Rittal 3374910 - Includes: Heat exchangers, Drilling template, Sealing and assembly parts, Without magnetic valve, uses a coupling relay instead which switches a floating contact upon reaching the set value, Without non, return valve, Including a 2nd rating plate, mounted inside the enclosure in a visible location, Power supply and pilot wires (fault signal contact/door limit switch) are routed separately downwards out of the enclosure base (near the water connections) via two metric screw connections (cable length 3 m).