1033770 We reserve the right to alter specications
Air heater unit ATD (A, G)
GB
7
Replacing the fan unit
Air heater unit without mixing section or air recirculation
section:
1. Switch off the mains supply to the air heater unit and
lock the safety switch in the OFF position.
2. Disconnect the electrical cable from the junction box.
3. Loosen the securing screws on the contact guard and
remove the fan unit.
4. Install the new fan unit by following the above
instructions in reverse order.
5. Check that the fan impeller is centred in the fan ring
and that the fan rotates in the direction indicated by
the arrow.
6. Start the air heater unit.
Air heater unit with mixing section:
1. Switch off the mains supply to the air heater unit and
lock the safety switch in the OFF position.
2. Dismantle the lter cover and remove the air lter.
3. Disconnect the electrical cable from the junction box.
4. Loosen the securing screws on the contact guard and
remove the fan unit.
5. Install the new fan unit by following the above
instructions in reverse order.
6. Fit the air lter and lter cover.
7. Check that the fan impeller is centred in the fan ring
and that the fan rotates in the direction indicated by
the arrow.
8. Start the air heater unit.
Air heater unit with air recirculation section:
1. Switch off the mains supply to the air heater unit and
lock the safety switch in the OFF position.
2. Dismantle the air recirculation duct, air lter and the
underside of the air recirculation section.
3. Disconnect the electrical cable from the junction box.
4. Loosen the securing screws on the contact guard and
remove the fan unit.
5. Install the new fan unit by following the above
instructions in reverse order.
6. Check that the fan impeller is centred in the fan ring
and that the fan rotates in the direction indicated by
the arrow.
7. Fit the underside of the air recirculation section,
air lter and air recirculation duct.
8. Start the air heater unit.
Risk of freezing
In installations with an ambient temperature of less than
0°C, there is a risk of damage due to freezing if the heat
exchanger becomes too cold. Therefore regularly check:
The air heater unit should be drained of water if the
to blow out any remaining water when the heat exchanger
cannot be fully drained. The air heater unit does not
need to be drained if it is lled with water containing
anti-freeze.
Long-term storage
When the unit is stored for longer than one month,
the following applies:
which it is to be installed.
other mechanical protection to prevent contamination
and water from penetrating and soiling or damaging the
n structure and fan unit.
sealed.
the surface nish must be checked regularly to ensure
that damage does not occur. Touch up any damage to
paintwork.