HVAC: устранение неполадок теплового насоса с водяным контуром Johnson Controls! Выезд на объект:...

HVAC: Johnson Controls WSHP Not Cooling! Troubleshooting A Commercial Water Source Heat Pump / HVAC: Johnson Controls Water Source Heat Pump Making A LOT Of Noise (Johnson Controls WSHP Repair) HVAC: Johnson Controls Water Source Heat Pump Not Cooling/HACK JOB (Water Cooled Heat Pump HACK JOB) HVAC (Heating, Ventilation, Air Conditioning) Service Call: Water Source Heat Pump Tripping On High Pressure Control (Heat Pump Not Working) Heat Pump Not Cooling / Heat Pumping Not Heating / WSHP Not Working / WSHP Not Cooling / WSHP Not Heating / Johnson Controls Heat Pump Troubleshooting / HVAC Troubleshooting / Commercial HVAC Training A heat pump is a system used to heat or cool an enclosed space or domestic water by transferring thermal energy from a cooler space to a warmer space using the refrigeration cycle, moving heat in the opposite direction in which heat transfer would take place without the application of external power. When used to cool a building, a heat pump works like an air conditioner by transferring heat from inside the building to the outdoors. When used to heat a building, the heat pump operates in reverse: heat is transferred into the building from the outdoors. Common heat pump types are air source heat pumps, ground source heat pumps, water source heat pumps and exhaust air heat pumps. Heat pumps are also often used in district heating systems. The water source heat pump replaces the outdoor fan and coil with a heat exchanger. For this system to work the building provides a loop of water. This water loop includes a cooling tower and a boiler to maintain the water entering and leaving the unit for optimal performance. A water-source heat pump (WSHP) is an electric heating and cooling system that uses a piped water loop or a body of water (like a cooling tower, city water, well, lake, or pond) instead of outside air to absorb and release thermal energy. It moves heat into a space during winter and extracts heat out of it during summer. How It Works: Heating mode: The unit pulls heat out of the circulating water loop and moves it into the indoor air. Cooling mode: The unit takes heat from the indoor air and rejects it back into the water loop. Central loop control: A building-wide water loop stays in a moderate temperature range (usually 60°F to 90°F) using a small boiler or cooling tower as needed. WSHP use a piped water loop instead of outdoor air to absorb or reject heat. Inside each indoor unit, a standard refrigeration cycle moves thermal energy: in cooling mode, it pulls heat from the room and dumps it into the water; in heating mode, it extracts heat from the water to warm the space. Water-source heat pumps work under the same principle as the air source heat pump with the difference being that outside air is not used as the heat source or heat sink, but instead piped water is utilized. Using piped water allows some heat pump configurations the option to be located inside the building, others may be configured as a rooftop unit. A water source heat pump is different from other hydronic systems because the water is not routed in the coil conditioning the air stream, instead the water simply provides the opportunity to absorb and reject heat from the DX cycle. The refrigerant in the coil still provides the heating or cooling at the space air heat exchanger coil. Since the refrigerant is doing the work and produces the more extreme temperatures for the system, the water simply needs to be kept with in a temperature range of 60 °F and 90 °F for a water source heat pump. This means that the boiler does not have to operate until the water temperature approaches 60 °F and the cooling tower can remain off until the water temperature approaches 90 °F . In a geothermal or ground source heat pump system, ground bores can be used in lieu of the boiler and cooling tower. Ground bores are a series of pipes that are routed into the ground. Because ground temperature is naturally approximately 50 - 65 °F the ground can act as a heat source or heat sink for the water from the heat pump system. When the loop temperature drops below ground temperature in the heating season, the ground serves as a heat source (the loop absorbs heat) and it can be a heat sink in the cooling season when the water temperature is higher than the ground temperature (the loop rejects heat). In the case of a geothermal heat pump, the bore field can also be bypassed until the water temperatures approach the limits of the acceptable range.