The Tranquility 18 (SC) Compact Series raises the bar for water-source heat pump efficiencies, features, and application flexibility. Not only does the Tranquility SC exceed ASHRAE 90.1 efficiency standards, but it also uses R-454B low Global Warming Potential (GWP) refrigerant, making it an extremely environmentally friendly space conditioning product solution. Tranquility SC is eligible for LEED® (Leadership in Energy and Environmental Design) points due to its innovative and environmentally-conscious design. With one of the smallest cabinets in the industry, the Tranquility SC easily fits into tight spaces. Designed to be backward compatible with thousands of older water-source heat pumps, the Tranquility 18 (SC) Compact Series heat pump is packed full of the innovation you have come to expect from the experts at ClimateMaster.

Recent EPA mandates require an industry transition to low-GWP refrigerants, such as R-454B which is a gas that is classified as having low-toxicity, low-flammability rating. Due to these characteristics, R-454B systems charged with over 62 ounces of refrigerant must contain an integrated Refrigerant Detection System (RDS). In the unlikely event of a system-refrigerant leak, the RDS shuts down compressor operation and runs the unit blower motor to disperse any concentration of leaked refrigerant in compliance with UL 60335-2-40 safety standards. For Tranquility SC products, only the 5 ton size (060) is required to have the RDS and the feature is optional on all other sizes.

ClimateMaster’s double isolation compressor mounting system makes the Tranquility SC one of the quietest units on the market. Compressors are mounted on specially engineered sound-tested EPDM grommets to a heavy gauge mounting plate, which is further isolated from the cabinet base with EPDM grommets to minimize vibration transmission and to maximize sound attenuation. The easy access control box and large access panels make installing and maintaining the unit easier than other water-source heat pumps currently on the market, proving that a small unit can be easy to service.

Standard Features:

Exceeds ASHRAE 90.1 efficiency standards
• Environmentally-friendly R-454B low-GWP refrigerant
• Refrigerant Detection System (RDS) (mandatory on size 060, optional feature for sizes 006-048)
• Coaxial heat exchanger
• Galvanized-steel cabinet construction
• Sound-absorbing glass-fiber insulation
• Unique double-isolation compressor mounting for quiet operation
• Insulated divider and separate compressor/ air handler compartments
• TXV metering device
• Microprocessor controls with on-board fuse and emergency shutdown
• Field-convertible discharge-air arrangement for horizontal units
• PSC three-speed fan motor (two-speed for 575V)
• Unit Performance Sentinel performance-monitoring system
• Eight standard safety features
• Non-corrosive polymer drain pan
• External Connecting Port on front-left corner post facilitates service tool connectivity, thereby reducing startup, commissioning, and service time