ZoningSupply.com - Zone Control

HVAC Zone Controls & Zoning Dampers

Support

hvac zoning

De-humidification and SmartZone - Zone 1 Thermostat Control

HVAC Contractors, Other HVAC, Supportzoning supply1 Comment

Although SmartZone does not have any built-in capabilities for controlling DE-humidification (DH) or Humidification, some applications are possible by using a thermostat on ZONE 1 that does have the capability to control DH.

“DE-humidification, in most residential systems, is simply running the equipment in COOLING with LOW speed fan instead of HI speed fan.”

Before we get to zoning, the equipment being used must have the capability to control humidity.  This usually means it has a terminal (DH/BK/DS) that is energized or DE-energized by a thermostat to control fan speed of the equipment.  Controlling fan speed allows the equipment to DE-humidify the air when the fan is running in low speed.

Back to zoning, using zone 1 thermostat to control DH is not as simple as wiring directly from the thermostat to the equipment.  PLEASE DO NOT DO THIS.  The equipment and the zone thermostats are running on different transformers and this will case problems and potentially damage to some components.  You could isolate the output from the thermostat with a relay to get around this issue of different transformers but you would still have an issue with this method of wiring "around" the zone controller.  The issue can arise when zone 1 calls for DH but the equipment is already running in heat, this mixed signal might just be ignored by the equipment but we cannot take that for granted... all equipment works differently.

ecojay smartzone de-hum using y2 -BASIC.JPG

The best way to control DH using SmartZone on single stage equipment is by using the method below.  It may seem a little UN-orthidoxed but it is a valid APP note from the engineer at Ecojay (It's intended to work this way).

  1. Select a DH enabled thermostat of your choice
  2. Connect Y2/ECO on SmartZone Zone 1 to Zone 1 Thermostat DH/DS/BK
  3. Connect Y2 on SmartZone Equipment toEquipment DH/DS/BK
  4. Set Zone 1 "STAT TYPE" to G2
  5. Set DIP switch #4 to "LOCKOUT"

Zone 1 thermostat will now enable and disable DE-humidification any time the equipment is running in the cooling mode.
NOTE: When starting cooling from OFF state, 90 second delay will occur before HIGH speed fan will energize.

Using this method we are assuming that the equipment is expecting DS/BK/DH input terminal to be ENERGIZED for high speed fan and DE-ENERGIZED for low speed fan.  This method should not be used for more than 3 zones or with multi-stage compressor equipment.

SmartZone-2X
sale
SmartZone-2X
$159.99 $199.00
Quantity:
Add To Cart
 

This application will work with Ecojay's SmartZone-2X and SmartZone-4X.  Learn more

Click for SmartZone-2X/4X Install Guide

Click for SmartZone-2X/4X Install Guide

Need more than 40VA to power LOTs of dampers on one SmartZone?

HVAC Contractors, Supportzoning supplyComment

Some systems with many small ducts leading to each zone can require lots of dampers.  The example below is a 2 zone system that requires 6 dampers per zone (12 total).  If you look at the zoning guide, you will find that you should budget for at least 55VA for this system... but you only have 40 VA transformers.  75 and 100 VA transformers can get VERY expensive!  Instead you can use two 40VA transformers, but not how you think.  It can be dangerous and unreliable to connect transformers in parallel to create ~80VA.  We recommend the method below that employs the use of a simple relay to separate half of the dampers to be powered from a second transformer and the other half being powered by the SmartZone and it's transformer.

See the SmartZone Install Guide to calculate required VA.

It is always necessary to verify that the PRIMARY side power is sufficient to power the transformer connected.  A dedicated PRIMARY circuit is best but not always possible.  If sharing the 110V or 220V circuit, make sure the total power required for all devices connected (including zoning transformers) doesn't exceed the capacity of the circuit (usually 15 or 20 AMPS).

