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Lennox EMEA FLEXAIR 85 Installation, Operating And Maintenance

Air cooled rooftop packaged units
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INSTALLATION, OPERATING
AND MAINTENANCE
AIR COOLED ROOFTOP PACKAGED UNITS
FLEXAIR
85-220kW
FLEXAIR-IOM-2002-E

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  • Page 1 INSTALLATION, OPERATING AND MAINTENANCE AIR COOLED ROOFTOP PACKAGED UNITS FLEXAIR 85-220kW FLEXAIR-IOM-2002-E...

  • Page 3: Table Of Contents

    INSTALLATION OPERATION MAINTENANCE MANUAL Ref: FLEXAIR-IOM-2002-E INTRODUCTION................................... 1 GENERAL DESCRIPTION ................................1 SAFETY CODES & REGULATIONS .............................. 1 MACHINE DESIGNATION ................................. 1 EMC DIRECTIVE COMPLIANCE ..............................2 F-GAS REGULATION ................................. 2 WARRANTY ....................................2 NOTES FOR UNIT FITTED WITH GAS BURNER ........................... 3 SAFETY ....................................
  • Page 4 CO2 OR ADVANCED ENTHALPIC CONTROL PACK SENSOR ..................... 41 ECONOMISER AND EXTRACTION ............................42 COMMISSIONING ................................43 CASING CONDENSATION RISK ............................... 43 BEFORE TURNING ON THE POWER ............................43 POWERING THE UNIT ................................44 CLIMATIC™ CONFIGURATION ..............................45 FILTERS ..................................... 47 FILTER REPLACEMENT ................................

  • Page 5: Introduction

    INTRODUCTION INTRODUCTION All the technical and technological information contained in this manual, including any drawing and technical descriptions provided by us, remain the property of LENNOX and must not be used (except in operation of this product), reproduced, issued to or made available to third parties without the prior written agreement of LENNOX. GENERAL DESCRIPTION The FLEXAIR range of units is a roof cooling monoblock solution for the climatic comfort of premises.

  • Page 6: Emc Directive Compliance

    INTRODUCTION EMC DIRECTIVE COMPLIANCE WARNING: This equipment is a “B class” according EMC Directive. In an industrial environment, this device can create radio electrical noise. In this case, the owner can be asked to take appropriated actions. The units meet the following hardest environments standards: •...

  • Page 7: Notes For Unit Fitted With Gas Burner

    INTRODUCTION NOTES FOR UNIT FITTED WITH GAS BURNER THE UNIT MUST BE INSTALLED IN ACCORDANCE WITH LOCAL SAFETY CODES AND REGULATIONS AND CAN ONLY BE USED IN WELL VENTILATED AREA. IF MACHINE IS INCLUDING GAS BURNER, MINIMUM CLEARANCE AROUND THE UNIT MUST BE AT LEAST 8 M TO ALLOW A PROPER GAS FLUE DILUTION.

  • Page 8: Safety

    INTRODUCTION SAFETY The safety information contained in this manual is provided as a guide for the safe handling of this installation. LENNOX does not vouch for the completeness of this information and can therefore not accept liability for any possible omissions. In the roof tops, heat is being transported by a pressurized refrigerant, with changes in pressure and temperature.

  • Page 9: Safety Definition

    INTRODUCTION SAFETY DEFINITION The rooftops meet the following safety definitions, and is provided with CE markings if applicable (for further information see EU declaration). • EN-378-2016 Gas Equipment Regulation EU 2016/426 • 2006/42/EC “Machine Directive” (Directive 2014/35/EU relating to low voltages taken into account in the machine directive according to Annex 1 ̕...

  • Page 10: Labels

    INTRODUCTION LABELS The rooftop may be marked with the following warning labels to alert to potential hazards (on or near the potentially hazardous part). The rooftop may include the following labels High temperatures Electrical Voltage Rotating parts Sharp parts Warning Wear of PPE (Personal A2L: slightly flammable Don’t walk...

