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Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I have a trane YCH120C3MOAB roof top package unit that is

Customer Question

I have a trane YCH120C3MOAB roof top package unit that is not wired to a thermostat or it is missing can anyone tell me what thermostat i need and how to wire it.
Thanks in advance.
Submitted: 1 year ago.
Category: HVAC
Expert:  airheatman replied 1 year ago.

I will be happy to assist you.

I will need to know what the wires are connected to in unit and model on your new thermostat.

Customer: replied 1 year ago.
THERE IS NO THEMOSTAT AT ALL, I HAVE JUST LEASED THIS SPACE WITH A ROOF TOP UNIT. IT IS BE MISSING ?
Expert:  airheatman replied 1 year ago.

Yes I understood that there is no thermostat .Are you saying there are no wires ran from unit to thermostat location?

Customer: replied 1 year ago.
I WENT ON THE ROOF THER IS A LOW VOLTAGE TEMINAL BLOCK WITH 1-20 TERMINALS
Expert:  airheatman replied 1 year ago.

Do you have letters on the low voltage terminals like R,W,Y,G,C?

Customer: replied 1 year ago.
ITS AN OLD PLASE I AM LEASING FOR A RESTRURANT. BEEN CLOSED FOE 2/3 YEARS
Expert:  airheatman replied 1 year ago.

Tell me what letters you have on the low voltage terminal

Customer: replied 1 year ago.
CAN WE TALK WHEN I AM ON THE ROOF TOP IN FRONT OF THE UNIT. ON MONDAY?
Customer: replied 1 year ago.
NO.
Customer: replied 1 year ago.
ONLY # ***** LVT.
Expert:  airheatman replied 1 year ago.

I run a local HVAC company so not sure if I will be in office or in the field.If you would like to do this by phone, we can exchange phone numbers and work over phone on Monday but the site requires an additional service fee for that.Let me know if interested and I will submit offer.

Customer: replied 1 year ago.
DOES THIS UNIT REQUIRE SPECIAL THEROSTAT,
Customer: replied 1 year ago.
CAN WE TALK ON THE PHONE WHEN I AM ON THE ROOF TOP
Expert:  airheatman replied 1 year ago.

Not sure if I will be online Monday.I am going to open to other experts in case I am not available.

Expert:  Phil replied 1 year ago.

Hello,

Please attach a well focused, close up photo of the wiring diagram glued inside the unit service panel, the picture needs to be taken from straight on, in very good light.

You can use the paper clip- icon at the right end of the tool bar at the top of this dialog box to attach it here. , Include a picture of the thermostat wire connections to the printed circuit board in the same area that will include terminal letters such as R,W,Y,G, C and a few others.

You can also use the 'attach files' link at the left of your send button if there is no paper clip icon.

We can go from there.

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