Part No. of Replacement Part

TESTING CONT.

F142-0006	Cell only (Old Style)

4.If safety lockout problem is of an occasional nature the following additional check may be made to insure that flame detector location is not a marginal one:

a.Disconnect flame detector leads from “F” terminals.

b.Attach a jumper wire to one “F” terminal. Start burner. Then immediately connect jumper wire to the other “F” terminal. Burner should continue to run.

c.With burner running, attach flame detector leads to an accurate ohmmeter. Reading of ohmmeter should be below 1000 ohms, and preferably as low as 500 ohms.

NOTE

If indicator of ohmmeter remains steady, readings up to 2000 ohms should also be acceptable. Gener- ally, though, the lower the reading, the better the application, and less likely the chance of a variation in the burner flame causing a safety lock-out.

d.If resistance of flame detector is over 1000 ohms, it may not be able to see the burner flame properly. Check alignment of the flame detector through the hole in the static pressure disc. Clean this hole if it is blocked by foreign matter. Check for broken “F” wires.

e.If flame detector alignment is good but resistance is still high, readjustment of burner flame and/or nozzle re- placement may be necessary (according to burner manufacturer’s instructions).

!WARNING

Be sure to remove wire jumper after finishing this flame detector check.

668 specifications

The White Rodgers 668 is a cutting-edge thermostat that has been designed to optimize comfort and energy efficiency in residential and commercial settings. As part of the White Rodgers line, this device embodies a commitment to quality craftsmanship and innovation.

One of the standout features of the White Rodgers 668 is its user-friendly interface. The device boasts a large, easy-to-read display that allows users to view and adjust settings effortlessly. With clearly labeled buttons and an intuitive design, even those who are not technologically inclined can navigate the thermostat's various functions with ease.

The White Rodgers 668 incorporates advanced temperature control technology that helps maintain consistent indoor temperatures. This feature is vital for ensuring comfort across different seasons, as it minimizes fluctuations and enhances the overall climate within a home or office. Users can program the thermostat for different times of the day or week, allowing for tailored heating and cooling cycles that align with their schedules, ultimately leading to energy savings.

Energy efficiency is further enhanced through the integration of smart technologies. The White Rodgers 668 is compatible with a range of zoning systems, allowing homeowners to heat or cool specific areas of their property without wasting energy on unoccupied rooms. Additionally, the device can often be interfaced with smart home systems, allowing for remote control and monitoring via smartphones or tablets. This feature not only adds convenience but also empowers users to make adjustments that can lead to lower energy bills.

In terms of installation, the White Rodgers 668 is designed to be compatible with most HVAC systems, making it a versatile choice for a variety of applications. It typically includes clear installation instructions and the necessary hardware to streamline the setup process, which is a significant advantage for both homeowners and professionals.

Overall, the White Rodgers 668 is an exemplary thermostat that combines user-friendly features, advanced temperature control technology, and energy-saving capabilities. Its sleek design, combined with practical programmability and smart technology compatibility, makes it a smart choice for anyone looking to enhance their climate control systems and reduce energy consumption. With a reputation built on reliability and performance, the White Rodgers 668 stands out as a premier option in the thermostat market.