54
VAPORSTREAM INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
SDU-I and SDU-E
CHOOSING A LOCATION FOR SDU-I AND SDU-E
•
When used with a Vaporstream, the SDU can be located a minimum of 18"
(457 mm) above a Vaporstream humidifi er, or remotely from the humidifi er
(see interconnecting piping requirements in Table 38-1 for maximum
distance).
• Allow 6" (152 mm) clearance on each side of SDU.
MOUNTING SDU-I AND SDU-E
SDU-I and SDU-E units can be mounted on a wall remotely from the
Vaporstream humidifi er.
• Installation must comply with governing codes.
• See interconnecting piping requirements in Table 38-1, and the drip tee
installation instructions on Page 41.
• Provide at least 6" (150 mm) clearance on each side of the SDU.
• Field wiring is required to connect the SDU fan and airfl ow proving switch
terminals to the hu mid i fi er electrical panel terminals. Refer to the external
connections diagram in the package shipped with the unit.
• For wall mounting, use the mount ing tem plate on the box for correct
place ment. Two 3/8" lag bolts (M10 × 50 mm coach screws) are provided
with each fan unit.
• When mounting on a stud wall (studs 16" [406 mm] on center), locate studs
and position lag bolts (coach screws) in place so that each of the two lag
bolts (coach screws) centers on a stud. Mark hole locations and predrill ¼"
(6 mm) diameter pilot holes for a 3/8" × 2" lag bolt (M10 × 50 mm coach
screw).
• For hollow block or poured concrete wall mounting, position template in
place and mark the holes. Drill ap pro pri ate pilot hole for two 3/8" (M10)
toggle bolts or two 3/8" (M10) machine bolt lead anchors (expansion
bolts). Secure SDU frame in place.
• To provide power to the SDU, run a neutral line with 208V/240V/single-
phase and 208V/three-phase power supply lines to provide a 120V circuit
for the fan. With all other power supply voltages (other than 120V), provide
a separate 120V circuit for the fan, or order from DriSteem a trans form er
in stalled in the control cabinet.
• The fan and airfl ow proving switch ter mi nals are labeled in the hu mid i fi er
and in the SDU. Min i mum wire size for fi eld wiring is 18-gauge (1.5 mm2)
stranded wire.
SDU-I: Instant, internal absorption
SDU-I (Space Distribution Unit Internal
Absorption) disperses humidity with no visible
vapor trail or wetness, making it ideal for use
in fi nished spaces. The SDU-I fan mixes room
air and steam to ensure complete absorption
before discharge as humidifi ed air.
Important:
For visible vapor to be
absorbed completely within the SDU-I unit
before being discharged as hu mid i fi ed air,
room air must be 45% RH or less. Trying to
maintain greater than 45% RH will cause
visible vapor and potential for moisture
collection on the discharge grille.
SDU-E: Higher capacity
SDU-E (Space Distribution Unit External
Absorption) is designed for higher capacity
dispersion. SDU-E requires an installed
condensate drain line and water seal, provided
by installer.
mc_052510_1610
INSTALLATION
Dispersion:
