Table of Contents
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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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Table of Contents
Related Manuals for Carrier 50FC 047
Summarization of Contents
Safety Advisories for Unit Operation
General Safety Advice for Installation and Operation
Provides general safety guidelines for unit installation, operation, and maintenance, emphasizing qualified personnel and PPE.
Refrigerant Handling and Safety Standards
Details safety standards for refrigerants R-410A and R-454B, including handling, leak detection, and decomposition hazards.
Unit Transportation and Handling
Transport Regulations and Procedures
Covers transport regulations for units with R-454B, road, Eurotunnel, maritime, and air transport specifics.
Receipt of Goods Inspection
Instructs on checking unit condition, accessories, and verifying the name plate upon receipt of goods.
Unit Identification Markings
Emphasizes that markings (name plate, labels) must remain visible and not be altered or removed.
Unit Handling Procedures
Discharging Units with a Forklift Truck
Details safe unit unloading and positioning using a forklift truck, including guide rails and dimension tables.
Discharging Units with a Crane
Provides instructions for crane discharge, emphasizing approved slings, rigging points, and careful lifting.
Positioning and Installation Guidelines
Storage Recommendations
Provides recommendations for storing the unit, emphasizing ATEX zones and environmental conditions.
Choosing the Optimal Location
Outlines crucial factors for selecting installation location, including EN 378-3 compliance, altitude, accessibility, and airflow direction.
Indoor Air Distribution Area Requirements
Specifies minimum room surface for indoor air distribution with R-454B, including refrigerant charge and area data.
Acoustic Considerations and Sound Levels
Discusses acoustic considerations, shock absorbers, and provides sound power and pressure level data for various models.
Removing Forklift Guards
Explains how to remove forklift guards, especially for units with lower supply and return or for roofcurb connections.
Ground Preparation for Installation
Emphasizes ensuring a flat installation surface and planning for fixing points and damping devices.
Antivibrator Assembly (Silent-blocks)
Details the process of assembling silent-blocks for vibration isolation, including screw types and dimensions.
Optional Pre-Assembly Roofcurb Installation
Describes the installation of optional pre-assembly roofcurbs, their adjustable features, and components for leveling.
Roof Transport and Handling
Covers transport and lifting to the roof using cranes, rocker arms, and approved slings, checking eyebolts.
Roof Installation Procedures
Explains how to install the roofcurb, including adjusting angle pieces, reinforcing pieces, and checking direction.
Roofcurb Insulation and Waterproof Sealing
Details standard insulation for roofcurbs, including rubber gaskets and thermal insulation for ducts and panels.
Air Duct Connections to Roofcurb
Provides recommendations for connecting air ducts, including nominal flow, pressure, and duct thickness tables.
Positioning the Unit on the Roofcurb
Describes how to mount the machine onto the roofcurb after previous work is completed, fitting perfectly without connecting elements.
Electrical Power Supply Routing
Explains routing power cables to the electrical cabinet or via the unit base, mentioning precuts in the roofcurb.
Changing Airflow Direction On-Site
Details how to convert units from lower airflow to horizontal for supply and return, listing compatible assemblies.
Weight and Support Reactions (50FF Series)
Provides detailed tables of center of gravity, weight, and support reactions for various 50FF assemblies.
Weight and Support Reactions (50FC Series)
Provides detailed tables of center of gravity, weight, and support reactions for various 50FC assemblies.
Weight and Support Reactions (50FC In-line)
Lists center of gravity, weight, and support reactions for 50FC "In-line" assemblies (R1, R2, RP, RW).
Recommended Service Clearances
Details minimum required space for maintenance operations and air circulation for various 50FF/FC assemblies.
Service Clearances for Larger Models
Specifies minimum service clearance for 50FF/FC units (052-093) for different assemblies (B1, B2, BF, B3, BX, BP, BA, BT, BB, BW).
Service Clearances for In-line Models
Provides minimum service clearance for 50FF/FC units (052-093) for R1, R2, RP, and RW assemblies.
Electrical Connection Procedures
Installation Norms for Electrical Connections
Outlines installation norms for electrical connections, including safety precautions, protections, and grounding.
