Braeburn 2020NC Detailed Installer Guide

4
Heat Only or Millivolt
Set Installer Switch to CONV
Rh PowerConnection
W1 HeatRelay(appearsasW1/Eon2220NC)
1 HEAT / 1 COOL Single or Dual Transformer
Set Installer Switch to CONV
Rh 24VoltACPower(heatingtransformer)[note 2]
Rc 24VoltACPower(coolingtransformer)[note 2]
W1 HeatRelay(appearsasW1/Eon2220NC)
Y1 CompressorRelay
G FanRelay
C 24VoltACTransformerCommon[note 1, 3]
Typical Wiring Configurations
NOTE: The “Installer Switch” option will be configured in the next step.
Conventional Systems
24VAC Power
Terminal (C)
NOTES - Conventional Systems
[1]Ifbatteriesareinstalledthe24VoltACcommonconnectionisoptional
[2]Removefactoryinstalledjumperfordualtransformersystems
[3]Indualtransformersystems,transformercommonmustcomefrom
 coolingtransformer
Provide disconnect and overload protection as required.
2 HEAT / 2 COOL Single or Dual Transformer (2220NC Only)
Set System Type to CONV
Rh 24VoltACPower(heatingtransformer)[note 2]
Rc 24VoltACPower(coolingtransformer)[note 2]
W1 HeatRelayStage1
W2 HeatRelayStage2
Y1 CompressorRelayStage1
G FanRelay
C 24VoltACTransformerCommon[note 1, 3]

Braeburn 2020NC Specifications

General

Brand	Braeburn
Model	2020NC
Category	Thermostat
Language	English