Viessmann Vitocal 100-WA: Efficient Comfort with Ground Source Heating and Cooling
GEOTHERMAL HEAT PUMP SYSTEM
A great value for long term efficiency and everyday comfort.
The Viessmann Vitocal 100-WA is a geothermal heat pump system designed to provide efficient heating and cooling using the Earth's stable energy. It offers exceptional value and performance, reducing reliance on fossil fuels and minimizing environmental impact.
Ground Source Heat Pump System Types:
- Horizontal loop: Typical installation requires a half-acre of available space where pipes are laid horizontally in trenches and backfilled.
- Vertical loop: Pipes are inserted vertically where space is limited or where soil conditions prohibit horizontal loops.
- Pond loop: A series of coiled, closed loops are placed at the bottom of an adequately sized body of water.
- Open loop: Best for homes with an abundant supply of quality well water. Water is drawn into the geothermal system, used by the system, and then discharged into an adjacent drainage ditch or pond.
Designed to Fit Your Needs
Viessmann's Vitocal 100-WA system delivers exceptional value and performance as a comprehensive heating and cooling solution. It reduces reliance on fossil fuels and minimizes environmental impact by utilizing the Earth's stored energy. The system is capable of producing Domestic Hot Water consistently and efficiently as a standard feature. Engineered for user convenience, GSHP systems are known for their durability and longevity, providing highly efficient comfort for decades.
The Vitocal 100-WA is ideal for new builds and retrofits, offering premium heating and cooling while significantly reducing environmental emissions. Viessmann's GSHP is available in five sizes, all designed for maximum efficiency and application flexibility. It features field-reversible controls and an included factory-installed desuperheater for highly efficient domestic hot water production. Compatible with any loop system and requiring minimal maintenance, this quiet, sustainable solution ensures year-round comfort with a streamlined installation process, making it ideal for commercial or residential needs.
Renewable energy from the Earth for the highest performance
Geothermal systems can be installed with various loop system configurations. Closed loops use recirculated fluid in a series of pipes installed vertically, horizontally, or in a pond. Open loops utilize abundant water sources like wells, lakes, or ponds; the water is then returned to the environment rather than recirculated in a closed loop.
Highly efficient, highly sustainable
Viessmann's geothermal systems harness the Earth's natural, consistent underground temperature to provide efficient and eco-friendly heating and cooling. Solar energy warms the ground, and approximately 47% of that heat is stored beneath the surface. Just a few feet below the frost line, the temperature remains consistently between 55°F (13°C) and 70°F (21°C) in many climates year-round, creating an ideal and reliable source for sustainable comfort.
* The terms ground source heat pumps (GSHP), geo, and geothermal heat pumps are understood to interchangeably refer to the same systems in heating/cooling contexts.
Vitocal 100-WA: Key Features and Benefits
Making use of this stable, renewable energy source, the Vitocal 100-WA delivers consistent warmth in Winter and cooling in Summer, significantly reducing your carbon footprint and energy bills.
The factory-installed desuperheater for enhanced domestic hot water production uses water heated with waste heat from air conditioning at no cost in the summer and at substantial savings in the winter. This "free preheat" technology boasts efficiencies up to 3x higher than conventional systems. Ideal for residential, commercial, and large-scale properties, Viessmann combines cutting-edge technology with sustainability to provide year-round comfort and a faster return on investment.
The difference of design
Viessmann innovation changes the game for geothermal system installation and maintenance. Field-reversible controls paired with a reversible cabinet design allow for left, right, or rear return configurations without the need for multiple SKUs. An integrated LED display makes it easy to monitor system status and operation at a glance.
Product Features
- Offers 5 different sizes: 2, 3, 4, 5, 6 ton
- Heating Capacity: 15.6 to 54.8 MBH (4.5 to 16.1 kW)
- Cooling Capacity: 20.2 to 75.9 MBH (6.5 to 22.2 kW)
- Field Reversible for left, right, or rear return configurations
- Low GWP R-454B Refrigerant
- Two Stage Compressor
- Cupro Nickel heat exchanger
- Constant pressure variable speed blower
- Integrated desuperheater with pump
- LED Information Display
Benefits at a Glance
- Robust and reliable - longer system lifespan
- Compatible with both open and closed loop systems
- Flexible configuration - left return, right return, or rear return - all-in one unit!
