Daikin Vision, Installation And Maintenance Manual

Page: 46 / 56

IM 915-13 • VISION - EXTENDED SIZES 46 www.DaikinApplied.com
Service and Maintenance
Removing the Fan Assembly
1. Remove the side panels and any intermediate supports
(follow instructions for side panel removal).
2. Once the panels and any intermediate supports are
removed, disconnect the neoprene bulk head seal that is
attached to the fan discharge.
3. Remove the four discharge angles that hold the
neoprene canvas in place around the discharge opening.
4. Disconnect the fan sled from each of the corner mounts
and pull the entire assembly out the side of the unit.
5. After the fan sled is out, loosen the fan bearings and pull
out the shaft.
6. Disconnect the fan housing from the fan sled, and
bearing support by removing the attaching bolts.
7. Replace the new fan, reconnect the shaft and bearings
and put the fan assembly in the cabinet.
8. Replace panels and fasteners.
Removing and Replacing the Coil
The coil can be removed by the side, top, or a combination of
both. The size and configuration of the coil affects how the coil
can be removed. Single banks of coil are fastened only on the
connection side of the unit. Stacked and staggered coils are
fastened on both ends of the coil. See the instructions in this
section for details to remove each coil type.
Before removing the coil, disconnect all piping. The instructions
below assume the coil is mounted in a sectionalized coil
section where the frame channel can be removed without
affecting other components. If the coil section is unitized with
other components, removing the top frame channel requires
removing additional panels.
Removing Single Coils
NOTE: Single coils are bolted to the unit on the connection
end. The connection end is held in place with a
clamp. See Figure 69 and Figure 70 .
1. Disconnect all piping and remove the brass plugs for the
vents and drains located in the connections.
2. Remove all screws and remove the access panel.
3. Remove the screws holding the coil in place.
4. Lift and pull the coil out the side.
Installing Single Coils
1. Slide the coil through the opening in the coil section onto
the bottom coil rests.
2. To prevent any air bypass around the coil, place coils up
against the coil bulkheads. See Figure 66 and Figure 70 .
3. Once the coil is in place, fasten the coil to the section.
4. Caulk the seams between the coil casings and
bulkheads. See Figure 69 and Figure 70 .
5. If this is an additional coil being installed and not
a replacement, locate the coil supply and return
connections dimensionally. Carefully drill holes in the end
panels of the unit.
6. Remove the brass plugs for the vents and drains on the
connections.
7. Slip the panel over the connections.
8. Replace the brass plugs and panel fasteners.
Figure 69: Single Coil, Top Installation/Removal