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page 7

WARNING! It is important to verify that the
installation is in compliance with current
regulations and that it is approved, wherever
necessary, by the competent inspection
authorities.

1.8 THE USE OF DUCTS WITH THE WD

VERSION

The technical, functional, and aesthetic
characteristics of the W and WR air heaters
have been researched to achieve their optimal
use inside the rooms where heating is required.

The experience we have acquired in these types
of applications has resulted in further possible
solutions for the WD version, which was
specifically developed for installation on the
ceiling with ducts.

This version has a galvanized steel casing and
was designed to be connected to intake and

delivery ducts. Since the WD air heaters were
designed exclusively for installation on the ceiling,
they come complete with a remote-control panel.

This makes it possible to use a single unit to
serve several rooms or to install the air heater in
a separate room.

Typical examples of these situations could be:

- Efficiency apartments.
- Tourist accommodations, bungalows, etc.
- Doctors’ offices, offices.
- Bars, stores, etc., with the system installed in

a service room.

Using ducts to distribute the air provides a
solution that satisfies most current installation
requirements, with the distribution of the treated
air at a low noise level. However, it is advisable
to contact a qualified heating technician to
evaluate specific installation problems.

1.9 TECHNICAL DATA TABLE

Unit

W-WR 8

WD 8

W-WR 10

WD 10

Rated thermal capacity

kW

8,90

10,50

kcal/h

7.650

9.030

Rated thermal power

kW

8,05

9,50

kcal/h

6.900

8.150

Gas flow rate

G20 Methane

m³/h

0,94

1,11

(15 °C - 1.013 mbar)

G30 Butane

kg/h

0,70

0,83

G31 Propane

kg/h

0,69

0,81

Gas pressure

G20 p 20 mbars

mbar

14,5

12,0

at the burner

G30 p 28-30 mbars

mbar

27,0 - 29,0

27,0 - 29,0

(15 °C-1.013 mbars)

G31 p 37 mbars

mbar

36,0

36,0

Diameter of the

G20

mm/100

240

280

gas injector

G30 / G31

mm/100

150

170

Ventilation

Minimum speed

m³/h

720

750

850

900

air capacity

Maximum speed

m³/h

850

860

1.040

1.040

Noise level

Minimum speed

dBA

42

41,5

43

46,5

at 3 meters

Maximum speed

dBA

43

44,6

45,5

49

Effective pressure

Maximum speed

Pa

/

40

/

40

Gas supply diameter

in.

G 1/2 A

Flue gas discharge / air supply diam.

mm

60

Electric power supply

    230 V ~ / 1 / 50 Hz

Fuse (rapid type)

A

2

Power absorbed

W

170

180

180

190

Net weight

kg

56

54

58

56

page 30

b) The ignition electrode is no longer connected

to the equipment connector.

-

Restore the connection or replace the
electrodes. Do not make any connections so
as to avoid reducing the cable insulation level.

c) The ignition electrode(s) is (are) not correctly

positioned or the ceramic insulation is
damaged, with a subsequent leakage of the
ignition discharge.

-

Replace the ignition electrode(s).

7.2.4 At the end of the preventilation phase,

the ignition discharge takes place, but
the flame does not  ignite and the
control equipment shuts down within
the safety time

a) There is no gas supply or there is air inside

the piping.

-

Determine the reason why there is no gas
supply by first checking the on-off valves on
the delivery line. Completely bleed off any
residual air and restart the unit.

b) The gas solenoid valves do not open because

the coils are malfunctioning or their electrical
connection has been interrupted.

-

Check that the connection cable and the
corresponding terminals are in good condition.
Use a special tool to verify if the coils have
failed and replace them, if necessary (see
point 8.3).

c) The safety thermostat is malfunctioning and

does not allow the solenoid valves to open.

-

Replace the safety thermostat (see point
8.6).

7.2.5 At the end of the preventilation phase,

the ignition electrode sparks and the
flame ignites correctly, but the control
equipment shuts down within the safety
time

a) The phase-neutral electric power supply is

not correctly connected to the respective
terminals, marked as “L” and “N”, and
reversing the polarity may deactivate the
flame detection device.

-

Check using a multimeter or phase detector
and correctly connect the cables to the
corresponding terminals.

b) The flame detection electrode is not correctly

positioned and is not in contact with the flame.

-

Check if the electrode is properly connected
and if there are any deformations. Comply
with what is indicated in figure 30.

c) The flame detection electrode electric

connection has been interrupted.

-

Check the electrode connection to the control
equipment. If the cable or ceramic insulation is
damaged, replace the electrode in accordance
with the positions shown in figure 30.

7.2.6 The control equipment locks out during

normal operation

a) The gas supply was cut off and the equipment,

after repeating the ignition cycle, and without
detecting the flame within the safety time
period, entered the lock out mode.