  • Page 11: Ped Directive

    INTRODUCTION PED DIRECTIVE All units are compliant with the PED directive. Warning: 1. Attention: The high-pressure safety switches are essential elements which guarantee the system remains within the admissible operating limits. Before switching on the installation, always ensure all electrical connections are correct on these elements which are used to isolate the electrical power supply to the compressor(s) they protect.

  • Page 12: Main Safety Recommendations

    INTRODUCTION MAIN SAFETY RECOMMENDATIONS All work on the unit must be carried out by a qualified and authorized employee. Non-compliance with the following instructions may result in injury or serious accidents. WORK ON THE UNIT: The risk analyses of our machines are carried out taking into account operation in a standard environment with unpolluted air. For any specific application (kitchen, industry ...) please contact your local sales representative.
  • Page 13 INTRODUCTION TRANSPORT – HANDLING • Never lift the unit without forklift protections • Remove the forklift protection before installation • An approach ramp must be installed if the unit’s installation requirements tell that it's necessary to reach the main switch. This recommendation is valid for installations in general and in particular for return and curbs.

  • Page 14: Delivery Checks

    INTRODUCTION DELIVERY CHECKS On receipt of a new equipment please check the following points. It is the customer’s responsibility to ensure that the products are in good working order: • The exterior has not been damaged in any way. • The lifting and handling equipment are suitable for the equipment and comply with the specifications of the handling instructions enclosed here-in.

  • Page 15: Operating Limits

    INTRODUCTION OPERATING LIMITS Heating mode Cooling mode Outdoor air temperature °C Outdoor air temperature °C Coil indoor inlet Coil indoor inlet temperature temperature °C °C MAINTENANCE KEY On delivery we recommend that you keep the key which is attached to an eyebolt in a safe and accessible place.

  • Page 16: Mandatory Handling Devices

    INTRODUCTION MANDATORY HANDLING DEVICES Handling slings to guide the unit towards the roofcurb Vacuum lifting beam to position the unit COMPLIANT NON COMPLIANT FLEXAIR-IOM-2002-E...

  • Page 17: Dimensions And Weights

    INTRODUCTION DIMENSIONS AND WEIGHTS FLEXAIR (Air cooled) View (F, G, H box) F BOX F BOX F BOX G BOX G BOX H BOX H BOX 2245 2245 2245 2243 2243 2259 2259 3314 3314 3314 4360 4360 5171 5171 1750 1750 1750...

  • Page 18: Lifting The Unit

    INTRODUCTION LIFTING THE UNIT As shown on the picture below, a lifting frame is necessary After lifting, withdraw angle’s feet and lifting lugs. Do not install the unit on the refrigeration side on roofcurb. FLEXAIR-IOM-2002-E...

  • Page 19: Installation

    INSTALLATION INSTALLATION FORKLIFT PROTECTIONS WARNING: NEVER LIFT THE UNIT WITHOUT FORKLIFT PROTECTIONS REMOVE THE FORKLIFT PROTECTIONS BEFORE INSTALLATION PRELIMINARY CHECKS Before installing the equipment, the following points MUST be checked: • Have the forklift protections been removed? • Is there sufficient space for the equipment? •...

  • Page 20: Connections

    INSTALLATION CONNECTIONS • Ensure that all the pipe-work crossing walls or roofs are secured, sealed and insulated. • To avoid condensation problems, make sure that all pipes are insulated according to the temperatures of fluids and type of crossed premises. NOTE: The protection sheets fitted to the finned surfaces must be removed prior to start up The customer must provide the necessary equipment in his installation to protect the power line that feeds our unit.

  • Page 21: Recommendations For Ducts Connections

    INSTALLATION RECOMMENDATIONS FOR DUCTS CONNECTIONS Some rules must be respected for the connections between ducts and unit done on site. Whatever the supply configuration is, respect a minimal duct’s length (D) of 2m before any elbow or any duct’s diameter change. Horizontal supply GOOD CONNECTION Vertical supply...

