Lennox EMEA INNOV CD-CU-CX Instructions For Installation, Use And Maintenance Manual Download Page 3

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General description

1.1

Structure

1.2

Application limits

1.3

Cooling circuit

1.4

Installation warnings

Inspection / Transport / Positioning

2.1

Inspection on receipt

2.2

Lifting and transport

2.3

Unpacking

2.4

Positioning

3 Installation

4 Supply water properties

5 Humidifier

6 Electrical connections

6.1

Generalities

7 Operating diagrams

8 Start-Up

8.1

Preliminary checks

8.2

Starting operations

9 Setting operating parameters

9.1

Generalities

Maintenance

10.1

10.2

Warnings
Generalities

Troubleshooting

•3•

INNOV@-DHF-IOM-0922-EN

Summary of Contents for INNOV CD-CU-CX

Page 1: ...www lennoxemea com INSTALLATION USE AND MAINTENANCE MANUAL INNOV DHF IOM 0922 EN INNOV DHF Chilled water CD CU CX Air Conditioning Units for Close Control Application ...

Page 2: ......

Page 3: ...nsport 11 2 3 Unpacking 11 2 4 Positioning 11 3 Installation 13 4 Supply water properties 15 5 Humidifier 17 6 Electrical connections 21 6 1 Generalities 21 7 Operating diagrams 23 8 Start Up 25 8 1 Preliminary checks 25 8 2 Starting operations 25 9 Setting operating parameters 27 9 1 Generalities 27 10 Maintenance 29 10 1 29 10 2 Warnings Generalities 29 11 Troubleshooting 33 3 INNOV DHF IOM 0922...

Page 4: ...mountable in few seconds thanks to an innovative hinge this is very important when units are installed in small corridors The exclusive use of primary brands components and a fully integrated development process CAD CAM CAE stands for highest possible quality level regarding efficiency reliability maintenance time pre and after sales support DH units can be ordered in different air flow configurat...

Page 5: ...nominal working conditions 240 3 Configuration A High water flow configuration B Middle water flow configuration C Low water flow configuration 4 Execution C Chilled water unit 5 Air flow D Downflow unit U Upflow unit X Displacement unit Example DH 040 A _ C D 1 2 3 4 5 5 INNOV DHF IOM 0922 EN ...

Page 6: ...ts DH_CD Table 2 Position Description Position Description 1 Chilled water coil 2 Water valve 3 Fan 4 Air filter 5 Stainless steel drain pan 6 Electrical pane 7 Electrical heaters 8 Humidifier 5 1 3 4 8 7 6 2 INNOV DHF IOM 0922 EN 6 ...

Page 7: ...acement unit components DH_CX Table 3 Position Description Position Description 1 Chilled water coil 2 Water valve 3 Fan 4 Air filter 5 Stainless steel drain pan 6 Electrical pane 6 3 5 2 4 1 7 INNOV DHF IOM 0922 EN ...

Page 8: ... non corroding materials The dray pan is made in stainless steel to ensure long time operation without damages All panels are thermally insulated with a polyurethane foam class 1 according to UL 94 norms this material thanks to the open cells gives good performances in sound absorption As an option sandwich panels are available in this case mineral fibres are closed between the panel and a second ...

Page 9: ...d are of the kind that trigger directly their efficiency will not be affected by any faults occurring in the microprocessor control circuit in compliance with 97 23 PED Microprocessor control The microprocessor built into the unit allows the different operating parameters to be controlled from a set of pushbuttons situated on the electric control board Alarm management o Dirty filters alarm option...

Page 10: ... way valve 2 way valve optional Table 5 Riferimento Descrizione Riferimento Descrizione 1 Inlet chilled water 2 Chilled water coil 3 Relief valve 4 Water valve 5 Outlet chilled water 6 Fan 1 2 3 4 5 6 1 2 3 4 5 6 INNOV DHF IOM 0922 EN 10 ...

Page 11: ...ola 3 vie Valvola 2 vie opzionale Table 6 Riferimento Descrizione Riferimento Descrizione 1 Inlet chilled water 2 Chilled water coil 3 Relief valve 4 Water valve 5 Outlet chilled water 6 Fan 1 3 4 5 6 2 4 3 1 5 1 3 4 5 6 2 4 3 1 5 11 INNOV DHF IOM 0922 EN ...

Page 12: ...ause hazardous situations during installation and maintenance work WARNING All work on the unit must be carried out by qualified personnel only trained to do their job in accordance with current laws and regulations Failure to comply with the rules provided in this manual or any modification made to the unit without prior authorisation will result in the immediate invalidation of the warranty WARN...

Page 13: ... or similar conveyance means should be used WARNING In all lifting operations make sure that the unit is securely anchored to prevent accidental falling or overturning 2 3 Unpacking The packing must be carefully removed to avoid the risk of damaging the unit Different packing materials are used wood cardboard nylon etc It is recommended to keep them separately and deliver them to suitable waste di...

Page 14: ...ot impeded by obstacles and or situations causing back suction Figure 5 Service area Table 7 Service area for downflow units DH_CD A mm B mm C mm D mm E mm 040 060 1010 750 890 10 2000 070 080 1270 750 890 10 2000 090 100 1760 750 890 10 2000 110 130 2020 750 890 10 2000 150 170 2510 750 890 10 2000 180 210 3160 750 890 10 2000 240 3160 750 960 10 2000 INNOV DHF IOM 0922 EN 14 ...

Page 15: ...llowing steps should be carried out to ensure proper installation Apply an anti vibration rubber lining between the unit and the bottom Position the unit on the floor floorstand base frame The recommended sizes for the power cables and emergency line are shown in the related electrical drawings attached Table 8 Service area for upflow units DH_CU A mm B mm C mm D mm E mm 040 060 1010 750 890 10 20...