Where to get a relay?
Any 24V relay with a DPST or DPDT configuration will work.  The one pictured in the above diagram is available at ZoningSupply.com (see below).   If you are chosing your own relay, the "Contact" current rating will determine how many dampers can be connected.  (For example: A 10 Amp relay can handle up to 10 power open, power closed dampers)

24V Relay - DPDT
24V Relay - DPDT
$14.99
Quantity:
Add To Cart
 
Power Motor Square LG2.jpg
sale
Power Open/Close Motor
from $69.99
w/ LEDs:
Quantity:
Add To Cart

2016: QUESTIONS from ONLINE CUSTOMERS

Support, homeownerszoning supplyComment

QUESTION: Will SmartZone replace Honeywell Trol-a-temp?

ANSWER: The SmartZone-4X is a "drop-in" replacement for all of the Honeywell boards.

Photo by spates/iStock / Getty Images

QUESTION: I live in Toronto, Ontario, Canada. Are there any qualified installers for the Smart Zone dampers?

ANSWER: Although we have customers in other parts of Canada, we do not have any specific HVAC contractor customers in Toronto. Any reputable HVAC contractor with previous experience installing zoning should be able to install the Ecojay SmartZone controls or dampers. Many do-it-yourself folks have also successfully installed Ecojay's controls/dampers without difficulty. If your contractor is not specifically familiar with SmartZone controls they can reach our technical support line, 844-ZONE-123, for assistance if needed. Feel free to contact us with additional questions.

QUESTION: I have an old DuroZone system (model SMZ-SW) that has stopped working and am looking for a replacement solution and have been researching the Smartzone option.  I have a few questions and wanted to see if you could help me.

  1. I'm not sure what has failed with the DuroZone system, but I wanted to first see if I replaced the controller with the Smartzone controller if it would work.  Will the Smartzone controller work with the DuroZone dampers ?
  2. Would you be able to put me in touch with an installer who could do the installation and testing of the smartzone controller ?  I'm not overly handy and would prefer a knowledgeable installer to do the install and tests.

ANSWER:

  1. Ecojay's SmartZone products are compatible with your current DuroZone controller.  Your existing thermostats and dampers are normally compatible with SmartZone.as well. Wiring the dampers into SmartZone may be different depending on the model dampers you have. We can provide damper wiring instructions when you or your installer inform us the damper models you have. 
  2. The change out of your existing Durozone controller should be simple for any competent hvac contractor even if they haven't used Smartzone before.  Zoning Supply can also be contacted for technical support toll free if you or the installer need technical assistance. 

QUESTION: I have a Honeywell Chronotherm 111 system with one main panel and three mercury thermostat controllers. I have been informed that my control panel is inoperative and three dampers have failed. I would like to upgrade the system with out
losing the capability/control of the temperature in each room. I am in dire need to correct/improve my system with the Honeywell product.

ANSWER: The Honeywell Chronotherm III thermostat (models T8600, T8601 & T8603) are 24VAC powered according to Honeywell's spec sheet and should be compatible with any Ecojay SmartZone controller.

QUESTION: My customer has a Carrier/Parker zone system, not sure what version. I want to replace the complete system minus the dampers. Currently there is a main controller, bypass controller and six zones. The bypass could be converted to a dump zone. Wireless is also an option. What do you think?

ANSWER:  From our knowledge of the Carrier-Parker controls, it is VVT control system  and Carrier released two generations of the product line that we know of.  One or both generations used dampers that had DC powered, multi-position actuators. Carrier has also tended to use a more proprietary control flow using a pulsed or multi-position damper actuator which do not have an internal stop switch.  SmartZone outputs 24VAC continuously on either the OPEN damper circuit or CLOSE damper circuit with the actuator using an internal stop switch to switch off power when it reaches stop in either open or close position. This is typical of most conventional residential/light commercial zone control brands and product-lines today. If your customer's current system does not match this specification you will need to change out the damper actuators if installing Ecojay SmartZone or any other major 24VAC brand control product. Ecojay's damper actuators have a torque rating of 18 in-lb/2 Nm and can work with a round or square shaft of 1/4" to 5/8" diameter.
SmartZone is expandable up to 20 zones, capable of 2C/3H stages and is compatible with any conventional 24VAC controlled equipment including heat pump or heat pump with dual fuel. SmartZone is also compatible with all off the shelf 24VAC thermostats. If you are able to supply the specific product model your customer is using I can probably be more specific about the compatibility issues.

