Preferred PF845411, PF845412 Installation, Operation & Maintenance Manual

Preferred

TM

READ AND SAVE THESE INSTRUCTIONS

Fan-Powered Evaporative Humidier

PF845411 & PF845412

Installation, Operation, & Maintenance Manual

READ AND SAVE THESE INSTRUCTIONS

LIRE ET CONSERVER CES INSTRUCTIONS

TABLE OF CONTENTS

1. Warranty Statement .................................................................................................................................3

2. Safety Warnings .......................................................................................................................................3

3. Introduction ..............................................................................................................................................4

3.1 Basic Operation .............................................................................................................................. 4

3.2 Specications Table ........................................................................................................................4

3.3 What’s in the Box ...........................................................................................................................4

4. Installation ................................................................................................................................................ 4

4.1 Clearances ..................................................................................................................................... 4

4.2 Mounting......................................................................................................................................... 4

4.3. Plumbing ........................................................................................................................................6

4.4. Electrical/Wiring ..............................................................................................................................7

4.4.1 Wiring PF845411 (without water saving controls) .............................................................. 7

4.4.2 Wiring PF845412 (with water saving controls) ................................................................... 7

5. Operation .................................................................................................................................................7

5.1 Preliminary Checkout .....................................................................................................................7

5.2 Starting and Stopping the humidier ..............................................................................................7

5.3 End Of Season Decommissioning..................................................................................................8

6. Maintenance/Troubleshooting .................................................................................................................. 8

6.1 Pad Replacement ........................................................................................................................... 8

6.2 Control Board Faults & Reset.........................................................................................................8

6.3 Troubleshooting Chart .................................................................................................................... 9

6.4 Exploded View/Parts List ................................................................................................................10

2 Preferred Products

PreferredTM Model PF845411/PF845412

Installation, Operation, & Maintenance Manual

1. Warranty

This product comes with a ve (5) year limited warranty on parts. The
warranty provides that a replacement will be furnished for any part of
the product that fails in normal use and service during the applicable
warranty period specied, in accordance with the warranty’s terms. The

replacement part is warranted for only the unexpired portion of the origi­nal warranty.
All parts are warranted for a period of FIVE (5) YEARS after the effec­tive date. The effective date is the date of installation if properly docu­mented. Otherwise, it is the date of manufacture plus Sixty (60) months.
STANDARD PROVISIONS AND CONDITIONS
The following terms are common to all of Preferred’s individual product
warranties.
THIS WARRANTY WILL NOT APPLY: a) to defects or malfunctions re­sulting from failure to properly install, operate or maintain the unit in

accordance with the manufacturer’s printed instructions; b) to damage
from abuse, accident, re, ood, and the like; c) to parts used in con­nection with normal maintenance, such as cleaning or replacing air l-

ters; d) to units that are not installed in the United States of America or

Canada; e) to units that are not installed in accordance with applicable

local codes, ordinances and good trade practices; or f) to defects or

damage caused by the use of any attachment, accessory or component
not authorized by Preferred.
SHIPPING COSTS: You will be responsible for the cost of shipping war­ranty replacement parts from our factory to our Preferred distributor and
from the distributor to the location of your product. You also are respon­sible for any shipping cost of returning the failed part to the distributor.

(If in Alaska, Hawaii, or Canada, you also must pay the shipping cost
of returning the failed part to the port of entry into the continental U.S.)
SERVICE LABOR RESPONSIBILITY: This Warranty does not cover

any labor expenses for service, nor for removing or reinstalling parts. All
such expenses are your responsibility, unless a service labor agreement
exists between you and your contractor.

HOW TO OBTAIN WARRANTY PERFORMANCE: You must promptly

report any failure covered by this warranty to the installing contractor or
distributor. Normally, the installing contractor from whom the unit was
purchased will be able to take the necessary corrective action by ob­taining through his Preferred distributor any replacement parts. If the
contractor is not available, simply contact any other local contractor

handling Preferred products.

