Honeywell Automag Thermostat question

Jimbo

unread,

Oct 19, 2003, 9:57:24 PM10/19/03

to

Hello!

I have done some looking on the web, and some calling around town here
(Traverse City, MI) but I haven't found any answers.

I have a 3 wire 2 zone Honeywell automag hot water furnace, with a
Utica boiler. For the most part, I love it (but for a frozen pipe that
scared me last year Ugh!, it has been great).

However, I would really like to have a programmable thermostat so that
I can get up in the morning and have a warm house. The thermostats
available to everyone else seem to all have the 3 wire hot water
furnace as an exception. And the local Heating and Cooling guys here
didn't know anything about it.

Are there programmable thermostats out there for a 3 wire hot water
system?

Thanks!

Jim Whall

whal...@DONOTSPAMMEev1lDEWERSyahoo.com

ss...@bcplnospam.net

unread,

Oct 20, 2003, 11:20:08 AM10/20/03

to

I have a Honeywell programmable thermostat which has given me trouble
free service for about 8 years and counting in a gas fired, forced
air, single zone heating system and a central a/c system. As I
recall, there was an "800" help number for Honeywell included in the
directions. Have you tried contacting Honeywell? Have you looked at
Honeywell's web site for info? I think contacting Honeywell could
get you a definitive answer.

Stan

{Delete nospam for email}

George Elkins

unread,

Oct 21, 2003, 9:14:10 PM10/21/03

to

I have a similar situation. From brief investigation of thermostat
replacement in my house, I found that many electronic thermostats are
powered from the 24vac control circuit itself and that's a problem when
certain zone valves are used (e.g. Taco zone valves in my case), but I'm not
entirely sure why (I suspect it gets insufficient power intermittently). In
that situation, I think it's possible to use a battery powered thermostat, a
thermostat which requires a separate 24vac power conductor, or to wire an
isolating relay in the circuit to control the zone valve. This isolating
relay idea seems promising because it seems like it would allow installation
of any thermostat. I also haven't yet succeeded in finding a local heating
professional who has a clue what I'm talking about.

George Elkins

"Jimbo" <whal...@netscape.net> wrote in message
news:39dc599a.03101...@posting.google.com...

Tony Hwang

unread,

Oct 21, 2003, 9:34:39 PM10/21/03

to

Hi,
There is heavier rated 24V transformer you can replace with. As an
example, my door chime can't operate on regular duty 24V tranny. Gotta
have a bigger one to drive the motor on the chime. Any digital parts
don't work on AC, that 24V AC is rectified into a DC voltages within the
thermostat. If 24V supply does not have enough Amparage to suppy juice
for worst condition(all the zone valve is coming on, a/c or furnace is
starting all at once could be the worst case. Probably the therstat has
a current requirement on it's spec. See if it is drawing that amount of
steady current all the time without dipping.
Tony

Hark

unread,

Dec 22, 2016, 8:14:04 AM12/22/16

to

replying to Jimbo, Hark wrote:
I realize this is a 13 year old post, but I decided to answer for anyone else
looking for an answer to this question too.
This link is to automag's website and the thermostat they claim are
comparable. http://www.automagzonevalve.net/thermostats.php

--
for full context, visit http://www.homeownershub.com/maintenance/honeywell-automag-thermostat-question-479387-.htm