Lennox Hcsteam-16, Hcsteam-35 Owner's Manual

E N G I N E E R I N G D A TA

I N D O O R A I R Q U A L I T Y

HCSTEAM

Healthy Climate

Residential Whole-Home Steam Humidier

Bulletin No. 210605

June 2011

MODEL NUMBER IDENTIFICATION

HCSTEAM - 16

HCSTEAM = Healthy Climate

Steam Humidier

FEATURES

WARRANTY

All covered components - limited ve-year warranty in residential applications, one year in non-residential applications.

Refer to the Lennox Equipment Limited Warranty certicate included with the unit for additional details.

APPROVALS

All models are ETL/Intertek listed.

APPLICATIONS

The HCSteam humidier is designed to directly add desired humidity levels to a duct distribution system for improved comfort.

The humidier produces non-pressurized steam which is then used to humidify the air.

Water quality can affect the operation of this unit, the humidier water supply should be untreated potable water, not softened or demineralized.

Unit Type

Nominal Capacity

16 = 15 US Gallons per day 35 = 35 US Gallons per day

The water converted into steam is automatically replaced through an electric ll 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 humidier has been designed for installation on a wall. Since it is an atmospheric steam humidier, 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 humidier:

• Steam nozzle

• Steam hose (10 ft.)

• Steam nozzle condensate drain hose (10 ft.)

• Water ll hose (6 ft.)

• Air proving pressure switch (required)

FEATURES

Steam Generator Cylinder

Humidifier Controller

Power Button

Fill and Tempering Valves

Drain Pump

Water Drain

Water Inlet and Filter Screen

Steam Hose Connection

Condensate Drain Connection

HCSteam - Steam Humidier / 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).

For HCSteam-35 model with low conductivity water conditions (125-350 μS/cm range) order optional Steam Generator Cylinder. See Optional Accessories.

CYLINDER

STEAM

FEATURES

OUTLET

ELECTRODE

CYLINDER

STRAINER

STEAM

11 DRAIN PUMP

SEQUENCE OF OPERATION

The HCSteam steam humidier is an electrode humidier. It produces steam for humidication 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 humidier controller will open the water ll valve (1) and allow water to enter the cylinder. A ow restrictor (4) prevents the unit from lling too quickly or with too much pressure. Water ows up the ll tube (2) and into the ll cup (3). Water then ows over the dam in the ll cup (3), which creates a 1-inch air gap to prevent backow of contaminated water into the feed lines, it then ows through the ll tube (6) and into the bottom of the steam cylinder (5). Any backow or overow of water travels through the overow hose (13) to the drain.

As the water lls the cylinder, it will reach the electrodes (7) and current will begin to ow. As the water continues to ll 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 ll 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 ow 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.

FULL PROBE 9

TEMPERING

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 lter screen (12) in the cylinder helps to prevent mineral debris from blocking the drain pump (11).

In case the humidier 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 ow 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 humidier to operate only when indoor blower is operating.

VALVE

3 FILL CUP

13 OVERFLOW HOSE

2 FILL TUBE

6 FILL TUBE

4 FLOW RESTRICTOR

1 FILL VALVE

HCSteam - Steam Humidier / Page 4

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