Carrier 50FF 020 Installation, Operation And Maintenance Instructions
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Carrier 50FF 020 Installation, Operation And Maintenance Instructions

Packaged rooftop units
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I N S TA L L AT I O N , O P E R AT I O N A N D
M A I N T E N A N C E
I N S T R U C T I O N S
Packaged rooftop units
50FF/FC 020-093
Nominal cooling capacity R-410A 22.3 - 90.2 kW
Nominal heating capacity R-410A 21.9 - 89.7 kW
Nominal cooling capacity R-454B 36.0 - 90.4 kW
Nominal heating capacity R-454B 35.9 - 89.6 kW
Translation of the original document 80185, 03.2022

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  • Page 1 I N S TA L L AT I O N , O P E R AT I O N A N D M A I N T E N A N C E I N S T R U C T I O N S Packaged rooftop units 50FF/FC 020-093 Nominal cooling capacity R-410A 22.3 - 90.2 kW...

  • Page 2: Table Of Contents

    CONTENT 1 - INTRODUCTION .................................... 3 2 - SAFETY ADVISE ................................... 3 2.1 - General safety advise.................................. 3 2.2 - Safety standards for refrigerant ..............................4 3 - POSSIBLE TYPES OF ASSEMBLIES ............................5 4 - TRANSPORT ....................................7 4.1 - Transport ..................................... 7 4.2 - Receipt of goods ..................................

  • Page 3: Introduction

    1 - INTRODUCTION The 50FF/FC packaged rooftop range consists of autonomous - Pressure Equipment Directive 2014/68/EU (PED): compact air-air units of horizontal design, rooftop type. • R-410A: Category 2 ■ 50FF series R-410A: for cooling-only operation. • R-454B: Category 3 ■...

  • Page 4: Safety Standards For Refrigerant

    2 - SAFETY ADVISE 2.2 - Safety standards for refrigerant hydrogen chloride and other toxic compounds. These compounds Important: These units contain a fl uorinated greenhouse gas may produce severe physiological consequences if accidentally covered by the Kyoto protocol. inhaled or swallowed. All interventions on the refrigerating circuit must be performed in accordance with applicable legislation.

  • Page 5: Possible Types Of Assemblies

    3 - POSSIBLE TYPES OF ASSEMBLIES Depending on the indoor airfl ow direction B assemblies: “Standard” (all models): R-410A and R-454B B1 assembly B2 assembly BF assembly Standard Economizer, 2 dampers: fresh air damper 100% fresh air interlocked with return damper S’’...
  • Page 6 3 - POSSIBLE TYPES OF ASSEMBLIES Depending on the indoor airfl ow direction R assemblies: “in-line” (models 052 to 062): R-410A only R1 assembly, Direction 0 R2 assembly, Direction 0 RP assembly, Direction 0 “In-line” standard Economizer, 2 dampers: fresh air damper Lower return plug-fan interlocked with return damper R1 assembly, Direction 2...

  • Page 7: Transport

    Do not approach the container or truck in the presence of an open 01120, MONTLUEL, France UK Importer: Toshiba Carrier UK Ltd, Porsham Close, fl ame, an electrical power source, a mobile phone, or any other Roborough, Plymouth, PL6 7DB Contient des gaz à...

  • Page 8: Discharge Via Forklift Truck

    5 - HANDLING 5.1 - Discharge via forklift truck pieces height and then, set down it carefully on the fl oor. Finally, The unit is designed to be transported safely by using a forklift truck. The base features guide rails to accommodate the forks remove the fi...
  • Page 9 5 - HANDLING Important: all rigging points must be used Important: The centre of gravity is not necessarily in the middle of the unit and the forces applied to the slings are not always identical. Please consult the weight and the centre of gravity of each model stated in paragraph 7.6. Confi...

