Jolly Mec J20 Ficha De Montaje, Uso Y Mantenimiento página 58

Plumbing system connection
The connection of the boiler to the plumbing system must be made ONLY
by specialized personnel who are capable of carrying out installation
properly, in compliance with current standards in the country of
installation. The manufacturer will not be held responsible for damage
to persons or things in the event of failed operation if the aforementioned warning is
not complied with. It is mandatory to install an anti-condensate valve on the return of
the system, set at 60°C, if not already supplied by the manufacturer.
Closed vessel system
This product has been designed and built to
work with closed vessel systems. In general, the
closed vessel system has the following expansion
as the expansion vessel pre-loaded.
In addition to the expansion device, the closed
vessel system must be provided in accordance
with current Italian
UNI 10412-2 (2009) by:
Diagram connection boiler
WATER
RETURN
A1 A1
WATER
DELIVERY
A1 Heating water delivery 3/4 " M
A2 Heating water return 3/4 " M
B2 System fi lling water inlet 1/2 " M
C Safety valve
8
A2 A2
B 2 B 2
C C
• safety valve
• thermostat control of the circulator
• device alarm sounds
• temperature Indicator
• pressure indicator
• audio alarm
• automatic adjustment
• safety thermostat with manual reset
• circulation system
Diagram connection boiler equipped with
kit for domestic hot water production (where
indicated)
A 1 A 1
A1 Heating water delivery 3/4 " M
A2 Heating water return 3/4 " M
B1 (ove presente) sanitary hot water outlet 1/2
" M
B2 (ove presente) system and sanitary fi lling
water inlet 1/2 " M
The boiler can also be equipped with a full
kit for the production of domestic hot water.
This kit comprises:
- a plate heat exchanger
- a three-way diverter valve
- water fl ow switch
A 2 A 2
B 1 B 1
B 2 B 2
C C