Electrical Connections - Granit COMFORT Premium C-85 Instrucciones De Instalación Y Mantenimiento

during the loading operation. In this case the quantity of water necessary for the loading operation will depend on the length
of the suction pipe
Installation "below head" (par. 2.1.): if there are no check valves between the water deposit and the system (or if they are
open), it loads automatically as soon as it is allowed to let out the trapped air. Then slacken the breather cap (5-fig.1)
enough to release the trapped air; this allows the system to get filled completely. Supervise the operation and close the
bleeding port as soon as the water flows out (it is advisable to provide an On/Off valve in the suction piping section and
use it to control the filling operation with the cap open). Alternatively, if an On/Off valve is present on the suction piping,
the filling operation can be carried out in a manner similar to that described for the suction lift installation.
3. COMMISSIONING
3.1

Electrical Connections

To improve immunity to the possible noise radiated towards other appliances it is recommended to use a separate electrical
duct to supply the product.
Attention: always respect the safety regulations!
Electrical installation must be carried out by an expert, authorised electrician, who takes on all responsibility.
The system must be correctly and safely earthed as required by the regulations in force.
The line voltage may change when the electropump is started. The line voltage may undergo variations
depending on other devices connected to it and on the quality of the line.
The differential circuit breaker for protection of the plant must be sized correctly according to the features shown
in Table 1. Use an F type differential circuit breaker for protection from sudden tripping. If the indications given
in the Manual are in contrast to the regulatory standards in force, take the standard as reference.
The thermal magnetic circuit breaker must be correctly sized (see
3.2 Configuration of the Integrated Inverter
The system is configured by the manufacturer to satisfy most installation cases operating at constant pressure. The main
parameters set in the factory are:

Set-Point (desired value of constant pressure); SP = 3.0 bar / 43.5 psi.

Reduction of pressure to restart RP = 0.5 bar / 7.2 psi.

Anti-cycling function: Smart.
However, these parameters and others can be set by the user according to the system. See par. 4-5 for the specifications.
For the definition of the parameters SP and RP, the pressure at which the system starts has the value:
Pstart = SP – RP For example: 3.0 – 0.5 = 2.5 bar in the default configuration.
The system will not work if the utility is at a height greater than the equivalent in water-column-metres of the Pstart (consider
1 bar - 14.5 psi = 10 m - 3.28 ft c.a.): for the default configuration, if the utility is at a height of at least 25 m ( 82 ft) above
the level of the system, the system will not start.
3.3 Priming
The priming of a pump is the phase during which the machine attempts to fill the body and the suction pipe with water. If
the operation is successful the machine can work regularly.
Once the pump has been filled (par. 2.2) and the device has been configured (par. 3.2), it is possible to connect the electric
power supply after having opened at least one utility on delivery for the first 10 seconds.
The system starts up and checks for the presence of water at the delivery.
The pump is considered as primed when a water flow is detected at the delivery. This is the typical case of positive suction
head installation (Sect.2.1). The utility open at the delivery from which the water pumped flows out can be closed. If, after
10 seconds, no regular flow is detected at the delivery, the system signals dry running (BL alarm). During the next manual
reset of the blocks ("+" and "-" keys) the priming procedure starts up (typical case of suction lift installation Sect. 2.1
The procedure makes it possible to operate for a maximum time of 5 minutes during which the safety block for dry running
is not activated. he priming time depends on various parameters, the most influential of which are the depth of the water
level from which it is drawing, the diameter of the suction pipe, the water-tightness of the suction pipe.
Except for the use of a suction duct not less than 1" and sealed airtight (there are no holes or joints through which air can
be taken in), the system is designed to be able to prime itself in water conditions up to a depth of 8m of water, in less than
5 minutes. As soon as the system detects a continuous flow at the delivery, it leaves the priming procedure and starts
working regularly., The utility open at the delivery from which the water pumped flows out can be closed. If the pump has
not yet primed after 5 minutes of the procedure, the display shows the dry running message. In this case, disconnect the
power supply, wait for 10 minutes and repeat the priming.
ENGLISH
Technical
6
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