How To Properly Perform Heat Pump Repair Work

Is your Heat Pump System not working properly and you cannot afford Repair Costs?

If your heating and cooling system are not running you may need to perform heat pump repair work to regain the correct forced airflow into your home or business so that you do not need to call a heat pump and air conditioner service company.

In today’s article, you will learn how to properly fix broken heat pumps if the average costs are too costly to install any type of heat pump into your home or business.  You will also learn how properly taking care of your heating and air system will save you money on your energy bills as well as how great it is for home improvement.

For a first-hand look on how to repair a heat pump, be sure to watch the following video:

How To Properly Service and Repair Your Heat Pump System

In order to detect the degree of wear of the heat pump equipment and its associated components, it is necessary to periodically carry out service work, which consists of effectively finding a weak spot in the system. Diagnostics of the heat pump helps to identify faults. It involves checking the equipment while the system is running. In this case, the specialist has the ability to measure the functional performance of the serviced system.

Often the reason for calling a repairman is the unstable operation of the system using a heat pump. For example, a technician may be required to fix a leak or fill the system with a refrigerant.

In addition, the repair is often associated with the installation of new heat exchange devices, which replaced the unfrozen old ones. However, the most unpleasant repair operations involve the replacement of compressor equipment.

Also, breakdowns result from the shutdown of compressor suction valves, constant maximum loads on system equipment and sticking of thermostatic valves in the open state. In general, such defects arise due to violation of regulatory requirements for the operation of equipment, frequent critical performance or late diagnostic procedures.

Regularly carried out service activities make it possible to prevent the breakdown of the heat pump, which is usually accompanied by large monetary costs for repairing the device.

Features of Heat Pump Diagnostics

Based on the above, it can be concluded that, in order to determine the defects of the heat pump, the equipment should first be started, and then measuring and accounting measures should be started with a reference to the functional parameters.

During diagnostics it is necessary to determine:

-The ambient temperature in the room served

-Outside air temperature

-Suction pressure

-The pressure in the feed area

-The degree of overheating of steam leaving the evaporator.-Voltage and amperage supplied to the compressor

If the problem cannot be determined explicitly, it is recommended to determine the level:

-Pressure drops on the filtering refrigerant elements

-Voltages and currents received by the fan

-Inlet temperature in the evaporator

-The outlet temperature in the evaporator

-Inlet pressure in the evaporator

-Filling, temperature, and viscosity of the lubricant in the compressor crankcase

-The heat pump can fail due to inaccurate installation work, erroneous calculation of the external and internal circuits, violation of the technology of operation of the device and neglect of design instructions.

Repair of Heat Pump Equipment

Measures for the repair of heat pump equipment are almost similar to measures aimed at eliminating faults in the refrigeration equipment. Usually repairing a heat pump consists of:

-Eliminating refrigerant leakage and refilling the system. This type of repair is quite simple. Using the device, the master determines the leak zone, then removes the defect and replenishes the system with freon.

-Replacement of compressor equipment. This event is the most time consuming and costly.

-Replacing thawed heat transfer devices. The success of this operation depends on a quick search for the necessary components.

-Replacement of circulating pumping equipment.

-The main reasons for stopping the operation of the heat pump

The unstable operation of the heat pump can be associated with high pressure in the evaporator, which occurs due to:

-breaks in the intake valves of the compressor

-high load on the thermostatic valve

-increased evaporator area

-critical thermostatic valve stop in the open state

-increased system load

-use of inefficient compressor units

In addition, the heat pump may cause functional failures at high condensation pressure resulting from:

-closed discharge valve

-an uncooled condenser operating under conditions of increased temperature in the working area or restricted access

-the excess volume of freon injected into the system (liquid accumulates in the condenser)

small capacitor area

-condenser contamination

-the presence of non-condensable gaseous substances in the system.

The heat pump is a modern energy source, on the basis of which hot water supply, heating, and air conditioning systems are built. Compared to electric, diesel, and gas heat generators, the principle of its operation is to obtain the thermal energy contained in the environment. The heat necessary for the effective operation of the engineering system can be stored in a pond, rock or soil.

One of the main advantages of using a heat pump is the maximum level of user comfort. For example, a system that uses liquid fuel is quite flammable, has a design for removing combustion products and emits an unpleasant odor during operation. In addition, the user must always monitor the fuel reserves for the normal operation of the system. All these conditions are leveled by using a heat pump.

