COSMOGAS NOVADENS 24, NOVADENS 24C, NOVADENS 34, NOVADENS 34C, NOVADENS 45A User Manual

62417003 - R00 07-12-2007_GB-IE

MODELS:

NOV ADENS 24 - 24B
NOV ADENS 24C - 24P
NOV ADENS 34 - 34B
NOV ADENS 34C - 34P
NOV ADENS 45A - 45C

USERS’ MANUAL FOR GAS BOILERS

PLEASE READ THE MANUAL CAREFULLY: IT CONTAINS IMPORTANT INFORMATION

REGARDING SAFETY, INSTALLATION, USE AND MAINTENANCE OF THE APPLIANCE

2

T able of contents

1 - GENERAL SAFETY WARNINGS........................................................................... 3

2 - GENERAL INFORMATION ..................................................................................... 4

2.1 - Introduction ............................................................................................................................... 4

2.2 - Description of models ............................................................................................................... 4

2.3 - Manufacturer ............................................................................................................................. 4

2.4 - Key to symbols used ................................................................................................................. 4

2.5 - Warranty ................................................................................................................................... 4

3 - USE.......................................................................................................................... 5

3.1 - Check that the cocks are open .................................................................................................. 5

3.2 - Check heating system pressure ................................................................................................ 5

3.3 - Overview...................................................................................................................................5

3.4 - Displays.................................................................................................................................... 6

3.5 - St art-up procedure .................................................................................................................... 6

3.6 - “Users’ menu”............................................................................................................................ 6

3.7 - Summer mode .......................................................................................................................... 7

3.8 - Winter mode .............................................................................................................................7

3.9 - Adjusting the heating temperature .............................................................................................7

3.10 - Adjusting the heating temperature with climatic adjustment......................................................7

3.1 1 - Domestic hot water temperature adjustment ............................................................................ 8

3.12 - Room temperature adjustment ................................................................................................ 8

3.13 - Errors and alarms ................................................................................................................... 8

3.14 - Pressure gauge ......................................................................................................................8

3.15 - Shutdown procedure ............................................................................................................... 9

3.16 - Precautions against freezing ................................................................................................... 9

3.17 - Flue gas discharge ................................................................................................................. 9

3.18 - Operating anomalies............................................................................................................... 9

3.19 - Remote control (on request) .................................................................................................. 10

4 - Warranty................................................................................................................. 11

4.1 - General warranty conditions ....................................................................................................11

4.2 - Instructions for filling in the warranty card ................................................................................. 11

4.3 - Warranty limits......................................................................................................................... 11

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If you smell gas

l Close the gas cock.
l Ventilate the room.
l Do not use any electrical appliances, telephone

included.

l Immediately call a qualified technician or the gas

board from another room or building. If you cannot
contact them, call the Fire Brigade.

If you smell product of the combustion

l Switch off the appliance.
l Ventilate the room.
l Call a qualified technician.

In the presence of water leaks

l Switch off the appliance.
l Close the central water mains cock.
l Call a qualified technician.

Explosive or easily inflammable products

Do not store or use explosive or easily inflammable
materials such as paper, solvents, paints, etc..., in
the same room as the boiler.

In the event of a breakdown

In the event of breakdown and/or malfunctioning of the
appliance, disconnect it, do not attempt to repair it or
intervene in any way whatsoever. Cont act a qualified
technician.

Qualified technicians

Qualified technicians are personnel with specific,
technical training in the heating system component
sector and with regards to domestic hot water
production for public use, fuel gas systems and
electrical systems. These individuals must have the
legally required qualifications.

1 - GENERAL SAFETY WARNINGS

FThis booklet forms an integral and essential

part of the product and must be carefully kept
by the user, for any future consult ation. Ensure
that this booklet is handed over to the new
owners and/or installer if the appliance should
change hands or be moved for any reason
whatsoever.

FThe installation, setting and modification of

the gas appliance must be carried out by
qualified technicians, in compliance with local
and national norms and the instructions in the
installation and maintenance manual.

FFlue pipes must not be modified in any way.
FThe user, in accordance with these instructions,

must keep the appliance in satisfactory running
order and ensure reliable, safe operating.

F The user is responsible for employing a

qualified technician to carry out maintenance
work on the appliance in compliance with local
and national norms and the matters stated in
the installation and maintenance manual. We
highly recommend arranging a regular
maintenance contract with a qualified
technician.

FThe manufacturer cannot be held responsible

for any damage to people, animals or property
caused by inadequate maintenance.

FDo not obstruct the ends of the venting pipes .
FThe technician will explain the functioning,

use of the appliance and use of the system to
the user.

FThe user must be familiar with filling and

discharge procedures for the boiler, and the
control and eventual adjustment of water
pressure in the heating circuit.

FThe user must be familiar with the

procedures for fully optimizing the
conservation of energy and avoiding waste
of the entire heating system.

