Page 75 - Gaylor Blue Book

GENERAL SPECIFICATIONS
Furnish Gaylord Damper Model “GBD”- ”, or “GEBD”- in accordance with the following specifications:
GENERAL: Each balancing damper shall be of dual opposing blade construction fabricated from stainless steel and built to meet the duct sizing requirements of the commercial cooking hood it serves. Each damper blade shall be composed of two interlocking stainless- steel skins. The blades are to be assembled in such a manner as to create low impact surfaces that will reduce or even eliminate the accumulation of grease from normal cooking operations.
OPERATION OPTIONS:
• Model GBD-IS Series - The balancing damper shall have an Internal Set to allow the damper to be adjusted and secured, by tightening a self-locking nut from within the hood plenum. The damper setting and locking mechanism shall not interfere with any duct wrap. This model is intended for use as a duct- collar replacement.
• Model GBD-ES Series - The balancing damper shall have an External Set to allow the damper to be adjusted and secured by tightening a self-locking nut mounted on the outside of the damper housing. Access to the damper adjustment and locking mechanism shall be made through the duct shaft, fire wrap or any other obstructions in accordance with the IMC and NFPA-96.
• Model GEBD Series - The balancing damper shall have an electric motor to control the damper and shall be adjusted by a variable 2 to 10 VDC input from a potentiometer provided with the damper. The potentiometer shall be in a junction box mounted external to the hood, as shown on the plans, and wired to the Balancing Damper by the electrical contractor. Access to the damper motor shall be made through the duct shaft, fire wrap or any other obstructions in accordance with the IMC and NFPA-96.
APPLICATION: The GBD and GEBD Series dampers are to be used downstream of a listed Type I commercial cooking hood. Typically, they are mounted directly to the hood duct collar but can be located downstream of the hood. (refer to Figure 3 for proper installation) They are intended to balance the exhaust flows of two or more hoods on the same exhaust system. The GBD and GEBD Series Dampers have been tested and are listed as an Exhaust System Accessory under UL 710 and ULC S646, and are constructed under the guidelines specified in NFPA-96.
Patent Pending
Figure 1. GBD-ES Series Balancing Damper See figure 3 for proper installation.
DAMPER OPERATION: Each damper is field adjustable to allow your commercial cooking ventilation system to be perfectly optimized. GBD- IS and GBD-ES dampers are manually adjusted and secured in place by use of a self- locking nut. The GEBD electric damper series is adjusted by a variable 2 to 10 VDC input which will allow for easy adjustment and bal- ancing by use of a provided potentiometer or as part of a larger control system designed to reduce air volumes based on equipment and cook- ing requirements. The damper may be wired to the exhaust fan so that it closes upon fan deactivation to preventing cold air from drafting into the kitchen once cooking operations have halted. The electric damper may also be used to reduce or even shut down particular hood sections when cooking lines are at idle or not in operation. The electric damper may be interfaced with a variable air volume system, possibly achieving U.S. Green Building Council LEEDTM credits in the area of Energy Efficiency.
GAYLORD INDUSTRIES
10900 SW AVERY ST • TUALATIN, OR 97062 U.S.A. PHONE: 503-691-2010 • 800-547-9696
FAX: 503-692-6048 • email: info@gaylordventilation.com www.gaylordventilation.com
GBDBalancing Damper MODEL “GBD” SERIES BALANCING DAMPER
FOR COMMERCIAL RESTAURANT EXHAUST HOODS
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