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WeatherMaker® 50TCQ

WeatherMaker® 50TCQ
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WeatherMaker® 50TCQ

Product catalog summary
Overview: The Carrier WeatherMaker® Single Packaged Rooftop Heat Pump Units are designed for easy installation, maintenance, and use, with capacities ranging from 6 to 12.5 nominal tons. They feature enhancements for functionality and efficiency.
Key Features:
  • Convertible to horizontal airflow, compatible with Carrier curbs since 1989.
  • Easy access panels and no-strip screw system for maintenance.
  • Central terminal board for simplified connections and troubleshooting.
  • Standard features include high and low-pressure switches, filter drier, and 2-inch filters.
  • Energy Efficiency Ratios (EER) up to 11.2 and Integrated Energy Efficiency Ratios (IEER) up to 12.7.
  • Scroll compressors and crankcase heaters for reliability.
  • Field convertible airflow configurations and various electrical routing options.
  • Dependable defrost logic and single-point electrical connection.
  • Standardized components and controls for easier service and stocking.
Specifications:
  • Cooling capacities range from 69,000 to 142,000 BTUH.
  • Heating capacities range from 31,500 to 142,000 BTUH with Coefficient of Performance (COP) up to 3.50.
  • Sound performance ratings provided in decibels across various frequencies.
  • Physical data includes refrigeration systems, evaporator and condenser coils, fan and motor specifications, and filter sizes.
Options and Accessories:
  • Factory-installed options include various sensor, fan, coil, and electrical configurations.
  • Field-installed accessories available for further customization.
Performance and Efficiency:
  • Units meet DOE-2018, ASHRAE 90.1-2016, and IECC-2015 efficiency requirements with the SAV™ option.
  • AHRI ratings for cooling and heating modes ensure compliance with industry standards.
Specifications and Accessories: The document outlines specifications and accessories for HVAC units, including electrical connections, coil options, and condenser protection with louvered hail guards.
Controls: Details on thermostats, temperature sensors, PremierLink™ DDC communicating controller, RTU Open multi-protocol controller, smoke detectors, and horn/strobe annunciators.
Economizers and Outdoor Air Dampers: Economizers available for electro-mechanical and DDC controls, complying with California Title 24 FDD standards, include barometric relief and CO2 sensors for demand-controlled ventilation.
Electric Heat and Indoor Motor: Electric resistance heaters and multiple motor and belt drive packages available. SAV™ fan speed system with VFD controller required in the U.S.
Power Options: Convenience outlets, both powered and unpowered, reduce service and installation costs. Non-fused disconnects available for safety compliance.
Roof Curbs and Additional Options: Roof curbs available in 14-inch and 24-inch sizes. Other options include economizers, CO2 sensors, smoke detectors, and hail guards.
Economizer Functionality: Economizers reduce operating costs by bringing in fresh air for ventilation and cooling, equipped with sensors to optimize performance.
CO2 Sensors: Adjust economizer to intake correct amount of outside air based on occupancy, reducing load on the rooftop unit.
Smoke Detectors: Factory-installed smoke detectors enhance safety by shutting down the rooftop unit when smoke is detected.
Convenience Outlets: Available in powered and unpowered versions, providing flexibility and compliance with code requirements.
PremierLink™ and RTU Open Controllers: Regulate rooftop performance and facilitate integration with building automation systems.
Time Guard II Control Circuit: Prevents compressor short-cycling, not required with certain controllers.
Staged Air Volume (SAV) System: Uses a Variable Frequency Drive (VFD) to adjust fan speed, saving energy and complying with ASHRAE and IECC standards.
Motormaster® Head Pressure Controller: Maintains condenser head pressure during low ambient cooling operations, allowing operation down to -20°F (-29°C).
Specifications and Electrical Data: Detailed electrical specifications for various units, including Full Load Amperes (FLA), Locked Rotor Amperes (LRA), Minimum Circuit Amperes (MCA), and fuse or HACR breaker sizes.
Cooling and Heating Procedures: Operational procedures for cooling and heating units without economizers, including energizing specific terminals and contactors.
Economizer Operations: EconoMi$er IV system modulates outdoor air dampers to maintain a mixed air temperature, integrating with CO2 sensors for demand-controlled ventilation.
Wiring Diagrams: Typical wiring diagrams for various unit configurations, essential for installation and troubleshooting.
