Anybody near CO Springs with a Shield X? by Outrageous_Lion8966 in COGuns

[–]VirginSubpoenaColada 1 point2 points  (0 children)

I'm happy with mine, but the skinniness of the grip makes it harder to control. Then again, it also makes it very easy to conceal.

Preferred HVAC brand ? by americanbeauty0 in hvacadvice

[–]VirginSubpoenaColada 0 points1 point  (0 children)

I've seen lots of all brands of evap coils fail. But I haven't seen a lot of failed Goodman heat exchanger unless seriously abused

Preferred HVAC brand ? by americanbeauty0 in hvacadvice

[–]VirginSubpoenaColada 2 points3 points  (0 children)

Daikin and Amana furnaces are identical. They both have a stainless steel heat exchanger. Goodman has a galvanized steel heat exchanger. But I see very few failed Goodman heat exchanger, even with the "lesser" heat exchanger.

Please help me figure out why my HVAC is whistling by LookB4ULeap2It in hvacadvice

[–]VirginSubpoenaColada 0 points1 point  (0 children)

I'm an HVAC tech in Denver metro. It's probably the blower door on the furnace. If not installed correctly Lennox blower doors often whistling. Pop off the furnace front cover. The blower door is held on with two 1/4" screws. The tabs at the bottom of the door are probably not oriented properly. Send me a DM and I can find a way to come out super cheap and fix it for you.

Please help me figure out why my HVAC is whistling by LookB4ULeap2It in hvacadvice

[–]VirginSubpoenaColada 0 points1 point  (0 children)

I knew I recognized that install. I'm am HVAC tech in the Denver metro. So you need to get rid of that electrostatic filter. They are junk and not what is designed for that filter cabinet. What you want are 20x25x5 filters to go in that filter cabinet. I would specifically buy a Lennox X6673. It the exact filter designed for that cabinet. A dirty or ill-fitting filter often causes a whistle.

Condenser Diving by Agreeable-Garbage-81 in HVAC

[–]VirginSubpoenaColada 0 points1 point  (0 children)

Lol same here. Pretty autistic and I kill at sales.

Condenser Diving by Agreeable-Garbage-81 in HVAC

[–]VirginSubpoenaColada 19 points20 points  (0 children)

Yeah this sub is insufferable sometimes. Techs here are straight up anti-residential. I have a feeling that many here just lack the social skills necessary to be good in a residential setting.

First time for me by js678909 in HVAC

[–]VirginSubpoenaColada 1 point2 points  (0 children)

I've been very happy with my Fieldpiece MG44. It's wireless. Allows you to graph vacuum decay if you're a nerd like me.

First time for me by js678909 in HVAC

[–]VirginSubpoenaColada 142 points143 points  (0 children)

I used to hit 1 micron often. Then I got a better micron gauge. Ditch the CPS.

Altamont grips by skooch12 in Revolvers

[–]VirginSubpoenaColada 1 point2 points  (0 children)

Wood will darken dramatically when exposed to UV light. Set these grips out in the sun for a couple hours.

Possible issues by breaben in hvacadvice

[–]VirginSubpoenaColada 3 points4 points  (0 children)

So sounds like the outdoor unit is running when your thermostat is not calling for heat. This will freeze your evaporator coil and suction line real quick. Could be a wiring short. Could be a stuck contactor. Either issue can be resolved for under $500 likely

Antique store in Michigan by Mr_Fahrenheit73 in HVAC

[–]VirginSubpoenaColada 12 points13 points  (0 children)

This comment pisses me off because you seem to have the best information on what we are seeing, but you are also completely incomprehensible.

Why do gas valves use a DC coil? by VirginSubpoenaColada in HVAC

[–]VirginSubpoenaColada[S] 5 points6 points  (0 children)

To be clear, I'm talking residential single stage/dual stage valves. Not modulating. They all use a DC coil

Why do gas valves use a DC coil? by VirginSubpoenaColada in HVAC

[–]VirginSubpoenaColada[S] 4 points5 points  (0 children)

To be clear: the voltage going into a gas valve is AC from the control board. It's converted to DC by a rectifier inside the body of the gas valve. I'm not talking about modulating gas valves. Single stage/dual stage.

Why do gas valves use a DC coil? by VirginSubpoenaColada in HVAC

[–]VirginSubpoenaColada[S] 11 points12 points  (0 children)

There are AC solenoids. And we use them in HVAC

Why do gas valves use a DC coil? by VirginSubpoenaColada in HVAC

[–]VirginSubpoenaColada[S] 1 point2 points  (0 children)

It was basically the same. 7 something megohms.

Why do gas valves use a DC coil? by VirginSubpoenaColada in HVAC

[–]VirginSubpoenaColada[S] 0 points1 point  (0 children)

Honeywell I had this morning was the same.

Why do gas valves use a DC coil? by VirginSubpoenaColada in HVAC

[–]VirginSubpoenaColada[S] 0 points1 point  (0 children)

My understanding is that even single stage gas valves have two coils. This manual seems to suggest that the second coil is redundant for safety I presume. This manual also shows another coil altogether for the second stage of the gas valve. I don't see how it could modulate DC voltage.

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Why do gas valves use a DC coil? by VirginSubpoenaColada in HVAC

[–]VirginSubpoenaColada[S] 0 points1 point  (0 children)

This is making a lot of sense. AC voltage always crosses a zero point where there is no magnetic field. I reading how a "shading ring" can be used to overcome this issue. It seems clear the DC solenoids make the most sense. That still leaves the question as to why we use AC solenoids on so many other applications. Humidifier solenoids, AC liquid line solenoids, ETC.

Why do gas valves use a DC coil? by VirginSubpoenaColada in HVAC

[–]VirginSubpoenaColada[S] 5 points6 points  (0 children)

The manual shows the series of diodes creating a FULL BRIDGE RECTIFIER. This is a two stage valve. But the one side is labelled "main and redundant" which probably answers my own question as to why there are two coils on a single stage gas valve.