Wesper SLS 1202 Installation And Maintenance Manual
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Wesper SLS 1202 Installation And Maintenance Manual

Air cooled chillers and heat pumps with screw compressors
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Installation and maintenance manual
SLS 1202 ÷ 4004
SLH 1202 ÷ 3804
English
Air cooled chillers and heat pumps with screw compressors
262
916 kW
287
853 kW
IOM SLS407-N.1GB
Date : November 2005
Supersedes : None

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Summary of Contents for Wesper SLS 1202

  • Page 1 Installation and maintenance manual SLS 1202 ÷ 4004 SLH 1202 ÷ 3804 English Air cooled chillers and heat pumps with screw compressors  916 kW  853 kW IOM SLS407-N.1GB Date : November 2005 Supersedes : None...

  • Page 2: Table Of Contents

    Manuale SLS-SLH1 2.8.2005 12:33 Pagina 1 Table of contents Table of contents 1 FOREWORD 7 GENERAL DESCRIPTION 1.1 Introduction 7.1 Introduction 1.2 Warranty 7.2 General specifications 1.3 Emergency stop/Normal stop 7.3 Compressors 1.4 An introduction to the manual 7.4 Refrigerant circuits 7.5 Water heat exchanger 2 SAFETY 7.6 Air heat exchanger...

  • Page 3: Foreword

    Manuale SLS-SLH1 2.8.2005 12:33 Pagina 2 Foreword FOREWORD Failure to comply with any of these conditions will automatically void the warranty. 1.1 Introduction 1.3 Emergency stop / Normal stop Itelco-Clima units, manufactured to state-of-the-art de- The emergency stop of the unit can be enabled using sign and implementation standards, ensure top per- the master switch on the control panel (move down formance, reliability and fitness to any type of air-...

  • Page 4: Safety

    Manuale SLS-SLH1 2.8.2005 12:33 Pagina 3 Safety SAFETY The guards of the fans (only for units pro- vided with air heat exchangers) must be al- ways mounted and must never be removed Foreword before de-energising the appliance. These units must be installed in conformity with the provisions of Machinery Directive 98/37/EC, Low It is the User’s responsibility to ensure that Voltage Directive 73/23/EC, Pressure Vessels Direc-...

  • Page 5: Access To The Unit

    Manuale SLS-SLH1 2.8.2005 12:33 Pagina 4 Safety al, that must be strictly complied with, without ex- use tools in a good state of repair; be sure to have ceeding the scope of the tasks entrusted to him. understood the instructions before using them be sure to have removed all tools, electrical cables ENGINEER: means a person authorised directly by and any other objects before closing and starting...

  • Page 6: Precautions During Maintenance Operations

    Manuale SLS-SLH1 2.8.2005 12:33 Pagina 5 Safety check all the electrical connections, the connecting make sure that on-off remote controls are inhibited cables, and in particular the insulation; replace wear suitable personal protective equipment (hel- worn or damaged cables met, safety gloves, goggles and shoes etc.) periodically check the board’s internal wiring To carry out any measurements or checks which re- do not use cables having an inadequate section or...

  • Page 7: Safety Labels

    Manuale SLS-SLH1 2.8.2005 12:34 Pagina 6 Safety 2.7 Safety labels The labels below will be affixed to each unit in the in- dicated point: Identification of the refrigerant - External door Gravity centre - Base Identification of the unit - Electrical warning Outside, on the right-hand front column Adjacent to the master switch...
  • Page 8 Manuale SLS-SLH1 2.8.2005 12:34 Pagina 7 Safety ATTENZIONE INSERIRE LE RESISTENZE DI RISCALDAMENTO OLIO ALMENO 12 ORE PRIMA DI OGNI AVVIAMENTO (SE PREVISTE). PRIMA DELLA MESSA IN TENSIONE ASSICURARSI CHE LE VITI DEI CIRCUITI ELETTRICI SIANO SERRATE COMPLETAMENTE . WARNING ENERGIZE THE CRANCKCASE HEATER FOR AT LEAST 12 HOURS BEFORE EACH STARTING (IF FITTED).

