SC-Z20
SPECIFICATION SUGGESTIONS
4.
. EDPM seal installed on inside of round damper
Seals for Round Dampers
shell. Leakage shall be less than 2% at 3 inches of static pressure.
5.
Dampers shall be Specified Controls ZD-XX, ZD-XXXX or approved equal.
6.
VAV Diffusers shall be Specified Controls VD-XX or approved equal.
7.
All zone dampers to have minimum position adjustments.
1.03
ELECTRIC DAMPER ACTUATORS AND ACTUATOR CONTROL BOARDS
A.
. All zone damper actuators shall
Modulating and two position damper actuators
have sufficient reserve power to provide smooth action as specified.
1.
Damper actuators shall be capable of turning clockwise or counterclockwise
and be powered by a reversible motor which is connected to the output shaft.
2.
All actuators shall be factory wired to the damper control board.
3.
All damper actuators shall be mounted outside of the air stream.
B.
The damper actuator control board shall provide wiring terminals for all field and
factory wiring. The damper actuator board will also provide an output for
auxiliary zone heat.
1.
. Damper actuator and duct sensor.
Factory Wiring
2.
. Zone thermostat, wiring to system panel, and
Field Wiring
optional auxiliary heat.
1.04
BYPASS DAMPERS
A.
Bypass damper(s) shall be provided to maintain the proper duct static pressure.
1.
The bypass damper(s) shall be round or rectangular.
2.
Systems under 0.75” w.c. of static pressure shall use a barometric
bypass damper.
3.
Systems 0.75” w.c. and over of static pressure shall use an electronic
bypass damper with static pressure controller.
4.
The bypass damper(s) shall be sized for 90% of the total air flow at
2500 FPM.