50HJ Single-Package Rooftop Units Electric Cooling with Electric Heat Option

13 to 20 Nominal Tons

High-performance, single-package rooftop products with the following industry-leading premium features:

 Cooling EERs up to 10.5

 Serviceable semi-hermetic compressors

 Service valves and full refrigeration system safeties

 High-static oversized fan motors (standard)

 Variable-pitch belt drive fan motors (standard)

 TEMP system compatible Apollo electronic controls (optional)

Features/Benefits Industry-leading cooling EERs The 50HJ015 (13 tons) and 017 (15 tons) units provide leading ARI (Air Conditioning and Refrigeration Institute) certified cooling EERs (Energy Efficiency Ratios) of 10.5 and 10.3, respectively. The fully-rated 20-ton 50HJ025 has an EER of 9.3. These exceptionally high ratings assure mini-mum operating costs and will qualify for attractive utility rebates in many areas.

Semi-hermetic compressors: All these 50HJ units use the Carlyle 06D semi-hermetic compressors. These serviceable compressors are highly regarded, preferred by owners and users, and are offered exclusively on the Carrier high-efficiency 13 to 20 ton HJ units.

High static oversized fan motors and variable-pitch belt drives: The 50HJ units have oversized evaporator-fan motors and variable-pitch belt drives supplied standard from the factory to provide up to 2 in. wg of external static pressure at 400 cfm per ton with wet coils and clean filters installed.

Easy installation: The 50HJ 13 to 20 ton rooftop units are perfect for vertical supply and return roof curb mount applications on new construction, retrofit, and replacement applications. The compact physical size and weight are not only advantages in terms of minimizing required roof structures on new construction and retrofit jobs, but also make the 50HJ the perfect replacement unit for any of the original Carrier 50DP,DR 012- 020 units installed in the late 1970s and early 1980s to meet the upgraded job requirements of the 1990s. The new 50HJ units can be easily converted to horizontal supply and return with Carrier's new fan-performance- boosting, horizontal, high-static regain.

Efficient operation, dependable performance: Built with energy efficiency in mind, the 50HJ cooling coils feature staggered copper tubes and mechanically bonded aluminum fins to provide top efficiency. A manual outdoor-air damper can be preset to admit up to 25% outdoor air for year-round ventilation. Units equipped with economizer have a thermostatically controlled, fully modulating damper which admits up to 100% outdoor air and provides low-cost cooling. Temperature control governs economizer cooling change-over to provide lowest cost operation in mild weather. Condenser fans are direct driven, factory-lubricated, and positioned for quiet, efficient vertical discharge. High technology design techniques feature computer-programmed balance between compressor, condenser, and evaporator. Carrier specified semi-hermetic compressors are equipped with crankcase heaters, calibrated circuit breakers for overcurrent protection, and Cycle-LOC™ compressor protection. Electric heat and an integrated economizer are accessories/options on all units. The weather resistant cabinet is designed for durability under all climatic conditions. The unit cabinet is made of Carrier Weather Armor® galvanized steel, prepainted for long life and good looks.