Power Supply Requirements and Verification
Covers power supply verification, voltage constancy, phase imbalance, and protection against overvoltage.
Wire Sizing and Cable Selection
States installer responsibility for wire sizing according to site characteristics and regulations, referencing technical data.
Electrical Cabinet Overview
Describes the wired electrical cabinet, its features like forced ventilation, insulated door, and access.
50FC Electronic Control System
Explains the components of the "50FC" electronic control system, including terminals and remote connection options.
Sensor Locations and Connections
Details the placement and connection of various sensors (temperature, pressure, probes) on the unit for proper operation.
Customer Connection of External Sensors
Guides the customer on connecting external probes (ambient, air quality, humidity) and their wiring.
Fans and Air Ducts Maintenance
Checks for Axial Fans
Outlines pre-commissioning checks for axial fans, including rotation direction, and running checks for operation conditions.
Checks for EC Plug-Fans
Details checks for EC plug-fans, including rotation, running conditions, and the importance of fan-room characteristic curves.
Accessing Outdoor Unit Fans
Explains how to access the outdoor unit for maintenance by lifting the fan cover, including power disconnection and unscrewing.
Checks for Centrifugal Fans (Optional)
Describes checks for optional centrifugal fans, including rotation direction and running conditions.
Pulley and Belt Calibration
Provides instructions for pulley alignment, belt tensioning, and calibration using the deflection test method.
Air Duct Connection Guidelines
Guides on calculating and designing air supply/return ducts, avoiding curves, and considering filters and flexible connections.
Condensate Drain System
Siphon Installation Norms
Details the correct installation of a siphon for the condensate drain to prevent smells and water spills.
Unit Safety Elements and Controls
High Pressure Switch Operation
Explains the function of the high-pressure switch, its activation pressure for R-410A and R-454B, and its automatic reactivation.
Safety Valve Functionality
Mentions the inclusion of a safety valve in the high-pressure line and its tare value.
Low Pressure Safety Management
Notes that low pressure safety is managed by the "50FC" electronic control via the low pressure transducer.
Power Line Protection Devices
Describes protection devices for compressor and fan motors, covering overload, short circuit, and phase failure.
Automatic Control Circuit Switch
Explains the magnetothermal switch protecting the operation circuit against surges and short circuits.
Main Door Switch Mechanism
Details the mechanical device preventing access to the electrical cabinet when the unit is energized.
Defrost Control System
Explains the defrost safety device intended to prevent ice accumulation in the outdoor coil during heating.
Compressor Safety Features
Mentions klixon switch on compressor discharge and compressor lock after power interruption.
Air Flow Control Mechanism
States that supply plug-fans adapt speed to average flow measured by the differential pressure sensor.
Optional Filter Fouling Detection
Describes the differential pressostat for detecting filter fouling level and alarm configuration.
Condensation and Evaporation Pressure Control
Explains how the control manages outdoor fans for condensation/evaporation control in different seasons.
Refrigerant Leak Detection Control
Discusses the control's ability to detect possible refrigerant leaks for environmental protection.
Standard R-454B Refrigerant Leak Detector
Details the standard R-454B leak detector, its technology, installation position, and PROTECTION MODE activation.
Anti-Fire Safety Device
Describes the anti-fire safety device that stops the unit if return air temperature exceeds a set limit.
Optional Smoke Detector System
Explains the optional smoke detector, its function to stop the unit and control dampers in case of smoke.
Optional Anti-Freeze Protection
Covers optional electrical heaters for protecting components and economizer dampers at low temperatures.
Optional R-410A Refrigerant Leak Detector
Describes the optional R-410A leak detector, its function to signal leaks and activate alarms.
Optional Remote Alarm Signaling
Mentions the optional relay for remote alarm signaling, noting compatibility issues with certain options.
Factory Options and Accessories Installation
Dampers Hoods Installation
Explains the installation of fresh air and exhaust air damper hoods, supplied folded down for on-site fitting.
Droplet Eliminator for Fresh Air Intake
Details the installation of a droplet eliminator at the fresh air intake, recommended for high moisture content.
