Preparing Unit For Operation; Spring Isolated Fans - Daikin Maverick II MPS062E Installation And Maintenance Manual

Spring Isolated Fans

Releasing Spring Mounts
Moving machinery hazard. Can cause severe injury or death.
Moving machinery hazard. Can cause severe injury or death. Before servicing
equipment, disconnect power and lock off. More than one disconnect may be
required to de-energize unit.
The optional spring-mounted supply and return fans are locked
down for shipment. Hold-down fasteners are located at each
spring mount. Remove these fasteners before operating the
fans. Figure 38 shows a typical spring mount. Note that the
3/8" hold-down bolt securing the fan base to the unit cross
channel must be removed.
After removing the hold-down fasteners, rock the fan assembly
by hand to check for freedom of movement.
Figure 37: RDT Spring Mount Hold Down Fasteners
Hold-down
fasteners
Figure 38: Fan Spring Mount Adjustment
Leveling
screw
Spring
mount
assembly
Cross
channel
* Grossly out-of-adjustment thrust restraints can affect this dimension. Recheck
after thrust restraints are adjusted.
www.DaikinApplied.com
WARNING
Hold-down
fasteners
Jam nut
Fan base
/ 3 " 8 ± / 1 " 4
with fan running
Adjusting Spring Mounts
Moving machinery hazard. Can cause severe injury or death.
Start the fans for the first time according to the
Procedures" on page 68. If this is not done, equipment damage, severe
personal injury, or death can occur.
Do no use impact tools for field spring mount adjustments as damage to bits
or to the bolt slot may occur.
To adjust spring mount compression, perform the following:
1. Loosen the 0.625-18 UNF hex nut.
2. Place additional weight on the fan sled frame and use
a lever to slightly compress the spring or raise the sled.
This will allow the bolt to turn freely.
3. Place one or two drops of oil on the threads if needed.
NOTE: The greatest friction that makes adjustment difficult,
comes from the surfaces of the top of the upper-
rebound plate, both sides of the 0.625" washer, and the
underside of the sled. If friction is occurring at these
point, relieve the weight and oil the friction surfaces.
4. Use a flat blade socket drive bit (1/2" drive handle
recommended) and make sure that when adjusting the
slotted bolt, that the upper-rebound plate also turns. This
action allows the bolt to push the compression plate up
or down with the lease friction occurring between the
0.625" washer and the underside of the channel.
NOTE: If the spring compresses to far, lift the sled before
turning. If the spring does not compress enough,
place weight on the sled corner, forcing it down
before turning.
5. Re-adjust the position of the lower-rebound plate so that
the sled has at least 3/4" travel and not more than 1.25"
of travel.
Figure 39: Spring Mount
33

Preparing Unit for Operation

WARNING
"Check, Test, and Start
CAUTION
IM 991-2 • MAVERICK II ROOFTOP
Preparing Unit for Operation