Where should DAS (Dishcarge Air Sensor) be mounted? (Lennox SLP98V)

[birdguy77]

Hi everyone,

Had a discharge air sensor installed today on my Lennox SLP98V. The Tech installed it in 2 different places. First, he installed it in the rear of the supply duct just directly above the A-coil (see last picture, that is where it is now).

Second, he installed it on a branch duct (see pictures one and two, look for the aluminum foil tape covering the hole just above the "natural gas" yellow label on the nat-gas line.

The position over the a-coil reads a much higher temperature rise which results in the blower speed being much higher. The second location off the branch duct reads a lower temperature rise (and thus, much lower blower speed results).

Which is the correct spot that it should be installed?

Many thanks

[chillerout1]

what did they installation instructions say? and whats the deal with the plastic dryer hose? and the long run of copper gas line with the electrical tied to it that is a disaster waiting to happen. hope this isnt a new install

[chillerout1]

oh and where is the insulation on the duct? those pictures look like they should be on the wall of shame

[birdguy77]

Not a new install. "Dryer Hose" goes to a generalaire humidifier. They didn't leave any installation instructions behind.

[hvac wiz 79]

those pictures look like they should be on the wall of shame

lol i couldn't agree more

Sent from my HTC Sensation 4G using Tapatalk

[chillerout1]

what tstat do you have? could be that it is set up incorrectly, discharge sensor should be in the supply downstream of acoil, do you have install or owners man for tstat? and yes you need to get that electrical off of that gas line!

[luskys a/c]

Second, he installed it on a branch duct (see pictures one and two, look for the aluminum foil tape covering the hole just above the "natural gas" yellow label on the nat-gas line.

Copper and Natural Gas is a No No. Please look into your service company replacing this with the correct piping.