Lochinvar RLY20064 LOW VOLTAGE CONNECTION BOARD
 
Used in the following models: WH 55, WB 51, WH 85, WB 81, WH 110, WB 106, WH 155, WB 151, WH 199, WB 211, WH 285, WH 399, Lochinvar Parts, Hydronic Heater Parts, Lochinvar, Lochinvar, Lochinvar, Knight, Wall Mount WB & WH