12
9 - Preliminary Checks Before Start-up
When performing startup and service, thorough safety
precautions should always be taken.
Only qualified individuals should perform these functions.
1. Check that the unit is completely and properly installed
with ductwork connected.
2. Check that all construction debris are removed and
filters are clean.
3. Check that the electrical work is complete and properly
terminated.
4. Check that the electrical connections are tight and that
the proper voltage is connected.
Belt alignment
For a quick check,
make sure that
the small rope
touch each end
of the pulleys as
shown on drawing
opposite.
Belt tensioning
90˚
5 kg
10 mm maxi.
5. Check that all holes for cable entry are tightly sealed.
6. Check tightness of setscrews on motors, bearings and
fans.
7. Check alignment of fan and motor pulleys and belt
tension (see drawings below).
8. Check that coil and drain pan connections are properly
done.
9. Leak test thermal system to insure that connections are
tight.
10. Check that condensate drain is trapped.
11. Check that fans rotate freely.
