Electrical Information; Maintenance And Service - Pentair MYERS MSP7 Owner's Manual

ELECTRICAL INFORMATION

Installation Instructions
Wiring to this pump must be installed and maintained in
accordance with the National Electric Code, state and local codes.
If more information is needed, call your local licensed electrician
or your power company.
Grounding the Motor: Permanently ground the motor in
accordance with the National Electric Code Article 250 and
applicable local codes and ordinances. It is recommended that
permanent ground connection be made to the unit using a
conductor no smaller than No. 8 AWG (8.4 mm
conductor should be connected from the accessible wire connector
on the motor to all metal parts of the swimming pool structure
and to all electrical equipment, metal conduit, and metal piping
within 5 feet (1.5 m) of the inside walls of a swimming pool, when
the motor is installed within 5 feet of the inside walls of the
swimming pool. This permanent ground should be from a metal
underground water pipe or a grounded lead in the service panel. A
metal underground water pipe or well casing at least 10 feet long
makes the best ground electrode.
If plastic pipe or insulated fittings are used, run the ground wire
directly to the ground electrode furnished by the power company.
SWIMMING POOL WIRE & FUSE SELECTION CHART
PUMP MOTOR
MODEL HP
MSP7 3/4
3/4
MSP7
MSP10 1
MSP10 1
MSP15 1-1/2
MSP15 1-1/2

MAINTENANCE AND SERVICE

Priming the Pump
To prime the pump, remove the lid from the strainer and fill the
pump and basket with water. Turn cover counterclockwise to
remove. CAUTION: Be sure pump has been shut off and pressure
relieved before removing cover.
POOL WINTERIZING
In areas where freezing temperatures occur, protect pump and
pipes from freezing. When water freezes, it expands and damages
the pump and piping.
WARNING. Do not use commonly available antifreeze solutions.
Automotive antifreeze solutions are commonly made up of
ethylene glycol, which is highly poisonous and does not evaporate.
Methyl alcohol is also highly poisonous, but will evaporate if given
enough exposure to the atmosphere. Many windshield washer
solutions are compounded with methylhydrate, which is very
poisonous. All of these above-mentioned antifreezes have a strong
deteriorating effect on some plastic materials commonly found in
pool pumps, valves, and filter components. Some plastics, such as
those used in pump impellers, will become crystalline and brittle
when in contact with antifreeze solutions or are exposed to the
fumes. Other materials, such as clear trap lids can become milky in
appearance, soften or lose rigidity when exposed to the fumes of
antifreeze compounds.
). This ground
2
NAME-
MAX. WIRE LENGTH USING AWG WIRE SIZE
PLATE
VOLTAGE AMPS
115 11.8
230 5.9
115 14.4
230 7.2
115 20.8
230 10.4
Caution: Do not ground to a gas supply line and do not connect
to an electric power supply until unit is permanently grounded.
Connect the ground wire to the approved ground and then connect
to the terminal provided.
Important: For your safety, be sure electrical circuit to pump is
shut off (disconnected) before attempting to wire pump. Pump
should be connected to a separate electrical circuit directly from
main switch. A fuse box or circuit breaker must be used in this
line (see fuse chart). Plugging into existing outlets can cause
low voltage at motor, resulting in blown fuses, tripping of motor
overload, or burned-out motor. All wiring must follow local codes.
Note: If ever in doubt, call a licensed electrician.
Motor Voltage: The pumps are wired for 230 volts, but may
be converted to 115 volts by referring to instructions printed
on motor. If motor is converted to 115 volts, have a qualified
electrician check the entire electrical and power leads system to
be sure they can handle the higher amps.
To Wire Pump: Make electrical connections with ground. First
connect bare copper ground to ground screw on back of motor.
Next make power connections.(See chart for wire size.)
14 12 10
100 160 250
400 630 990
— 128 200
300 475 660
— — 142
220 350 545
When basket and pump are filled with water, replace strainer lid.
Lubricate O-ring each time with petroleum jelly. Be sure O-ring
seal is in place before tightening cover. Turn clockwise to tighten.
The pump will now prime, with the priming time depending on the
suction lift and the horizontal distance of the suction piping.
The recommended procedures for winterizing pool piping
are as follows:
1. Use low pressure air flow to blow accumulated water from
the piping system after the water level has been pumped down
below all inlets to the pool. Drained inlet piping may be capped to
prevent re-entry of water into the pipes.
2. There is one antifreeze solution that is compatible with
plastics and is nontoxic. Preliminary investigations show that
propylenglycol is safe and effective for use in pools and all types
of fresh water piping systems for winterizing, including solar
systems, and has a very low evaporation rate.
A solution of 40% propylenglycol and 60% water will protect pipes
from bursting to –50° F. A unique property of propylenglycol is that
it contracts as it approaches its freezing point, counteracting the
expansion characteristics of water and preventing bursting of pipes.
5
FUSE OR
CIRCUIT
BREAKER
8 6
385 600
1545 2405
310 485
1030 1650
222 345
860 1325
15
10
20
10
25
15