Specification Sheet

The performance specifications are nominal and conform to acceptable industry standards. For applications at conditions beyond these specifications, consult the local Johnson Controls office.
Johnson Controls shall not be liable for damages resulting from misapplication or misuse of its products. © 2018 Johnson Controls.
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G Series Thermostat and Humidistat Guards Catalog Page
Description
The G Series Guards protect thermostats and
humidistats from damage, vandalism,
tampering, and unauthorized adjustment.
They are available in plastic, cast aluminum,
or wire construction.
Features
• clear plastic guards have tumbler-type key
locks
• GRD10A-608 and -609 include a mounting
ring for mounting to a wall or flat surface
• plastic baseplate and plastic mounting ring
available
• the baseplate mounts to a flat surface or to
a single or double outlet box
• the mounting ring permits mounting over a
thermostat or humidistat already installed
Applications
Ideal for locations where locked protection is
required, such as schools, warehouses,
churches, hospitals, or offices.
Selection Chart
Repair Parts
Replacement key KEY12A-600 (set of two) is available.
Product Code
Number
Description Thermostat or Humidistat Series Number
T22 T25 T26 T28
No Switches
T91
GRD10-1R Wire guard only  —  — 
GRD10A-600 Wire guard and baseplate  —  — 
GRD10A-601 Aluminum guard and baseplate  — 
GRD10A-606 Plastic guard with baseplate — 
GRD10A-608 Plastic guard with baseplate, mounting ring 
GRD10A-609 Plastic guard with baseplate, mounting ring 
GRD10A-601
Cast Aluminum Guard
GRD10A-608
Large Clear Plastic Guard
GRD10A-609
Rectangular Clear Plastic
Guard
GRD10-1R
Wire Guard
Code No. LIT-1922145
Issued May 2018