SmartZone-4X
sale
SmartZone-4X
$229.99 $299.00
Quantity:
Add To Cart

QUESTION: I have a Honeywell Trol-a-temp Model MABS-2 422041-2 with a Mastertrol Add-a-zone model MAZ-1 TAT422027. This is a 4 zone electric system, heat pump with Emergency heat. I have the Master which control s the Emergency heat plus e thermostats. I would like to upgrade the Panel so that I can put a digital thermostat as the master.

ANSWER: SmartZone-4X will work for you.
http://zoningsupply.com/buy/smartzone-4x

QUESTION: I am looking to use this product with a 2 zone system that has 2 wire dampers. I have to power 4 dampers per zone. Will this produced do so? I am using 8" round dampers and there are 4 per floor.

ANSWER: All Ecojay SmartZone controls are compatible with 2 and 3 wire dampers. They can even be mixed on the same zone. SmartZone can support up to four 2 wire dampers (up to ten 3 wire dampers) on each zone.  Dampers and thermostats are powered from the SmartZone controller. It is important to determine the VA capacity of the transformer needed to power SmartZone as the number of devices powered from the controller increase. In your installation, the transformer used to power the SmartZone controller will need to support the power demand of the zone controller (12VA), 8 dampers (2-wire dampers at 7-10VA each), and 2 thermostats (2VA each). Total potential transformer VA demand from these components collectively total 96VA (12+80+4). However, assuming your 2 wire dampers are power close/spring open, power demand from the dampers will occur only when the dampers are closed. With a 2 zone system, you will never see both zones closed at the same time (all dampers default to open when no zones are calling) so your maximum power demand will be only from 4 dampers. This changes the maximum potential power demand to 62VA (12+40+4). A 75VA - 24VAC transformer will be capable of providing adequate power for your system. This size transformer is readily available on Ebay and many other web stores.  If your 2 wire dampers are power open/spring close (this type is typically used only for fresh air ventilation) then you will need a transformer with a VA capacity of 100VA minimum.  Visit our zoningsupply.com website and review the ZS2X/4X installation guide for more information on installation. Thank you for contacting Zoning Supply with your question. We appreciate your interest in our SmartZone products.

QUESTION: The 9580 thermostat uses delta T (difference between actual room and called for temps) as part of the staging calculation.  If the staging function of the thermostat is replaced by the zone controller, how does the controller get delta T, or is is not used?  If not, ow does it determine staging...is it rate of temp change sensed by the probe?

ANSWER: SmartZone uses algorithms based on time and supply air temperature (as measured at the supply air plenum) to control staging. Each time the equipment is started SmartZone will require a minimum run time in stage 1 before it will consider staging. This initial run time allows for the equipment to achieve a stable temperature in heat or cool before determining if staging up is necessary. After the initial run time requirement is achieved SmartZone compares supply air temperature to the cut-in temperature settings and will stage up if conditions are met. When the equipment is running stage 2 SmartZone will compare supply air temperature to the cut-out temperature and will return to stage 1 if conditions are met. SmartZone staging algorithms will vary the time and temperature elements based on equipment type (gas/electric or heat pump) and mode of operation (cool or heat). The SmartZone Installation manual included with your product provides detailed information about the sequence of operations for adjusting staging settings including the specific algorithms used for each equipment type and their modes of operation.

 

Honeywell TrueZone ARD Dampers wiring to SmartZone

Supportzoning supplyComment

The latest form Honeywell ARD dampers is a nice looking product and works nicely with ecojay SmartZone.  Wire as shown below.  Other damper wiring at www.zoningsupply.com/blog

SmartZone-4X
sale
SmartZone-4X
$229.99 $299.00
Quantity:
Add To Cart
PRO-Grade Power Zone Damper (Round)
PRO-Grade Power Zone Damper (Round)
from $99.99
Diameter:
Quantity:
Add To Cart

SmartZone has the simplest setup and best features of any zone control. Find out more about SmartZone and why it's the smart choice: www.zoningsupply.com/buy-smartzone/

Damper Wiring: Yet another 5-terminal damper style wired to SmartZone

Supportzoning supply1 Comment

We confirmed today, thanks to a helpful customer, how another DuroZone damper wires using 3 wires (even though it has 5 terminals).

