1.When connecting with wires, wire end ferrules must be used.
Important note: The contact system of the regulator is subjected to environmental influences, thus the contact resistance may change. This can lead to a voltage drop and/or self-heating of the contacts.
NT 91-F: Thermostat(normally closed); contact breaker for regulating heaters. The contact opens when temperature is rising.
NT 92-F: Thermostat(normally open); contact maker for regulating of filter fans and heat exchangers or for switching signal devises when temperature limit has been exceeded. The contact closes when temperature is rising.