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ECONOMIZER AUTOMATIC ROUND DAMPER MODEL "EARD"
The Model "EARD" is a round, single- blade, galvanized steel damper used for fresh air intake for ventilation or for combustion makeup air. The damper is shipped with a 24 Vac powered-open/ spring-closed motor. The blades close off tightly against gasket for minimal leakage. The damper fea- tures quiet operation and can be field converted to power closed/ spring return open damper. Multiple "EARD" can be wired in parallel. The "EARD" is rated to operate up to 1” W.C. and is designed for easy installation with W8835 Envirazone® panels, Vision Pro® thermostats, and Y8150 Fresh air ventilation systems using the W8150 panel.
The new Honeywell TrueZONE® bypass damper reduces installation time by replacing the weight system with a simple dial. Determining the
correct setting can be accomplished by simply turning the crank arm to set the opening and closing of the bypass damper as various zone close down. Designed for easy flexduct connection, and all angle mounting, damper provides constant pressure relief regard- less of blower speed.
Selecting the correct CPRD: (Total system CFM) minus (Smallest zone CFM) = required bypass CFM
CAT. NO. MFG. NO. BYPASS CFM EACH 1C1080C CPRD8 up to 600 $182.37 1C1082C CPRD10 up to 1000 $189.68 1C1084D CPRD12 up to 1400 $194.12 1C1086C CPRD14 up to 1700 $216.00
STATIC PRESSURE REGULATING DAMPERS
The “SPRD” is a single blade steel barometric damper with a counter balanced weighted arm for control of by-pass air for zoned systems. Use as a relief damper to by-pass excess air when various zone dampers close down. The “SPRD” can be adjusted by moving the arm position and the position of the weight on the arm. The “SPRD” is recommended for low pressure systems of less than 0.5” WC.
Selecting the correct SPRD: (Total system CFM) minus (Smallest zone CFM) = required bypass CFM
CAT. NO. MFG. NO. SIZE BYPASS CFM EACH 1C1080 SPRD8 8" up to 400 $169.17 1C1081 SPRD9 9" up to 600 $163.30 1C1082 SPRD10 10" up to 750 $259.94 1C1084 SPRD12 12" up to 1200 $260.85 1C1084B SPRD14 14" up to 1800 $264.39 1C1084C SPRD16 16" up to 2400 $304.16