  • Page 10: Operation Limits

    6 - OPERATION LIMITS Cooling Heating Inlet air conditions 50FF 50FC 50FC Minimum temperature 9,7ºC WB 10ºC (1) With a condensation pressure control disabled operation up to Indoor coil Maximum temperature 24ºC WB 27ºC +12ºC. (2) When the outdoor temperature is usually below 5ºC WB, the Minimum temperature -10ºC (1) -15ºC WB (2)
  • Page 11 7 - POSITIONING AND INSTALLATION Minimum area for indoor air distribution Sound Level The unit with refrigerant R-454B (A2L fl uid) needs a minimum These units are designed to work with a low acoustic level. In any surface in the room where the air supplied by its indoor circuit will case, the following must be taken into account for the design of be distributed, according to EN-378-1: the installation: the outdoor environment for acoustic radiation, the...

  • Page 12: Antivibrators Assembly (Silent-Blocks)

    7 - POSITIONING AND INSTALLATION 7.3 - Antivibrators assembly (silent-blocks) The screws required for the installation of the silent-blocks are Although the installer is the one who must decide on a case-by- not supplied from the factory. case basis the best way to place the unit in the ultimate location, always in observation of the handling standards that have been These screws must have an adequate quality to withstand the described, below is a proposed assembly sequence that may...

  • Page 13: Pre-Assembly Roofcurb (Optional)

    7 - POSITIONING AND INSTALLATION 7.4 - Pre-assembly roofcurb (optional) The “Standard” assemblies can rest on standardised pre-assembly roofcurbs with adjustable height, built in galvanised steel panelling with polyester paint and thermal insulation. The levelling system uses angle pieces that allow adjustments in the X and Y axes. As a result, the unit will be perfectly levelled on a sloping roof.
  • Page 14 7 - POSITIONING AND INSTALLATION Handling For transport and lifting up to the roof using a crane, a rocker arm as well as approved slings, both suitable for the dimensions and 50FF/FC weight of the roofcurb, must be used. These slings will be hooked roofcurb (mm) (mm)
  • Page 15 7 - POSITIONING AND INSTALLATION Position A Position B Self-adhesive rubber gasket of 9 mm Supply Return Return Supply Position C Position D (NO) Insulation of 9 mm on the ducts of Upper profi le of 40 supply and return mm for waterproof sealing Note: Position A is best suited for gas burner roofcurb.
  • Page 16 7 - POSITIONING AND INSTALLATION Air ducts connections Side view after installation on roof (position C): Standard roofcurb For units with vertical airfl ow, the ducts must be connected to the profi les from underneath the roofcurb. In order to carry out the air ducts follow the recommendations in the paragraph 9.4 “Air ducts connections”.

  • Page 17: Change In The Airfl Ow Direction

    7 - POSITIONING AND INSTALLATION Positioning the unit on the roofcurb Important: All roofcurb are supplied with a return safety grille intended for plenum installations. For installations with ducted Once the previous work has been carried out, the machine can return, the grille must be removed prior to place the machine on be mounted on the roofcurb.
  • Page 18 7 - POSITIONING AND INSTALLATION Return Note: the screws securing this structure are used to fi x the locking part to the base of the unit. The screws required to secure the The access panel to the return outlet features profi...

