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
a
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.
© 2020 EnviroAire IAQ
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.