Tranquility® 18 (SC)
Compact Single-Stage Water-Source Heat Pump
ASHRAE 90.1 Compliant • Low-GWP Refrigerant
[View Specifications] [Download Submittal]
The Tranquility® 18 (SC) Compact Series combines installation flexibility, high efficiency, and advanced controls for commercial water-source heat pump applications.
Compact Cabinet Design
Designed for retrofit installations and tight mechanical spaces while maintaining high performance and service accessibility.
Low-GWP Refrigerant
Uses R-454B refrigerant to help meet evolving environmental regulations and reduce global warming potential.
High Efficiency Operation
Exceeds ASHRAE 90.1 efficiency standards, delivering reliable performance for commercial water-loop systems.
Application Flexibility
Multiple model sizes and configuration options allow the unit to support a wide range of commercial applications.
Performance Monitoring
Unit Performance Sentinel® monitoring helps detect abnormal system conditions and protect long-term equipment performance.
Communicating Controls
CXM2 communicating controls provide advanced diagnostics and integration with building automation systems.
The Tranquility® 18 (SC) Compact Series is engineered for serviceability, durability, and long-term performance. Key internal components are designed for easy access, reliable operation, and integration with advanced controls.
Advanced Control Board
The control box houses the CXM2 communicating control system and optional DXM2.5 controls, providing advanced diagnostics, real-time system monitoring, and integration with building automation systems.
- Supports BACnet, Modbus, and Johnson Controls N2 integration
- Provides service access to real-time operating conditions and fault history
Serviceable Internal Components
The blower assembly, compressor mounting, and condensate management components are designed for easy access, reliable operation, and long-term durability in commercial HVAC applications.
- Blower housing is designed for easier service access
- Double-isolation compressor mounting helps reduce vibration and sound
The Tranquility® 18 (SC) Compact Series supports advanced control capabilities and integration with building automation systems. Communicating controls provide real-time system monitoring and diagnostics, as well as flexible integration with building management systems.
CXM2 Communicating Controls
The CXM2 control platform provides advanced diagnostics, system monitoring, and service access. Real-time operating conditions and fault history help technicians quickly identify and resolve system issues.
Remote Monitoring
The optional iGate® 2 communicating thermostat provides cloud-based monitoring, allowing system performance to be tracked remotely while enabling advanced diagnostics and system management.
Building Automation Integration
The unit can integrate with common building automation systems using industry-standard communication protocols for centralized monitoring and control.
A range of accessory options are available to support installation flexibility, system control, and long-term system performance for Tranquility® 18 (SC) units.
Thermostats & Controls
- iGate® 2 communicating thermostat
- Thermostat options for various control configurations
- Wall sensors for building automation system integration
Piping & Installation Components
- Braided hose kits
- Manual water valves
- Motorized water valves
Filtration Options
- 1-inch MERV 8 air filters
- 2-inch MERV 8 air filters
- 2-inch MERV 13 air filters
Download technical documentation, installation resources, and product information for the Tranquility® 18 (SC) Compact Single-Stage Series.
Submittal Data
Detailed technical specifications including performance data, dimensions, and electrical requirements.
Installation Manual
Complete installation, operation, and maintenance instructions for the unit.
Product Catalog
Overview of product features, configurations, and available options within the Tranquility® series.
Specifications
Engineering specifications suitable for project documentation and system design.
Additional Technical Resources
- CXM2 Controls Manual
- DXM2.5 Controls Manual
- Thermostats & Accessories Documentation
Find answers to common questions about the Tranquility® 18 (SC) Compact Single-Stage Series, including system applications, refrigerant technology, and installation considerations.
The Tranquility® 18 (SC) is a compact single-stage water-source heat pump designed for commercial geothermal and water-loop HVAC systems. It is engineered for tight mechanical spaces and retrofit applications.
The Tranquility® 18 (SC) is available in sizes 006 through 060, covering a capacity range of approximately 0.5 to 5 tons.
The unit uses R-454B low-GWP refrigerant, helping meet evolving environmental regulations while maintaining high efficiency.
Yes. The SC series is designed to fit tight mechanical spaces and is backward-compatible with many older water-source heat pump installations, making it ideal for retrofit projects.
Yes. With communicating controls and optional interfaces, the system can integrate with BACnet, Modbus, and Johnson Controls N2 building automation protocols.
Water-source heat pumps are commonly used in office buildings, schools, hotels, healthcare facilities, and multifamily properties where water-loop or geothermal HVAC systems are installed.