Installing And Connecting The Heater-Cooker To The System; Safety Valve - Palazzetti ALBA THERMO Manuel D'installation Et D'entretien

be connected to the cooker with a pipe.
If there are other heating appliances in the same
room, the combustion air intakes must be able to
guarantee the necessary volume of air to ensure
correct operation of all the devices.
6.3 INSTALLING AND CONNECTING THE
HEATER-COOKER TO THE SYSTEM
The cooker cannot be used without water. It must be
connected to boilers which absorb at least 60% of
the total heat output.
Water loading into the machine takes place through the
open vessel.
When the open vessel has reached the
operating level, the kitchen load has been completed.
The safety valves must be installed on the connections
featured in the boiler or at the hot water outlet; in any
case, not further than 1 m from the boiler. The on-off valve
must not be installed between the safety valve and the
boiler unit.
Heating units with a higher heating power than the
heater-cooker's maximum output should not be installed
on the appliance.
The positioning and installation of the cooker must
be performed by a quali ed technician according to
the design speci cations. It must be installed in an
open tank heating system, in accordance with all
the applicable national and local standards and
regulations. One type of installation for open tank
heating systems is provided in (FIG. 6.5).
The rear connections of the appliance are provided in
gure 6.3.1.
1: Connection with G1" boiler outlet male thread
(delivery).
2: Connection with G1" boiler inlet male thread (return).
3: Connection with G ½" female thread - probe pit for
heat valve and pump thermostat.
4: Connection with G ½" female thread – position for
safety valve for maximum pressure check (overpressure).
• We recommend you install a G 1" pump with several
operating speeds in line with the heating system's actual
requirements. Immediately before and after the pump, we
recommend you install on-off valves in order to be able
to replace the pump without having to drain the entire
circuit.
• The system drain cock shall be tted in the return line,
at the lowest point in the system.
• Before commissioning the system, it should be lled
with water as follows:
For an open tank system, the same should be lled with
water until it ows out of the drain pipe connected to the
expansion tank (FIG. 6.5).
The boiler must be lled slowly, so that the air contained
in it can gradually come out.
• In the summer, the system should not be drained
because the water protects the system against corrosion.
• If the boiler is not used for a prolonged period of time
INSTALLAZIONE
004773902 - 01/2018 - PALAZZETTI - PN - Italy
and the system is lled with antifreeze solutions, the best
thing is to leave the water in the system without cutting
off any part of the system.
• If the water freezes in the boiler or if there is not
6.3.1
(Fig. 6.3.1, component 1 and 2).
The boiler lling and draining line has a diameter of 1"
and should not be reduced, at least not the rst branch of
the system. Steel pipes with a diameter of 1", or copper
pipes with an external diameter of Ø 28 mm (or larger)
may be used in this application. During installation, pay
particular attention to the tilt of the pipes, which should
be of 0.5% (5 mm per metre in length), as well as all
the components making up the heating system (boiler,
heating pipes, radiators).
Pay particular attention to the direction of rotation of the
pump.
6.3.2

Safety valve

(FIG. 6.5)
At the rear of the boiler, under the cooking plate frame,
the G ½" connection has been welded to the structure
(Fig. 6.3.1 component 4) and enables connection to the
safety valve. of 2.5 bar. It can be connected directly or
at a maximum distance of 1 m from the boiler provided
no stop valve has been installed between the boiler and
the valve.
The installation of a safety valve ensures additional
protection for the system and the boiler (in emergency
conditions)
The product guarantee is not valid if the safety valve is
not installed as speci ed above.
6.3.3 Thermometer and pressure gauge installed
Fig. 6.3.1
4
1
3
2
.
11