LAMBORGHINI MEGAPREX N 92, Техническое руководство - Установка - Использование и обслуживание

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5.5.5 Recirculating pump (Fig. 8)
The condensation of the water vapour contained
in the flue gas leaving the boiler (condensate)
occurs when the return water temperature is
less than 55°C and is significant above all when
starting in the morning, after the boiler has been
off all night. This condensate is acidic and corro-
sive and, over time, attacks the metal plate on
the boiler. Consequently, a recirculating pump
with the function of preventing condensate
should be installed between the outlet and
return fittings, upstream of any mixing valve.
The pump must ensure, when the system is
operating, a flow-rate of between 20 and 30% of
the total; it must also ensure a return water tem-
perature no less than 55°C, while the required
discharge head is quite low, as it only needs to
overcome the resistance of the boiler and the
valves. To measure the effective central heating
return inlet temperature for the purpose of con-
trolling the condensate prevention pump or
managing the functions for getting the system to
stable temperature operation, a probe socket
must be fitted at a distance equivalent to 3-5
times the diameter of the return pipe upstream
of the water coupling.
5.6 Opening and adjusting the front door
For models 92-1890 the door is hin-
ged, fastened and reversed as regards the
direction of opening as shown in Fig. 9.
The following operations are required:
- The door is supplied with four equal brackets
(pos. 3) and hinges.
- To establish the direction of opening, RIGHT
or LEFT, unscrew the nut (pos. 7), unscrew
and remove the R or L nut (pos. 6), depen-
ding on which side the door opens from.
- Height adjustment of the door is performed
using the nut (pos. 2); after having completed
the adjustments tighten the dowels (pos. 1).
- Longitudinal adjustment is performed using
the screw (pos. 8).
Key (Fig. 9)
1 Fastening dowel
2 Door support/adjustment nut
3 Hinge bracket
4 Hinge pin
5 Hinge screw
6 Hinge fastening nut
7 Fastening nut
8 Hinge bracket fastening/adjustment screws
and nuts
For
models
2360-6000 the door is hinged,
fastened and reversed as regards the direction
of opening as shown in Fig. 10.
The following operations are required:
- The door is supplied with four equal hinges
(pos. 3).
- To establish the direction of opening, RIGHT
or LEFT unscrew the nut (pos. 7), unscrew
and remove the R or L nut (pos. 6), depen-
ding on which side the door opens from.
- Height adjustment of the door is performed
using the nut (pos. 2); after having completed
the adjustments tighten the dowels (pos. 1).
Key (Fig. 10)
1 Fastening dowel
2 Door support/adjustment nut
3 Hinge bracket
4 Hinge pin
5 Hinge screw
6 Hinge fastening nut
7 Fastening nut
5.7 Assembling the burner (Fig. 11)
The assembly of the burner to the door of the
boiler must ensure perfect tightness to the pro-
ducts of combustion.
Once having installed the burner on the boiler,
the space between the burner draught tube and
the refractory material on the door must be filled
with the layer of ceramic fibre (A) supplied.
This prevents the door from overheating and
consequently from being irreversibly deformed.
The fuel connections to the burner must be loca-
ted so as to allow the complete opening of the
boiler door with the burner installed.
M. PREX N L min. (mm) L max. (mm)
92-152 230 300
190-399 250 320
525-600 290 360
720-940 320 390
1060-1250 320 390
1480-1890 350 420
2360 350 420
3000-3600 370 450
4000-4500 450 500
5000 500 550
6000 500 550
5.8 Connecting the flame inspection window
(Fig. 12)
The flame inspection window features a pressu-
re fitting (1) to be connected via a silicone hose
or copper pipe to the outlet on the burner (2).
This operation allows the air blown by the fan to
cool the glass and prevent it from turning black.
Failure to connect the hose or pipe to the win-
dow may cause the glass to break.
