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I N D O O R A I R Q U A L I T Y
HCSTEAM
Healthy Climate® Residential Whole-Home Steam Humidifier
ENGINEERING DATA
Bulletin No. 210605
June 2011
MODEL NUMBER IDENTIFICATION
HCSTEAM - 16
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Unit Type |
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Nominal Capacity |
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HCSTEAM = Healthy Climate® Steam Humidifier |
16 |
= 15 US Gallons per day |
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35 |
= 35 US Gallons per day |
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FEATURES
WARRANTY
All covered components - limited five-year warranty in residential applications, one year in non-residential applications.
Refer to the Lennox Equipment Limited Warranty certificate included with the unit for additional details.
APPROVALS
All models are ETL/Intertek listed.
APPLICATIONS
The HCSteam humidifier is designed to directly add desired humidity levels to a duct distribution system for improved comfort.
The humidifier produces non-pressurized steam which is then used to humidify the air.
Water quality can affect the operation of this unit, the humidifier water supply should be untreated potable water, not softened or demineralized.
The water converted into steam is automatically replaced through an electric fill valve. Periodically, based on the water quality, the unit will also drain and add some water to dilute the build−up of minerals in the Steam Generator Cylinder.
The humidifier has been designed for installation on a wall. Since it is an atmospheric steam humidifier, it should be placed close to the point where the steam will be used to minimize the steam hose length and the amount of condensate.
Included with the humidifier:
•Steam nozzle
•Steam hose (10 ft.)
•Steam nozzle condensate drain hose (10 ft.)
•Water fill hose (6 ft.)
•Air proving pressure switch (required)
FEATURES
I
J
BASteam Generator Cylinder
CHumidifier Controller
DPower Button
C
EFill and Tempering Valves
FDrain Pump
GWater Drain
B
DHWater Inlet and Filter Screen
ISteam Hose Connection
JCondensate Drain Connection
E
F
H
G
HCSteam - Steam Humidifier / Page 2
FEATURES
INSTALLATION CONSIDERATIONS
This product must be installed by qualified HVAC and electrical contractors and in compliance with local, state, and federal governing codes.
Humidifier is mounted on a wall and should be located close to the ductwork to minimize the length of the steam hose for maximum performance.
The steam hose length between the humidifier and the ductwork varies depending on the type of installation. See Installation Instructions.
Steam nozzle must be mounted in a supply duct. Nozzle must be installed downstream in a straight section of duct with 3 ft. of straight metal ductwork free of elbows or obstructions.
The preferred installation for the steam hose and nozzle is higher than the humidifier for proper condensate drainage.
Provisions to an open drain for periodic water draining from steam cylinder must be provided.
Air proving switch is required for proper operation and must be mounted close to the humidifier and ductwork to ensure that the blower is operating prior to humidifier operation. Pressure tap must be installed in supply duct. A second tap may be used in the return air duct for differential pressure applications.
Water for humidification should have the following characteristics:
•Water pressure between 20 and 110 psi
•Water temperature between 33 and 104°F
•Flow rate 0.21 GMP (minimum)
•Water hardness less than 400 ppm3 of calcium carbonate (CaCO3)
•Water conductivity from 125 to 1250 microsiemens per centimeter (μS/cm) for HCSteam-16
•1 Water conductivity from 350 to 1250 microsiemens per centimeter (μS/cm) for HCSteam-35
•Absence of organic compounds
DO NOT use with softened water.
Refer to the Installation Instructions for detailed information.
Required Items
1/2 inch water line.
25 Amp dedicated electrical circuit.
1-1/4 inch drain tube extension (plumbed from the humidifier to an open drain, water drain receiver or a condensate pump capable of holding one gallon of 140º F water then plumbed into a 3/4 inch drain line).
1 For HCSteam-35 model with low conductivity water conditions (125-350 μS/cm range) order optional Steam Generator Cylinder. See Optional Accessories.
FEATURES
STEAM |
CYLINDER |
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OUTLET |
FULL PROBE |
3 |
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8 |
9 |
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FILL CUP |
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ELECTRODE |
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13 |
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7 |
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OVERFLOW |
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STEAM |
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HOSE |
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2 |
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CYLINDER |
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FILL TUBE |
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5 |
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6 |
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FILL TUBE |
STRAINER 12
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4 |
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FLOW |
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RESTRICTOR |
11 |
10 |
1 |
DRAIN |
TEMPERING |
FILL VALVE |
PUMP |
VALVE |
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SEQUENCE OF OPERATION
The HCSteam steam humidifier is an electrode humidifier. It produces steam for humidification by passing electric current through metal electrodes (7) immersed in water inside a plastic steam cylinder (5). There are no heating elements.
Steam output is directly proportional to the conductivity of the water, and the amount of electrode immersed in the water.
On a call for humidity, the humidifier controller will open the water fill valve (1) and allow water to enter the cylinder. A flow restrictor (4) prevents the unit from filling too quickly or with too much pressure. Water flows up the fill tube (2) and into the fill cup (3). Water then flows over the dam in the fill cup (3), which creates a 1-inch air gap to prevent backflow of contaminated water into the feed lines, it then flows through the fill tube (6) and into the bottom of the steam cylinder (5). Any backflow or overflow of water travels through the overflow hose (13) to the drain.
As the water fills the cylinder, it will reach the electrodes (7) and current will begin to flow. As the water continues to fill the cylinder, the current will increase. This is monitored by an amperage
transformer connected to one of the power wires and located on the electronic controller. When the desired current is reached, the fill valve closes (1) and the water will begin to warm and produce steam. If the water reaches the cylinder full probe (9) or if current rises too much, the drain pump (11) will be activated to drain away excess water, reducing the water level in the cylinder and reducing the current flow to acceptable levels. Note that, any time the drain pump is activated, the tempering valve (10) will be opened for tempering the hot drained water down to 140ºF in accordance with local and national standards.
Periodically, based on the incoming water conductivity, the unit will run the drain pump (11) to drain and add some water to reduce the mineral concentration. A filter screen (12) in the cylinder helps to prevent mineral debris from blocking the drain pump (11).
In case the humidifier remains powered, but idle for more than 48 hours (without producing steam), the cylinder will automatically be emptied to eliminate stagnant water inside.
If there is no water in the cylinder, there will be no current flow and no steam production. The electrodes do not burn out, but they will eventually become coated with mineral deposits and the cylinder will require replacement.
NOTE - Field installed air proving switch (furnished and required) allows humidifier to operate only when indoor blower is operating.
HCSteam - Steam Humidifier / Page 4
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