Thermostat Options for EWC-ST Series Control Panels

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gregwink
Posts: 3
Joined: Wed Feb 05, 2014 2:03 pm

Re: Thermostat Options for EWC-ST Series Control Panels

Post by gregwink » Thu Feb 06, 2014 9:06 am

Erik,
Thanks for the swift reply.
I heard about this switch from a previous post.
Is this the switch to which you refer? - http://www.ewccontrols.com/acrobat/090375a0222.pdf
If so, is there somewhere I can go/see the instructions or guide to learn how it is wired to the EWC ST 2E?
Or can I reach out to you to guide me on how to install such a switch?

Many thanks...
-Greg

gregwink
Posts: 3
Joined: Wed Feb 05, 2014 2:03 pm

Re: Thermostat Options for EWC-ST Series Control Panels

Post by gregwink » Thu Feb 06, 2014 12:16 pm

Erik,
I have done some reading, and I found out how to install that MCX-DXB switch to work with my EWC ST 2E panel.

One more question: Since this switch is taking over the master "function", that is to say that the MCX-DXB will now control the [cool/off/heat] and the [on/auto] functions, the two nest thermostats I will be installing - both of them - will now act as "slaves". The question is this: Is there a way to power both of these two nest thermostats with 24v current from the panel? Do I run a wire from the "c" block from each of the tstat blocks (both of the zone 1 and zone 2 blocks on the EWC ST 2E have them) to the "c" receptacle on each of the nest thermostats? Will this method provide power to both of the nest thermostats?

If that is the case, once I do that wiring - I should be done.
Many thanks...
-Greg

gregwink wrote:Erik,
Thanks for the swift reply.
I heard about this switch from a previous post.
Is this the switch to which you refer? - http://www.ewccontrols.com/acrobat/090375a0222.pdf
If so, is there somewhere I can go/see the instructions or guide to learn how it is wired to the EWC ST 2E?
Or can I reach out to you to guide me on how to install such a switch?

Many thanks...
-Greg
Erik W. wrote:You need to use the MCX-DXB switch if you are using nest thermostats. The problem is not your zone 2 thermostat but actually the zone 1 stat. The zone one or master thermostat needs to have separate o and b terminals which the nest does not have. Installing the switch will allow you to use nest thermostats in all zones.

Erik Wnoroski
EWC Controls, Inc.
385 State Route 33
Englishtown, NJ 07726
800-446-3110 ext 483

Erik W.
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Location: Englishtown, NJ
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Re: Thermostat Options for EWC-ST Series Control Panels

Post by Erik W. » Fri Feb 07, 2014 8:17 am

Greg,
You are correct, connect a wire to your ''C'' terminal on both the panel and thermostats to run the nests on 24v.

Erik Wnoroski
EWC Controls, Inc.
385 State Route 33
Englishtown, NJ 07726
800-446-3110 ext 483

bradjmarr
Posts: 3
Joined: Wed Oct 31, 2012 4:13 pm

Re: Thermostat Options for EWC-ST Series Control Panels

Post by bradjmarr » Wed Jan 07, 2015 3:30 pm

Now that I purchased the NCM-300, I'm wondering what to do with the o and b wires from the old st series since the ncm has an o/b hookup. Any advice would be appreciated. Thanks!

Paul Z.
Posts: 181
Joined: Thu Dec 08, 2011 3:05 pm

Re: Thermostat Options for EWC-ST Series Control Panels

Post by Paul Z. » Thu Jan 08, 2015 8:37 am

You might want to conceder changing your zone board to a NCM-300 then you can use ant thermostat. With the ST the best you can do is a Honeywell 4110 series in zone #1 and any type in zone #2. Call and we will help you if needed.

mausland
Posts: 1
Joined: Tue Feb 17, 2015 2:17 pm

Re: Thermostat Options for EWC-ST Series Control Panels

Post by mausland » Tue Feb 17, 2015 2:23 pm

Erik,

If I buy the NCM-300 so I can use a Nest, is it as simple as moving the wires like for like to the new board? I've included a picture of the existing ST-2E.

I understand I will re-purpose the O or B wire as a Common. Is there a standard or recommendation as to which to use?

Thanks,

Mike
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WyattScott
Posts: 4
Joined: Wed Apr 06, 2016 3:48 am

Re: Thermostat Options for EWC-ST Series Control Panels

Post by WyattScott » Wed Apr 06, 2016 4:05 am

I have essential gas for heating and central a/c for cooling. I am thinking the B and O are for heat pump?

However, from EWC control panel where it says SYSTEM, there is no B and O wires there
My blog - review of the best shower heads

WyattScott
Posts: 4
Joined: Wed Apr 06, 2016 3:48 am

Re: Thermostat Options for EWC-ST Series Control Panels

Post by WyattScott » Wed Apr 06, 2016 4:05 am

I have essential gas for heating and central a/c for cooling. I am thinking the B and O are for heat pump?

However, from EWC control panel where it says SYSTEM, there is no B and O wires there
My blog - review of the best shower heads

Paul Z.
Posts: 181
Joined: Thu Dec 08, 2011 3:05 pm

Re: Thermostat Options for EWC-ST Series Control Panels

Post by Paul Z. » Wed Apr 06, 2016 8:47 am

Looking at your board it will be a wire for wire, you will not use the "O"or"B" wire. You can use one of these conductors for a "C".If needed. Any question please call 1-800-446-3110 X490.

DanCaron
Posts: 1
Joined: Wed May 11, 2016 10:24 pm

Re: Thermostat Options for EWC-ST Series Control Panels

Post by DanCaron » Wed May 11, 2016 10:31 pm

I have an EWC-ST-2C. And I replaced the old manual stats with two zwave stats (https://www.remotec.com.hk/wp-content/u ... 140702.pdf)

Heat works great. However, my AC compressor will not turn on. Any ideas?

If the stats are incompatible, are there zwave stats that will work?

Dan
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