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Is there a chart or formula to select correct blower pulley size?
The complaint was not enough air flow. The A/C guy installed a new condenser and said the problem was the furnace (my problem now, the oil guy). When I got there I think his evaporator was frozen. The TX valve was a block of ice and I think the condensate drain my have been froze. I shut it off and let it thaw for a half hour and it started to drain and work again.
The air flow is barely noticeable at the registers. This is an early 1950's house so duct is probably inadequate but it always worked.
The furnace is a 26-27 year old Williamson low boy, belt drive. 1725 1/3 hp motor. Approximate 6-1/2"blower pulley and 3-1/4" ? motor pulley. It is a 5 ton condenser . I think the motor is too small, but I am a boiler guy. The furnace is 156,000 and 1.35gph.
Would Williamson have a chart or guide? I am going to search.