Product Features
High Efficiency and Sufficient Energy
The coil adopts high-quality seamless copper tubes and aluminum sinusoidal corrugated fins, which are formed through hydraulic or mechanical tube expansion. The fins are tightly connected to the copper tubes to achieve optimal performance.High Airflow and Low Noise
Equipped with an ultra-wide-angle volute and a multi-blade centrifugal fan wheel, the fan wheel and motor are reasonably matched to ensure low noise and meet various needs of the unit.Safe, Reliable, and Long-lasting
The motor is a B-class induction motor with a built-in temperature rise protector, which generally will not burn out under normal circumstances. Each unit coil undergoes high-pressure leak detection to ensure no water leakage.Wide Application
This product is widely used in low-noise places such as hotels, office buildings, shopping malls, hospitals, restaurants, and exhibition halls, meeting people's requirements for comfort.
Installation
The unit should be installed by professionals who are familiar with this type of product and local regulations.
To eliminate potential accidents during transportation, a leak detection test (1.0 MPa) should be performed on the unit coil before installation.
Before installation, check if the preparatory work is ready, including air ducts, water pipes, electrical wire connections, and fixed screws for the unit.
Vertical units should be installed on a horizontal surface; horizontal units should be hung, and it is recommended to use full-threaded screws with a diameter of 6-8 mm, along with flat washers, spring washers, and nuts for fixation. The lifting points should be secure and strong enough to bear the weight and vibration of the unit during operation. When hanging the unit, ensure that the water tray slopes towards the drain pipe by more than 5° to facilitate the outflow of condensed water.
When connecting water pipes to the unit, it is recommended to use flexible connectors and Teflon tape for sealing. Do not use excessive force when connecting pipes, and the torque should not exceed 205.6 N·m to avoid cracking and leakage.
Install a water filter on the water inlet pipe of the unit to prevent dirt from clogging the coil. The inlet water should be softened to ensure the heat exchange efficiency of the coil.
Valves should be installed on the inlet and outlet water pipes of the unit to regulate water flow and cut off the water source during maintenance. The pipes should be pre-insulated to prevent condensation water leakage.
A filter should be installed at the inlet of the chilled water pump to prevent dirt from clogging the coil.
For units without air filters, install a filter screen at the return air inlet to prevent dust from clogging the coil fins and ensure heat exchange efficiency.
Before wiring, check if the voltage, frequency, and phase number of the power supply match the unit requirements, with a power supply voltage deviation not exceeding 10% of the rated voltage. The power supply and switch connections should be strictly in accordance with the electrical schematic diagram, and the grounding wire should be reliably connected. The wiring diagram is shown below.
It is strictly prohibited to use a single thermostat to control multiple units.
Installation of Vertical Exposed-mounted Units: Fix the unit on the ground. Adjust the level to create an angle of about 5° in the direction of water tray drainage for easy drainage. Sufficient space should be reserved on both sides of the unit for connecting water pipes and power cords. When cleaning or replacing the filter, push it upward by about 10 mm and then pull it out horizontally towards the return air inlet.
System Pressure Testing and Water Filling
Before conducting system pressure testing on the vertical exposed-mounted fan coil unit air conditioning system, a pressure testing plan should be formulated first, selecting an appropriate pressure testing pump and formulating a reasonable pressure testing water circuit. During the pressure testing process, carefully record the testing status and monitor changes in system pressure head at all times. When formulating the pressure testing plan, pay attention to the following points:
Before adding water to the coil, open the air vent valve on the water collector and close it after all the air in the coil is exhausted.
The water pressure test should be conducted at a temperature above 5°C; otherwise, antifreeze measures should be taken.
The water pressure test should be pressure-increased in sections, slowly and evenly. After the water pump stops operating and the water pressure stabilizes, carefully inspect each connection for leaks. Repairs should not be performed under water pressure.
Water should be added to the system in layers, with layer-by-layer exhaust and testing operations.
After confirming that there are no leaks in the system piping, it is best to insulate the piping according to the design plan.