wiring help

ed wallace

need help on wiring have 2 hydro air air handlers piped for a/c and heat plus 2 zones of baseboard the idea is on mild days hydro air will heat housw on cold days baseboard will heat house maybe use hydro air as back up heat source what do i need to get this working perferably using a digital tstat

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Ted_9

Get 2 stage heat 1 stage cooling digital programable t-stats.

You BB is the 1st stage and the hydro air is 2nd stage right?

Firedragon_4

Look into a hydro-air panel from

Argo, Honeywell, etc. Saves a ton of time and makes it very easy.

ed wallace

wiring help

yes baseboard is 1st stage hydro air is second stage what i need is a wiring diagram to make it work

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don_42

maybe

> yes baseboard is 1st stage hydro air is second

> stage what i need is a wiring diagram to make it

> work

>

> _A

> HREF="http://www.heatinghelp.com/getListed.cfm?id=

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don_42

I

dont know Bill even with the two stage stat,I would think there will either be some short cycling or one never coming
on anyway to help out.

Looking at it where most baseboard emitter is design for
the coldest day of the year,that to me says that the second stage will never come on unless it goes below design temp.

Unlike a heatpump that loses some capacity as it get colder,that why we have to design around balance points or
we have to stage the equipment internally,gas valve and
variable motors if you will.

Even if you get lucky and can find a two stage split subbase
tsat,or you sure they make one to bring the fan on thru the
second stage?

I guess what I'm trying to say is if both system were design
for the coldest day of the year,then why even have a setup
like this?

I know and it stink,you need one for true comfort and one for indoor air quality,whats a man to do?

Thanks Bill for the post,and I not trying to be a butthead
with my question..Just trying to understand why people feel
that they need two heatplants,and how they go about there
design to make them complatible between the two.

Mitch_4

Some questions

Are the 2 air handlers going into 1 duct system? or 2 separate duct systems. And is your boiler sized to run all 4 zones simultaneously? ie the fan coils will add supplemental heat to the BB system in the 2 zones should they not keep up. If the boiler is too small, it won't work

I too do not understand the methodology behind this system.

Can you clarify?

Joe Mattiello

Taco, HAFC control panal

Try the Taco, HAFC control to facilitate the wiring for the air handlers. For your convenience I have attached the catalog, and submittal data information.

Taco, Inc.
Joe Mattiello
Technical Service Technician
joemat@taco-hvac.com
401-942-8000 X 484
www.taco-hvac.com

Paul Rohrs_2

Work with me on this.....

I threw a JPEG together on my Visio program. I put the baseboard heat (zoned by circulator) on pumps P1 and P3 and have used a tekmar or Wirsbo 512 series 2-stage control. The baseboard will be the 1st stage of heat on heat control or zone, then the air handlers will be the backup andor 2nd stage of heat. For the sake of time, I did not detail out the air-handler wiring from the fan control (CRYGG). Let me know If I can change a detail or two to make it work more towards your application. We could easily put on an EXP series pump relay or tie in a reset control for the baseboard.

Regards,

PR

Paul Rohrs

Still thinking about this.

Revised the drawing a bit. Don't know if you are zoning the baseboard with zone valves or circ's.

regards,

PR

ed wallace

wiring diagram

that is exactly what i need nowif i can figure out how to make it a bit smaller i can print it out
thank you Paul

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Mark J Strawcutter

as I reread your original post

it sounds like on mild days you want the hydro-air to be primary but on cold days you want it to be secondary?

Mark

Mark J Strawcutter

how does this meet the requirement

that on mild days the hydro-air will heat the house?

Mark

ed wallace

wiring help

i can live with the way that wiring diagram is set up the hydro air can be the 2nd stage of heat

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