  • Page 19: Centres Of Gravity, Weight And Reactions In The Supports

    7 - POSITIONING AND INSTALLATION 7.6 - Centres of gravity, weight and reactions in the supports: 50FF series (“Standard”) B1 assembly 50FF Centre of gravity (mm) Weight Reactions in the supports (kg) (kg) 1.083 1.066 1.048 119 183 1.050 118 183 1.049 119 185 1.049...
  • Page 20 7 - POSITIONING AND INSTALLATION 7.6 - Centres of gravity, weight and reactions in the supports: 50FF series (“Standard”) B1 assembly 50FF Centre of gravity (mm) Reactions in the supports (kg) Weight (kg) 1.377 1.046 147 227 106 132 211 1.377 1.046 150 230 108 134 215...
  • Page 21 7 - POSITIONING AND INSTALLATION 7.6 - Centres of gravity, weight and reactions in the supports: 50FF series (“Standard”) B1 assembly 50FF Centre of gravity (mm) Weight Reactions in the supports (kg) (kg) 1.628 1.054 1.035 173 256 112 158 241 1.628 1.054 1.059 176 261 115 161 246...
  • Page 22 7 - POSITIONING AND INSTALLATION 7.6 - Centres of gravity, weight and reactions in the supports: 50FF series (“In-line”) R1 assembly 50FF Centre of gravity (mm) Weight Reactions in the supports (kg) (kg) 1.402 1.104 144 232 108 145 234 110 1.399 1.107 147 237 110 149 239 112...
  • Page 23 7 - POSITIONING AND INSTALLATION 7.6 - Centres of gravity, weight and reactions in the supports: 50FC series (“Standard”) B1 assembly 50FC Centre of gravity (mm) Weight Reactions in the supports (kg) (kg) 1.083 1.066 1.048 119 183 1.050 118 183 1.049 119 185 1.049...
  • Page 24 7 - POSITIONING AND INSTALLATION 7.6 - Centres of gravity, weight and reactions in the supports: 50FC series (“Standard”) B1 assembly 50FC Centre of gravity (mm) Reactions in the supports (kg) Weight (kg) 1.377 1.046 159 245 114 142 228 1.377 1.046 159 244 114 142 228...
  • Page 25 7 - POSITIONING AND INSTALLATION 7.6 - Centres of gravity, weight and reactions in the supports: 50FC series (“Standard”) B1 assembly 50FC Centre of gravity (mm) Weight Reactions in the supports (kg) (kg) 1.628 1.054 1.146 191 283 124 174 266 107 1.628 1.054 1.146 191 283 124 174 266 107...
  • Page 26 7 - POSITIONING AND INSTALLATION 7.6 - Centres of gravity, weight and reactions in the supports: 50FC series (“In-line”) R1 assembly 50FC Centre of gravity (mm) Weight Reactions in the supports (kg) (kg) 1.402 1.104 1.044 154 249 116 156 251 118 1.399 1.107 1.050 155 250 116 158 253 118...

  • Page 27: Recommended Service Clearance

    7 - POSITIONING AND INSTALLATION 7.7 - Recommended service clearance Important: This is the minimum space required for maintenance operations and access inside the unit. Depending on the assembly selected for the unit and the characteristics of the installation site, a larger space around it may be required to ensure proper air circulation and therefore the correct operation of the unit.
  • Page 28 7 - POSITIONING AND INSTALLATION 7.7 - Recommended service clearance Important: This is the minimum space required for maintenance operations and access inside the unit. Depending on the assembly selected for the unit and the characteristics of the installation site, a larger space around it may be required to ensure proper air circulation and therefore the correct operation of the unit.
  • Page 29 7 - POSITIONING AND INSTALLATION 7.7 - Recommended service clearance Important: This is the minimum space required for maintenance operations and access inside the unit. Depending on the assembly selected for the unit and the characteristics of the installation site, a larger space around it may be required to ensure proper air circulation and therefore the correct operation of the unit.

  • Page 30: Electrical Connection

    8 - ELECTRICAL CONNECTION 8.1 - Installation norms it features (refer to the technical brochure and the name plate). Important: All connections in the site are the responsibility - The distance between the unit and its power source. of the installer. These connections are always made as - The protection to be placed at the power source.

  • Page 31: 50Fc" Electronic Control

    8 - ELECTRICAL CONNECTION 8.5 - “50FC” electronic control These latches of stainless steel have triangular insert 8 mm (supplied wrench). The closing is done “50FC” electronic control is basically comprised of a control board, by rotating 90º (anti-clockwise): it brings the latch to sensors, a graphic terminal, an user terminal (optional), a touch the locked position.

  • Page 32: Location Of Sensors On The Machine

    8 - ELECTRICAL CONNECTION 8.6 - Location of sensors on the machine - Fasten the rear of the sensor case to the panel or the wall (for fastening the case, use the screws supplied with the Unit 1 circuit fastening kit, paying attention to use the proper spacers, to not damage the sensor’s electronics).
  • Page 33 8 - ELECTRICAL CONNECTION - This probe must be fi xed to the interior wall of the room to Humidity probe position be conditioned, at ca. 1.5 m height in the room and at least 50 cm from the next wall. - It should never be mounted: •...

