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Installation & Maintenance Manual
9. Start up and Check out of the SD 2000 Humidifier
Startup Checklist:
1. Water and drain lines are connected properly. Drain lines are trapped per Section 3. Fittings are tight.
NOTE: Inlet water pressure must be between 15 and 150 psi. If higher than 150 psi, install regulator.
2. All power connections, including internal ones, have been checked to insure they are tight. Power
supply matches the unit power data label.
3. Wires to the electrodes on top of the cylinder are tight.
4. Steam and condensate hoses are properly installed, and supported to prevent sags.
Hose clamps are tight.
5. Sensors and limits are connected per the instructions.
6. Airflow switch (if used) is wired to close on air flow and open on air loss.
7. Hi-limit duct humidistat is wired to open on humidity rise and is set for 85 to 90%RH.
Startup Procedures:
1.
Turn on water to the humidifier and check for leaks in the piping.
2.
With the humidifier On/Off switch in the OFF position, turn on external power to the humidifier.
3.
Set the humidifier On/Off switch to the ON position.
4.
CDC controllers: Set the humidistat setpoint above the room humidity.
CDP controllers: Set the controller or DDC system to a full call for humidity.
CDH/CDD controllers: Press SEL until the cursor points to SET and then enter a setpoint higher
than the room humidity.
5.
After the HUMIDIFY ON lights up, the FILL will light up 15 seconds later, and the unit will
open the fill valve and begin to fill with water.
Startup with Water Conductivity Higher than 1000 Micromhos: As the humidifier fills with water, it will reach its
required amperage draw (and steam output) before water reaches the top of the cylinder. As the water warms and
begins to boil, its conductivity will increase and the humidifier will periodically open the drain valve to reduce the
amperage and prevent overamping. Once at a boil, the unit will go into normal drain/fill operation.
Startup with Water Conductivity Lower than 1000 Micromhos: In this case, the humidifier will fill completely with
water before reaching the required amperage draw. Initially an E05 prealarm will appear possibly followed by an E02
low output prealarm. The humidifier will allow the water to boil off of the cylinder full probes to eliminate the prealarms
and will then seek to concentrate the minerals in the cylinder until the unit is able to reach full output. This process
may take one or more hours.
Startup with Water Conductivity Lower than 100 Micromhos: When the water conductivity is less than 100
micromhos, there is not enough conductance in the water for the humidifier to reach even low capacity. In this case,
the E05 and E02 prealarms will appear and may be followed quickly by an E07 or E08 alarm. To "jump start" the
humidifier, turn off the power, remove the hose from the top of the cylinder and drop in a teaspoon full of salt (shake
cylinder gently to mix) or two Alka-Seltzer® to raise the water conductivity, and restart the unit. Once the water is
brought to a boil, the unit will be able to automatically take care of maintaining the proper mineral concentration. If the
conductivity is less than 50 micromhos contact the factory for instructions.
Anti-Foaming System: If water in the cylinder starts to foam, the unit may deactivate the power contactor and
activate the fill valve for a short period. If the foam collapses, the unit will then activate a drain cycle and refill. This
can occur repeatedly until the foaming has been eliminated and is a normal routine.
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