Emerson Liebert PEX Series, User Manual

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Chapter 7 System Operation And Maintenance 87
Remove the water level standpipe to drain the water pan. Disconnect the drainage pipe, remove the safety switch of
the water pan, remove the fixing screws at the two ends of the pan, and pull out the water pan. Cleanse the water pan
with water and hard brush, and restore the water pan by reversing the preceding procedures.
Note
Before exercising the corresponding operation, make sure that the power has been cut off so as to avoid the personal injury; and
also ensure that the water in the water pan is close to the room temperature before pouring away the water from the infrared
humidifier water pan.
The autoflush function of the infrared humidifier can prolong the cleansing cycle. However, regular checks and
maintenance are necessary.
Replacing the lamps of the infrared humidifier
The lamp of the infrared humidifier is shown in Figure 7-2.
Infrared lamp
Ceramic socket
Lamp supporting bracket
Fixing screw of
ceramic socket
Fixing screw of wires
Lamp supporting bracket
Infrared humidifier lamp Fixing screw of lamp wires
Figure 7-2 Lamps of infrared humidifier
Follow the following procedures to replace it
:
1. Turn off the power to the main isolation switch.
2. Unplug all the control cables of the infrared humidifier and cut the fixing cable tie binding the infrared humidifier
power cable. In the one-bay system, the plugs of the infrared humidifier are sealed in the niche above the lamp, and
you need to open the cover plate in front of the infrared humidifier before you can reach the plugs. The plugs of the
two-bay system and three-bay system are located at the left side of the infrared humidifier and are accessible directly.
3. After draining the water in the water pan, remove the drain pipe, remove the two fixing screws on both sides of the
infrared humidifier, and then pull out the infrared humidifier.
4. Open the cover plate (for one-bay system, this cover plate has been opened in step 2) to reveal the ceramic socket.
Use a multi-meter to locate the burned lamp.
5. Remove the water pan of the infrared humidifier.
6. Remove the brackets in the middle that support the lamps.
7. Remove the screws that fix the cables of the lamp to be replaced from the ceramic sockets (note to hold the lamp
with hand).
8. Remove the faulty lamp.
9. Install a new lamp.
Note
Do not touch the quartz lamp with bare hands! Greasy sediment and finger prints can seriously shorten the life span of quartz
lamps. Therefore, wear clean cotton gloves during the operation.
10. Restore the infrared humidifier by reversing step 3 ~ step 7.
Liebert.PEX2 Series Air Conditioner User Manual