R410A has to be malfunction. In these cases, the refrigerant loaded only in liquid phase. It is advisable to keep a leakage points are found and repaired, − Different operating conditions from machine booklet (not and the cooling circuit is recharged, the normal can result in different...
  • Page 48 The technical data in the following documentation are Via Roma, 996 - Tel. (+39) 0442 633111 not binding. Aermec reserves the right to make all the Telefax (+39) 0442 93730 – (+39) 0442 93566 modifications considered necessary for improving the product www.aermec.com...

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