Thermostat for HTM Surface-Mounted Touch Fan Coil

Thermostat for HTM Surface-Mounted Touch Fan Coil

Nowadays, a device called a thermostat is commonly used to regulate the temperature in houses. The HTM touch fan coil thermostat for overhead coil units helps maintain a certain temperature. When connected to a cooling or heating system, the thermostat keeps the temperature steady by turning the system on and off in such a way that once the room reaches the set temperature, the thermostat switches off the power and if the room temperature rises or falls, the thermostat turns the power circuit back on.

 

Features of HTM Surface-Mounted Touch Fan Coil Thermostat

• Available in black and white colors
• Easy to install using a single bracket
• Automatic speed control
• Two-season mode (summer and winter)
• 5-ampere fan current

 

Types of Thermostats Based on Equipment and Functions

Digital Thermostats: These thermostats are widely used in the industry and are programmable. In fan coil systems, digital thermostats allow users to set the desired temperature for up to a week.

 

Electronic Thermostats: These thermostats receive temperature data from sensors with electronic current and transmit it to a miniature relay. The relay then activates or deactivates the electrical current based on the instructions received.

 

Electromechanical Thermostats: Electromechanical thermostats receive instructions from thermal sensors and pass them on to micro-switches that control whether the device turns on or off.

 

Applications of Thermostats

Thermostats are used in various industrial and residential sectors, including greenhouses, chillers, ducted splits, fan coils, air handling units, steam boilers, and household appliances like dishwashers, refrigerators, and electric kettles.

According to the aforementioned content, thermostats are widely used in both residential and industrial devices. Here, we focus on their application in fan coils and ducted splits.

Types of Thermostats

With advancements in technology, there are now several types of thermostats available based on their features.

 

Based on Functions

• Modulating Thermostat
• On/Off Thermostat

 

Based on Sensor Type

• Diaphragmatic
• Bellows
• Bimetallic
• Rheostatic

 

Based on Installation Location

• Room-mounted
• Immersed
• Wall-mounted
• Duct-mounted

 

 Based on Temperature

• Heating
• Cooling

 

Based on the Number of Operation Stages

• Single-stage
• Two-stage
• Step-by-Step

 Based on Seasonal Use

• Winter
• Summer
• Dual-season

 

Fan Coil

Fan coils are essential components of air conditioning systems, responsible for creating airflow at desired temperatures. They are used year-round and consist of two main parts, namely the coil and the fan. A fan coil system relies on external devices for temperature regulation, such as chilled water from a chiller or mini chiller, and hot water from a boiler or package unit.

  

Types of Fan Coils

Fan coils are categorized based on their design and the way they are placed in a space as discussed below:

Floor-Mounted Fan Coils:

Floor-mounted fan coils, as the name suggests, are positioned on the ground. They were popular due to their simple installation, low noise, and good performance but they take up space on the floor. Although their design has changed and made them more suitable for residential areas, they are now less commonly used compared to other types of fan coils. In places where ceiling or wall-mounted options are not feasible, floor-mounted fan coils can still be a good choice. Their easy access for maintenance is an advantage because air is typically drawn from the front or back and discharged from the top.

Wall-Mounted Fan Coils:

Wall-mounted fan coils are installed directly on the wall, about two meters above the ground. They look similar to the indoor units of split air conditioning systems. These fan coils can both heat and cool the space. Since they need water for operation, heating water comes from a central boiler or a residential system, while cooling water is supplied by a chiller. One key advantage of wall-mounted fan coils is their ability to provide both heating and cooling at the same time using a four-pipe system. Some benefits include uniform temperature control, washable air filters, space-saving design, attractive appearance, and the option to add a thermostat.

Cassette Fan Coils:

Cassette fan coils are widely used due to their vast range of capacities. They come in two models: one-way and four-way. Four-way cassette fan coils blow air in all four directions and should be installed in the center of a ceiling. Since the center of ceilings in residential spaces is often used for lights, this type of fan coil is better suited for commercial or office spaces. However, one-way cassette fan coils blow air in a single direction and can be placed near walls, doors, or windows. They are suitable for both residential and commercial areas. Cassette fan coils are efficient, visually appealing, and save space. As they are positioned in false ceilings, they are sometimes confused with concealed ceiling fan coils, but cassette fan coils have advanced electronic controls, remote controls, and drain pumps, making them more expensive than concealed models.

