Remove PTAC unit for servicing
Can my AC tech pull this PTAC unit w/o cutting the copper pipe? The copper pipes are from the buildings boiler and provide heating during the winter. The rest of the unit is a AC unit.
Comments
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That looks like a modified PTAC to me. I've done plenty of PTAC"S and never seen the hot water coil on the discharge, external to the unit. Generally PTAC"S are a packaged unit that slides out of their casing so it can be repaired. preferably on a bench. Take the old one out and slide another one that's already been repaired. Maybe that's so old and that how they did it. looks like it will still slide out if you can support the coil. hang it from the window sill. might have to call McGyver
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They'll have to support the H W coil or remove it.
it should have unions to service it anyway
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The way the tubing is bent looks factory to me. But I agree with @pedmec never seen a coil like that
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Are there valves near the floor in that dark corner on the right?
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You might be able to just lift that hot water coil up and slide the ptac out from under it, after disconnecting the zone valve.
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What type of service are you trying to do? Does it need to be removed?
Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream1 -
Is that a PTAC or Fan Coil unit?
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So I think I have 2 options here….
- Have the AC tech remove the PTAC (support the hot water coil with a 2x4), and have them washed at his shop. I worry about AC tech breaking something. And then a simple cleaning turns into a complete replacement job. $$$$$
- Remove the PTAC, spray both the evaporator and condensor coil with appropriate no rinse cleaners and replace them. (1 day job).
What do you recommend to clean the surface grim on the unit?
Yeah there might be. I'll have to take a look.
Evap and condenser coil cleaning. Also the tenants want the grim cleaned off the surface.
Not sure. Since I've owned the property, I've heard it referred to as a PTAC. The boiler in the basement brings the hot water to the unit. And the PTACs blower distributes hot air by blowing air on the copper pipe.
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Thats a Fan Coil unit. Theres no air condationing in it.
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The hydro coil looks like it has valves on both sides, and a bleeder. Isolate the coil, cut it out and pipe in unions. Then take everything back to the shop for an acid wash and new insulation. Pretty gross in there. I wonder what the blower wheel looks like.
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You need to clean that with a hose. Some combination of coil cleaner and a degreaser like simple green. Lubricate the motor bearings that probably never have been. It is all a potential can of worms but you can't just leave it like that. I'd be more worried about the electrical, motor bearings, and insulation than breaking the sealed system. Can probably support the coil with some wire tied to something.
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Looks like a fan coil to me.You can get some coil cleaner clean it out wash it down protect the motor and replace the insulation. You can buy sheet Armaflex and scrape the metal off and spray glue it on. I would disconnect the coil and pull the whole thing and clean it outside with a hose.
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I got an AC tech (who I trust - he did work for me in the past) to quote me to clean the units.
He quoted me a fair price to clean on site. He's going to lay down a protective tarp, pull the units, spray the condenser and evaporator coils with appropriate cleaners and wash off with water.For 25% more hes going to take the units to his shop, power wash off the dirt & grim. Clean the condenser and evaporator coils with appropriate cleaners and rinse off with water. Vacuum out the blower wheel. Return the units in the evening.
Seems like a no brainer to have him take it to his shop.
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I still don’t see a condenser or evaporator coil!
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The evap coil is behind the metal shield to the left of the blower. The condenser coil is outside facing.
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