  • Page 9: Safety Regulations

    Manuale SLS-SLH1 2.8.2005 12:34 Pagina 8 Safety Safety regulations Refrigerant data Safety data: R407C Toxicity Contact with skin If sprayed, the refrigerant is likely to cause frost burns. If absorbed by the skin, the danger is very limited; it may cause a slight irritation, and the liquid is degreasing.
  • Page 10 Manuale SLS-SLH1 2.8.2005 12:34 Pagina 9 Safety General precautions Do not inhale concentrated vapours. Their concentration in the atmos- phere should not exceed the minimum preset values and should be maintained below the professional threshold. Being more weighty than the air, the vapour concentrates on the bottom, in narrow areas. There- fore, the exhaust system must work at low level.
  • Page 11 Manuale SLS-SLH1 2.8.2005 12:34 Pagina 10 Safety Refrigerant oil data Safety data: Polyolester oil (POE) Classification Not harmful Contact with skin May cause slight irritation. Does not require first aid measures. It is rec- ommended to follow usual personal hygiene measures, including wash- ing the exposed skin with soap and water several times a day.

  • Page 12: Transport, Lifting And Positioning

    Manuale SLS-SLH1 2.8.2005 12:34 Pagina 11 Transport, Lifting and Positioning TRANSPORT, LIFTING AND It is recommended to use a spacer to prevent cables from damaging the unit (see the figure). POSITIONING Refrigerators are supplied assembled (apart from standard antivibrating rubber supports, that will be Lifting 4/6 mt installed on site).

  • Page 13: Anchoring

    Manuale SLS-SLH1 2.8.2005 12:34 Pagina 12 Transport, Lifting and Positioning Before positioning the unit, make sure that the place 3.3 Anchoring of installation is appropriate and sturdy enough to hold the weight and to withstand the stress caused It is not essential to secure the unit to the foundations, by the operation of the whole assembly.

  • Page 14: Installation

    Manuale SLS-SLH1 6-09-2005 10:53 Pagina 13 Installation INSTALLATION the unit must not be installed in air shafts, narrow courts or other small places, where the noise may be reflected by the walls or the air ejected by fans 4.1 Positioning of the unit may short-circuit itself on refrigerant/air heat ex- changers or condenser Before installing the unit, make sure that the...
  • Page 15 Manuale SLS-SLH1 6-09-2005 10:53 Pagina 14 Installation Units without antivibrating bracket supports Prepare the base, that must be flat and plane. Lift the appliance and insert shock absorbers as follows: 2) secured the bracket on the base with the screws forming part of the kit.

  • Page 16: External Hydraulic Circuit

    Manuale SLS-SLH1 2.8.2005 12:34 Pagina 15 Installation The capacity of the expansion vessel must allow for an expansion of at least 2% of the volume of the fluid in the circuit (evapora- tor, piping, user circuit and standby tank, if any).

  • Page 17: Hydraulic Connection

    Manuale SLS-SLH1 2.8.2005 12:34 Pagina 16 Installation Then: Provide the evaporator with a by-pass circuit equipped with a valve to wash the plant. Insulate the piping, to prevent the risk of heat loss. Position a filter on the suction side of the evapora- tor of the heat recovery condenser.

  • Page 18: Power Supply

    Manuale SLS-SLH1 2.8.2005 12:34 Pagina 17 Installation 4.6 Power supply 4.7 Electrical connections Before carrying out any operations on the The unit must be installed on site according to the electrical system, make sure that the unit is Machinery Directive (98/37/EC), the Low Voltage Di- deenergised.
  • Page 19 Manuale SLS-SLH1 2.8.2005 12:34 Pagina 18 Installation Terminal box QG - Y1 REMOTE START/STOP SWITCH (SRS) (COMMON) REMOTE SUMMER/WINTER SWITCH (ONLY HP) (SRHP) PHASE VOLTAGE CONTROL (ACCESSORY) (SQZ) DOUBLE SET-POINT (DAY/NIGHT) (SDN) FLOW SWITCH (SF) EXTERNAL INTERLOK (OPTIONAL) CIRC PUMP ETC LOAD SHEDDING REMOTE CONTROL C.1 (1-SLS/OFF) (COMMON)

