Kitchen hood assembly with fire suppression control system including multiple monitoring circuits

A kitchen hood assembly having a fire suppression system and a supervision module for monitoring elements of the fire suppression system comprising:

• a kitchen exhaust hood;
• a series of fire suppression devices associated with the kitchen exhaust hood for extinguishing a fire within the vicinity of the exhaust hood;
• a series of fire sensors or manual actuators associated with the one or more fire suppression devices;
• and
• a switching circuit including first and second parallel conductors and a series of parallel switches connected between the conductors and operative to actuate the fire suppression devices in response to the fire sensors sensing a fire or one of manual actuators being actuated;
• a supervision module including at least three monitoring circuits selected from the group including:
• a first monitoring circuit for monitoring the integrity of the first conductor of the switching circuit;
• a second monitoring circuit for monitoring the integrity of the second conductor of the switching circuit;
• a third monitoring circuit for sensing the presence of a gas cylinder associated with a chemical fire suppression device;
• a fourth monitoring circuit for determining whether a solenoid associated with the chemical fire suppression device is electrically connected to a voltage supply;
• a fifth monitoring circuit for determining whether a solenoid associated with a water based fire suppression device is electrically connected to a voltage supply;
• a sixth monitoring circuit for monitoring the liquid level within a surfactant tank;
• and
• a seventh monitoring circuit for determining whether a pump operative to pump surfactant from the surfactant tank is electrically connected to a voltage supply.