PRODUCTS AND SERVICES

USEFULL

2009-12-16

Frost protection - frost sensor

The purpose of the frost sensor is to prevent the formation of ice in the air heating coil. If ice is allowed to form, the air heater may freeze and burst, with subsequent water damage. The location of the temperature sensor is of particular importance, as it has to be able to sense when temperature is too low. It can be difficult to determine where in the air heater the temperature is at it's lowest.

The sensor can be placed on the pipeline (1), on the return (2) or on pipe bend (3). The best location depends on the design of the heater. Some heating coils are fitted with a standard sensor connection (4). A frost sensor may be electromechanical or electronic. The electronic frost sensor often has several functions:

A.	To stop the supply air fan at a certain temperature.
B.	To provide a minimum limit for the heating coil temperature when the fan is in operation.
C.	To maintain a constant coil temperature when the fan is non-operational. The outdoor air damper will close when the frost sensor stops the fan.

Frost protection - frost sensor

Ever Yours
NIT

<Back