11
ENGLISH
make sure that the swivel (nut)
on the two boiler stove outlet
pipes is closed
The product looks like the image below without any
kits.
WateR ciRcUit installation
PlUMbing
The products are equipped with closed expansion
tanks.
if the expansion tank is built into the
product, this does not ensure proper
protection against thermal expansion
caused by water in the entire system.
therefore, installers should assess whether
an additional expansion tank is needed,
depending on the type of system.
ALL OTHER HYDRAULIC COMPONENTS MAY BE
INSTALLED WITHIN THE Boiler stove BY PURCHASING
A KIT OR IF PREPARED BY THE INSTALLER.
Plumbing depends on the type of system.
However, there are some “general rules”:
• The hydraulic system must operate at a pressure
between 1 and 1.5-2 bars at running temperature
(hot) in a closed vessel circuit.
• N.B.: The boiler stove SHOULD NOT be installed
in place of, for example, an open vessel installed
kitchen range without adjusting the expansion
system to closed vessel.
• The presence of an accumulator (tank) is
recommended but not mandatory. Its advantage
is that it releases the boiler stove from “sudden”
requests from the system and can be integrated
with other heat sources. It reduces fuel consumption
and increases the efficiency of the system. A puffer
of at least 20 l/kW is recommended.
• The return temperature of water to the boiler stove
must be higher than 50-55° C to prevent the forming
of condensation.
• An accumulator (tank) is needed to heat low-
temperature radiant panels and must be installed
according to the panel manufacturer’s instructions.
• The material used in the circuit must be suitable to
withstand overheating.
• The installer must determine whether or not to use
conditioned products. In Italy, refer to UNI 8065-1989
(Water treatment in heating systems for civil use).
• Direct plumbing to the radiators prevents proper
operation, owing to the small diameter of their pipes.
vent
During normal operation the stove is
vented automatically. The need for manual
venting can only be assessed at initial
start-up by the technician
installeR
®
swivel
We offer four internal kits (optional)
PiPe Kits
comprised of delivery and return pipe in the event that
the other components are installed externally (pump,
etc.).
Kit R
(for Layma Idro)
for installation without instant DHW production.
Kit R2
(for Layma Idro)
For installation without instant DHW production with
system separator.
Kit RW
(for Layma Idro 22)
for installation with instant DHW production Suggested
for 22 kW models only.
PRessURe gaUge
The boiler stoves have an electronic water pressure
gauge. There are no analogue pressure gauges. The
water pressure is shown on the display, (M7) as shown
in the diagram. An analogue pressure gauges can be
fitted as an optional extra.
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