Instruction Manual for Honeywell models including: 69-1551, 69-1551 Modulating Automatic Round Damper, Modulating Automatic Round Damper, Automatic Round Damper, Round Damper
2 oct. 2018 — The Modulating Automatic Round Damper is a round damper with a 24-Vac, floating-control type modulating motor for bypass and zone damper control.
Honeywell Home 14 in. Galvanized Steel Modulating Damper | Ferguson
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DocumentDocumentModulating Automatic Round Damper (MARD) APPLICATION The Modulating Automatic Round Damper is a round damper with a 24-Vac, floating-control type modulating motor for bypass and zone damper control. It is constructed of 22-gauge galvanized steel and has male (crimped) and female (uncrimped) ends to connect to any rigid or flexible round duct. It is available in 6, 8, 10, 12, 14, 16, and 18-inch diameter sizes. MARD dampers are 2" longer than the diameter. The motor timing is approximately 90 95 seconds from open to closed. The MARD is used for bypass control when connected to the Static Pressure Switch (SPC). Although it can be used on any bypass application, it is recommended for systems larger than 2000 cfm. The MARD can also be used as a zone control damper connected to a zone control panel. INSTALLATION Before Installing this Product... 1. Read all instructions before installing this product. Failure to follow the instructions can damage the product or cause a hazardous condition. 2. Check the ratings given in the instructions and on the product to make sure the product is suitable for your application. 3. Installer must be a trained, experienced service technician. 4. Install the product in an area that is easily accessible for checkout and service. 5. After completing the installation, use these instructions to check out the product operation. Selecting Damper Size 1. To size the bypass damper, subtract the smallest zone cfm from the total system cfm. The remainder is the amount of air that needs to be bypassed. 2. Calculate the bypass damper size using this cfm and a friction loss of .25 in. on a duct calculator or see Table 1. 3. If used as a zone damper, size it the same diameter as the duct. INSTALLATION INSTRUCTIONS Table 1. MARD Size. MARD Diameter 6 Bypass cfma 200 8 400 10 750 12 1200 14 1800 16 2400 18 3200 a Use this table only to size bypass dampers; for zone damper sizing, use a duct calculator. Selecting Damper Location The damper can be installed horizontally or vertically. Orient the damper so the motor is located on the side or top of the damper, not on the bottom of the damper. Mounting the Damper 1. Install a duct collar into the duct or plenum upstream of any zone dampers. Placing it as far as practical from the air handler is preferable. 2. Slide the damper onto the duct collar. 3. Secure with sheet metal screws (not provided). 4. Run the duct from the other end of the damper to the return duct. Ê69-1551-04SS 69-1551-04 MODULATING AUTOMATIC ROUND DAMPER (MARD) WIRING Multiple dampers can be connected in parallel. See Figure 1 - Figure 3. See the SPC literature for additional connection information. CHECKOUT To check out the MARD: 1. With 24 Vac applied to the M1 (common) and M4 (open) terminals, observe that the motor powers the MARD to the open position. 2. With 24 Vac applied to the M1 (common) and M6 (close) terminals, observe that the motor powers the MARD to the closed position. Figure 1. Wiring SPC to control MARD damper in bypass applications Settings/Adjustment See the SPC literature for configuration instructions. Figure 2. Wiring a MARD to a Conventional Zone Panel Figure 3. Wiring two MARDs in tandem to a zone panel. MARD dampers include an LMB24-3-T FLU actuator. Prior to March 2023, the MARD dampers included an ML6161B2024 actuator. Additional information on these dampers can be found at https://customer.resideo.com/resources/techlit/TechLitDocuments/33-00000s/33-00647.pdf www.resideo.com Resideo Technologies, Inc. 1985 Douglas Drive North, Golden Valley, MN 55422 1-800-468-1502 69-1551-04 M.S. Rev. 03-23 | Printed in the United States © 2023 Resideo Technologies, Inc. All rights reserved. The Honeywell Home trademark is used under license from Honeywell International, Inc. This product is manufactured by Resideo Technologies, Inc. and its affiliates.