  • Page 20: Connecting The Plate Type Evaporator's Temperature Sensors

    Manuale SLS-SLH1 2.8.2005 12:34 Pagina 19 Installation 1/2” Gas well Manual exhaust valve 4.8 Connecting the plate-type evaporator’s temperature sensors 3’ manifold fitting 3” Victaulic Flex joint BT-IN The SLH and SLS units with plate-type heat exchang- ers are provided with fittings for hydraulic connec- tions between the heat exchangers and the plants, complete with sensor well to fasten the temperature sensors for the water entering and leaving the plant;...

  • Page 21: Connecting The Temperature Sensor Of Coupled Units' Manifold (Sls 3804-4004/Slh 2804-3804)

    Manuale SLS-SLH1 2.8.2005 12:34 Pagina 20 Installation 4.9 Connecting the temperature sensor of coupled units’ manifold (SLS 3804–4004/SLH 2804-3204- 3604-3804) For the SLS 3804 - 4004 and SLH 2804 - 3204- ter returning from the plant is not installed on the 3604 - 3804 units, the two heat exchangers (of plate unit.

  • Page 22: Start-Up

    Manuale SLS-SLH1 2.8.2005 12:34 Pagina 21 Start-up START-UP Check position of temperature sensor to defrost (only heat pump). The unit must be started for the first time by Check that oil heaters, if any, have been turned on personnel suitably trained by one of Itelco- at least 12 hours before.

  • Page 23: Checking The Operation

    Manuale SLS-SLH1 2.8.2005 12:34 Pagina 22 Start-up 5.3 Checking the operation Check the following: The temperature of the water entering the evapo- rator. The temperature of the water leaving the evapora- tor. The level of the water flow rate in the evaporator, if possible.

  • Page 24: Operation

    Manuale SLS-SLH1 2.8.2005 12:34 Pagina 23 Operation OPERATION “Chiller Control” system for SLS/H two screw compressors units The units SLS/SLH are equipped with a microproces- These cooling only water chillers are provided with a sor control logic and regulation management sys- microprocessor board having a default program for tem.
  • Page 25 Manuale SLS-SLH1 2.8.2005 12:34 Pagina 24 Operation The connection between the terminal unit and the board is realized by a 6 ways phone cable. on-off alarm enter The connection between the terminal unit and the main board is not strictly necessary to the normal op- eration of the controller.

  • Page 26: Functions / Keys / Configurations

    Manuale SLS-SLH1 2.8.2005 12:34 Pagina 25 Operation 6.3 Functions / Keys / Configurations Tabella degli allarmi Code Alarm Description Comp 1 Comp 2 Fan #1 Fan #2 Pump Notes Status Status Status Status Status AL01 Wrong power Phase monitor (1) AL02 Antifreeze alarm AL03...
  • Page 27 Manuale SLS-SLH1 2.8.2005 12:34 Pagina 26 Operation I/O (input / output) Status 3. COMPRESSORS WORKING HOURS Pushing the “I/O” key it is possible to access to all U:1 SYS the masks showing the values read by all the sensors Compressor 00000 h installed on the unit.
  • Page 28 Manuale SLS-SLH1 2.8.2005 12:34 Pagina 27 Operation HOUR_THRES Maintenance alarm threshod 003X1000h Setpoint Pushing the “Set” key it is possible to access to user’s Setpoint level. The following table contains the de- tails of the parameters which is possible to set with the relevant limitations and default values: User’s Setpoints Control of...

  • Page 29: General Description

    Manuale SLS-SLH1 2.8.2005 12:34 Pagina 28 General Description GENERAL DESCRIPTION 7.1 Introduction The SLS/SLH units are water chillers/air-water heat ing applications or industrial processes. pumps with screw compressors provided with two or The units are fit for outdoor installation of the roof of four refrigeration circuits.

