RC-1000 or RC-2000

[hurricne]

Hello,
 
New to the forum - Can't seem to find an answer to this question.  Not sure if I need a omnistat2 rc-1000 or rc-2000.  I need to replace omnistat rc-112 models.  We have two geothermal units with multiple zones.  It is a carrier 50ydv model.  I do not need humidity control through the thermostat.  These are currently connected to a hai ominpro II. 
 
Any help would be appreciated.
 
 

 

[pete_c]

Welcome to Cocoontech hurricne!
 
There are many folks here with HAI OmniPro panels using Omnistat 2's (either model).
 
Here went from an RC-80 a few years back to the Omnistat2.
 
I am guessing without no need for humidity control then an RC-1000 will do you just fine. 

 

[Desert_AIP]

The RC 1000 is basic but supports most single family home type systems. 
It only support two stage heat and single stage cooling.
 
The RC 2000 handles up to 3 stage heat and two stage cooling.
 
The docs specify the RC 2000 for Geothermal. 
It's possible the anticipator logic is different for that type of system than a standard heat pump and that logic is not programmed into the RC 1000.
 
The RC 2000 gives humidity display and a humidity sensor to the Omni Pro - not just control over a humidifier.

 

[pete_c]

Thank you Desert_AIP.  I didn't know that.  I don't pay attention much to the Omnistat 2 these days as it just works. 
 
This past winter though keep the whole house more humid than normal and used (new Honeywell Humidifier) an additional humidifier in the bedroom; but didn't go to the swampy level of humidity.   (house ~35% bedroom ~45%).  Old house had two zones and current home while larger has only one zone.
 
So how would hurricne connect an Omnistat 2 2000 to his two geothermal units / multiple zones?

 

[Desert_AIP]

I have two RC 2000s and an RC 1000
 
The RC 2000s are hooked into a zone controller.
The zone controller controls the traffic flow for heating and cooling calls.
The zone controller operates the equipment, not the thermostat relays.
It protects from short cycling if one zone shuts off and then another immediately makes a call for heat/cooling; and prevents clashes if one zone calls for heat while another calls for cooling.
 
The RC 1000 operates a bathroom electric heater in the Master Bath.
Since it is independent, it doesn't need to go through the zone controller, but it is automated through the Omni Pro.
 
Something like a hydronic system may not need a zone controller because each zone is operated by an individual valve on the manifold, and all valves draw from a single heat source.
 
But I expect a geothermal heat pump operates in a similar fashion to an air source heat pump.
Requiring a zone controller to manage the traffic.
 
If the zone controller is already hooked up and there are already thermostats hooked to the zone controller, then swapping out the thermostats with RC 2000s is straight forward.
That's what I did here.
It just sounds like he has more zones than the two I have.

 

[hurricne]

This is great information, thanks for the replies.  There is a honeywell zone controller hooked up already, so it sounds like I will need the RC-2000s, and switch them out similar to what you did desert.  I was also led to believe that the really isn't much additional or extra programming that needs to be done - is that right?
 
Thanks again

 

[ano]

This is great information, thanks for the replies.  There is a honeywell zone controller hooked up already, so it sounds like I will need the RC-2000s, and switch them out similar to what you did desert.  I was also led to believe that the really isn't much additional or extra programming that needs to be done - is that right?
 
Thanks again

depending on which Honeywell zone controller you have, the RC-2000 may or may not benefit you. If you have several thermostats, and several zones, the zone controller can control a multistage HVAC unit without a multistage thermostat.  For example, it could activate stage 2 when more than one zone is calling for AC/heat, or it could activate it after a set period of time. There are many options.  Unless you don't care about the extra money that RC-2000's cost, you may want to wait to see how the zone controller is configured before purchasing the RC-2000's.

 

[Desert_AIP]

Good info ano
 
I went with RC 2000s because I really wanted the humidity sensor and display.
 
I still wonder about the anticipator logic programmed into the T-stats since the docs specifically identify geothermal in the 2000s.
HAI/Leviton tech may help answer that question.

 

[hurricne]

To handle 3 stage heat and 2 stage cooling and variable blower speeds on a geothermal unit, it looks like RC-2000 is my safest bet, so I'll pull the trigger.  Thanks very much everyone for the input.  Great forum!

 

[philgrocks]

Hi read thru this topic.   I'm converting from HAI RC-120 to RC-2000.  
 
The question is that in the manual for the RC-2000 it gives several options for "System Type".  One is "Zone Control".   Other is "Conventional".
 
What is the difference between these settings?
 
Thanks
 
phil