AutoFlo S2020 - Manual (Page 5)

11. INITIAL START-UP - SEQUENCE OF OPERATION and SERVICE “LED” INDICATORS
12. OPERATING SEQUENCE
Once the Steam Humidifier has been installed and the
water, humidistat and blower interlock connections
completed, the humidifier may be initially started.
A. Flush and Turn "ON" the water supply to the steam
Humidifier.
B. Set the humidistat to a high or "ON" position.
C. Plug the S2000 Humidifier line cord into a 120
VAC, 15 amp source. (240VAC,10amp for S2020).
D. The Green "POWER" LED should blink rapidly
and the drain valve will open momentarily upon initial
start up. The "FILL" LED will illuminate and water
should begin to fill the Water Pan.
E. When the water has reached the probe level the
"FILL" lamp and fill valve will be turned off, and the
"HEATER" LED and heater element will be turned
on. The “POWER” LED will blink slow and steady.
F. Once the water reaches 170 deg. F. the "BLOWER"
LED will illuminate and the system blower should start
up.
G. If the above steps have been successfully completed,
the humidifier is operating properly.
A. POWER: In normal standby mode, when the
humidistat is not calling for humidity and the power
cord is plugged in, the "POWER" LED should be
blinking slowly. If the green "POWER" LED is not
flashing, when there is power to the unit, there has been
a malfunction in the microprocessor circuit.
B. FILL: When the humidistat closes, on a call for
humidity, the "FILL" LED is illuminated, the Solenoid
Valve is open and the water reservoir is filling.
C. HEATER: When the water reaches it's proper level
the valve closes, the "FILL" LED goes out, the
"HEATER" LED is illuminated, and the Heater begins
to heat the water.
NOTE: If the humidifier is unplugged while in
operation and then plugged back in, A rapid
flashing of the “POWER” LED will occur and all
other functions will stop! The unit wants to
perform a water probe test, but cannot perform
this test until the water cools down. Simply wait
until the unit cools down and it will resume
normal operations.
D. BLOWER: When the water in the reservoir reaches
approximately 170 deg. F. the "BLOWER" LED will
be illuminated and the interlock wiring should turn the
system blower on. Depending upon the water and
ambient temperatures, it may take anywhere from four
to twelve minutes for the water to heat to 170 deg. F. If
the humidistat remains closed the "HEATER" and
"BLOWER" LED's will both be illuminated at the same
time and the "POWER" LED will be blinking slowly.
E. The "FILL" LED will illuminate and the water
reservoir will refill at irregular intervals, depending on
the boil off rate. Depending upon the water
temperature, the "BLOWER" LED may remain
illuminated or may go off when the reservoir is filling.
The "HEATER" LED should remain illuminated
unless the humidistat opens or the humidifier enters a
drain cycle or failure mode.
F. DRAIN: This LED will be illuminated when the
microprocessor cycles the humidifier into a
Maintenance Mode. After a fan forced cool down
period, the water is allowed to drain at 140 degrees F.
The drain valve will then close and the fill valve will
open to refill the reservoir and resume normal operation
This mode will last about one hour and the
microprocessor will automatically restart the unit
afterwards, if there is a call for humidity. This drain
cycle will occur once every 8-12hours, to reduce the
mineral concentration in the tank and let the heater cool-
down. That will shed most deposits that have built up
on the heater. NOTE: The "POWER" LED will blink
rapidly during Maintenance mode.
NOTE: A unique feature of the “S” series humidifiers
is called “Fill on Request”. The unit will not refill with
water after a maintenance cycle, unless there is a
demand for humidity from the humidistat. This
ensures that the unit will not sit idle with standing
water, which can stagnate over time.
G. FAILURE LED'S: When service is required,
these LED's will illuminate. If the humidifier enters a
failure mode, it must be manually reset by
disconnecting the power and then reconnecting it.
WATER: This will occur when the reservoir is not
filling up with water, not filling fast enough or the
microprocessor cannot recognize that the water is
touching the probe. Reverse Osmosis water or purified
(distilled/deionized) water sources should be avoided,
unless the final feed water measures at least 25 ppm
conductivity.
HEATER: This will occur if the humidifier is not
boiling off water during the "HEATER" cycle. Water
in the reservoir is not reaching 170 deg. F. temperature,
or the unit has not detected a request for water in a 45
minute steaming time period. Both red LED’s will
illuminate in this condition.
THERMISTOR: This will occur if a short or open is
detected in the temperature probe.
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