FRegularly check the system pressure using

the pressure gauge “13” (see figure 1) to
ensure a reading between 1 and 1.5 bar.

FWait a few minutes after opening the gas

supply cock before starting the boiler up.

FDo not leave the boiler switched on

unnecessarily if it is not going to be used for
long periods; in such situations, close the gas
cock and disconnect from the electricity
mains supply . Consult section 3.16 if there is
a risk of freezing.

FDo not touch the flue gas discharge pipe,

during and for some time after operations, as
it is very hot.

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2 - GENERAL INFORMATION

2.1 - Introduction

Congratulations!
Y ou have ef fectively purchased one
of the best products on the market.
Each single part is built, tested and
assembled, with pride, at the
COSMOGAS factories, thereby
guaranteeing optimum quality
control.
Thanks to on-going research
carried out by COSMOGAS, this
product has been conceived and is
considered to be the best in its
class with regards to respect for

the environment, since it falls within
class 5 (less polluting) envisaged
by technical norm EN 297 (and EN

483) and has an elevated efficiency ,
4 stars as per EC Directive 92/42/
EEC. Great importance is also
given to the end of the appliance’s
useful life. All its components can
easily be separated into similar and
completely recyclable parts.

2.3 - Manufacturer

COSMOGAS srl
Via L. da Vinci 16
47014 - Meldola (FC) IT AL Y
T el. [phone]
Fax. [phone]
www.cosmogas.com
[e-mail]

2.4 - Key to symbols
used

General danger!

Failure to observe this warning may
compromise the smooth running of the
appliance or cause serious damage to
individuals, animals or property .

l Operation symbol

F Important indication symbol

2.5 - W arranty

See section 4

NOVADENS XXYYYY

“ “ =

Boiler with exchanger sanitary to partial accumulation;
“A” = Boiler for only heating without integrated pump;
“B” = Boiler which can be combined with BWR C series storage tank;
“C” = Boiler for only heating with integrated pump;
“P” = Boiler with exchanger secondary for D.H.W., to plates;
“0834” = Boiler for low temperature central heating systems.

24 = Boiler with maximum input heat of 25 kW
34 = Boiler with maximum input heat of 34.8 kW

Gas-fired, condensing, hot water boiler, with sealed combustion chamber
and pre-mix burner, for heating and domestic hot water production.

2.2 - Description of
models

5

3 - USE

Figure 1 - Instrument panel

3.1 - Check that the
cocks are open

- The gas cock must be open;

- any supply and return valves must be
open;

- any hot and cold water valves must be
open.

3.2 - Check heating
system pressure

If the pressure inside the heating circuit
falls below 0.5 bar, the appliance
switches off and the display 1 as per

figure 1, shows to indicate
that it is necessary to restore the correct

pressure. Proceed as follows:
l open the filling cock (see figure 5)

turning it in a counter-clockwise
direction;

l check the pressure on the pressure

gauge “13” of figure 1, it must reach a
pressure of 1.5 bar and the indication

must disappear;

l close the filling cock (see figure 5)

turning it in a clockwise direction.

CAUTION!!! During normal

operations, the filling cock (see
figure 5) must always remain in the
closed position.

If, with time, the pressure drops, restore
the correct value. This operation may
have to be repeated several times
during the first month of operations to
remove any gas bubbles present.

3.3 - Overview

The boiler is pre-set with standard
parameters. However , it is possible to
make a number of changes or consult
the parameters by means of using the
“Users’ Menu” (see section 3.6).
During functioning display “1” of figure 1
displays the status of the boiler and
display “2” (see figure 1) shows the

value of the parameter. The various
operating statuses are shown in the
table in figure 2.
Within the “Users’ Menu” (see section

3.6) it is possible to check the last
lock-outs or errors which have occurred.
In addition to the operating modes, the
instrument panel provides important
information on the current functioning of
the boiler, via the indicators “3”, “4”, “5”
and “6” of figure 1. In particular:

- the indicator “3” displays whether the
burner is functioning (on) or whether it is
off (blinking);

- the indicator “4” displays whether the
domestic hot water service is on or off;

- the indicator “6” displays whether a
heating service request is active (on) or
nor (off).

1 - Parameter display .
2 - Display of values adopted by parameters.
3 - Burner status indicator . On = burner on, flashing = burner off.
4 - Domestic hot water service status indicator. On = d.h.w. on, Off = d.h.w. off.
5 - Indicator of decimal of value displayed.
6 - Heating service status indicator. On = heating on, Of f = heating off.
7 - Heating temperature and start control.
8 - Key for decreasing parameter values.
9 - Key for resetting shutdowns and for scrolling the list of parameters.
10 - Key for increasing parameter values.
1 1 - Domestic hot water temperature and start control.
12 - On/off power switch.
13 - Heating circuit pressure gauge.