17
Instructions for the installer
Diaphragm Gaskets
A
C
F
F
G
F
RM
3.6 -
BOILER CONNECTION
The boiler Modulex leaves the factory predisposed for the
hydraulic / gas connection and smoke outlet on the Left side
of the boiler.
For the smoke chamber fixing, use the screws and gaskets
included into the carton box,
and a 10 mm key.
The smoke collector is a standard on the left side, you can
also exit on the right side and rear side.
3.5 -
INSTALLATION
F
F
G
F
R M
A
B
When the appliance is installed on existing systems, ensure
yourself that:
- The flue outlet pipe is suitable for condensing boilers, for
the temperature of the products of combustion, calculated
and manufactured according to the regulations in force. It
must be installed as much as possible in a straight line,
tested for soundness, insulated and must not have any
occlusions or restrictions.
- The flue outlet pipe has a connection for the discharge of
condensate.
- The boiler room has a suitable outlet for the discharge of
condensate produce by the boiler.
- The electrical system has been fitted in compliance to the
specific norms and the work has been carried out by a
competent person.
- The circulation pump’s output, the head and flow direction
are suitable.
- The gas feeding supply pipe and the eventual tank are
constructed according to the regulations in force.
- The expansion vessels assure the total absorption of the
dilatation of the fluid contained in the system.
- The system has been cleaned of impurities and lime scale.
When a Modulex boiler is installed onto an existing
heating system:
In case the replacement of an existing boiler in an old system
can be programmed, it
is necessary to thoroughly clean
out the system with a basic solution. The system must be
cleaned 4 weeks before the substitution, with the system
firing at a temperature of 35°C to 40°C.
WARNING!
If it is noticed that a new Modulex has replaced,
in an old system the existing boiler without ha-
ving first performed what said in the previous pa-
ragraph, Do not wash now the system, as resi-
dual products, present in the circuit, could lead
to system gathering in the boiler body, causing
damage. UNICAL recommends contacting a spe-
cialised company for water treatment.
Instead, if installing a Modulex boiler in a new system,
it is
still recommended to thoroughly clean out the system with an
adequate product and fit a Y filter with two isolating valves
onthe boiler’s return pipe, so that, when necessary, it can be
cleaned. This filter will protect the boiler from the dirt coming
from the heating system.
When sizing pumps, it is necessary to take into consideration
the pressure losses which occurin the primary circuit.
The sealing gasket with diaphragm Ø18 (A) are fitted only in the
flow connection seat of the first and last aluminium section of
the boiler.
The sealing gasket with diaphragm Ø 27 (B) are fitted in the
other fow connection seats of the remaining aluminium sections.
In all the return connection seats of the aluminium sections,
only sealing gasket (C), without, is fitted.