AERCO Belimo Motorized Valves Installation - Manual (Page 19)

PR2: 08/02/12 Page 19 of 20 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288
Installing Belimo Motorized Valves on AERCO Benchmark Boilers
Technical instruction Document
TID-0028_0C
6.3 Sequence of Automation Functions
1. When a boiler is in demand, its Aux Relay will close, signaling the BAS. The Aux Start On Delay
timer starts.
2. The BAS opens the MOV of the corresponding boiler.
3. When the valve has fully opened, its proof of open switch is made, closing the delayed interlock
of the boiler — allowing the boiler to fire.
4. When the demand is satisfied on a corresponding boiler, the BAS will keep its valve open for at
least 2 minutes before closing.
5. When there is no more demand from the entire system (all boilers are off), the BAS will open all
boiler MOVs.
6. The next time there is a demand on a boiler, this sequence repeats and the BAS closes the MOV
of the other boilers that have no demand.
NOTE
For complete wiring connections, see Belimo’s Installation and Maintenance Instructions shipped with the
valve and also available online at:
http://www.belimo.us/belimo/media//Instructions/Installation/BFV_Instruction_Sheet.pdf