page 3
SECTION 3 - OPERATING AND MAINTENANCE INSTRUCTIONS FOR THE USER
10.
START-UP ............................................................................................................................ 35
10.1 First firing and testing ............................................................................................................ 35
10.2 Tests ..................................................................................................................................... 35
10.3 Ignition ................................................................................................................................... 35
10.4 Shutdown .............................................................................................................................. 35
10.5 Summer ventilation ................................................................................................................ 36
11.
APPLIANCE MAINTENANCE ............................................................................................... 36
11.1 Routine maintenance to be performed by the user ................................................................ 36
11.2 Annual air heater inspection .................................................................................................. 36
FIGURE SUMMARY
Fig. no.
page
1
Dimensions ............................................................................. - WR / WD versions .............. 8
2
Dimensions ............................................................................. - W version ............................ 9
3
Exploded view ......................................................................... - WR version ....................... 10
4
Exploded view ......................................................................... - WD version ....................... 12
5
Exploded view ......................................................................... - W version .......................... 14
6
Wiring Diagram ..................................................................................................................... 16
7
Control equipment ................................................................................................................ 17
8
Gas unit ................................................................................................................................ 17
9
Differential pressure switch ................................................................................................... 17
10
Fan thermostat ...................................................................................................................... 17
11
Safety thermostat .................................................................................................................. 18
12
Minimum distances for maintenance .................................................................................... 20
13
Position ................................................................................... - WR / WD versions ............ 21
14
Position ................................................................................... - W version .......................... 21
15
Definition of “type” in the regulations .................................................................................... 21
16
Terminal protection grille ...................................................................................................... 22
17
Preparations for installing the air heater ................................. - WR / WD versions ............ 22
18
Preparations for installing the air heater ................................. - W version .......................... 23
19
Exhaust and intake ducts ........................................................ - WR / WD versions ............ 23
20
Exhaust and intake ducts ........................................................ - W version .......................... 24
21
Connecting more than one unit with a single external timer ................................................. 25
22
Control panel ........................................................................................................................ 26
23
Gas unit ................................................................................................................................ 27
24
Changing the type of gas ...................................................................................................... 28
25
Changing the control equipment ........................................................................................... 31
26
Changing the gas unit’s coils ................................................................................................ 32
27
Changing the pressure switch .............................................................................................. 32
28
Changing the fan thermostat ................................................................................................ 32
29
Changing the safety thermostat ............................................................................................ 32
30
Placement of the electrodes ................................................................................................. 33
31
Changing the flue gas expeller ............................................................................................. 33
32
Changing the fan .................................................................................................................. 33
33
Cleaning the unit ................................................................................................................... 34
34
Control panel ........................................................................................................................ 35
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9. PERIODIC MAINTENANCE
OPERATIONS
9.1 USER INFORMATION
It is recommended to advise the 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
required to test the control and safety devices
and this is why it is important to contact
skilled personnel.
9.2.2 Cleaning the unit
Remove the air heater casing’s right angular
panel by first removing the two screws that hold
it in place (protected by plastic caps) and then
using the point of a screwdriver as a lever to
release the fastening springs in the rear. Remove
the left panel and the front panel by releasing the
snap springs. Remove any dust deposits from
the intake filter and from the air delivery grille.
Also clean the exchanger’s exterior and the fan’s
exterior using a brush or a jet of compressed air.
Remove any dust deposits from the safety and
fan thermostats and from the room thermostat
sensor.
Remove the 6 screws which attach the door to
the combustion chamber. Remove it, making
sure not to damage the seal gasket. Check the
condition of the burner and its parts. Check that
there are no carbon deposits inside the exchanger
Fig. 33
CLEANING THE UNIT
pipe. If deposits are found, look for the causes of
what is likely to be non-efficient combustion. Put
the door back in place, making sure that the
corresponding gasket is in the correct position.
Check that the external intake and exhaust
terminals are in the correct position and that they
are clean.
Check the condition of the electric system and
check the efficiency of the connections.
Carefully replace the components and check
that they operate correctly (fig. 33). Carefully
carry out all the operations described from point
5.1 to point 5.2.2 and, if problems arise, consult
chapter 7 about operating defects.
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