EnviroAire Power EA-755 User manual

Power EA-755 Humidier

Power Model EA-755 Humidiﬁer

Owner’s Manual

INTRODUCTION

Thank you for your recent EnviroAire IAQ Power EA-755

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.

EnviroAire IAQ manufactures whole-home indoor air quality

products and is a recognized leader in the indoor air quality

industry.

Your humidiﬁer will require periodic maintenance to assure

continued performance.

Please take a few minutes and read this manual. This will

familiarize you with the beneﬁts you will receive from the

equipment you just purchased and help you understand the

routine maintenance that will be required.

If you have questions regarding your humidiﬁer, your may

reach out to us at www.enviroaireiaq.com/contact-us, or

contact the EnviroAire IAQ certiﬁed partner who installed

your system.

WARNING

120 volts may cause injury from electrical

shock. Disconnect power and shut off water

supply before servicing.

CAUTION

Sudden operation may cause personal injury

or property damage. Turn the EnviroAire IAQ

humidiﬁer control to “OFF” or lowest setting

before servicing.

EnviroAire IAQ Replacement Water Panel evaporators are

available from your installing contractor. Use the dealer

locator in our web site (www.enviroaireiaq.com/ﬁnd-a-pro).

Purchase only EnviroAire IAQ Water Panels to maintain

peak performance.

PRINCIPLE OF OPERATION

With your purchase of this humidiﬁcation system, you have

invested in a humidiﬁer that operates on the evaporative

principle – nature’s own way of adding moisture – providing

optimum relative humidity (RH) throughout the heating

season. It is very possible that you have questions concerning

your new humidiﬁer – questions on what it can do for you,

and what you should do to receive maximum beneﬁts from it.

Nature, in producing an invigorating comfortable spring

day, combines just the right temperature and the right

amount of moisture. EnviroAire IAQ humidiﬁers employ the

same principle, with reﬁnements, to give you the optimum

RH for maximum allowable comfort all winter long.

The important considerations in the evaluation of a

humidiﬁer are precise control, sufﬁcient capacity, trouble-

free performance and minimum maintenance. The operating

principle of your EnviroAire IAQ humidiﬁer provides all of

these advantages. Here, brieﬂy, is the method: the EnviroAire

IAQ humidiﬁer is installed to operate in conjunction with the

heating, ventilating, air conditioning equipment (HVAC)

blower. When the EnviroAire IAQ Humidiﬁer Control calls

for humidity and the blower motor is operating, water ﬂows

to the distribution tray located at the top of the humidiﬁer.

The water is uniformly distributed across the width of the tray

nd through a scientiﬁcally designed system of outlets. It ﬂows

by gravity over the water panel evaporator, the heart of the

humidiﬁer. Dry, hot air is moved through the moisture-laden

water panel evaporator where natural evaporation takes

place. The now-humidiﬁed air carrying moisture in vapor form

(nature’s own way) is circulated throughout the home. Power

model EA-755 has a built-in fan which draws air through the

water panel.

The correct water ﬂow is determined by an oriﬁce

provided with each drain type humidiﬁer. When

the humidiﬁer is operating, there will be a small,

steady stream of water to drain, which ﬂushes

away most of the trouble-

causing minerals.

Do not use the saddle valve to regulate the water

ﬂow. It is designed to be completely open or closed.

The minerals and solid residue not trapped by the replaceable

water panel evaporator are ﬂushed down the drain in the

EA-755 model. This is the most effective and least expensive

method to dispose of trouble-causing minerals. The drain

also eliminates the problems caused by stagnant water.

PRINCIPLE OF OPERATION CONT.

Trouble-free performance and minimum maintenance

are assured by the design features of the EnviroAire IAQ

humidiﬁer. All humidiﬁer housing parts that come in contact

with water are non-metal and will never rust or corrode.

Neither heat nor water will affect them under normal

operating conditions.

The Water Panel evaporator, designed especially for uniform,

high evaporation, and the Scale Control Insert (which encases

the water panel) effectively traps mineral deposits which are

often the cause of damage to working parts in ordinary

humidiﬁers. The Water Panel evaporator is the heart

of the humidiﬁer and must be in good condition to

assure high capacity trouble-free performance. It

should be changed at least annually.

