Fieldpiece DDSM1 Pressure Switch Tester

[RussellHarju]

Check out the video for the DDSM1 Pressure Switch Tester.

[Coloradotech]

I have one and works great! not a tool you need every day but nice to have.

[hurtinhvac]

Why is this necessary when the same can be accomplished with a manometer, multimeter and your fingers squeezing the tube (provided you really cared at which point the switch was making or breaking after determining it was bad).

I think I've had one genuine bad pressure switch in an entire heating season.

[philjafo]

They are very usefull in setting universal pressure switches.

[hurtinhvac]

They are very usefull in setting universal pressure switches.

Ah...good point.

[Coloradotech]

It works really good to check full modulating furnaces that set there gas pressures off the pressure switches. Pressure differential is very imported with this type of furnace.

[kdean1]

As I understand it, this is the draft rite tool now owned by Field Piece. The draft rite is not something I need often, but it sure is good at what it does. I use it to test pressure switches and set universal pressure switches for accurately replacing the old one. And I have used it in one case to find out that the hack installers reduced 3" PVC to 2" at the termination point of a condensing furnace which caused furnace shut downs.

[kdean1]

Pressure differential is very imported with this type of furnace.

I prefer domestic pressure differential to the "imported" ones.

[chuckcrj]

Why is this necessary when the same can be accomplished with a manometer, multimeter and your fingers squeezing the tube (provided you really cared at which point the switch was making or breaking after determining it was bad).

I think I've had one genuine bad pressure switch in an entire heating season.

I have replaced about 8 "genuine bad" pressure switches this fall already. We work on furnaces from Sept to May, they get a lot of cycles here.

[tuba]

I was thinking about this tool the other day when I had to adjust two brand new Reznor pressure switches. They were rated for 1.0" but started flapping the gas valve at 1.2" I had to use the manometer tee and the 'pinch' method. How much does that tool go for?

[Coloradotech]

I was thinking about this tool the other day when I had to adjust two brand new Reznor pressure switches. They were rated for 1.0" but started flapping the gas valve at 1.2" I had to use the manometer tee and the 'pinch' method. How much does that tool go for?

I payed 160 for it!