Xylem IM129 R01 BF03S - Manual (Page 4)

4
WARNING
3. A manual disconnect switch should be located close to
the pump where required by code.
4. It is recommended this pump and motor be grounded in
accordance with prevailing electrical codes. Provisions
are provided for attaching ground wires to both motor
and pressure switch. Ground screws are located under
motor end cover and in the pressure switch.
IMPORTANT: After connecting wiring, DO NOT RUN
PUMP until it has been filled to priming opening with clean
water.
Connect power from a dedicated grounded circuit to the
Line terminals on the pressure switch. The connection
between the switch and the motor is made at the factory.
The circuit breaker should be OFF when the connections
are made by a qualified electrical technician.
INSTALLATION WITH POSITIVE
SUCTION HEAD
On installations where the pump takes its water from a
source of supply that is at a higher elevation than the pump,
the pump operates under what is known as positive suction
head.
When the BF03S is used on this type of installation, install
a partially closed ball valve in the suction line to create
suction head at the pump.
To determine if a suction lift has been created, disconnect
tube from air volume control. With pump running, air
should be taken into tube. This can be determined by plac-
ing finger over end of tube. When reconnecting tubing, be
careful not to cross the threads. Be sure the joint is air tight.
OPERATION
After making absolutely sure that the power
is OFF, remove the motor cover. Check that
the impeller turns freely. Turn the centrifugal switch
mechanism by hand or with a screwdriver. If the shaft turns
freely, reinstall the cover. On a new pump, if the pump
is bound the motor may have been damaged in shipping.
Return it to the place where purchased.
PRIMING INSTRUCTIONS
Prime the pump by removing the priming plug on the
motor adapter and filling the casing with water. It should
hold about 3 quarts. Replace the priming plug and open the
faucet closest to the pump. See Figure 1.
Pump is now ready to be started. Check all plumbing con-
nections and then turn power ON.
Pump should pick up prime within a few minutes. The
longer the suction pipe the longer it will take to prime. If
the pump does not prime turn power OFF and check for air
leaks on suction piping and on the Air Volume Control
tubing and fittings. Repair all air leaks, refill casing with
water and start pump by turning power ON.
After the pump is fully primed, open a few more faucets.
When all air is expelled from the plumbing and the water
flows steadily close the faucets. Pressure should build up
to 40 psi and the switch should turn the pump OFF. The
pump is designed to run continuously whenever water is
being used and to turn OFF only when water usage (flow)
stops. If the switch does not go off it may require a minor
adjustment.
INSTALLATION WITH POSITIVE
SUCTION HEAD
OPERATION
The pressure switch adjustment must be
made with the power ON and the pump
motor running. This adjustment should be made only
by qualified technicians familiar with working on “hot”
electrical devices. Remove the switch cover and locate the
tallest and largest spring/nut assembly. Turn the 3 ⁄
8
" hex nut
counterclockwise to lower the cut-out pressure. The safest
tool to use is a 3 ⁄
8
" nut driver with a hollow shaft, next best
is a 3 ⁄
8
" box end wrench. One full turn changes the setting
2 psi. After adjusting the OFF setting it will be necessary to
run through a cycle to insure that the pump runs continu-
ously when you use water. Do this by opening 2-3 faucets
for a few minutes and then close them. Pump should go to
approximately 40 psi and turn OFF. Reinstall the switch
cover and tighten the screw.
Note: Extreme seasonal variations in the well water level
may require adjustments to the switch to prevent rapid
cycling or to allow the pump to shut off. The switch
adjustment instructions are on a label inside the switch
cover.
MAINTENANCE
MECHANICAL SEAL
The mechanical shaft seal in this pump is not adjustable. If
a continuous and steady leak occurs around the shaft it is
an indication that the mechanical seal needs replacing. To
replace seal, observe the following instructions. See Repair
Parts page for part identification/nomenclature.
REPLACEMENT OF MECHANICAL SEAL
To Dismantle:
Turn off power on pump motor branch circuit and discon-
nect line wires to pressure switch. Close valve in house
piping. Drain pump. For procedure, see Seasonal Service
Instructions.
Remove 8 hex bolts holding motor adapter to pump casing
and lift off rotating element assembly including motor and
motor adapter.
Place motor and rotating element assembly on table, bench
or other convenient working space and remove guide vane
bolts and take off guide vane. See figure 4.
A.O. SMITH MOTORS - Remove motor end cover. Insert
7 ⁄
16
" open end wrench, under switch mechanism onto flats
on motor shaft. While holding the shaft against rotating,
turn the impeller counterclockwise. The impeller should
turn completely off the shaft in this manner. See figure 2.
Using two screwdrivers, pry out rotary seal assembly. See
figure 3.
Using two small screwdrivers pry out the stationary seal and
Buna cap.
DANGER
MAINTENANCE
Figure 2