White Rodgers 1F78 Check Thermostat Operation, Fan Operation, Cooling System, Heating System

Page 3

4 MOUNTING AND WIRING

CONTINUED FROM SECOND PAGE

 

 

 

 

 

 

 

 

JUMPER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WIRE

 

 

 

 

 

 

 

 

 

 

B

O

Y

G

 

W

RC RH

THERMOSTAT

 

 

 

 

 

SYSTEM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fan

 

Heating

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Relay

 

System

 

 

 

 

 

 

 

 

 

 

Hot

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOTE

 

 

 

 

 

 

24 VAC

 

 

 

 

 

 

 

 

120 VAC

For 2-wire Heat only,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Neutral

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

attach to RH and W

 

 

 

 

 

 

TRANSFORMER

 

 

 

 

 

 

 

 

 

Figure 2. Typical wiring diagram for

heat only, 3-wire, single transformer systems

B O Y G W

 

 

 

 

 

 

Cooling

 

Fan

 

Heating

System

 

Relay

 

System

 

 

 

 

 

 

RC RH

THERMOSTAT

 

 

SYSTEM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Hot

 

 

 

 

 

 

 

 

 

24 VAC

 

 

 

 

 

 

 

120 VAC

 

 

 

 

 

 

 

 

 

Neutral

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HEATING

 

TRANSFORMER

24 VAC

 

 

 

 

 

 

 

Hot

 

 

 

 

 

 

 

 

 

 

 

 

 

 

120 VAC

 

 

 

 

 

 

 

 

 

Neutral

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COOLING TRANSFORMER

 

 

 

 

JUMPER

 

 

 

 

 

WIRE

 

B

O

Y

G W

RC RH

THERMOSTAT

SYSTEM

 

 

 

 

 

 

 

Cooling

Fan

 

 

 

 

System

Relay

 

Hot

 

 

 

 

24 VAC

120 VAC

 

 

 

 

 

Neutral

 

 

 

 

TRANSFORMER

Figure 3. Typical wiring diagram for

cool only, 3-wire, single transformer systems

 

 

 

NOTE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RED jumper wire (provided with thermostat) must be

 

 

 

 

 

 

 

 

 

 

connected between thermostat RH and RC terminals

JUMPER

 

 

 

 

 

 

 

 

for proper thermostat operation with this system.

WIRE

 

 

 

 

 

 

 

 

B

O

 

Y

 

G

 

W

RC RH

THERMOSTAT

 

 

 

 

 

 

SYSTEM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cooling

 

Fan

 

Heating

 

 

 

 

 

 

 

 

 

 

 

 

 

System

 

Relay

 

System

 

 

 

 

 

 

 

 

 

Hot

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

24 VAC

 

 

 

 

 

 

 

120 VAC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Neutral

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TRANSFORMER

Figure 4. Typical wiring diagram for

heat/cool, 4-wire, single transformer systems

Figure 5. Typical wiring diagram for

heat/cool, 5-wire, two-transformer systems

JUMPER JUMPER

WIREWIRE

B O

Y

G W

RC RH

THERMOSTAT

SYSTEM

 

 

 

 

Reversing

Compressor

Fan

 

 

Valve*

Contactor

Relay

 

Hot

 

 

 

24 VAC

120 VAC

* Reversing valve is energized when the

 

Neutral

system switch is in the COOL position

TRANSFORMER

 

 

 

Figure 6. Typical wiring diagram for heat pump

with reversing valve energized in COOL

JUMPER JUMPER

WIREWIRE

B

O

Y

G W

RC RH

THERMOSTAT

SYSTEM

 

 

 

 

 

Reversing

Compressor

Fan

 

 

Valve*

 

Contactor

Relay

 

Hot

 

 

 

 

24 VAC

120 VAC

* Reversing valve is energized when the

 

Neutral

system switch is in the HEAT position

TRANSFORMER

Figure 7. Typical wiring diagram for heat pump

with reversing valve energized in HEAT

5 CHECK THERMOSTAT OPERATION

NOTE

To prevent static discharge problems, touch side of ther- mostat to release static build-up before touching any keys.

If at any time during testing your system does not operate properly, contact a qualified serviceperson.

Fan Operation

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 operate.

3.Move FAN switch to AUTO position. The blower should stop immediately.

Cooling System

!CAUTION

To prevent compressor and/or property damage, if the outdoor temperature is below 50° F, DO NOT operate the cooling system.

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 to adjust thermostat setting below room tempera- ture. The blower should come on immediately on high speed, followed by cold air circulation

3.Press to adjust temperature setting above room tem- perature. The cooling system should stop operating.

Heating System

1.Move SYSTEM switch to HEAT position. If the heating system has a standing pilot, be sure to light it.

2.Press to adjust thermostat setting above room tempera- ture. The heating system should begin to operate.

3.Press to adjust temperature setting below room tem- perature. The heating system should stop operating.

www.white-rodgers.com

Image 3
Contents Thermostat Details ContentsYour Thermostat Replaces PreparationsHydronic Hot Water or Steam Heating Systems Mounting and WiringBattery Location Electric Heat or Single-Stage Heat Pump SystemsHeating System Check Thermostat OperationFan Operation Cooling SystemFrom Third Thermostat Buttons and SwitchesOperating Features DisplayThermal Data SpecificationsTroubleshooting Electrical DataFrom Fifth

1F78 specifications

The White Rodgers 1F78 is a versatile and advanced smart thermostat designed to provide homeowners with optimal control over their heating and cooling systems. As energy efficiency becomes increasingly crucial, the 1F78 incorporates a range of features and technologies that cater to modern comfort needs.

One of the standout characteristics of the White Rodgers 1F78 is its user-friendly interface. The large, backlit display makes it easy to read and navigate, even in low-light conditions. The intuitive controls allow users to set temperature preferences quickly, making adjustments to their comfort levels effortless.

This thermostat is equipped with programmable capabilities, allowing users to set schedules for different days of the week. Homeowners can program the 1F78 to lower temperatures when the house is empty during the day and increase them before they return home. This feature not only enhances convenience but also contributes to significant energy savings over time.

The technology behind the White Rodgers 1F78 includes advanced temperature sensors that ensure accurate readings, leading to efficient temperature regulation. This ensures that the heating and cooling systems only operate when necessary, minimizing energy consumption and costs.

Moreover, the 1F78 is compatible with multiple HVAC systems, including gas, electric, and heat pump systems, making it an ideal choice for various home setups. Its versatility extends to Wi-Fi connectivity, allowing users to monitor and adjust their home's temperature remotely via a smartphone or tablet app. This capability provides homeowners with the convenience of controlling their thermostat from virtually anywhere.

Additionally, the White Rodgers 1F78 features a smart recovery function that learns how long it takes to reach the desired temperature and adjusts the start time accordingly. This ensures that rooms reach the set temperature by the scheduled time without unnecessary overworking of the HVAC system.

In summary, the White Rodgers 1F78 thermostat stands out for its programmable nature, user-friendly interface, compatibility with various HVAC systems, and advanced technologies that optimize energy usage. With its focus on comfort and efficiency, it presents a compelling option for homeowners seeking to enhance their home environment while reducing energy costs.