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.

!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

Page 3
Image 3
White Rodgers 750 installation instructions Check Thermostat Operation, Fan Operation, Heating System, From Second

750, 750 specifications

The Emerson 750,750 is a cutting-edge solution in the field of automation and control systems designed to streamline industrial processes and enhance operational efficiency. This advanced control platform integrates a wide array of features and technologies that cater to the diverse needs of modern industries, including oil and gas, pharmaceuticals, power generation, and water treatment.

One of the major highlights of the Emerson 750,750 is its modular design. This architecture allows users to configure the system according to their specific requirements, promoting flexibility and scalability. The modular components can be easily upgraded or replaced as technology evolves or operational needs change, ensuring that businesses can keep pace with advancements in the industry without massive overhauls of their existing systems.

The 750,750 also boasts an intuitive user interface, enabling operators to interact with the system seamlessly. The interface is built on advanced software technologies that provide real-time data visualization and analytics, empowering users to monitor their processes effectively. The integration of advanced graphical displays improves the decision-making process by allowing users to quickly interpret data and respond proactively to any anomalies.

In terms of communication capabilities, the Emerson 750,750 supports a wide range of protocols, such as Ethernet/IP, Modbus, and Hart, ensuring compatibility with various devices and systems. This connectivity simplifies the integration of the control system into existing infrastructures, allowing for streamlined operations and data sharing across different platforms.

Safety and reliability are also paramount in the design of the Emerson 750,750. The system incorporates features such as redundant power supplies and fault tolerance, providing uninterrupted service and minimizing the risk of downtime. These qualities make the 750,750 a reliable choice for critical applications where safety and continuity of operations are essential.

Furthermore, Emerson's commitment to sustainability is evident in the energy-efficient design of the 750,750. The system is engineered to minimize energy consumption while maximizing performance, thus supporting organizations' efforts to reduce their environmental footprint.

In summary, the Emerson 750,750 is a versatile and powerful automation platform that aligns with the evolving demands of industrial operations. With its modular design, user-friendly interface, robust communication capabilities, and focus on safety and sustainability, it represents a significant advancement in control technology, empowering industries to enhance efficiency and drive innovation.