White Rodgers 668-451 installation instructions Operator Save these instructions for future use

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WHITE-RODGERS

TYPE 668-451

Intermittent Ignition* – Non Recycling

OIL BURNER CONTROL

With Series 956 Flame Detector (For use with 40VA Cooling Load)

INSTALLATION INSTRUCTIONS

Operator: Save these instructions for future use!

FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY AND/OR PROPERTY DAMAGE.

DESCRIPTION

This Type 668 Oil Burner Control provides safe operation of oil burners on heating plants where ignition during the entire burner cycle is desired. It is capable of powering external cooling loads up to 40 VA. A Sub-Base or other means must be used to prevent heating and cooling systems from being energized at the same time. The Type 668 is used with the Type 956 Flame Detector.

* Formerly called constant ignition.

PRECAUTIONS

If in doubt about whether your wiring is millivolt, line, or low voltage, have it inspected by a qualified heating and air conditioning contractor, electrician, or someone familiar with basic electricity and wiring.

Do not exceed the specification ratings.

All wiring must conform to local and national electrical codes and ordinances.

This control is a precision instrument, and should be handled carefully. Rough handling or distorting compo- nents could cause the control to malfunction.

!CAUTION

To prevent electrical shock and/or equipment damage, disconnect electric power to system, at main fuse or circuit breaker box, until installation is complete.

!WARNING

Do not use on circuits exceeding specified volt- ages. Higher voltages will damage control and could cause shock or fire hazard.

 

 

 

SPECIFICATIONS

 

 

 

ELECTRICAL DATA

Room Thermostat:

Input voltage: 120 VAC, 60Hz.

Set adjustable heat anticipator at 0.4 Amps.

Maximum Load Current:

Low Voltage Rating (Terminals R&C):

Oil Burner Motor (Orange Wire):

Maximum cooling load of 40VA @ 24v. 60 Hz.

10 Amps F.L. 60 Amps L.R.

Continuous duty. W & C cycled through thermostat.

Ignition Transformer:

Safety Timing: 45 seconds

360VA (3.0 Amps)

 

 

 

Relay Voltage: 24 Volts AC, 60Hz.

 

 

 

 

 

INSTALLATION AND WIRING

 

 

The proper Location and Mounting of the primary oil burner control panel on the burner and the flame detector with respect to the oil flame shall be determined by the furnace, boiler, or burner manufacturer.

If this control, supplied as part of a furnace, boiler or burner, is wired to the equipment or if the manufacturer of such equipment provides instructions for wiring this

control, then follow his recommendations. If no special wiring instructions are given, then follow the electrical connections shown.

For more complicated systems, especially for hot water heating, consult the manufacturer of the heating plant for full details of the desired sequence of control operation.

WHITE-RODGERS DIVISION

 

EMERSON ELECTRIC CO.

 

9797 REAVIS RD., ST. LOUIS, MO. 63123

 

(314) 577-1300, FAX (314) 577-1517

Printed in U.S.A.

 

9999 HWY. 48, MARKHAM, ONT. L3P 3J3

 

R(905) 475-4653, FAX (905) 475-4625

 

PART NO. 37-2228E

Replaces 37-2228D

9625

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Contents Specifications PrecautionsInstallation and Wiring Operator Save these instructions for future useTesting Installation and Wiring cont’dSafety Timing Normal CycleType 956 Flame Detectors Testing cont’dModèle Installation ET CâblagePrécautions SpécificationsEssais Installation ET Câblage suiteCycle Normal Délai DE SécuritéDétecteurs DE Flamme Modèle Essais suiteNOS DES Pièces DE Rechange

668-451 specifications

The White Rodgers 668-451 is a versatile and reliable thermostat specifically designed for residential and light commercial applications. Known for its user-friendly interface and advanced features, this model has gained popularity among homeowners and HVAC professionals alike.

One of the main features of the White Rodgers 668-451 is its intelligent control system, which provides precise temperature regulation. This thermostat can be programmed to operate efficiently through a 7-day scheduling feature. Users can set different temperature profiles for weekdays and weekends, ensuring comfort while also promoting energy savings.

The device is equipped with advanced humidity control, allowing it to maintain optimal indoor air quality. This feature is particularly important for homes in regions with varying humidity levels. The thermostat monitors the humidity and adjusts heating and cooling based on both temperature and humidity levels, offering a balanced environment throughout the year.

In terms of compatibility, the White Rodgers 668-451 works with various HVAC systems, including gas, oil, and electric heating systems, as well as central air conditioners. This versatility makes it an ideal choice for a wide range of homes and settings. It also supports multi-stage heating and cooling systems, ensuring peak performance.

Another significant characteristic of the 668-451 model is its easy installation and setup process. The digital display is large and clear, making it simple for users to navigate through settings. Additionally, it features a simple wiring configuration, allowing for a quick and efficient installation even for those who may not be seasoned DIY enthusiasts.

The thermostat’s durable design ensures longevity, and it comes with user-friendly features such as a filter change reminder. This function helps maintain system efficiency and prolongs the lifespan of HVAC equipment by alerting homeowners when it's time to replace the air filter.

In conclusion, the White Rodgers 668-451 thermostat stands out for its advanced scheduling, humidity control, compatibility with various HVAC systems, ease of installation, and user-focused features. Its thoughtful design and functionality make it an excellent choice for improving comfort and energy efficiency in any residential or light commercial space.
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