15
STS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
DC-1478
B
Standard steam outlet (exits enclosure here)
Intake ven ti la tion fan
D
C
Pipe chase extending 1" (25 mm) above enclosure fl oor
STS hu mid i fi er
Elec tri cal and cleanout access
door
Control panel heater
Control panel
Enclosure drain
E
Optional steam outlet
(exits enclosure through pipe chase)
Valve access door:
• Models 25-100 have one access door
• Models 200-800 have two access doors
Intake ventilation fan
Valve section heater
Valve access door
J
H
Outdoor Enclosure
INSTALLATION
F
MOUNTING
• Outdoor Enclosure must be level and positioned with enough clearance to
open access doors.
• Verify that position of pad or curb properly supports Outdoor Enclosure,
and that support structure dimensions coincide with unit dimensions.
• Locate unit so air intakes are not close to exhaust fan outlets, gasoline
storage, or other contaminants that could potentially cause dangerous
situations. Using or storing gasoline or other fl ammable vapors and liquids
in open containers in vicinity of Outdoor Enclosure is hazardous.
• When located on roof, Outdoor Enclosure air intakes must be a minimum
of 14" (356 mm) above roof to prevent intake of snow or splashed rain.
Position Outdoor Enclosure so prevailing winds do not blow into air intakes.
• Remove all shipping brackets and other packaging prior to installing the
unit.
• During transit, unloading, and setting of the unit, bolts and nuts may have
become loosened. Check that all nuts are tightened.
Important note about STS Outdoor
Enclosure installation
• Install a riser trap in the branch line leading
to the humidifi er.
• The preferred location for the STS steam
control valve is inside the Outdoor Enclosure.
If one of these valves must be located inside
the building, it must be located within 6'
(1.8 m) of the humidifi er to reduce pressure
drop.
FIGURE 15-1: STS OUTDOOR ENCLOSURE, TOP VIEW