Help with OLD Honeywell gas valve V155A2C9

RJBabcock

I have a rental property that has a very old gas furnace with a Minneapolis-Honeywell V1552C9 electric gas valve. I am not getting 24v up to the thermostat. It has a set of gears, cams and switches with a motor attached (actually a very well made piece of equipment! I can see why it has worked for so long!). I have no idea how to troubleshoot it and in desperate need of a schematic or wiring diagram. I would also like to know if there's a replacement available....

Thanks
Ross Babcock
St. Paul, MN

RJBabcock

Life is Good!

I think I found exactally what I needed in the library. I still welcome any advice or insight on how this thing works....

Ross Babcock

Unknown

V155 Motorized Gas Valve

a real work horse of a control. What it probably needs is some oil. If you look there are some small tubes that are there for putting in oil about once a year. The oil was made by Honeywell and is called FINOL. I am not sure if they still have it around. If not use 3 in 1 oil will do just fine.

I have a lot of material on this control if you are interested then e-mail me your postal address and I will send it off to you. My e-mail is gastc@cox.net

There is no direct replacement. It can however be retrofitted depending on waht other controls you have. Is this a steam system?

The fact that you are not getting 24 volts at the thermostat may mean you are not testing correctly or you need a transformer. What kind of thermostat do you have. This is a series 10 gas valve which typically had a DPST thermostat W to B was the starting circuit and W to R was the holding circuit.

On the gas valve itself if you pull the cover off you will see a wiring terminal board. The transformer is wired to "T" "T" terminals you should have 24 volts there if you do not make sure you have 120 volts power and locate the transformer and see if you have 24 volts across the secondary. Many time on those old systems the transformer may be on a wall somewhere remote from the heating systems.

Unknown

Ross, I am also posting

here because I do not want you to do something unsafe. In your e-mail you said you had the valve running on bypass. DO NOT I REPEAT DO NOT LEAVE THAT VALVE ON BYPASS. IT HAS NO LIMITS WHEN IN THE BYPASS MODE AND IS UNSAFE!!!!