  • Page 22: Packing Long Distance (Option)

    INSTALLATION EXTRACTION: > 8m It is recommended to sheath the exhaust air by at least 8m (according to local regulations) to escape the fresh air inlet when the input-output are on the same side. General remarks: It is forbidden to walk on the machine. The machine must not be used to support the ducts.

  • Page 23: Custumer Wiring

    INSTALLATION CUSTUMER WIRING VERTICAL CUSTOMER WIRING Pass through the cable glands at the bottom of the electrical box. Drill through the insulation if necessary. WIRING WITH ROOFCURB WITHOUT EXTRACTION WIRING WITH ROOFCURB WITH EXTRACTION FLEXAIR-IOM-2002-E...
  • Page 24 INSTALLATION CUSTUMER HORIZONTAL WIRING F-BOX AND G-BOX (OPTION) To horizontally wire a Flexair F or G-BOX power supply, it must be placed on feet. Do not install the unit on mounts (fixed or antivibration) other than those provided by LENNOX. First, remove the 4 transport feet and the 2 sheath when the Flexair unit is lifted.
  • Page 25 INSTALLATION Complete the tightening of the feet screws. Connect the unit by the bottom as vertical wiring. FLEXAIR-IOM-2002-E...
  • Page 26 INSTALLATION CUSTUMER HORIZONTAL CABLING H-BOX To horizontally wire a Flexair H-BOX power supply, place metal cable glands in front, under the electrical cabinet. 1- Remove the indicated plate. 2- Drill the sheet to the diameter of the cable glands. It is recommended to use only one cable per cable gland. WARNING: cable glands must be in metal and not in plastic.

  • Page 27: Installation On A Roofcurb

    INSTALLATION ON A ROOFCURB INSTALLATION ON A ROOFCURB CAUTION: • Installation of the unit and accessibility must be compliant with the local regulations. Ensure that all access equipment allow maintenance operation in safety (electrical cabinet, main switch, panels, filter, refrigerant circuit…); this recommendation is valid for installations in general and in particular for return and curbs.

  • Page 28: Curbing And Flashing

    INSTALLATION ON A ROOFCURB CURBING AND FLASHING Check that the insulation is continuous, counter flash and seal around the frame as shown CAUTION: To be effective, the upstream must end below the drop edge. Where pipes and electrical conduits extend through the roof, flashing must conform to local codes of practice Before installing the equipment, make sure that seals are not damaged and check that the unit is secured to the mounting frame.

  • Page 29: Non Adjustable Non Assembled Roofcurb Installation

    INSTALLATION ON A ROOFCURB NON ADJUSTABLE NON ASSEMBLED ROOFCURB INSTALLATION FRAME PARTS IDENTIFICATION Figure below shows the different parts used in the assembly of this roof mounting frame. INSTALLATION The roof mounting frame provides support when the units are installed in down-flow configurations. The non-adjustable, non-assembled roof mounting frame can be installed directly on decks having adequate structural strength or on roof supports under deck.

  • Page 30: Transition Curb

    INSTALLATION ON A ROOFCURB TRANSITION CURB This roof curb will arrive as a packaged on a pallet and need to be built together. The part will be connected by special corrosion free nails. It is not possible to connect with standard nail equipment because there is a lot of power needed.

