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Room thermostat (optional)
B
IMPORTANT: THE ROOM THERMOSTAT MUST HAVE VOLTAGE-FREE
CONTACTS. CONNECTING 230 V TO THE ROOM THERMOSTAT TERMI-
NALS WILL PERMANENTLY DAMAGE THE ELECTRONIC BOARD.
When connecting time controls or a timer, do not take the power supply for
these devices from their breaking contacts Their power supply must be by
means of direct connection from the mains or with batteries, depending on the
kind of device.
Accessing the electrical terminal block
Undo the two screws "A" located on the top part of the control panel and remove the
cover.
fig. 22 - Accessing the terminal block
3.6 Connection to the flue
The unit must be connected to a flue designed and built in compliance with the current
regulations. The pipe between the boiler and flue must be made from material suitable
for the purpose, i.e. heat and corrosion resistant. Ensure the seal at the joints.
3.7 Condensate drain connection
The unit's condensate drain must be connected to a suitable disposal system. Comply
with the specific local and national regulations on discharging condensate water into the
waste water disposal system. For boilers not using exclusively low-sulphur gas oil (S
content<50 ppm) make sure to provide for a suitable condensate neutralisation device.
Connect the condensate drain pipe located at the back of the boiler (ref. A - fig. 23) to
the neutralisation device connected to the waste water system. The condensate dis-
charge pipes must be acidproof and installed sloping at least 3° towards the drain, with-
out any constrictions and obstructions.
B
IMPORTANT. Fill the trap with water before starting the unit.
Periodically check the water in the trap.
fig. 23 - Condensate drain
44
EN
ATLAS D CONDENS UNIT
3.8 Conversion of boiler with burner to sealed chamber (only version ATLAS D 32
CONDENS UNIT)
B
ATTENTION: The connection with separate pipes indicated here can be done
only and exclusively with the sealed chamber kit.
A kit is available on request for converting the boiler with burner to sealed chamber. This
conversion allows the air necessary for combustion to be sucked directly from the out-
side.
For installation, refer to the instructions contained in the kit.
After installation, the unit becomes a "C type" with sealed chamber and forced draught.
The air inlet and fume outlet must be connected to one of the extraction/suction systems
specified below. The unit is approved to operate with all the Cxy flue configurations given
in these instructions. Some configurations may be expressly limited or not permitted by
law, standards or local regulations. Before proceeding with installation, check and care-
fully observe the above instructions. Also, comply with the provisions on the positioning
of wall and/or roof terminals and the minimum distances from windows, walls, ventilation
openings, etc.
Only use ducts in stainless steel, suitable for use with oil-fired condensing heat
A
generators.
Connection with separate pipes
fig. 25 - Examples of connection with separate pipes (
Before installation, make sure the maximum permissible length has not been exceeded,
by means of a simple calculation:
1.
Completely establish the layout of the system of split flues, including accessories
and outlet terminals.
2.
Consult the table 3 and identify the losses in m
ponent, according to the installation position.
3.
Check that the sum total of losses is less than or equal to the maximum permissible
length in table 2.
Table. 2 - Separate ducts
Model
Max. permissible length
cod. 3541B625 - Rev. 03 - 03/2015
fig. 24 - Sealed chamber conversion kit
(equivalent metres) of every com-
eq
ATLAS D 32 CONDENS UNIT
= Air /
= Fumes)
Separate ducts
25 m
eq
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