The name and location of a local contractor can usually be found in your
telephone directory or by contacting a Preferred distributor. If necessary,
the following Preferred ofce can advise you of the nearest Preferred
distributor:
4744 Island Ford Road • Randleman, NC 27317 • www.askpreferred.

com

2. Safety & Warnings

!

DANGER

RISK OF ELECTRIC SHOCK

Before cleaning, servicing, or parts replacement, the unit

must be disconnected from all sources of electricity. Failure to

comply may result in serious injury or death.

!

WARNING

Improper installation, adjustment, alteration, service, or main-

tenance may cause property damage, injury, or death. This

appliance must be installed according to these instructions.

Read these instructions thoroughly before installing or servic-

ing the unit.

!

CAUTION

Read these instructions thoroughly before installing this unit.

Check data label and verify electrical specications agree

with those at the point of installation.

!

WARNING

Failure to install this unit in a position that is level and plumb

may impair the unit’s ability to drain if an overow condition

presents itself. Damage to personal property may also result.

!

WARNING

Installation in freezing conditions can result in unit failure.

Damage to personal property may also result.

HOWEVER, ANY REPLACEMENTS ARE MADE SUBJECT TO VALI­DATION BY Preferred OF IN WARRANTY COVERAGE.

An item to be replaced must be made available in exchange for the

replacement.
MISCELLANEOUS: No one is authorized to make any warranties on
behalf of Preferred. ANY IMPLIED WARRANTIES, INCLUDING MER­CHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, SHALL
NOT EXTEND BEYOND THE APPLICABLE WARRANTY PERIODS
SPECIFIED ABOVE, Preferred SOLE LIABILITY WITH RESPECT TO
DEFECTIVE PARTS SHALL BE AS SET FORTH IN THIS WARRANTY,
AND ANY CLAIMS FOR INCIDENTAL OR CONSEQUENTIAL DAMAG­ES ARE EXPRESSLY EXCLUDED. Some states do not allow limitations
on how long an implied warranty lasts, or for the exclusion of incidental

or consequential damages, so the above limitation or exclusion may not

apply to you.

This Warranty gives you specic legal rights, and you may also have

other rights that vary from state to state.

PreferredTM Model PF845411/PF845412

Preferred Products

3

Installation, Operation, & Maintenance Manual

3. Introduction

The benets of a properly humidied environment (35-50%
Relative Humidity) are many. They include both personal com-

fort as well as the preservation of furniture, draperies, carpets,

wooden oors and cabinets, paintings, pianos, etc. Your home
can be more comfortable at a lower temperature (i.e.: 68° F)
at 30-40% Relative Humidity (RH) than at 71° to 72° F with-

out controlled humidity. Since every degree of temperature

setback represents about 3% of your heating costs, this can
possibly represent a signicant annual savings. During the heat­ing season, cold air inltrates the home and must be heated.

When heated, this air dries out and greatly increases its

capacity to hold more moisture. By using a humidier, a

source of water is provided to satisfy this increased mois-

ture holding capability, rather than having it drawn from our
body surface and the surrounding furnishings in the home.

3.1 Basic Operation

TM

Your Preferred
ates on the principles of evaporation. Water is introduced to
an evaporator pad as warm air is drawn from the duct and cir­cuilated through the pad. The warm air evaporates the water
and the relative humidity of the air increases. Any excess water
is passed to the drain. PF845412 units are equipped with a
water saving controller which acts to minimize the amount of

water that may ow to the drain by adjusting the total water ow
to the humidier.
Setting the humidistat in the recommended range of 30-40%

relative humidity assures automatic humidity control during the

heating season. A lower setting may be necessary to prevent

condensation on windows. An electronic humidistat is supplied
with PF845412 units that can automatically adjust the setpoint
as the outdoor temperature falls.

No action is needed to turn the humidier off for the summer

months. If desired, simply lower the humidistat setpoint.

fan-powered evaporative humidier oper-

Water Supply Connection 1/4” OD Tubing

Drain Water Connection 1/2” ID Tubing

Duct Opening 13.13”W x 14.25”H

Shipping Weight 17 Lbs.

