If so, the appliance(s) will be able to operate without damper operation.Īfter two (2) hours, damper operation is checked and if present, the control will go back to normal operation. During a following call for heat, the Operating Priority function will detect if one or more appliances can be operated safely and with proper draft. The integrated proven draft function will shut down the entire system in case of a power failure to the actuator or other mechanical failure. When the last appliance shuts down the damper will stay partly open in post-purge mode for a preset time period. When an appliance shuts down, the damper will close slightly while still maintaining the draft setting. The sequence is repeated every time a new heating appliance calls for heat. Once the draft reaches the draft set-point the damper modulates maintaining a constant draft.
After a programmable pre-purge time period, the EBC31 allows the burner to fire (draft must be established within 60 seconds, or the burner will be shut down). A call for heat opens the damper completely.
#EBC12 MODULATING DRAFT CONTROL MODS#
The MODS system is supplied as a complete package with a multi-bladed damper and attached actuator, control(s), pressure sensor, draft probe and over-pressure safety switch.Įach appliance is interlocked with the control. The EBC31 maintains a constant draft for the heating appliances by modulating the position of the damper. The MODS system consists of the MDF, Modulating Damper and the EBC31, Modulating Fan Control along with an OPS, Over Pressure Switch.
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