-

Determine why the gas supply to the air
heater was interrupted. Restart the appliance
using the Reset button on the control panel.

b) The incorrect positioning of the external intake

and exhaust terminals has caused combustion
products to return and this prevents the flame
from igniting properly and from being detected
by the electrode.

-

Change the positions of the outside terminals,
keeping in mind that the exhaust terminal
must stick out farther than the intake terminal
(see fig. 19 and fig. 20). Check that the
terminals are not installed inside niches or
recesses in the walls and that there are no
obstructions that prevent the air from
circulating freely.

c) The safety thermostat cuts off the supply to

the gas solenoid valve because overheating
has occurred due to incorrect operation or a
failure of the convection fan(s).

-

Check for obstructions or dust deposits on the
filter and/or on the fan. Replace the
malfunctioning fan, if necessary (see point 8.9).

d) The safety thermostat cuts off the supply to

the gas solenoid valve because overheating
has occurred due to incorrect operation of the
fan control thermostat.

-

Replace the fan control thermostat (see point
8.5).

7.2.7 The burner stops while it is operating,

even though the room temperature does
not require it

a) The control panel’s room thermostat is

defective or the panel (in the versions to be
installed on the ceiling) is not correctly
positioned in the room to detect the tempera-
ture properly.

-

If you believe that the panel’s position is
correct, but there is still a defect, it will be

Содержание W

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Страница 2: ......

Страница 3: ...al data table 7 1 10 Dimensions WR and WD versions 8 page 36 Gas fired convection heaters with fan W WR WD series Models 8 10 Technical Information Code 25259501 GB Rev 3 10 05 05 WARNING Whentheburne...

Страница 4: ...open and the electric power supply is on 10 3 2 The instructions to the control panel functions which follow refer to fig 35 a Turn the room thermostat knob E clockwise to the maximum value b Turn swi...

Страница 5: ...e user to carry out the operations indicated in point 11 1 of this manual at least once every two months 9 2 YEARLY INSPECTION 9 2 1 Control and safety devices WARNING Specific technical skills are re...

Страница 6: ...this solution would present technical or functional advantages For ceiling installation WR version in rooms where there is not enough free space on the walls For ceiling installation with duct con nec...

Страница 7: ...d a combustion chamber which houses an atmospheric burner which generates an axial flame The combustion products are exhausted outdoors by a centrifugal fan The ventilation unit which is made up of tw...

Страница 8: ...e the remodelingofbuildingunitsasresidences offices stores orworkshopsiscomplicatedbyaseriesof technical and structural problems that make it difficult to install a traditional heating system These sy...

Страница 9: ...first checking the on off valves on the delivery line Completely bleed off any residual air and restart the unit b Thegassolenoidvalvesdonotopenbecause the coils are malfunctioning or their electrica...

Страница 10: ...tch does not reset the contacts to the proper position see point 8 4 d The flue gas expeller fan s motor has failed and the differential pressure switch will not allow startup to proceed Change the fa...

Страница 11: ...y plastic caps and then using the point of a screwdriverasalevertoreleasethefastening springs in the rear d Remove the 2 screws which attach the gas supply pipe connector to the combustion chamber fig...

Страница 12: ...ses and about the importance of periodic tests which must be performed at least once every year by skilled personnel 6 GAS TYPE CHANGE 6 1 SWITCHING FROM GAS IN THE SECOND GROUP NATURAL GAS TO GAS IN...

Страница 13: ...ressure of 20 mbar Instead if gas from the third group is used LPG first carry out the operations described in point 6 1 5 1 4 Check that the gas on off valves on the meter and on the air heater are o...

Страница 14: ...the wall with a center distance of 120 mm Insert the screw anchors and attach the rear part of the panel to the wall Put the front part of the panel back by snapping it in place Ifyoushouldneedtoinse...

Страница 15: ...R and WD WARNING For your safety due to the weight of the unit and the possible difficulties of installingit itisadvisabletouseamechanical hoisting device for positioning the air heater For these same...

Страница 16: ...ts must be made on the free ends opposite the wind protection terminals Make sure that they are cut squarely and trim off any burrs NOTE The exhaust flue is the longer of the two c Insert the ducts in...

Страница 17: ...R and WD Once the unit s position has been determined bend the supplied paper template on the dashed line and apply it to the ceiling with adhesive tape fig 17 a Indicate the position of the four hole...

Страница 18: ...from ACCORRONI S r l In any case any increases to the length of the ducts must respect the limits specified in the next point 4 2 2 Duct length limits If the duct passes directly through an outside w...

Страница 19: ...between the rear part of the unit and the wall so as to permit correct air intake and to allow the filter to easily be removed for cleaning fig 13 For the WD version make sure that the air intake sys...

Страница 20: ...k making sure to observe the instructions reported on the box indicated by the special graphic symbols When delivered check that no visible damage on the packing and or on the appliance has occurred d...

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