
P/N 0515258_N U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com
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REVISION HISTORY
REVISION N — Page 3-8 removed sensor wire color
REVISION M
1. Page 1-4 - Replaced image of the display & cable
-Replaced display picture
2. Page 3-1 to 3-5-Remove Safe-NET Controller
Information
3. Page 3-6 -Replaced pictures with coil to ctrl
4. Page 3-7-Change Defrost Frequency from 2 to 3
-Change Temp Termination from 52 to 48
-Change Controller info on first paragraph to controller
-Remove word knob
5. Page 3-8 -Changed controller information
6. Page A-1-Removed selected components -Add
Controller parts
7. Page A-3 -Replaced SNIII with “Ctrl Display” on
291431 & 291432 descriptions
8. Page A-5 -Remove selected information; On Defrost
Data Change Frequency from 12 to 8 and Defrost
Termination from 52 to 48
9. Page A-8/A-9-Replaced diagrams with new revisions
REVISION L
Removed; For USA/CANADA, a Hi-Humidity
Condensate Pan Kit is provided with SHM-3;
Revised Part Numbers, Page A-1 and Condensate
Pan numbers on, Page A-2. Change fuse Amps 30
15, Page A-7; new wiring diagram, Page A-8
REVISION K
NEMA Plug, 2-1; Condensate Pan Note, 2-2; New Part,
A-2; Updated tables, A-5; Updated tables, A-6; Updated
table A-7; Updated Wiring Diagrams, A-8
REVISION J
Revised Parts List, A-2; Revised Wiring Diagram, A-8
A-9; Shipping Weight, Page A-7
REVISION H
Revised Refrigeration Charge, A-5
REVISION G — Note on cover page. Removed model
SHM-4BW, Page 1-2, Added California Prop 65 Warning,
Page 1-2 Updated Night Curtain Instructions, Page 1-5
Added New Parts List, Page A-1
REVISION F — Added Checklists Page 1-7; Added
Warning Page 1-3; Cleaning Coils 4-3; Maintaining
Fluorescent Lights 4-4. Checklist Page 4-5
REVISION E— JULY 2013
1. Included Night Curtain Installation Instructions
Page 1-5 and 1-6
REVISION D— FEBRUARY 2012
1. Changed NEMA plug
2. Removed Remote Case setup instructions
REVISION C— JANUARY 2012
1. Added LED Light Bars
2. Removed Remote Models
3. New Wiring Diagram SHM-3, SHM-4
REVISION B — DECEMBER 2010
1. Revised defrost settings, Page 3-3
2. Changed Defrost Frequency (2); Page 3-7
3. Revised defrost settings; Page A-3
ORIGINAL ISSUE — NOVEMBER 2010
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ANSI Z535.5 DEFINITIONS
• DANGER – Indicate[s] a hazardous
situation which, if not avoided, will
result in death or serious injury.
• WARNING –Indicate[s] a hazardous
situation which, if not avoided, could
result in death or serious injury.
• CAUTION –Indicate[s] a hazardous
situation which, if not avoided, could
result in minor or moderate injury.
• NOTICE – Not related to personal injury –
Indicates[s] situations, which if not avoided,
could result in damage to equipment.