
5
ENGLISH
1 - WARNINGS AND SAFETY
b The boilers produced in our plants are built with great attention to 
detail and every component is checked in order to protect users and 
installers from injury. After working on the product, qualied personnel 
must check the electrical wiring, in particular the stripped part of 
conductors, which must not stick out from the terminal board, avoiding 
possible contact with live parts of said conductor.
b This instruction manual, together with the user manual, are integral 
parts of the product: make sure it remains with the appliance, even 
if it is transferred to another owner or user, or moved to another 
heating system. In case of loss or damage, please contact your local 
Technical Assistance Service for a new copy.
b Boiler installation and any other assistance and maintenance 
operations must be carried out by qualied personnel according to 
the provisions of the legislation in force.
b The installer must instruct the user about the operation of the 
appliance and about essential safety regulations.
b This appliance should not be operated by children younger than 8 
years, people with reduced physical, sensory or mental capacities, 
or inexperienced people who are not familiar with the product, unless 
they are given close supervision or instructions on how to use it safely 
and are made aware by a responsible person of the dangers its use 
might entail. Children must not play with the appliance. It is the user’s 
responsibility to clean and maintain the appliance. Children should 
never clean or maintain it unless they are given supervision.
b This boiler must only be used for the application it was designed for. 
The manufacturer declines all contractual and non-contractual liability 
for injury to persons or animals or damage to property deriving from 
errors made during installation, adjustment and maintenance and 
from improper use.
b After removing the packaging, make sure the contents are in good 
condition and complete. Otherwise, contact the dealer from whom 
you purchased the appliance.
b The safety valve outlet must be connected to a suitable collection and 
venting system. The manufacturer declines all liability for any damage 
caused due to any operation carried out on the safety valve.
b Dispose of all the packaging materials in the suitable containers at the 
corresponding collection centres.
b Dispose of waste by being careful not to harm human health and 
without employing procedures or methods which may damage the 
environment.
b During installation, inform the user to:
- in the event of water leaks, the water supply must be shut off and 
the Technical Assistance Service must be contacted immediately.
- it is necessary to periodically check that the operating pressure of 
the hydraulic system is above 1 bar. If necessary, reset the pressure 
as indicated in the paragraph entitled “Filling the system”
- if the boiler is not used for a long time, the following operations are 
recommended:
- turn the main switch of the appliance and the main switch of the 
system to the “off” position
- close the fuel and water taps of the heating system
- drain the heating system to prevent freezing.
 At the end of its life, the product should be not be disposed of as solid 
urban waste, but rather it should be handed over to a differentiated 
waste collection centre.
For safety, always remember that:
a it is dangerous to activate electrical devices or appliances (such as 
switches, home appliances, etc.) if you smell gas or fumes. In the 
event of gas leaks, ventilate the room opening doors and windows; 
close the main gas tap; contact the Technical Assistance Service or 
professionally qualied personnel immediately 
a do not touch the boiler while barefoot, or if parts of your body are wet 
or damp
a before any cleaning operations, disconnect the boiler from the mains 
power supply by turning the two-position system switch and the main 
control panel switch to the “OFF” position
a do not modify safety and adjustment devices without the 
manufacturer’s permission and relative instructions
a do not pull, disconnect or twist the electric cables coming out of the 
boiler, even when it is disconnected from the mains power supply
INSTALLATION MANUAL
EN ENGLISH
a avoid covering or reducing the size of the ventilation openings in the 
installation room 
a  do not leave inammable containers and substances in the installation 
room
a keep packaging materials out of the reach of children
a it is forbidden to obstruct the condensate drainage point.
2 - DESCRIPTION
Ciao Green C.S.I. is a Type C wall-mounted condensing boiler designed 
for heating and production of domestic hot water: according to the ue gas 
discharge device, the boiler is classied in categories B23P, B53P, C(10) only 
for 25kW,  C13, C33, C43, C53, C63, C83, C93;  C13x, C33x, C43x, C53x, 
C63x, C83x, C93x.
