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It is therefore recommended to position the DHW temperature
selection knob to maximum at least every 2/3 days, taking the
temperature of the stored water to 60° C, and maintaining this
temperature for a minimum time of 5 minutes.
- Ambient thermostat or programmable timer, remote control or
local valve prearrangement.
- Provision for external probe connection that enables the climate
control function.
- Prepared for limit thermostat on reduced temperature systems.
- Self-diagnostics for signalling the cleaning of the primary circuit
heat exchanger.
2.1
Safety devices
The Start Aqua Condens 25/60 BIS boiler is equipped with the
following safety devices:
- Safety valve that intervenes in the event of excessive hydraulic
pressure (max 3 bar).
- Water circuit diagnosis which safeguards the boiler in the
event of insufficient circulation or lack of water. The electronics
of the boiler, by comparing the temperature read by the outlet
and return sensors (circulation analysis) and the rise rate of
the output temperature (no water analysis) ensures the safety
lockout of the appliance.
- Flue gas probe: this intervenes (putting the boiler in safety stop
mode) if the temperature of the combustion products exceeds
the maximum operating temperature of the discharge pipes.
- Flue gas safety evacuation system incorporated in the
pneumatic operation of the gas valve subject to the premix
burner. The gas valve is opened based on the quantity of air
pushed by the fan. This implies that, if the flue gases exhaust
circuit is blocked, the air flow is cancelled and the valve does
not have the ability to open. Furthermore, the float present in
the siphon prevents any passage of the flue gases from the
condensation discharge.
- Condensate discharge obstruction safety device that
via a condensate level sensor blocks the boiler if the level of
condensate in the heat exchanger exceeds the limit allowed.
- Over-temperature safety device on both the delivery and return
lines, with dual probe (limit temperature 95°C).
9
The intervention of the safety devices indicates a boiler
malfunction, therefore immediately contact the Technical
Assistance Centre.
9
The boiler must not be put in service, even temporarily, with
non-operating or tampered safety devices.
9
The safety devices must be replaced by the Technical
Assistance Centre, using exclusively original manufacturer
components.
After carrying out the repair, perform an ignition test.
2.2
Circulator
The residual discharge head for the heating system in terms of flow
rate is outlined in the graph (fig. 1-2).
The heating system pipes must be dimensioned bearing in mind
the residual discharge head available.
Note that the boiler is working properly if the heat exchanger for
heating has sufficient water circulation.
For this reason, the boiler is fitted with an automatic by-pass that
sets the correct flow rate for the water in the heat exchanger for
heating in any system condition.
The boilers are equipped with an anti-blocking system which starts
up an operation cycle after every 24 hours of stop, with the mode
selector in any position.
9
The "anti-locking" function is only activated when the boiler is
electrically powered.
0
It is strictly forbidden to operate the circulator without water.
3 -
INSTALLATION
3.1
Receiving the product
The Start Aqua Condens 25/60 BIS boiler is supplied in a single
pack protected by cardboard packaging.
The boiler is supplied as standard with the following material:
- instruction booklet for the installer and user
- bar code labels
- supporting cross-member
- package with hydraulic fittings.
9
The instruction booklets are an integral part of the boiler and
there it is recommended to read them carefully and keep them
in a safe place.
3.2
Dimensions and weights (fig. 3)
Start Aqua Condens 25/60 BIS
L
P
H
net weight
3.3
Handling
After unpacking, handling of the boiler is done manually using the
support frame (fig. 4).
3.4
Installation room
In configuration C, the appliance can be installed in any type of
room and there are no limitations due to ventilation conditions or
room volume since the Start Aqua Condens 25/60 BIS boiler
has an "airtight" combustion circuit in relation to the installation
environment.
In configuration B23P, B53P the appliance cannot be installed in
bedrooms, bathrooms, showers or where there are open fireplaces
without a proper air flow. The room where the boiler is installed
must have proper ventilation.
9
Consider the clearances necessary to access safety and
adjustment devices and to perform maintenance operations.
9
Check that the electric protection level of the appliance is
suitable for the installation room characteristics.
9
If the boilers are supplied with fuel gas of a specific weight
greater than that of the air, the electric parts will have to be
positioned more than 500mm above ground level.
3.5
Installation on appliances that are old or that need to
be updated
When the Start Aqua Condens IS boiler is installed in old systems
or systems being updated, verify that:
- The smoke pipe is suitable for the temperature of the combustion
products with condensation, calculated and built according to
Standard, is as straight as possible, airtight, insulated and has
no blockages or narrow sections. It is equipped with appropriate
condensate collection and discharge systems
- The electrical system is installed in compliance with the specific
standards and by qualified personnel
- The fuel supply line and eventual tank (LPG) are made according
to specific Standards
- The expansion tank ensures the total absorption of the dilatation
of the fluid contained in the system
- The flow rate and head of the circulator are suitable to the
characteristics of the system.
- The system has been washed and cleaned of mud and grime, de-
aerated and water tight. It is recommended to install a magnetic
filter on the return of the system.
- The boiler condensate drain system (siphon) is connected and
routed to the collection of "white" water.
9
The manufacturer is not liable for any damage resulting from
the incorrect construction of the flue gas discharge system.
9
The flue gas discharge pipes for condensing boilers are made
of special materials that are different compared to those made
for standard boilers.
ENGLISH
600
mm
450
mm
940
mm
64
kg
25
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