  • Page 30: Water Heat Exchanger

    Manuale SLS-SLH1 2.8.2005 12:34 Pagina 29 General Description sight glass with humidity indicator, a differential oil The external surface is provided with wire resistors pressure switch. Furthermore, each circuit is (130 Watt), which prevent frosting at low tempera- equipped with safety devices in accordance with tures (down to -18°C) when the unit is off.
  • Page 31 Manuale SLS-SLH1 2.8.2005 12:34 Pagina 30 General Description SLS - Refrigerant circuit of units with Shell and Tube evaporator Note: the units are equipped with two refrig- eration circuits. Only one circuit is il- lustrated for the sake of simplicity. Safety devices: A HP pressure switch C Transducer...
  • Page 32 Manuale SLS-SLH1 2.8.2005 12:34 Pagina 31 General Description SLS - Refrigerant circuit of units with Shell and Tube evaporator and oil cooler Note: the units are equipped with two refrigeration circuits. Only one circuit is illustrated for the sake of simplicity. Safety devices: A HP pressure switch C Transducer...

  • Page 33: Power Supply And Control System

    Manuale SLS-SLH1 2.8.2005 12:34 Pagina 32 General Description SLH - Refrigeration circuit Nota: the units are equipped with two refrigeration Components: circuits. Only one cir- cuit is illustrated for the Screw compressor 10 Sight glass sake of simplicity. Flexible hose (absorber) 11 Thermostatic valve Silencer 12 Solenoid valve...

  • Page 34: Chiller Control

    Manuale SLS-SLH1 6.9.2005 10:59 Pagina 33 General Description 7.9 “Chiller Control” Remote wall terminal Makes it possible to control the unit through the re- The “ C hiller Control” unit consists of an expandable mote terminal, up to a maximum distance of 200 me- interface card and a controller.

  • Page 35: Technical Data

    Manuale SLS-SLH1 2.8.2005 12:34 Pagina 34 Technical data TECHNICAL DATA 8.1 Pressure drops Evaporator SLS SLS 1202 SLS 1402 SLS 1602 SLS 1802 SLS 1902 SLS 2002 SLS 2202 SLS 2402 19.3 19.3 13.2 Min. water flow rate 10.1 11.3 12.7 13.7...
  • Page 36 Manuale SLS-SLH1 2.8.2005 12:34 Pagina 35 Technical data Evaporator SLH SLH 1202 SLH 1402 SLH 1602 SLH 1802 SLH 1902 SLH 2002 SLH 2202 SLH 2402 19.3 19.3 13.2 Min. water flow rate 10.6 12.0 12.6 13.6 14.2 Nominal water flow rate 12.5 14.0 15.6...

