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.
Summary of Contents for 80 Series
Page 1: ...80 Series Thermostats 1 Emerson 80 Series Thermostats ...
Page 2: ...Business and Product Overview ...
Page 19: ...Technical ...
Page 32: ...Install ...
Page 35: ...80 Series Thermostats 35 Instruction Sheets 1F85U 42PR 1F85U 42NP 1F85U 22PR 1F85U 22NP ...
Page 44: ...80 Series Thermostats 44 Installer Configuration Menu ...