Our 50% rule will inhibit 2-stage of heating or cooling based on the total number of zones calling. More than half of the total zones must be calling to enable 2-stage. If less than half are calling, the panel will not allow second stage to activate. The intelligent design of the BMPlus does not require the use of a dual fuel kit to be compatible with a dual fuel heat pump. The BMplus can be set to select staging based on an adjustable time delay or based on outside air temperature. The adjustable stage timer of 5 - 47 min. allows 1-stage thermostats to control 2-stage systems and heat pumps. The same potentiometer adjusts between 5 F and 47 F for outside air changeover. The adjustable supply air sensor included with every panel is used to protect the equipment from inefficient airflow. The BMPlus provides three adjustable settings for this feature. The cooling limit adjusts between 34 F and 52 F. The first stage of heat adjusts between 110 F and 170 while the second stage of heat has a 5 F to 47 differential from the first stage setting. This allows the supply air sensor to be mounted in the supply plenum, regardless of the coil/heat exchanger configuration.

• Staging via adjustable on-board timer (7 - 42 min)
• 50% rule to limit staging if less than half the total zones are demanding heating or cooling
• Supply air temperature monitoring to help protect HVAC equipment
• 100% dual fuel compatible
• On board LED's indicate system operation
• Gas/electric/hydro - Up to 2-stages heating and 2-stage Cooling
• Heat pump conventional - up to 3-stages heating and 2-stage cooling
• Compatible with any 1-stage heat/cool thermostat or 2-stage heat, 1-stage cool heat pump thermostat
• Compatible with URD, ND, RSD and SID, any 24 VAC 3 or 2-wire dampers
• 18 ga solid copper wire wiring
• 0 - 95% RH non-condensing
• 3-zones, expandable to 5 or 7-zones with the addition of 1 or 2 model XM-2 expansion modules
• 40 - 75 VA maximum transformer, NEC class 2
• Maximum 15 VA at 24 VAC current draw
• 4 A over-current-protection

• Catalog https://www.plumbers-supply-co.com//ASSETS/DOCUMENTS/ITEMS/EN/UNI-PS12668_Cat.pdf
• Specification Sheet https://www.plumbers-supply-co.com//ASSETS/DOCUMENTS/ITEMS/EN/UNI-PS12668_Spec.pdf