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5. WATER CONNECTIONS

8. WIRING THE STEAM HUMIDIFIER

6. M OUNTING THE STEAM HUMIDIFIER

7. STEAM OPERATION

A. WATER SUPPLY USING THE SADDLE VALVE

FURNISHED WITH UNIT

A. INSTALLING AND WIRING THE HUMIDISTAT

B. FIELD WIRING

IMPORTANT NOTE:

B. OVERFLOW & DRAIN LINES

Installation instructions for the saddle valve are printed on

the plastic bag containing the saddle valve and its

components. Tap into a 1/2” or 3/4” domestic hot water

line for best results, but a cold water line will do. Avoid

connecting to water lines from a Reverse Osmosis system.

NOTE: Never install the saddle valve on the bottom of the

water pipe. Sediment in the water pipe may clog the

saddle valve. When tightening the hex compression nut,

tighten only enough to assure there are no leaks.

NOTE: Saddle valves do not meet plumbing codes in

some areas. A “T” fitting with a valve may be required to

meet code or, if low water pressure causes frequent water

alerts on the steam humidifier.

NOTE: Do not use any line which is served by a water

softener. If your home has a water softener, make the

water connections to a water line upstream from the water

softener. A water softener is not a demineralizer. It merely

exchanges various hard ions for soft ions in the water.

These soft ions, or minerals, will build up in the

humidifier, causing the need for frequent servicing. The

evaporation of softened water may also produce a white

powder which may be carried into the duct system and,

ultimately, into your home.

Note: Use a water hammer arrester (WH-100) if water

spikes occur during operation.

A temperature sensor is mounted in the water reservoir of the

humidifier. As the water temperature increases to about 170

degrees F, the computer closes a set of blower relay contacts.

When the water cools to about 140 degrees F, the computer

will open the relay contacts.

A humidistat, such as the AutoFlo Models 052000 or

062000, is required to control the Steam Humidifier. The

humidistat may be installed on the wall in the living space

or on the return air duct. NOTE: Continuos fan operation

should be initiated if the humidistat is installed on the

return air duct! Instructions for installation are packaged

with the humidistat.

DO NOT connect any foreign voltage to the “H” terminals

of the humidifier. The unit supplies it’s own 24 volt

control voltage. Simply connect the two “H” terminals

straight to the humidistat terminals.

All wiring must be made in accordance with local codes

and ordinances. DO NOT cut off the grounded plug

and/or hard wire this unit to line voltage.

Figures 5 & 6 describes the suggested interlock wiring

arrangement for HVAC systems. Interlocking may be

performed on heating systems that provide a 24 VAC NEC

Class ll terminal for blower control.

The blower relay (G) circuit is connected to the low voltage

terminals on the humidifier, Figure 5. The relay contacts

must be used to interlock the system blower.

If the Steam Humidifier is removed and

disconnected from the system, the blower

interlock circuit must be restored to it's original

configuration.

Place the humidifier reservoir into the opening in the duct and

secure with eight (8) sheet metal screws.

NOTE: If the ductwork will not support the unit in a level

position with the water pan full of water, the duct-work

must be reinforced. Both steam models weigh

approximately 9 Lbs. empty and approximately 15 Lbs.

full of water.

Because of the high output of this Humidifier, it must not

be operated in ducts or plenums without the blower

operating. The steam humidifier is designed to be

"Dominant" over the Heating-Air Conditioning System

Blower. The "System" blower will be operated by the

humidifier when humidity is required to meet the

humidistat setting.

The use of an overflow line and drain line is always

required.

Use 5/8" ID high temperature tubing, such as automotive

heater hose or dishwasher drain hose. Slip the hose over

the 5/8" drain fitting and use a hose clamp to secure. Use

3/8" high temperature tubing for the automatic drain

connection. Slip the hose over the 3/8" adaptor fitting and

use a hose clamp to secure.

Route the hoses to a suitable drain. DO NOT route the

hoses above the humidifier. Failure to install the drain

lines will result in water leaks during normal operating

conditions.

S2000 & S2020 Typical Wiring

and Blower Interlock Diagram

Furnace

S2000 & S2020 Humidifier

Humidistat

G1 R G2 H H

Typical

Thermostat

G YWR

FIG. 5

Heat & Cool System

1 2 3 4 5 6 7 8 9 10 11

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AutoFlo S2000 Manuale del Proprietario Pagina 3

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