PENN COMMERCIAL REFRIGERATION
TEMPERATURE CONTROLS
MECHANICAL THERMOSTATS
A25
ROD AND TUBE SENSING ELEMENT
A rod and tube type sensing element actuate the switch contacts . Main contacts ( 1 - 2 ) are normally closed , and open when the temperature at the element rises to the dial setpoint . Contacts are re-closed only by operation of the reset lever . The reset lever is “ trip-free ” and cannot be used to block contacts in a closed position .
FEATURES
• Rod and tube type of element
• Adjustable duct mounting flange
• Trip-free manual reset
• Dust-tight Penn switch
APPLICATION
These warm air limit controls “ lock out ” on a temperature increase to the control setpoint . Manual reset is required to re-close the electrical contacts . A typical application is to stop air-conditioning or ventilating fans in the event of excessive return air temperature , as from a fire .
14 - REFRIGERATION
European Products Catalogue 2021