A heater is a device that creates air heat flow to heat rooms. Externally, it looks like a section of the air duct where air masses are heated. Depending on the coolant, they can be water, electric or steam. In addition, air coolers are also called heaters. When choosing a heater, take into account the following circumstances:
- room area;
- weather;
- ventilation power.
Any heating equipment sooner or later exhausts its service life and must be replaced. Scheduled preventative maintenance will protect you from breakdowns and help significantly increase the service life of your equipment.
Causes of heater failures
Breakdown of air heaters occurs for various reasons, the main one being defrosting. The heater may defrost due to its design or due to improper operation of the automation.
Design features of heaters
European air heaters often have tubes of smaller diameter, as they are designed for tap water without hardness salts. In actual use in our conditions, few people pay close attention to the quality of water. Hardness salts, iron, and impurity particles are deposited on the walls of pipes and channels and narrow their lumen. As a result, water freezes in some sections of the pipeline. Negative consequences include stopping the operation of equipment, deformation and rupture of pipes and connections, up to the complete unsuitability of the system. To avoid such problems, it is necessary to take into account the quality of the water, use a water treatment system, or choose heaters with a sufficient diameter of the tubes. As a preventive measure, washing should be carried out regularly with special reagents that dissolve scale and deposits.
Automation settings failure
Correctly configured automation prevents the air and water heater from freezing. If the settings fail, the equipment may defrost and fail.
Air heater protection. When the air temperature drops, the thermostat is activated: it stops the fan, closes the air damper and fully opens the three-way valve.
Water heater protection. The sensor monitors the return water temperature and, when it drops, activates frost protection: it stops the fan, closes the air damper and fully opens the three-way valve.
Causes of heater malfunctions
Dwelling in more detail on the main reasons for equipment failure (forgetfulness of the owner, as a result of which the heater turns off at subzero temperatures, as well as “amateur” installation, replete with unacceptable errors), we list not only these, but in general all possible problems leading to extremely unpleasant consequences.
- The automatic control and protection unit is disconnected from the network (which, at subzero temperatures, quickly leads to complete freezing of the system).
- The air valve servomotors are connected (or selected) incorrectly.
- The air damper is not tightly closed.
- There is no air filter.
- The water valve servomotors are connected (or selected) incorrectly.
- There is no water valve.
- The water and/or air valves are installed improperly, preventing them from fully opening or closing.
- The water valve stem is not installed correctly.
- Coolant circulation is not possible due to lack of pressure difference (installation error).
- The volume of coolant passing through the body of the heater clearly does not meet the technical requirements (installation error, manufacturer’s defect, or user violation of operating rules).
- Clogged heater tubes.
- The anti-freeze thermostat is not connected correctly or is missing.
- The room or duct control temperature sensor is installed incorrectly.
- The 3-way valve is not calibrated.
- The coolant cannot be heated to the required temperature.
- The selection of the mixing unit was made without taking into account the characteristics of the system (the circulation pump is missing or produces an unacceptable flow rate, the valve diameter is too large or insufficient, etc.).
- The input and output to the water heater are reversed when connected (the result is a significant loss of power and approximately a 75% chance of defrosting).
- Air has entered the heater or supply system.
- Automation does not work correctly or unpredictably (standard reasons are the lack of professional commissioning or its implementation with serious violations);
- Servo drives and/or temperature sensors are not of the same type as the automatic controller.
- The mode was not switched from “summer” to “winter”.
- Problem with the circulation pump (not functioning or incorrectly connected).
- The coolant is not supplied or does not go to the return line.
- The mixing unit was assembled with many violations.
Urgent repair and replacement of air heaters
Most often, heat exchangers are defrosted in winter, when the need for their uninterrupted operation is especially high. If this happens, urgent repair or replacement is necessary. Contact the professionals! Not only will we repair the accident, but we'll also offer a preventive maintenance schedule throughout the year so you never have to deal with problems like this again.
It is better to carry out maintenance of air heaters in the summer, when the ventilation system operates in air supply mode without heating. Specialists will check the automation settings, wash and pressure test the equipment. We provide a guarantee for all types of work. Contact us to ensure reliable and long-lasting operation of your equipment.
water heater for fresh air ventilation
water heaters for fresh air ventilation from a warehouse in St. Petersburg and provide delivery throughout the Leningrad region . Email:. Ventilation heat exchangers…
The water heater for ventilation is designed and supplied according to the size of the air duct and the available power of water heating, namely in accordance with the temperature of the incoming water and return water, as the design calculation of the hot water parameters is based on 95/70 degrees. But in real life, hot water for ventilation heaters is supplied from the general district thermal power plant, and the temperature of the water there is lower than required, so you have to operate the supply system at a lower fan speed. In some cases, in factories or buildings that have their own thermal power plant, it is possible to use process hot water specifically for ventilation and heating systems with a constant temperature of 90 degrees and above throughout the fall and winter.