The distribution tray incorporates a synthetic fabric liner that is

designed to deliver water uniformly over the entire top surface

of the water panel evaporator, provided the humidiﬁer is

mounted level. It is normal for some mineral deposits to form

in the distribution tray as it dries out between humidiﬁcation

cycles. These deposits can actually help distribute water

in the tray, but if they block the openings, they should be

removed as described in the “Periodic Maintenance” section

of this manual.

Your Digital Humidiﬁer Control works in conjunction with

your HVAC system to control the operation of the humidiﬁer.

The control senses indoor RH and outdoor temperature and

automatically adjusts the operation time of the humidiﬁer to

provide the optimum humidity level in the home.

The Automatic Control can be set to turn on the HVAC blower

when humidity is required. Plumbing the humidiﬁer to hot

water is required for this mode of operation.

The digital readout on the control displays the RH level inside

the cold air return duct. RH is a measure of the amount of

moisture in the air as a percentage of what the air can hold.

Warm air can hold more moisture than cold air can.

The control has lights which indicate humidiﬁer operation,

when the Water panel needs to be replaced and when

service is required. See “Operating Instructions” for more

information.

There are many humidiﬁers on the market. They all add

moisture…with varying degrees of efﬁciency. None,

however, offer the features, design, and performance

incorporated into your new EnviroAire IAQ humidiﬁer.

OPERATING INSTRUCTIONS

The Digital Humidiﬁer Control offers two modes of operation,

Automatic or Manual. An explanation of both modes follows.

(See the following page: Figure A for Automatic Mode.

Figure B for Manual Mode.)

When in the Automatic Mode, this system offers the following

beneﬁts:

• You will always receive the optimum amount

of humidity so that your home and its furnishings

are always protected from the damaging effects

of excess condensation or low humidity during the

heating season. The Control automatically adjusts your

home’s RH based on the outdoor temperature, increasing the

time maximum comfort is maintained.

• Simple operation with few adjustments. The

Control eliminates the need to manually adjust the control

when outdoor temperature changes. It also eliminates the need

to turn the dial setting to “OFF” during the summer season.

Call Dealer for Service: The red light indicates that

the humidiﬁer is not operating normally and that service is

required.

Change Water Panel: The yellow light indicates that it is

time to change the Water Panel in the humidiﬁer.

Humidiﬁer On: The green light indicates that the humidiﬁer

is operating normally.

DIGITAL CONTROL INDICATOR LIGHTS

Turn “Blower Activation Switch” to “ON” to allow the

humidiﬁer control to activate the HVAC fan for maximum

humidiﬁcation. For this setting the EA-755 must be connected

to hot water.

BLOWER ACTIVATION

If the HVAC system has been idle for one hour, the humidiﬁer

control will activate the HVAC system fan to sample the air for

3 minutes. If the RH is lower than the set point, the humidiﬁer

control will activate the humidiﬁer and keep the fan running.

The humidiﬁer will continue to operate for 2 hours or until the

humidiﬁcation set point is reached.

If the RH set point has not been reached by the end of a call

for heat, the control will continue to operate the humidiﬁer

and the HVAC fan until the humidiﬁcation set point is reached

or 2 hours have elapsed.

When the “Blower Activation Switch” is in the “OFF“ position,

the humidiﬁer control will only operate the humidiﬁer if

humidity is required and the HVAC system fan is operating

or the HVAC system is producing heat.

NOTE: If used in conjunction with a 8570 Communicating

Thermostat, and the blower activation feature is desired, DO

NOT wire the A B communication terminals.

Your EnviroAire IAQ Humidiﬁer Control is installed in the

cold air return duct. During the ﬁrst heating season, your

Humidiﬁer Control needs to be set initially to match your

home’s condition. Please follow these steps when adjusting

your control (refer to Figure A).

AUTOMATIC MODE

1. Turn the dial setting knob to “5”, which is within the normal

range. During the next 24-48 hours it may be necessary

to adjust the dial for more or less humidity, depending on

your personal comfort and home’s requirements. Refer to

TABLE 3 – Operation Guide on the following page.

2. During the coldest portion of the ﬁrst heating season,

minor adjustments may be necessary. This is dependent upon

your home’s construction. Refer to TABLE 3 – Operation

Guide on the following page.

