Sequenceof Operation For Power Openand Power Closed Valvesor Normally Open Valves; Sequence Of Operation For Heat Pump Systems; Second Stage Heat And Cool Control - Honeywell VisionPRO 8000 Owner's Manual

VisionPRO TM 8000 Touchscreen Programmable Thermostat
Table 10. Sequence of Operation for Power Open and Power Closed Valves or Normally Open Valves.
System Setting Fan Setting Call for Action Energize Terminals Screen message
Off N/A None Y None
Heat N/A None Y None
Heat N/A Heat W Heat On
Table 11. Sequence of Operation for Heat Pump Systems.
System Setting Fan Setting Call for Action Energize Terminals Screen message
Off Auto None OiB a None
Cool Auto None O/B a None
Cool or Auto Auto Stage 1 Cooling Y, G, O/B a Cool On
Cool or Auto Auto Stage 1 and Stage 2 Cooling Y, Y2 d, G, O/B a Cool On
Heat Auto None O/B a None
Heat or Auto Auto Stage 1 Heating Y, G, O/B a Heat On
Heat or Auto Auto Stage 1 and Stage 2 Heating Y, AUX c, G, O/B a Aux Heat On
Heat or Auto Auto Stage 1, 2 and 3 Heating Y, Y2 d, AUX e, G, OiB a Aux Heat On
Em. Heat Auto None L b, O/B a None
Em. Heat Auto Stage 1 Heating E, G, L b, O/B a Heat On
Em. Heat Auto Stage 1 and Stage 2 Heating E, AUX, G, Lb, O/B a Aux. Heat On
aConfigure O/B in installer Setup. Based on last piece of equipment called (cooling = O or heating = B).
bRed LED is on. See LED Indication section for more details.
clf Installer Setup System Type is set to 2Heat/1Cool Heat Pump with Auxiliary Heat.
dlf Installer Setup System Type is set to 3Heat!2Cool Heat Pump with Auxiliary Heat.
eThis terminal does not energize if Installer Setup System type is set to 2 Heat/2 Cool Heat Pump with no Auxiliary Heat.
Second Stage Heat and Cool Control
While maintaining setpoint, several factors affect when 2nd
stage energizes such as load conditions, environmental
conditions, P+I control, and home insulation. The second
stage energizes when the thermostat senses 1st stage is
running at 90% capacity. This operation is droopless control.
35 68-0280