Floor-Standing Fan Coils:

Floor-standing fan coils are designed for high-capacity use. As the name suggests, they are placed on the ground and are not typically used in residential settings due to their capacity. These fan coils are best suited for large spaces such as banks, stores, hospitals, and offices. One key benefit of floor-standing fan coils is their ability to quickly cool or heat large areas. In environments with extreme temperatures, they can quickly bring the space to a comfortable level due to their strong air throw. In these fan coils, air is drawn from the bottom and discharged from the top.

Fan Coil Thermostats:

When the fan coil starts operating, it quickly reaches the desired cooling and heating temperature. At this point, a temperature sensor is needed to stop the fan coil from continuously running, ensuring it doesn’t go beyond the set temperature and keeping the fan coil’s operation under control.

A thermostat is a device that works as a thermal sensor to control the fan coil. It sends a shut-off command when the temperature reaches the desired level and a start-up command when the room temperature changes. In fact, having a thermostat helps save energy and ensures comfort for users.

 Types of Fan Coil Thermostats

• Digital Thermostat: This type of thermostat uses electricity to send commands for turning the system on or off.
• Analog Thermostat: In this thermostat, thermal sensors and mechanical components work together to control the system.
• Single-season: A thermostat that controls the temperature of a space in just one season.
• Two-season: A thermostat that can regulate the temperature in both heating and cooling seasons.

 Ducted Split

A ducted split system provides both heating and cooling for a building. In fact, a ducted split system works efficiently in both the cold and warm seasons. It has two main parts: an indoor unit and an outdoor unit, connected by copper pipes. The indoor unit is concealed and installed in a false ceiling, while the outdoor unit is placed outside the building on the roof, or in the yard, terrace, etc.

Components of a Ducted Split System

Indoor Unit

• Evaporator Coil: The refrigerant flows through this coil.
• Fan: Pulls air into the unit and pushes it back out after adjusting the temperature.
• Drain Pan: During the heat exchange between refrigerant and air, some moisture in the air forms water droplets on the coils. These droplets are collected by a drain pan and transferred to the drainage system.
• Air Filter: Air filters are installed at the indoor air outlet, which helps improve air quality.
• Thermostat: A key component used to regulate and control the temperature inside the space. The use of this component in ducted splits is explained as follows.
• Etc.

 

Outdoor Unit

• Compressor: There is refrigerant inside this component.
• Expansion Valve: It lowers the refrigerant pressure for better cooling efficiency.
• Four-Way Valve: It switches between heating and cooling modes.
• Fin: It moves air through the outdoor unit, removing heat generated by the compressor’s operation.
• Etc.

  

Types of Ducted Split Systems Based on Functions

• Cooling Ducted Split System
• Heating Ducted Split System

A ducted split system can be utilized for both cooling and heating applications. In cooling mode, the refrigerant is compressed in the compressor, leading to an increase in temperature and pressure, which is then transferred to the condenser. In the condenser, the refrigerant is cooled and converted into a liquid state. It is then carried through copper piping to the expansion valve within the indoor unit. At this point, the refrigerant experiences a significant pressure drop and moves to the evaporator. Inside the evaporator, the refrigerant absorbs heat from the surrounding air, changing into a gaseous form, before being drawn back into the compressor. The air cools as it loses heat, and returns to the environment after passing through the filters. This cycle repeats in the same way.

During heating mode, the refrigerant flow is reversed by a four-way valve. In other words, rather than being cooled by outdoor air, the refrigerant absorbs heat from the surrounding environment and warms the indoor space. When the refrigerant reaches the evaporator, it cools as it extracts heat from the surrounding air and helps to heat the indoor unit.

