Specifications

RDNO ATHLETIC PARK
AMENITIES BUILDINGS
WE File No.029042.00
May 30, 2014
13 | P a g e
.4 Felt or neoprene anti-chatter blade strips.
.5 Blade connecting linkage with eyelet and pin bearings.
.6 Maximum blade length of 760 mm [30"], use multiples for larger dimensions.
.7 Manufacturer's label.
.8 Where a balanced backdraft damper (BBD) is indicated the damper shall
incorporate an adjustable counterbalance weight and lever.
.9 Maximum pressure drop across damper at 4.06 m/s [800 FPM] shall be 45 Pa
[0.18" w.g.]
.10 Standard of Acceptance: Airolite 625, Penn CBD-6.
26.9 Provide heavy duty opposed blade balance dampers with locking quadrant on each run out
to a grille or diffuser and where indicated on the drawings.
.1 Identify the airflow direction and blade rotation and open and closed position.
.2 Provide sheet metal bridge to raise quadrant type operators above the insulation
thickness. Provide open end bearings where bridges are used.
.3 The damper operating lever shall be arranged parallel with the damper blade.
26.10 Wire Mesh Screens
.1 Provide wire mesh screens in all air intake openings where noted on the drawings.
.2 Screens shall be constructed from aluminum wire 1.3 mm diameter [16 ga].
.3 Screen mesh shall be 12.7 mm [1/2"].
26.11 Provide fire stop flaps where indicated on the drawings. Fire stop flaps shall be single
damper flap with spring catch, U.L.C. tested and labeled. Construct of minimum 1.35 mm
[16 ga] thick sheet steel with 1.6 mm [1/16"] thick [asbestos] on unexposed side and
corrosion-resistant pins and hinges. Arranged so as not to reduce duct free area. Provide
thermal blanket as required. Standard of Acceptance: Ruskin CFSF.
26.12 Provide fire dampers where indicated on the drawings.
.1 Fire dampers shall be U.L.C. or Warnock Hersey tested and labeled. Fire dampers
shall be curtain type, fusible link actuated, weighted to close and lock in closed
position when released or having negator-spring-closing operator for multi-leaf type
in horizontal position with vertical air flow. Curtain fire dampers shall have blades
retained in a recess so free area of connecting ductwork is not reduced. Standard of
Acceptance: Ruskin, Nailor Hart, Controlled Air.
.2 Install in accordance with the SMACNA Fire, Smoke and Radiation Damper
Installation Guide for HVAC Systems - Fourth Edition 1992.
.3 Size so that the free area of the duct is maintained through the assembly.
.4 Install in galvanized steel sleeve, retained in place with retaining angles on all four
sides at each face of wall.
.5 Connect ductwork to damper sleeves using break-away duct joints on all faces.
.6 Fire dampers must be installed within wall thickness of fire separation.
.7 Use ULC approved fire stop sealant to caulk all joints between the fire damper
sleeve angles and the sleeve and between the fire damper sleeve angles and the
fire separation.
26.13 Duct and Plenum Access
.1 Provide access doors and panels as follows:
.1 Doors: where shown on the drawings.
.2 Panels:
.1 Every 12 m [40 ft] on all ductwork.
.2 At the base of each duct riser.
.3 Both sides of equipment blocking the duct, (e.g. air flow measuring
stations, coils)