15831-6
b.
Type: Fixed air intake grille.
1)
Filter: Aluminum mesh, 1/4 inch (6.4 mm), washable.
c.
Type: Filter Only as follows:
1)
Filter: Flat bank 1 inch, disposable.
2)
Filter: Aluminum mesh, 1/4 inch (6.4 mm), washable.
d.
Speed: 2550 cu ft/min (1200 L/s), minimum, per motor/fan assembly.
5.
Sound Pressure Level At 10 feet (3 m) From Nozzle:
a.
Single Motor/Fan Units: 66 dBA.
b.
Two Motor/Fan Units: 68 dBA.
c.
Three Motor/Fan Units: 71 dBA.
d.
Four Motor/Fan Units: 73 dBA.
2.3 COMPONENTS
A.
Electric Heaters: Provide complete with motor control panel factory mounted to air
curtain housing, and thermostat to be field installed.
1. Temperature
limit
controller.
2.
Thermostat: Wall-mounted, 24-Volt operation, with heater on/off selection.
3.
Heating Coils: UL approved. Factory mounted on the discharge end of the
motor fan assembly and located within the nozzle outlet.
B.
Steam Heaters: Provide finned tube steam coils for field mounting on air intake side
of the air curtain cabinet with opposite end connections.
1.
Output: Air curtain manufacturer's standard, one-row coils.
2.
Output: Air curtain manufacturer's standard, two-row coils.
3.
Coils: Certified in accordance with ARI 410.
4.
Connections: Opposite end.
5.
Connections: Same end, right hand.
6.
Connections: Same end, left hand.
7.
Casing: One piece unpainted galvanized steel, bolted to air curtain housing.
8.
Supply and return fittings on ends of casing.
9.
Thermostat: Wall-mounted, 110-Volt operation, with heater on/off selection.
C.
Hot Water Heaters: Provide finned tube water coils for field mounting on air intake
side of the air curtain cabinet with opposite end connections.
1.
Output: Air curtain manufacturer's standard, one-row coils.
2.
Output: Air curtain manufacturer's standard, two-row coils.
3.
Coils: Certified in accordance with ARI 410.
4.
Connections: Opposite end.
5.
Connections: Same end, right hand.
6.
Connections: Same end, left hand.
7.
Casing: One piece unpainted galvanized steel, bolted to air curtain housing.
8.
Supply and return fittings on top of casing.
9.
Thermostat: Wall-mounted, 110-Volt operation, with heater on/off selection.
D.
Motor Control Panels For Unheated Units: Recommended for all three phase units
and single phase units with combined motor capacities of more than 1HP whenever
a door limit switch is used to automatically start and stop the air curtain. Provide
motor control panels as follows:
1.
Mounting: Factory mounted on right hand side of air curtain housing.
2.
Mounting: Factory mounted on left hand side of air curtain housing.
3.
Electrical components UL/CUL listed.
E.
Motor Control Panels For Electric Heated Units: Recommended for all three phase
units and single phase units with combined motor capacities of more than 1HP
whenever a door limit switch is used to automatically start and stop the air curtain.
