Tjernlund X2D User Manual

TJERNLUND PRODUCTS, INC.

1601 Ninth Street • White Bear Lake, MN 55110-6794
PHONE [phone] • [phone] • FAX [phone]
Visit our web site • www.tjernlund.com

MODEL X2D

REV. C 07/14

INSTALLATION INSTRUCTIONS

OWNER'S INSTRUCTIONS, DO NOT DESTROY

THIS DEVICE MUST BE INSTALLED BY A

QUALIFIED PERSON.

READ INSTRUCTIONS CAREFULLY PRIOR TO

INSTALLATION AND OPERATION OF THE XCHANGER.

Copyright © 2014, Tjernlund Products, Inc. All rights reserved. P/N 8504164

TABLE OF CONTENTS

Descriptions and Specifications.......................................................................................................................................1

Installation Restrictions....................................................................................................................................................1

Cautions ..........................................................................................................................................................................2

Recommended Methods and Patterns of Operation....................................................................................................2-3

Recommended Installation and Termination Locations................................................................................................3-4

X

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Dehumidistat Control Module Installation & Operation ...................................................................................................6

X

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Installation..............................................................................................................................................4-6

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Ladder Diagram ........................................................................................................................................6

Maintenance ....................................................................................................................................................................7

How to Obtain Service & Warranty..................................................................................................................................7

Replacement Parts & Accessories ..................................................................................................................................7

X

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is a trademark of Tjernlund Products, Inc.

Tjernlund Products welcomes your comments and questions. Call us at [phone], [phone], Fax [phone], email us
at [e-mail] or write to: Customer Service, Tjernlund Products, Inc., 1601 Ninth Street, White Bear Lake, MN 55110-6794.

DESCRIPTION

The XCHANGERTMmodel X2D is a dual fan mechanical ventilator capable of exhausting inside air, providing fresh outside air or provid­ing a balanced air exchange. The fans can be independently switched on or off or be easily reversed to provide fresh outside air or
exhaust inside air. The X2D includes a dehumidistat control which operates the fan(s) based on the relative humidity sensed by the
control inside the home. The dehumidistat control includes an “On” setting that will operate the fan(s) continuously or the switch can
be turned “Off” so the fan(s) do not operate during undesireable seasons. The XCHANGERTMcan also be operated by a standard
plug-in timer. Tjernlund’s optional SCP speed control kit is also available if desired.

SPECIFICATIONS

MODEL X2D XCHANGER

1 FAN 2 FANS

Voltage 120 120

Watts 20

Amps 0.3

CFM 90

40

0.6

180

Dehumidistat: 20% - 80% RH Range

Rough-in Wall Opening Dimensions: 12 1/4” x 5 1/4”

GENERAL INFORMATION

Each XCHANGERTMis electrically factory line tested before shipment. After opening carton, Inspect thoroughly for hidden damage.

INSTALLATION RESTRICTIONS

WARNING: Improper installation, adjustment, alterations, service or maintenance can cause injury or property damage. Refer to

this manual. For assistance or additional information consult a qualified installer, service agency or the equipment supplier.

WARNING: Sufficient air is needed for proper combustion and exhausting of gases through the flue (chimney) of fuel burning equip-

ment to prevent backdrafting. Follow the heating equipment manufacturer’s guideline and safety standards such as those
published by the National Fire Protection Association (NFPA), and the American Society for Heating, Refrigeration and
Air Conditioning Engineers (ASHRAE), and the local code authorities.

WARNING: Do not exhaust air from mechanical room unless makeup air is also supplied or equipment in mechanical room is sealed

combustion. Carbon monoxide poisoning may result. Use the DT2-6 6” duct take-off kit so exhaust can be removed from
outside the mechanical room if necessary.

Observe proper location of hood as described on page 3. The X

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fans can be plugged into dehumidistat control module or damage may result.

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must only be installed with the hood on an exterior wall.

Do not discharge intake air onto water pipes or other equipment which may be affected by temperature extremes.

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CAUTIONS

WARNING: Failure to install, maintain and/or operate the XCHANGERTMin accordance with manufacturer’s instructions may result in

conditions that can produce bodily injury and property damage.

