General • Maintenance

Daikin Roofpak Heating and Cooling RPS/RDT/RFS/RCS 015D—140D: Semi-Annual Maintenance

The semi-annual maintenance procedure is for checking and replacing your equipment's R7/R8 enclosure exhaust air filter. If installed in an appropriate environment, the drive requires very little maintenance. This procedure lists the routine maintenance intervals recommended by Daikin.

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10/24/2021

Daikin Roofpak Heating and Cooling RPS/RDT/RFS/RCS 015D—140D: Semi-Annual Maintenance

Periodic Service and Maintenance

Check all moving parts for wear every six months.
Check bearing collar, sheave, and wheel hub setscrews, sheave capscrews, and bearing hold-down bolts for tightness every six months.

Setscrews

Setscrews are used to lock sheaves, locking collars, and fan wheels to their shafts. They must be checked periodically to see that they have not loosened. If this is not done, severe equipment damage could occur.

Using Table 30, check the tightness of all setscrews with a torque wrench. Note that if the return fan bearings setscrews must be retightened, a special procedure is required to equally load both bearings (see “Return Fan Bearing Setscrews” ).

Table 30: Setscrew Minimum Torque Specifications

Return Fan Bearing Setscrews

Because the return fan is mounted on a vertical shaft, the following procedure must be used to retighten any return fan bearing setscrews that have loosened. This procedure will provide that both bearings are equally loaded

If one bearing is carrying the entire weight of the fan, it could fail prematurely.

Loosen the fan belts.
Support the weight of the fan and the fan shaft with timbers or some other suitable means (see the fan shaft support in Figure 119).
Verify that the upper shaft collar is securely fastened to the shaft. Check the setscrew torque.
Loosen the upper and lower bearing setscrews. The entire weight of the fan and shaft is now supported by the fan shaft support.
Retighten all bearings to the torque specification given in Table 28. Remove the fan shaft support and retension the belts.

Source: Daikin (oslo.daikinapplied.com)

Periodic Service and Maintenance

Check all moving parts for wear every six months.

Check bearing collar, sheave, and wheel hub setscrews, sheave capscrews, and bearing hold-down bolts for tightness every six months.

Setscrews

Setscrews are used to lock sheaves, locking collars, and fan wheels to their shafts. They must be checked periodically to see that they have not loosened. If this is not done, severe equipment damage could occur.

Using Table 30, check the tightness of all setscrews with a torque wrench. Note that if the return fan bearings setscrews must be retightened, a special procedure is required to equally load both bearings (see “Return Fan Bearing Setscrews” ).

Table 30: Setscrew Minimum Torque Specifications

Return Fan Bearing Setscrews

Because the return fan is mounted on a vertical shaft, the following procedure must be used to retighten any return fan bearing setscrews that have loosened. This procedure will provide that both bearings are equally loaded

If one bearing is carrying the entire weight of the fan, it could fail prematurely.

Loosen the fan belts.

Support the weight of the fan and the fan shaft with timbers or some other suitable means (see the fan shaft support in Figure 119).

Verify that the upper shaft collar is securely fastened to the shaft. Check the setscrew torque.

Loosen the upper and lower bearing setscrews. The entire weight of the fan and shaft is now supported by the fan shaft support.

Retighten all bearings to the torque specification given in Table 28. Remove the fan shaft support and retension the belts.