Standards and Compliance: Compliance with ASHRAE 90.1-2016 and IECC-2015 standards ensures energy efficiency requirements are met.
Critical Information: Importance of adhering to specified electrical parameters to prevent equipment damage and ensure safety.
Overview: Detailed technical specifications and operational procedures for the EconoMi$er IV and EconoMi$er2 systems integrated with PremierLink™ controllers in HVAC units.
Specifications:
  • EconoMi$er IV operates with a single compressor, adjusting damper position based on needs.
  • PremierLink™ controller manages compressor operations and economizer functions.
  • Minimum and maximum operating ambient temperatures for cooling are 25°F (-4°C) and 115°F (46°C).
  • Airflow must be maintained within specified limits.
Procedures:
  • Heating Mode: System energizes specific contactors and adjusts economizer damper based on thermostat calls.
  • Cooling Mode: PremierLink controller determines availability of free cooling.
  • Defrost Cycle: Initiated when outdoor coil temperature drops below 28°F (-2°C).
  • Automatic Changeover: System switches between heating and cooling based on space temperature.
Control Strategies:
  • Demand ventilation adjusts damper positions based on CO2 levels.
  • PID control processes for precise temperature regulation.
Recommendations:
  • Economizers recommended for most applications to reduce operating expenses.
  • Correct sizing of air conditioners is crucial to avoid issues like short cycling.
Standards and Compliance:
  • Insulation and adhesives meet NFPA 90A requirements.
  • Controllers are ASHRAE 62 compliant.
Specifications:
Communication board supports up to 62 network variables, compatible with all open controllers, with built-in surge protection and battery backup.
Electric and Electronic Control System for HVAC:
Includes low voltage control circuit, central control terminal board, and integrated defrost system.
Safety Features:
Compressor overtemperature and overcurrent protection, loss of charge switch, and high-pressure switch.
Sequence of Operations for HVAC Controls:
Details on sequence of operations for decentralized rooftop units.
Panel Air Filters:
Factory-installed, low velocity, throwaway fiberglass filters.
Self-Contained Air Conditioners:
Outdoor, rooftop-mounted units with hermetic scroll compressors and heat pumps, using Puron® refrigerant.
Delivery, Storage, and Handling:
Units must be stored upright and handled per manufacturer recommendations.
Operating Characteristics:
Units operate in a wide temperature range and support various supply and return configurations.
Electrical Requirements:
Main power supply must match manufacturer specifications.
Unit Cabinet:
Constructed of galvanized steel with a baked enamel finish, featuring insulated compartments.
Coils:
Standard and optional coil types available, with various coatings for corrosion resistance.
Refrigerant Components:
Features include a fixed orifice metering system and refrigerant filter drier.
Securing Ductwork: Ensure ductwork is secured to the curb before mounting the unit.
High Static Indoor Fan Motor(s) and Drive(s): Factory-installed motors and drives provide an extended performance range.
Thru-the-Bottom Utility Connectors: Kit allows electrical connections through the basepan.
Outdoor Air Enthalpy Sensor: Provides single enthalpy control and, with a return air sensor, differential control for free cooling.
Return Air Enthalpy Sensor: Works with the outdoor sensor for differential enthalpy control.
Indoor Air Quality (CO2) Sensor: Offers demand ventilation control, available in various mounts with adjustable setpoints.
Smoke Detectors: Factory-installed, four-wire controllers with differential sensing.
Horn/Strobe Annunciator: Provides audible/visual signals, requiring a field-supplied transformer.
Winter Start Kit: Bypasses the low-pressure switch for cooling down to 25°F.
Time Guard: Prevents compressor short cycling with a 5-minute delay.
Electric Heat: Features open coil resistance wire heaters with integral fusing.
Hinged Access Panels: Easy access through quarter-turn latches on major panels.
Display Kit for Variable Frequency Drive: Provides access to VFD controller programs.
Condensate Overflow Switch: Monitors condensate levels, shutting down compressors during overflow.
Manual Damper: Includes damper, air inlet screen, and rain hood for ventilation.
Supply Duct Cover (14 size only): Required for converting vertical to horizontal duct supply.
Disconnect Switch Bracket (14 size only): Provides a mounting bracket for disconnects over 100 amps.
Note: Specifications and designs are subject to change without notice.
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Catalog excerpts

