Emerson 80 Series - Application Selection Jumpers

80 Series Thermostats
29
Application Selection Jumpers
Conventional & Universal Models
RC / RH Jumper
• Single Transformer Systems  Don’t
Clip Jumper
– The thermostat electrically connects the
RC (Hot Leg of the Cooling Transformer)
and the RH (Hot Leg of the Heating
Transformer) so a jumper is not required
• Two Transformer Systems  Clip
Jumper
– If there is a separate wire for RC and RH,
clip the RC/RH jumper on the back of the
thermostat.
– This will isolate both terminals so they can
be independently used.
Heat Pump Models
W2 / E Jumper
• Combined Aux and Emergency Heat 
Don’t Clip Jumper
– The Heat Pump thermostat electrically
connects W2 and E terminals so you do not
need to install a jumper wire.
• Independent Aux and Emergency Heat
 Clip Jumper
– If there are separate W2 and E wires, clip the
W2/E jumper located on the back of the
thermostat.
– Setting system switch to Aux results in
auxiliary heating with no compressor
operation.
For Two Transformer Systems, improper phasing will result in damage to the transformer.