Ferroli DOMIcondens F 28 Instructions For Use, Installation And Maintenance page 4

Before installation, carefully wash all the pipes of the heating system to remove any re-
siduals or impurities that could affect proper operation of the unit (as required by BS 7593
Building regs Doc L).
Carry out the connections to the unit as indicated in fig. 7.
1 2
39 60 60
fig. 7 - Water connections
Shutoff valve kit
Make sure to install the shutoff valves (supplied) between the boiler and the heating sys-
tem, allowing the boiler to be isolated from the system if necessary.
B
The safety valve outlet must be connected to a copper pipe of 15 mm diameter
with continuous fall from the boiler to run off the system water in case of over-
pressure in the heating circuit. Otherwise, if the discharge valve cuts in and
floods the room, the boiler manufacturer cannot be held liable. The drain must
be run to the outside of the building to avoid the risk of damage or injury due to
the hot water in case of overpressure in the system.
Make the boiler connection in such a way that its internal pipes are free of stress. If a
non-return valve is installed also on the DHW circuit (if provided for), it is necessary to
install a safety valve between the boiler and the circuit (with the non-return valve at least
3 m from the boiler) or an expansion tank for domestic use.
For installation, follow the instructions contained in the kit.
Replenishing water
It is necessary to provide for replenishing of the water lost by the sealed system. Refer
to standard BS6798 for the methods of filling and replenishing water in sealed systems.
There must not be a direct connection between the central heating system of the boiler
and the water mains. For the use water coming from the water mains and direct pres-
surisation of the system, refer to the local water management by-laws. This connection,
if provided for, must be interrupted after use.
A connection example (filling loop) is shown in fig. 8.
1 Filling point C. H. 15 mm isolation valve
2 Temporary flexible connection
3 Cold water supply 15 mm isolation valve
4 Double check valve
4
3
fig. 8 - Filling loop
Reference is made to the provisions contained in the water management by-laws.
Water treatment
If water treatment is necessary, Ferroli recommends the exclusive use of specific prod-
ucts such as Fernox or Sentinel to be applied according to the producer's instructions.
For further information, please contact:
Fernox Manufacturing Co. LTD.
Cookson Electronics, Forsyth Road
Sheerwater, Woking, Surrey, GU21 5RZ
Tel.: 0870 8700362
If the boiler is installed in an existing system, any unsuitable additives must be
A
removed by thoroughly cleaning the system. Cleaning of all the systems must
be done in compliance with the requirements of standard B.S. 7593.
In areas with hard water, treatment may be necessary in order to prevent scale
A
from forming in the boiler.
Make sure to use the water treatment product in the right concentration, accord-
A
ing to the producer's instructions.
4
EN
3 4 5
6
60
86 95
2
Sentinel Performance Solutions Ltd
The Heath Business & Technical Park
Runcorn, Cheshire WA7 4QX
Tel.: 0151 424 5351
cod. 3540S920 - 05/2009 (Rev. 00)
Supplied By www.heating spares.co Tel. 0161 620 6677
DOMIcondens F 28
3.4 Gas connection
The gas must be connected to the relevant connection (see fig. 7) in conformity with cur-
rent standards, with a rigid metal pipe or with a continuous surface flexible s/steel tube,
installing a gas cock between the system and boiler. Make sure all the gas connections
are tight.
3.5 Electrical connections
B
The unit must be connected to an efficient earthing system in accordance with
current safety standards. Have the efficiency and suitability of the earthing sys-
tem checked by professionally qualified personnel; the Manufacturer declines
any liability for damage caused by failure to earth the system.
The boiler is prewired and provided with a "Y" type cable (without plug) for con-
nection to the electric line. The connections to the grid must be made with a per-
manent connection and equipped with a double-pole switch with contact
opening of at least 3 mm, installing fuses of max. 3A between the boiler and the
line. Make sure to respect the polarities (LINE: brown wire / NEUTRAL: blue
wire / EARTH: yellow/green wire) in connections to the electric line.
B
The user must not replace the unit's power cable. If damaged, switch off the unit
and have the cable replaced only by professionally qualified personnel. If re-
placing the power cable, only use "HAR H05 VV-F" 3x0.75 mm2 cable with
max. outside diameter of 8 mm.
Room thermostat (optional)
B
IMPORTANT: THE ROOM THERMOSTAT MUST HAVE VOLTAGE-FREE
CONTACTS. CONNECTING 230V TO THE ROOM THERMOSTAT TERMI-
NALS WILL PERMANENTLY DAMAGE THE PCB.
When connecting a time control or timer, do not take the power supply for such
devices from their cutoff contacts. Their power supply must be taken with a di-
rect connection from the mains or with batteries, depending on the type of de-
vice.
Accessing electrical terminal block
Follow the instructions given in fig. 9 to access the electrical connection terminal block.
The layout of the terminals for the various connections is also given in the wiring diagram
in fig. 21.
1
3.6 Fume ducts
Important
The unit is "type C" with sealed chamber and forced draught; the air inlet and fume outlet
must be connected to one of the following extraction/suction systems. Before installation,
check and carefully observe the above prescriptions. Also, comply with the provisions
concerning the positioning of wall and/or roof terminals and the minimum distances from
windows, walls, vents, etc.
Expansion
For fume exhaust pipes longer than 1 metre, during installation take in account
A
the natural expansion of the materials when the boiler is operating.
To prevent any deformation, leave an expansion space of approx. 2 ÷ 4 mm for
every metre of pipe.
fig. 9 - Accessing the terminal block