Fresh Air Housing Assembly
Describes the assembly of the fresh air housing kit, supplied disassembled, including parts and their order.
Heat Recovery Wheel Module Installation
Details the transport, handling, and installation of the heat recovery wheel module, including electrical connections.
Accessing the Heat Recovery Module
Explains how to access the heat recovery module interior for filter and condensate pan maintenance via a panel.
Lower Return Enclosure Installation
Describes the installation of an enclosure for lower return on specific models, including parts and screws.
Return Fans Module Installation
Details the transport, handling, and installation of the return fans module, including reinforcement parts and securing the module.
Air Filter Installation and Maintenance
Discusses filter types (gravimetric, opacimetric), frame thickness, combinations, and removal procedures.
Heat Recovery Coil Installation Details
Covers the heat recovery coil option, its function, components, installation, and water circuit details.
Electrical Heaters Installation and Operation
Details the auxiliary electrical heaters, their operating modes, power values, and safety thermistors.
Droplet Eliminator After Indoor Coil
Explains the installation of a droplet eliminator after the indoor coil, its accessibility, and compatibility notes.
Preheater Module Installation
Describes the preheater module for 100% fresh air, its power values, installation, and electrical connection.
Hot Water Coil Installation and Operation
Details the hot water coil option with a three-way valve, its activation cases, configuration types, and water circuit connections.
Gas-Fired Condensing Boiler Installation
Describes the gas-fired boiler option, its characteristics, safety instructions, and compatibility.
Boiler Component Layout and Piping
Illustrates the layout of the boiler components and provides instructions for connecting the piping system.
Boiler Installation Steps
Guides on installing the boiler, connecting piping, and specific steps for assembly and connection.
Gas Connection Requirements
Covers gas connection requirements, checks, pressure values, and gas distribution network considerations.
Condensate Drain Preparation
Details the condensate drain setup, using plastic piping, minimum distances, and avoiding freezing.
Flue Gas Connections and Terminal Configurations
Explains flue gas extraction and intake requirements, pipe types, incline, and terminal configurations.
Boiler Control Panel Operation
Describes the boiler control panel interface, keys, display, and navigation for settings and diagnostics.
Boiler Electrical Connection to Unit
Guides on passing cables from the boiler to the 50FF/FC unit's connection box "BOX8-BOI".
Hydraulic Circuit Management
Covers hydraulic circuit filling, emptying, pressure checks, and water quality requirements for the boiler.
Warm Air Heater Module with Gas Burner
Details the gas burner module, its modulating type, safety features, technical characteristics, and power values.
Gas Burner Fuel Startup Checks
Lists checks for fuel startup, gas mains compatibility, air intake, seals, and gas supply pressure.
Gas Leak Safety Procedures
Provides safety instructions in case of gas smell, emphasizing not operating electrical devices and calling for staff.
Gas Heater Operation Safety Rules
General safety rules for heater operation, prohibiting children, wet contact, and exposure to elements.
Gas Burner Maintenance and Inspections
Stresses compliance with current standards for maintenance and combustion inspections, requiring power disconnection.
Roofcurb Location with Integrated Burner
Advises on locating roofcurbs with integrated burners away from fire or explosion risks and aggressive products.
Roofcurb with Gas Burner Delivery Check
Instructs on checking the condition of the delivered roofcurb with gas burner, matching labels and name plates.
Burner Identification Plate
States that the roofcurb with burner has a name plate with gas characteristics and serial number.
Outlet Temperature Probe Connection
Details connecting the outlet temperature probe to the "BOX8-QUE" connection box for accurate measurement.
Roofcurb Transport and Installation Reference
Refers to section 7.4 for recommendations on handling and fitting the adjustable roofcurb and unit.
Burner Electrical Connection to Unit
Guides on connecting the burner control with the 50FF/FC unit's electrical cabinet via the "BOX8-QUE" box.
Flue Gas Connections and Pressure Drop
Covers flue gas burner installation, pipe types, terminal configurations, and pressure drop calculations.
Flue Terminal Configurations
Explains terminal configurations like Type B23P, C13, C33, C53, and C63 for combustion circuits.
Flue Component Selection Guide
Provides guidance on calculating pressure drops for routing components and selecting appropriate duct diameters.
