ZoningSupply.com - Zone Control

HVAC Zone Controls & Zoning Dampers

spring damper

Replacing old 2-wire spring damper with a high quality ecojay damper

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UPDATE: March 2017 - NEW Dampers available now.  TAKE-OFF ROUND, INSERT ROUND & RECTANGLE Dampers all available now ... scroll down to see all damper models. OR click here.

Some older zone control panels have only two connectors for damper wiring (common & power-close).  These were designed when predominately 2-wire (spring open) dampers were used for zoning.  In recent years, 3-wire (power-open, power-close) dampers have become more common because of their low power consumption and higher reliability.  You might think you have to upgrade your zoning panel to accommodate for these preferable 3-wire dampers... not with Ecojay dampers and belimo actuators.  The wiring diagram below shows how to connect the Ecojay Power Damper to an older zone panel that is only designed to work with 2-wire dampers.

If you are planing to replace the zone controller with SmartZone, this diagram is NOT necessary.

If you have any questions, call or email us.

Featured
PRO-Grade Power Zone Damper (Round)
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PRO-Grade Power Zone Damper (Round)
from $64.99

4", 5", 6", 7", 8", 9", 10", 12", 14", 16", 18" Available

FEATURES:
Industry-leading quality & highest reliability, Belimo Motor, Full-seal gasket blade, Super-Heavy Duty, Ribs for easy flex duct attachment, One crimped end for easy solid duct attachment, 5 Year replacement warranty.

Now available with or without a motor (Select below)

NOTE: All dampers subject to a 10% restocking fee.

TAKE-OFF Zone Damper (Round)
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TAKE-OFF Zone Damper (Round)
from $69.99

Flange & adhesive gasket make install easier than any other damper, Industry-leading quality & highest reliability, Belimo Motor, Full-seal gasket blade, Super-Heavy Duty, Ribs for easy flex duct attachment, One crimped end for easy solid duct attachment,  5 Year replacement warranty

NOTE: All dampers subject to a 10% restocking fee.

PRO-Grade Insert Zone Damper (Retrofit)
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PRO-Grade Insert Zone Damper (Retrofit)
from $49.99

4", 5", 6", 7", 8", 9", 10" ROUND Diameter Dampers

12” & 14” Diameter insert dampers require additional hole to be drilled in duct opposite damper. (grommet included to insert shaft)

FEATURES:
Industry-leading quality & highest reliability, Belimo Motor, Full-seal gasket blade, makes mounting in any round duct easy with these super-heavy duty retro-fit slip-in dampers

NOTE: All dampers subject to a 10% restocking fee.
 

Spring HVAC Damper
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Spring Zone Damper
from $99.99

PRO- GRADE SPRING OPEN or CLOSE DAMPER
SELECT Spring DIRECTION:
- SPRING OPEN, POWER Close Motor or
- SPRING CLOSE, Power Open Motor. 

  • Full-seal gasket blade, BEST spring damper available.  Replace Honeywell ARD & any other 24V spring dampers.

NOTE: All dampers subject to a 10% restocking fee

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Rectangular HVAC Dampers
from $199.99

6" X 6" thru 24" X 24"
SUPER Heavy-Duty
Aluminum rectangular damper w/ Ecojay by Belimo motor
Built to stand up to use and abuse

ATTENTION:

Due to delays receiving raw materials, the shipping time on these custom rectangular dampers has been extended: UP TO 3 or 4 WEEKS

We are very sorry about this delay and will be back to normal shipping times by the end of the year. Please call us if you have any questions or concerns about your order.

SPEC SHEET

SHIPPING TIME: UP TO 3 or 4 Weeks

(because they are custom made to order)
RETURNS for rectangular dampers require 25% restocking fee because they are custom made to order... please be sure you order the correct size.

NOTE: The motor will always be mounted on the “HEIGHT” side

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Barometric Bypass Damper
from $109.99

Round gasket-ed blade, weight-arm style pressure relief (Bypass) damper.

NOTE: All dampers subject to a 10% restocking fee.
 

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Modulating Bypass Damper Kit
from $159.99

Includes:
(1) Power Zone Damper
(1) Static Air Pressure Switch
Combined, these can be used as the most effective and reliable means of air pressure relief (BYPASS) for any zoning system.

NOTE: All dampers subject to a 10% restocking fee.
 

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Air Pressure Switch (Bypass Control)
$69.99

Static Pressure Controlled Bypass Switch
Use with ANY 3-wire (Power Open/Close) Damper - Sold Separatly:
Click here for 3-wire Power Damper

Automatically controls damper for accurate and quiet pressure relief necessary in most zone control applications.

Damper LED Terminal
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Damper LED Terminal
from $12.99

LED screwless wiring terminal for APDM damper motor that includes color LEDs to indicate open and close position.

GREEN = OPEN
RED = CLOSED

Available in 2- Pack and 4- Pack

$12.99 for 2
$19.99 for 4

Multi-Damper Wiring Splitter
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Multi-Damper Wiring Splitter
$9.99

When more than one damper per zone is needed, this adapter can be used to make wiring easy and organized.

What type of damper is best Spring or Power?

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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 $64.99
Motor:
Diameter:
Quantity:
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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
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SPRING DIRECTION:
Quantity:
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