CopperSmith CSPI-4812 Instrukcja instalacji - Strona 11

Przeglądaj online lub pobierz pdf Instrukcja instalacji dla Urządzenia przemysłowe CopperSmith CSPI-4812. CopperSmith CSPI-4812 13 stron.

a. 290 & 390 CFM Models

DO NOT USE SCREWS TO ATTACH THE DUCT TO THE DAMPER FRAME AS THE SCREWS MAY

BLOCK THE DAMPER BLADE. ALWAYS use aluminum foil metal duct tape on all connections and

physically view the damper blade to make certain it is operating correctly. On ventilator installations

designed to recirculate the exhaust air back into the kitchen, be sure to remove the aluminum damper

blade before attaching the duct to the damper frame.

b. 600 & 1200 CFM Ventilator Models

Damper in Roof Cap or Wall Cap

In ventilation systems utilizing a roof cap or wall cap with a built-in damper, do not install an additional

-line damper. Two dampers are unnecessary and will cause increased static pressure (air resistance),

that may result in rattling, vibration and air buffeting noises, as well as inadequate ventilation.

In-line Damper (for ventilation systems utilizing a roof cap or wall cap without a built-in damper)

In cold weather areas, installing an "in-line" damper may be the preferred type of installation. This is

because in-line dampers installed just above the perimeter of the heated space (the ceiling) will reduce

the amount of cold air traveling down the duct into the heated space and into the kitchen through the

ventilator.

In-line dampers must be installed so that the exhaust air flow will open the butterfly blades.

For horizontal duct runs, the in-line damper must be installed so that the hinge between the two

butterfly blades is vertical

damper's blades will not close and the damper will not prevent backdrafts.

For vertical duct runs, the in-line damper's hinge will be horizontal (sideways), which is correct for

vertical duct runs. Gravity will help close the damper blades after each use.

For upward slanted duct runs, the in-line damper's hinge must point to the top and bottom sides of the

duct. In his position, gravity will help close the damper blades after each use. Otherwise, because of

gravity, the damper's blades will not close and the damper will not prevent backdrafts.

Roof Caps and Wall Caps

The roof cap or wall cap is the termination point of the venting system that allows the exhaust air to exit to the

outdoors. All sections of this fitting must have an equal or greater air path area than the ventilator's discharge

port. If any section of the roof cap or wall cap is smaller than the ventilator's discharge port, the entire

ventilation system will lose efficiency and the restriction will cause increased static pressure.

IMPORTANT: Even though the intake side of the roof cap or wall cap may be properly sized, roof caps or wall

caps with built-in dampers must be made so that when the damper is fully open, the actual open area of the

final air path is equal to or greater than the discharge port of the ventilator. Any undersized portion of a roof

cap or wall cap will cause excessive static pressure that may result in rattling, vibration and air buffeting noises,

as well as inadequate ventilation.

Roof caps and wall caps must have an integral bird screen.

Attaching Duct to House Framework

The ventilation system should be attached to the framework in such a manner that the weight of the duct and

fittings is supported with no stress on the duct joints, fittings or on the ventilator. All ducting should be attached

so as to avoid any possible duct vibration from being transferred to the house's framework.

Revised 05/15/20

—

the hinge pin must point up and down. Otherwise, because of gravity, the