30
HUMIDIFIER STARTUP & OPERATION
PRELIMINARY:
• Pre-startup Checklist completed
yes
no
If no, perform Pre-startup Checklist before going to the starting procedure.
• Startup Checklist completed
yes
no
If no, return to the Startup Checklist before going to the startup procedure.
Unit Serial #: _____________________ No. of Humidi
fi
ers: ______________________________________________
Model #: _________________________________ Voltage: _______ V/ ___ Ph.
Steam Output: _______ lb./hr.
Customer/Job: ___________________________ Address: ______________________________________________
INITIAL STARTUP:
While the external disconnect is in the off position, be sure
that the terminal connectors on the top of the cylinder are
firmly secured and pushed completely down over the pins in
the cylinder.
1. Open all the water supply valves external to the humidifier.
2. Turn external disconnect switch on.
3. Turn on optional circuit breakers if present.
4. For safety, door interlock disconnects power to cylinder(s)
when the door is opened.
The humidifier may be operated for service purposes by pulling
out the knob of the door interlock switch into a fixed, always
on, position.
CAUTION:
HIGH VOLTAGES ARE PRESENT.
5. Turn the “On-Off-Drain” switch to the “On” position. The
blue fill LED will turn on.
6. The Steam Indicator will turn red if any of the basic four
controls on the home page are not ready, indicated with a
red “
X
”.
7. Adjust the controls as necessary to satisfy the
requirements for steam output (see Controls and Home
Page for more information). The humidifier will begin to
operate if all four controls are satisfied.
8. As water slowly fills into the cylinder, the LCD Lb./Hr.
output will begin to increase when water comes in contact
with the electrodes.
9. Water will continue to fill until output is 10% above
setpoint. If water reaches the top of the cylinder before
setpoint is reached, the “High Water Sensor” will be
activated and the fill will close.
10. When starting a new cylinder and fresh water, the fill and
drain solenoid valve may cycle for brief periods until the
water has come to a complete boil.
11. In areas with low conductivity water, full output may not be
reached until the humidifier has conditioned the water by
repeated cycles of filling, boiling, and refilling. The length
of this process will vary but may require several hours, up
to a day, under certain conditions.
AUTOMATIC DRAIN CYCLE:
The circuit board automatically controls the operation of the
drain valve to react to two situations:
Controlling mineral content:
1. When the current reaches 10% above the active setpoint,
the fill solenoid valve closes and water gradually boils away
in the cylinder. Because the quantity of water covering the
electrode surface is being reduced, current slowly falls.
2. An internal timer within the operation algorithm starts
to count seconds when steam output drops to 90% of
setpoint.
3. The timer runs until steam output drops to 90% of setpoint.
4. If steam output drops too rapidly during this transition,
a corrective drain is necessary to reduce the mineral
concentration of the water.
5. If the steam output changes slowly it indicates that mineral
concentration is satisfactory and a corrective drain is not
necessary.
6. Measurements are made during each cycle and a drain
only occurs when necessary thereby maximizing energy
and water usuage efficiency.
Reduced Overcurrent
1. If current to any electrodes in the cylinder reaches more
than 20% above the setpoint, the drain valve will open.
2. Draining water from the cylinder reduces current by
covering less electrode surface.
3. If current is successfully reduced to acceptable levels
normal operation continues.
4. If current is not reduced because of mineral blockage in the
drain lines or solenoid valve, the power contactor will be
opened for approximately 10 seconds while the drain valve
remains open.
5. If current is successfully reduced, normal operation
continues.
6. If current is not reduced the cycle is repeated 8 more
times. If still unsuccessful, the humidifier is placed in an
overcurrent shutdown mode and the “Service Required”
page will be updated accordingly.
