deville LOGICA BT Serie Manuel D'entretien page 13

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
90ëC used for heating purposes. The boiler is integrated with a hot
water heater.
The features of the boiler and the serial number for identification
purposes are shown on the rating plate, fixed onto the right hand
side of the jacket.
(See Section «2 - GENERAL DESCRIPTION»).
4 FUEL AND BURNER
.
Diesel fuel with a max viscosity of 1.4ë E at 20ëC (NHV 10210 kCal/
kg) or natural gas (NHV 8570 kCal/Nm
The burners are the blown air type and must have a sleeve that is
slightly longer than the insulation thickness so that the head projects
as shown in figure 1.
The choice of burner depends on the capacity of the boiler and the
load losses on the flue gas exhaust side, as shown in the table of
specifications.
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.
So it is necessary to use suitable treated water if the hardness is
over 20-25 ëF.
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.
6 CONTROL PANEL
.
The pre-wired control panel comes with the following:
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. Four-position control (67) (
. Power on light (70);
. Heating temperature regulation thermostat (66);
. Safety thermostat with manual reset (68);
. Heating water thermometer (72).
. Hot water temperature regulation thermostat (65);
. Hot water thermometer (72).
OPERATING PRINCIPLE
The burner produces the necessary calories depending on the
setting of the regulation thermostat (65 and 66) to keep the water in
the heating circuit leaving the boiler at the set temperature.
INSTRUCTIONS FOR THE USER
(Fig. 1)
3
) can be used.
(Fig. 2)
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- - Summer - Winter
7 HOW TO OPERATE THE BOILER
.
(Fig. 2)
Starting up:
. Check the pressure on the gauge on the boiler (max 4 bar).
. Open all the valves and/or gates in the heating and fuel supply
system.
. Turn the control (67) to position
. Set the boiler thermostat (66) to the required temperature.
. Set the water heater thermostat (65) to the required temperature.
. Read the temperature on the thermometers (72).
NOTES
The temperature of the water in the heating circuit can be set from
30ëC to 90ëC.
The temperature of the water heater can be set from 30ëC to 60ëC.
When the boiler is in operation, the production of hot water always
takes precedence.
If the water heater thermostat calls for heat, the burner and charge
pump of the water heater will start up.
When the water heater requirements have been met, the charge
pump stops and the heating system pump starts up.
If the heating system calls for heat, the burner will also be in
operation.
During the production of hot water, the temperature of the boiler is
regulated by the thermostat (69) which is set to 85ëC. The boiler
thermostat is not in operation but still controlled by the safety
thermostat.
Switching off
. Turn the boiler thermostat (66) fully anti-clockwise.
. Turn the thermostat of the water heater (65) fully anti-clockwise.
. Allow the boiler to cool down to 50-60ëC.
. Turn the control (67) to position
Summer/Winter settings
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Pos. = OFF
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Pos. = ACTIVATES HOT WATER SUPPLY ONLY -
HEATING OFF
Pos. = ACTIVATES BOTH HEATING AND
HOT WATER SUPPLY
HEATING FUNCTION WITH ROOM THERMOSTAT
Pump and burner operating only on heat request.
Burner is controlled by boiler thermostats (TR,TS,TF) as well.
If ambient thermostat is not under request, both pump and burner
will be idle.
);
HEATING FUNCTION WITHOUT ROOM THERMOSTAT
Pump is always running and burner is controlled by boiler
thermostats (TR,TS,TF).
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 (C - Fig. 4) which is accessible after removing
the front panel (33 - Fig. 12 or 55 - Fig. 14) of the jacket.
Overheating
. If the boiler exceeds 100ëC, the safety thermostat (68) turns off the
burner.
. Unscrew the cap of the safety thermostat (68) and press the reset
button. If the inconvenience occurs again, call in a qualified
person to make the necessary repairs.
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(light 70 on).
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(light off) to power off the boiler.