When installing an electricity-powered system, you may encounter a lack of power in the building’s electrical network. To solve this problem, it is rational to use the installation, which consumes 75 percent less electricity compared to the classical heating system.

From the above, it can be concluded that the heat pump contributes to saving not only energy but also financial resources. Today, the energy market is divided into value blocks. The most expensive energy carrier is electricity. 

Diesel fuel costs a little less. And, finally, the most affordable is gaseous fuel. As time has shown, the cost of energy carriers is prone to constant changes with a decrease in the price corridor between their types. Despite the large cost of a geothermal pump compared to a diesel-fueled boiler-house that has a chimney and automatic control, the payback period of the first option is three to five years.

How Different Type of Heat Pumps Work and Operate

Rocky Breed

If the role of heat source is performed by rocky rock, a well is used to reliably submerge the pipeline. There is also the possibility of drilling a certain number of shallow holes in order to save money. In this case, it is necessary to focus attention on obtaining the total estimated depth.

To perform preliminary calculations, you can use the indicator of fifty to sixty watts of heat per meter of good depth. From this, it follows that the organization of a well, whose depth is 85 meters, will be able to ensure the performance of the heat pump at a level of 5 kilowatts.

Priming

The optimal solution for the organization of the external earth contour is a wet ground, which is close to underground aquifers. Dry soil is also a suitable solution, but in this case, an increase in the length of the external contour will be required. Each pipe should be sunk into the soil at a distance of the order of one meter. In this case, the pipelines should be at a distance of 0.8-1 meters from each other.

A pipeline sunk into the ground must have a specific heat output in the range of 20-30 watts per meter of space. Based on this, we can conclude that a thermal circuit having a length of 350-450 meters can ensure the performance of heat pump equipment at a level of 10 kilowatts. To do this, you need to organize a plot of land measuring 20 by 20 meters.

To organize the external contour of the heat pump, it is not necessary to prepare the ground. If you perform a correct calculation, the piping system will not adversely affect vegetation located near it.

Water

If the construction site is located near the reservoir, the latter will become an ideal source of heat energy for organizing an engineering system based on a heat pump. This option involves laying the outer contour in the bottom of the river or lake. 

Its ideality manifests itself in a sufficient ambient temperature (water in a river or lake has a positive temperature even with the onset of severe frosts), a short external circuit and a high rate of heat transformation using heat pump equipment.

A pipe meter can provide a heat pump output of 30 watts. Thus, to install a heat pump with a capacity of 5 kilowatts, you need to organize an external circuit, the length of which will be 150 meters.

To ensure the bottom stability of the pipeline, it is necessary to lay about five kilograms of cargo per meter of pipe.

Warm Air Mass

It should be said about the existence of air heat pumps, which are based on an air heat exchanger. It makes it possible to obtain thermal energy from the air mass, for example, from the exhaust channel of the ventilation system. In most cases, such heat pumps are connected to exhaust hoods of industrial companies, which are characterized by large volumes of heated air mass released outside.

Such a variant of heat pump equipment can be used in low-rise buildings to operate the hot water system in the warm season.

Feasibility of using Peak Electric Reheat

Almost all models of heat pump equipment are supplied with electric heaters. The reason for this decision is the fact that when choosing heating equipment its average performance is calculated. Costing is performed with an emphasis on heat load during the coldest period of the year.

The heat pump is a producer of economically available energy, but its cost cannot be positioned as low. In this case, the electric heater has a low cost, but the production of energy by it is an expensive pleasure. By combining these two heat sources, the user simultaneously reduces capital costs and the payback time of the heat pump.

Active and Passive Air Conditioning with Heat Pump Operation

The operation of the heat pump in winter contributes to the transportation of thermal energy from the surrounding space, which is subsequently used to meet the needs of the heating system. 

In the summer, everything happens the other way around. Low-potential energy, the temperature of which is within 7-9 degrees Celsius, ensures efficient operation of the air conditioning system. The concept of a heat pump operating on cooling does not seriously differ from the device working on heating. 

The difference lies in the fact that in the first case, the radiators are replaced by fan coils. Passive cooling is the circulation of coolant from the well to the fan coils and back. Thus, low-potential energy is in the air-conditioning system without a compressor.

For more information on how to properly repair your heating and air conditioning system as well as your heat pump, be sure to read the following related articles.

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1 Response to How To Properly Perform Heat Pump Repair Work

  1. Abigail Terry says:

    If you do not feel confident in trying to fix your heat pump yourself, I highly advise contacting your local HVAC company for help.

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