Related Manuals for Lennox Adnova THS Series
Summary of Contents for Lennox Adnova THS Series
- Page 1 INSTALLATION, OPERATING AND MAINTENANCE CEILING MOUNTED SPLIT UNIT @DNOVA 2,5 - 38 kW ADNOVA-THS_R410A- IOM-1304-E www.lennoxemea.com...
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Page 3: Table Of Contents
Index General Description ......................2 1.1 Structure ............................2 1.2 Field of application ........................... 2 1.3 Cooling circuit ..........................2 1.4 Installation warnings ........................5 Inspection / Transport ......................6 2.1 Inspection on receipt ........................6 2.2 Lifting and transport ......................... 6 2.3 Unpacking ............................ -
Page 4: General Description
55 °C / 90% R.H. Max. Cooling circuit The entire cooling circuit is built in the Lennox factory using only components of the finest quality brands and processes conforming to the specifications of “Directive 97/23” for brazing and testing. Compressors On THS units are installed only primary brand scroll compressors of leading international manufacturers. - Page 5 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: Switching ON/OFF of compressor to maintain the temperature set point “T” inside the shelter. •...
- Page 6 THS025-035 Pos. Description Pos. Description Compressor Sight glass Condenser Low pressure switch (LP) Capillary tupe High pressure switch (HP) Evaporator Condensing pressure probe Filter dryer THS045-056-073-090-105-120-145-310-380 Pos. Description Pos. Description Compressor High pressure switch (HP) Condenser Condensing pressure probe Thermostatic valve Evaporator Liquid receiver Filter dryer...
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Page 7: Installation Warnings
Installation warnings General rules • When installing or servicing the unit, you must strictly follow the rules provided in this manual, comply with the directions on the units themselves and take all such precautions as are necessary. • The fluids under pressure in the cooling circuit and the presence of electrical components may cause hazardous situations during installation and maintenance work. -
Page 8: Inspection / Transport
On receiving the unit, check that it is perfectly intact: the unit left the factory in perfect conditions; immediately report any signs of damage to the carrier and note them on the Delivery Slip before signing it. Lennox or its Agent must be promptly notified of the entity of the damage. -
Page 9: Installation
Installation The THS package air-conditioning unit is suitable for all environments except aggressive ones. Do not place any obstacles near the units and make sure that the air flow is not impeded by obstacles and/or situations causing back suction. THSI - Indoor unit positioning Bear in mind the following aspects when choosing the best site for installing the unit and the relative connections: •... -
Page 10: Free-Cooling Duct Connections (Optional)
THSI THSI unit unit Model (mm) (mm) (mm) (mm) THSI 025-035-045-056-073-090-105-120-145-310-380 Free-cooling duct connections (optional) The air conditioner may be supplied with an integrated free-cooling device (optional), which uses fresh air from outside to cool the ambient without starting up the compressor. The device supplies the correct cooling capacity required, through a modulating motor damper. -
Page 11: Refrigerant Connections
Refrigerant connections THIS OPERATION MUST BE CARRIED OUT BY AN EXPERT TECHNICIAN. Keep refrigerant lines as short as possible and use the suggested diameter and the indication of the “Piping Design Criteria” (attached to the unit documentation) Lines positioning Connect the air conditioner to the condensing unit by using refrigerant lines in hard or soft copper. •... -
Page 12: Ths - Evacuation And Charging Operations
THS - Evacuation and Charging Operations This type of work must be carried out by qualified personnel only trained to do their job in accordance with current laws and regulations. Introductions The simultaneous presence of liquid and vapour makes it necessary for both to be in a state of saturation ( Gibbs law ), as shown in Fig. -
Page 13: Evacuating A Circuit "Contaminated" With Refrigerant
Evacuating a circuit “contaminated” with refrigerant The first step is to remove the refrigerant from the circuit. To do this a specific machine is necessary with a drying compressor in order to recover the refrigerant. Refrigerants all tend to dissolve in oil (compressor sump). The Fig. 5 illustrates a specific property (Charles’ Law) of gases, which are more soluble in liquids as the pressure increases but less soluble as the temperature increases. -
Page 14: Electrical Connections
Electrical Connections Generalities Before carrying out any job on electrical parts, make sure the power supply is disconnected. Check that the mains electricity supply is compatible with the specifications (voltage, number of phases, frequency) shown on the unit rating plate. The power connection for single-phase loads is to be made with a three-pole cable and “N”... - Page 15 MAIN ELECTRICAL PANEL Legend: = Power supply for internal unit (THSI); = Power supply for external unit (THSC); = Auxiliary cables. @DNOVA THS_R410A-IOM-1304-E...
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Page 16: Starting Up
Starting Up Preliminary checks • Check that the electrical connections have been made properly and that all the terminals are securely tightened. This check should also be included in a periodic six-month inspection. • Check that the voltage at the RST terminals is 230± 5% or 400 V ± 5% and make sure the yellow indicator light of the phase sequence relay is on. -
Page 17: Start Up
Electrical connection • Open the frontal panel of the two units. • Turn THSI unit QS main switch OFF. • Switch OFF THSC unit Q01 automatic switch. • Insert the power supply cable using one of the special holes you can find on THSI unit sides and connect it to QS main switch. -
Page 18: Checks During Operation
Checks during operation Check the phase sequence relay on the control board to verify whether the phases occur in the correct sequence: if they do not, disconnect the unit from power supply and invert two phases of the incoming three-pole cable. Never attempt to modify internal electrical connections: any undue modifications will immediately invalidate the warranty. -
Page 19: Operating Parameters Setting
Operating Parameters Setting Generalities All the control devices are set and tested in the factory before the unit is dispatched. However, after the unit has been in service for a reasonable period of time you can perform a check on the operating and safety devices. The settings are shown in Tab. -
Page 20: Maintenance
Maintenance The only operations to be performed by the user are to switch the unit On and Off. All other operations are to be considered maintenance work and must thus be carried out by qualified personnel trained to do their job in accordance with current laws and regulations. Warnings All the operations described in this chapter MUST ALWAYS BE PERFORMED BY QUALIFIED PERSONNEL ONLY. - Page 21 Fig. 7 Inspecting the air filter Remove the grilled panel to access the damper and air filter compartment. Pull out the air filter. Check the condition of the filter and replace it if necessary. Grilled panel Air filter Fig. 8 Inspecting the damper servomotor Remove the grilled panel to access the damper and air filter compartment.
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Page 22: Repairing The Cooling Circuit
Repairing the cooling circuit Warning: While performing repairs on the cooling circuit or maintenance work on the compressors, make sure the circuit is left open for as little time as possible. Even if briefly exposed to air, ester oils tend to absorb large amounts of humidity, which results in the formation of weak acids. If the cooling circuit has undergone any repairs, the following operations must be carried out: •... -
Page 23: Recharging With Refrigerant R410A
A unit that was originally charged with (nitrogen) in the factory must not be charged with R22 or other refrigerants without the written authorization Lennox Environmental protection The law implementing the regulations (reg. EEC 2037/00) which govern the use of ozone-depleting substances and... -
Page 24: Troubleshooting
Troubleshooting On this pages you will find a list of the most common reasons that may cause the package unit to fail or any malfunction. This causes are broken down according to easily identifiable symptoms. You should be extremely careful when attempting to implement any of the possible remedies suggested: overconfidence can result in injuries, even serious ones, to inexpert individuals. - Page 26 LENNOX DISTRIBUTION +33 4 72 23 20 20 +33 4 72 23 20 20 Due to LENNOX EMEA ongoing commitment to quality, the specifi cations, ratings and dimensions are subject to change without notice and without incurring liability. ADNOVA-THS_R410A- Improper installation, adjustment, alteration, service or maintenance can cause property damage or personal injury.