  • Page 34: Fans And Air Ducts

    9 - FANS AND AIR DUCTS 9.1 - Checks in the axial fans 9.2 - Checks in the EC plug-fans ■ Before commissioning, check the blade rotation direction and ■ Before commissioning, check the blade rotation direction and that the axis turns without strokes nor vibrations. that the axis turns without strokes nor vibrations.

  • Page 35: Air Ducts Connections

    9 - FANS AND AIR DUCTS Pulley and belt calibration Attention: Before performing these operations, it is - e = pulley centre distance in mm necessary to verify that the unit is disconnected from - E = see table below for the value mains.

  • Page 36: Condensate Drain

    10 - CONDENSATE DRAIN These units are equipped with a condensate drain pan in the Important: the water drain pipe must CONNECT SIPHON indoor circuit, with a 1/2” M gas threaded plastic drain connection. be provided with a siphon to avoid bad METTRE SIPHON smell and water spills.

  • Page 37: Safety Elements

    11 - SAFETY ELEMENTS High pressure switch ■ High temperature safety in tandem compressors (optional): Working in COOLING mode, when the outdoor coil pressure Connected to the compressor discharge, it will stop its operation of a circuit overcomes a limit value one of the two compressors when the pressure at that point reaches the setpoint.
  • Page 38 11 - SAFETY ELEMENTS R-454B Refrigerant leak detector (standard) Anti-fi re safety Due to the A2L category of refrigerant R-454B (lightly fl ammable), it The electronic control can activate an anti-fi re safety device that requires the installation of a refrigerant leak detector. This detector detains the unit when the return air surpasses a temperature of uses infrared instead of semiconductor technology with no need 60°C (by default).

  • Page 39: Factory Options And Accessories

    12 - FACTORY OPTIONS AND ACCESSORIES 12.1 - Dampers hoods Self-tapping hex screws ■ Depending on the assembly chosen, the fresh air and exhaust air damper hoods are supplied folded down, to be fi tted on site by the installer. Caution: the detachment of the hood due to wrong implementation of the above steps may cause personal injury and property damage.

  • Page 40: Fresh Air Housing (B3, Bx, Bp, Ba, Bw, Rp 070 To 093, Rw Assemblies)

    12 - FACTORY OPTIONS AND ACCESSORIES The following image shows the droplet eliminator placed: Important: Silicone should be applied to the joining area of the the fresh air housing with the machine, to prevent water entry and ensure tightness. All the screws required for this assembly are supplied in a bag. 12.3 - Fresh air housing (B3, BX, BP, BA, BW, RP 070 to 093, RW assemblies) The fresh air housing is supplied disassembled with the unit, for...

  • Page 41: Heat Recovery Wheel Module (Bw And Rw Assemblies)

    12 - FACTORY OPTIONS AND ACCESSORIES 12.4 - Heat recovery wheel module (BW and RW assemblies) Transport and handling 8x40 hex screws The module with the heat recovery wheel and its support bed are supplied disassembled with the unit, for installation on site. ■...
  • Page 42 12 - FACTORY OPTIONS AND ACCESSORIES ■ For transport and lifting up to the roof using a crane, a rocker Initial location of the cables for connection: arm as well as approved slings must be used. These slings will 50FF/FC unit Return fans Recovery be hooked on the anchorage points intended for this purpose...

  • Page 43: Enclosure For Lower Return (Models 052 To 062 With R2 Assembly)

    12 - FACTORY OPTIONS AND ACCESSORIES 12.5 - Enclosure for lower return (models 052 to 062 with R2 assembly) Models 052 to 062 with R2 assembly are supplied factory-set with All these parts are fi tted to the unit using 4.8 self-tapping hex a lateral air return.