In  conguration  B23P and  B53P  (when  installed  indoors),  the  appliance 
cannot be installed in bedrooms, bathrooms, showers or where there are 
open  replaces  without  a  proper  air  ow.  The  room  where  the  boiler  is 
installed must have proper ventilation. 
In conguration C, the appliance can be installed in any type of room and 
there are no limitations due to ventilation conditions or room volume.
3 - INSTALLATION
3.1 Installation regulations
 During boiler installation the use of protective clothing is recommended, 
in order to avoid personal injury.
Installation must be carried out by qualied personnel, in accordance with 
the regulations in law.
POSITION
The boiler can be installed indoor and outdoor, in a partially protected place 
(i.e. a place where the boiler is not exposed to direct contact or inltration of 
rain, snow or hail). The boiler can operate in a temperature range from 0°C 
to +60°C. For further details, refer to “Anti-freeze system” section. 
ANTI-FREEZE SYSTEM
The  boiler  is  tted  as  standard  with  an  automatic  anti-freeze  system that 
actives when the water temperature in the primary circuit falls below 6°C. 
This system is always active, guaranteeing boiler protection down to an 
installation area temperature of 0°C. To take advantage of this protection, 
based on the burner operation, the boiler must be able to switch itself on; any 
lockout condition (i.e. due to a lack of gas or electrical supply, or the intervention 
of a safety device) therefore deactivates the protection. By using a specic 
accessory, the DHW circuit can be protected in case of temperatures lower 
than 0°C up to -10°C. This system is made by a series of electrical resistances. 
To use the anti-freeze protection, an electrical supply is required; this 
means that any blackout or disconnection will deactivate the protection. 
The anti-freeze protection is also active when the boiler is on stand-by. In 
normal operation conditions, the boiler can protect itself against freezing. In 
areas where temperatures may fall below 0°C, or when the machine is left 
unpowered for long periods, you are advised to use a good quality anti-freeze 
liquid in the primary circuit to avoid the risk of freezing if you do not want 
to drain the heating system.Carefully follow the manufacturer’s instructions 
with regards not only the percentage of anti-freeze liquid to be used for the 
minimum temperature at which you want to keep the machine circuit, but also 
the duration and disposal of the liquid itself. For the hot domestic water part, 
we recommend you drain the circuit. The boiler component materials are 
resistant to ethylene glycol based anti-freeze liquids.
MINIMUM DISTANCES
In order to have access to the boiler to perform regular maintenance 
operations, respect the minimum clearances foreseen for installation (g. 9).
For correct appliance positioning:
- do not place it on a cooker or other cooking device
-  do not leave inammable products in the room where the boiler is installed
- heat sensitive walls (for example, wooden walls) must be protected with 
proper insulation.
IMPORTANT
Before installation, wash all system piping carefully in order to remove any 
residues that may impair the operation of the appliance.
Connect the drain manifold to a suitable drainage system (for details, refer 
to chapter 3.5). The domestic hot water circuit does not need a safety valve, 
but make sure that the pressure of waterworks does not exceed 6 bar. In 
case of doubts, install a pressure reducer. Prior to ignition, make sure that 
the boiler is designed to operate with the gas available; this can be checked 
by the message on the packaging and the adhesive label indicating the gas 
type. It is very important to highlight that in some cases the smoke pipes are 
under pressure and therefore, the connections of several elements must 
be airtight.
In some parts of the manual, some symbols are used:
b WARNING = for actions requiring special care and adequate 
preparation
a FORBIDDEN = for actions that MUST NOT be performed
For AU and NZ
PLEASE READ THESE  INSTRUCTIONS  BEFORE STARTING THE 
INSTALLATION.
THIS  APPLIANCE  MUST  BE  INSTALLED  BY  AN  AUTHORISED 
PERSON ONLY.
This boiler is to be installed and serviced to the requirements of AS/
NZ5601  and  AS/NZS3500.4  and  all  local  building,  gas,  water  and 
electrical authorities.