Question about Armstrong ASTRO-30 CIRCULATOR PUMP

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Armstrong ASTRO-30 CIRCULATOR PUMP not working

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: how to wire to 120v and thermostat on a armstrong

A line voltage thermostat is just like any other type of switch, except that it's controlled by temperature.

Just wire the 120vac to the pump, but interrupt the hot (black) wire with the thermostat.

Let me know if you need more help.

Posted on Oct 30, 2009


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Wiring a armstrong astro 30 circulating pump

If it is 120 volts it's quite simple. First make sure to turn off the heat at the red emergency switch. This will not affect your system. Simply turn the switch back on when you are done. Remove the cover off the small box on the side of the pump. There should be one screw holding it on. You should be feeding the pump with BX cable from the controller (Aquastat or pump relay). Older steel BX carries the ground through the cable, and the connector, but the newer, aluminum BX has a ground wire inside the cable.Remove about four inches of the BX cable from around the wires. Just bend the BX at the designated length until it breaks. Twist the cable clockwise in one hand and counter clockwise in the other. This will open it enough for you to snip the cable,(not the wires) with dikes or tin snips. Or, you can unravel the BX from the open end. Be careful. BX is sharp. Insert a red head (anti-short) around the two or three wires and slide it into the cable leaving the four inches of wire still outside the cable. Install a 1/2" BX connector into the the round opening provided on the box. Screw the nut onto the connector hand tight and tighten the nut by placing a flat screwdriver onto one of the nubs on the nut and tap it around with the heel of your hand or any pliers or hammer if available. Slide your wires through the connector until the cable bottoms out inside the connector. Tighten the connector set screw. Now you have a black, a white, and possibly a green wire inside the box. Strip about 3/4" of insulation off of each wire. The three wires in the box on the pump should already be stripped, but if not, strip those too. Twist the wires together using your hands or pliers. White with white, black with black, and green with green. This ensures a good connection. Now, you can twist your orange wire nuts on to the pre-twisted wires. Use orange nuts because they are smaller and will fit into the small box better than yellow or red nuts. To ensure a proper splice, twist them until the wires start to twist in your hand . Fold the wires into the box, install the cover onto the box making sure not to pinch the wires and turn the emergency switch back on.

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Hot water still takes two min. to go 50 feet . also is causing pipes to rattle. how is timer set?

It sounds like you have a 'crossover' problem.
Crossover means that cold water is getting into cold water pipe, and stopping hot water from flowing directly down the pipe.
This can signal a bad recirculation check valve, or a bad single-handled faucet cartridge.
Read how to test for crossover:

Also read about basic recirculation systems:

Upvote the help.
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How to wire to 120v and thermostat on a armstrong astro 30 pump

A line voltage thermostat is just like any other type of switch, except that it's controlled by temperature.

Just wire the 120vac to the pump, but interrupt the hot (black) wire with the thermostat.

Let me know if you need more help.

Oct 17, 2009 | Armstrong Plumbing

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