User’ manual
CLAS HE
Condensing wall hung system boiler
G.C.N : 47-116-51 (24 kW)
G.C.N : 47-116-52 (30 kW)
G.C.N : 47-116-53 (38 kW)
CLAS HE 24
CLAS HE 30
CLAS HE 38
ꢀ
The code of practice for the installation,
commissioning & servicing of central heating systems
user’manual
Auto Function
The AUTO function serves to optimise boiler performance, while maintaining an optimum radiator temperature and maximum
user comfort. It ensures the building stays at the ideal temperature, whilst saving energy.
The principle is that the water temperature at the boiler outlet is automatically adjusted, depending on the interior ambient
temperature.
Control Panel
Ignition procedure
Press the ON/OFF button on the control panel to switch on the boiler.
The display shows:
1
2
17
16
15
14
13
3
4
1
2
24
23
3
22
4
12
21
5
20
6
�
12
1 8
8
5
6
1 7
9
6
1 6
1 0
1 5
1 1
1 4
1 2
1 3
11
10
9
7
8
The first figure indicates the operating mode:
Legend :
0
C
c
- Stand -by,
- Central heating request
- Heating post-circulation
1. Display
ꢀ. Reset button
ꢁ. Red indicator locking light
4. Orange indicator COmfORt fonction
5. Pressure gauge
6. Heating temperature regulation knob
7. button
8. menu/Ok button (Programming key)
9. esC button
10. button +
d
H
F
- Domestic hot water request
- Hot water post-circulation
- Circulation pump anti-freeze protection enabled
- burner anti-freeze protection enabled
_
The second and third figures indicate:
-
-
-
-
the flow temperature when no heating requests have been made
the flow temperature in central heating mode
the temperature of the hot water in domestic hot water mode
the flow temperature in anti-freeze mode.
11. Domestic Hot Water adjustment knob
1ꢀ. Time clock
1ꢁ. ON/OFF button
14. Blue indicator burner ON
15. Yellow indicator AutO fonction
16. AutO button (To active Thermoregulation)
17. COmfORt button
Initial operating procedures
If the boiler is installed inside the apartment, make sure that
all provisions relating to the air inlet and room ventilation (in
compliance with current legislation) are respected.
Check the water pressure on the display regularly and make sure
that the figure is between 0.6 and1.5 bar when the system is cold.
If the pressure is just under the minimum value the display will
request a filling procedure.
Re-establish the correct pressure by filling loop.
If the pressure drops very frequently, there may be a water leak at
some point in the system. If this is the case a plumber should be
contacted.
ꢁ
user’manual
Winter or summer function
Turn the heating button 6 to select the desired operating mode
(winter or summer). In winter mode every heating is shown on the
display by the heating temperature.
Summer mode is set by putting the button 6 in
position (hea-
ting off).
Adjusting the heating
It is possible to set the temperature of the heating water by
adjusting the knob 6. By placing the indicator somewhere between
min. and max. a temperature may be obtained which varies from
about ꢀ0°C to about 45°C (low temperature) and about ꢁ5°C to
about 8ꢀ°C (high temperature).
Domestic hot water temperature adjustement
It is possible to set the temperature of the domestic hot water by
adjusting the knob 11 a temperature may be obtained which va-
ries from about ꢁ6°C to about 60°C.
The value set previously will flash on the display.
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user’manual
COMFORT function
To activate the comfort mode it is necessary to press the comfort
button 17, this will be indicatd by a yellow light 4. The comfort
mode has priority over any other heating request.
There are two settings for the comfort mode (they can be adjusted
in the parameters menu):
1. As soon as DHW is drawn, the secondary heat exchanger is kept
warm for ꢁ0 mins.
ꢀ. As soon as DHW is drawn, the secondary heat exchanger is kept
warm permanently.
This function may be enabled by pressing the COMFORT button.
Switching off the heating
To switch off the heating mode turn the button 6 in the position
. The boiler switches in sanitary mode only and indicating the
set temperature.
Stand by
To switch off the boiler press the ON/OFF 13.
Switch off the boiler completely by switching the external electri-
cal switch to the OFF position; the display will switch off.
Close the gas tap.
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user’manual
Appliance shut-off conditions
Operation shutdown error table
The boiler is protected from malfunctions by means of internal
checks performed by the electronic P.C.B., which stops the boiler
from operating if necessary. In the event of the boiler being shut off
in this manner, a code appears on the control panel display which
refers to the type of shut-off and the reason behind it.
Two types of shut-off may occur:
Display
1 01
Description
Overheating
5 01
No flame detection
Safety shut-off
1 0ꢁ
1 04
1 05
1 06
1 07
This type of error is “volatile”, which means
that the boiler starts up again automatically
as soon as the problem which caused the
shut-off is removed. The display will flash
”Err”and the error code.
