4.1.6 WATER SIDE CONNECTION INSTRUCTIONS
The heating capacity of the unit must be previously established
current regulations. The system must be provided with all the
components for correct and regular operation. In particular,
provide for all the protection and safety devices prescribed by
current regulations for the complete system.
We strongly recommend to install two ball valves
under the boiler, so the boiler can be isolated from
the heating system when needed.
4.1.7 EXPANSION VESSEL
W
therefore its connection must be carried out by the qualified
installer. The capacity of the expansion vessel must be chosen
and installed to match the capacity of the central heating
system and the static pressure. We suggest you install the
expansion vessel in the return line of the central heating
system. It can be combined with the drain valve for servicing.
4.1.8 SAFETY VALVE
Safety valve outlet must be connected to collection pipe to
prevent water spurting onto the floor in case of overpressure
in the heating circuit. Otherwise, if the discharge valve cuts in
and floods the room, the boiler manufacturer cannot be held
liable.
4.1.9 CONDENSATE DISCHARGE
The condensate drain is in the left side at the bottom of the
boiler and has a 25mm hose discharge. Connect this flexible
condensate drain. Metal lines are not allowed. Blockage of this
drain may cause damage to the boiler. The drain connection is
correct when the condensate can be seen flowing away, e.g.
using a funnel. Any damage that may occur is not covered by
the warranty of the boiler. There should be an open connection
between the condensate hose from the boiler, to the sewage
system. An under pressure in the sewage system should never
be able to suck on the boiler condensate drain hose. The
condensate drain must be connected in accordance with
current regulations.
Do not use the water system pipes to earth electrical
appliances.
4.1.10 FROST PROTECTION
Wallcon series boiler has built-in frost protection, automatically
activating the central heating pump when the boiler return
will shut down as soon as the return temperature has reached
demanded point. The above-mentioned temperatures relates
boiler. This Frost Protection provision is for the boiler only and
not for the all system.
4.1.11 DIRT SEPERATION
the return of the boiler is such a way that the boiler water is free
check weekly after installation to determine the strainer cleaning
interval.
Instructions for the installer
13
including an air bleed valve so the strainer can be isolated from
the heating circuit for servicing. Clean water is important,
blocked heat exchangers do not fall under warranty. The filter
should be installed when replacing boilers in existing systems.
The manufacturer declines any liability for damage caused to
the boiler by failure to install or inadequate installation of
this filter. Before switch on the boiler, water must be circulate at
least 2 hours for elimination the impurities from the system
trough the micro impurity seperator. In the end of the operation,
safety drain valve must be opened for removing the impurities.
It is also possible to use plate heat exchangers according the
system characteristics. In any case, micro impurity seperators
must be used in the system in the boiler. Before installation,
carefully wash all the pipes of the system to remove any
residuals or impurities that could affect proper operation of the
unit. Filter must also be installed on the system return piping to
prevent impurities or sludge from the system clogging and
damaging the boiler.
We advise to mount valves before and after the strainer
There is an automatic air vent mounted in the boiler to remove
air from the water circuit. This automatic air vent is only for
eliminate the air in the heat exchanger of the boiler. One or more
always be installed in the heating system to eliminate air trapped
in the heating circuit.
4.1.13 PUMP
The W
circulation pump with 3-position electric speed control. The
pump is the single-phase type (230 V - 50 Hz). To ensure
optimal boiler operation, in the case of new systems (single
pipe and module) it is recommended to use the pump at
maximum speed. The pump runs when heat is required. When
heat is no longer required, the pump will continue to run for
another 3 minutes before it stops. The 24-hour cycle starts as
soon as the power supply to the boiler is activated.
4.1.12 AUTOMATIC AIR VENT
Dirt
seperator
Air
seperator
Low loss
header
Plate heat
exchanger
Filter
0.0 0.5 1.0 1.5 2.0 2.5 3.0
QH Chart
8
7
6
5
4
3
2
1
0
H [m]
3
Q [m /h]
67
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