INSTALLATION

Remove both access panels.

SELECTING THE BLOWER OFF DELAY

For GMP & GMPV series units, cut the white jumper wire between pins 1 & 4 of the 9 pin connector.

For GMPN & GMN series units, DO NOT cut the white jumper wire.

Remove the edgecard connector and other wires from the existing module. Discard the thermostat wires re- moved from the board (R, W & G).

Remove the existing HSI module. Care should be exer- cised as not to damage the nylon standoffs.

Install the 50T35-743 module.

Reconnect the edgecard connector making sure of good contact.

Push the 9 pin connector into the HSI module. It can go in only one way. DO NOT force.

Reconnect the supplied thermostat wires.

Remove the red wire from the 24 volt side of the secondary side of the transformer and discard.

Remove the blue ground wire from the transformer. DO NOT discard.

Remove the blue wire from the transformer and discard.

Place the red wire from the 9 pin connector on to "24 volt" of the secondary side of the transformer.

Place the blue wire from the 9 pin connector on to "Common" terminal of the secondary side of the transformer. This wire has a piggy back terminal.

Place the blue ground wire, which was previously re- moved, on to the "Common" terminal of the trans- former.

In the heating mode, the blower off delay can be selected to obtain a 90, 120 or 150 seconds period. This can be accomplished by changing the position of a plastic jumper located on the ignition control. See the drawing below for the location of this jumper.

TWIN

BLOWER

 

 

TIME OFF

STATUS

 

 

 

JUMPER

90

 

 

 

 

120

P3

 

150

 

 

W

 

 

G

 

 

R

 

The control is factory set to give a (150) second blower off delay. See drawing below for the jumper position for all available settings:

STATUS

 

STATUS

 

STATUS

 

90

 

 

90

 

 

90

 

 

 

 

 

 

 

120

 

P3

120

 

P3

120

 

P3

 

 

150

 

 

150

 

 

150

 

 

JUMPER SET

JUMPER SET

JUMPER SET

FOR 90 SEC.

FOR 120 SEC.

FOR 150 SEC.

Notes:

Black

115v. Supply

White

24 v. Red

Com. Blue

GND. Blue

TRANSFORMER

• If the jumper is removed, the control will default to a

(150) second blower off delay in the heating mode.

• The blower on time in the heating mode is (30)

seconds and is non-adjustable.

• The blower on time in the cooling mode is (7) seconds

and is non-adjustable.

• The blower off delay in the cooling mode is (60)

seconds and is non-adjustable.

• Caution is to be exercised not to bend the metal pins

Replace the access panels.

Restore gas and electrical power to the furnace.

Verify the sequence of operation as noted in the Installa- tion & Operating Instructions.

The Emerson logo is a trademark and a service mark of Emerson Electric Co.

when changing the time delay from the factory setting.

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White Rodgers 50T35-743 installation instructions Installation, Selecting the Blower OFF Delay
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50T35-743 specifications

The White Rodgers 50T35-743 is a highly regarded multi-stage thermostat designed to provide precise temperature control for a variety of heating and cooling systems. This thermostat is particularly popular in residential applications, offering energy-efficient performance while enhancing comfort levels within the home.

One of the key features of the 50T35-743 is its intuitive user interface. Equipped with a large, easy-to-read display, users can quickly adjust settings and monitor temperature readings. The touchscreen functionality simplifies navigation through the various menu options, facilitating effortless programming. This makes it ideal for homeowners who value convenience and ease of use in their climate control systems.

The 50T35-743 is compatible with most heating systems, including conventional and heat pump configurations, as well as central air conditioning systems. This versatility allows for broad application across different HVAC setups, making it a flexible choice for homeowners looking to upgrade their thermostat.

Energy savings is another significant advantage of the White Rodgers 50T35-743. With programmable settings, users can easily create schedules that align with their daily routines. This means that homeowners can set the thermostat to reduce heating and cooling when they are away from the house or asleep, leading to lower energy costs and increased efficiency.

Additionally, the thermostat incorporates advanced technologies such as anticipatory heating and cooling. This feature allows the thermostat to learn the user's habits and adjust the system's operation accordingly. By pre-heating or pre-cooling spaces before occupants return home, the 50T35-743 ensures optimal comfort without unnecessary energy expenditure.

Moreover, the White Rodgers 50T35-743 boasts robust connectivity options. Some models may support Wi-Fi connectivity, which further enhances user control. Homeowners can monitor and adjust their home climate remotely via smartphone applications, enabling greater flexibility and comfort management.

The built-in filter change reminder is another convenient characteristic that enhances the user experience. It notifies homeowners when it’s time to replace or clean filters, promoting optimal airflow and maintaining system efficiency.

In summary, the White Rodgers 50T35-743 thermostat stands out for its convenience, compatibility, energy-saving capabilities, and advanced technologies. For homeowners seeking to improve their HVAC management and achieve a comfortable living environment while keeping energy consumption in check, the 50T35-743 presents a superior choice. With its user-friendly interface and robust programming options, it is an excellent investment for any modern home.
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