LIBRETTO LGC3 Manual De Instrucciones página 16

11 CONTENTS OF PACKAGES
.
SUPPLIED
The following parts are supplied:
. Boiler body - mounted, tested and complete with doors and acces-
sories.
. Jacket and insulation.
. Control panel.
12 INSTALLATION
.
The boiler must be installed by a properly qualified person. It must
be installed in a room of a suitable size in compliance with the rele-
vant safety rules.
The plumbing system must ensure a minimum flow of water into the
boiler as shown in the specification.
Figure 5 shows two examples of plumbing system layout. If a sealed
expansion tank is used, a safety valve must be fitted.
Always remember to comply with any local rules on the safety of
heating systems.
LEGEND
1 - Open expansion tank
2 - Pump
3 - One-way valve
4 - Re-circulation pump
5 - Return
6 - Delivery
7 - Heating shell
8 - Sealed expansion tank
9 - Filling valve
10 - Safety valve
13 HOW TO INSTALL THE BOILER
.
The boiler is installed in separate stages:
1 - Plumbing connections and hydraulic test.
2 - Assembly of the jacket.
3 - Installation of the control panel.
13.1 - PLUMBING CONNECTIONS AND HYDRAULIC
TEST (Figs. 6-9)
Always clean the system completely before making the plumbing
connections.
What to do after positioning the boiler:
1 - Fit the insulating panel (37) onto the rear element (1), centring
the holes in the tie-rods (3).
2 - Mount a 1/2" cock (C) to drain the boiler.
3 - Connect the delivery and return pipes using 1" 1/4 the threaded
fittings on the rear elements for the heating circuit.
4 - Fill the boiler slowly and relieve it entirely of air. Charge the sys-
tem until the pressure is at least 1 bar.
CAUTION! The maximum working pressure is 4 bar.
(Fig. 5)
13.2 - JACKET ASSEMBLY (Figs. 7-8-9 and 10)
1 - Mount the brackets (22) on the front element (21) and lock them
with M8x35 screws (9), nuts (24) and washers (8).
2 - Screw the 3.9 x 9.5 self-tapping screws (32) partially into the top
holes in the brackets (22).
3 - Tighten the nuts (2) fully by hand on the rear tie-rods (3).
4 - Cover the boiler shell with layers of insulation (38) making sure
the bottom one is centred and adheres properly.
5 - Mount the side panels (31, 34) of the jacket, centring the rear
holes in the tie-rods (3) and the front slots in the screws (32)
mounted in step 2.
6 - Lock the side panels onto the brackets (22) using the screws
(32).
7 - Unscrew the nuts (2) tightened in step 3 until they comee up
against the side panels (31, 34). Lock the side panels with
the other nuts (2).
8 - Fit the rear upper (56) and lower (57) panels at the back of the
right (31) and left (34) sides.
NOTE. For other parts see paragraph 13.3.
13.3 - CONTROL PANEL INSTALLATION (Figs. 11-12)
CAUTION! 1 - The description below applies to heating boilers only.
If there is also a water heater, it is necessary to mount
the kit shown in fig. 13, following the instructions in
paragraph 13.4.
2 - The instructions in the paragraph below are for me-
chanical assembly operations and layout of the con-
trol panel. For wiring connections refer to paragraph
14.
1 - Remove the top cover (43) from the control panel.
2 - Secure the control panel (51) onto the sides (31, 34) using the
four front screws (52) and two top screws (36).
3 - Unwind the capillaries of the thermostats (44, 46) and the ther-
mometer (49). Insert the probes in the sheath (19) and tighten
them with the probe retaining spring.
CAUTION! When unwinding the capillaries, be very careful not
to create sharp bends or twists.
4 - Mount the instrument panel (40) on the control panel using the
four 4.2x13 screws (53) and the four clips (55).
5 - Mount the safety guard (39).
6 - Connect the cables of the circulation pump, burner and power
supply, insert them in the wire leads and lock them in position.
Refer to paragraph 14. WIRING for further details.
CAUTION! Connect all earthing cables to the screw (54).
7 - Mount the cover (43) on the control panel (51). Lastly, mount
the top panel (35) and the front panel (33) in that order.
8 - Stick the rating plate and wiring layout on to the right-hand side
(31) of the jacket. The trademark must be fitted into its slot on
the front panel (33).
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