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 093
Summarization of Contents
Safety Advisories and Standards
General Safety Advice
General safety rules and precautions to prevent accidents during installation, operation, and maintenance.
Refrigerant Safety Standards
Specific safety standards and regulations for refrigerants R-410A and R-454B, including handling and leak detection.
Transport, Handling, and Lifting Procedures
Unit Transport Guidelines
General procedures for safe transport of the unit, including road and maritime regulations.
Receipt of Goods Inspection
Steps for checking unit condition and verifying contents upon delivery.
Unit Identification Markings
Information on unit markings, punch marks, and labels that must remain visible.
Safe Unit Handling Procedures
Instructions for safely handling and positioning the unit using appropriate tools.
Discharge via Forklift Truck
Detailed procedure for unloading the unit using a forklift, including guide rails.
Discharge via Crane
Instructions for safely unloading the unit using a crane, with emphasis on slings and rigging points.
Unit Positioning and Installation Guidelines
Operation Limits
Specifies the operating limits for cooling and heating modes based on air conditions.
Unit Storage Recommendations
Recommendations for storing the unit before installation to maintain its condition.
Choosing the Installation Location
Criteria and precautions for selecting the optimal installation site, considering regulations and environment.
Ground Preparation for Installation
Ensuring a flat and stable surface for unit installation to prevent structural stress.
Antivibrator (Silent-block) Assembly
Procedure for installing anti-vibration mounts (silent-blocks) for noise and vibration reduction.
Pre-Assembly Roofcurb Installation
Details on installing an optional pre-assembly roofcurb for unit placement on roofs.
Roofcurb Installation on Joists
Steps for correctly positioning and securing the roofcurb onto roof joists.
Roofcurb Insulation and Waterproof Sealing
Recommendations for insulating and sealing roofcurbs to prevent water ingress.
Air Duct Connections to Roofcurb
Connecting air supply and return ducts to the roofcurb profiles.
Positioning the Unit on the Roofcurb
Steps for placing the unit onto the installed roofcurb, ensuring proper alignment.
Electrical Power Supply Routing
Routing power cables to the unit's electrical cabinet via panels and precuts.
Changing Airflow Direction On-Site
Procedure for converting airflow direction on-site for specific unit assemblies.
Centre of Gravity, Weight, and Support Reactions
Detailed weight and support reaction data for various 50FF/FC unit assemblies.
Recommended Service Clearance
Minimum spaces required around the unit for maintenance operations and access.
Electrical Connection Procedures
Installation Norms for Electrical Connections
General norms and safety rules for electrical installations, including protections.
Power Supply Verification and Connection
Guidelines for verifying and connecting the power supply, including voltage and imbalance checks.
Electrical Wire Sizing
Procedure for selecting and sizing electrical wires based on regulations and unit data.
Electrical Cabinet Description
Description and access to the unit's fully wired electrical cabinet with forced ventilation.
50FC Electronic Control System
Overview of the '50FC' electronic control system, its components, and connectivity.
Location and Connection of Machine Sensors
Diagrams showing sensor locations and instructions for customer sensor connections.
Fan and Air Duct Checks and Maintenance
Axial Fan Checks
Procedures for checking axial fans before and during operation, including rotation and speed.
EC Plug-Fan Checks
Procedures for checking EC plug-fans, including rotation and characteristic curves.
Centrifugal Fan Checks (Optional)
Procedures for checking optional centrifugal fans, including rotation and characteristic curves.
Pulley and Belt Calibration
Steps for calibrating pulleys and setting belt tension for centrifugal fans.
Air Duct Connection Recommendations
Recommendations for designing and connecting air supply and return ducts for optimal performance.
Condensate Drain System
Siphon Installation Norms
Guidelines for correctly installing a siphon to prevent bad smells and water spills.
Unit Safety Elements and Controls
High Pressure and Safety Valve Operation
Function and activation pressure of the high-pressure switch and safety valve.
Low Pressure Safety and Power Line Protection
How low-pressure safety operates and protection for compressor/fan power lines.
Automatic Control Circuit Switches
Magnetothermal switch for operation circuit protection and main door switch.
Defrost Control and Compressor Safeties
Function of defrost control and safeties for compressors (klixon, lockout).
Air Flow Control and Filter Fouling Detection
How airflow is controlled and the optional filter fouling detection system.
Condensation/Evaporation Pressure Control
Managing outdoor fans for condensation/evaporation control in different seasons.
Refrigerant Leak Control System
System for detecting refrigerant leaks and enabling protection mode for safety.
R-454B Refrigerant Leak Detector (Standard)
Details of the standard refrigerant leak detector for R-454B, its installation and function.
Anti-Fire and Smoke Detector Safety Features
Anti-fire safety device and optional smoke detector for fire safety compliance.
Optional Anti-Freeze Protection
Optional protection against low outdoor temperatures for various components.
R-410A Refrigerant Leak Detector (Optional)
Details of the optional refrigerant leak detector for R-410A, its function and reset.
Optional Remote Alarm Signaling
Optional relay for remote alarm signalling integrated with the '50FC' control.
