Goulds GGS, Installation And Operating Instructions Manual, Page: 5 / 36

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1. HANDLING
The pump should be serviced by qualified per-
sonnel only, and after having been disconnec-
ted from the power mains.
The product must be handled and lifted with care using
suitable hoisting equipment. Impacts may cause damage
without any visible external signs. See the diagrams for
hosting unpacked products (Fig.14).
2. APPLICATIONS
The pump is designed to handle clean water. The maxi-
mum tolerated quantity of sand is 25 gr/m
3
(100 gr/m
3
for
GGS pumps).
All the metal components that come into contact with the
liquid are made of stainless steel, while the plastic compo-
nents are approved for use in food preparation.
3. COUPLING THE PUMP TO THE SUBMERSIBLE MOTOR
FOR DISASSEMBLED 4” ELECTRIC PUMPS
The pump is suitable for coupling to a 4” standard NEMA
submersible motor.
For correct coupling proceed as follows (Fig.1):
Loosen the screws (2) that fasten the cable guard (1) and
detach it from the pump’s external casing (7).
Make sure the shaft, the coupling and the coupling surfa-
ces are clean.
Position the motor (3) vertically.
Couple the pump to the motor being careful to align the
cable guide hole in the lower support with motor’s cable
outlet. Then tighten the nuts (4) on the tie rods (5) that
secure the pump to the motor. Tighten in cross sequence
with a driving torque of 16-20 Nm.
Lay the motor cable (6) alongside the pump (7) and cover
it with the cable guard (1). Attach the cable guard to the
casing and secure it with the screws (2).
4. WORKING LIMITS
Maximum temperature of pumped liquid: 40°C.
Maximum immersion depth: 20 m for 5” pumps, 150 m
for 4” pumps.
Maximum number of starts per hour, evenly distributed:
4” pumps: 30, 5” pumps: 25 for motor power up to 0.9 kW,
20 for higher power.
CEI 61-69 (EN 60 335-2-41) must be observed when ope-
rating electric pumps in swimming pools or garden ponds.
5. INSTALLATION (Fig.2)
We recommend the installation of a check valve on the
delivery side to avoid water hammer.
Be careful not to damage the power cable when lowering
the pump into the well.
Tie the cable to the delivery pipe at 3-metre intervals.
5.1 Installing the electric pump in a tank or reservoir
The tank or reservoir must be large enough to prevent an
excessive number of starts per hour (see working limits).
5.2 Drop cable
If the pump is connected to a plastic delivery pipe, a steel
or nylon drop cable must be used, secured to the appro-
priate fastening hole in the head.
5.3 Well installation
Make sure the motor does not rest on the bottom of the
well and that the pump is completely submerged.
N.B. For the GSC models, leave a clearance of at least 30
cm from the bottom.
Protect the pump against dry running if there is any chan-
ce that the water level may drop.
Dry running will seriously damage the pump’s bearings
and bushing.
Never test the pump out of the water.
6. ELECTRICAL CONNECTION
6.1 Connection
Single-phase versions: see diagram in fig. (3). Use our
control panels with enclosed capacitor and switch for 5”
pumps, and our control panels with enclosed capacitor
and overload protection for 4” pumps.
Three-phase version: the internal connection of the win-
dings is set for 380-415 V at the factory (220-240 V avai-
lable on request). The pump must be connected to the
three-phase power line through a suitable control panel.
6.2 Overload protection
All the 5” single-phase pumps are equipped with a built-in
automatic reset overload protection. For the 4” pumps, the
overload protection is installed in our control panels.
All the three-phase pumps, on the other hand, require an
external protection consisting of a magneto-thermal over-
load cutout and thermal relay set to the rated current.
6.3 Checking the direction of rotation
Check the exact rotation of the three-phase pumps (only
while the pump is submerged). The correct direction is
the one that supplies the maximum head with the same
delivery.
7. SAFETY INSTRUCTIONS
Fig. 4. Pay attention to the working limits (par. 4). Impro-
per use may damage the pump and other property and
cause injury to people.
Fig. 5. The pump is not designed to handle flammable or
hazardous liquids.
Fig. 6. Make sure that the rated voltage matches the
mains voltage.
Fig. 7. The mains connection and grounding must be per-
formed by qualified personnel (certified electrician).
For connection to the mains use a multiple-pole switch
with at least 3-mm distance between the contacts
As an additional protection against lethal electric shock,
install a high sensitivity differential switch.
Fig. 8. Do not allow the pump to run dry or operate out of
the water.
Fig. 9. Do not use the power supply cable to lift or move
the pump.
Fig. 10. Sand and other solid particles must be removed
from the well.
Fig. 11. The drop cable must be of suitable length.
Fig. 12. Caution! The pump may fall down the well. Use