Riello Start Aqua Condens 25/60 BIS, Installer And User Manual

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Start Aqua Condens 25/60 BIS
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- Range Rated - this means the boiler is equipped with a device that
adapts it to the heat requirements of the system, so the boiler out-
put can be adjusted according to the energy needs of the building.
- Circulator anti-blocking.
- First-level antifreeze (suitable for indoor installations).
- 10 litre expansion tank.
- 2 litre DHW expansion tank.
- Digital display indicating the operating temperature and alarm codes.
- Pre-mix low emissions burner.
- Continuous electronic flame modulation for domestic hot water and
heating.
- Premix combustion system which ensures a constant air-gas ratio.
- Anti-legionella: Legionella is a disease that can be contracted by
inhaling small droplets of water (aerosols) which contain the Le-
gionella bacteria (bacteria occurs naturally in lakes and rivers all
over the world).
- The decimation of the bacterium is obtained by taking the stored
water to a temperature over 50/55° C.
- It is therefore recommended to position the DHW temperature se-
lection knob to maximum at least every 2/3 days, taking the tem-
perature of the stored water to 60° C, and maintaining this temper-
ature 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 fol-
lowing safety devices:
Safety valve
that intervenes in the event of excessive hydraulic pres-
sure (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 con-
densate 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).
The intervention of the safety devices indicates a boiler mal-
function, therefore immediately contact the Riello Technical As-
sistance Centre.
The boiler must not be put in service, even temporarily, with
non-operating or tampered safety devices.
The safety devices must be replaced by the Riello 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 heat-
ing 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.
The "anti-locking" function is only activated when the boiler is
electrically powered.
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 plumbing fittings
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 600 mm
P 450 mm
H 940 mm
net weight 64 kg
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 vol-
ume since the
Start Aqua Condens 25/60 BIS
boiler has an "air-
tight" 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.
Consider the clearances necessary to access safety and ad-
justment devices and to perform maintenance operations.
Check that the electric protection level of the appliance is suit-
able for the installation room characteristics.
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.