Thermostat Options for EWC-ST Series Control Panels

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stefandalan
Posts: 2
Joined: Sun Dec 05, 2010 10:14 am

Thermostat Options for EWC-ST Series Control Panels

Post by stefandalan » Sun Dec 05, 2010 10:28 am

Hi,
I have an EWC-ST-2C with two zones. The thermostats are original to the house and are old, non-programmable, and contain mercury. The master thermostat (zone 1 first floor) is from White Rodgers, model type 1F56W-444. The slave thermostat (zone 2 second floor) is an Ultra-Zone from EWC, type 1F35-613.
What are my options for new thermostats (for zone 1 and zone 2), preferably programmable? I tried a couple of Honeywells (RTH2300 and CT31A) with no sucess.
Thanks, I'd appreciate any help.

Stefan Dalan
Grafton, MA

Eric K.

Re: Thermostat Options for EWC-ST Series Control Panels

Post by Eric K. » Mon Dec 06, 2010 10:45 am

Here is a list of programmable thermostats that EWC Controls has confirmed to work properly with the ST Series of Control panels.

EWC Controls Model EWT-3707
White-Rodgers Model 1F80-361
Robertshaw Model 9610
Honeywell Model TH4110D1007

Eric

nlagaros
Posts: 4
Joined: Sat Nov 27, 2010 7:27 pm

Re: Thermostat Options for EWC-ST Series Control Panels

Post by nlagaros » Mon Dec 06, 2010 11:55 am

I had the same zone controller and wasn't satisfied with available options for thermostats. I specifically wanted to install Venstar thermostats in all zones. I purchased the NCM300 and installed this past weekend. It turned out great - quality controller and has status lights so you can see exactly what it thinks it should be doing.

stefandalan
Posts: 2
Joined: Sun Dec 05, 2010 10:14 am

Re: Thermostat Options for EWC-ST Series Control Panels

Post by stefandalan » Mon Dec 06, 2010 12:14 pm

I like options! And no issues with the seond zone? Same thermostat for both zones?

nlagaros
Posts: 4
Joined: Sat Nov 27, 2010 7:27 pm

Re: Thermostat Options for EWC-ST Series Control Panels

Post by nlagaros » Tue Dec 07, 2010 7:24 am

I was able to use Venstar 1800 in all zones. The only thing I had to be concerned with was having enough wires in the secondary zones. I had only 3 wires available and had to use the Venstar add-a-wire kit to have 4. I used one for R, C, W, Y and tied together W & G on the controller so the fan turns on with heat for the secondary zones. I had enough wires to have G independent in the main zone.

Eric K.

Re: Thermostat Options for EWC-ST Series Control Panels

Post by Eric K. » Tue Dec 07, 2010 8:52 am

When using the NCM-300 the 4th wire 'G' is not necessary unless you want fan only operation from that thermostat.

winkyonthewater
Posts: 2
Joined: Mon May 16, 2011 10:55 pm

Re: Thermostat Options for EWC-ST Series Control Panels

Post by winkyonthewater » Mon May 16, 2011 11:49 pm

I live in SE Texas and have an EWC-ST-2D with two zones (gas heating and A/C). I am like stefandalan with both thermostats being old mercury bulb Ultra-Zone type 1F35-613. I assume the Honeywell Model TH4110D1007 would be compatible for my zone 1 thermostat as well? If so, which wiring diagram would I use? Offerings in the manual are:

1. Typical 1H/1C system: 1 transformer
2. Typical 1H/1C system: 2 transformers
3. Typical 1H/1C heat pump system--this one seems to match the closest, but I don't have a heat pump

Any other settings to consider during set up? Thanks.

Pcyrana

Re: Thermostat Options for EWC-ST Series Control Panels

Post by Pcyrana » Thu Aug 04, 2011 10:07 am

The wiring configuration you are going to use will not follow any of the ones depicted in the Honeywell manual.

With that thermostat I would follow figure #10 on the diagram from the link below.

http://ewccontrols.com/acrobat/090375a0115.pdf

bcatenzaro
Posts: 1
Joined: Sat Aug 06, 2011 6:31 pm

Re: Thermostat Options for EWC-ST Series Control Panels

Post by bcatenzaro » Sat Aug 06, 2011 6:35 pm

I am looking to purchase the Honeywell TH4110D1007 for my zone 1 thermostat, but which thermostat would be appropriate for zone 2?

Pcyrana

Re: Thermostat Options for EWC-ST Series Control Panels

Post by Pcyrana » Wed Aug 10, 2011 8:24 am

The Honeywell TH4110 thermostat will be appropriate for Zone 2 as well.

Other than that, any standard conventional Heat/Cool thermostat will work on Zone 2.

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