Electrical / Operation
7
1. Install, ground, wire and maintain this pump in accordance with electrical
code requirements. Consult your local building inspector for information
about codes.
2. Provide a correctly fused disconnect switch for protection while working on
motor. Consult local or national electrical codes for switch requirements.
3. Disconnect power before servicing motor or pump. If the disconnect
switch is out of sight of pump, lock it open and tag it to prevent unexpect-
ed power application.
4. Ground the pump permanently using a wire of the same size as that speci-
fied in wiring chart, below. Make ground connection to green grounding
terminal under motor canopy marked GRD. or
.
5. Connect ground wire to a grounded lead in the service panel or to a metal
underground water pipe or well casing at least 10 feet long. Do not con-
nect to plastic pipe or insulated fittings.
6. Protect current carrying and grounding conductors from cuts, grease, heat,
oil, and chemicals.
7. Connect current carrying conductors to terminals L
1
and L
2
under motor
canopy. When replacing motor, check wiring diagram on motor name-
plate against Figure 6. If the motor wiring diagram does not match either
diagram in Figure 6, follow the diagram on the motor.
IMPORTANT:
115/230 Volt single phase models are shipped from factory with
motor wired for 230 volts. If power supply is 115 volts, remove motor canopy
and reconnect motor as shown in Figure 6. Do not try to run motor as
received on 115 volt current.
8. Motor has automatic internal thermal overload protection. If motor has
stopped for unknown reasons, thermal overload may restart it unexpected-
ly, which could cause injury or property damage. Disconnect power
before servicing motor.
9. If this procedure or the wiring diagrams are confusing, consult a licensed
electrician.
PRIMING THE PUMP
NOTICE:
‘Priming’ refers to the pump expelling all air in the system and
beginning to move water from its source out into the system. It does not
refer only to pouring water into the pump (although pouring water in is usu-
ally the first step).
NOTICE: NEVER run pump dry.
Running pump without water in it will
damage seals and can melt impeller and diffuser. To prevent damage,
fill
pump with water before starting.
1. Remove priming plug (Figure 9).
2. Make sure suction and discharge valves and any hoses on discharge
side of pump are open.
DISTANCE IN FEET(METERS) FROM MOTOR TO SUPPLY
0 - 50
51 - 100
101 - 200
201 - 300
Max. Load
Volts/Hz
Branch Fuse
(0 - 15)
(31 - 61)
(62 - 91)
(92 - 122)
Model
HP
Amp
Phase
Rating Amp
AWG WIRE SIZE (mm
2
)
10LTHH
1
14.8/7.4
115/230/60/1
20/15
12/14 (3/2)
12/14 (3/2)
8/14 (8.4/2)
6/14 (14/2)
15LTHH
1-1/2
20/10
115/230/60/1
25/15
10/14 (5.5/2)
10/14 (5.5/2)
8/14 (8.4/2)
6/12 (14/3)
20LTHH
2
24/12
115/230/60/1
30/15
12/14 (3/2)
10/14 (5.5/2)
6/14 (14/2)
6/12 (14/3)
25LTHH
2-1/2
26/13
115/230/60/1
30/20
12/14 (3/2)
10/14 (5.5/2)
6/14 (14/2)
4/12 (21/3)
10LTHH3
1
3.6/1.8
230/460/60/3
15/15
14/14(2/2)
14/14(2/2)
14/14(2/2)
14/14(2/2)
15LTHH3
1-1/2
4.7/2.3
230/460/60/3
15/15
14/14(2/2)
14/14(2/2)
14/14(2/2)
14/14(2/2)
20LTHH3
2
6.8/3.4
230/460/60/3
15/15
14/14(2/2)
14/14(2/2)
14/14(2/2)
14/14(2/2)
25LTHH3
2-1/2
8.5/4.25
230/460/60/3
15/15
14/14(2/2)
14/14(2/2)
14/14(2/2)
14/14(2/2)
Wiring Chart – Recommended Wire and Fuse Sizes
20
0
8
0
0
Figure 9: Remove Priming Plug and Fill
Pump Before Starting
750 0993
Figure 10: Run Ten Minutes or Less
0
1 0
80
0
Figure 11: Do Not Run Pump with
Discharge Shut-off
NOTICE:
For 575 Volt installations, consult a licensed electrician.