  • Page 31: Energy Recovery Installation

    ENERGY RECOVERY INSTALLATION ENERGY RECOVERY INSTALLATION ALL UNITS DIMENSIONS (mm) WEIGHT SIZE F-box 85-100-120 2146* 2063 1422 1796 525 kg G-box 150-170 2330* 2247 1518 2170 635 kg H-box 200-230 2516 2497 1676 2418 730 kg FLEXAIR-IOM-2002-E...
  • Page 32 ENERGY RECOVERY INSTALLATION STEP 1: SUPPLIED ROOFTOP CONFIGURATION NO HOOD NO PANEL Remove lifting lug Remove corner sheet metal STEP 2: LIFTING FLEXAIR-IOM-2002-E...
  • Page 33 ENERGY RECOVERY INSTALLATION STEP 3: FITTING STEP 4: CHECK SAME LEVEL 0 – 15 mm FLEXAIR-IOM-2002-E...
  • Page 34 ENERGY RECOVERY INSTALLATION STEP 5: FIXING H-box: for each side: H=10 x Ø4,8 x 32mm 5-10 mm F & G-box: for each side: F = 8 G = 8 X Ø 4, 8 x 25 mm FLEXAIR-IOM-2002-E...
  • Page 35 ENERGY RECOVERY INSTALLATION On top F = 13 G = 15 H = 15 X Ø 4, 8 x 25 mm STEP 6: MASTICATE Apply mastic on side junctions and higher junction FLEXAIR-IOM-2002-E...
  • Page 36 ENERGY RECOVERY INSTALLATION STEP 7: ELECTRICAL WIRING The Recovery module is sent with a power cable and a T- lan cable: MODBUS CABLE POWER CABLE Separate these 2 cables (communication and power ones) using the two holes. Then, attach the 2 cables to the grid of the extraction curb and insert them into the rooftop electrical panel.
  • Page 37 ENERGY RECOVERY INSTALLATION Then connect the power cable from the module to the rooftop, and the Modbus cable according to the bus connection wiring diagram (it could be connected to the BE (A1) connector in electrical rooftop panel or other options with bus communication): Extraction roofcurb connection Recovery module connection Actuator roofcurb connection...
  • Page 38 ENERGY RECOVERY INSTALLATION STEP 8: ROOF CURB ECONOMIZER ADJUSTMENT With Heat Recovery module option the extract air goes through the wheel, that’s why the economizer of the roofcurb has to be permanently fully closed. If roofcurb economizer is not fully closed, close it manually And don’t connect the actuator to the rooftop ACTUATOR ROOFCURB...

  • Page 39: Water Condensing

    WATER CONDENSING WATER CONDENSING WATER SOURCE HEAT PUMP ONLY WATER CONNECTIONS The water circulating pump will be preferably installed upstream so that the evaporator/condenser will be subjected to positive pressure. Inlet and Outlet water connections are indicated on the certified drawing sent with the unit or shown in the sales brochure.
  • Page 40 WATER CONDENSING ATER ANALYSIS The water must be analyzed, the water circuit installed must include all items necessary for treatment of the water: filters, additives, intermediate exchangers, bleed valves, vents, isolating valves etc... Depending on the results of the water analysis WARNING: We do not advise operation of the units with open loops which can cause problems with oxygenation, or operation with untreated ground water...
  • Page 41 WATER CONDENSING Drain the installation WARNING: It is important to make sure that manual or automatic air bleeders are installed at all the high points of the water circuit. To enable drainage of the circuit, make sure that drain cocks are installed at all the low points of the circuit. To drain the circuit, the drain cocks must be opened and an air inlet ensured.
  • Page 42 WATER CONDENSING VICTAULIC CONNECTION ASSEMBLY INSTRUCTION Be careful not to roll or pinch the seal when installing the half-shells. This would cause a leak. 1- Install the bolts and tighten the nuts by hand on them. 2- Tighten bolts uniformly passing from one side to the other, until the pads for the bolts are in metal-metal contact.
  • Page 43 WATER CONDENSING LOW WATER LOOP TEMPERATURE (OPTION) In order to operate with low water inlet temperature in cooling mode (ie: ground source water loops) it is necessary to control the water flow rate in the heat exchanger to maintain a minimum condensing pressure in the refrigeration circuit. In cooling mode the Climatic will control the water flow rate in the condenser by monitoring the condensing pressure and by closing the water flow valve accordingly by a 0-10 Volts signal.
  • Page 44 WATER CONDENSING Unit size Filter Curve FLEXAIR-IOM-2002-E...

  • Page 45: Sensor Mounting

    SENSOR MOUNTING SENSOR MOUNTING CO2 OR ADVANCED ENTHALPIC CONTROL PACK SENSOR The probe is delivered unassembled on the machine. The installer is responsible for mounting and connecting this sensor. The device can be installed in dry surroundings (IP20) by screws on the wall surface or on the standard flush mounting box.

