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TABLE 1 – Water Quality Guidelines
Conductivity (uS/cm)
of water connected to
humidifier
0-125
125-300
300-500
500-640
640-840
840-1250
above 1250
Note: If softened water is not available, or if non-softened water will be used in the humidifier, use this table to estimate the conductivity of the
water delivered to the humidifier . Take the appropriate actions as necessary . Using softened water is generally acceptable unless the water is
extremely conductive . The conductivity of softened water is usually slightly higher than the conductivity of the hard water entering the softener .
For softened water, use a conductivity test together with the table above if there is a concern that the water may be too conductive . The
manufacturer is not responsible for failures due to misapplication of the product using water that is unsuitable for this technology .
SEQUENCE OF OPERATION
When the humidifier control detects RH below the set point, and provided the humidifier is turned on and the HVAC system blower is operating,
the controller in the humidifier energizes the electrodes and measures the current flowing through the water . The controller adjusts water level
in the canister via a fill valve and a drain valve to maintain current at either 11 .5 or 16 .0 amps . The operating water level in the canister depends
on the mineral content of the water which determines conductivity .
If the blower activation relay is installed, the humidifier control will turn on the HVAC blower when a call for humidity is made .
SPECIFICATIONS & DIMENSIONS
This humidifier is able to produce steam at various capacities depending on the voltage and current applied . The unit can be wired to use an
input voltage of 120, 208 or 240 Volts and input amperage can be set to 11 .5 or 16 .0 amps by changing a dip switch on the control circuit board
(see the ELECTRICAL POWER WIRING & SHUT OFF SWITCH section on page 13) . Configure the unit appropriately for the application (see
Table 2 for capacity specifications) .
TABLE 2 – Humidifier Capacities and Recommended Home Sizes
Amperage
11 .5
16 .0
* Assumes 8 ft ceiling height, adjust as necessary for higher ceilings. For homes with multiple furnaces/air handlers a humidifier should be installed on each.
Humidifier Shipping Weight: 28 lbs
Humidifier Operating Weight: 23 lbs**
** As minerals precipitate, unit weight can increase to approximately 30 lbs.
4
Estimated grains/gallon
(prior to any water
softening)
0-3
3-9
9-15
15-20
20-25
25-36
36
Maximum steam capacity
Voltage
(gal/day)
120V
11 .5
208V
20 .5
240V
23 .3
120V
16 .0
208V
30 .0
240V
34 .6
Hardness (prior to any
Canister behavior
water softening)
Humidifier does not
Naturally Soft
Naturally Soft
Slightly Hard
Optimal performance
Moderately Hard
Hard
Shortened canister life due
Very Hard
Canister performance
Extremely Hard
Maximum recommended home size in ft
Tight
2,500 sq ft
4,500 sq ft
3,500 sq ft
6,000 sq ft
Installation not recommended .
function .
Power with 208/240VAC, use
Long start up time .
constant fan to decrease time
to reach full capacity .
Use either hard or softened
range .
Use softened water .
to mineral build up .
Installation not recommended .
degrades quickly .
Average
1,500 sq ft
2,500 sq ft
2,000 sq ft
4,000 sq ft
Solution
water .
*
2
Loose
1,000 sq ft
1,500 sq ft
1,500 sq ft
2,500 sq ft
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