  • Page 37: Technical Data

    Manuale SLS-SLH1 2.8.2005 12:34 Pagina 36 Technical data 8.2 Technical data SLS BLN/LN 1202 1402 1602 1802 1902 2002 2202 2402 Nominal voltage V/ph/Hz 400/3/50 Number of circuits Number of steps Capacity steps Refrigerant Type R407C Charge BLN (1) 38+38 49+49 45+45 59+59...
  • Page 38 Manuale SLS-SLH1 2.8.2005 12:34 Pagina 37 Technical data SLS BLN/LN 2602 3002 3402 3802 4202 3804 4004 Nominal voltage V/ph/Hz 400/3/50 Number of circuits Number of steps Capacity steps 12.5 12.5 Refrigerant Type R407C Charge BLN (1) 82+82 86+86 80+80 94+94 94+94 63+63/63+63 69+69/69+69...
  • Page 39 Manuale SLS-SLH1 2.8.2005 12:34 Pagina 38 Technical data SLS ELN/HET 1202 1402 1602 1802 1902 2002 2202 2402 Nominal voltage V/ph/Hz 400/3/50 Number of circuits Number of steps Capacity steps Refrigerant Type R407C Charge ELN (1) 38+38 44+44 51+51 59+59 63+63 69+69 74+74...
  • Page 40 Manuale SLS-SLH1 2.8.2005 12:34 Pagina 39 Technical data SLS ELN/HET 2602 3002 3402 3802 4202 3804 4004 Nominal voltage V/ph/Hz 400/3/50 Number of circuits Number of steps Capacity steps 12.5 12.5 Refrigerant Type R407C Charge ELN (1) 82+82 86+86 95+95 94+94 94+94 63+63/63+63 72+72/72+72...
  • Page 41 Manuale SLS-SLH1 2.8.2005 12:34 Pagina 40 Technical data SLH BLN/LN 1202 1402 1602 1802 1902 2002 2202 Nominal voltage V/ph/Hz 400/3/50 Number of circuits Number of steps Capacity steps Refrigerant Type R407C Charge BLN (1) 41+41 50+50 50+50 66+66 70+70 83+83 90+90 Charge LN (1)
  • Page 42 Manuale SLS-SLH1 2.8.2005 12:34 Pagina 41 Technical data SLH BLN/LN 2402 2602 2804 3204 3604 3804 Nominal voltage V/ph/Hz 400/3/50 Number of circuits Number of steps Capacity steps 12.5 12.5 12.5 12.5 Refrigerant Type R407C Charge BLN (1) 104+104 120+120 47+47/47+47 53+53/53+53 66+66/66+66 74+74/74+74 Charge LN (1) 104+104 120+120 47+47/47+47 53+53/53+53 66+66/66+66 74+74/74+74 Compressors...
  • Page 43 Manuale SLS-SLH1 2.8.2005 12:34 Pagina 42 Technical data SLH ELN/HET 1202 1402 1602 1802 1902 2002 2202 Nominal voltage V/ph/Hz 400/3/50 Number of circuits Number of steps Capacity steps Refrigerant Type R407C Charge ELN (1) 41+41 47+47 52+52 66+66 74+74 83+83 90+90 Charge HET (1)
  • Page 44 Manuale SLS-SLH1 2.8.2005 12:34 Pagina 43 Technical data SLH ELN/HET 2402 2602 2804 3204 3604 3804 Nominal voltage V/ph/Hz 400/3/50 Number of circuits Number of steps Capacity steps 12.5 12.5 12.5 12.5 Refrigerant Type R407C Charge ELN (1) 104+104 120+120 47+47/47+47 53+53/53+53 66+66/66+66 74+74/74+74 Charge HET (1) 104+104 120+120 47+47/47+47 53+53/53+53 66+66/66+66 74+74/74+74 Compressors...

