Specifications

22
VAPORMIST INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Dispersion:
MOUNTING SDU-I AND SDU-E
Both SDUs can be mounted on a wall directly above the Vapormist cabinet
or mounted on a wall remote from the Vapormist (see Figure 6-3). Use the
mounting template on the box for correct placement. Two lag bolts are
provided with each SDU.
• Installation must comply with governing codes.
• See interconnecting piping requirements in Table 19-1, and the drip tee
installation instructions on Page 21.
• Provide at least 6" (150 mm) clearance on each side of the SDU.
• Field wiring is required to connect the SDU fan and airflow proving switch
terminals to Vapormist electrical panel terminals. Refer to the external
connections diagram in the package shipped with your unit. See Figure
22-1. Minimum wire size for field wiring is 18-gauge (1.5 mm2) stranded
wire.
• For wall mounting, use the mounting template on the box for correct
placement. 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 appropriate 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.
WHEN PERFORMING VAPORMIST MAINTENANCE
If the SDU-E or SDU-I is installed immediately above the Vapormist, disconnect
both hose clamps on the steam hose, grip the hose and rotate it to break it
loose from the tubing, and then slide the hose up onto the SDU steam tube until
sufficient clearance is provided to move the tank.
mc_062810_1005-VM
SDU-E
Field wiring for fan
and airflow proving
switch
VLC-OM-031
Vapormist electrical
panel, right side
view
INSTALLATION
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 finished spaces. The SDU-I fan mixes room
air and steam to ensure complete absorption
before discharge as humidified air.
Important: For visible vapor to be
absorbed completely within the SDU-I unit
before being discharged as humidified 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
SDU-I is available for Vapormist humidifier models VM-2 through VM-10.
SDU-E is available for all Vapormist humidifiers except VM-2 and models using
240V, 277V, and 480V three-phase power with the SSR control option and
drawing more than 32.7 amps.
Note: SDUs ship separate from the Vapormist.
mc_052510_1525-VM
SDU-I and SDU-E
FIGURE 22-1: SDU FIELD WIRING