The RH in your home will now be accurately controlled to meet

your needs and should not need further adjustment during future

heating seasons. Make note of the dial setting in the event you

temporarily move the knob to “OFF” when performing annual

maintenance of your EnviroAire IAQ humidiﬁer.

When installed in the Manual Mode (see Figure B

internal switch in “MAN” position and “M” in the display),

it is important to anticipate a drop in outdoor temperature

and reduce the setting accordingly to avoid excessive

condensation. For example, with an outdoor temperature of

20°F the correct setting will be 35% RH. If the temperature is

expected to fall to 0°F, then merely reduce the setting to 25%

several hours prior to the temperature change.

MANUAL MODE

See Table 1 for the recommended settings. These settings,

which are based on years of research, represent a

compromise between RH levels that would be most desirable

for comfort and humidity levels that are suitable for protection

of your home and to avoid condensation on your windows.

For example, a wintertime indoor RH of 50% may be

considered ideal for comfort, but unfortunately, it probably

would result in condensation, which can cause damage to

your home. Observing the recommended RH levels on your

Humidiﬁer Control is an important safeguard. Condensation

of water on the inside surface of windows in the form of

fogging or frost is usually an indication of too much humidity.

This same condensation can occur in other areas in your

home, possibly resulting in damage.

TABLE 1 - OUTDOOR TEMPERATURE/INDOOR RELATIVE HUMIDITY

Outside Temperature RECOMMENDED RH

WATER PANEL CHANGE INDICATOR

The control keeps track of humidiﬁer operation time. The yellow

“Change Water Panel” light ﬂashes after a preset amount of

running time has elapsed. This running time is preset by the

installer based on the humidiﬁer model and water hardness.

Refer to the Annual Maintenance section for instructions

on changing the Water Panel or call your heating and air

conditioning dealer for service. After the Water Panel is

replaced, turn the Control knob to the “Test/Reset” position

until the green “Humidiﬁer ON” light ﬂashes, to reset the water

panel change timer.

TEST/RESET

The Test/Reset feature allows the humidiﬁer operation to be

checked even if there is no call for humidity. See “Check the

Humidiﬁer Operation.”

ADDITIONAL INFORMATION

Your humidiﬁer is a precision system that will accurately

maintain the RH in your home. For every 2°F change in outdoor

temperature, the Digital Humidiﬁer Control will automatically

adjust the indoor RH by 1%.

The Digital Humidiﬁer Control will accurately control the

humidity in your home to a maximum of 45% RH.

The RH Values in Table 2 are targets based on outdoor

temperature and the Digital Humidiﬁer Control setting. The

actual RH may vary due to conditions in the home (cooking,

showering, etc.).

TABLE 2 - % RELATIVE HUMIDITY GUIDE

Outdoor Temperature (°F)

TABLE 3 - OPERATION GUIDE

Condition Solution

OPERATING INSTRUCTIONS

Your EnviroAire IAQ humidiﬁer is controlled by a Manual

Humidiﬁer Control (see Figure C). The Manual Humidiﬁer

Control is installed either in the cold air return duct or on

an interior wall of the home. With the Manual Humidiﬁer

Control, it is important to anticipate a drop in outdoor

temperature and reduce the setting accordingly to avoid

excessive condensation, just as with the Digital Humidiﬁer

Control installed in Manual Mode.

To determine the indoor RH, slowly turn the knob clockwise

and counterclockwise and listen for 2 clicks. The indoor RH

is within the range of the 2 clicks.

CHECK HUMIDIFIER OPERATION

Set the knob to “Test/Reset”, make sure that the water saddle

valve is open and that there is electricity to the humidiﬁer.

The HVAC fan must be running for the humidiﬁer to function.

Note: Turning the knob to “Test/Reset” resets the “Change

Water Panel” timer. The humidiﬁer will only operate for 1

minute in test mode. Reduce the Humidiﬁer Control setting

to the recommended inside RH, depending on the outside

temperature. DO NOT LEAVE IN TEST MODE AS

HUMIDIFIER WILL NOT OPERATE.

DIGITAL HUMIDIFIER CONTROL

Set the knob to the highest setting, make sure that the

water saddle valve is open and that there is electricity to

the humidiﬁer. The HVAC system must be operating for the

humidiﬁer to function. Conﬁrm that the solenoid valve is

energized and water is ﬂowing into the humidiﬁer. Return

control knob to desired setting.

