Spa pump: relay wiring questions


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Old 07-05-17, 10:19 AM
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Spa pump: relay wiring questions

I've got an old spa that the spa control system no longer functions. Motor still runs ok. I'm pulling the control system apart and would like to use the relay to turn the motor on/off. That's all I really need. The relay is marked as 8932 Honeywell R4242B 1005. The power in/out terminals are marked as L1, L2, T1, T2 so that part is known. Trying to figure how to activate the relay. I'm guessing 24 AC would work but what terminals to use. There are a pair of terminals at both L1/L2 and T1/T2 ends each marked a C. Are the L1/L2 C terminals for NO and with 24 VAC applied would close. Then are the T1/T2 C terminals used as a shut off if TI/T2 have power applied. Thanks
 
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Old 07-05-17, 10:59 AM
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8932 is the manufacturing date....... 32nd week of 1989.

That relay is actually a contactor and uses a 120v coil.

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L1 and L2 = line ins
T1 and T2 = line out
C and C = coil
 
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Old 07-05-17, 01:45 PM
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Thanks Pete. Looks like the contactor wouldn't do what I need. I wanted a low voltage (24 vac) to have a spa deck mounted switch. This would close a relay to power the pump. So I'll probably get an irrigation timer power supply and a pump relay that will start the 120 vac motor with a 24 vac control circuit.
 
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Old 07-06-17, 01:42 PM
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wiring a Honeywell R4242B 1005 contactor with 120 motor

Hi I'm trying to make a repair of an old hot tub where the motor works but the spa control system doesn't. Took all the parts out of the spa system except the GFI. I found inside a Honeywell R4242B 1005 contactor that appears to test out good. It uses a 120 control coil. Since I don't want 120 buttons on the top deck I'm thinking of using an air switch designed for a garbage disposal that has a latching toggle. It looks like the contactor was designed for either 120 or 240, there are terminals for L1/L2 and T1/T2. I'm thinking that I use the L1/T1 for the hot lead on the motor. The L2/T2 would be unused. Other wise, if someone was working on the unit with L1/T1 connected, the might not release that T2 was hot if there was a problem with the contactor L2/T2 terminals. Make sense. Basically means you only switch the hot lead and not the neutral.
 
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Old 07-06-17, 08:22 PM
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I combined your two threads.

Yes.... you can just use L1 and T1 for 120vac control.
 
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Old 07-07-17, 09:01 AM
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thanks again pete for the help!
 
 

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