elco R3400 Notice D'installation Et D'emploi page 23

Installation
Connecting the boiler
5
6
2
4
Gas connection (6)
The gas connection must be made by
an authorized installer in accordance
with the applicable national and local
standards and regulations.
Connect the gas line from the system
tension free to the gas connection (6) of
the boiler. A gas cock should be
mounted directly behind the boiler.
A gas filter can be mounted directly on
the gas connection of the boiler.
Flue gas connection (5)
Regulations for the construction of flue
gas systems are very different for each
country. It should be ensured that all
national regulations with regard to flue
gas systems are respected.
Connect the flue gas system to the flue
gas connection (5) of the boiler, use
fluegas systems with seamless connec-
tions only. It's not necessary to make a
separate condensate drain for the flue
gas system, as the condensate will be
drained via the syphon of the boiler.
Please note the following issues:
4

It's recommended to use stainless
steel systems

The diameter of the flue gas system
must be chosen by calculation ac-
cording to the national regulations

Construct the flue gas system as
short as possible (for maximum
length see planner documentation)

Construct horizonal ways with a mini-
mum angle of 3º
Air intake connection (3)
When using the boiler roomsealed. The
air intake can be connected if the boiler
was ordered as roomsealed. The dia-
meter should be calculated according
to the national regulations, together
with the flue gas system. The total re-
sistance of both systems should never
overcome the maximum permissible
resistance of the fan inside the boiler
(see also chapter: Technical data).
.
Electrical connection (4)
The electrical connection must be ma-
de by an authorized installer in
accordance with the applicable national
and local standards and regulations.
For the power supply it's necessary to
use a mains isolator switch with a con-
tact opening of at least 3 mm
within the boiler room. This switch can
be used to switch off the power supply
for maintenance purposes.
Cables can be inserted through the
cable trays and glands at the back of
the electrical panel at the front of the
boiler.
Connect all wires to the terminals ac-
cording to the wiring diagram of the
boiler (enclosed in map attached to
back panel of the boiler).
21