Page 16: ...y the manufacturer listed The information refers to the use of exchangers made of copper If the concentration of some components will be out of range the customer has to introduce a correction otherwise the system will be out of warranty Table 10 Substance Concentration Alkalinity HCO3 70 300 ppm Sulphate SO4 2 70 ppm HCO3 SO4 2 1 0 ppm Electrical conductivity 10 500 μS cm Potential of hydrogen pH...

Page 17: ...1 ppm Generally a low pH value less than 6 increases the risk of corrosion and a high pH above 7 5 decreases the risk of corrosion Fe3 e Mn4 are powerful oxidants and may increase the risk of localized corrosion on stainless steel 17 INNOV DHF IOM 0922 EN ...

Page 18: ...r should be installed to trap any solid impurities The drain water is connected using a section of rubber or plastic hose resistant to 100 C with a recommended inside diameter of 32 mm The drain connector is suitable for heat sealing with polypropylene drainpipes WARNING The drain hose must be free without backpressure and with a drain trap immediately downstream of the connection to the humidifie...

Page 19: ...ll valve or cause foam when boiling Supply water The humidifier must be supplied with mains water with the following characteristics Pressure between 0 1 and 0 8 MPa 1 to 8 bar 14 5 to 116 psi Temperature between 1 and 40 C Instant flow rate not lower than the rated fill solenoid valve flow rate 0 6 l min Connection type 3 4 G Male Table 11 Limit values for the supply water with medium high conduc...

Page 20: ... Maximum Potential of hydrogen pH 7 8 5 Specific conductivity at 20 C σR 20 C 125 500 μS cm Total dissolved solids TDS mg l Dry residue at 180 C R180 mg l Total hardness TH CaCO3 50 250 mg l Temporary hardness CaCO3 30 150 mg l Iron Manganese Fe Mn 0 0 2 mg l Chlorides Cl 0 20 ppm Silica SiO2 0 20 mg l Residual chlorine Cl 0 0 2 mg l Calcium sulphate CaSO4 0 60 mg l Metallic impurities 0 0 mg l So...

Page 21: ...ogical point of view Adding disinfectants or corrosion inhibiters to water as these substances are potentially irritant Drain water Inside the humidifier the water boils and is transformed into steam without the addition of any substances The drain water as a result contains the same substances that are dissolved in the supply water yet in greater quantities depending on the concentration in the s...

Page 22: ...nsure said conditions will result in the immediate invalidation of the warranty The electrical connections must be made in accordance with the information shown in the wiring diagram provided with the unit and with current and local regulations An earth connection is mandatory The installer must connect the earthing wire using the earthing terminal situated on the electric control board yellow and...

Page 23: ...ompliance with EN specifications shall therefore be observed even for testing and trial conditions EN 50 178 Art 5 2 11 Regarding the differential protection that needs to be installed upstream it is necessary to use a type A switch that is sensitive to direct currents It is mandatory for it to have the following features Calibratable operation threshold Calibratable operation delay 23 INNOV DHF I...

Page 24: ...7 Operating diagrams Figure 7 Air flow DH_CD DH_CU DH_CX INNOV DHF IOM 0922 EN 24 ...

Page 25: ...switch on select the operating mode desired from the control panel and press the ON button on the control panel see software manual also If the unit fails to start up check if the service thermostat has been set according to the nominal values provided WARNIG You should not disconnect the unit from the power supply during periods when it is inoperative but only when it is to be taken out of servic...

Page 26: ...ed extraordinary maintenance and may be carried out BY QUALIFIED TECHNICIANS ONLY incorrect settings may cause serious damage to the unit and injuries to persons The operating parameters and control system settings configurable by means of the microprocessor control are password protected if they have a potential impact on the integrity of the unit Table 13 Setting of control devices Control devic...

Page 27: ...in this chapter MUST ALWAYS BE PERFORMED BY QUALIFIED PERSONNEL ONLY WARNING Before carrying out any work on the unit or accessing internal parts make sure you have disconnected it from the mains electricity supply WARNING Be especially careful when working in proximity to finned coils since the 0 11 mm thick aluminium fins can cause superficial injuries due to cuts WARNING After completing mainte...

Page 28: ...essary Operation Frequency Check the efficiency of all the control and safety devices Once a year Check the terminals on the electric control board to ensure that they are securely tightened The movable and fixed contacts of the circuit breakers must be periodically cleaned and replaced whenever they show signs of deterioration Once a year 10 2 Generalities To guarantee a constantly satisfactory p...

Page 29: ...side Figure 11 Relief valves in displacement units Figure 9 Inspecting the air filters in displacement units DH_CX Open the air filter compartment located in the plenum on the unit Pull out the air filters Check the condition of the filters and replace it if necessary 29 INNOV DHF IOM 0922 EN ...

Page 30: ...DH_CX The relief valves are accessible on frontal side Figure 11 Relief valves in displacement units INNOV DHF IOM 0922 EN 30 ...

Page 31: ...uits The electronic card is cut off from the power supply Check the fuses Alarms have been released Check whether any alarms are signalled on the microprocessor control panel eliminate the causes and restart the unit The phase sequence is wrong Check the phase sequence relay Invert the phases on the terminal board after disconnecting the unit and contact the manufacturer Air in the hydraulic circu...

Page 32: ... respecter ses engagements Lennox s efforce de fournir des informations les plus précises Néanmoins les spécifications valeurs et dimensions indiquées peuvent être modifiées sans préavis sans engager la responsabilité de Lennox Une installation un réglage une modification un entretien ou une opération de maintenance inappropriés peuvent endommager le matériel et provoquer des blessures corporelles...

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