How to adress the gaps around the PTAC unit

[vish]

Hi,
I am an intern working on a Hotel project. During the walk through around the facility and with the help of infra red camera, I noticed significant gaps around the PTAC units. I was wondering how to adress these gaps, Also there seems to be a problem with their control unit as it blows a hot air on the lowest setting? Any suggestions would be appreciated. Thanks!

Carrier PTAC unit Series XC-D

[Armament]

I was involved in a retrofit where I put 50 ptacs in place of old mamoth ac/heating units. One of the most god awful experiences of all time.

Where are they mounted? Are you referring to gaps within the ptac sleeve or around the sleeve itself? One is a carpentry problem and one is a design issue so they can be easily removed for servicing

[skibme]

canned spray foam

[vish]

The gaps are around the sleeve as the cold air draft was felt coming out from the top mainly around the PTAC unit. Thanks for the quick response.

[jackintheboxtec]

canned spray foam

[vish]

Will it be more efficient to take out PTAC unit out and re install it or the more economical would be to sprat foam the top gaps on the PTAC unit?

I am not a handyman but I assume taking the PTAC unit out would be more expensive than using the spray foam.

[chillerguy81]

Will it be more efficient to take out PTAC unit out and re install it or the more economical would be to sprat foam the top gaps on the PTAC unit?

I am not a handyman but I assume taking the PTAC unit out would be more expensive than using the spray foam.

Usually only takes about two minutes to remove the PTAC from the sleeve, once you know what your doing. Thats what your gunna want to do if you need to seal around the sleeve.

[flange]

just walk up to them ans say....why hellooo gaps

[ACFIXR]

Hi,
I am an intern working on a Hotel project. During the walk through around the facility and with the help of infra red camera, I noticed significant gaps around the PTAC units. I was wondering how to adress these gaps, Also there seems to be a problem with their control unit as it blows a hot air on the lowest setting? Any suggestions would be appreciated. Thanks!

Carrier PTAC unit Series XC-D

Another way to look at it is that you are supplying fresh outside air to the room.

[DeltaT]

canned spray foam

No, no, no, no, no. Just for my sake alone. Had an old condo building full of old Trane PTACS where 99% were still working. Leaked air all the time winter and summer.

One customer took a few cans of spray foam and "fixed" the leaks. He entombed the unit and it took me about two hours laying on the floor cutting and pulling our the hardened spray foam.

[basshound71]

Foam weatherstripping

[TriSTar]

PTAC's have an opening in them for ventilation requirements anyway. Unless they have been capped and outside air is being introduced to the space via a 100% outside air unit. If you are in a high humidity climate then you may have serious problems regardless of how you seal the unit. I agree with the statement about servicing the unit if you use canned spray foam. Use weatherstipping or wool insulation to prevent leakage as it will be easier to remove when the unit is replaced.