  • Page 46: Economiser And Extraction

    ECONOMISER AND EXTRACTION ECONOMISER AND EXTRACTION ECONOMISER Free cooling is provided through the use of fresh air which is more appropriate than excessive cooling amounts of return air. The economizer is factory fitted and tested prior to shipment. It includes two dampers operating from a 24V actuator RAIN HOOD It also includes a factory fitted rain hood.

  • Page 47: Commissioning

    COMMISSIONING COMMISSIONING WARNING: all the components must be installed by a qualified engineer. Commissioning must only be carried out by Lennox authorized personnel. CASING CONDENSATION RISK Depending of the ambient outdoor conditions and the supply air performance of the unit, some condensation on the outside skin of the unit casing may appear.

  • Page 48: Powering The Unit

    COMMISSIONING WARNING: ensure that the power supply includes 3 phases with no neutral Ensure that the power supply between the building and the unit meets local authority standards and that the cable specification satisfies the start-up and operating conditions displayed on the rating plate. WIRE CONNECTION TIGHTNESS CHECKS WARNING: check the wire connection tightness before powering up the unit.

  • Page 49: Climatic™ Configuration

    COMMISSIONING CLIMATIC™ CONFIGURATION SETTINGS 1. Supply Air-flow adjustment (depending on customer requirements) a. 3333 = nominal air flow / pressure b. 3334 = reduced air flow / pressure c. 3332 = Manual/Automatic d. 3331 = Nominal/DeadZone/PartLoad/Pressure 2. Exhaust Air-flow adjustment (optional) a.
  • Page 50 COMMISSIONING CHECK: 1. Air-flow Vs Damper a. Test B.Nom100%: i. adjust the blower speed % (3333) to get the required air-flow ii. adjust the exhaust speed % (3864) to get the required air-flow b. Test B.Nom0%: i. adjust the damper compensation (3335) to maintain the required air-flow even with damper fully closed ii.

  • Page 51: Filters

    FILTERS FILTERS FILTER REPLACEMENT After opening the filter access panel, lift the filter retaining log. The filters can then be removed and replaced easily by sliding the dirty filters out and clean ones in. The CLIMATIC controller monitors the pressure drop across the filter.

  • Page 52: Fresh Air Wood

    FRESH AIR WOOD FRESH AIR WOOD INSTALLING The fresh air hood has to be opened and secured during commissioning. The 3 parts of the fresh air hood have to be assembled thanks to self taping screws delivered in the spare part box Check the proper position of the black seal on the top of the hood cover.

  • Page 53: Refrigerant Circuit

    REFRIGERANT CIRCUIT REFRIGERANT CIRCUIT GENERIC REFRIGERANT SKETCH Depending on the unit size or the selected options, the number of circuits and compressors can change. The specific principle diagram is at the end of the electrical diagram supplied with the unit. Some connection valves (Schrader type) are available to load/unload the circuit.
  • Page 54 REFRIGERANT CIRCUIT BEV- Indoor coil Temperature sensor Expansion valve Check valve Filter dryer BCD- Outdoor coil Low/High pressure switch Cycle reversal valve Compressor FLEXAIR-IOM-2002-E...

  • Page 55: Preheating Of The Crankcase Heaters

    REFRIGERANT CIRCUIT PREHEATING OF THE CRANKCASE HEATERS It’s important to avoid to start the compressors without preheating of the crankcase heaters. WARNING: In case of extended shutdown of the unit (> 6 hours), it is mandatory to power on the unit 8 hours minimum before to start the compressors equipped with crankcase heaters ELECTRONIC EXPANSION VALVE Different electronic valves types can be fitted on FLEXAIR range.

