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Wiring
WIRING TO 24V. HUMIDIFIER
JUMPER
CONSTANT
24 VOLTS
24 VOLTS
SWITCHED
W/ FURNACE
OPERATION
WIRING TO FAN POWER HUMIDIFIER
JUMPER
CONSTANT
YELLOW
24 VOLTS
YELLOW
Note:
1. Manufacturer installed jumper is required for HVAC blower control
2. Separate sensor leads from line voltage wires by at least 4 inches;
sensor wire length 200 feet max.
Testing the System
1. Re-assemble system and check all connections.
2. Restore power to the HVAC system.
3. Start HVAC system by raising thermostat setting.
4. Check to see that GFX4 display is on.
5. Set to TEST MODE by pressing "DROP"and
"THERMOMETER" together for 5 seconds. The
relay will close and the "+" will ash for 2 minutes
or press a key to set to OFF MODE.
6. Set to OFF mode to verify humidi er operation ceases.
7. The GFX4 will stay in OFF Mode unless set to
Manual or Automatic mode. See below.
Operating Modes
Press any button to light the display. Press the "DROP"
button to select the Operating Mode, O , Manual or Auto.
O Mode
The Humidi er is turned o .
Manual Mode
The GFX4 will work to maintain the single
humidity selected. You can set your desired
humidity level by pressing "UP" or "DOWN".
The humidi er will turn ON or OFF according
to your manual setting. The humidi er will
operate when the measured relative
humidity falls more than 1% below the set point until
the measured relative humidity is 1% above the set
point. When the humidi er is operating, the "+" will
display. Humidity may have to be lowered when
weather is colder or if condensation is expected. The
settings table to the right or a similar table may be used
to compensate for cold outside temperatures.
Auto Mode
The GFX4 will automatically raise the humidity as the outdoor temperature increases. This
provides the highest possible humidity. The GFX4 will automatically lower the humidity as
temperatures drop. This minimizes the risk of condensation on cold surfaces like windows.
The Auto Humidity Index Set Point may be changed from1(low) to 10 (high) by pressing "UP"
or "DOWN". The Humidity Index is based on the outdoor temperature and indoor humidity.
The humidi er will switch ON/OFF according to the calculated auto humidity index set point.
When the humidi er is operating, the "+" will display. Lower Index settings are for older
homes with less insulation and poor vapor barriers. Higher Index settings are for newer
homes with complete vapor barriers, energy e cient windows and high R value insulation.
See chart at right.
1-2
Older than 1950, no vapor barrier, little insulation.
3-4
Built 1950-1965, no vapor barrier, R6 insulation.
5-6
Built 1965-1975, craft vapor barrier, R11 insulation.
7-8
Built 1980-1990, craft vapor barrier, R19, energy e cient windows.
9-10
Built after 1990, poly vapor barrier, R38 insulation, foam exterior cladding,
energy e cient windows.
If condensation is seen, reduce index by 2 until condensation stops. The level bars indicate
the humidity index; one bar for two index points.
WIRING TO ELITE STEAM HUMIDIFIERS
JUMPER
24 VOLT HUMIDIFIER
SOLENOID VALVE OR
DRUM MOTOR
R C G
120 VOLTS
HVAC EQUIPMENT
SWITCHED
W/ FURNACE
OPERATION
PUSH
5 SEC.
"DROP"
"UP"
"DOWN"
Outdoor
Temperature
-20°F
-29°C
-10°F
-23°C
0°F
-18°C
+10°F
-12°C
+20°F
- 7°C
+30°F
- 1°C
N2
GND
N1
AB
AB
GND
IN
NO
C
NC
C
NO
GND
24V
STEAM HUMIDIFIER
Humidi er Runs Continuously
BLINK !
If humidi er operates while HVAC system is o , check that power to humidi er is
switched with HVAC operation.
Humidi er Does Not Run
Check wiring to/from GFX4 control. Verify 18-30 VAC. Use "TEST MODE" .
Humidi er Runs When Air Conditioning Is On
If this is undesirable, change wiring to be powered only in heating periods.
Humidity Not High Enough
Check humidi er, water supply, electrical connections.
HVAC operating time too short.
Humidi er undersized (Review humidity load and humidi er capacity).
Humidity Too High
Wiring fault. Set GFX4 to "OFF" mode and check that operation ceases.
Outdoor sensor is being kept warm. Check that sensor is not buried in snow
on south or west side of house, warmed by sun, or is too far inside of air intake.
Limited Warranty
This humidistat is warranted to the consumer against defects in materials and
workmanship for a period of one year from the date of installation. Defective
parts will be repaired without charge except for removal, reinstallation and
transportation costs. To obtain repair service under this limited warranty, the
consumer must send the defective part to the manufacturer.
There are no express warranties covering this humidistat other than set forth
above. The implied warranties of merchantability and tness for a particular
Suggested
purpose are limited in duration to one year. The manufacturer assumes no
Setting
liability in connection with the installation or use of this product, except as
15%
stated in this limited warranty. The manufacturer will in no event be liable for
20%
incidental or consequential damages.
25%
Any questions pertaining to this limited warranty should be addressed to the
30%
manufacturer. USA: The manufacturer has elected not to make available the
35%
informal dispute settlement mechanism which is speci ed in the
40%
Magnuson-Moss Warranty Act.
Auto Mode Target Humidity
Humidity
Index
-20
1
0
2
3
3
6
4
9
5
12
6
15
7
18
8
21
9
24
10
27
O set Mode
To change the calibration of the GFX4, an o set may be entered to
the Humidity, Indoor Temperature or Outdoor Temperature
displays. Press both "UP" and "DOWN" buttons together to enter
OFFSET mode. The word "OFFSET" and "RH" will display. Press "UP"
or "DOWN" to change the Humidity calibration. Press both "UP"
and "DOWN" buttons together again to change the Indoor
Temperature o set. Press both "UP" and "DOWN" buttons together
again to change the Outdoor Temperature o set.
Display a Temperature
Press the "THERMOMETER" button to move between displaying
indoor and outdoor temperature. "Tree" symbol will be displayed
when showing outdoor temperature. "House" symbol will be
displayed when showing indoor temperature. To change between
°F and °C units, press the " °F/°C " button.
Trouble Shooting
"HOUSE" Flashing The indoor temperature sensor has failed.
"TREE" Flashing The outdoor temperature sensor has failed.
Humidi er Turns On and O Repeatedly
Check that input voltage is between 18 and 30 VAC and not
intermittent.
Check that humidistat is NOT mounted on supply duct,
downstream of humidi er, or closer to humidi er than 12 inches.
Make sure that Outdoor Sensor wiring is not close to line voltage
wires.
Outdoor Temperature °F
-10
0
10
20
5
10
15
20
8
13
18
23
11
16
21
26
14
19
24
29
17
22
27
32
20
25
30
35
23
28
33
38
26
31
36
41
29
34
39
44
32
37
42
47
FORM GFX4-11 Rev. B
30
40
50
25
30
35
28
33
38
31
36
41
34
39
44
37
42
47
40
45
50
43
48
53
46
51
56
49
54
59
52
57
62
9805-100-001
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