Johnson Controls 8000 User Manual

Johnson Controls

Steam

Unitary Products

Humidifier

Model 8000 Residential Steam Humidifier

Owner’s Manual

Includes Safety & Operating Instructions

and Warranty Information

READ AND SAVE THESE INSTRUCTIONS

TABLE OF CONTENTS

Safety Cautions .............................................. 2

Introduction ................................................. 4

Principles of Operation ........................................ 4

Sequence of Operation ........................................ 5

Installation Options and Effect of Water Characteristics..............6

Operating Modes ............................................. 6

Display Panel ................................................7

Humidifier Control & Operating Instructions........................ 9

Check the Humidifier Operation ................................ 10

Additional Information........................................10

Maintenance ............................................... 10

Limited Warranty ............................................ 12

SAFETY CAUTIONS

CAUTION

ATTENTION INSTALLER

Read this manual before installing. This product must be
installed by qualified HVAC and electrical contractors and in
compliance with local, state, federal, and governing codes.
Improper installation can cause property damage, severe
personal injury, or death as a result of electric shock, burns,
or fire.

Read all cautions and instructions.

Read this manual before performing service or maintenance
procedures on any part of the system. Failure to follow all
cautions and instructions could produce the hazardous
situations described, resulting in property damage, personal
injury, or death.

Failure to follow the instructions in this manual can cause
moisture to accumulate, which can cause damage to structure
and furnishings.

CAUTION

HOT SURFACES AND HOT WATER

This steam humidification system has extremely hot surfaces.
Water in steam canister, steam pipes, and dispersion tube can be
as hot as 212°F (100°C). Discharged steam is not visible. Contact
with hot surfaces, discharged hot water, or air into which steam
has been discharged can cause severe personal injury. To avoid
severe burns, follow procedures in this manual when performing
service or maintenance procedures on any part of the system.

DISCONNECT ELECTRICAL POWER

Disconnect electrical power before installing supply wiring or
performing service or maintenance procedures on any part
of the humidification system. Failure to disconnect electrical
power could result in fire, electrical shock, and other hazardous
conditions. These hazardous conditions could cause property
damage, personal injury, or death.

Contact with energized circuits can cause property damage,
severe personal injury, or death as a result of electrical shock
or fire. Do not remove access panels until electrical power is
disconnected.

Follow the shutdown procedure in this manual before performing
service or maintenance procedures on any part of the system.

ELECTRICAL SHOCK HAZARD

If the humidifier starts up responding to a call for humidity during
maintenance, severe bodily injury or death from electrical
shock could occur. Follow the procedures in this manual before
performing service or maintenance procedures on this humidifier.

EXCESSIVE SUPPLY WATER PRESSURE

Supply water pressure greater than 120 psi may cause the
humidifier to overflow.

SHARP EDGES

Sharp edges may cause serious injury from cuts. Use care when
cutting plenum openings and handling ductwork.

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EXCESS HUMIDITY

Do not set humidity higher than recommended. Condensation
may cause damage.

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Steam

INTRODUCTION

Thank you for your recent steam humidifier purchase. We appreciate
your business and are pleased to add your name to our growing list of
customers. You have invested in the highest quality equipment available.

FIGURE 1 – Fill and Drain System and Canister

Outlet

Your humidifier will require periodic maintenance to assure continued
consistent performance. See page 10.

Please take a few minutes and read this booklet. This will familiarize
you with the benefits you will receive from the humidifier and help you
understand the routine maintenance that will be required.

Replacement Model S1-8044 Steam Canisters are available from
your installing contractor or from most other heating and air
conditioning contractors in your area. Look in the Yellow Pages
under Humidifying Apparatus or Heating & Air Conditioning
Contractors.

PRINCIPLES OF OPERATION

The Steam Humidifier delivers humidity in the form of steam to the
conditioned space via the HVAC system duct or optional Model S1-854Y
Fan Pack. The humidifier generates steam by energizing two electrodes
that extend into a canister of water. Current flowing between the
electrodes causes the water to boil, creating steam. Water is introduced
to the humidifier through a fill valve to a fill cup located in the top of the
cabinet. The fill cup serves as an overflow reservoir and provides an air
gap between the humidifier and water source. The steam canister is filled
from the bottom. The canister is seated in a drain cup assembly which
includes a drain valve. The drain and fill valves work together to maintain
water level in the canister to deliver the rated steam capacity based on
the electrical conductivity of the water and to temper drain water. See
Figure 1 for representation of fill and drain system and canister.

Steam is delivered into the airstream through a dispersion tube mounted
in the HVAC system ductwork. Openings in the dispersion tube are fitted
with “tubelets” which extend into the center of the tube. The design of the
dispersion tube and tubelets distribute steam over a wide area in the duct
and direct any condensed moisture back into the steam hose.

Fill Cup

Overflow

High Water
Level Sensor

Electrodes

Flow Control
Orifice

Canister

Supply

Water

Fill

Drain

Drain Valve

Drain Cup

90-1522

Inlet
Fill Valve

SEQUENCE OF OPERATION

When the Humidifier Control detects humidity below the set point,
and provided the humidifier is turned on and the indoor unit blower is
operating, the internal controller in the humidifier energizes the electrodes
and measures the current flowing through the water between them. The
controller adjusts water level in the canister via a fill valve and a drain
valve to maintain a constant current. The operating water level in the
canister depends on the mineral content of the water which determines
conductivity.

A relay is provided with the humidifier that will allow the control to turn
on the indoor unit blower when a call is made for humidity.

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