Weil-McLain BMC-6X operation manual Boilers are Short-Cycling

BMC and BMC-6X Installation and Operation Manual

•Boiler Mode Settings - The BMC will only modulate boilers their mode is set to Auto or Standby. Check if any boiler stage is set to Manual, Off, or Standby. See Mode on page 25.

Boilers are Short-Cycling

•Lag Delay - Increase the Lag Delay only if all boilers tend to short-cycle.

•Last Stage Hold - Increase the Last Stage Hold only if the lead boiler tends to short-cycle.

System is Overshooting or Undershooting

•Gain - If the system is overshooting reduce the Gain.

•Gain - If the system is undershooting increase the Gain.

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