installation &
operating instructions
Design Envelope
4300
&
4380
Vertical In-line Pumping Unit
31
cate the stationary seat O-ring or L-cup with a small amount
silicon or glycerine lubricant and firmly press down straight
and even into the adapter cavity. Do not press the seat in
with bare fingers or hammer it down, use a clean cloth or the
cardboard disc typically supplied with the seal packaging.
Contamination of the polished and lapped stationary seat
face could cause leakage. If the adapter was removed from
the motor, taking care that the stationary seat is carefully
guided over the stub shaft when assemble the adapter back
onto the motor.
•
Lubricate the inside of the rotating seal [seal head]
(62)
with a small amount of silicon or glycerine lubricant and
slide onto the stub shaft
(21)
with a twisting motion, carbon
face first, until the carbon face is pressed firmly against the
stationary seat
(61)
. Firmly press on the rotating seal [seal
head] metal parts with a screw driver all the way around
the seal which will ensure that the faces are mated properly.
Remove the spring retainer from the seal spring and place
the seal spring over the rotating seal.
l
Replace pump impeller
•
Install the impeller key on the shaft and place the seal spring
retainer onto the impeller hub register. Slide the impeller in
place on the stub shaft.
•
Take care and ensure that the seal spring is kept in place on
the seal rotating assembly and fits well into the retainer on
the impeller hub.
m
Tighten impeller cap screw
It is good practice to replace self locking screws, once removed.
Install the impeller cap screw and washer
(83 & 86)
. Hold
the impeller the same way as when the cap screw was success-
fully loosened (pry bar or screw driver placed carefully
between the impeller blades) and tighten the cap screw with a
socket wrench.
p
Install new adapter O-ring
Insert new adapter O-ring into the O-ring groove of the adapter
and apply silicon or glycerine lubricant around the O-ring.
q
Clamp Ring
Insert Clamp Ring thru the impeller and adapter flange. Tighten
the nut on the clamp ring to
90-100
lbs-in.
r
Lower rotating assembly into place
The rotating assembly motor, adapter and impeller combina-
tion may now be lowered into the casing.
s
Casing and adapter clamp-ring
The casing and adapter clamp-ring is now installed and tight-
ened with a wrench.
Reconnect the flush/vent flex hose assembly [check for dam-
age and replace if necessary].
t
Isolation valves
Replace the casing drain plug and open the suction and dis-
charge isolation valves.
Motor wiring
•
The motor conduit and its wiring are now replaced. If the
motor is new, double check that the voltage and rpm are
identical to the original motor.
•
Be sure to check rotation of the motor after rewiring if the
motor is three phase and correct if necessary, by switching
any two lead wires.
•
Ensure that the pump is filled with water before operating to
check rotation.
u
Conduit Box Cover
The conduit box cover is replaced after checking the motor
rotation. The pump may now be placed in operation.
6.4 system cleanliness
Before starting the pump, the system must be thoroughly
cleaned, flushed and drained and replenished with clean liquid.
Welding slag and other foreign materials, Stop Leak and clean-
ing compounds and improper or excessive water treatment are
all detrimental to the pump internals and sealing arrangement.
Proper operation cannot be guaranteed if the above conditions
are not adhered to.
Содержание Design Envelope 4300
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