Burner Condensate Drain Connection
Details the burner condensate drain connection, its sloping structure, and advice on preventing freezing.
Gas Connection Standards
Covers gas line connections using EC certified components, stabilizer, filter, and anti-vibration joint.
Burner Gas Type Conversion Procedures
Details the conversion process for burner gas types (Natural to LPG, G20 to G25 series) and analysis of combustion.
Combustion Analysis and Adjustment
Guides on checking heater operation at maximum power, CO₂ levels, and adjustment procedures.
Burner Operating Cycle Description
Explains the burner operation cycle, ignition phase, pilot and main burner functions, and modulation control.
Burner Shutdown Procedures
Describes how the modulation PCB turns off the burner based on voltage signals and the effect of opening contacts.
Burner Safety Thermostat Functionality
Mentions safety thermostats with automatic reset and positive safety setting, and the F20 block signal.
Burner Fault Codes (Fxx)
States that the PCB distinguishes 30 fault types and lists codes, causes, and remedies in a table.
Air/Gas Premixing Operation Details
Details the burner's air/gas premixing, vacuum generation, and adjustments for CO₂ levels.
Gas Burner Control Interface
Explains client connections to the unit's control for burner operation via proportional output and ON/OFF signal.
Optional Burner Low Temperature Protection
Covers optional protection kits for low outdoor temperatures, including an electrical heater and NTC probe.
Burner Interface Panel Operation
Describes the burner's interface panel with LCD display and function keys for control, configuration, and diagnostics.
Burner Fault Analysis and Block Codes
Lists burner faults (F10-F75, F00), their causes, and remedies, distinguishing between preventive and operational blocks.
Commissioning Procedures
Pre-Commissioning Checks
Emphasizes verifying power supply, electrical installation, sensor connections, and pre-heating the crankcase heater.
Compressor Replacement Procedure
Details procedures for compressor replacement, including disconnection, soldering, vacuum, and reloading refrigerant.
Potential Commissioning Problems
Lists potential commissioning problems like air flow lack, recirculation, noise, water overflow, and humidity issues.
Operational Checks and Data Recording
Guides on checking unit operation, control, safety devices, and recording parameters for performance analysis.
Unit Maintenance Procedures
General Maintenance Recommendations
Recommends maintenance contracts, professional servicing, and routine checks for optimal efficiency and environmental protection.
Servicing Levels and Tasks
Outlines Level 1 maintenance (user checks) and Level 2 maintenance (expert checks) for electrical, cooling, and mechanical systems.
Level 3 Maintenance Requirements
Details Level 3 maintenance requiring specialized skills for component replacement and refrigerant circuit operations.
Accessing Main Unit Components
Provides instructions for accessing main components like the compressor, emphasizing de-energization and R-454B detector availability.
Lubrication Oil Handling and Replacement
Covers oil handling precautions, storage, quality checks, and replacement procedures, including recommended oil types.
Refrigerant Types and Safety Information
Lists refrigerants (R-410A, R-454B), their safety groups, and notes on A2L refrigerant detectors.
Periodic Refrigerant Leak Tightness Checks
Explains periodic leak testing frequency based on refrigerant charge and GWP, and the CO₂ equivalency calculation.
Optional Active Dehumidification Cooling
Describes the active dehumidification option, its function of reheating air, and its integration with the cooling circuit.
Standard R-454B Refrigerant Leak Detector
Details the standard R-454B leak detector's function, mitigation parameters, PROTECTION MODE, and BMS integration.
Optional R-410A Refrigerant Leak Detector
Describes the optional R-410A leak detector, its function to signal leaks, reset procedure, and annual testing.
Optional Cooling Recovery Circuit Maintenance
Explains the optional cooling recovery circuit, its components, and maintenance recommendations.
Air Coil Cleaning Procedures
Provides instructions for cleaning the air coil, including methods for dust and grease removal and safety precautions.
Optional Outdoor Coil Protection Grid
Mentions the optional protection grid for the outdoor coil and its removal for cleaning.
Condensate Drain Pan Cleaning
Details the condensate drain pan, its removability for cleaning, and checking for clogs.
