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
unexpected power application.
4. Ground the pump permanently using a wire of the same size as that
specified 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
connect 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
nameplate 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
unexpectedly, 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
usually the first step).
NOTICE: NEVER run pump dry. Running pump with out 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.
Wiring Chart – Recommended Wire and Fuse Sizes
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)
20
100
80
60
40
Figure 9: Remove Priming Plug and Fill
Pump Before Starting
Figure 10: Run Ten Minutes or Less
20
100
80
60
40
Figure 11: Do Not Run Pump with
Discharge Shut-off
NOTICE: For 575 Volt installations, consult a licensed electrician.
To Next Page
Loading...
Need help?
General
