Daikin Applied (UK) Ltd.
REV A
– PAGE 9. SECTION 11 ADDED. 11/03/14
Page 16 of 37
nameplate.
Note!
All access panels must be closed during this test, otherwise false
readings will be obtained.
Commissioning & Testing (continued)
Start-up Checks (continued)
4) As drive belts stretch the most during the first four (4) hours of operation the tension
of the belts must be checked and adjustment made after this time. Again after 48
hours of operation the tension of the belts must be checked and adjustment made
after this time. The alignment of the pulleys must also be checked to ensure the
motor fixing is properly secure and not allowing the motor to twist round.
It is recommended that a close inspection be performed after the unit has been running
for approximately 7 days from original start up. A check should be made to ensure: -
1)
The drive belts and pulleys are still correctly tensioned and aligned (adjust if
necessary).
2)
There are no loose components within the unit.
3)
No foreign matter is blocking the coil fins, filters or fan impeller.
Drive Belts
Belts should be examined each month for tension, alignment and any signs of wear. If
one belt in a matched set is found to be damaged the whole set must be changed.
Extreme care must be taken when tensioning belts. Excessive tension will cause
overloading of the fan / motor bearings and cause damage to bearings, shafts & belts.
Insufficient tension will cause belt slip leading to excessive noise and belt wear.