5.9 Assembling the panels, models 92÷399
Assembly sequence (Fig. 13)
a) Position the right and left side panels (pos. 1-
2) hooking them to the support (pos. 13).
To know which of the two sides is the right or
the left, refer to the hole for the cable gland
plate (pos. 6), which must be facing the front
of the boiler.
b) Fasten the control panel to the top panel
(pos. 3).
c) Rest the top right panel (pos. 3), complete
with the control panel, to the side panel (pos.
1) complete with springs, closing pins and
nuts (pos. 10-11-12).
d) Insert the bulbs of the instruments into the
sheaths as shown in Fig. 20 and make the
electrical connection between the control
panel and the power line, burner and any
pumps etc. The probes should be inserted
fully into the corresponding sockets, to impro-
ve contact. Then secure the capillary tubes
with the springs. Close the cover on the elec-
trical panel, pass the burner plug through the
side plate (pos. 6) and secure the cable with
the cable gland supplied. Fasten the plate
(pos. 6) with the screws (pos. 7).
e) Fit the panel left top (pos. 4) to the left side
panel (pos. 2) complete with springs, closing
pins and nuts (pos. 10-11-12).
f) Insert the bulbs of the instruments into the
sheaths as shown in Fig. 13-20 and make the
electrical connection between the control
panel and the power line, burner and any
pumps etc. The probes should be inserted
fully into the corresponding sockets, to impro-
ve contact. Then secure the capillary tubes
with the springs. Close the cover on the elec-
trical panel, pass the burner plug through the
side plate (pos. 9) and secure the cable with
the cable gland supplied. Fasten the plates
(pos. 9) with the screws (pos. 10).
g) Fit the top panel (pos. 6) to the side panel
(pos. 3) complete with springs, closing pins
and nuts (pos.14-15-16).
h) Fit the rear panel (pos. 8) to the boiler using the
screws (pos. 13) and the nuts (pos. 14).
i) Fit the front panel (pos. 5) to the door using
the screws (pos. 8) and the nuts (pos. 9).
l) Fasten the rating label to the boiler, see
Chap. 1, after having cleaned and degreased
the part in question using a suitable solvent,
and apply it so as to ensure perfect adhesion.
Do not remove the rating label, as it will lose
its adhesiveness.
The rating label is included in the document
envelope.
5.10 Assembling the panels, models 525÷1890
Assembly sequence (Fig. 14)
a) Position the side panels (pos. 1-2 and 3-4)
hooking them to the supports (pos. 19).
b) Position the top right panel (pos. 5-6) and
then the left panel (7-8) hooking them to the
supports on the boiler (pos. 19) and to the
crossbeam (pos. 18).
c) Fasten the control panel to the top right panel
(pos. 5).
d) Rest the top panel (pos. 5), complete with the
control panel, to the side panel (pos. 1) com-
plete with springs, closing pins and nuts (pos.
15-16-17).
e) Insert the bulbs of the instruments into the sheats
as shown in Fig. 21 and make the electrical
connection between the control panel and the
power line, burner and any pumps etc. The pro-
bes should be inserted fully into the correspon-
ding sockets, to improve contact. Then secure
the capillary tubes with the springs. Close the
cover on the electrical panel, pass the burner
plug through the side plate (pos. 11) and secure
the cable with the cable gland supplied. Fasten
the plate (pos. 11) with the screws (pos. 12).
f) Fit the support (pos. 18).
g) Fit the top panels (pos. 5-6-7-8) hooking them
to the side panels (pos. 1-2-3-4) complete
with springs, closing pins and nuts (15-16-17).
h) Fit the front panels (pos. 9-10) to the front
door using the screws (pos. 14) and the nuts
(pos. 13).
i) Fasten the rating label to the boiler, see
Chap. 1, after having cleaned and degreased
the part in question using a suitable solvent,
and apply it so as to ensure perfect adhesion.
Do not remove the rating label, as it will lose
its adhesiveness.
The rating label is included in the document
envelope.
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