WeatherMaker® 50TCQ-1

Product Data WeatherMaker® Single Packaged Rooftop Heat Pump Units 6 to 12.5 Nominal Tons 50TCQ*07, 08, 12, 14 Electric Cooling Rooftop Units with Heat Pump and Optional Electric Heat with Puron® (R-410A) Refrigerant © 2019 Carrier Corporation Form 50TCQ-7-14-02PD

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WeatherMaker® 50TCQ-2

Features/Benefits The Carrier Packaged Heat Pump rooftop unit (RTU) was designed by customers for customers. With no-strip screw collars, handled access panels, and more, we’ve made your unit easy to install, easy to maintain and easy to use. Easy to install All WeatherMaker® units are field-convertible to horizontal air flow which makes it easy to adjust to unexpected job site complications. Lighter units make easy replacement. Carrier 6 to 12.5 ton 50TCQ rooftops fit on existing Carrier curbs dating back to 1989. Also, our large control box gives you room to work and room to mount Carrier accessory...

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WeatherMaker® 50TCQ-3

Model number nomenclature Staged Air Volume (SAV™) fan speed system utilizes a Variable Frequency Drive (VFD) to automatically adjust the indoor fan motor speed between cooling stages. Available on single stage cooling model 07 and 2-stage cooling models, 08-14 with electro-mechanical controls or RTU Open controller. Note that SAV is required on all units for installation in the United States as per the Department of Energy (DOE) efficiency standard of 2018. Series - WeatherMaker® 50TC - Packaged Rooftop Refrig. Systems Options A = One Stage Cooling Models D = Two Stage Cooling Models Electrical...

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WeatherMaker® 50TCQ-4

AHRI RATINGS - COOLING MODE 50TCQ LEGEND AHRI ASHRAE COP EER IECC IEER Air-Conditioning, Heating and Refrigeration Institute American Society of Heating, Refrigerating and AirConditioning Engineers Coefficient of Performance Energy Efficiency Ratio International Energy Conservation Code Integrated Energy Efficiency Ratio 1. Rated and certified under AHRI Standard 210/240 or 340/360, as appropriate. 2. Ratings are based on: Cooling Standard: 80°F (27°C) db, 67°F (19°C) wb indoor air temp and 95°F db outdoor air temp. IEER Standard: A measure that expresses cooling part-load EER efficiency for...

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WeatherMaker® 50TCQ-5

MINIMUM - MAXIMUM AIRFLOWS (CFM) COOLING AND ELECTRIC HEAT 50TCQ UNIT ‘Minimum electric heat CFM exceptions (see table below): LEGEND dB — Decibel NOTES: 1. Outdoor sound data is measured in accordance with AHRI standard 270. 2. Measurements are expressed in terms of sound power. Do not compare these values to sound pressure values because sound pressure accounts for specific environmental factors which do not match individual applications. Sound power values are independent of the environment and therefore more accurate. A-weighted sound ratings filter out very high and very low frequencies,...