  • Page 44: Air Fi Lters

    12 - FACTORY OPTIONS AND ACCESSORIES ■ Finally, raise the hoods and secure the side parts. “In-line” assemblies Left-hand panels 10x30 hex screws Access panel Electrical connection to be made by the costumer: ■ These units include G4 gravimetric fi lters standard type, which can be replaced by: Note: see the wiring diagram included with the unit for a more detailed information about the wiring.

  • Page 45: Heat Recovery Coil

    12 - FACTORY OPTIONS AND ACCESSORIES 12.8 - Heat recovery coil This option is compatible with B1, B2, BF, BT, BB, R1 and R2 Note: see the wiring diagram included with the unit for a more assemblies. detailed information about the wiring. ■...

  • Page 46: Electrical Heaters

    12 - FACTORY OPTIONS AND ACCESSORIES 12.9 - Electrical heaters ■ The electrical heaters incorporate safety thermistors for ■ The auxiliary electrical heaters are ready for operation in two power stages. This heaters are managed by the electronic protection of the unit against excess temperature. One of them control of the unit that can activate them in the following cases: has automatic reset and tare value at 65ºC, the other one has - As a backup in HEATING mode, following the input of all the...

  • Page 47: Preheater Module

    12 - FACTORY OPTIONS AND ACCESSORIES 12.11 - Preheater module With BF assembly, 100% fresh air, it is possible to incorporate a preheater module (electrical heater) coupled to the fresh air intake. This module is supplied in kit for installation on site. Electronic control manages this electrical heater with proportional control.

  • Page 48: Hot Water Coil

    12 - FACTORY OPTIONS AND ACCESSORIES 12.12 - Hot water coil ■ Hot water coil with a three-way valve managed by the electronic The position of the sheet metal precuts on the side panel are control of the unit. The water coil could be activated in the shown in the following diagrams.

  • Page 49: Gas-Fi Red Condensing Boiler (Only With R-410A)

    12 - FACTORY OPTIONS AND ACCESSORIES - Pour more water into the circuit and repeat the previous steps. - Condensate drain with siphon. - Activate the water pump (to be foreseen by the installer, - Forced draught. except with the “Very low outdoor temperature” option) and - Electronic ignition.
  • Page 50 12 - FACTORY OPTIONS AND ACCESSORIES This manual and the manufacturer’s manual must be kept 1- Technical data plate: with care. If it is lost or damaged, please contact the Technical This plate indicates the technical and performance data. Assistance Service for a new copy. Gas type: Category: The thermal module, before being connected to the hydraulic...
  • Page 51 12 - FACTORY OPTIONS AND ACCESSORIES Boiler layout Installation of the boiler The boiler is supplied disassembled with the 50FF/FC unit, for installation on site. The hydraulic circuit is assembled inside the 50FF/FC unit. The installer must connect the connecting piping with the boiler. Note: all this piping system is sent packed together with the boiler.
  • Page 52 12 - FACTORY OPTIONS AND ACCESSORIES Step 2: Replace the panel (1). The following image shows the Step 4: Drop the boiler on the bracket (6) and screw on the four panel by the outer side of the 50FF/FC unit. Then fi x the clamps fi...
  • Page 53 12 - FACTORY OPTIONS AND ACCESSORIES Gas connections Optionally, a kit with all the fl ue gas accessories can be supplied: The gas connection must be made respecting the installation DN80 DN110 regulations in force, and sized to ensure the correct gas delivery to the burner.
  • Page 54 12 - FACTORY OPTIONS AND ACCESSORIES Boiler control panel ■ The first section of the condensate drain pipe, which is connected to the condensate outlet from the boiler (Ø 25 mm), must be fl exible pipe to avoid any contact with the discharge pipe.
  • Page 55 12 - FACTORY OPTIONS AND ACCESSORIES Hydraulic circuit ■ Circuit fi lling ■ Circuit emptying The charging system is connected to the boiler’s return line. In case of long unit stops, and forcibly if they happen in the Automatic fi lling valve 1/2”. winter season, the circuit must be emptied.