  • Page 45: Electrical Data

    Manuale SLS-SLH2 2.8.2005 12:23 Pagina 44 Technical data 8.3 Electrical data SLS BLN/LN 1202 1402 1602 1802 1902 2002 2202 2402 Nominal voltage V(%)-ph-Hz 400 ±10% / 3 / 50 Nominal power input Max power input Nominal current Max. current (FLA) Max.
  • Page 46 Manuale SLS-SLH2 2.8.2005 12:23 Pagina 45 Technical data Unit Electrical Data SLS HET 1202 1402 1602 1802 1902 2002 2202 2402 Nominal voltage V(%)-ph-Hz 400 ±10% / 3 / 50 Nominal power input Max power input Nominal current Max. current (FLA) Max.
  • Page 47 Manuale SLS-SLH2 2.8.2005 12:23 Pagina 46 Technical data Fans Electrical Data Standard fans SLS BLN/LN 1202 1402 1602 1802 1902 2002 2202 2402 Power supply V-ph-Hz 400 ±10% / 3 / 50 Number n° Rated power per fan Max. absorbed current per fan Standard fans SLS BLN/LN 2602 3002...
  • Page 48 Manuale SLS-SLH2 2.8.2005 12:23 Pagina 47 Technical data Unit Electrical Data SLH BLN/LN 1202 1402 1602 1802 1902 2002 2202 Nominal voltage V(%)-ph-Hz 400 ±10% / 3 / 50 Nominal power input Max power input Nominal current Max. current (FLA) Max.
  • Page 49 Manuale SLS-SLH2 2.8.2005 12:23 Pagina 48 Technical data Unit Electrical Data SLH HET 1202 1402 1602 1802 1902 2002 2202 Nominal voltage V(%)-ph-Hz 400 ±10% / 3 / 50 Nominal power input Max power input Nominal current Max. current (FLA) Max.
  • Page 50 Manuale SLS-SLH2 2.8.2005 12:23 Pagina 49 Technical data Fans Electrical Data Standard fans SLH BLN/LN 1202 1402 1602 1802 1902 2002 2202 Power supply V-ph-Hz 400 ±10% / 3 / 50 Number n° Rated power per fan Max. absorbed current per fan Standard fans SLH BLN/LN 2402 2602...
  • Page 51 Manuale SLS-SLH2 2.8.2005 12:23 Pagina 50 Technical data 8.4 Position of antivibration mounting springs and weight distribution on supports SLS/SLH 1202-2002 BLN/LN SLS 2202-3402 BLN/LN - SLS 1902-3402 ELN/HET SLS/SLH 1202-1802 ELN/HET SLH 2202-2602 BLN/LN - SLH 1902-2602 ELN/HET ELECTRICAL BOARD Electrical Board ELECTRICAL BOARD Electrical Board...
  • Page 52 Manuale SLS-SLH2 2.8.2005 12:23 Pagina 51 Technical data SLS 1202 - 4004 BLN and LN Versions Distribution Weights (kg) Position Barycentre Shipping Operat. P1-P12 Position Weight Weight Al/Cu (kg) (kg) (kg) (kg) (kg ) (kg) (kg) (kg) (kg) (kg) (kg)
  • Page 53 Manuale SLS-SLH2 2.8.2005 12:23 Pagina 52 Technical data SLH 1202 - 3804 BLN and LN Versions Distribution Weights (kg) Position Barycentre Shipping Operat. P1-P8 Position Weight Weight Al/Cu (kg) (kg) (kg) (kg) (kg ) (kg) (kg) (kg) (kg) (kg) (kg) (kg) (kg) (kg)

  • Page 54: Overall Dimensions

    Manuale SLS-SLH2 2.8.2005 12:23 Pagina 53 Technical data 8.5 Overall dimensions SLS/SLH 1202 BLN/LN 2200 4030 SLS/SLH 1402-1602 BLN/LN - SLS/SLH 1202-1402 ELN/HET 2200 4030 Page 53...
  • Page 55 Manuale SLS-SLH2 2.8.2005 12:23 Pagina 54 Technical data SLS/SLH 1602-1802 ELN/HET - SLS/SLH 1802-1902-2002 BLN/LN 4030 2200 SLS/SLH 1902-2202 ELN/HET - SLS/SLH 2202-2402-2602 BLN/LN 2200 6030 Page 54...
  • Page 56 Manuale SLS-SLH2 2.8.2005 12:23 Pagina 55 Technical data SLS/SLH 2002-2402-2602 ELN/HET 22 00 60 30 6 00 SLS 3002 BLN/LN 2200 6030 2200 1800 Page 55...
  • Page 57 Manuale SLS-SLH2 2.8.2005 12:23 Pagina 56 Technical data SLS 3002-3402 ELN/HET - SLS 3402 BLN/LN 6030 2200 2200 1800 SLS 3802 BLN/LN 2200 8040 2200 1800 Page 56...
  • Page 58 Manuale SLS-SLH2 2.8.2005 12:23 Pagina 57 Technical data SLS 3802 ELN-HET - SLS 4202 BLN-LN 2200 8040 2200 1800 SLS 4202 ELN-HET 2200 8040 2200 1800 Page 57...
  • Page 59 Manuale SLS-SLH2 2.8.2005 12:23 Pagina 58 Technical data SLH 2804 BLN/LN/ELN/HET - SLH 3204 BLN/LN 2200 8405 4023 8040 SLH 3204 ELN/HET - SLH 3604-3804 BLN/LN/ELN/HET 8405 2200 4023 8040 Auxiliary Electrical Board Page 58...
  • Page 60 Manuale SLS-SLH2 2.8.2005 12:23 Pagina 59 Technical data Main SLS 3804-4004 BLN/LN/ELN/HET Electrical Board 8070 2200 4023 Auxiliary Electrical Board Page 59...

