Questions tagged [zoned-heating]

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Are 8-Zone Wiring Centers Compatible With Smart Thermostats?

I'm looking at various wiring centers for gas boiler heating and I'm wondering if they're compatible with the major smart thermostats, such as Nest, Hive, and Honeywell. Wiring Centers: Reliance:...
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Honeywell Truzone Panel Power Issue

I redid pieces of my zoning system a few months ago but we had such a mild winter the furnace barely went on. Now that we're getting towards summer the old problems that I had are reappearing. I was ...
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Why is one of my four baseboard heat zones not working?

No heat in baseboard. How to bleed just one zone. Thanks! Please see picture. ? I have a 4 zone valves. 1) water heater (works) 2) 1st floor air handler (works) 3) 2nd floor air handler (works) ...
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1answer
37 views

HVAC Heat only comes on when Fan is set to “ON” (not Auto)

have a weird problem that JUST started happening. When I turn the thermostat up with the fan set to "AUTO", nothing happens. The furnace does not light and the fan does not come on. This worked fine ...
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35 views

Boiler Zone issue after thermostat install

I just bought a new to me house, built in 1970. I replaced the old mercury thermostats with new programable digital ones. They worked great for the first 12 hours. Kept and read temps like it was set. ...
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1answer
17 views

Does manual operation of a Taco 570 series zone valve operate the boiler?

I have a home with multiple zones with the valves mentioned in the question. The documentation (http://www.taco-hvac.com/uploads/FileLibrary/100-3.pdf) isn't clear about whether contact 3 is ...
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27 views

Nest Thermostats: Balancing temperatures between zones

So, I'm wondering if there's a way that I can program my Nest thermostats to help moderate temperature disparities between my first and second floors. Here's the situation: I have forced air from a ...
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54 views

Zoned 2 stage heat pump system, aux heat not engaging

Homeowner here...I have a 2 stage heat pump split system with the ducting zoned for 2 zones. The units are as follows: Compressor: Goodman GSZC16 heat pump Zone control board: Honeywell HZ322 ...
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20 views

Strange behaviour with 4 zone central heating timer (John Guest TM4 / Heatmiser TM4)

I have a 4 zone heating timer (HW, Underfloor Heating, Towel Rail and the 4th zone is unused). I moved into a new build a few years ago. After 3 years my heating timer unit (John Guest TM4) started ...
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2answers
53 views

Why does a system boiler with hot water cylinder not use a diverter valve?

I understand that it doesn't need a diverter valve... But I was thinking, couldn't the system be more efficient with one? For example, the central heating could run at a low temperature (35°-40°) and ...
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5answers
2k views

Most cost effective thermostat setting: consistent temperature vs. lowest temperature possible

The problem: Our heating bills are about 25% higher than our average neighbors according to our bill, yet our temperature is always as low as we can stand it (mid 50's), we have excellent insulation ...
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2answers
577 views

HZ432 and no heat in one zone

I have 4 zones... The following lights are on the HZ432: Heat 1 - red Heat 2 - red Heat 3 - no light Zone 1 - yellow Zone 2 - red Zone 3 - red Zone 4 - red I have heat in 3 zones, but not in one of ...
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1answer
6k views

Are these red lights on my Honeywell HZ432 why my bedroom isn't blowing in heat?

I just moved into a new multi-family house with central heat/AC and the 3rd floor bedroom doesn't seem to warm up very well. When the thermostat is on, I don't feel hot air blowing in from the vents ...
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1answer
293 views

Zone Controller T-Stat Wiring w/ 24V transformer, isolation relays for 2 zones

I have a new Navien SmartZone+ 6-Zone Control for my boiler-based heating system. It is great, except it provides no power on C. I realize the internet has researched the heck out of adding a C ...
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37 views

Heat pump can't get a zone to 72° F

I have a heating system with both a heat pump and a boiler. The rule for the system is that if the temperature in a zone is 5° F less than called for, then the boiler will come on, but otherwise the ...
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1answer
182 views

Whole house humidifier when furnace is in unconditioned space

I have 2 furnaces, one in the garage and one in the attic. These are both spaces with unconditioned air, so they get very cold in the winter. The contractor who helped me configure my garage furnace ...
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716 views

How to wire a Taco zone valve controller with ecobee

I'm having an issue with wiring my Weil McLain gas boiler. It was wired up fine and working for a single zone. I added (2) 4 wire zone valves in. So I now have 2 zones, a Taco zone valve controller(...
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1answer
2k views

Can you use 1 ecobee thermostat to control 2 zone valves for heating?

I previously had a single zone set up with 1 circulator. So i added an extra zone. Still have 1 circulator pump and I also picked up a tacozvc 403-4 box to set it up. My question is how can i ...
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3answers
2k views

What are normally-open hydronic zone valves used for?

In a hydronic (hot water) heating system electronically operated valves control whether hot water runs through a particular zone of the building, or not. It seems to be a common setup for the valve ...
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2answers
225 views

Difference between geothermal and regular hydronic zone valves

Taco makes two variants of zone valves - one type for general hydronic use, and another type marketed especially for geothermal use. What is the difference in valves that particularly suits them for ...
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0answers
45 views

Some baseboard in one zone are getting hot and some are not

So I have one zone with two split loops. One loop is getting hot, the other is not. In the boiler room where the zone splits into two loops i can already feel that one is hot and one is barely warm. ...
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254 views

Nest + opentherm + zone valve

I have a Nest 3G, I'm now considering to change my boiler due to age-related issues. Can someone tell me if I can connect the Heat-Link to both zone-valve (on/off contacts) and boiler (OpenTherm). I ...