RFA 33, 34, 35, 36 replace ARCU 1 or 2 pipe valves sideways. The valves can be controlled with a thermostat or handwheel M28x1.5. RFA 41/42 replaces ARCU 1 or 2 pipe valves bottom coupled with M22x1.5 pipe connection. RFA 71/72 replaces ARCU 1 or 2 pipe valves bottom coupled with internal G3 / 8 ″ pipe connection. The valves can be controlled with a thermostat or handwheel M28x1.5. The RFA valves have a concealed preset under the sealing box. Adjustment of 2-pipe system is done with key FN2. The valve has a M22x1.5 or G3 / 8 ″ connection to the pipe system. The connection to the radiator is M34x1.5. The distribution of the flow (1-pipe) between the radiator and the by-pass is mixed with FN2. Screw the number of turns specified in table radiator flow. The return of the valve is stopped with a spindle under the lid and inlet with thermostat or handwheel. When disembarking, the bypass is not closed.