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WeatherMaker® 50TCQ-8

Options and accessoriesFACTORY-INSTALLED OPTIONS AND FIELD-INSTALLED ACCESSORIES CATEGORY 2. Requires a field-supplied 24V transformer for each application. See price pages for details. 3. FDD (Fault Detection and Diagnostic) capability per California Title 24 section 120.2. 4. Models with RTU Open DDC controls comply with California Title 24 Fault Detection and Diagnostic (FDD). PremierLink is not FDD. 5. Included with economizer. 6. Sensors for optimizing economizer performance. 7. SAV is required on all units for installation in the United States as per the Department of Energy (DOE) efficiency...

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WeatherMaker® 50TCQ-9

Power Exhaust Pressure Relief Economizers can reduce operating costs. They bring in fresh, outside air for ventilation; and provide cool, outside air to cool your building. This is the preferred method of low ambient cooling. When coupled to CO2 sensors, economizers can limit the ventilation air to only that amount required. Economizers are available, installed and tested by the factory, with either enthalpy or dry bulb temperature inputs. There are also models for electro-mechanical as well as direct digital controllers. Additional sensors are available as accessories to optimize the economizers....

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WeatherMaker® 50TCQ-10

IMPORTANT: Data based on 0.10 ($/kWh) in an office application utilizing Carrier’s HAP 4.6 simulation software program. Compared to single speed indoor fan motor systems, Carrier’s SAV system can save substantial energy, 25%+, versus single speed indoor fan motor systems. The VFD used in Carrier’s SAV system has soft start capabilities to slowly ramp up the speeds, thus eliminating any high inrush air volume during initial start-up. It also has internal over current protection for the fan motor and a field-installed display kit that allows adjustment and in depth diagnostics of the VFD. This...

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WeatherMaker® 50TCQ-11

NOTE: Where multiple variations are available, the heaviest combination is listed.

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WeatherMaker® 50TCQ-12

DIMENSIONS OF 50TCQ*07 UNITS BUILT ON AND AFTER 4/15/2019 Base unit dimensions

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WeatherMaker® 50TCQ-14

50TCQ*07 CORNER WEIGHTS AND CLEARANCES Base unit dimensions (cont)

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WeatherMaker® 50TCQ-15

50TCQ*07 BASE RAIL DETAILS

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WeatherMaker® 50TCQ-16

Base unit dimensions (cont)

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WeatherMaker® 50TCQ-18

50TCQ*08-09 UNIT DIMENSIONS (cont) Base unit dimensions (cont)

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WeatherMaker® 50TCQ-19

CONDITION Unit disconnect is mounted on panel No disconnect, convenience outlet option Recommended service clearance Minimum clearance Surface behind servicer is grounded (e.g., metal, masonry wall) Surface behind servicer is electrically non-conductive (e.g., wood, fiberglass) Check for sources of flue products within 10 ft (3 m) of unit fresh air intake hood Side condensate drain is used Minimum clearance Surface behind servicer is grounded (e.g., metal, masonry wall, another unit) Surface behind servicer is electrically non-conductive (e.g., wood, fiberglass) NOTE: Unit not designed to have...

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WeatherMaker® 50TCQ-20

Base unit dimensions (cont)

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WeatherMaker® 50TCQ-21

50TCQ*12 UNIT DIMENSIONS (cont)

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WeatherMaker® 50TCQ-22

Base unit dimensions (cont) 50TCQ*12 SERVICE CLEARANCES CONDITION Unit disconnect is mounted on panel No disconnect, convenience outlet option Recommended service clearance Minimum clearance Surface behind servicer is grounded (e.g., metal, masonry wall) Surface behind servicer is electrically non-conductive (e.g., wood, fiberglass) Check for sources of flue products within 10 ft (3 m) of unit fresh air intake hood Side condensate drain is used Minimum clearance Surface behind servicer is grounded (e.g., metal, masonry wall, another unit) Surface behind servicer is electrically non-conductive...

 Open the catalog to page 22

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.