Factory Options and Accessories Installation
Dampers Hoods Installation
Installation of fresh air and exhaust air damper hoods supplied folded down.
Droplet Eliminator at Fresh Air Intake
Installation of a droplet eliminator for high moisture content air in the fresh air intake.
Fresh Air Housing Installation
Installation of the optional fresh air housing for specific unit assemblies.
Heat Recovery Wheel Module Installation
Transport, handling, and installation of the heat recovery wheel module for BW and RW assemblies.
Lower Return Enclosure Installation
Installation of an enclosure for the lower air return on specific models.
Return Fans Module Installation
Transport, handling, and installation of the return fans module for RP assembly.
Air Filter Replacement and Maintenance
Description and procedures for replacing and cleaning air filters.
Heat Recovery Coil Installation and Operation
Installation and operation details of the heat recovery coil option.
Electrical Heaters Installation
Details and installation procedures for auxiliary electrical heaters.
Droplet Eliminator After Indoor Coil
Installation of a droplet eliminator after the indoor coil for high airflow or moisture.
Preheater Module Installation
Installation and electrical connection of the preheater module for fresh air intake.
Hot Water Coil Installation
Installation and operation details of the hot water coil option with 3-way valve.
Gas-Fired Condensing Boiler Installation
Installation and safety instructions for the gas-fired condensing boiler option.
Boiler Installation and Hydraulic Connections
Steps for installing the boiler and connecting its hydraulic circuits to the unit.
Gas Connections for Burner Module
Guidelines for connecting the gas supply to the burner module, including pressure and safety.
Condensate Drain Preparation
Instructions for preparing and connecting the condensate drain for the boiler.
Flue Gas Connections and Terminals
Requirements for flue gas connections, including pipe types and terminal configurations.
Warm Air Heater Module with Gas Burner
Details on the warm air heater module with gas burner, its characteristics and safety.
Burner Operation Cycle and Controls
Description of the burner's operation cycle, including ignition, modulation, and shutdown.
Burner Gas Type Conversion
Procedure for converting the burner gas type (e.g., Natural Gas to LPG).
Cooling Recovery Circuit Characteristics
Description of the cooling recovery circuit and its components and characteristics.
Air Flow Zoning Management
Management of airflow for multiple zones using the zoning option.
Zone Terminal and Control Board Connections
Wiring the zone terminals and connecting the air zoning control board to the unit.
Commissioning Procedures and Checks
Pre-Commissioning Checks
Essential checks before starting the commissioning process, including power and sensor connections.
Possible Commissioning Problems
Common issues that may arise during commissioning, such as airflow lack or recirculation.
Operational Checks and Parameter Recording
Verifying unit operation, checking safety devices, and recording operational parameters.
Unit Maintenance Procedures
General Maintenance Recommendations
General advice for ensuring optimal efficiency and reliability through maintenance.
Servicing Levels and Tasks
Details on different maintenance levels (1, 2, 3) and recommended tasks for each.
Accessing Main Unit Components
Procedures for accessing major unit components like the compressor for maintenance.
Refrigerant Charge and Oil Management
Procedures for managing refrigerant and oil during maintenance, including quantities and types.
R-410A Refrigerant Leak Detector Maintenance
Maintenance for the optional R-410A refrigerant leak detector, including testing and replacement.
Active Recovery Circuit Maintenance
Maintenance recommendations for the components of the optional active recovery circuit.
Air Coil Cleaning Procedure
Procedure for cleaning the air coil to remove dust and grease.
Optional Outdoor Coil Protection Grid Maintenance
Maintenance for the optional outdoor coil protection grid, including removal for cleaning.
Condensate Drain Pan Cleaning
Cleaning and maintenance of the condensate drain pan to ensure it is clean and the drain is not clogged.
In-line Unit Supply Fan Access
Accessing and maintaining the supply fan in in-line units by removing the next panel.
Air Filter Inspection and Replacement
Filter inspection, cleaning, and replacement procedures based on installation conditions.
Recovery Module Air Filter Maintenance
Maintenance for air filters in the heat recovery module, including access and cleaning procedures.
Electrical Cabinet Grid Filter Checks
Checking and cleaning filters in the electrical cabinet grids to ensure proper ventilation.
Optional Mixing Box Servomotor Checks
Checking the condition of the servomotors for optional mixing box assemblies.
Optional Centrifugal Fan Maintenance
Maintenance for optional centrifugal fans, including turbine, motor, and belt checks.
Gas Burner Maintenance and Inspection
Maintenance tasks and safety precautions for the gas burner, including inspections before the season.
Final Unit Shutdown and Decommissioning
Unit Shutting Down Procedure
Steps for safely shutting down the unit by separating it from energy sources.
Disassembly and Recycling Recommendations
Guidelines for disassembling the unit and sorting components for recycling.
Fluid Recovery and Treatment
Information on recovering and treating fluids such as refrigerant and oil.
Waste Electrical and Electronic Equipment (WEEE)
Guidelines for the disposal of electrical and electronic equipment according to WEEE regulations.
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