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Tank Removal and Replacement
Tank Replacement:
Tank replacement is indicated if the tank body becomes deformed in any way, as this could cause leakage around the O-ring.
Electrode Replacement:
Electrode disintegration generally starts due to high conductivity water being present in the steam generator. Electrode disin-
tegration sometimes occurs as a result of a combination of the following factors:
1. High voltage (especially 480 and 600 volts);
2. Hard water (in excess of 20 grains/gal.);
3. Any unit with a malfunctioning drain system;
4. Softened water.
If the electrodes begin to disintegrate, the tank may turn black or red, and arcing or flashing may be visible inside the tank
while it is operating.
IF YOU NOTICE EXCESSIVE ARCING, SHUT THE UNIT OFF AND CALL THE FACTORY BEFORE RE-
STARTING UNIT
RECOMMENDED PROCEDURE FOR STEAM GENERATOR TANK AND ELECTRODE REMOVAL, CLEANING, REPAIR AND
REPLACEMENT TANK REMOVAL AND REPLACEMENT - ALL MODELS
1. Drain the tank by pressing the drain button. It may take five minutes for a full tank to completely drain.
2. Once the tank is completely empty, turn off the power at the main disconnect or breaker.
3. Disconnect the steam hose from the top of the steam generator tank by loosening the hose clamp with a screwdriver or
5/16” nut driver. BE CAREFUL! The tank may still be hot to the touch, and some steam may still be condensing in the
tank.
4. Disconnect the power leads at the steam generator with a 7/16” wrench. See wiring diagram for more details.
5. Remove the tank from the cabinet by lifting it out of the drain adaptor. BE CAREFUL! The tank may still contain hot
steam or condensate.
6. It is preferable that you replace the tank with a new or rebuilt unit and take the current tank to the shop for servicing.
7. Install the tank into the EHU by lowering it into the drain adaptor. A small amount of high temperature grease or silicone
lubricant may be used on the drain adaptor o-ring to help it seal properly. After a couple of tank replacements the o-ring
should be replaced as well.
8. Connect power leads, using a 7/16” wrench (three leads for 3-phase units, two for single phase). Refer to the wiring
diagram in your unit for specific information.
9. Connect the steam hose to the top of the steam generator with the hose clamp.
10. Check all wiring connections at the main power, contactor, and control voltage terminal blocks, as well as on the genera-
tor itself. Energize the circuit breaker or main disconnect.
Refer to Start-up Section if you encounter any problems when restarting the unit
