How does a 4 pipe fan coil unit work?
4 pipe fan coil systems have two water loops (hot and chilled water) throughout the building connected to each fan coil. The water loops are insulated. Providing heating and cooling with water has a very low transportation (pump work) cost making fan coils an energy-efficient system choice.
How do you size a fan coil unit?
For residential rooms, it is calculated at 120-140W per square. After obtaining the demand for cooling capacity, we can obtain the fan coil air volume according to the air volume Q=3100* cooling capacity/air inlet/outlet temperature difference of 10.
What is a ducted fan coil unit?
As part of an HVAC system found in residential, commercial, and industrial buildings using ducted split air conditioning or with central plant cooling, a fan coil unit is often connected to ductwork and a thermostat to regulate the temperature of one or more spaces as well as assisting the main air handling unit for …
What is the difference between a fan coil unit and a blower coil unit?
Unlike fan coil units where the fan is directly coupled to the motor, blower coils typically use a belt drive system to transmit power from the motor to the fan. This allows the fan to run at whatever speed is required simply by changing the pulley set in the unit.
What is the advantage of a 4 pipe fan coil unit system over a 2 pipe fan coil system?
The 4 pipe system has two available sources (heating and cooling) which makes the fan coil independent of the system mode. Unlike to the 2 pipe system, it can cool and heat at the same time allowing for dehumidification to occur. This is the configuration required when setting up an analog valve in a 2 pipe fan coil.
Do fan coil units dehumidify?
Fan coil units provide conditioned air to the area served by recirculating space air through the coils. Fan coil units are designed to provide dehumidification of the area served; however, the amount of dehumidification provided can be limited by increasing the chilled water supply temperature.
How do I know what size evaporator coil I need?
If the evaporator must move 400 gallons per minute: 14 x 400 = 5,600. Multiply the answer by 500: 5,600 x 500 = 2,800,000. This answer is the evaporator’s size, measured in BTUs per hour. Divide the answer by 12,000: 2,800,000 / 12,000 = 233.33.
What are the major components of a fan coil unit?
The basic components of a fan coil unit are a heating/cooling coil, fan section, and a filter. Units may stand alone within a single space or be ducted to serve multiple spaces, and can be controlled by a manual switch, thermostat, or building management system.
How much does it cost to replace a fan coil unit?
A new fan coil unit may range from $200-$1500 based on the brand of your unit and the size of the equipment. Professional installation, which is recommended for best results, will range from $700-$2700 depending on your region’s average pricing.
How many types of FCU are there?
There are four types of fan coil units (FCUs); horizontal chassis above a ceiling void, horizontal exposed, underfloor and vertical wall mounted units.
What is the difference between a 2 pipe and 4-pipe fan coil unit?
Fan coil units and unit ventilators served by a two-pipe system contain only one coil which serves as the heating and cooling coil, depending upon the system. The four-pipe system includes a distribution system that contains both hot water supply with return lines and a chilled water supply with return lines.