Your home is equipped with a fan coil unit which is a simple system for heating and cooling your home by way of a heating/cooling coil and fan. It is part of the HVAC system installed in your home’s building. The fan coil unit itself does not have any ductwork and it is used to control the temperature only in your unit by way of your thermostat.
The system operates as follows: the coil receives hot or cold water from a central plant (the mechanical room) and removes or adds heat from the air through heat transfer. The unit has its own thermostat to moderate temperatures. The system circulates the hot or cold water through to coil to condition your rooms. The mechanical room contains equipment for removing heat from the central building’s closed-loop as well as equipment to remove heat such as a chiller or a cooling tower and equipment for adding heat to the building’s water such as a boiler or a commercial water heater.
Good maintenance of your fan coil can save energy dollars and prolong the life of the system. Carefully read and follow the manufacturer’s literature on use and maintenance. The guidelines here include general information only.
A clean filter will help to keep your home clean and reduce dusting chores. Remember to change or clean the filter monthly during the heating season (year-round if you also have air conditioning). A clogged filter can slow airflow and cause cold spots in your home. Although it takes less than one minute to change the filter, this is one of the most frequently overlooked details of normal fan coil unit care.
Buy filters in large quantity for the sake of convenience. You will find the size and type printed along the edge of the filter that is in your unit.
If you have a permanent, washable, removable filter, you need to clean this monthly. Use water only to clean the filter, tap to dry or air dry, and leave unit off for a brief period. Do not use soaps or detergents on the filter.
The heating system was designed with a furnished home in mind. If you move in during the cooler part of the year and have not yet acquired all of your draperies and furnishings, the home may seem cooler than you would expect.
A new heating system may emit an odor for a few moments when you first turn it on. An established system may emit an odor after being unused for an extended time (such as after the summer months if you do not use air conditioning). This is caused by dust that has settled in the ducts and should pass quickly.
Return Air Vents
For maximum comfort and efficient energy use, arrange furniture and draperies to allow unobstructed airflow from registers and to cold air returns.
Depending on the style of home, temperatures can normally vary from floor to floor as much as 5 degrees or more on extremely cold days. The fan coil unit will typically cycle on and off more frequently and for shorter periods during severe cold spells.
The fan coil unit will come on automatically when the temperature at the thermostat registers below the setting you have selected. Once the unit is on, setting the thermostat to a higher temperature will not heat the home faster. Thermostats are calibrated to within plus or minus 5 degrees.
Have a trial run early in the fall to test the fan coil unit. (The same applies to air conditioning in the spring.) If service is needed, it is much better to discover that before the heating season.
Troubleshooting Tips: No Heat
Before calling for service, check to confirm that the:
- Thermostat is set to “heat” and the temperature is set above the room temperature.
- Blower panel cover is installed correctly for the unit (fan) to operate.
- This panel compresses a button that tells the blower it is safe to operate. Similar to the way a clothes dryer door operates, this panel pushes in a button that lets the fan motor know it is safe to come on. If that button is not pushed in, the unit will not operate.
- Breaker on the main electrical panel is on. (Remember, if a breaker trips you must turn it from the tripped position to the off position before you can turn it back on.)
- Filter is clean to allow airflow.
- Vents in individual rooms are open.
- Air returns are unobstructed.
Even if the troubleshooting tips do not identify a solution, the information you gather will be useful to the service provider you call.
The Remington Group Limited Warranty Guidelines
We will install heating systems according to local building codes, as well as to engineering designs of the particular model home.
Adequacy of the system is determined by its ability to establish a temperature of 21 degrees C, as measured in the center of the room, 5 feet above the floor. In extremely cold temperatures (5 degrees below or colder), the system should be able to maintain a temperature differential of 25 degrees from the outside temperature.
Fan Coil Unit Sounds
Expansion or contraction of metal ductwork results in ticking or popping sounds. While eliminating all these sounds is impossible, The Remington Group will correct oil canning. (Oil canning occurs when a large area of sheet metal like those found in air ducts makes a loud noise as it moves up and down in response to temperature changes.)
Thermostats are calibrated to plus or minus 5 degrees.
Do not operate a humidifier with the air conditioner. If you notice condensation on windows, the humidifier should be adjusted to a lower setting. Clean the moisture pad according to the manufacturer’s instructions and suggested timetable.