(©January, 2008)
Air Technology Systems, Inc.
BNB Ultrasonic Humidifier Installation, Operation & Maintenance Manual
5-7
5.4 Common Repairs/Parts Replacement
When parts are replaced, the following sections “5.4.1 Prepara-
tion for Repairs” and “5.4.2 Re-assembling” must be observed.
5.4.1 Preparation for Repairs (Removal of Water Tank)
1) Stop the humidifier, set the power supply circuit breaker (main
switch) to OFF and close the water supply valve.
2) Remove the drain pipe plug and drain the water tank. After
draining, re-install the plug securely.
3) Remove the connection of the water supply. Be sure to use
two wrenches to prevent the body of the compression fitting on
the humidifier from turning.
Photo 10
4) Remove the screw-on connector for the main cord and
operating cord.
Photo 11
5) Remove the mist guide cover mounting screws (4 Pcs.
knurled) on the side of the humidifier.
6) Loosen the screws (1 Pc. or 2 Pcs.) on the front of the
humidifier and remove the mist guide cover.
7) Remove the air flow guide (water tank cover) mounting screws
(2 Pcs.) and remove the air flow guide.
Photo 12
8) Remove the control box cover mounting screws (4 Pcs.).
Photo 13
9) Remove the control box cover, remove the fan lead wire
bundling band, and remove the lead wire connecting terminals.
Photo 14
10) Loosen the water tank mounting screws (2 Pcs.) at the
lower part on the side of the humidifier.
Photo 15
11) Remove the water tank portion. Take the water tank to a
convenient place for working before replacing parts.
5.4.2 Re-assembling
1) Before re-assembling the humidifier, confirm there is no water
leakage by pouring water into the tank.
2) When re-assembling after replacing parts, inspect the interior
and check the following points:
All the screws must be securely tightened.
All the lead wires must be correctly and securely connected.
(Special attention should be paid to the fan lead wires.)
All the plates, boards and relays must be free from discoloration,
deformation and deterioration.
Electrical wires must not be damaged.
3) After re-assembly is completed, supply water and power and
operate the unit. Check to see that normal nebulizing mist is
visible from all the mist blow tubes and that there is no water
leakage.
