White Rodgers 1F78H Check Thermostat Operation, Fan Operation, Cooling System, Heating System

Page 3

4 MOUNTING AND WIRING

CONTINUED FROM SECOND PAGE

 

 

 

 

 

 

JUMPER

 

 

 

 

 

 

 

WIRE

 

C

B

O

Y

G

W

RC RH

THERMOSTAT

SYSTEM

 

 

 

 

 

 

 

 

 

NOTE

 

Fan

Heating

 

 

 

For Heat only,

 

Relay

System

 

Hot

 

attach to RH and W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

24 VAC

120 VAC

 

 

 

 

 

 

 

Neutral

 

 

 

 

 

 

TRANSFORMER

Figure 2. Typical wiring diagram for

heat only, 4-wire, single transformer systems

C 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

 

C

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, 4-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

 

 

 

 

 

 

 

 

C

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, 5-wire, single transformer systems

Figure 5. Typical wiring diagram for

heat/cool, 6-wire, two-transformer systems

JUMPER JUMPER

WIREWIRE

C 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

C

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.

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Contents Thermostat Details ContentsYour Thermostat Replaces PreparationsAttach Thermostat Base to Wall Mounting and WiringElectric Heat or Single-Stage Heat Pump Systems Hydronic Hot Water or Steam Heating SystemsHeating System Check Thermostat OperationFan Operation Cooling SystemButton. Hold will be displayed. Then choose the desired Configuration MenuThermostat Buttons and Switches From ThirdSet Current Time and Day Configuration MenuProgramming Your Thermostat Entering Your ProgramEnter Heating Program Enter Cooling TemperaturesCheck your programming From FifthSpecifications TroubleshootingSymptom Possible Cause Corrective Action From Seventh

1F78H specifications

The White Rodgers 1F78H is an advanced, user-friendly thermostat designed to enhance home heating and cooling systems. As a product of White Rodgers, a trusted name in HVAC controls, the 1F78H boasts a range of features and technologies aimed at providing efficiency, convenience, and reliability.

One of the standout features of the White Rodgers 1F78H is its intuitive interface. It incorporates a large, easy-to-read LCD display that clearly shows the current temperature and settings, making it simple for users to monitor and adjust their home environment. The backlit screen ensures visibility even in low-light conditions, contributing to its user-friendly design.

The 1F78H is equipped with a 7-day programmable schedule, allowing homeowners to set different temperatures for different days of the week. This level of customization enables users to optimize their energy usage based on their specific daily routines, ultimately leading to potential savings on energy bills. The flexibility of programming multiple events each day makes it an ideal choice for busy households.

In terms of technology, the White Rodgers 1F78H features smart recovery and adaptive intelligent recovery functions. These technologies allow the thermostat to learn from user patterns, ensuring that the home reaches the desired temperature by the scheduled time without excessive energy consumption. This adaptive approach is beneficial for maintaining comfort while minimizing unnecessary heating or cooling.

Another significant characteristic of the 1F78H is its compatibility with multi-stage heating and cooling systems. Whether users have a conventional furnace, heat pump, or central air conditioning system, the 1F78H can effectively manage their HVAC setup, offering enhanced control over indoor climates.

The thermostat also comes with an auto-changeover feature, automatically switching between heating and cooling modes based on the ambient temperature, ensuring consistent comfort year-round. The low battery indicator and easy battery replacement are additional thoughtful features that enhance the user experience.

Overall, the White Rodgers 1F78H thermostat combines advanced technologies with user-friendly design, making it an excellent choice for homeowners seeking efficiency and comfort. Its programmable features, compatibility with various HVAC systems, and intelligent recovery technology set it apart in the market, ensuring that it meets the diverse needs of modern households. With its practicality and reliability, the White Rodgers 1F78H is well-suited for anyone aiming to optimize their indoor climate control.