INSTRUCTIONS FOR THE USER
3. APPLICATION
The boiler is designed to comply with the following European
Directives:
90/396 CEE -Directive concerning gas-fired appliances;
92/42 CEE -Directive concerning boiler efficiency;
73/23 CEE -Directive concerning low voltage appliances;
89/336 CEE -Directive concerning magnetic compatibility.
The boiler is designed only for the production of hot water up to
90°C used for heating purposes. So it is equipped with a two-
stage thermostat with a minimum setting of 43±3°C and a
maximum setting of 82±3°C.
The features of the boiler and the serial number for identification
purposes are shown on the rating plate, which the installer must
fix onto the right hand side of the jacket.
(See Section «2 -GENERAL DESCRIPTION»).
4. FUEL AND BURNER
(fig. 2)
Diesel fuel with a max viscosity of 1.4°E at 20°C (NHV 10210
kCal/ kg) or natural gas (NHV 8570 kCal/Nm
3
) can be used.
The burners are the injection type with maximum head projection
as shown in fig.2.
The choice of burner depends on the capacity of the boiler and
furnace pressure, as shown in the specification.
5. PROPERTIES
OF THE WATER
The chemical and physical properties of the water in the circuit
and top-up water are fundamental factors affecting safety of the
system and correct operation of the boiler.
Poor quality water is known to cause problems for the entire
system, the most serious and most frequent one being the
formation of scale on the heat exchanging surfaces.
Due to their low heat conductivity, even thin scale deposits
insulate the walls, which are not cooled by the circulating water
and cause irregular expansion or localised thermal shock.
Hence it is advisable to get in touch with a company specialised
in water treatment for the development of automatic treatment
and control system.
Water treatment is necessary when:
a) the installations are very large;
b) only very hard water is available;
c) for any reason the system has to be emptied partially or fully
and then needs to be filled again.
Properties of the filling and topping-up water are as follows:
- Appearance:…………………………….clear
-
Total hardness:…………………………max. 20°F
-
Free oxygen:…………………………….max. 0,005 mg/l
-
Organic substances:……………………max. 0,5 mg/l
-
pH:………………………………………..min. 8,5
6. CONTROL
PANEL
(fig. 3)
The pre-wired control panel comes with the following:
•
ON-OFF switch (51);
•
Heating temperature regulation thermostat (50);
•
Safety thermostat with manual reset (52);
•
Heating water thermometer (47).
7.
HOW TO OPERATE THE
BOILER
(figs. 3-4)
Starting up
•
Check the pressure on the gauge on the boiler (max 5 bar).
•
Turn the switch (51) to position
I.
•
Set the boiler thermostat (50) to the required temperature.
•
Read the boiler water temperature on the thermometer (47).
•
Check operation of the circulation pump.
Switching off
•
Turn the boiler thermostat (50) fully anti-clockwise.
•
Allow the boiler to cool down to 50 ± 60°C.
•
Turn the switch (51) to position
O
to power off the boiler.
Emptying
•
If the boiler is not going to be used for a long time and the
temperature is low or anti-freeze has not been added, empty
the system via the cock (16) which is accessible after
removing the upper (43) and lower (42) panels on the front
of the jacket.
Overheating
•
If the boiler exceeds 100°C, the safety thermostat (52) turns
off the burner.
•
Unscrew the cap of the safety thermostat (52) and press the
reset button. If the inconvenience occurs again, call in a
qualified person to make the necessary repairs.
8. MAINTENANCE AND CLEANING
(figs. 4)
Once a year at the end of the season, call in a qualified person
to service and clean the boiler.
However, it will be necessary to clean the boiler whenever
alterations in the fuel cause the formation of layers of soot on
the heat exchanging surfaces. To clean the boiler, power off
from the control panel, open the burner door (18) and the upper
door (20). For boilers with 6 and 7 elements, remove the
turbofans (27) from the smoke tubes. Remove all soot from the
horizontal and vertical pipes using a metal brush and suction
device.
Alternatively, specific chemical products can be used provided
that the instructions on the pack are followed correctly.
After cleaning, place the doors back in position carefully,
checking the gaskets (35, 36) and insulating panels (17, 22).
Check the seal of the burner door and replace the seals if in
doubt.
NOTE.
Cleaning kits are available on request.
Содержание GIEGA NTG 114
Страница 1: ...GIEGA NTG 82 220 kW GAS OR OIL BOILER INSTALLATION AND MAINTENANCE HANDBOOK 1312 1312AS2413 711292...
Страница 3: ...1 7 6 2 3 4 5 6 7 2 3 10 8 5 4 9 Fig 5 Fig 6 Fig 8 Fig 7 Fig 9...
Страница 4: ...58 57 24 25 26 63 10 Fig 10 Fig 11 Fig 12 Fig 13...
Страница 5: ...40 55 65 24 25 40 55 65 63 45 46 44 65 56 65 Fig 14 Fig 18 Fig 17 Fig 16 Fig 15...
Страница 6: ...43 42 37 38 Fig 19 Fig 23 Fig 22 Fig 21 Fig 20...
Страница 14: ...GIEGA NTG 82 220 kW MANTEMENIOI 1312 1312AS2413...
Страница 15: ...1 2 1 3 4 5 1 31 20 31 B EN 303 MANUFACTURER SERIAL NUMBER MODEL POWER...
Страница 19: ...16 17 18 fig 3 5 R 51 50...