  • Page 56: Warm Air Heater Module With Gas Burner

    12 - FACTORY OPTIONS AND ACCESSORIES 12.14 - Warm air heater module with gas burner - The PCH heater is a modulating type; the thermal power Natural or propane gas burner with modulating actuator, in accordance with the Gas Directive 2009/142/EC, installed inside output and, therefore, the thermal capacity (fuel consumption) a pre-assembly roofcurb.
  • Page 57 12 - FACTORY OPTIONS AND ACCESSORIES ■ Fuel If the heater is faulty and/or incorrectly operating, switch it off and do not attempt to repair it yourself, but contact our local Before starting up the heater, make sure that: Technical Service. - the gas mains supply data is compatible with the data stated All repairs must be carried out by using genuine spare parts.
  • Page 58 12 - FACTORY OPTIONS AND ACCESSORIES ■ Location The following image shows the location of the connection box “BOX8-QUE”. These roofcurb with integrated burner are designed to be coupled with an 50FF/FC unit (roof-top installation). Make sure they are not fi tted near areas where there is a risk of fi re (fl...
  • Page 59 12 - FACTORY OPTIONS AND ACCESSORIES Connections at the fl ue Important: The fl ue of the gas burner is not supplied with Type C53 the unit. Its design and installation is the responsibility of Sealed combustion circuit (type “C”) connected by means of its the installer and must comply with all the directives and own ducting split in two terminals which could end up in areas with regulations in force in the installation location.
  • Page 60 12 - FACTORY OPTIONS AND ACCESSORIES Gas connection Use the gas line connections only with EC certifi ed components. Important: For a correct maintenance, connect the PCH module by means of a seal and swivel gasket. Avoid using threaded The PCH module is supplied complete with a dual gas valve, gas connected directly on the gas connection.
  • Page 61 12 - FACTORY OPTIONS AND ACCESSORIES Conversion of burner gas type Conversion to LPG Note: The heater with LPG is set up for G31 gas. If the unit runs on G30 instead, it is necessary to verify and possibly The gas burner is supplied already set for natural gas and with adjust settings for CO as shown in the table in paragraph the kit for conversion to LPG, including:...
  • Page 62 12 - FACTORY OPTIONS AND ACCESSORIES Operating cycle of the burner off the burner [E]; the fan continues to purge the combustion ■ Burner operation chamber, post-wash, for a preset length of time [F]. When the unit demands heat, the modulation PCB will start the Opening a contact (see electrical diagram) always causes the operation cycle.
  • Page 63 12 - FACTORY OPTIONS AND ACCESSORIES It is possible to select three operating modes for the burner: ■ Burner protection for low outdoor temperatures (optional) - Operation of the burner as one or two electrical heater stages With outdoor temperatures below (both option not compatible).
  • Page 64 Set Point and I/O menus available. Blocks caused by temperature (safety blocks) Entering the second password grants access to third level. • Excess air temperature This password must be requested directly to CARRIER Activation of safety due to lack of air circulation Manual reset technical service.

  • Page 65: Cooling Recovery Circuit (Ba And Bb Assemblies)

    Copeland 3MAF 32cST, Danfoss POE Oil type 160SZ, ICI Emkarate RL 32CF, Mobil EAL Artic 22CC Access to the recovery circuit Models of 1 circuit (50FC 020 to 047 and 50FF 020 to 093): Access panel to Charging compressors box on circuit 2 valve...

  • Page 66: Zoning Of The Air Fl Ow

    12 - FACTORY OPTIONS AND ACCESSORIES 12.16 - Zoning of the air fl ow Zoning box connections This option allows the management of the air fl ow of the unit to condition up to 4 diff erent zones with a minimum air fl ow of 35% (all The control board of the air zoning is assembled in a separate of them in same operating mode: heating or cooling).

  • Page 67: Commissioning

    13 - COMMISSIONING 13.1 - Checks prior to commissioning Models 50FF/FC 020 to 047: Fan cover lifted (*) ■ It is advisable to make a complete sketch of the installation including the location of the unit and all the components used. This will be very helpful for maintenance and repairs to the installation.

