White Rodgers 1F85-277 Instrukcja Naprawy Strona 11

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Single Stage
System
RC RH C Y* W* G O/B 6 L
CLASS II
TRANSFORMER
HOT
24VAC
NEUTRAL
120VAC
Call for heat
24 volt
power for
cooling
24 volt
power for
heating
24 volt
common
(optional for
system
operation,
required for
remote
sensor and
system status
indicator)
Call for cool
Blower/Circulator fan
energized on a call
for cool or Fan On
(also energized in
heating if configured
for Electric Heat)
Installer
Configuration
Menu selects
“O” or “B” for
changeover
function. Set
to “O” terminal
energized in Cool
& Off mode. Set
to “B” terminal
energized in Heat
Power closed
connection for
SPDT 3-wire
zone valve
System
status
Indicator for
sytems
with “L” terminal
connection
TYPICAL WIRING1F97-0671
Single Stage or Heat Pump with no Auxiliary Heat with Single Transformer
*Jumper Y to W required for heat pump systems not compatible with heat pump systems that require an auxiliary heat output.
Single Stage System (No Heat Pump) with Two Transformers
NOTE: If continuous backlight or hardwired power input are desired but do not function in both HEAT
and COOL modes, cut the heating transformer 24V wires and tape off. Connect the neutral circuit
disconnected from the heating transformer to the neutral circuit of the cooling transformer. Discon-
nect the wire to the RH terminal and install a jumper between RH and RC. Depending on the system
requirements, replace the cooling transformer with a 75VA class II transformer if needed.
Single
Stage
System
RC RH C Y W6L
Call for heat
24 volt
power for
cooling
24 volt
power for
heating
24 volt
common
(optional
for system
operation,
required
for remote
sensor)
Heat mode-1st
stage,
Cool mode-1st
stage,
(Compressor)
G
Blower/Circulator fan
energized on a call
for cool or Fan On
(also energized in
heating if configured
for Electric Heat)
O
Installer
Configuration
Menu selects
“O” or “B” for
changeover
function. Set
to “O” terminal
energized in Cool
& Off mode. Set
to “B” terminal
energized in
Heat
Power closed
connection for
SPDT 3-wire
zone valve
CLASS II
TRANSFORMER
HOT
24VAC
NEUTRAL
120VAC
COOLING
CLASS II
TRANSFORMER
HOT
24VAC
NEUTRAL
120VAC
HEATING
120VAC
System
status
Indicator for
sytems
with “L” terminal
connection
Single Stage
3-wire
Zone Valve
application
Blower/Circulator
Fan Energized
Opens
Valve
(4)
Constant
24 Volt
(Com-
mon)
24 Volt
(Hot)
Cool
System
6
Y
W
C
RC
CLASS II
TRANSFORMER
HOT
24VAC
NEUTRAL
120VAC
24 Volt
(Hot)
Heat
(5)
RH
G
Jumper
Closes
Valve
(6)
3-Wire (SPDT) Heat Only Zone Valve Wiring
TYPICAL WIRING DIAGRAMS
Remote Sensor Terminals
+
S
-
Supply voltage
to remote
temperature
sensor
Remote
temperature
sensor signal
Supply voltage
to remote
temperature
sensor
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134
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