AquaScape EXT 12000-3P Anleitung und Wartung - Seite 5
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• Power cord should be protected by conduit or by cable
and be of proper gauge. It should be no longer than
necessary.
• Power should be drawn directly from a box with circuit
breaker protection or with a fused disconnect switch.
Pump End Assembly
• Inspect all pump parts (O-ring, O-ring groove, impeller hub
ID, motor shaft, etc.) and clean if necessary.
• Check motor rotation prior to pump assembly.
• Install threaded rod in end of the motor shaft, leaving
.725"± .005" extended beyond the end of the motor shaft.
Use thread locker to secure in place, let cure overnight.
• Install motor shaft heat shrink tubing sleeve at this time if
required.
• Place slinger over motor shaft.
• Using a silicon based grease such as Molykote 111
lightly grease the OD of the seal head casing/o-ring and
the pump bracket seal bore. Press the seal head assembly
into the pump bracket seal bore to stop by applying
pressure only on the seal casing shoulder (do not press
on the seal head carbon.), a 1-3/4" socket has the right
clearance to press on the seal casing shoulder. Wipe away
any grease squeeze out.
• Lightly grease the seal seat (mating ring) o-ring and
impeller hub ID, press the seal seat into the impeller hub to
bottom, making sure the o-ring has not dislodged and the
seal seat sits fl at in the bottom of the impeller hub. Wipe
away any excess grease. Lightly chamfer the impeller cap
recess.
• Align the bracket over the motor mounting holes and C
face. Install bracket/motor mounting bolts and washers.
Tighten to 75 in. lbs.
• Place 3/16" square key in motor shaft keyway. If a motor
shaft sleeve is installed, the end of the square key will slide
underneath.
• Clean both seal faces with a lint free tissue and alcohol.
WARNING: Do not use grease on the seal faces.
Slide impeller onto motor shaft aligning key and
keyways until seal faces touch.
• Slide the impeller further towards the motor, compressing
the seal and hold in place while placing rubber impeller
washer over the threaded rod until it bottoms in contact
with the motor shaft. Impeller metal washer is next placed
on top of the rubber impeller washer, lightly grease the
side of the metal washer that will contact with the rubber
washer. Lock the impeller in place with the 3/8"-16 hex
jam nut, tighten to 50 in. lbs.
• Lightly grease the impeller cap o-ring gland, place the
o-ring in the gland and lightly grease the outside of the
o-ring and the impeller nose opening. Assemble the
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impeller cap w/ o-ring onto the threaded rod tighten to 50
in. lbs.
• Place large o-ring into the o-ring gland in the pump
bracket, use grease only if required.
• Assemble volute into position aligning over impeller.
• Secure volute to bracket using the supplied fi ve
5/16"-18 x 4" through bolts with washers, lock washers
and nuts and three 5/16"-18 x 1-1/4" long bolts with
washers and lock washers into the molded inserts.
Tighten all bolts to 75 in. lbs.
• Apply thread sealant to the drain plug threads, tighten to
seal.
• Discharge hardware is supplied as it uses non-standard
(and possibly hard to fi nd) nuts.
Disassembly
• Shut off power to motor before disconnecting any
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electrical wiring from the motor.
• Disassemble volute from bracket by removing the fi ve
5/16"-18 x 4" long hex cap screws, and the three 5/16"-
18 x 1.25" hex cap screws.
• Pump/Bracket/Impeller Assembly may now be pulled back
from the Volute.
• Remove impeller eye 'cap' by unscrewing
counterclockwise. Remove impeller locknut, unscrew
counterclockwise. Slide impeller off of motor shaft.
• Remove mating ring from impeller. Eye protection is
strongly recommended. (If you are replacing the seal)
• Detach bracket from motor.
• Remove mechanical seal from bracket by pressing out
from the back. Do not dig out from the front. (If you are
replacing the seal).
General Maintenance
• The pump must be drained before servicing or if stored
below freezing temperatures. Periodic replacement of seals
may be required due to normal carbon wear.
• Lubrication: Rotary Seal - Requires no lubrication after
assembly.
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