  • Page 68: Possible Problems At Commissioning

    13 - COMMISSIONING Control of the refrigerant charge 13.3 - Operational checks ■ Each unit is shipped with an exact charge of refrigerant for Check the unit operation by verifying the electronic control and proper operation.Refrigerants available are: R-410A or R-454B. the safety devices.

  • Page 69: Maintenance

    14 - MAINTENANCE 14.1 - General recommendations Level 2 maintenance To ensure optimal effi ciency and reliability of the equipment and This level requires specifi c expertise in electrical, cooling and all its functions, we recommend taking out a maintenance contract mechanical systems.

  • Page 70: Access To The Main Components

    14 - MAINTENANCE Level 3 maintenance Warning: when tightening the compressor screws, please consult the maximum torque that can be applied. Maintenance at this level requires specifi c skills, qualifi cations, ■ Solder the suction and discharge piping. tools and expertise. Only the manufacturer, his representative or authorised agent are permitted to carry out this work.
  • Page 71 14 - MAINTENANCE R-454B R-410A Main circuits: Main circuits: 50FC 50FF Charge Volumen (l) comming soon C1: 3,4 C1: 3,4 C1: 3,4 C1: 7,3 C1: 7,6 C1: 9,7 C1: 9,7 C1: 10,0 C1: 10,3 (kg) Environ. 50FC impact 15,2 15,9 20,3 20,3 20,9...
  • Page 72 14 - MAINTENANCE R-454B This detector is installed on a panel next to the supply fans of the indoor circuit. This position ensures the correct reading of the gas Main circuits: concentration in the indoor coil. 50FC Charge comming soon C1: 9,9 C1: 10,2 C1: 10,4 (kg) Environ.
  • Page 73 14 - MAINTENANCE R-410A refrigerant leak detector (optional) Air coil The gas detector sensor is a device that signals leaks in refrigerant. ■ Check that the coil is free from dust and grease. This sensor is installed next to the supply fan. In case of alarm, ■...
  • Page 74 14 - MAINTENANCE Air fi lters Air fi lters in the recovery module ■ Depending on the installation conditions, the fi lter aspect must ■ The inside of the heat recovery unit module is accessed via the be examined to defi ne the cleaning or replacing periodicity. left-hand panel (front view), for maintenance tasks concerning Spare parts should be planned for.
  • Page 75 CARRIER could not accept liability. To keep the machine effi cient and guarantee a long lifetime of the heater, it is advisable to run some inspections every year, before...
  • Page 76 14 - MAINTENANCE 1) Inspection of electrodes 7) Inspection of fl ame monitoring equipment Dismantle the complete pilot fl ame and use a jet of compressed With the heater operating, close the gas tap and verify that the air to clean the mesh and nozzle. Check the integrity of the machine faults, signalled on the LCD display with code F10.

  • Page 77: Control And Analysis Of Breakdowns

    15 - CONTROL AND ANALYSIS OF BREAKDOWNS Symptom Cause Solution Evaporation pressure very a) Charge excess a) Collect refrigerant high in relation with the air b) High air temperature b) Verify overheating inlet c) Compressor suction not air tight c) Verify compressor state and replace d) Cycle reversing valve in middle position d) Check that the valve is not clogged.

  • Page 78: Final Shutdown

    16 - FINAL SHUTDOWN Shutting down Materials to be recovered for recycling Separate the units from their energy sources, allow them to cool ■ Steel then drain them completely. ■ Copper ■ Aluminium Recommendations for disassembly ■ Plastics Use the original lifting equipment. ■...
  • Page 80 CARRIER participates in the ECP programme for RT Check ongoing validity of certifi cate: www.eurovent-certifi cation.com Order No.: 10185, 03.2022. Supersedes order No.: 06.2021 Manufactured for CARRIER in Spain. Manufacturer reserves the right to change any product specifi cations without notice.

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