How must bi-metal operated thermostats be installed?

Installing bi-metal operated thermostats tight to a clean surface is essential for ensuring accurate temperature readings and reliable operation. Bi-metal thermostats work based on the principle of differential expansion between two metal strips. When temperature changes occur, the two metals expand at different rates, causing the thermostat to operate. If the thermostat is not tightly affixed to a clean surface, air gaps or contaminants can interfere with the thermal contact, leading to inaccurate readings and poor performance.

In contrast, a loose installation would allow too much movement, which could also affect the operation and accuracy of the thermostat. Placing the thermostat far from any heat source may result in delayed or insufficient response to temperature changes, while installing it with insulation could prevent the thermostat from detecting the environment it is meant to regulate effectively. Therefore, a tight installation on a clean surface ensures the bi-metal thermostat functions correctly and maintains the proper operational parameters.