PDA

View Full Version : Hotel heat pump coils



Justin-hvacguy
07-19-2016, 04:30 PM
I'm working at a hotel. We're having trouble where some of the room units constantly ice up

heatingman
07-19-2016, 06:13 PM
Are these PTAC units? Are they new or old?
Has anyone put gauges on them?


Sent from my iPhone using Tapatalk

Justin-hvacguy
07-19-2016, 07:59 PM
They are Vtac units with a closed loop hydronic system, guess all the rooms are tied together? The building is about 25-30 yrs old. I don't believe gauges were put on. Every day they freeze up

heatingman
07-19-2016, 08:49 PM
Water source heat pump?

What temp is the water loop running? Once thawed, what kind of discharge air and return air do they have?


Sent from my iPhone using Tapatalk

Justin-hvacguy
07-19-2016, 10:19 PM
The loop is at 80 degrees. The unit has a water in and out..

buford
07-19-2016, 11:49 PM
When was the last time the evap coil and blower were Properly cleaned.:whistle:

BALloyd
07-20-2016, 12:18 AM
When was the last time the evap coil and blower were Properly cleaned.:whistle:
Half past never? [emoji14]

Sent from my SM-N910W8 using Tapatalk

johnnyb
07-20-2016, 01:06 AM
I'm working at a hotel. We're having trouble where some of the room units constantly ice up low charge or low air flow due to ...?????dirt,capacitor,motor,curtains blocking evaporator,stat set too low,

Justin-hvacguy
07-20-2016, 08:00 AM
I was thinking low charge, but no gauge ports

beenthere
07-20-2016, 04:44 PM
Pull a filter on one of the ones that freezes up, and look at the coil. Its probably very dirty. Clean all of the evap coils. Then if they still freeze up. Get piercing valves and check the charge.

Dr Love
07-20-2016, 04:59 PM
Get piercing valves and check the charge.

Won't they eventually leak?.... Guess it won't matter if the system is already leaking, huh.. :whistle:

beenthere
07-20-2016, 05:35 PM
Won't they eventually leak?.... Guess it won't matter if the system is already leaking, huh.. :whistle:

Can always put in permanent valves later.

buford
07-20-2016, 10:33 PM
Depending on the age and how difficult they might be to remove, and they will get easier to remove,once you get a into a couple of them, take them down and do a PROPER complete cleaning. Those type of units rarely even get those quality filters you are using changed.

Poodle Head Mikey
07-20-2016, 10:37 PM
Next time they are renovating a room or two - talk them into letting you pulling the units from those rooms and taking them outside to REALLY clean them well. Blast the coils and the chassis entirely dirt free before reinstalling them.

1. Until you do that you will be chasing your tail and will only end up looking stupid in the end.

2. 90% of 'the problems' will likely go away on their own after the through cleaning.