McQuay Skyline IM 777-1, Руководство по установке и обслуживанию

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McQuay IM 777-1 27
Service and Maintenance
To remove 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
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 39
.
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 39
.
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 39 .
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 39: Single coil installation/removal
Removing Stacked Coils
Note – Top and bottom stacked coils are held together with steel
plate and screws on one side and drain trough and
screws on the other side. Remove the plate and trough
before removing the coils. The coils cannot be removed
attached together.
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 bolts holding the coil in place and then lift and
pull out the coil from the side.
4
Remove the steel plate and the drain trough that hold the
coils together.
5
Remove the bolts on both ends of the top coil holding it in
place and then lift and slide the coil out.
6
Remove the bolts on both ends of the bottom coil holding it
in place and then lift and slide the coil out.
Installing Stacked Coils
1
Slide the bottom coil through the opening in the coil section
onto the bottom coil rests.
2
Place the coil up against the coil bulkheads to prevent any
air bypass around the coil.
3
Once the coil is in place, bolt the coil to the section.
4
Caulk the mounting surface of the steel plate and install the
plate on the coils.
5
Caulk the mounting surface of the drain trough and install
the drain trough on the coils.
6
Caulk the seams between the coil casings and blockoffs .
Coil
Connection end
Coil
Opposite connection end
Coil
Bulkhead
Coil
Rests