Suction truck maintenance costs are the biggest expenses for vehicles other than refueling costs. Many owners are complaining that the maintenance cost of the 4S shop suction truck is too expensive. Actually, the maintenance costs of the suction truck are also partly due to the owners themselves. Do not know how to raise a car. In this regard, experts recommend the most cost-effective suction truck maintenance methods: First, the vehicle maintenance cycle can be according to the manufacturer's recommendations Second, the 4S shop launched a free test service not to be missed Rooftop Packaged Unit With Economizer
Economizer with exhaust damper, fresh air damper, returan air damper and exhaust air damper. The dampers can be automaticlly controlled by PLC controller or by manual based on project needs.
This type HVAC system is another energy saving in the field of air conditioning.
Interlocked to run when return air dampers are being closed and supply air blower is in operation. The extraction fans run when outdoor air dampers are at least 50% open (adjustable). It is also overload protected. A gravity exhaust damper is supplied with this option to prevent air from entering the unit during shutdown.The power exhaust fans have been size to exhaust 50% of the nominal air flow of the unit.
The schematic diagram as below like free cooling system.
Rooftop Packaged Unit With Economizer,Economizer HVAC Residential,Portable Rooftop with Economizer,Economizer Rooftop Packaged Unit Jinan Amrta Air Conditioning Co.,Ltd , https://www.waterchiller.pl
   Three points: Select 4S shop to shop around, choose the best price, the best service attitude
After buying a suction truck, the owner is the 4S shop who is the longest to deal with the car, but don't ask for the 4S shop's choice. Different 4S shop working hours and suction truck parts prices are not the same, like oil, machine filter, empty Filters and other commonly used accessories are not the same, if the vehicle needs to replace the infrequently used parts, the price difference is relatively large, even if the same brand of a number of 4S stores, the price is different. Experts here remind everyone that in daily maintenance, we must go to a few 4S stores to evaluate and see which store's price is more affordable.
Many car owners will shorten the vehicle maintenance cycle due to excessive car ownership. It is clear that 5,000 kilometers can be maintained once. Individual owners will advance this standard. Experts of the card cool suction truck network are given that it is not necessary to shorten the maintenance cycle. It is not only a waste of maintenance fees, but it is of little significance.
In order to attract consumers, many 4S stores often launch free testing activities. Experts remind car owners that they must make full use of this opportunity to understand the basic situation of their cars and solve hidden potential problems in a timely manner.
Third, update the suction truck accessories according to the manual, do not be fooled by the 4S shop
In addition to refueling expenses, vehicle maintenance costs are the biggest expense. Some 4S stores will use the owner to not understand the business. Huyou owners will change some unnecessary replacement parts, or replace some accessories in advance, such as a pollen filter. It can be changed once a year. Some 4S stores will be replaced in half a year if they want to make a profit. This causes a waste of maintenance costs and reminds the majority of owners to refer to the suction truck when they replace the suction truck accessories. Maintenance manual, unless there is excessive wear and tear.
Precautions In summary, the maintenance cost of the suction truck is largely due to the owner's incomprehensibility, so it is very necessary for the owner to carry out the maintenance knowledge of the suction truck. 
