Titus ZECV IOM - Manual

Constant Volume Rooftop Unit
Supply
Air
Bypass
Air Return
Air
Zcom
ZECV
Static
Pressure
Tap
Installation Manual
ZECV-IOM-1.0 3-1-03
Installation, Operation & Maintenance of the ZECV
Analog Pressure Controller
General Description
When applying Zcom diffusers in an changeover/
bypass application with a constant volume rooftop
unit, provisions must be made to control duct static
pressure. The duct static pressure is typically
controlled by a system bypass damper installed off
of the supply duct, and controlled from a static
pressure tap installed 2/3 down the main duct.
Figure 2 illustrates a re commended installation of
the bypass damper to maximize mixing of the
bypass air with the return air. This location of the
bypass minimizes the opportunity for developing
hot or cold spots in the rooftop.
Installation Instructions
These instructions are intended only as a basic
guide for the installer. They do not assure
compliance with local codes. Consult the
authorities having jurisdic tion before installing this
terminal.
Receiving Inspection
After unpacking the pressure controller, check it for
shipping damage. If any shipping damage is found,
report it immediately to the delivering carrier.
Supporting the Terminal
The basic control is light enough so that it can be
supported by the duct work in which it is installed.
Where the accessory modules such as coils,
attenuators or multiple outlets are included, the
assembly should be supported directly. Use the
support method prescribed for rectangular duct in
the job specifications.
Duct Connections
Slip the inlet duct over the inlet collar.
The diameter of the inlet duct in inches must be
equal to the listed size if the terminal: e.g., a duct
that actually measures 8 in ches must be fitted to a
size 8 terminal. Attach the rectangular outlet duct
by using standard SMACNA slip and drive
connection method. Fasten and seal all
connections by the method prescribed by the job
specifications.
Figure 2.
Figure 1. ZECV