Programmable Water Feeder

lilzane

Looking for some help here if possible, I have Burnham Furnace V904A. Looking to install Programmable water feeder, but I'm minus 1 taping. I currently have a McDonnell Miller Mechanical Water Feeder With LWCO Function. and secondary LWCO for saftey. is there any way I can do this.

Jamie Hall

Are you looking to install a programmable feeder, or are you looking to install a low water sensor to trigger the feeder? Two different situations.

109A_5

Hello lilzane,

You probably don't need a tapping if you use the switch that the mechanical type LWCO may already have, then a Hydrolevel VXT-24 Water Feeder, for example, is just added to the existing water feed piping.

All depends what your goals actually are.

lilzane

Jamie I'm looking to install programable feeder and 2 LWCO but I only have 1 Tapping for LWCO

lilzane

I Just want to get rid of Mechanical water feeder add a VXT-24 OR VXT-120 and 2 LWCO

EdTheHeaterMan

can you keep the existing MM mechanical and remove the water feed piping from it? Then put the water feed pipe on the new VXT-24? That way you will have the programmable water feed and 2 LWCOs.

lilzane

I'm going to take a look at it, by the way can I use the VXT-120 I don't have 24 volts at the furnace. I will post back tomorrow, the unit is at my rental property. By the way thanks for the help.

109A_5

The VXT model and the LWCO need to match the system control voltage being used.

lilzane

Hi Ed the heater man here is my setup what do you think

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109A_5

Probably have to do something like this.

Personally I would prefer the redundancy of the different technologies for the LWCO service. I would just change the water feeder if the old one is problematic. However they all need maintenance at some point.

EdTheHeaterMan

OK this is what I would do with your situation and the reason's why.

1. The #47-2 is the primary operating LWCO and will act first to shut off the burner
2. The electronic LWCO appears to be a Manual Reset type so we do not want to use that as the primary.
3. The #47-2. has a SPDT switch that can operate a VXT feeder
4. You need to use the 120V model water feeder.

Here is the diagram (as best as I can determine. the order of the limits may be different.)

This is a diagram from Burnham that has been modified to your system. The orange shaded area is the oil burner and has not been modified. The blue area is the additional limits that are not factory installed. the white ares is what the factory installed. The blue area also has the VXT-120 water feeder. Just disconnect the pipes from the mechanical water feeder and connect them to the VXT water feeder.

By using the NO contact on the #47-2 switch, you can feed water based on the timing and delays that you can program into the VXT.