IM 777-8 • Skyline Air Handler 22 www.DaikinApplied.com
o
peraTIon
G
uIdelInes
o
peraTIon
G
uIdelInes
Startup Checks
When performing startup and service, always take thorough
safety precautions. Only trained, experienced personnel should
perform these functions.
WARNING
Rotating fan. Can use severe injury or death. Before servicing
fans, lock out and tag out power.
WARNING
Fire/electric shock hazard. Can cause property damage,
personal injury or death. Wire fan power supply and ground
motor frame in accordance with local electric codes.
WARNING
Fan motor requires overload protection. Failure to provide
motor overload protection can result in fire, property
damage,electric shock, personal injury, or death. Connect
motor to an overload protective device rated in compliance
with local electric codes.
CAUTION
Do not overheat fan motor. High air temperatures in the fan
section can cause the fan motor to burnout. On draw-through
air handlers or air handlers with the fan section down the air
stream from the heating section, the discharge air temperature
of the heating section must not exceed 104°F (40°C).
Before Starting the Unit
Before entering fan section, make sure that fan electrical power
source is disconnected and locked in the OFF position.
CAUTION
Equipment damage due to loose fasteners represents
improper start-up and equipment abuse. It is not covered by
the warranty.
1. Check that the unit is completely and properly installed
with ductwork connected.
2.
Check that construction debris is removed/filters are
clean.
3. Check that all electrical work is complete and properly
terminated.
4. Check that all electrical connections are tight and that
the proper voltage is connected. Phase imbalance must
not exceed 2%.
5. Check that ball bearings on the fan shaft and motor are
prelubricated and do not need grease before startup.
6. Check tightness of setscrews in bearings and fan
wheel(s). If retightening is needed, position the fan
wheel(s) per
Table 7
through
Table 10
;
Table 11
through
Table 13
. Torque set screws per
Table 14
and
Table 15
.
7. Check alignment of fan and motor sheaves and belt
tension. Adjust if necessary. Check tightness of sheave
setscrews and/or capscrews. See
Table 14
.
8. Leak test the thermal system to verify that connections
are tight.
9. Check that the condensate drain is trapped.
10. Rotate the shaft by hand to be sure it is free.
11. If multiple fans are supplied with a block off plate and it is
installed on one of the fans, make sure to only start the
fans without the block off plate. Do not start any fan that
has the block off plate installed on it.
12. If multiple fans are supplied with isolation dampers, make
sure the isolation dampers are fully open before starting
the fans.
