
Bosch WT & WW Model
High-performance water-to-water heat pumps for demanding hydronic applications




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High-performance water-to-water heat pumps for demanding hydronic applications




The WT Model is available in 2-6 tons, including a wider range of voltages. This unit also provides almost limitless options for hydronic systems due to its two-stage compressor and high operating temperatures for best-in-class performance.
The WW Model is available from 10-35 tons. It is designed to meet all your needs and requirements with either one single-stage scroll compressor (sizes 120, 180, 210) or dual single-stage scroll compressor (sizes 122, 240, 360, 420) for watercooled modular.
Both the WT and WW Models meet the criteria for a lower global warming potential A2L refrigerant.

There are many load side applications for which the water-to-water heat pump/liquid chiller is ideally suited. Some typical uses are as follows: hydronic baseboard heating, hydronic in-slab floor heating, forced air fan coil heating or cooling, ice and snow melting, heating potable water (when allowed by code), heating swimming pool and spa, process fluid heating or cooling.
*Not recommended in low temperature applications or ice production
▶ Floating Compressor Base (WT only)
Reduces vibration and noise from the compressor
▶ Compressor Blanket (option)
Ensure that heating and cooling needs will be met quietly as well as efficiently
▶ Flow Proving Switch (option)
Prevents the continued operation of the compressor should the water supply fail
▶ Unit Protection Module
Monitors the unit operation to protect the unit
▶ Dual Refrigerant Freeze Sensors
Freeze protection on the source & load side of system
▶ Extended Range
Accommodates a wider range in temperature commonly found in geothermal projects
▶ Heat Recovery Package (select units)
Takes advantage of waste heat from the compressor to heat domestic water
▶ Energy Management Switch (option)
Allowing for on demand control for energy savings during non-peak hours and nightly reset

▶ Galvanized Steel Cabinet
Provides strength and corrosion protection
▶ Cupro-Nickel Coaxial Heat Exchanger (option)
Protects against corrosion when water conditions are of low quality
▶ Schrader Charging Valves
Facilitates service diagnosis by allowing the connection of refrigerant hoses quickly and securely
▶ Comfort Alert Module
This feature enhances diagnostics by analyzing compressor and thermostat data, alerting technicians with flashing LED indicators if issues occur.
▶ Unit or remote mounted controller
▶ DDC controls
▶ Compressor monitor relay
▶ Phase monitor relay
▶ Pump/valve relay

Bosch Home Comfort Group is a leading source of high quality water heating and comfort systems. The company offers gas tankless, electric whole house and point-of-use water heaters, Bosch and Buderus floor-standing and wall mounted boilers, Bosch and FHP geothermal, water-source and air-source systems as well as controls and accessories for all product lines. Bosch Home Comfort is committed to being Simply Smart by offering products that work together as integrated systems that enhance quality of life in an ultra-efficient and environmentally friendly manner. For more information, visit bosch-homecomfort.us
The Bosch Group is a leading global supplier of technology and services in the areas of Automotive, Industrial Technology, Consumer Goods and Building Technology. The company was founded in Stuttgart, Germany, in 1886 and presently has more than 440 subsidiaries and is represented in over 150 countries.
In the U.S., Canada and Mexico, the Bosch Group manufactures and markets automotive original equipment and aftermarket solutions, industrial drives and control technology, power tools, security and communication systems, packaging technology, home comfort solutions, household appliances and software solutions. The Bosch Group’s products and services are designed to improving quality of life by providing innovative and beneficial solutions. In this way, the company offers technology worldwide that is Invented for life. Additional information is available online at www.bosch.com
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