Disconnect power supply to fans and/or control when reversing fan direction or servicing the X

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. Failure to do so may

result in personal injury and/or equipment damage.

Make certain the power source is adequate for the X

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requirements. Do not add the XCHANGERTMto a circuit where the

total electrical load is unknown.

XCHANGER DEHUMIDISTAT CONTROL MODULE OPERATION

The XCHANGERTMcontrol module includes an adjustable dehumidistat control which activates the fan(s) if
the relative humidity rises above the selected set-point. It is generally recommended to maintain a Relative
Humidity (RH) below 60% to inhibit mold growth. The dehumidistat can be turned fully clockwise to the ‘on’
position for constant fan(s) operation or it can be turned fully counter-clockwise to ‘off’ during seasons or times
when it is not desired for the X

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fan(s) to run. Each fan can be independently turned on/off by its fan

switch on control module.

STANDARD PLUG-IN TIMER OPERATION

A standard adjustable timer can also be utilized for timed operation of the XCHANGERTMfan(s). Plug timer into
standard outlet and plug XCHANGERTMcontrol module into wall timer. Turn dehumidistat control fully clockwise
to the ‘on’ position. Both outlets in XCHANGERTMcontrol module will be controlled by the wall timer. Each fan
can be independently turned on/off by its fan switch on dehumidistat control module. You can also allow the
dehumidistat control to turn the X

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on during certain times of the day if you use a timer and keep the

dehumidistat control at the desired set-point.

TJERNLUND OPTIONAL SCP SPEED CONTROL OPERATION

Tjernlund’s optional SCP speed control can be used to vary the speed of both XCHANGERTMfans. Plug SCP
speed control into standard outlet and plug XCHANGERTMcontrol module into SCP speed control. Both outlets in
XCHANGERTMcontrol module will be controlled by the SCP speed control. Each fan can be independently
turned on/off by its fan switch on dehumidistat control module.

RECOMMENDED PATTERNS OF OPERATION

The XCHANGERTMX2D model includes a dehumidistat control which can cycle the XCHANGERTMfan(s) automatically based on the rel­ative humidity level of the house or it can be operated based on recommendations below. It is generally recommended to maintain a
Relative Humidity (RH) below 60% to inhibit mold growth.

A standard plug-in wall timer can be programmed based on the lifestyle or needs of the occupants. For example, a family with smok­ers may want to cycle the X

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Another timed method may be to cycle the X

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more frequently than a family of non-smokers.

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during peak usage of exhaust fans, such as bathroom, kitchen, laundry or

utility. Outdoor air should be brought in at these peak times to help balance out pressure inside the house.

The XCHANGERTMcan be cycled on and off at regular intervals to periodically provide fresh air to the home, exhaust stale air or have
one fan bring air in and the other fan exhaust air for a balanced air exchange. It can also be ran like an economizer to bring outside
air in during evening time when it is cooler outside.

HYPOTHETICAL XCHANGER OPERATION BASED ON LIFESTYLE

The example below shows a possible way in which cycling times of the XCHANGERTMmay be determined based on household
occupant lifestyles.

6:00 A.M. to 9:00 A.M. = Outside fresh air should be brought into the house to compensate for morning routines. Bathing, cooking,
laundry and other activities such as smoking necessitate that outside fresh air to be brought in. Depressurization of the house at these
times is common with many exhaust fans running at one time.

9:00 A.M. to 4:00 P.M. = House is normally vacant with occupants at work or school. Cycle X

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on and off for 15 minute

intervals per hour to assure fresh air is supplied to the house.

4:00 P.M. to 8:00 P.M. = Outside fresh air should be brought into the house to compensate for evening routines. Bathing, cooking,
laundry and other activities such as smoking necessitate that outside fresh air to be brought in. Depressurization of the house at these
times is common with many exhaust fans running at one time.

8:00 P.M. to 6:00 A.M. = All members of the household are usually present. Outside fresh air is needed to dilute occupant generated
carbon dioxide during sleeping. Cycle X

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on and off for 15 minute intervals, with occasional 30 minute intervals to assure

fresh air is supplied to house.

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