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The White-Rodgers 90-170 contactor is a heavy-duty 3-pole HVAC contactor engineered for demanding commercial and industrial applications
making it suitable for millivolt systems or retrofits lacking a C-wire
How do I know if my ASCO valve needs a rebuild
it meets ASME Section IV requirements and is CSA listed to ANSI Z21
Lochinvar & A.O. Smith 100277815 Connection Board 340793-762 The White-Rodgers 90-170 contactor isThe Lochinvar & A. O. Smith 100277815 Connection Board is a critical low voltage interface designed for precise communication between the Smart System control and external HVAC components. As a veteran grade low voltage connection board, it serves as the central hub for integrating 0 10 VDC BMS inputs, building alarm contacts, and multi unit cascade sequencing. This OEM boiler control board is engineered to handle signal routing for pump delays,