MANUAL HUMIDIFIER CONTROL

ADDITIONAL INFORMATION

Be sure to keep ﬁreplace dampers closed when not in use.

They provide an excellent escape route for heat, as well as

humidity.

On occasion, indoor moisture producing activities such as

clothes drying, cooking, showers, etc., may raise the RH

level higher than it should be, even though the EnviroAire

IAQ humidiﬁer is not operating. Telltale indications are

condensation or frost on cold surfaces such as windows,

doors, walls, etc. If such condensation persists for several

hours, your home should be ventilated to dissipate the

potentially damaging excess moisture.

EFFECT OF WATER CHARACTERISTICS

Your humidiﬁer is designed to operate using hot, cold, hard

or mechanically softened water.

Water contains varying amounts of minerals. The residue

remaining as a result of hard water evaporation is primarily

calcium and magnesium components and is usually quite

hard, scaly, and dense. Residue from softened water tends to

be soft and ﬂuffy and has a greater volume than hard water

deposits. In either case, the service life of a Water Panel

evaporator will be the same. The Water Panel evaporator

should be changed at least once a year. In the drain-

equipped models, most of the mineral solids are ﬂushed

down the drain.

Hot supply water, 140°F maximum, is recommended with

drain type humidiﬁers for increasing capacity and is required

for heat pump and air handler applications.

WARNING

RISK OF SCALDING. Water temperature over 125˚F

can cause severe burns and scald instantly. Shut off the

hot water supply before disconnecting or tapping into

any hot water supply line.

ANNUAL MAINTENANCE

For best performance, we recommend that you replace the

Water Panel evaporator in your EnviroAire IAQ humidiﬁer

at least annually.

The “Change Water panel” indicator light (Digital Control

only) will blink when it is time to change your Water panel.

• Call the installer of your EnviroAire IAQ humidiﬁer. This

contact information is often found on your equipment.

• Call your heating and air conditioning dealer.

PERIODIC MAINTENANCE

NOTE: Periodic inspection and preventative maintenance

of your total heating system is important for efﬁcient and

safe operation. Your heating contractor can service your

humidiﬁer when he services the HVAC system.

The distribution tray above the water panel should be

inspected annually and cleaned of excess mineral deposits.

• Use our pro locator at: www.enviroaireiaq.com/ﬁnd-a pro

• If none of the above is successful and you still need

information, please feel free to contact us at: www.

enviroaireiaq.com/contact-us

If your humidiﬁer is equipped with a Digital Humidiﬁer

Control with water panel change indicator, after replacing

the water panel, turn the control knob to the “Test/Reset”

position until the “Humidiﬁer On” light blinks to reset its

timer. (Blower must be operating and HVAC calling for heat.)

Be sure to turn the control knob back to it’s original setting. If

the “Humidiﬁer On” light continues to blink, your humidiﬁer

is in Test mode. DO NOT LEAVE THE CONTROL IN TEST

MODE OR HUMIDIFIER WILL NOT OPERATE.

REQUIRED MAINTENANCE

WARNING

ELECTRICAL SHOCK HAZARD. Can cause injury or

death. Disconnect all electrical power supplies before

servicing. Turn the Humidiﬁer Control to “OFF” or the

lowest setting before servicing.

1. Note Humidiﬁer Control setting and turn dial to the “OFF”

position.

2. Disconnect electrical power and turn off water supply.

3. Unlatch humidiﬁer front cover assembly (1) from base

assembly (2) at the bottom of the cover, lift, and set aside.

4. Pull out the Water Panel evaporative assembly (3) by

grasping at the top and tipping out.

5. Unsnap the distribution tray (4) from the scale control

insert (7). Lightly scrape out or brush off any mineral deposits,

being careful not to stretch or loosen the synthetic fabric

liner. Soaking the tray in vinegar or a lime-removing agent

is helpful when trying to remove stubborn mineral deposits.

6. Slide the water panel evaporator (6) out from the scale

control insert (7) and dispose of the water panel. Clean the

scale control insert of mineral deposits. Replace the water

panel evaporator (Stock No. 35) with a new EnviroAire IAQ

water panel. Slide the water panel evaporator back into the

scale control insert with the colored spot up and snap the

distribution tray (4) back into place.

