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GQ, GX, GM Rev. 5 - Operating Instructions
GB
6.6. Transportable installation
To avoid early deterioration of the pump when used
in stagnant water or in rivers, mount on a flat surface
raised from the ground so that sand or grit is not lif-
ted.
When a plastic delivery pipe or flexible hose is used,
a rope is required for lowering, securing and lifting
the pump.
A
safety rope or chain
of non-perishable material
should always be used to secure the pump.
Never use the electric power cable to
suspend the pump.
In order to avoid the risk of mechanical or
electrical injury all portable pumps should be
securely isolated from electrical power supply
prior to their relocation.
Attach the power supply cable to the delivery pipe or
to the safety rope with cable clamps. The power
cable should not be taut: allow for a certain degree of
slackness to avoid the risk of strain caused by
expansion of the pipe during operation.
6.7. Fixed installation with automatic coupling
feet and guide rails
GMC 50-65, GMV 50-65, GQV
The automatic coupling system allows for quick and
efficient inspection operations.
The coupling foot is fastened to the bottom of the
sump together with the delivery pipe; two guiding
tubes connect it to the anchoring bracket secured to
the edge of the sump cover.
The pump is lowered along the guiding tubes until it
reaches the exact coupling position; the seal will be
tight thanks to the weight of the pump.
This operation can be repeated any number of times
and it makes checking and inspection operations
easier; the pump is simply extracted from the sump
by means of a chain (even if the system is flooded).
6.8 Electrical connection
Electrical connection must be carried out only
by a qualified electrician in accordance with
local regulations.
Follow all safety standards.
The unit must be always earthed, also with a non-
metallic delivery pipe.
Make sure the frequency and mains voltage correspond
with the name plate data.
For use in swimming pools (not when persons are in
the pool), garden ponds and similar places, a residual
current device with I∆N not exceeding 30 mA must be
installed in the supply circuit.
Install a device for disconnection from the mains
(switch) with a contact separation of at least 3 mm on
all poles.
When extension cables are used, make sure the cable
wires are of adequate size to avoid voltage drops and
that the connection stays dry.
6.8.1. Single-phase pumps
Supplied with incorporated capacitor and thermal
protector, with power cable type H07 RN8-F, with
plug and float switch.
Connect the plug to a socket with an earth lead.
Electrical diagram (paragraph 12.2 Annexes).
6.8.2. GQG single-phase pumps
Supplied with control box with an overload-protective
device and with starting capacitors. Power cable
type H07 RN8-F, without plug and with float switch.
Electrical diagram (paragraph 12.2 Annexes) (see
the diagram into the control box).
6.8.3. Three-phase pumps
GQR, GQN, GQS, GQV, GXC, GXV, GQG
Cable without plug
.
Install in the control box an overload-protective device
with curve D in accordance with the name-plate current.
With three-phase pumps, when the water level is not
under direct visible control, install a float switch connec-
ted to the control box and to set the water levels to stop
and automatically start the pump.
6.8.4. Three-phase pumps GMC, GMV
Cable without plug
.
Install in the control box an overload-protective device
with curve D in accordance with the name-plate current.
Fitted with 2 thermal protectors which are connected in
series and inserted between two different phases. The
thermal protectors, in the three-phase motors, provide
protection against overloading and not against operation
with a blocked rotor.
The control box must therefore also be fitted with a
suitable hot-wire ammeter relay cuopled with the
control contactor.
Electrical diagram (paragraph 12.2 Annexes).
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