TP32-80/2 Installation and operating instructions

710
3. Tighten the air vent screw and
completely open the isolation valves.
3.1.2 In Open Systems
1. The suction pipe and pump must be
filled and vented of air before starting
the pump.
2. Close the discharge side isolation valve
and open the air vent screw and suction
valve.
3. Fill the suction line through the plugged
tee or capped pipe (if one is installed). If
not possible, remove one of the gauge
tapping plugs in the pump flanges and
pour water into the hole using a funnel
or hose with an adapter.
All air in the pump and suction line must
be purged before starting the pump.
3.2 Check the Direction of Rotation
a. Switch the POWER OFF.
b. Check to make sure the pump has been
filled and vented.
c. Remove the coupling guard and rotate
the pump shaft to be certain it turns
freely. Replace the coupling guard.
d. Verify that the
electrical connections
are in accordance with
the wiring diagram on
the motor.
e. Switch the power
on and observe the
direction of rotation.
Gauge
Tapping
plugs (2)
Air
venting
screw
C
O
U
N
T
E
R
C
L
O
C
K
W
I
S
E
When viewed from the motor end, the
pump should rotate counter-clockwise.
f. To reverse the direction of rotation,
TURN OFF the power supply and
complete the following which applies.
• On three-phase motors, interchange
any two power leads at the load
side of the starter. On single-phase
motors, refer to the connection
diagram on the motor nameplate.
Change the wiring as required.
g. TURN ON the power and again check for
proper motor rotation.
3.3 Starting and Adjusting
a. Make sure that:
• The pump has been primed.
• The rotation is counter-clockwise
when viewed from the motor end.
• The piping connections are tight and
adequately supported.
b. Open the suction line valve completely
(if one is installed).
c. Close the isolation valve in the discharge
pipe. It should be opened gradually
after the pump is turned on. Opening
the valve too fast may result in water
hammer in the discharge pipe.
d. Start the pump.
e. Gradually open the isolation valve in the
discharge piping as explained in step c.
Open the valve completely.
f. Check the voltage and amperage at
the motor and record them. Adjust the
motor overloads if required.
g. If pressure gauges have been installed,
check and record the values as the pump
operates.
h. Check all controls for proper operation.
If the pump is controlled by a pressure
switch, check and adjust the cut-in and
cut-out pressures. If low-water level
controls are used, be sure the low-level
switch is properly adjusted so the pump
cannot run if the pump breaks suction.
4. Maintenance
4.1 Servicing the Pump Head
4.1.1 Step 1: Remove the Pump Head
1. Turn OFF the power to the motor.
2. Close any isolation valves on either
side of the pump.
Fig. 3
If the pump fails to operate or there
is a loss of performance, refer to the
Troubleshooting section on pages 11
through 14.
4.1.9 Rapid Cycling
Pump cycling should be monitored to
make sure the pump is not starting more
than 20 times per hour. If it is, premature
motor failure is quite likely, due to the
increased heat build-up in the motor. Make
any adjustments to controls ne-cessary to
reduce the frequency of stops and starts.
4.1.10 Freeze Protection
If the pump is installed in an area where
freezing could occur, the pump and
system should be drained during freezing
temperatures to avoid damage.
To drain the pump, close both isolation
valves and loosen the suction and dis-
charge flanges. Allow water to flow out of
the pump before reconnecting the pump
to the flanges. Do not tighten the flanges
completely until the pump is ready to be
used again.
5. Troubleshooting
5.1 Preliminary Checks
5.1.1 Supply Voltage
5.1.1.1 How to Measure
Use a volt meter, (set to the proper scale)
measure the voltage at the pump terminal
box or starter.
On single-phase units, measure between
power leads L1 and L2 (or L1 and N for 115
volt units). On three-phase units, measure
between:
• Power leads L1 and L2
• Power leads L2 and L3
• Power leads L3 and L1
4.1.8 Service Conditions
Severity of
Service
Ambient
Temperature
(maximum)
Atmospheric
Contamination
Grease
Interval
(hrs.)
Approved
Types of Grease
Standard 104°F (40°C) Clean, little corrosion 5500 Shell Dolium R
Severe 122°F (50°C) Moderate dirt, corrosion 2750 Chevron SR#2
Extreme >122°F (50°C)
or class H ins.
Severe dirt, abrasive
dust, corrosion
550 Or compatible
equivalent grease
Evaluation
When the motor is under load, the voltage
should be within ±10% of the nameplate
voltage. Larger voltage variation may
cause winding damage and indicate a poor
electrical supply. The pump should not be
operated until these variations have been
corrected.
If the voltage constantly remains high or
low, the motor should be changed to the
correct supply voltage.
Fig. 6
5.1.2 Current Measurement
5.1.2.1 How to Measure
Use an ammeter, (set on the proper scale)
to measure the current on each power lead
at the terminal box or starter.
Current should be measured when the
pump is oper-ating at constant discharge
pressure.
5.1.2.2 Evaluation
If the amp draw exceeds the listed
service factor amps (SFA) or if the current
imbalance is greater than 5% between
each leg on three-phase units, check the
following: