NOTE

IF SAFETY CIRCUITS ARE IN ONLY ONE OF THE SYSTEMS, REMOVE THE TRANSFORMER OF THE SYSTEM WITH NO SAFETY CIRCUITS.

 

 

O

Y1

Y2

G

CUT AND

 

CHANGEOVER

COMPRESSOR

 

 

ENERGIZED

CONTACTOR

 

TAPE OFF!

 

IN COOL

STAGE 2

 

 

 

 

HOT

 

 

 

 

 

120 VAC

24 VAC

 

COMPRESSOR

FAN

 

 

 

CONTACTOR

 

 

 

RELAY

NEUTRAL

 

 

STAGE 1

 

 

 

 

 

 

 

 

 

 

B

W1

W2

W3

 

HEAT

 

HEAT

 

RELAY

 

RELAY

 

STAGE 1

 

STAGE 3

CHANGEOVER

HEAT

 

ENERGIZED

 

RELAY

 

IN HEAT

 

STAGE 2

 

THERMOSTAT

CONTROL

CIRCUIT

THERMOSTAT

RC

SYSTEM

HOT

 

 

 

 

 

 

 

24 VAC

 

 

 

 

 

120 VAC

 

 

 

 

 

 

 

NEUTRAL

DEPENDING ON SYSTEM

REQUIREMENTS, REPLACE WITH A 75VA TRANSFORMER, IF NEEDED

TWO COMMONS MUST

BE JUMPERED TOGETHER!

Figure 5. Typical wiring diagram for two-transformer systems with NO safety circuits

NOTE

Relay contacts shown are thermostatically operated. The accessory relay scheme is required when safety circuits exist in both systems.

!CAUTION

Polarity must be observed. If the HOT side of the second transformer is jumpered to the COMMON side of the first transformer a short will be made. Damage to equipment will occur when power is restored.

THERMOSTAT

CONTROL

CIRCUIT

O

Y1

Y2

G

CHANGEOVER

COMPRESSOR

 

ENERGIZED

CONTACTOR

 

IN COOL

STAGE 2

 

 

COMPRESSOR

FAN

 

CONTACTOR

 

RELAY

 

STAGE 1

 

 

 

 

B

W1

W2

W3

C

R

 

HEAT

 

HEAT

 

 

 

RELAY

 

RELAY

 

 

 

STAGE 1

 

STAGE 3

 

 

CHANGEOVER

HEAT

 

 

 

ENERGIZED

 

RELAY

 

 

 

IN HEAT

 

STAGE 2

 

 

 

LIMIT OR

SAFETY

SWITCHES

24VAC

ACCESSORY RELAY N.O.

CONTACT

COMMON

 

 

 

 

 

 

 

 

THERMOSTAT

 

 

 

 

 

 

 

 

SYSTEM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LIMIT OR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SAFETY

 

HOT

24 VAC

 

 

 

 

 

120 VAC

SWITCHES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NEUTRAL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HEATING

 

 

 

 

TRANSFORMER

 

 

 

TWO COMMONS MUST

BE JUMPERED TOGETHER!

 

LIMIT OR

 

 

 

 

 

 

 

 

 

LIMIT OR

 

 

SAFETY

 

 

 

 

 

 

 

 

 

SAFETY

HOT

 

 

 

 

 

 

 

SWITCHES

 

 

 

 

 

 

 

 

 

SWITCHES

 

 

 

 

 

 

 

 

 

24 VAC

 

 

 

 

 

 

 

120 VAC

 

 

COMMON

 

 

 

 

 

 

 

 

 

NEUTRAL

COOLING

TRANSFORMER

Figure 6. Typical wiring diagram for two-transformer systems with safety circuits in BOTH systems

5

Page 5
Image 5
White Rodgers 1F95-71 installation instructions Cut

1F95-71 specifications

The White Rodgers 1F95-71 is a versatile, programmable thermostat designed to provide effective temperature regulation for residential heating and cooling systems. This thermostat stands out for its user-friendly interface and a range of advanced features that cater to the needs of modern homeowners seeking energy efficiency and comfort.

One of the key features of the White Rodgers 1F95-71 is its 7-day programming capability. Users can set different temperature schedules for each day of the week, allowing for maximum customization. This is particularly beneficial for households with varying schedules, as it provides the ability to tailor heating and cooling patterns according to the occupants' routines. The programmable settings can be accessed easily through its intuitive touchscreen interface, simplifying the user experience.

Another significant characteristic of the 1F95-71 thermostat is its Smart Recovery feature. This technology enables the thermostat to learn how long it takes to heat or cool a space to the desired temperature, ensuring that it starts the heating or cooling process early enough so that the desired temperature is achieved by the scheduled time. This not only enhances comfort but also improves energy efficiency by minimizing unnecessary energy consumption.

In addition to its programming capabilities, the White Rodgers 1F95-71 is equipped with a large, easy-to-read display. The clear screen makes it simple to monitor and adjust settings, even from a distance. For further convenience, the thermostat also supports features such as an auto-changeover function, which automatically switches between heating and cooling modes based on the current temperature and user preferences.

To promote energy conservation, the 1F95-71 includes an intelligent energy-saving system. It offers options such as a vacation hold mode, which allows users to set a specific temperature while they are away, preventing wasted energy on heating or cooling an empty home. This feature can significantly reduce energy bills while ensuring that the home remains comfortable upon return.

Compatibility is another strong point of the White Rodgers 1F95-71. It works with a wide variety of heating and cooling systems, making it a suitable choice for many homes. The thermostat is designed to work with gas, electric, heat pump, and multi-stage systems, making it a flexible option for modern HVAC setups.

In conclusion, the White Rodgers 1F95-71 is a highly functional and user-friendly programmable thermostat that combines advanced technology with energy-saving features. Its intuitive interface, 7-day programming, Smart Recovery, and compatibility with various heating and cooling systems make it an excellent choice for any homeowner looking to improve their comfort while reducing energy costs.