If your damper motors look like the one shown, wire to SmartZone as shown.

Another DuroZone model… on this model it is reported that some versions TERMINAL 4 (the blue wire shown) goes to CLOSE instead of OPEN.

If your motors looks different than this, see our other posts about damper wiring:
4-Terminal and 8-Terminal Damper Wiring

If the motors you have are not compatible with SmartZone, you still don't have to replace the whole damper.  You can replace just the motor (actuator) on just about any standard residential damper with the SmartZone / Belimo motor.

Power Motor Square LG2.jpg
sale
Power Open/Close Motor
from $69.99
w/ LEDs:
Quantity:
Add To Cart

Zoning System Troubleshooting

Supportzoning supplyComment

Because a zone control system interacts with so many different parts (thermostats, transformers, heating/cooling equipment, dampers & temperature sensor), a zoning system can be daunting to troubleshoot when there is a problem.  However, we have realized that there are really just a few common issues are the cause most all of the issues. With a combined 20+ years of zoning questions and technical support calls, we have tried here to boil down to the top 5 reason 99% of zoning systems have a problem.  These do not include a potential problem with the configuration of the Zone Control itself.  The troubleshooting of the zone control configuration is covered well in most Installation Guides.

1. Equipment
   Refrigerant charge, fan speed, wiring, power, etc.
   Always verify that the equipment is working properly first!
2. Thermostats
  a. Incompatible with zone panel
  b. Defective thermostat
  c. Wiring defect
3. Zone Dampers
  a. Actuator failure
  b. Mechanical failure
  c. DUCT Sizing (not enough or too much CFM)
  d. Wiring defect
4. Bypass/Relief
  a. Actuator failure
  b. Sensor (Static Pressure sensor defect)
  c. Mechanical failure
  d. Setup (Modulating calibration or weight arm setting)
  e. Orientation of installation (SPC or barometric bypass)
  f. Improper sizing (not enough CFM capacity)
  g. Wiring defect
5. Power
  a. Transformer fuse
  b. Wiring defect
  c. Primary circuit problem (shared/capacity, breaker)
  d. Improperly sized transformer (not enough VA)

For help troubleshooting your system contact the experts at zoningsupply.com directly via email or phone.

EASIEST TO TROUBLESHOOT ZONE CONTROL ON THE MARKET:

SmartZone-4X
sale
SmartZone-4X
$229.99 $299.00
Quantity:
Add To Cart

What type of damper is best Spring or Power?

Supportzoning supplyComment
smartzone damper sizes.png
smartzone 8 inch spring damper.png

Damper Type Selection

There are two basic types of dampers available in mass today.  Although, there are other damper types such a “balloon” type and pneumatic controlled dampers (used more commonly on DDC systems not included), for this context we will discuss these two main types of dampers:

  • Spring Open or Close (Spring Damper)

  • Power Open & Power Close (Power Damper)

Power Dampers

Power Open /Power Close dampers use three wires to either power open or power close.   They zone panel is responsible for supplying a 24VAC signal to either the PO (Power Open) or PC (Power Closed) terminal of these dampers.  This type of damper was traditionally reserved for “higher-end” or commercial applications because of the cost.  In recent years, however, motor prices have decreased and power dampers have become much more affordable (often no more expensive than the spring equivalent especially when labor and reliability are factored in.)  Primary advantages of Power Dampers include lower power consumption, quiet operation and more reliable parts.  Given the choice, Power Dampers, are almost always preferable.  The only exception to this is when code requires Spring Dampers.

