Specifications

Page 17
S6162-BS-MMC-010/12489
DRYER INSTALLATION WITH MULTIPLE EXHAUST
For Exhaust Duct more than 14 feet and 2 elbows equivalent and more than 0.3 inches static
pressure.
(See illustration on next page.)
1. Make-up air from outside building may enter enclosure from top or side walls. Area of opening
should be equal to 4 to 6 times the sum of dryer duct areas. Provide 1 square foot (.1m²) for each
6 inches (15.24 cm) diameter; 2 square feet (.2m²) for each 8 inches (20.3 cm) diameter; and 4
square feet (.4m²) for each 12 inches (30.5 cm) diameter.
2. Use constant diameter duct with area equal to the sum of dryer duct areas.
EXAMPLE: 6-8 inches (20 cm) diameter duct = 1-19.6 inches (49.8 cm) diameter duct in area.
Use 20 inches (50 cm) diameter duct or diameter to match tube-axial fan.
3. Enclosure (plenum) with service door. This separates the dryer air from room comfort air. If
dryers use room air instead of outside air, the heat loss can be another 25 BTU/HR (6.3 kcal/hr)
for each cubic foot per minute (CFM) used.
4. Zero inches clearance to combustible material allowed on sides and at points within 4 inches
(100 mm) of front on top.
5. Heat loss into laundry room from dryer fronts only is about 60 BTU/HR per square foot (15 kcal/
hr per 0.1m²).
6. Flange mounted, belt driven tube-axial fan. Fan must run when one or more dryers are
running. See suggested Automatic Electrical Control Wiring Diagram on previous page. Must
meet local electrical codes. Fan air flow (CFM) (M³/min.) is equal to sum of dryer air flows, but
static pressure (SP) is dependent on length of pipe and number of elbows.
7. Barometric Bypass Damper—Adjust to closed flutter position with all dryers and exhaust
fan running. Must be located within enclosure.
CAUTION: Never install hot water heaters or other gas appliances in the same room as
dryers. Never install cooling exhaust fans in the same room as dryers.
CAUTION: Never exhaust dryers with other types of equipment.