TYPES OF AIR HEATERS FOR VENTILATION AND AIR CONDITIONING SYSTEMS
HEATERS; DUCT HEATERS; RECOVERY RECOVERERS
COOLANT CIRCULATION IN HEATING SYSTEMS
WATER FAN HEATERS
SUPPLY VENTILATION UNITS
Maintenance and repair of heat exchangers
Any heat exchange equipment once exhausts its service life and must be replaced. Planned preventative maintenance helps to significantly increase the service life of heaters. It is enough to comply with only two conditions: regular maintenance and timely repairs and replacement of components. will draw up a maintenance schedule for you, calculate the costs of consumables and plan the timing of replacement of heat exchangers. These measures will not only significantly extend the life of your equipment, but will also protect you from accidents and associated unnecessary costs. Our service center specialists will answer all your questions.
Repair of ventilation system heat exchangers
Ecolife provides a full range of services for the maintenance and repair of ventilation heat exchangers in all types of buildings and structures in Moscow and the Moscow region.
Diagnostics of the ventilation system
The frequency of maintenance of ventilation systems is not established by regulations. However, for all types of premises, any equipment and its operating conditions, scheduled diagnostics are provided at least twice a year.
An urgent examination is carried out in the following cases: • increased noise, appearance of extraneous noise; • malfunctions of automation; • occurrence of foreign odors; • reduction in system power and performance; • other noticeable changes.
The most common causes of malfunctions are heater defrosting, fan failure and heater overheating. In the first case, the automatic system itself stops the operation of the heat exchanger, the fan and heater usually fail due to improper operation and systematic violation of the rules of use.
Stages of ventilation system heater repair
The stages of repair work are determined on site after the causes of the breakdown have been determined. The heat exchanger model, operating conditions, degree of damage and other factors are taken into account.
Procedure for work in case of ruptures: 1. diagnosis of damage using pressure testing, analysis of ruptures and the entire scope of work; 2. soldering of damage with the application of hard solder patches; 3. repair or replacement of damaged rolls; 4. checking for tightness of soldering using the crimping method; 5. test check of the entire system and its launch.
If necessary, in parallel with repair work, craftsmen carry out cleaning and disinfection, check fittings for leaks, change gaskets, repair safety and check valves, and adjust water distribution devices. Repairs are considered cost-effective if their cost does not exceed 30% of the total price of the heat exchanger, otherwise the equipment must be replaced.
Heater repair cost
The total cost is determined by the following factors: • the nature of the damage; • service life; • costs of components; • labor-intensive and complex repairs.
The cost of repairing a plate heater is lower the earlier you notice a drop in performance and seek help. The sooner you call a specialist, the lower the repair costs. The cost of repairs is significantly reduced by periodic maintenance carried out according to a clear schedule, scheduled repairs and timely replacement of worn parts. The more accurately maintenance schedules are observed, the higher the likelihood of long, uninterrupted equipment service.
When replacing, only original components from official suppliers are used. The technicians who dismantle and install equipment have specialized education and extensive practical experience in repair work. Maintenance complies with all requirements of the equipment manufacturer and technological regulations.
Having spare parts in stock saves time on delivery from the official manufacturer and significantly reduces the time required for repair and maintenance work. All types of work and spare parts are covered by a guarantee.
Ecolife LLC specialists visit the site and carry out on-site diagnostics and calculations for each specific heater model, individually solving each client’s problem.
Work performed during the repair of ventilation heaters
Repairing heaters and ventilation heat exchangers is a responsible job and should be performed only by experienced professionals. During the work, heaters, whose task is to ensure the movement of room air through heat exchangers, wear out and fail. During the work, worn parts are replaced, while high-quality ventilation repairs also include inspection of equipment and replacement of elements and assemblies with significant wear. This allows you to significantly increase the overhaul period and increase the reliability of equipment operation.
Minor repairs, including replacement of wearing parts, are carried out at the installation site. To carry out a medium repair, a partial, and to carry out a major repair, a complete dismantling of the system with transportation of components to the repair site will be required. With these types of repairs, individual components and worn parts are replaced.
Advantages of Ecolife
Ecolife LLC professionally and highly repairs any models of plate heat exchangers:
• strictly and seriously adheres to the schedule of preventive and maintenance work; • offers a full range of heater maintenance services; • maintains a high level of knowledge of its specialists; • solves the problem of each client individually; • performs work of any level of complexity.
We repair heat exchangers at competitive prices with consistently impeccable quality of work. Call us. Professionals will solve your problem!
