Humidifier Operation - Air King 5000 Installation & Operating Instructions Manual

120V
electric
source
24V
transformer
Figure 23
STEP #6: TESTING THE INSTALLATION
If you have not already replace the front cover of the humidifier and secure in place using the
plastic thumb screw.
1. Make sure all water connections are secure and do not leak. Also, ensure that all
components are secure and installed correctly.
2. Plug in the 24-Volt transformer into a constant 120-Volt power source (an outlet which
cannot be shut off via a wall switch).
3. Turn up the humidistat to the maximum setting 50% +. This ensures the humidistat is
calling for humidity. If the humidistat is not calling for humidity at the BEGINNING of the
furnace cycle the humidifier will not turn on, if you turn up the humidistat in the middle of
the furnace cycle the humidifier will wait until the NEXT cycle to turn on.
4. Turn on the power to your furnace and turn up the thermostat so that the furnace cycles on
in heating mode.
OPERATING TIP: Most furnaces will take a few minutes to allow heat to build up before the
furnace fan will run. The "HUMIDISENSE" control contained in the humidifier will wait until it
senses your furnace fan blowing hot air. If only your furnace fan is running the unit should not
turn on. The "HUMIDISENSE" will not turn the humidifier on until is senses a temperature rise of
4°C and the air temperature is over 30°C. This ensures the efficient use of water.
5. Depending on your furnace type the unit should turn on within approx 60 seconds of the
furnace entering the HEATING cycle. You will know because the green "HUMIDISENSE" LED
on the front of unit will turn on (Figure 24). If the unit does not turn on refer to the trouble
shooting section in the Maintenance Guide.
Green Humidisense
LED
Figure 24
6. Once the unit has been running for approx 3-4 minutes you will see a small amount of
water trickling out of the drain tube.
OPERATING TIP: In order to ensure efficient water use, ensure water will not blow off the
evaporator, and to protect the humidifier's solenoid valve there is an orifice fitting installed on
the outlet of the solenoid valve and a water inlet filter installed on the inlet of the solenoid valve.
If the unit has turned on and the green light is on but no water is getting to the evaporator pad,
check that the inlet filter or orifice fitting is not plugged (refer to maintenance guide).
7. After about 5 minutes of running turn your thermostat down so the furnace cycles off. IT
IS IMPORTANT TO ALLOW THE FURNACE TO CYCLE OFF VIA THE THERMOSTAT AND NOT
THE MAIN FURNACE SWITCH, AS ALL FURNACES WILL RUN A COOL DOWN TO ALLOW HEAT
TO CIRCULATE OUT OF THE FURNACE HEATING CHAMBER. The humidifier will sense the
temperature drop and shut off (this will occur depending on your furnace, from 60 seconds
before the furnace shuts of to 60 seconds after the furnace shuts off.) You will know the
humidifier has shut off because the green "HUMIDISENSE" LED on the front of the humidifier
will shut off (Figure. 24). If the humidifier is not cycling properly refer to the HUMIDIFIER
OPERATION section below to adjust temperature settings or select another control method.
OPERATING TIP: Most furnaces will take anywhere from 30 seconds to 2 minutes to complete
a off cycle. First the furnace will sense that the thermostat is satisfied then the furnace burner
will shut off. The furnace fan will continue to run (the amount of time depending on how your
furnace is set up) this allows the heat to circulate out of the furnace heating chamber and
assures efficient use of heating fuel.

HUMIDIFIER OPERATION

HUMIDIFIER CYCLING CONTROL
It is necessary to control the ON and OFF cycles of a flow through style humidifier because
they allow water to flow to the drain and running the humidifier continuously will consume
67285036 Rev. B 11-14
Humidifier
Humidistat
www.airkinglimited.com
a lot of water. You want the humidifier to cycle based on % Relative Humidity, this is
accomplished by using the provided humidistat. As well you want the humidifier to cycle
based on furnace heating cycles, this is accomplished using the HUMIDISENSE control.
The HUMIDISENSE control is a temperature and time based control designed to cycle the
humidifier ON and OFF in sequence with your furnace's heating cycles. As there are many
different furnace styles the HUMIDISENSE control has 4 different temperature settings. Refer
to Section 1 for a brief explanation of these.
Depending on your heating system it maybe necessary to bypass the temperature activation
feature and use an external switch (sold separately) ie Air Pressure or Air Flow Switch mounted
on your furnace's ducting to sense air flow during furnace heating cycles, activating the furnace
humidifier. Refer to Section 2 for an explanation of how to set this up.
If the HUMIDISENSE temperature control or the external switch are not an option you may
choose to interlock the humidifier to the furnace heating cycles via the furnace's 24 VAC
thermostat terminals using two conductor thermostat wire (sold separately). Refer to Section 3
for an explanation of how to set this up.
If above three options do not meet your needs you can complete a traditional flow through
humidifier installation. A different transformer (sold separately) is required and an HVAC professional
is recommended. Refer to Section 4 for an explanation of how to set this up.
Dip switch
Figure 25
SECTION 1. DIP SWITCH TEMPERATURE SETTINGS.
FACTORY SETTING (1 & 3 OFF, 2 ON) (Figure 26).
Humidifier ON - Temperature rise of 4°C in one minute & a
temperature greater than 30'C.
Humidifier OFF - Temperature drop of 2°C in one minute & a
temperature less then 45°C.
OPTIONAL SETTING #1 (1 & 2 ON, 3 OFF) (Figure 27).
Humidifier ON - Temperature rise of 4°C in one minute & a
temperature greater than 30'C.
Humidifier OFF - Temperature drop of 2°C in one minute & a
temperature less then 35'C.
OPTIONAL SETTING #2 (1 ON, 2 & 3 OFF) (Figure 28).
Humidifier ON - Temperature rise of 4°C in one minute & a
temperature greater than 30°C.
Humidifier OFF - Temperature drop of 2°C in one minute & a
temperature less then 55°C.
OPTIONAL SETTING #3 (1 2 & 3 OFF) (Figure 29).
Humidifier ON - Temperature rise of 4°C in one minute & a
temperature greater than 30°C
Humidifier OFF - Temperature drop of 2°C in one minute & a
temperature less then 65°C.
To Change the HUMIDISENSE temperature settings the humidifier must
be energized but not running. If the humidifier has not shut off after a
furnace cycle, turn down the furnace's thermostat. Unplug the humidifier
for a few minutes and allow the humidifier to cool down. Then plug the
humidifier back in, turn the humidifier's humidistat all the way up. Now
the furnace should be OFF and the humidifier NOT running.
Change the DIP switch to the desired setting. After you have
changed the DIP switch setting unplug the humidifier for one
minute. Plug the humidifier back in and wait another minute. The
HUMIDISENSE temperature setting is now changed (Figure 30).
Figure 26
Figure 27
Figure 28
Figure 29
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