Tjernlund SD140 Sure Dry Shower Drying System 8504188 - Manual (Page 2)

Always disconnect the Sure Dry™ Fan or timer from its power source before installation and servicing.
IMPORTANT: An in depth investigation of the wall layout is required prior to installation. Avoid a
stud wall section that is a path for plumbing supply lines, drains and vents. Avoid a stud wall sec-
tion that is insulated or being used as a return air duct for a forced air system. Pick the best location
based on clear routing of the supply duct, sound transfer concerns, electrical supply routing and
air drying paths. Make sure the wall cavity is at least 10 1/2" wide between inside stud edges.
• The Sure Dry™ may not be used to exhaust hazardous or explosive materials or vapors.
• The Sure Dry™ may not be installed in a ceiling.
• The Sure Dry™ may not be installed in an outside wall.
• The Sure Dry™ may not be installed in a wall rated as a “fire wall.”
• The Sure Dry™ may not be used to move air from one floor (story) to another floor.
• The Sure Dry™ may not be used in a window.
Disrupt power at circuit breaker to outlets & switches from the electrical power source you will be working
with.
When manually sawing through sheetrock stop if you detect the saw blade coming in contact with any wiring or
plumbing. Investigate further to determine if it is possible to safely continue to use this wall cavity space. Switch to
another stud wall cavity if necessary.
BEFORE YOU START:
Determine the stud wall section that you want to use to mount the SD140 in. IMPORTANT: Wall studs must be
spaced a minimum of 10 1/2” between inside edges, (See Diagram A). NOTE: If attempting to install the SD140
with an existing shower and not performing a complete remodel or retrofit, mark inside edges of studs the Sure
Dry™ will be installed between and verify there is at least 10 1/2” between the inside edges. Slide a stud finder
down the wall between the studs to verify the stud wall cavity is completely open, (See Diagram B).
TOOLS REQUIRED
Sheetrock Saw Drill Tin Snips Phillips & Straight Screwdrivers Level Tape Measure Utility Knife or Scissors Wire Stripper
REMODEL OR NEW CONSTRUCTION INSTALLATION
1. When installing the SD140, locate possible installation locations by examining the inside and outside shower areas for non-obstructed
wall stud cavities. Avoid wall stud cavities that have plumbing or electrical wires within them. Pick the best location based on clear
routing of flex duct, sound transfer concerns, electrical supply routing. Make sure the wall cavity is at least 10 1/2" wide between
inside stud edges, (See Figures A & B).
2. On the shower side of the wall before any materials have been fastened to the studs, define where the shower air Supply Grille will
be located. Make sure the height of the Shower Grille is above the highest water level obtainable in the shower. Mount the gray &
white Supply Elbow between 2 studs within the wall cavity chosen in Step 1. Make sure the oval end of elbow points up. The use of
an additional wall framing piece (2 x 4 or 2 x 6) or is required to solidly mount elbow. Mount Supply Elbow above maximum water
level, (See Figure C).
3. In the wall cavity where the supply elbow has been mounted, define a location for the Blower. This location should be towards the top
of the wall cavity but no closer than 3" from the ceiling on the other side of the wall. Once a target location has been determined, find
the center point between the studs and poke a small hole thru the wall and verify the location is acceptable from the other side of the
wall, (See Figure D).
FIGURE A
IMPORTANT: Wall cavity between studs
must be completely open between Blower
and Supply Elbow. Studs must have a
minimum of 10 1/2” between inside edges.
FIGURE B
Wall studs must
have a minimum
of 10 1/2”
between them.
BLOWER
OPENING
IMPORTANT:
Wall cavity
between studs
must be com-
pletely open
between
Blower and
Supply Elbow
FIGURE D FIGURE E FIGURE C
PICK A STUD WALL CAVITY THAT IS
UNOBSTRUCTED AND ALSO CON-
FIRM BLOWER INTAKE LOCATION IS
ACCEPTABLE ON WALL OPPOSITE
SHOWER. POKE A SMALL HOLE
THRU WALL TO DETERMINE IF
BLOWER LOCATION IS SUITABLE.