Operating Weight 13 Lbs.

Approvals ETL

4. Installation

Prior to installing this product:

• Read the instructions carefully and completely to ensure

safe operation. Failure to follow the instructions could lead
to damage to the product or cause a hazardous condition.

• Check the ratings given on the product to make sure it is
suitable for your application.

Remember to select a location that is readily accessible for
periodic inspection, cleaning, and service. The following table
indicated the minimum allowable installation clearances. The
following illustrations show some of the possible installation
congurations and where the humider should be installed.
This model must be installed on the discharge air side of the

furnace or heat-pump so that it will operate with the warmest

possible air.

3.2 “What’s In The Box?”

PF845411 PF845412 Description

X X Humidier

X Mech. Humidistat

X Electronic Humidistat

X Transformer

X X Parts Bag

3.3 Unit Specications

Type of Unit Fan-Powered Evaporative

Mounting Location Warm Air Supply Duct

Capacity (GPD) 20.0 GPD @ 140 °F

16.5 GPD @ 120 °F

10.0 GPD @ 100 °F

Water Supply 20-100 PSI

Voltage(Amps) 120VAC(0.8A)

Unit Dimensions 11.6"W x 10.12"D x 18.12"H

4 Preferred Products

Upow - Side Return

Horizontal Flow

PreferredTM Model PF845411/PF845412

Installation, Operation, & Maintenance Manual

!

CAUTION

This humidier should be installed by a qualied service per­son only. Do not connect the unit to the power source until
the installation is complete. A thorough checkout of the unit

installation should be completed before operating the unit.

Failure to follow these directions may void the manufacturer’s
original warranty.

4.2 Mounting

TM

PF845411/PF845412 humidier should be

Upow - Bottom Return

The Preferred
mounted directly to the warm air supply duct of your HVAC sys­tem. Since warm air is required for maximum performace, do

not mount the humidier to the return side of the HVAC duct.
Certain conditions must be met to ensure proper unit operation.

Refer to the following list.

• Ensure that the duct surface is reinforced, if necessary, to
allow the unit to remain level and plumb.

• Ensure that the humidier has adequate clearance to allow

for the removal and replacement of the evaporator pad.

• When installing the humidier in an attic or above a ceiling,
a drain tray must be installed under the unit as a precau-

tionary measure to prevent water damage from occuring if
a leak develops.

• The recommended humidistat range is 30-40% relative hu­midity. If condensation occurs on windows, the humidistat

setting must be lowered to prevent condensation damage.

• DO NOT install the humidier where freezing temperatures

may occur.

• DO NOT install the humidier where it interferes with the

furnace access panels.

• DO NOT install the humidier close to a ue pipe. Intense
heat may damage the humidier.

• DO NOT mount the humidier in the jacket of a cased
coil. It is preferable to mount the humidier immediately

downstream of the cased coil, if present. Ensure that the

humidier does not interfere with the coil ends.

• DO NOT mount the humidier in a furnace jacket.

• DO NOT install on gravity hot air systems.

• DO NOT connect a hot water supply to PreferredTM humidi­ers that are equipped with water saving controls. (Model

PF845412 with Water Saving Controls).

Down-ow

4.1 Recommended Minimum Installation Clearance

Left 3 inches

Right 3 inches

Top 2 inches

Bottom 6 inches

Back 12 inches

PreferredTM Model PF845411/PF845412

!

IMPORTANT

The unit must be installed so that interconnection can be

made to the source of electrical supply without the use of an
extension cord.

1. Tape the mounting template to the duct so that it is at and
the top edge is level.

2. Carefully remove the center of the template by tearing
along the perforated lines. Use a marker to trace on the
duct along the cutout opening.

!

WARNING

Electrical power to the furnace must be disconnected before

proceeding. Serious injury or death may result.

3. Drill the holes marked on the template. Remove the
template from the duct and carefully cut the duct along

the outside edge of the rectangle that was traced by the
marker. Remove any burrs from the cut edge of the sheet

metal taking care not to injure yourself.

Preferred Products

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