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ning them appropriately at the highest and
lowest points of the system. The air must
be vented completely from the system to
ensure proper operation. To check that the
heater is vented completely, blow compres-
sed air in the pipes.
CONDENSATE DRAIN
In the case of use of the coil section with
cooling water, it will be necessary to connect
the condensate drain fitting on the bottom
of the tray of the coil section. The section is
equipped with: 2 x 16 mm fittings
.
NOTE!
All liquids potentially harmful to the environment
must be collected in suitable containers and then
sent to an authorised disposal or recycling facility.
Never lift the heater before draining all the liquid.
Regularly inspect the connections to verify that
none of the screws or threads subject to loads
are damaged. Check that the fin structure is
clean and undamaged.
CLEANING
The accumulation of dust on the surfaces of
the heater reduces the air flow and slows
heat transmission. It is, therefore, impor-
tant to keep the coils clean following one of
the procedures below (or a combination of
these):
• Cleaning with a vacuum cleaner.
• Cleaning with compressed air.
• Cleaning with steam.
• Washing or rinsing with water. In the case
of hot surfaces covered with grease, first
spray the entire heater with a ecological
solvent at low pressure. After 10-12 minu-
tes, wash with water at high pressure.
Cleaning should be done in the oppo-
site direction to normal air flow
.
NOTE!
It is important to keep the nozzle perpendicular
to the surface of the fins and at a minimum
distance of 150 mm to prevent damage to the
fins. Deformed fins can be straightened with a
special comb. Make sure to remove all traces of
solvent on the body of the pipe with fins in order
to prevent the build-up of dust. After cleaning,
remove all dust deposits before starting the fan.
MAINTENANCE OF THE
WATER COIL
HYDRAULIC CONNECTIONS
FOR WATER COIL
The connections for the pipes of the heater
should not be forced to bear the entire
weight of the outer pipes. The pipes should
not be subject to forces due to the thermal
expansion. The connections must be pro-
tected against shock, external loads and
mechanical stresses.
Mechanical loads and shocks may damage
the manifold.
ANTIFREEZE PROTECTION
In case of freezing risk and consequent
damage to the pipes, one of the two fol-
lowing measures must be taken:
• Top up the coil with a suitable anti-freeze.
The coil capacity is stated on the rating
plate affixed to the side of the coil connec
-
tions.
• Drain all the water from the pipes and coil.
Do not mount the plugs on the coil before
topping the system up again with water.
Blow compressed air in the coil to make
sure it is completely free of water.
HIGH TEMPERATURES
During installation and maintenance of a coil
that uses water as a medium and in which
the temperature of the water can exceed
100°C, use
extreme caution when opening
the vent valves and shut-off valves of the
system. The escape of hot water or steam
can cause serious personal injury. SABIANA
accepts no responsibility for the connection
of the heater to the heating system or for
any damage due to the design, installation or
incorrect maintenance of this system. Pipes,
valves etc. must be appropriately sized
taking account of the pressure drop and cor-
rect operation, and not the size of the coil
connections.
FILLING,VENTING AND DRAINAGE
The connecting pipes of the water coil are
not equipped with a vent valve and a drain
valve.
The vent and drain valves should be fitted
during installation of the system, positio-
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