Insufficient circulation
In fact, as soon as the cause of the shut-off disappears, the boiler
starts up again and continues to operate normally.
While the boiler is shut off for safety reasons, it is possible to attempt
to restore normal operation by switching the appliance off and on
again using the ON/OFF button on the control panel.
If the boiler still indicates a safety shut-off, switch it off. Make sure
the external electric switch is in the OFF position, close the gas tap
and contact a qualified technician.
ꢁ 05
ꢁ 06
ꢁ 07
P.C.B error
P.C.B error
P.C.B error
Anti-frost Device.
The anti-frost function acts on the central heating flow temperature probe,
independently from other settings, when the electrical supply is turned
on.
If the primary circuit temperature falls below 8°C the pump will run for ꢀ
minutes.
After the two minutes of circulation (fixed) the boiler will check the fol-
lowing:
a) if the central heating flow temperature is > 8°C, the pump stops;
b) if the central heating flow temperature is between 4 and 8°C, the pump
will run for another two minutes;
Safety shut-off due to insufficient water pressure
If the water pressure inside the heating circuit is insufficient, the
boiler will perform a safety shut-off. (See table).
To re-pressurise the boiler, it will be necessary to connect
the silver flexible hose supplied to the two isolating points
underneath the boiler, once the hose is connected, open up both
of the black quarter turn handles, once the pressure reads 1.5 bar
on the display, close both handles and disconnect the hose .
If the pressure drops very frequently, there may be a water leak
at some point in the system. If this is the case please contact your
installer and ask them to check it.
c) if the central heating flow temperature is < 4°C, the burner will fire
(heating position) at minimum power until the temperature reaches
ꢁꢁ°C, the burner will go off and the pump will continue to run for two
minutes.
Operation shutdown
This type of error is “non volatile”, which means that it is not
removed automatically. The display will flash Err and the error
code and the red led lights up “ꢁ”
In this case the boiler does not restart automatically, but it may
be reset by pressing the button. If the problem manifests
The anti-frost device activates only when (with the boiler operating cor-
rectly):
- the system pressure is correct,
- the boiler is electrically powered,
- there is a supply of gas.
.
itself again after several attempts to reset the appliance, contact a
qualified technician.
IMPORTANT
IF THIS SHUTDOWN OCCURS FREQUENTLY, CONTACT AN
AUTHORISED SERVICE CENTRE FOR ASSISTANCE. FOR SAFETY
REASONS, THE BOILER WILL ALLOW A MAXIMUM OF 5 RESET
OPERATIONS TO TAKE PLACE IN 15 MINUTES (INDIVIDUAL
PRESSES OF THE
BUTTON).
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user’manual
Auto button - Temperature adjustment activation
The AUTO function enables boiler operation to be adapted to
environmental conditions and to the type of system it is installed
on.
Comfortable temperature is reached inside the room in the quickest
way possible, without wasting money, energy or efficiency, while
substantially reducing the amount of wear experienced by the
components.
Your installer will advise you on the devices connectable to
the boiler and will program it according to the system.
Innormalboilersthewatertemperatureinsidetheheatingelements
is usually set to a high value (70-80°C), thereby ensuring effective
heating during the few really cold winter days. It then becomes
excessive on less cold days (of which there are many) more typical
of the autumn and winter seasons. This leads to excessive room
heating after the thermostat has been switched off, resulting in
energy waste and uncomfortable conditions inside the room.
The AUTO function“takes control”of the boiler and selects the best
operating regime based on environmental conditions, external
devices connected to the boiler and the performance required. It
constantly decides at which power level to operate based on the
environmental conditions and the room temperature required.
Change of gas type
Our boilers are designed to function either with Natural Gas (meth-
ane) or L.P.G. gas. If you need to change from one gas to the other,
one of our Authorised Service Centres must be contacted to con-
vert the appliance.
Maintenance
Schedule an annual maintenance check-up for the boiler with a
competent person.
Correct maintenance always results in savings in the cost of
running the system.
Failure to arrange an annual service for the appliance will invalidate
the second year of the manufacturers guarantee.
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Commercial subsidiaries:
MTS (GB) Limited
MTS Building
Hughenden Avenue
High Wycombe
Professional Team Limited
Suites 9 & 10, Plaza ꢀ56
Blanchardstown Corporate Park ꢀ
Ballycoolin
Bucks HP1ꢁ 5FT
Telephone: (01494) 755600
Fax: (01494) 459775
Dublin 15
Telephone: (01) 810 ꢁ7ꢀꢁ
Fax: (01) 810 ꢁ7ꢀ7
E-mail: [email protected]
Technical Advice: 0870 ꢀ41 8180
Customer Service: 0870 600 9888
E-mail: [email protected]
Technical Advice: (01) 4ꢁ7 01ꢀ1
Customer Service: (01) 4ꢁ7 01ꢀ1
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