PRO-Grade Power Zone Damper (Round)
PRO-Grade Power Zone Damper (Round)
from $99.99
Diameter:
Quantity:
Add To Cart
 

Spring Dampers

The way Spring Dampers work is they have a motor that, when energized by the zoning panel, it closes the damper.  When the damper is ready to open, the motor stops powering the damper closed and a spring opens the damper blade back up.  Spring Dampers have been used in an “economy” application for many years.  The two primary advantages of a Spring Damper are: 1. If the system loses power they “fail” open… but if the system loses power, the equipment isn’t going to be running either and therefore will not matter in MOST cases.  2. They only require two wires for operation.  One of the negative arguments against Spring Dampers has historically been reliability.  This mostly a result of one of its benefits… the cost.  The inherent lifecycle of any spring actuated mechanism (even if it is in the millions) is less reliable than a system that doesn’t include this potential failure point.   In addition to this, the motor that is used has to be a very specific model that allows for running backwards without damage yet still has to be powerful enough to overcome the spring trying to pull the blade in the opposite direction.  This leads to probably the BIGGEST downfall of using a Spring Damper - the power consumption.  Most Spring Dampers on the market use 3 to 4 times the power of the equivalent Power Damper (10-12 VA vs. 2-3VA).  This could be the difference in using a standard sized transformer and having to go to a very large (and expensive) over-sized transformer.   In summary: spring dampers are NOT recommended unless absolutely necessary for some reason.

Spring HVAC Damper
Spring Zone Damper
from $99.99
DIAMETER:
SPRING DIRECTION:
Quantity:
Add To Cart
 

The parts that make an HVAC Zoning System

Supportzoning supplyComment

Elements of Zoning

A Zoning System consists of 4 primary pieces:

  1. Thermostats

  2. Zoning Control Panel

  3. Dampers

  4. Equipment

1. Thermostats

SmartZone Thermostat Zoning

Thermostats are used in just the same way that a typical thermostat is used except with a zoning system there is ONE thermostat located in each area or “zone.”  Instead of connecting these thermostats to the equipment like a typical application, with zoning all the thermostats are connected to the Zoning Panel.  Suggest purchasing on Amazon.com or from wherever 24VAC thermostats are sold.

2. Zoning Control Panel

SmartZone-4X
sale
SmartZone-4X
$229.99 $299.00
 

The Zoning Panel is the “brains” of the operation.  This computer-like electronic board, reads the calls from all the thermostats and makes decisions about what to energize on the equipment (heat, cool or fan) AND which dampers to open or close.  Zoning Control Panels come in MANY shapes, sizes, and colors but with SmartZone you are just selecting the number of zones)

3. Dampers

PRO-Grade Power Zone Damper (Round)
PRO-Grade Power Zone Damper (Round)
from $99.99
 

Not only are the thermostats connected to the Zoning Panel but so are the dampers.  A damper is to airflow in the duct like a faucet is to water in a pipe.  In other words, the damper acts like a valve in the duct system to divert air to the zones where it is needed.

4. Equipment

Finally, the Equipment is also connected to the Zoning Panel.  The equipment refers to the heating and cooling (HVAC) unit.  This can come in many shapes, sizes, and configurations.  In order to apply zoning to any equipment, the correct zoning Panel mush be chosen.  Some Zone Panels are very specific and can only be used with certain types of equipment while some are much more versatile and can be used on almost ANY type of equipment used.

The above four parts make up the pieces of a Zoning System, but since in a standard system you already have two of these parts (THERMOSTAT and EQUIPMENT).  The addition of a zoning system really consists of adding only two different parts, a ZONING PANEL and DAMPERS.   This makes zoning one of the easiest and affordable ways to gain the much desired improvement of comfort and efficiency.  With these parts installed properly a user can enjoy the ability for both added comfort and increased energy savings.

2, 3, or 4 Zone KITS
2, 3, or 4 Zone KITS
from $599.00
# of Zones:
Damper Sizes:
Bypass:
Quantity:
Add To Cart
 

Replace a Honeywell 4 Zone with SmartZone-4X

Supportzoning supplyComment

UPGRADE your system with an easier & better zoning control.  The SmartZone-4X is a drop in replacement for many zone control systems.  This is a quick diagram showing where to plug in the wires after disconnecting them from your old HONEYWELL system.

Honeywell HZ432, HZ-432, HZ322, HZ-322, HZ311, HZ-311, HZ221, HZ-221 can all be replaced by the SmartZone-4X in most cases.  For more information go to http://www.smartzoning.com