1F78R-700 White-Rodgers, 1F78R-700 Datasheet - Page 3

• Manufacturer Part Number: 1F78R-700
• Description: THERMOSTAT; ECONOMY MODEL 700; DIGITAL; NON-PROGRAMMABLE
• Manufacturer: White-Rodgers
• Type: Temperaturer

Specifications of 1F78R-700

• Brand/series: Model 700
• Display Type: Analog
• Function: Temperature
• Mounting Style: Wall
• Primary Type: Controller
• Range, Measurement: 45 to 90
• Voltage, Operating: 0 to 30 VAC
• Lead Free Status / Rohs Status: RoHS Compliant part
• For Use With: HVAC

4
5
If at any time during testing your system does not operate
properly, contact a qualified serviceperson.
If your system does not have a G terminal connection, skip to
Heating System.
1. Turn on power to the system.
2. Move FAN switch to ON position. The blower should begin to
3. Move FAN switch to AUTO position. The blower should stop
To prevent static discharge problems, touch side of ther-
mostat to release static build-up before touching any keys.
MOUNTING AND WIRING
CONTINUED FROM SECOND PAGE
CHECK THERMOSTAT OPERATION
To prevent compressor and/or property damage, if the
outdoor temperature is below 50 F, DO NOT operate the
cooling system.
operate.
immediately.
heat/cool, 4-wire, single transformer systems
cool only, 3-wire, single transformer systems
heat only, 3-wire, single transformer systems
For 2-wire Heat only,
attach to RH and W
RED jumper wire (provided with thermostat) must be
connected between thermostat RH and RC terminals
for proper thermostat operation with this system.
Figure 4. Typical wiring diagram for
Figure 3. Typical wiring diagram for
Figure 2. Typical wiring diagram for
NOTE
B
B
B
O
O
O
Cooling System
!
Fan Operation
Cooling
System
Cooling
System
NOTE
Y
Y
Y
CAUTION
Relay
Fan
NOTE
G
Relay
Relay
Fan
Fan
G
G
Heating
System
W
W
Heating
System
W
RC
JUMPER
RC
WIRE
24 VAC
JUMPER
RC
JUMPER
WIRE
RH
WIRE
TRANSFORMER
24 VAC
24 VAC
RH
RH
THERMOSTAT
TRANSFORMER
TRANSFORMER
SYSTEM
THERMOSTAT
THERMOSTAT
SYSTEM
SYSTEM
120 VAC
Hot
Neutral
Neutral
Hot
120 VAC
120 VAC
Hot
Neutral
www.white-rodgers.com
This thermostat has a time delay between cooling cycles to allow
the head pressure in the compressor to stabilize. If the tempera-
ture is adjusted to call for cool within 5 minutes of the last cycle the
snowflake icon will blink indicating the thermostat is locked out.
After 3 to 5 minutes, the compressor will start and the snowflake
icon will stop flashing. This helps prevent the compressor from
cycling too quickly and is normal operation for the thermostat.
1. Move SYSTEM switch to COOL position.
2. Press
3. Press
1. Move SYSTEM switch to HEAT position. If the heating system
2. Press
3. Press
ture. The blower should come on immediately on high speed,
followed by cold air circulation
perature. The cooling system should stop operating.
has a standing pilot, be sure to light it.
ture. The heating system should begin to operate.
perature. The heating system should stop operating.
Figure 7. Typical wiring diagram for heat pump
Figure 6. Typical wiring diagram for heat pump
heat/cool, 5-wire, two-transformer systems
B
with reversing valve energized in COOL
with reversing valve energized in HEAT
* Reversing valve is energized when the
Reversing
* Reversing valve is energized when the
system switch is in the HEAT position
Figure 5. Typical wiring diagram for
system switch is in the COOL position
Valve*
B
Reversing
O
B
Valve*
to adjust thermostat setting above room tempera-
to adjust thermostat setting below room tempera-
O
to adjust temperature setting above room tem-
Cooling
System
to adjust temperature setting below room tem-
Y
O
Compressor
Compressor
Contactor
Contactor
Heating System
Relay
Y
Fan
G
Y
JUMPER
JUMPER
WIRE
WIRE
Heating
System
Relay
Relay
Fan
Fan
W
G
G
W
W
RC
JUMPER
RC
COOLING TRANSFORMER
RC
JUMPER
24 VAC
24 VAC
WIRE
WIRE
24 VAC
RH
24 VAC
RH
TRANSFORMER
RH
TRANSFORMER
TRANSFORMER
THERMOSTAT
HEATING
THERMOSTAT
THERMOSTAT
SYSTEM
SYSTEM
SYSTEM
120 VAC
120 VAC
Hot
Neutral
Hot
Neutral
Neutral
Hot
Neutral
120 VAC
Hot
120 VAC