Specifications

%3*45&&.)VNJEJUFDI&MFDUSJD)VNJEJGJFS*OTUBMMBUJPO0QFSBUJPOBOE.BJOUFOBODF.BOVBMt1BHF
%JTQFSTJPO
4%6*BOE4%6&
Mounting SDU-I and SDU-E
Both SDUs can be mounted on a wall directly above the humidifier
cabinet or mounted on a wall remote from the humidifier (see
Figure 20-3). Use the mounting template on the box for correct
placement. Two lag bolts are provided with each SDU.
t *OTUBMMBUJPONVTUDPNQMZXJUIHPWFSOJOHDPEFT
t 4FFJOUFSDPOOFDUJOHQJQJOHSFRVJSFNFOUTJO5BCMFBOEUIF
drip tee installation instructions on Page 18.
t 1SPWJEFBUMFBTUNNDMFBSBODFPOFBDITJEFPGUIF4%6
t 'JFMEXJSJOHJTSFRVJSFEUPDPOOFDUUIF4%6GBOBOEBJSGMPX
proving switch terminals to Humidi-tech electrical panel
terminals. Refer to the external connections diagram in the
package shipped with your unit. See Figure 19-1. Minimum wire
size for field wiring is 1.5 mm
2
stranded wire.
t 'PSXBMMNPVOUJOHVTFUIFNPVOUJOHUFNQMBUFPOUIFCPY
for correct placement. Two M10 × 50 mm coach screws are
provided with each fan unit.
t 8IFONPVOUJOHPOBTUVEXBMMTUVET<NN>PODFOUFS
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 6 mm diameter pilot holes for
an M10 × 50 mm coach screw.
t 'PSIPMMPXCMPDLPSQPVSFEDPODSFUFXBMMNPVOUJOHQPTJUJPO
template in place and mark the holes. Drill appropriate pilot
hole for two M10 toggle bolts or two M10 machine bolt lead
anchors (expansion bolts). Secure SDU frame in place.
When performing Humidi-tech maintenance
If the SDU-E or SDU-I is installed immediately above the
Humidi-tech, 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.
Figure 19-1:
SDU field wiring
SDU-E
Field wiring for fan and
airflow proving switch
VLC-OM-031
Humidi-tech 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.
SDU-I is available for Models HT-2 through HT-10.
SDU-E is available for all models, except Model HT-2 and HT-16
through HT-34.
Note: SDUs ship separate from the Humidi-tech.