80 Series Thermostats
42
80 Series Universal -42 (4H/2C) Wiring
•
Universal Applications
–
Heat Pump, 4 Heat/2 Cool
•
The Universal -42 for Heat Pump has 2 stages of compressor (Y1 & Y2) plus 2 stages of
Auxiliary (W/E and W2)
•
Integrated RC/RH jumper on the back of the thermostat
•
Selectable O/B switch setting on the back of the thermostat
•
Dual Fuel is selected in the Installer’s Menu, Item 60
Universal 4 Heat / 2 Cool
2 Stage
Furnace
w/ 2 Stage
A/C
RC
RH
O/B
G
Y
Y2
W/E
W2
C
L
Power
for
Cooling
Power
for
Heating
Reversing
Valve
Fan
Relay
1
st
stage
compressor
2
nd
stage
compressor
1
st
Stage Heat
Gas
2
nd
Stage
Heat Gas
Common
wire for
24C
Heat Pump
Malfunction
Diagnostics
Terminal
(input signal
requires
common)
2 Stage
Heat Pump
with w/ 2
Stage Aux
or
(Dual Fuel)
Staged Aux
Heat and
Emer Only
Staged
Heat (Aux)
RC
RH
O/B
G
Y
Y2
W/E
W2
C
L
NOTE: When using a separate stage of auxiliary as
the emergency mode the thermostat will only have 3
stages of heat for normal operation.
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 ...