7. Inspect the plastic feed tube by gently ﬂexing it and

looking for cracks or signs of wear. Replace tube if it is

cracked, brittle, or has been damaged.

8. Reinstall the water panel evaporative assembly (3) into

the humidiﬁer by ﬁtting its drain into the round receptacle at

the base of the humidiﬁer. Push the assembly in at the top

between the retaining ribs that hold the assembly in place in

a vertical position.

9. Remove the drain line (8) from the bottom of the humidiﬁer.

If applicable, ﬂex it to loosen any mineral deposits or

blockage. Then ﬂush it with water under pressure. If it does

not clear, replace it. Slip drain line back onto the drain

ﬁtting. Make sure the drain line has a constant downward

slope and is not ﬂattened or blocked.

10. Reinstall front cover assembly (1) by hooking at the top

of the base assembly (2) and latching at the bottom.

11. Reconnect electrical power (9) and turn on the water

supply.

12. Check system operation:

(Automatic or Manual mode) Check system operation and

reset Change water panel indicator by setting the knob

to “Test/Reset”. With HVAC blower operating and HVAC

calling for heat, humidiﬁer will operate for one minute. DO

NOT LEAVE IN TEST MODE AS HUMIDIFIER WILL

NOT OPERATE.

13. Set Humidiﬁer Control to its original position.

NOTE: The motor is permanently lubricated and does not

need to be oiled.

LIMITED WARRANTY

Your EnviroAire IAQ humidiﬁer unit is expressly warranted

for ﬁve (5) years from date of installation to be free from

defects in materials or workmanship except, however, for the

disposable water panel which will have to be replaced from

time to time depending upon the amount of use.

EnviroAire IAQ’s exclusive obligation under this warranty

shall be to supply, without charge, a replacement for any

part of the humidiﬁer which is found to be defective within

such ﬁve (5) year period and which is returned not later

than thirty (30) days after said ﬁve (5) year period by you to

your original supplier, together with the model number and

installation date of the humidiﬁer.

THIS WARRANTY SHALL NOT OBLIGATE ENVIROAIRE

IAQ FOR ANY LABOR COSTS AND SHALL NOT APPLY TO

DEFECTS IN WORKMANSHIP OR MATERIALS FURNISHED

BY YOUR INSTALLER AS CONTRASTED TO DEFECTS IN

THE HUMIDIFIER ITSELF.

IMPLIED WARRANTIES OF MERCHANTABILITY OR

FITNESS FOR A PARTICULAR PURPOSE SHALL BE LIMITED

IN DURATION TO THE AFORESAID FIVE YEAR PERIOD.

ENVIROAIRE IAQ’S LIABILITY FOR INCIDENTAL OR

CONSEQUENTIAL DAMAGES, OTHER THAN DAMAGES

FOR PERSONAL INJURIES, RESULTING FROM ANY BREACH

OF THE AFORESAID IMPLIED WARRANTIES OR THE ABOVE

LIMITED WARRANTY IS EXPRESSLY EXCLUDED. THIS LIMITED

WARRANTY IS VOID IF DEFECT(S) RESULT FROM FAILURE

TO HAVE THIS UNIT INSTALLED BY A QUALIFIED HEATING

AND AIR CONDITIONING CONTRACTOR. IF THE

LIMITED WARRANTY IS VOID DUE TO FAILURE TO USE A

QUALIFIED CONTRACTOR, ALL DISCLAIMERS OF IMPLIED

WARRANTIES SHALL BE EFFECTIVE UPON INSTALLATION.

Some states do not allow limitations on how long an implied

warranty lasts or the exclusion or limitation of incidental or

consequential damages so the above exclusion or limitations

may not apply to you.

This warranty gives you speciﬁc legal rights and you may

also have other rights which vary from state to state.

ANNUAL SUMMER SHUTDOWN

Digital Humidiﬁer Control in Automatic Mode (see Figure A

Page 4): No adjustment is necessary.

Digital Humidiﬁer Control in Manual Mode (see Figure B

Page 4: Set the knob to the “OFF” position.

Manual Humidiﬁer Control (see Figure C Page 6): Set the

knob to the “OFF” position.

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