Note: As mentioned above, during heating mode, the refrigerant obtains heat through thermal exchange with the surrounding outdoor air. However, a potential challenge arises in winter when the outdoor air temperature falls below zero. In such conditions, the temperature difference between the refrigerant and the surrounding air causes heat transfer, which can negatively impact the ducted split system’s performance.

 Cooling Ducted Split System

The operation of this type of ducted split system is almost identical to the cooling and heating ducted split systems, except that no heating process is performed.

Ducted Split System with Hot Water Coil

In these ducted split systems, a separate hot water coil is installed within the indoor unit to provide heating during colder periods. The required hot water is supplied from a central boiler or a packaged system and sent to the coils. The outdoor unit remains off, while the fan within the indoor unit circulates air.

 

The Role of Thermostats in Ducted Split Systems

As mentioned earlier in the section on the components of ducted split systems, the thermostat is a crucial part of these systems. It helps control and regulate the room temperature to provide a comfortable environment.

Ducted split systems can use two types of thermostats: manual and digital. Digital thermostats are much more practical and effective.

 How Digital Thermostats Work

When using a ductless split system, consumers set their desired temperature through a smart panel or remote control. The thermostat, with its capabilities, checks the current room temperature and compares it with the set temperature. It then sends the system whether to adjust the cooling or heating to compensate for the temperature.

For example, during hot seasons, if the room temperature rises above the set level, the thermostat prompts the system to turn on. Furthermore, when the room reaches the desired temperature, the thermostat turns off the system. The same process happens during cold seasons to regulate heating.

Benefits of Using a Thermostat

• It ensures consistent control over heating and cooling automatically.
• It can be mounted on walls.
• It prevents excessive operation of devices.
• It helps to minimize energy usage

 

How to Purchase HTM Touch Fan Coil Thermostat

For purchasing Sampa circulation pumps, please call the contact numbers listed on our website. Our consultants will provide you with the most suitable product according to your needs.

Additional information

HTM

Additional information:

Thermostat Brand: HTM

Temperature Control Range: 15–35°C

Temperature Measurement Range: 0–50°C

Display Precision: 1°C

Measurement Precision: 1°C

Maximum Water Pump Current (A): 3

Maximum Fan Current (A): 6

Power Supply Voltage (V): 220

Dimensions (mm): 109×83×83

Weight (g): 140

 

Frequently Asked Questions (FAQ):

What are the accepted payment methods?

We accept several payment methods, including credit cards, prepaid cards, PayPal, and bank transfers, to make your purchase convenient.

 

Is international shipping available?

Yes, we ship to many countries. Please check our shipping details page to see the available destinations and shipping fees.

How can I monitor my shipment?

Once your package is shipped, a tracking number will be sent to you via email. This tracking number can be used on our website or the courier’s portal to check the delivery progress.

 

What is your return policy?

We offer a simple return process. If you are not satisfied with your order for any reason, you may return it within 30 days for a replacement or a full refund. Visit our return policy page for complete instructions.

 

Do your products come with warranties?

Yes, most products include a manufacturer’s warranty covering defects in materials or functions. Warranty terms differ based on the product. For specific details, please refer to the product description or contact our support team.

 

Shipping

All estimated shipping times are in addition to processing durations. Orders before 6:30 PM are delivered on the next business day from Monday through Friday. Orders after this time will be delivered within two business days. Weekends and holidays are excluded. Customs fees and duties for international deliveries are the responsibility of the recipient. We recommend contacting your local customs office for further details. These charges cannot be refunded if refused.

 

Free Shipping: Available for orders above 500 Toman

Europe: 1–3 days (Free)

United States: 4–6 days (Free)

Asia: 3–6 days (Free)

Africa: 5–7 days (Free)

Australia: 3–5 days (Free)

 Return & Refund

We offer a 14-day return policy, allowing you up to 14 days from the date of receiving your item to initiate a return. To qualify for a return, the item must remain in the same condition as when you received it, in other words, it must be unused and in its original packaging. You will also need to provide proof of purchase, order number, or receipt. After we receive and evaluate your returned item, we will notify you about the status of your refund. If it is approved, the refund will be issued automatically to the original payment method. Please keep in mind that your bank or credit card provider may require additional time to process and send the refund to your account.