Component Operation and Maintenance

Replacing the Canister

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.

! WARNING

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.

4.Turn Off the power at the main unit.

5.Remove the cover from the humidifier cabinet.

! CAUTION

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.

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.

Table 11 Humidifier canister part numbers

Part

 

Capacity

Number

Voltage

lb/hr (kg/hr)

 

 

 

136798P1

200-460*

11 (5)

 

 

 

136798P2

380-575

11 (5)

 

 

 

* Can operate on 575V unit with transformer

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

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 top terminal on the canister. It is in the middle of a group of three terminals. The black wire from Terminal #2 on the interface connects to the power terminal farthest from the red terminal/wire. The power wire to this terminal is routed through the current sensing coil.

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Emerson 3000/ITR manual Replacing the Canister, Humidifier canister part numbers, Part Capacity Number Voltage Lb/hr kg/hr
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3000/ITR specifications

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