Air Filter Inspection and Replacement
Discusses filter examination, cleaning/replacing periodicity, pressure drop data, and filter removal procedures.
Recovery Module Air Filter Access
Explains access to filters in the heat recovery module and the procedure for cleaning them.
Electrical Cabinet Air Filter Maintenance
Advises periodic inspection of filters in electrical cabinet grids for ventilation maintenance.
Optional Mixing Box Damper Servomotor Check
Suggests checking the condition of servomotors for motorized dampers in mixing box assemblies.
Optional Centrifugal Fan Checks
Recommends checking turbine and motor cleanliness, and having spare belts for fans.
Gas Burner Maintenance and Safety Checks
Outlines maintenance tasks for the gas burner, emphasizing qualified staff, safety precautions, and annual inspections.
Electrode Inspection and Cleaning
Details the inspection and cleaning of pilot flame electrodes, including ceramic integrity and correct positioning.
Flue Exhaust and Air Intake Duct Inspection
Advises visual inspection of flue exhaust and air intake ducts for their status and dust removal.
Venturi Inspection and Cleaning
Describes cleaning the venturi mouth and ensuring no dirt falls inside.
Exchanger and Burner Cleaning
Explains that exchanger and burner cleaning is usually not required but details procedures if needed.
Water Trap Inspection and Cleaning
Guides on cleaning the water trap annually, checking connections, and looking for metallic residue.
Intake Gas Pressure Verification
Details verifying intake gas pressure at the valve against required values at maximum heat output.
Flame Monitoring Equipment Inspection
Describes checking the machine faults with code F10 and resetting the fault after verifying gas tap closure.
Safety Thermostat Inspection
Explains how to test safety thermostats by removing fast-ons and checking for F20 block signals.
Ionization Current Inspection
Guides on checking ionization current via the I/O menu, its values, and implications of low readings.
Breakdown Control and Analysis
High Evaporation Pressure Issues
Lists causes (charge excess, high air temp, etc.) and solutions for high evaporation pressure.
Low Condensation Pressure Issues
Lists causes (gas lack, compressor issues, etc.) and solutions for very low condensation pressure.
High Condensation Pressure Issues
Lists causes (low air flow, dirty condenser, etc.) and solutions for high condensation pressure.
Low Evaporation Pressure Issues
Lists causes (low evaporator flow, frozen evaporator, etc.) and solutions for low evaporation pressure.
Compressor Not Starting or Humming
Lists causes (no power, open contacts, etc.) and solutions for compressor failure to start or make noise.
Compressor Intermittent Operation
Lists causes (low power supply, disconnected cable) and solutions for intermittent compressor motor sound.
Repeated Compressor Starts and Stops
Lists causes (high pressure, short cycle, dirty evaporator) and solutions for repeated compressor cycling.
Noisy Compressor Operation
Lists causes (loose attachment, oil lack) and solutions for noisy compressor operation.
Noisy Unit Operation
Lists causes (no antivibration protection) and solutions for noisy operation.
Incorrect Cycle Reversing
Lists causes (electrical fault, defective valve) and solutions for incorrect cycle reversing.
Defrost System Malfunction
Lists causes (defrost method not working, control fault) and solutions for lack of defrosting.
Failure to Switch Winter/Summer Cycles
Lists causes (cycle reversing valve in middle) and solutions for incorrect cycle switching.
Humidity Probe Reading Errors
Lists causes (dirt in sensor) and solutions for humidity probe errors.
Final Unit Shutdown and Disposal
Unit Shutting Down Procedure
Instructs to separate units from energy sources, allow cooling, and drain them completely before disassembly.
Disassembly and Recycling Recommendations
Provides guidelines for disassembly, using original lifting equipment and sorting components for recycling.
Fluids Recovery for Treatment
Lists fluids to be recovered for treatment, including refrigerant, energy transfer fluid, and compressor oil.
Materials for Recycling
Lists materials to be recovered for recycling, such as steel, copper, aluminium, plastics, and foam.
Waste Electrical and Electronic Equipment (WEEE)
States that end-of-life equipment must be disassembled and processed according to WEEE directives.
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