Sample Specifications - Johnson Controls - LIT-1900820 - LIT-1900820

VD-1240 Thin Line Control and VD-1241 Low Leakage Insulating Control Dampers Catalog Page

Brand
Johnson Controls
Product name
LIT-1900820
Document type
Catalog Page
Document number
LIT-1900820
Revision date
2021-03-10
Language
English

Furnish and install at locations shown on plans or in accordance with schedules, low leakage dampers that meet the following minimum construction standards:

Table 1. Sample Specifications
Specification Description
VD-1240 Damper Frame 4 in. (102 mm) x 1 in. (25 mm) x 6063T5 extruded aluminum channel with .081 in. (2.1 mm) minimum wall thickness. Optional mounting flanges on both sides of frame.
VD-1241 Damper Frame 8-1/8 in. (206 mm) x 1 in. (25 mm) x 6063T5 extruded aluminum channel with .081 in. (2.1 mm) minimum wall thickness. Optional mounting flanges on both sides of frame. Thermal gasket between frame sections.
Damper Corner Reinforced with two die formed internal braces and machine staked for maximum rigidity
Damper Blades 4 in. (102 mm) wide, airfoil type extruded aluminum, with integral structural reinforcing tube running full length of each blade
Axles 1/2 in. (13 mm) plated steel hex
Bearings Non-corrosive molded synthetic. Hexagonal axles to provide positive locking connection to blades and linkage (round axles are not acceptable).
Linkage Concealed in end channel of frame
Blade Seals Extruded double edge design with inflatable pocket, allowing air pressure from either direction to assist in blade-to-blade seal off. Blade seals mechanically locked in extruded blade slots, and easily replaceable in field. Adhesive or clip-on type blade seals are not acceptable.
Control Shaft 6 x 1/2 in. (152 x 13 mm) diameter. Outboard support bearing supplied with all single section dampers for field-mounted actuators. Factory-installed jackshaft supplied with all multiple section dampers.
Finish Mill