Emerson 3000/ITR Manuel D’Utilisation

Over a period of operation, the humidifier electrodes become coated with mineral solids. This coating 

insulates the electrodes and decreases the current flow. To maintain humidifier capacity, the water 

level slowly rises to expose fresh electrode. Eventually, the entire electrode becomes coated and the 

water level reaches the top. At this point, the canister full alarm is activated and the output begins to 

fall. When this happens, it is necessary to replace the full canister.
To replace the canister:
1. Turn the humidifier Off by lowering the humidity setpoint below the ambient humidity level. 

Record the original setpoint.

2. Place the RUN/DRAIN switch in the DRAIN position to drain the water from the canister.
3. Return the RUN/DRAIN switch to the RUN position after the canister has drained.

4. Turn Off the power at the main unit.
5. Remove the cover from the humidifier cabinet.

6. Locate the power wires to the steam canister. They are connected to the canister with 1/4" quick 

connects. Make note of the wiring configuration before removing any wires. Refer to the schematic 

on the unit. Slide the rubber boot back to expose the connections. Remove the three power wires 

and the two canister full wires. Do not loosen the screws that secure the electrodes.

7. Loosen the steam outlet hose clamp and slide the steam hose away from the canister top fitting.
8. The canister is now ready to be removed. Pull the canister straight up and out of the cabinet 

toward you.

9. Replace the canister with the part indicated in Table 11. 

10. Replace the canister by reversing the above procedure. Make special note of the following:

Risk of electric shock. Can cause injury or death.
To avoid a shock hazard, all power to the unit must be disconnected before proceeding with 

the canister replacement procedure.

Risk of contact with hot surfaces. Can cause injury.
The canister and steam hose may be hot. Allow sufficient time for them to cool before working 

within the unit cabinet. Use extreme caution and wear protective gloves and arm protection 

when working on or near the canister or steam hose.

136798P1

200-460*

11 (5)

136798P2

380-575

11 (5)

* Can operate on 575V unit with transformer

NOTE
When replacing the canister:
1. Make sure the two “O” rings are lubricated and properly seated on the bottom neck.
2. Always check the fill and drain solenoids for proper operation.

NOTE
When replacing the wiring, connect the red wire from Terminal #1 on the interface to the red