Recirculation Pump (Fig. 6); Adjusting The Door (Fig. 7); Assembly Of The Burner (Fig. 8); Connecting The Cooling Tube To The Flame Inspection Window (Fig. 9) - Lamborghini Caloreclima MEGAPREX N 720N Instrucciones Para El Uso, La Instalación Y El Montaje

MEGAPREX N 720N ÷ 1060N
this calculation).
The expansion pipe connects the expansion vessel to the system. This pipe will start at the T3 fitting (see the Dimensions table), and must not
be fitted with on-off valves. At fitting T3, or within 0.5 m of the first flange on the outlet pipe, install a safety valve suitable for the capacity of the
boiler and in compliance with current local standards. No type of shut-off device may be installed between the boiler and the safety valves, and
these valves should be set to operate when the maximum permitted operating pressure is exceeded.

5.5.5 Recirculation pump (Fig. 6)

Condensation of the water vapor contained in the flue gas leaving the boiler (condensate) occurs when the return water temperature is below
50ºC. This is significant, particularly when the boiler is turned on in the morning after being off all night. Condensate is acidic and corrosive, and
will damage the metal plating on the boiler over time. It is therefore advisable to install a recirculation pump with an anti-condensation feature,
to be fitted between the feed and return fittings, upstream of any mixing valve. While the system is operating, the pump must ensure a flow-rate
of 20 to 30% of the total. The (anti-condensation) recirculation pump is controlled using the Low-Temperature Thermostat Panel (optional). The
bulb for the corresponding thermostat must be fitted at the return (using a sheath that must be added by the installer of that pipe).

5.6 Adjusting the door (Fig. 7)

On all pressurized boilers, it's possible to adjust and reverse the side where the door opens.
Opening
To set the side of the door, simply tighten lock nuts 2 and 4 against nuts 1 and 3.
To reverse the side where the door opens, tighten lock nuts 2 and 4 on the opposite side.
Closing
Loosen lock nuts 2 and 4, tighten nuts 1 and 3 as needed, and retighten lock nuts 2 and 4.
Positioning
After installing the burner, the door must be positioned. This can be done by loosening nuts 1 and 3 and set screw 5, and using nut 6 to adjust the
height. This must be done so that the entire rope seal presses against the plate, by tightening nuts 1 and 3.

5.7 Assembly of the burner (Fig. 8)

The assembly of the burner at the boiler door must ensure perfect tightness for the products of combustion. Once the burner is installed on the
boiler, the space between the burner nozzle and the refractory material on the door must be filled with the ceramic fiber padding (A) provided.
This prevents the door from overheating, which would result in irreversible warping. The fuel connections to the burner must be placed so that
the boiler door can open completely with the burner installed.
It is advisable to place a rigid supporting base under the burner to prevent its full weight from negatively affecting the door.
RSW
720-1060 N

5.8 Connecting the cooling tube to the flame inspection window (Fig. 9)

The flame inspection window is equipped with a pressure fitting (1). Once the interior screw is loosened, it must be connected to outlet 2 on the
burner using a silicone hose or copper pipe. This allows the air blown back by the fan to cool the glass on the window and prevent it from turning
black. Failure to connect the hose or pipe to the window can cause the glass to break.
When disassembling the window for cleaning, check the condition of the seals, replacing them if necessary. After closing, verify tightness.
5.9 Assembling the panels, mod. 720÷1060. Sequence (Fig. 10)
a) Carefully position the side panels (pos. 1, 2 - 3 and 4), hooking them onto the supports on the boiler.
b) Assemble the U (pos. 12).
c) Attach the control panel to the top front panel (pos. 5).
d) Rest the top panel (pos. 5), which includes the control panel, against the side panel (pos. 1), which includes springs, closing pins and nuts
(pos. 9-10-11).
e) Insert the instrument bulbs in the sheaths (pos. 13) and make the electrical connection from the control panel to the mains, burner, any
pumps, etc. It is advisable to insert the probes fully into the sheaths to improve contact. Then secure the capillary tubes with the springs. Close
the cover on the electrical panel and pass the burner plug through the openings on the previous plate (pos. 14).
f) Install the top panels (pos. 6-7-8), hooking them onto the side panels (pos. 2-3-4), which include springs, closing pins and nuts (pos. 9-10-11).
g) Attach the front panel (pos. 15) to the front door using the screws (pos. 16) and nuts (pos. 17). The panel must be fitted before installing the
burner.
L min. (mm) L max. (mm)
320 390
cod. 3541O220 - Rev. 00 - 03/2018
S
239
IT
47