Need help installing a Robertshaw 9870i thermostat

[techcan]

I bought this Robertshaw 9870i thermostat online and having some trouble installing it in my home. I'm trying to replace my existing Honeywell CT3200 thermostat so that I could combine the humidistat and thermostat as one unit. Basically I have 5 existing wires:

- 2 wires control the humidifier (humidistat) - 3 wires connected to the the existing thermostat (honeywell CT3200) ** Red wire is connected to the Rc terminal (which has a jumper to the R terminal) (Power) ** Black wire is connected to the W terminal (Heat) ** Green wire is connected to the G terminal (Fan)

How do I connect these wires to the Robertshaw 9870i thermostat?

By looking at the installation manual that came with the Robertshaw unit, I should be doing the following (pls correct me if I'm wrong):

Humidistat: - Connect one wire to the Common 24 VAC (C terminal of Robertshaw Thermostat) - Connect other wire to the H terminal which is the humidification relay

Thermostat: - Connect Red wire to the Common 24 VAC (C terminal of Robertshaw Thermostat) - Connect Black wire to the W2 terminal of Robertshaw Thermostat - Connect Green wire to the G terminal of Robertshaw Thermostat

Am I correct? Do I need to set any jumper? Please help. Thanks in advance.

TK

[Bob_Loblaw]

[e-mail] wrote

You need to pay a professional before your melt your transformer or fry your circuit board. It's one of those jobs that you either know how to do it, or you don't. You don't.

[Noon-Air]

Can't tell you a thing... can't see it from here, cant see what equipment its controlling, or how its configured. Is it a heat pump?? gas heat?? dual fuel?? Are the control voltages the same between the system and the humidifier?? do they have seperate control power sources??

*NOBODY* can tell you without a whole lot more information.

Your best bet is to call a local tech..... oh wait a minute... you got that H'well stat from the big box store... and the RS stat from the internet....... never mind

[Stormin Mormon]

At least the poster is consistent. Bought the stat on the net, and looking for install instructions on the net, well, usenet that is.

We recognize good attributes where they are found.

[Bubba]

I would contact the "Online" company you purchased it from and ask them. Bubba

[gofish]

How will you be paying for my expert advice and wiring instructions? Do you have a paypal account?

[daytona°]

Actually humidifier manufactures suggest to mount humidistat in the return air duct to measure the humidity from the entire residence for a better coverage of moisture....so you must be too lazy to go the furnace to adjust the humidistat

[techcan]

hello folks... just to update that i got this figured out. imho, you don't need a professional to do this kind of stuff. it's just hooking up some wires and test ... what's so hard about that? anyway, thanks to internet (full of information), i know exactly what my problem was...

I highly recommend this site:

learn the basic of your hvac system...

[Noon-Air]

Apparently the "simple" task had sufficient difficulty that you had seek professional help.

[techcan]

[Justin]

Yes, but do you "UNDERSTAND" why?