INSTALLATION OF STI-9105 & STI-9105-S THERMOSTAT COVER
All specifications and information shown were current as of publication and are subject to change without notice.
9105IS NOV2005
Safety Technology International, Inc.
2306 Airport R terford, Michigan 48327-1209oad • Wa
Phone: 248-673-9898 • Fax: 248-673-1246
Toll Free: 800-888-4784 • E-mail: info@sti-usa.com
Web: www.sti-usa.com
Safety Technology International (Europe)  d.Lt
Unit 49G Pipers Road • Park Farm Industrial Estate • Redditch
Worcestershire • B98 0HU • England • Tel: 44 (0) 1527 520 999
Fax: 44 (0) 1527 501 999 • Freephone: 0800 085 1678 (UK only)
E-mail: info@sti-europe.com • Web: www.sti-europe.com 
INSTALLATION INSTRUCTIONS
1.  Do not remove thermostat. Prior to drilling anchor holes, cover thermostat 
with a damp cloth to prevent dust from penetrating the sensor.
2.  Center frame over existing thermostat. Mark and drill (4) anchor holes using 
a 1/4 in. (6.3mm) drill bit. Insert the (4) anchors and complete installation 
as shown. 
   The (3) tabs on the frame must face upward (View A).NOTE:
3.  Insert  the  (3)  slots  on  the  cover  over tabs  on  the top surface  of  frame.  
Rotate cover downward onto the frame and turn key to lock. Electronic warranty form at www.sti-usa.com/wc14
CLEANING INSTRUCTIONS
To clean cover, remove from wall. Rinse with water to remove abrasive dust and 
dirt. Wash with soap or mild detergent using a soft cloth (DO NOT SCRUB).  Rinse 
once more, then dry with a soft cloth or chamois. To remove grease or wet paint, 
rub gently with a cloth wetted thoroughly with naphtha. Then wash and rinse. DO 
NOT USE RAZOR BLADES.
VIEW A
91051 COVER
9105 FRAME
EXISTING FLUSH
MOUNT THERMOSTAT
KEY (2) PROVIDED
PART OF COVER ASSEMBLY
19033 ANCHOR
(4) PROVIDED
9105 FRAME
CENTER FRAME OVER
EXISTING THERMOSTAT
MARK AND DRILL (4) 1/4 in.
(6.3mm) HOLES AND COMPLETE 
ASSEMBLY AS SHOWN.
91051 COVER AND
LOCK ASSEMBLY
19013 SCREW
(4) PROVIDED
FRAME TABS
THE THREE (3) COVER
TABS MUST FACE UPWARD.
DRILL (4) HOLES .25 in.
(6.3mm) DIAMETER
SEE     ABOVEVIEW A
A
STI-9105 (CLEAR)
STI-9105-S (SMOKE)
SURFACE MOUNT INSTALLATIONS
FOR ADDTIONAL CLEARANCE A 
SUB SPACER KIT MUST BE ORDERED.
SUB-901 2 in. (50mm) DEPTH
SUB-905 1.25 in. (32mm) DEPTH
A
8.2 in.
(207mm)
6.9 in.
(174mm)
6.3 in.
(159mm)
5.6 in.
(141mm)
A
B
B2.6 in.
(65mm)
3.3 in.
(83mm) 4.9 in.
(126mm)
6.2 in.
(159mm) .9 in.
(23mm)
3.2 in.
(81mm)
3.3 in.
(84mm)
6.9 in.
(176mm)