  • Page 61: Service Spaces

    Manuale SLS-SLH2 2.8.2005 12:23 Pagina 60 Technical data 8.6 Service spaces Units SLS/SLH All versions Installation of Single Units mm 3000 mm 2000 mm 2000 mm 2000 mm 2000 Installation of several Units WALL A 1.5 m 1.5 m WALL D WALL B WALL A 1.5 m...

  • Page 62: Maintenance

    Manuale SLS-SLH2 2.8.2005 12:23 Pagina 61 Maintenance MAINTENANCE Scheduled Maintenance Carefully read the “Safety” section of this manual before carrying out any maintenance operations. Do not discharge the refrigerant into the at- Operations mosphere while the refrigeration circuits are being drained. Use appropriate recov- ery equipment.

  • Page 63: Refrigerant Charge

    Manuale SLS-SLH2 2.8.2005 12:23 Pagina 62 Maintenance 9.3 Refrigerant charge After 8000 hours of work, carry out a visual in- spection on the suction/discharge valves for wear. If necessary, replace these components. If com- Do not inject refrigerant liquid into the LP pressors are started/stopped frequently or in par- side of the circuit.

  • Page 64: Fans

    Manuale SLS-SLH2 2.8.2005 12:23 Pagina 63 Maintenance 9.6 Fans – From the pressure gauge’s temperature scale, mea- sure the saturated suction temperature (Tsa) which corresponds to the pressure value. The fans of the condenser, of axial type, are com- plete with impeller with aerodynamic profile blades –...

  • Page 65: Troubleshooting

    Manuale SLS-SLH2 2.8.2005 12:23 Pagina 64 Troubleshooting 10 TROUBLESHOOTING The table below lists the anomalies of operation of the unit, the relevant causes and the corrective measures. For anomalies of any other type or not listed, contact one of Itelco-Clima’s Service Centre for technical assis- tance.
  • Page 66 Manuale SLS-SLH2 2.8.2005 12:23 Pagina 65 Troubleshooting Anomaly Cause Operation One or both compressors Breaking of the electric circuit. Check the electric circuit and detect are not working. any ground dispersions and short cir- cuits. Check fuses. Intervention of the HP pressure Reset the pressure switch and the con- switch.

  • Page 67: Spare Parts

    Manuale SLS-SLH2 2.8.2005 12:23 Pagina 66 Spare parts SPARE PARTS 11.1 Spare part list The table below shows the list of spare parts recom- mended during the first two years of operation. Component Number HP pressure switch Gas filter Thermostatic valve Auxiliary relays Fan’s fuses Compressor’s fuses...

  • Page 68: Dismantling, Demolition And Scrapping

    Manuale SLS-SLH2 2.8.2005 12:23 Pagina 67 Dismantling, Demolition and Scrapping 12 DISMANTLING, DEMOLITION After draining operations, the piping of the hydraulic networks can be disconnected and disassembled. AND SCRAPPING Once they have been disconnected as specified, the During the draining of the refrigeration cir- packaged units can be disassembled in a single cuits, do not let the refrigerant overflow in piece.
  • Page 69 Wesper S.A.S. 42, cours Jean-Jaurès 17800 PONS - FRANCE : +33-5 46 92 33 33  : +33-5 46 91 38 33 www.wesper.com  Your distributor : As part of our ongoing product improvement programme, our products are subject to change without prior notice. Non contractual...

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