How to determine the maintenance cycle of air conditioning box according to the operating environment?

The air conditioning box maintenance cycle should be formulated based on operating hours, inlet contamination, wet conditions, load and component specifications, and adjusted based on trend records. You can’t stipulate the same number of months for all units, and you can’t put off necessary maintenance just because it looks clean on the outside.

Use different triggering criteria for different components

The filter can be judged based on the pressure difference, pollution conditions and usage restrictions; the coil and drainage structure need to pay attention to dust accumulation, water accumulation and wet season conditions; the fan motor should be checked according to the specific structure and instructions. Requirements in continuous production, construction dust or high-humidity environments may be significantly different from those in intermittent operation of clean machine rooms.

The operation basis should include accumulated hours, shifts and seasonal load changes; the status basis should include pressure difference, cleanliness, drainage and abnormal trends; the component basis should include specific model maintenance requirements and usage restrictions. The three types of basis correspond to different components and risks, and cannot only use one calendar period. What operating status should be recorded during daily inspection of air-conditioning boxes? Please refer toWhat operating status should be recorded during daily inspection of air-conditioning boxes?。

Operating hours and shifts determine the base cycle

The cumulative operating hours vary greatly between units operating continuously, in two shifts, in single shifts and in intermittent operation. Fan bearings, belts, and filters will require more frequent inspections on units with many hours of operation. After the shift changes, the original maintenance cycle may need to be adjusted. The operating hours record should correspond to the equipment number and cannot be estimated based on calendar only.

How to calculate fan energy consumption by operating period, please refer toHow to calculate the energy consumption of air conditioning box fans separately according to operating periods? . For the impact of night duty air supply costs, please refer toWhat impact do chemical filters have on the cost of night duty air supply?。

Inlet contamination and filter pressure differential dictate filter maintenance

The filter maintenance interval should be determined based on the inlet particle concentration and pressure difference changes. For projects with high dust content during construction, coastal salt spray, industrial dust or return air dust, the filters will accumulate dust faster, and the inspection and replacement cycles need to be shortened. Replacement only for a fixed number of months may be left untreated when the pressure differential is extremely high, or may be excessively replaced when the pressure differential is still low.

How to configure filter classification, please refer toHow to configure the primary-efficiency and medium-efficiency filters of air-conditioning boxes in different stages? . How to select the filter level according to the inlet air conditions, please refer toHow to select the air conditioning box filter grade based on the inlet air conditions? . The pressure differences at each level should be recorded separately, and there should not be just one total pressure difference.

Wet conditions and drainage status determine coil and drain pan maintenance

Coils are prone to dust accumulation, microbial growth, or poor drainage under wet conditions. Water accumulation in the drain pan, blockage of the drain outlet and failure of the water seal may lead to mildew or corrosion of the box. In high-humidity seasons or units operating with continuous dehumidification, coil cleaning and drainage inspection should be more frequent.

How to combine the slope of the water pan of the air-conditioning box with the layout of the drain outlet, please refer toHow to combine the slope of the water pan of the air-conditioning box with the layout of the drain outlet? . Why water sealing is often needed for negative pressure drainage of air conditioning boxes? Please refer toWhy does negative pressure drainage of air conditioning boxes often require water sealing? . For the influence of coil head-on wind speed on water entrainment, please refer toWhat impact does the coil head-on wind speed have on heat exchange and water entrainment in the air conditioning box?。

Environmental corrosiveness and box condition affect structural inspection

Boxes, frames and fasteners in coastal, chemical or high-humidity environments may corrode more quickly. The maintenance cycle should include inspection of the appearance of the box, sealing strips, coatings and fasteners. When rust, seal deterioration, or insulation moisture is found, inspection intervals should be shortened and repair options evaluated.

How to judge whether it is appropriate to retain the old cabinet before renovation, please refer toHow to judge whether the retained box is suitable before rebuilding the old air-conditioning box? . Box board thickness and structure, please refer toWhat indicators should be used to determine the thickness of air conditioning box panels?。

How does the cycle gradually become more appropriate from the first version?

First establish a plan based on the instructions and on-site risks, and then record the findings and review results after implementation. If an abnormality occurs in advance every time, the cycle should be adjusted or the environmental reasons should be solved; if the status is stable, it should also be evaluated and optimized by the maintenance team within the allowable range. Maintenance dates, projects and responsible persons must be traceable, and there cannot be only calendar reminders without completion records.

For condition checks before starting the machine for the first time, please refer toWhat conditions need to be checked before the air conditioner is turned on for the first time? . How to change the debugging sequence from stand-alone to system linkage, please refer toHow to change the debugging sequence of air conditioning box from stand-alone unit to system linkage?。

Aili industrial supporting equipment

Aili Industrial can provide corresponding information based on the actual configuration of the equipment, and the user can combine the operation records with maintenance findings to make it easier to formulate maintenance arrangements suitable for the site. Aili's industrial manufacturing end covers independent R&D and production of motors and fans, control systems, sheet metal, air filters and complete machine assembly. Maintenance requirements for filters, coils, fans and control components can be corresponded in the same set of delivery materials; parts lists and maintenance records can be retained for non-standard configurations.

Product form can be viewedAir handling unit andFan box page; clean air supply package can be combinedFFU fan filter unit andEFU equipment end fan filter unit verification; terminal particle filtration can be combinedHEPA/ULPA filter confirmation; when it comes to gaseous pollution control, you can communicate separatelyChemical filter solutions. The specific maintenance cycle, inspection items and delivery scope still need to be confirmed based on the corresponding configuration data and on-site operating conditions. Actual results are subject to on-site inspection and maintenance records.

Submit project parameters:https://ailigy.com/contactus.html

Related questions and answers

Can all air-conditioning boxes follow the same maintenance cycle?
cannot. Depending on operating hours, inlet contamination, wet conditions and component requirements, maintenance intervals should be determined separately.

Is it okay to only look at the number of months of use for filter maintenance?
not enough. Fixing the number of months may be too early or too late and should be judged in conjunction with differential pressure, inlet contamination and usage restrictions.

Can Aili Industrial help formulate maintenance intervals?
Maintenance items and cycles can be checked based on equipment configuration, operating environment and component requirements. Specific arrangements must be confirmed based on on-site operation records.

Related articles

1. What operating status should be recorded during daily inspection of air-conditioning boxes?

2. How to configure the primary-efficiency and medium-efficiency filters of air-conditioning boxes in different stages?

3. How to combine the slope of the water pan of the air-conditioning box with the layout of the drain outlet?

4. How to judge whether the retained box is suitable before rebuilding the old air-conditioning box?

Key points for selection and acceptance inspection