Fischer Panda AGT 6000 PVMV-N, Руководство пользователя

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Installation Instructions
AGT 6000 PVMV-N 12V_24V - Chapter B: Installation Instructions Page 57
ATTENTION! Temperature restriction!
This pump may only be used if it is ensured that the temperature of the coolant entering the pump
does not exceed 70°C during continual duty. 75°C is permissible for short periods. These may,
however, in no case be for longer periods. If the coolant temperature exceeds the permissible
rate, this can lead to the impeller blades being torn off.The advantage of this impeller pump is that
this pump, as a "positive displacement pump", is self-suctioning and is therefore very sensitive to
air bubbles etc.
Ventilating the cooling system with the aid of a self suction impeller pump is very simple. In some
cases the pump is additionally installed for this reason alone. Unfortunately the operating noise of
these pumps is very loud.
In spite of this attention must be paid that a zone is available at a high point, where the air
bubbles in the coolant are able to escape to. As a rule, this is the expansion tank, as long as this
is connected direct to the tank. If the coolant expansion tank is, however, so integrated in the
system that it cannot be reached by circulating water, then an air release valve must be fitted in
the circulation pipe at a place of your own choice, which can then also be connected to the
expansion tank (see next page).
In case of doubt, you should send a diagram of the required coolant system to Fischer Panda and
let this be checked there.
Installation with special air separator
An "air separator" must be fitted at all critical places in the circulation system, in case a perfect
automatic ventilation on account of obstacles in the pipe passage cannot be achieved. A self-
actuating ventilation valve must be fitted to each air separator.
Monitoring the Temperature
You are expressively advised to measure the temperature of the circulating coolant after installa-
tion. Two remote thermometers must be used for this. A connection must be fitted to the motor
coolant inlet; the second on the coolant outlet. After a short warming-up period, the generator
must have a load of at least 75% of the nominal capacity placed on it. The coolant circulating is to
be checked. The values must lie within the following limits:
1. Coolant inlet, max 70°C during constant duty at m aximum load
2. Coolant outlet, max 85°C during constant duty
3. Difference of both values: This point is especially important and gives an indication of the coo-
lant circulating. The difference should amount to a maximum of 17°C for a water-cooled
system with an integrated water-cooled pre-silencer, as a rule it should, however, lie between
10 - 12°C.
The circulating coolant is not sufficient, if the difference amounts to more than 15°C, and the
amount of water circulating must be increased. This can be solved, for example, if the pipe pas-
sage is improved or the pulley diameter is reduced. It is absolutely essential to measure the per-
formance of the cooling system after installation of the generator. The above named values
should be considered as the maximum permissible values. They are also valid for operation at
high temperatures. During constant duty at normal temperatures (20°C), the values should be
well below the above named data.