  • Page 56: Heating Option

    HEATING OPTION HEATING OPTION HOT WATER COIL HYDRAULIC CONNECTIONS Hot water coils offer fully modulating control through the use of a 3 way valve. The hot water coil, connections and valves are all tested at pressure of 15 bars. Frost protection is provided by forcing the opening the 3 way valve when supply temperature from hot water coil falls below 8°C and by stopping the outdoor fan when that supply temperature falls below 6°C.
  • Page 57 HEATING OPTION HOT WATER COIL CONNECTION F-G-H box PIPE INTERNAL DIAMETERS (DN) F-BOX G-BOX H-BOX Model designation F100 F120 F170 MAXIMUM WORKING PRESSURE: 8 BARS / MAXIMUM WORKING TEMPERATURE: 110°C FLEXAIR-IOM-2002-E...

  • Page 58: Electric Heaters

    WARNING: electric heater is connected heater to mains power – risk of electrical shock – switch off the unit prior to open this section FLEXAIR 85, 100 and 120: Standard heat: 30 kW, 2 stages Medium Heat: 54 kW, fully modulating (Triac)

  • Page 59: Gas Burner

    HEATING OPTION GAS BURNER PRELIMINARY CHECKS BEFORE START-UP NOTE: ANY WORK ON THE GAS SYSTEM MUST BE CARRIED OUT BY QUALIFIED PERSONNEL. THIS UNIT MUST BE INSTALLED IN ACCORDANCE WITH LOCAL SAFETY CODES AND REGULATIONS AND CAN ONLY BE USED IN PLANED INSTALLATION CONDITIONS FOR OUTDOOR.
  • Page 60 HEATING OPTION STARTING UP THE GAS BURNER Purge the pipe-work near the connection on the ignition control valve for a few seconds. • Check that the unit's treatment “Fan” blower is running. • Set the control to “ON” This will priorities the gas burner. •...
  • Page 61 HEATING OPTION PRESSURE REGULATOR ADJUSTMENT WITH 300MBAR GAS SUPPLY: • The Burner must run in High Heat mode for this check. • Place the tube of the “accurate” manometer on the Inlet press- sure port of the Gas Regulating Valve after having loosened the screw by one turn.
  • Page 62 HEATING OPTION LOW HEAT INJECTION PRESSURE CHECKS • Switch the control to Low Heat • Check and adjust if necessary the Outlet pressure: After the adjustment of the low heat, re-verify the high heat, re-position the stoppers and close the pressure ports Pressure adjustments table for each type of gas (mbar) Low Heat Injection Category...
  • Page 63 HEATING OPTION BURNER SAFETY CHECKS Smoke extractor pressure switch Test. • With the gas burner running, disconnect the flexible tube fitted to the pressure taping on the pressure switch • The Flame must disappear and the extraction fan must carry on running.
  • Page 64 HEATING OPTION GAS BURNER FIRE-UP SEQUENCE Operation from control Thermostat GAS =Closed Supply Thermostat Limit? (Auto Reset) Gas Low Pressure switch? Gas Ignition Control Block Signal Extraction Fan ON AIR Pressure Switch ON Backfire Thermostat ON? Pre-Ventilation 30 seconds Gas Control alve Closes Fire up Electrode 4s BURNER Gas Valve Open...
  • Page 65 HEATING OPTION GAS BURNER TROUBLESHOUTING If faults reported on CLIMATIC • Reset the CLIMATIC. • Check voltage: 230V after circuit breaker. • Check GAS isolation shut-off valves are open. • Check GAS pressure at the inlet of the GAS valves. It must be >20 mbar when the Burners shut down. •...
  • Page 66 HEATING OPTION DISASSEMBLING THE GAS BURNER FOR MAINTENANCE PURPOSES Preliminary Safety Recommendations • Isolate the unit using the main isolator switch. • Close off the isolating gas valve located before the unit. • Disconnect the Pipe-work. Do not discard the seals. Disassembling the gas «burner support bar»...
  • Page 67 HEATING OPTION Required Equipment List for maintenance Adjustment and Start- • An accurate manometer from 0 to 3500 Pa (0 to 350 mbar):0.1% full scale. • A Multimeter with Ohmmeter and Micro-amps scale • An Adjustable Spanner • Tube Spanner Set: 5, 7, 8, 9, 10, and 13. •...

