Published at Tuesday, March 26th, 2019 - 02:16:15 AM. wiring. By Yvonne Aubert.
The largest reading was from 1 to 3, and would be the reading through both windings so that would be from 1 through common to 3. This tells you that the 2 terminal is the common terminal. “You have identified the “C” the common terminal as the number 2 terminal,” Bob explained. ”Now we know from process of deduction what the other 2 terminals are. The shortest winding with the least resistance is the run winding so terminal 2 to terminal 1 is the smallest resistance making the 1 terminal the “R” run terminal. The only terminal we have left is the “3” terminal and that makes it the start terminal. You can now take the red wire and put it on the run terminal, the white wire on the common terminal and the black wire on the start terminal.
Hot water systems are used mostly in the Northeast. They are very versatile, and can be used to economically zone different parts of a building. As with the steam boiler and hot air furnace, these systems also have a flue damper, spill switch, and rollout switch. We are going to discuss a forced hot water system, meaning that there is a pump to circulate the water in the system. Most package boilers come with a combination aquastat/circulator relay control; 120 V is brought into the control to terminals L1 and L2. The thermostat is brought to terminals T1 and T2, the circulator is connected to terminals C1 and C2, and terminals B1 and B2 power the gas valve. When the thermostat calls for heat, it closes terminals T1 and T2.
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