Setting the Control

WIRING (CONT.)

Diagram For Gas Or Oil Fired System With Tankless Domestic Coil

3-WIRE	TYPE 668 OIL
THERMOSTAT	TYPE 668 OIL
(USE W-B FOR	BURNER CONTROL
2-WIRE THERMOSTAT)	(LINE VOLTAGE)

24 VAC

GAS VALVE HIGH LIMIT

TRANS.

	TYPE		HOT	LINE	N		IGNITION
	TYPE						TRANS.
	809 RELAY						TRANS.
	809 RELAY
R
B	1	2			X	X	BURNER
B	1	2					BURNER
W							MOTOR
							MOTOR
JUMPER	3	4
JUMPER
									CIRCULATOR
							R	B	MOTOR
							R	B
							W
						HIGH	LOW LIMIT
						LIMIT	CIRCULATOR

The R-B contacts of the low limit-circulator control main- tain domestic hot water at the desired temperature year- round.

When the thermostat calls for heat the burner starts. The circulator also starts if the R-W contacts of the low limit- circulator control are closed.

If excessive boiler temperature causes the high limit to open, the circulator continues to run but the burner shuts down until the high limit recloses.

If low boiler temperature causes the R-W contacts of the low-limit circulator control to open, the burner stays on but the circulator stops until the R-W contacts reclose.

When the thermostat is satisfied, the circulator stops. The burner also shuts down if the R-B contacts of the low limit- circulator control are open.

Controls With Adjustable Differential

1.Insert a screwdriver in the centre slot and turn the dial until the right hand indicator “B” points to the lowest temperature of the cycle.

2.Turn the differential adjusting screw “C” until the left hand indicator “D” points to the highest temperature of the cycle.

The left-hand indicator points to the temperature at which the contacts open on high limit and low limit applica- tions. On circulator applications, the left-hand indica- tor points to the temperature at which the circulator will start.

On combination low limit and circulator applications,

the left-hand indicator points to the temperature at which the low limit stops the burner and permits the circulator to run.

Controls with a Fixed Differential

Insert a screwdriver in centre slot “A” and turn the dial until the fixed indicator “B” points to the highest desired tem- perature of the cycle.

The fixed indicator points to the temperature at which the contacts open on high limit and low limit applications. On circulator applications, the fixed indicator points to the temperature at which the circulator will start.

On combination low limit and circulator applications, the fixed indicator points to the temperature at which the low limit stops the burner and permits the circulator to run.

“B” FIXED INDICATOR

“B” FIXED INDICATOR	“A” ADJUSTING
	SLOT

“A” ADJUSTING
SLOT	“C” DIFFERENTIAL
	ADJUSTING SCREW
	“D” MOVABLE INDICATOR

1131 specifications

The White Rodgers 1131 is a versatile and reliable thermostat designed for residential heating and cooling systems. Renowned for its user-friendly interface and advanced features, it caters to homeowners looking for comfort and energy efficiency. This model stands out due to its robust construction and ease of use, making it an excellent choice for both modern and traditional HVAC systems.

One of the primary features of the White Rodgers 1131 is its digital display, which provides clear visibility of the current room temperature and set points. This display simplifies temperature adjustments and allows users to monitor their system easily. The thermostat is equipped with a simple programming interface that enables users to set up heating and cooling schedules according to their lifestyle, effectively optimizing energy consumption.

The White Rodgers 1131 employs advanced temperature control technologies, delivering precise temperature regulation that enhances overall comfort. This model supports dual fuel systems, making it compatible with a variety of heating sources, including heat pumps, gas, and oil furnaces. This flexibility ensures it can effectively manage heating and cooling demands in diverse climates, maintaining a comfortable indoor environment year-round.

Another notable characteristic is its energy-saving capabilities. The thermostat provides features that facilitate energy-efficient operation, such as adjustable setback settings. Homeowners can program lower temperatures during unoccupied hours and return to comfortable levels before their arrival, significantly reducing energy bills without sacrificing comfort.

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In summary, the White Rodgers 1131 thermostat is an excellent choice for homeowners seeking a reliable and efficient climate control solution. Its combination of user-friendly programming, dual fuel compatibility, and energy-saving features positions it as a top pick in the thermostat market, ensuring optimal comfort while reducing energy costs. With its robust design and adaptability, the White Rodgers 1131 is engineered to meet diverse residential heating and cooling needs for years to come.