  • Page 68: Maintenance Diagnostic

    MAINTENANCE DIAGNOSTIC MAINTENANCE DIAGNOSTIC REFRIGERATION FAULT POSSIBLE CAUSE AND SYMPTOMS SOLUTION Measure the superheat and sub-cooling Good if 5°C<SC<10°C and 5°C<SH<10°C Bad Refrigerant charge too low if SC>10°C and SH too low Check superheat adjustment and charge unit (a leak check must be carried out) In Heat Pump Mode the temperature difference between T outdoor and Tevap.
  • Page 69 MAINTENANCE DIAGNOSTIC REFRIGERATION FAULT POSSIBLE CAUSE AND SYMPTOMS SOLUTION Heat pump mode: Check the filter before the indoor coil measure and estimate the airflow rate increase the speed Incorrect airflow rates of the fan Cooling mode: Check the condenser fan Summer operation Several hours after the unit has stopped, Moisture or contaminants in the system...
  • Page 70 MAINTENANCE DIAGNOSTIC INDOOR FAN BLOWER FAULT POSSIBLE CAUSE AND SYMPTOMS SOLUTION Reduce the rotation speed of the fan Pressure drop in the ducting installation too Measure and estimate the airflow and High amps on action Fan motor low. pressure and compare with the specification from customer.
  • Page 71 MAINTENANCE DIAGNOSTIC WATER INFILTRATION FAULT POSSIBLE CAUSE AND SYMPTOMS SOLUTION Cooling mode: Check the air flow rate and reduce it if Water carried away from the coil because of necessary excessive airflow and speed on the coil. Low air pressure in the compartment due to Water found in the Check filter a high airflow rate or a high pressure drop...

  • Page 72: Maintenance Plan

    MAINTENANCE PLAN MAINTENANCE PLAN A maintenance booklet must be filled in and available for each LENNOX unit. These units are very robust but minimum regular maintenance is required. Some moving parts in the units can suffer from wear and tear and must be checked regularly (belts). Other parts can get clogged by dirt carried in the air (filters) and must be cleaned or replaced.
  • Page 73 MAINTENANCE PLAN + Half Task Operating mode Monthly + Quarterly Yearly Replace filters with new ones if disposable. Vacuum clean or blow the dirt. Wash and dry carefully. Replace Clean or replace filters: Filter if necessary by an original Lennox filter. •...
  • Page 74 MAINTENANCE PLAN + Half Task Operating mode Monthly + Quarterly Yearly Switch the unit to heat pump mode. Change the set Check defrost cycle with 4- point to obtain the standard defrost mode and reduce way valve inversion. the cycle time to the min value. Check the operation of the defrost cycle.
  • Page 75 MAINTENANCE PLAN + Half Task Operating mode Monthly + Quarterly Yearly Check the position of all • Check the good positioning and the fixation of all sensors. sensors Check the fresh air grilles (if fitted). If dirty or damaged, Check and clean if •...

  • Page 76: Warranty

    WARRANTY WARRANTY TERMS AND CONDITIONS In the absence of any other written agreement, the guarantee shall only apply to design faults which occur within a 12 month period (warranty period). The warranty period starts on the date of commissioning and at the latest six months after the delivery of the Rooftop. DO NOT CONFUSE THE WARRANTY WITH MAINTENANCE The warranty will only apply if a maintenance contract has been signed, starting from the date of commissioning, and if the maintenance contract has actually been performed.
  • Page 78 OTHER COUNTRIES : LENNOX DISTRIBUTION +33 4 72 23 20 20 Due to LENNOX EMEA ongoing commitment to quality, the specifications, ratings and dimensions are subject to change without notice and without incurring liability. FLEXAIR-IOM-2002-E Improper installation, adjustment, alteration, service or maintenance can cause property damage or personal injury.

This manual is also suitable for:

Flexair 100Flexair 120Flexair 150Flexair 170Flexair 200Flexair 230

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