Taco SR504 Switching RelayThe Taco SR504 Switching Relay is a compact, reliable 4 zone switching relay designed for boiler, circulator, and hydronic system control. With electronic actuation and a DPDT switch, it delivers precise, dependable zone management. This fully enclosed unit measures 12 1 4" W x 3" D x 8" H and is rated for 120V AC at 60 Hz with a 1 3 HP input, plus current ratings of 20A combined, 6A full load, and 36A locked rotor. Key features and compatibility: 4

food processing plants

Electrical: 1 mA current with 1 kΩ output at 32°F

the SunTec B2TA8851NB combines robust construction with compatibility across model variants such as B2TA8851 and B2TA8851N

helping maintain efficient performance across varying temperatures and load conditions

designed for dependable furnace venting and safe operation

while the -1

Supports reliable draft and safe exhaust flow

this compact transformer provides clean

The Boiler Thermal Balancer helps stabilize temperatures and improve efficiency for gas-fired hot water boilers

Knob adjustment enables precise

helping maintain optimal performance and long service life

Compatibility: Works with CW90