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Adding SSR to Cuadra, notes and experiences Sec 4/7
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t3chiman
Senior Member


Joined: 26 Dec 2011
Posts: 16
Location: Chicago
Expertise: I love coffee

Espresso: Cuadra
Grinder: hand
Drip: Brazen
Posted Sun Jun 23, 2013, 12:37pm
Subject: Adding SSR to Cuadra, notes and experiences Sec 4/7
 

Wiring it up, trial 1
Both the relay operating coil, and the load circuit, are 120VAC. Normal line voltage wiring concerns apply. As for conductor sizing, the coil lines could be almost anything, 20Ga is fine. As for the heater, I had some solid 14Ga THHN on hand, intended for machine tool and appliance applications, so I used it. Insulation temperature rating is a concern near boilers; PVC at 90C is borderline, but acceptable. You will need some 1/4 inch spade connectors to match Cuadra's existing. And it's convenient to use fork terminals for SSR connections. Radio Shack quality is fine for these. Crimp them nice and tight. Initial positioning of wires on the boiler side is shown on pic 4. There's only four wires, and polarity is not a concern. Just don't get the coil and heater wires crossed.

t3chiman: 4_ssr_trial_wiring1_sm.jpg
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