Combination High Limit - Low limit-Circulator Switching Relay Control

Manufacturer: Emerson Electric Canada / White Rodgers 
Part no.: 8B43A-601 

Condition: New old stock

Replacement for the control of hot water systems where boiler also provides domestic hot water.
These Relay-Hot Water Controls combine into a single enclosure: a high limit control, low limit-circulator control, circulator relay, transformer, together with terminals for wiring. 
They are for use on boilers equipped with tankless domestic coil. Although these controls are designed for use with a line voltage gas valve or oil burner control, they may also be used with low voltage primary controls. The internal transformer supplies power for operating the relay coil and systems zoned with motorized water valves. 

see full specs here https://usermanual.wiki/White-Rodgers/WhiteRodgers375488AUsersManual162413.2078476454.pdf 

Quantity available: 8