- Integrated desuperheater for efficient domestic hot water production
- Quiet operation with a fully insulated Indoor Unit and no outdoor unit required
- Built-in connections for easy integration with pump stations
- Save energy, lower utility bills
- Environmentally Friendly
- Self-contained refrigerant circuit in a compact monobloc design
* https://www.energy.gov/sites/prod/files/guide_to_geothermal_heat_pumps.pdf
Vitocal 100-WA Components:
- Integrated desuperheater with pump
- Flexible mounting of the junction box
- Compatible with closed and open loop systems
- Information display panel
- 2 stage compressor
Technical Specifications
Vitocal 100-WA / APIT Series
| 027020 | 040029 | 052038 | 066049 | 077056 | |
|---|---|---|---|---|---|
| Heating/Cooling Data | |||||
| Heating Capacity (MBH) | 15.6-19.1 | 23.4-28.9 | 28.9-37.6 | 37.8-48.1 | 46.2-54.8 |
| Heating Capacity (kW) | (4.5-5.6) | (6.8-8.4) | (8.5-11.0) | (11.0-14.0) | (13.5-16.0) |
| Cooling Capacity (MBH) | 30.3-39.2 | 38.1-51.9 | 49.9-65.7 | 59.8-75.9 | 20.2-26.4 |
| Cooling Capacity (kW) | (5.9-9.0) | (8.9-11.5) | (11.2-15.2) | (14.6-19.3) | (17.5-22.2) |
| Energy Efficiency Ratio (EER)* | 22.2-30.8 | 21.2-29.0 | 22.1-28.7 | 20.7-28.0 | 18.7-24.5 |
| COP* | 4.2-4.6 | 4.2-4.5 | 4.2-4.4 | 4.3-4.7 | 4.0-4.4 |
| Power Supply | |||||
| Voltage | 208/230 VAC | 208/230 VAC | 208/230 VAC | 208/230 VAC | 208/230 VAC |
| Phase | 1 | 1 | 1 | 1 | 1 |
| Hertz | 60 | 60 | 60 | 60 | 60 |
| Amps | 20.9/20.2 | 23.4/22.7 | 27.5/27.0 | 31.2/30.7 | 38.1/37.6 |
| MCA | 23.4/22.7 | 27.5/27.0 | 31.2/30.7 | 38.1/37.6 | 43.0/42.7 |
| Max. Overcurrent Protection (Amps) | 30 | 40 | 50 | 60 | 70 |
| Air Flow Data | |||||
| Air Flow / Static Pressure (CFM/w.c.) | 800/0.5 | 1200/0.5 | 1600/0.5 | 2000/0.5 | 2400/0.5 |
| Domestic Hot Water | |||||
| DHW Flow Rate (GPM) | 0.5-4.4 (1.9-16.7) | 0.5-4.4 (1.9-16.7) | 0.5-4.4 (1.9-16.7) | 0.5-4.4 (1.9-16.7) | 0.5-4.4 (1.9-16.7) |
| Dimensional Data (Dimensions HxWxD) | |||||
| Height (in. mm) | 46 (1168) | 50 (1270) | 54 (1372) | 58 (1473) | 60 (1524) |
| Width (in. mm) | 27 (694) | 32 (821) | 32 (821) | 32 (821) | 32 (821) |
| Depth (in. mm) | 26 (673) | 28 (724) | 28 (724) | 28 (724) | 28 (724) |
| Supply Air Connection (in. mm) | 16 (406) X 14 (356) | 20 (508) X 18 (457) | 20 (508) X 18 (457) | 20 (508) X 18 (457) | 20 (508) X 18 (457) |
| Return Air Connection (in. mm) | 22 ¼ (565) X 22 ¾ (578) | 26 ¼ (667) X 27 ¾ (705) | 30 ¼ (768) X 27 ¾ (705) | 34 ¼ (870) X 27 ¾ (705) | 34 ¼ (870) X 27 ¾ (705) |
| Filter Size (in.) | 24 X 24 X 2 | 30 X 28 X 2 | 30 X 32 X 2 | 30 X 36 X 2 | 30 X 36 X 2 |
| Weight (lbs (kg)) | 265 (120) | 334 (152) | 371 (168) | 388 (176) | 440 (220) |
*All published measurements are calculated with an Alternative Efficiency Determining Method (AEDM).
Technical information subject to change without notice. 7/2025 Printed in USA. ©2025 Carrier. All rights reserved.
Viessmann Manufacturing Company (US) Inc
Warwick, RI
(800) 288-0667
viessmann-us.com
A Carrier Company
Certifications:
- ETL Listed
