Preventive Maintenance & Calibration Frequency Suggestions for Thermostats

Calibration Chart

Thermostat TypeAnnualSemi-AnnualExtra*
Single Temp X   X
Day-Nite X   X
Hate-Cool   X X
School-Stats
Single and Day-Nite
X   X
 *VIP Areas, Operating, Clean Rooms, Etc.

Frequency** for Maintenance Material Replacement

Thermostat TypeFilterRestrictorNozzle & PinSupply & Exhaust ValveHumidity Element
Pneumatic Stats A A      
School-Stats A     5Y  

** Frequencies listed pre-suppose a clean air supply.
Frequency: A=Annually, 2Y=every two years, 5Y=every five years.