unicraft PG Series, Operating Instructions Manual, Page: 16 / 60

keep the fuel in a place inaccessible to children. The fuel fumes are highly infl ammable.
• Check the air fi lter: make sure that it is in good conditions and free from dust and dirt. To reach the fi lter consult the engine user’s and
maintenance manual.
ATTENTION: do not use the generator without the air fi lter: the life of the engine and the generator will be reduced!
• Activate the battery: fi ll the compartments to their maximum level with a 30/40% sulphuric acid solution and wait at least two hours
before using.
ATTENTION: do not touch the acid and do not smoke or use naked lights: battery fumes are highly infl ammable. Keep the acid
out of reach of children.
STARTING THE GENERATOR (6.1):
Before starting the engine it is necessary to:
• Ensure that no appliance is plugged into the generator.
• For the petrol engine version use the choke for cold starts.
• For generators with electrical starters turn the key to the “START” position and release it as the machine starts.
• To start the recoil operated generators, pull the cord handle until resistance is felt, then pull energetically.
ATTENTION: Do not let the recoil handle rewind quickly. Guide it to prevent damage to the automatic winder.
• When the engine is running, switch off the choke.
• At this point the unit is ready for use.
NOTE: If the generator is used at high altitudes or temperatures, the air-fuel mix ratio may be too rich; this will cause higher consumption
and lower performance. Check the effective power of the generator by means of the following correction factors:
TEMPERATURE: Power drops an average of 2% every 5 degrees centigrade above a temperature of 20 degrees centigrade.
ALTITUDE: Power drops an average of 1% every 100 meters a.s.l. Above an altitude of 2000 m, contact the service centre of the engine’s
manufacturing company to reset the combustion mixture if necessary.
USING THE GENERATOR (7.1):
NOTE: The generator, built to current standards, has been designed to satisfy a very wide range of applications.
It should be remembered when using the machine, that every application is subject to exact electrical, accident prevention and sanitary
standards; for this reason the generator should be considered as an integral part of the complete installation, and should be designed,
tested and approved by qualifi ed technicians and/or companies.
• In order to avoid electrical accidents, all connections to the distribution panel must be carried out by qualifi ed technicians. Incorrect
connections can harm people and damage the generator.
• Protection against indirect contacts: all the generators, when functioning normally, use the principal of electrical separation; however,
they can be supplied with various protection options (differentiator, isometer) by the manufacturer on specifi c request, or they can be
protected in the same way during installation by the user.
It is important therefore, to follow the instructions as below:
1) Standard generators: protected by electrical separators. This equipment has a thermic protection device and/or a magnetothermic
device to protect against a surge of current, overloading and short-circuiting.
In these cases the Generator should
under no circumstances be earthed using the terminal “PE” or with any other part of the gene-
rator.
2) Generator with optional switchboard (or with other devices installed by the user): must be protected using a circuit breaker’ which
automatically cuts off the power supply. It has heat overload protection devices and/or magnetothermic combinations with differential
circuit breakers or trip switches. In this case the generator must be connected to an earth leakage unit using the terminal “PE”, and
using as conductor a yellow - green cable of suitable size.
IMPORTANT: In the event of the user installing differential circuit breakers, it is important for its correct functioning that:
A) On single-phase generators the neutral point that corresponds to the joint of the two main coils is also earthed.
B) On three-phase generators the neutral point that corresponds to the wye-centre in the case of a wye connection is also earthed. In
the case of a delta connection it is not possible to install a differential switch.
• The generator is preset for grounding the masses; a special screw, marked with the symbol PE, allows all the metal parts of the gene-
rator set to be connected to a ground plate.
• Do not connect to the generator any appliances with unknown electrical specifi cations or with specifi cations different from those of
the generator (i.e. different voltages and/or frequencies).
• The electrical circuit of the generator is protected by a switch, which is either thermomagnetic, thermomagnetic-differential of thermic;
overloading and/or a short circuit will cut the fl ow of current immediately. To reset, disconnect all appliances, check the cause of the
short-circuit and/or overload and switch on.
• If using the generator as battery charger, place the battery at a distance of 1 m from the unit, making sure that the fi lling plugs are
removed from the cells. Take care to observe the battery polarities, incorrect connection of positive and negative poles could cause the
battery to explode.
ATTENTION: During charging, the battery gives off infl ammable vapour. Therefore observe the maximum caution during char-
ging and keep children far away.
• With a star-delta switch the following options are available:
THREE PHASE 4OO V (full design load)
SINGLE PHASE 230 V (1/3 of design load)
THREE PHASE 230V (full design load)
SINGLE PHASE 230 V (2/3 of design load)
When set on “O” all power points are disconnected.
• Before setting the switch to any of the above, ensure that no appliances are connected to the generator. Be sure to set the switch to
the correct current as shown on the tag, in order to avoid damages to the appliances.
- When the generator is in use, do not place any objects on the frame or directly on the engine: any foreign bodies may impair perfor-
mance.
• Do not hinder the normal vibrations that the generator makes when in use. The silent-blocks are of an adequate size to work properly.
10