Westinghouse EarthDirEX 19+ EER, 3.8+ COP Geothermal Direct Geoexchange Technisches Handbuch

The Y1SA Geothermal heat pump, Earth loops 
and air handler are an incredibly quiet and 
efficient way to heat and cool your home or 
business. Because we are using the natural 
energy from the Earth, you can reduce your 
electric/utility bill by as much as 70%.

•  Single Stage - Copeland Scroll compressor

•  Electronic Expansion Valve – one valve for precise 

refrigerant control in all modes of operation

•  Interface Control Board – Two digit LED provides 

system operation, status and diagnostic information.

•  Diagnostic:  12 event/fault codes provide 

troubleshooting information

•  System Protection:  Internal controls monitor 

system operation to protect the compressor.

•  Three Minute Restart Time Delay: When the unit 

shuts down, a delay keeps the unit from restarting, 
eliminating the highest cause for compressor failure.

•  Micro-Channel – Indoor coil is all aluminum designed 

to optimize heat transfer, minimize size and cost, and 
increase durability and reliability. 

•  Earth Loop Seal Valve on 4 & 5 ton – captures 

refrigerant in the outdoor Earth loop during off mode, 
complies with ASHRAE Standard 15

•  Oil Separator - 99% efficient and has an internal filter, 

installed at the factory. A second filter (shipped with the 
unit) is to be used as a replacement in 24 to 48 hours

•  Hot Gas Bypass – Injected into evaporator to prevent 

freeze up

•  Accumulator– Protection from liquid flood back and 

future compressor failures. 

•  Sight Glass- Included for simple indication of proper 

refrigerant change.

•  Sound Blanket – Is standard equipment

•  Energy Efficient Brushless DC Blower Motor - ECM 

constant torque in all models

•  Improve aesthetics of your home - No exposed or 

noisy outdoor equipment

•  Simpler System - Our EarthDirEX™ geothermal 

systems do not use a water to refrigerant heat exchanger, 
or a pump to circulate the water