AirKing 5000 Instructions D'installation Et D'opération page 8

Figure 30
SECTION 2. EXTERNAL SWITCH HUMIDIFIER CONTROL
(Figure 31).
To control the humidifier using a separate switch you will
need to purchase an air pressure switch from our parts
& service (1-800-465-7300) or another source. You will
need to set all three DIP switches in the ON position.
Locate the four HUMIDISENSE bypass terminals. Mount
the pressure switch on the hot air duct and connect wires
from the pressure switch's common & normally open
terminals to terminals 3 & 4 on the HUMIDISENSE bypass,
simply strip the end of your wire and push the wire into
the terminals. The humidifier will now operate whenever
the furnace fan runs.
SECTION 3. 24 VAC THERMOSTAT INTERLOCK
(Figure 32).
To control the humidifier using a 24 VAC interlock you will
need to purchase a length of 2 conductor solid copper
thermostat wire (readily available at most hardware
stores). You will need to set all three DIP switches in the
ON position. Refer to your furnace's instruction manual
and locate the furnace's low voltage (24 VAC) thermostat
terminal strip. It is generally located in the lower portion
of the furnace near the blower. On the furnace thermostat
terminal strip there are 5 to 7 low voltage terminals
marked "Y" "W" "G" "C" "R", there may be more or less.
Identify the "C" & "W" terminals, sometimes the "C"
terminal is marked "Com", "24V Com" or B/C, in some
older furnaces with no "C" terminal the furnace chassis or body is the common terminal. The
"W" terminal may be marked "W1", on some heat pumps the first stage heating is the 'Y"
terminal. If you are unsure consult an HVAC professional, we are trying to connect to a 24 VAC
source which cycles ON & OFF with the furnace's heating cycle. Once connection is made at
the furnace connect the other end of the two wires to terminals 1 & 2 on the HUMIDISENSE
bypass terminals. Simply strip the end of your wire and push the wire into the terminals. The
humidifier will now operate whenever the furnace begins heating.
SECTION 4. TRADITIONAL FLOW THROUGH
INSTALLATION (Figure 33).
To complete a "traditional" installation you will need to
purchase a hardwire transformer (120/24 VAC Class 2
500 ma minimum, UL/CSA certified) from our parts &
service (1-800-465-7300) or another source. If you are
replacing an old humidifier and that humidifier used a
transformer wired into the furnace cycling the humidifier
with the furnace's heating cycles you can use the existing
transformer if you confirm it is 24 VAC. If you need to
complete the installation of the transformer then we
recommend the transformer installation be completed by
an HVAC professional due to accessing furnace's 120 VAC
line voltage. The hardwire transformer can be installed
on the furnace's control board accessory terminals, you should be able to locate a bank of
neutral terminals & a hot terminal marked "HUM" or Heat Accessory. The 120 VAC side of the
transformer will connect to these terminals. Once the transformer is installed on the furnace
retrieve the plug in transformer supplied with the unit. The plug in transformer comes complete
with a 12 foot length of wire, cut this wire off at the transformer body and use the wire to
complete the wiring of the humidifier & humidistat as per the previous sections of this book.
To set the humidifier up for this installation you will need to set all three DIP switch in the ON
position. Locate the four HUMIDISENSE bypass terminals and put a jumper wire across terminals
3 & 4. Simply strip the ends of a short pc of wire and push the wire into the terminals.
67285036 Rev. B 11-14
HUMIDISENSE bypass
Figure 31
Figure 32
Figure 33
CONTROLLING THE HUMIDITY LEVEL
AND HUMIDIFIER OPERATION
HUMIDIFIER START UP
When you first plug in the 24 Volt transformer and turn on your humidifier you may hear a click.
This is the power getting to the control's relay. As well if you adjust the humidistat UP or DOWN
and past the sensed humidity level you may hear the control's relay clicking. This is normal as
the humidistat is just an ON/OFF switch, every time the humidistat is turned DOWN the power
is cut to the HUMIDISENSE control.
When starting up the humidifier for operation:
1. Make sure the transformer is plugged in and the water supply is turned on.
2. Turn the humidistat up high, so it is calling for humidity.
3. Turn your furnace thermostat UP so the furnace cycles ON.
4. Once the HUMIDISENSE control senses heat the humidifier will turn ON. You will know because
the green "HUMIDISENSE" LED (Figure 24) on the front of the humidifier will turn ON.
5. After a few moments you should hear water trickling through the drain.
6. After your furnace has completed the heating cycle and shut off (by the thermostat) the
humidifier will cycle OFF. You will know because the green "HUMIDISENSE" LED (Figure 24)
on the front of the humidifier will turn OFF.
CONTROLLING THE HUMIDITY LEVEL
A humidistat is supplied with this humidifier to control the amount of moisture added to the air
in your home. It will sense the relative humidity level in the air and work as the main ON/OFF
switch to control the humidifier, regardless of whether your furnace is on or not.
At the beginning of the heating season it may take sometime to build up the relative humidity
level in your home to the desired level. For the first few weeks turn the humidistat up high
to ensure the humidifier will turn on with every furnace cycle; after you feel that you have
achieved the desired relative humidity level turn the humidistat down until it cycles the
humidifier OFF. The humidifier will then work to maintain the relative humidity at that level.
ACHIEVING AND MAINTAINING A HUMIDITY LEVEL
Outside conditions are the primary factor affecting the humidity level in your home; the colder
it gets outside the less moisture the outside air will have, your home brings in that outside air
and the humidifier will work to add moisture to it. As outside conditions change the humidity
level in your home will change as well. Other factors which will affect humidity levels in the
home include how many air-changes are occurring, the amount of people occupying the
home, air leaks, the use of showers, exhaust fans, HRV's, and the use of a fireplaces or wood
stoves. For more information on achieving a humidity level and or maximizing the output of the
humidifier please see the Maintenance and Trouble Shooting Guide.
SAFELY OPERATING A FURNACE HUMIDIFIER
Proper control of the relative humidity level in the home is key to ensuring good IAQ (Indoor Air
Quality) for your home as well as protecting against moisture damage. Although a relative humidity
environment of 45-50% may be desirable, setting your humidistat at that point when outside
air temperatures are below 30°F can cause condensation on windows and walls. Continued
condensation for extended periods of time may result in structural damage. Use the chart below as
a guide for maximum relative humidity settings at different outdoor air temperatures.
OUT SIDE AIR TEMPERATURE
-20°F / -30°C
-10°F/-25C
0°F/-20°C
+10°F/-10°C
+20°F/05°C
ABOVE +20°F/0°C
If condensation continues to form on windows at these settings reduce the humidistat setting
by successive 5% increments. After each reduction in setting allow 6 hours for equilibrium to
be reached before readjustment.
If condensation is consistently forming on your windows or if the relative humidity level being
sensed by the humidistat is consistently different than the relative humidity level in the home
then you may want to consider changing the location where the humidistat is mounted. If
duct mounted, move the humidistat to a central location, near the furnace thermostat. If after
moving the humidistat the condition persists turn OFF the water supply at the needle valve,
turn the humidistat off and consult a qualified HVAC service person.
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MAXIMUM RELATIVE HUMIDITY SETTING
15%
20%
25%
30%
35%
40%
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