Page 100 - Fan Coil Unit

FAN COIL UNIT / AIR CONDITIONING

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Precautions for Fan Coil Unit Installation, Maintenance and Useecautions for Fan Coil Unit Installation, Maintenance and Use

1. Installation Preparations

1. Transportation
Two people should handle transportation, and the device may be damaged if dropped or impacted during transport.
2. Storage/Stacking
When storing on site, do not open the packaging and do not stack more than 6 layers.
When storing outdoors, make sure to wrap well with plastic or similar material to protect it from rain and snow.
3. After Unpacking
3-1 After installing the product at the site, be sure to block the product's suction port.
If foreign substances enter the product during construction, it may cause a deterioration in product performance or malfunction.
3-2 If the external case is damaged or scratched, re-painting is not possible, so please handle it with care.
4. Product Installation
4-1 Install the product horizontally to ensure smooth condensate drainage.
4-2 All products must have enough space to insert and remove the filter.
4-3 Please install so that there are no obstacles near the suction and discharge ports.

2. Driving Preparations

1. Check the condition of the power plug.
2. Perform air purging inside the heat exchanger to check for any residual air.
* When starting the unit for the first time or after an extended shutdown, you must use the air purging valve on the heat exchanger to remove any trapped air
in the heat exchanger and piping.
3. If the valve is installed as an option, check the condition of the control valve in the piping line.
4. Check the presence/absence of the air filter and its cleaning status.
5. Ensure that there are no factors that could interfere with the operation around the fan coil unit.

3. Precautions During Product Use

1) Frost Caution (Summer Season)
When the fan coil unit is in contact with outside air or air with high temperature and humid (relative humidity of 80% or more), cold water flows in the heat
exchanger, and water droplets form on the outside of the product and wet the floor regardless of whether the fan is operating or not.
Please operate while paying attention to the following.
A) During operation – Operate the refrigeration unit after starting the fan coil unit operation.
B) During shutdown – Stop the refrigeration unit first, and then stop the fan coil unit.
C) During partial operation – When one refrigeration unit or several fan coil units are stopped for an extended period (more than 12 hours), be sure to shut off
the water supply. Operating cold water circulation with the fan stopped can cause water droplets to form on the exterior of the casing, leading to moisture
on the floor. If the cold water cannot be shut off, operate the fan at low speed (L). (We strongly recommend the use of individual ON/OFF valves.)
D) During operation in hot and humid conditions – Directing some of the airflow for partial cooling purposes is not the original intended use of the fan coil
unit. In such cases, water droplets may accumulate on the surface. To prevent water droplets from falling onto the floor, place a drip tray underneath and
connect a drainage pipe to allow for proper drainage.
E) During cooling operation, avoid installing any heat-emitting objects inside the room where the fan coil unit is installed.
2) Cold Weather Precautions (Winter Season)
During the winter, there is a risk of the heat exchanger freezing and bursting due to operation stoppage, so please operate with caution according to the following.
A) Operate the circulation pump continuously to circulate water. Especially in extreme cold weather, operate the hot water boiler at a temperature low
enough to prevent freezing and circulate hot water.
B) If not used for an extended period, completely drain all water from the entire device, including the heat exchanger interior and piping.
C) For products with a ceiling cassette or MICOM controller, freeze prevention automatically operates under the condition that individual ON/OFF valves are installed.
3) End of Season Precautions
If the cooling/heating season has ended, and the fan coil unit will not be used for an extended period, completely drain all water from the entire device,
including the inside of the heat exchanger and the piping.
4) Usage and Maintenance
A) Turning off the device during use by cutting off the power supply can cause damage to the components and may lead to malfunctions.
B) For ceiling cassette type products with built-in condensate pumps (not natural drainage), cutting off the power supply may result in the residual
condensate not being discharged, potentially causing water overflow. Some valves will not close when power is lost, leading to continuous condensate
generation and possible excessive charges in some billing systems.
C) Do not place computers, furniture, clothing, or other objects directly below ceiling or ceiling cassette type products. Equipment malfunction or damage
may occur due to water dripping, depending on the humidity in the installation location.
D) Modifying or changing components arbitrarily can cause product malfunctions, and in the case of malfunctions, the manufacturer may not be held
responsible and warranty repairs may not be possible.
E) The drain plate and coils can accumulate dirt over time, which may cause performance deterioration, leakage, and odors. Therefore, please clean them
every 2-3 years.

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