VAPORSTREAM VLC User manual

READ AND SAVE THESE INSTRUCTIONS
VAPORSTREAM
Models VLC and VLDI
ELECTRIC STEAM HUMIDIFIERS
Installation Instructions
and
Maintenance Operations
Manual
®
For Toll-Free Technical Support,
Call1-800-328-4447
CUL LISTEDUL LISTED

2
TO THE PURCHASER AND THE INSTALLER
Thank you for purchasing VAPORSTREAM®Model VLC equipment. We have designed and built this equipment to give
you total satisfaction and many years of trouble-free service. Proper installation and operating practices will assure you
of achieving that objective. We therefore urge you to become familiar with the contents of this manual.
This manual covers material for both VAPORSTREAM Model VLC and VAPORSTREAM Model VLDI humidifiers. Most
of the application material will apply to both units. When information differs for the two units, it will be noted as such.
DRI-STEEMHumidifierCompany
VAPORSTREAM Models VLC and VLDI ..............................3
MechanicalSpecificationsandCapacities ..........................4
MechanicalSpecifications....................................................5
VAPORSTREAMModelVLCAREA-TYPEHumidifier .........6
MountingMethods
MountingProcedures ..................................................7
Electrical ....................................................................8
DispersionTubeInstallation ................................................9
OptionalWeatherCover........................................................11
WeatherCoverDimensions.........................................12
RAPID-SORB®AssemblyandInstallation
Horizontal Duct Installation ......................................13
Vertical Duct Installation ......................................... 14
PipingMethods
DrainPiping ................................................................15
Make-upWaterPiping.................................................15
Piping Diagrams: Steam, Water and Drain ..........................16
Start-upProcedure................................................................17
Operation...............................................................................17
RecommendedMaintenance ................................................18
Trouble-ShootingGuide.......................................................18
ReplacementParts ................................................................19
MaintenanceServiceRecord................................................21
Two-YearLimitedWarranty ..................................................23
TABLE OF CONTENTS

3
VAPORSTREAM®MODELS VLC AND VLDI
VAPORSTREAM VLC
Electric Humidifier
State-of-the-art technology in a
simple, low-maintenance humidifier.
This humidifier is designed to be
used with either softened or
unsoftened water (preferably soft-
ened). The probe-type level control
system requires water conductivity
of 100 micromhos/cm (2 grains/gal)
minimum to function, and therefore
will not operate on water treated by
reverse osmosis or deionization.
However, VAPORSTREAM®Model
VLC humidifiers are available for use
with these water types. The stan-
dard humidifier can be converted in
the field to a VLDI model. See
below.
VAPORSTREAM VLDI
Option
For use with deionized or reverse
osmosis water. This unit produces
chemical-free steam and reliable,
accurate humidification control. It is
virtually maintenance-free with no
wasted water, no wasted heat, and
very little or no downtime.
OM-628
Control Cabinet
Probes
VAPOR-LOGIC®
Raised Heater
Dispersion Tube
Duct
Cover
Cover Knobs
EvaporatingChamber
Skimmer Port Outlet
Fill Valve
Needle Valve
Manual or Electric
Drain Valve
Clean-out Tray
Thermal Cut-Out
OM-1000
Cover Knobs
Cover
Overflow
Float Valve
Low-Water Cut-Off
3/4" SST Drain Valve

4
MECHANICAL SPECIFICATIONS AND CAPACITIES
Capacity Notes
Approximately 172 BTUs (400 kJ) are required to raise the
temperature of one pound (Kg) of water from 40° to 212° F (4°
to 100°C). An additional 970 BTUs (2250 kJ) are required to
change one pound (Kg) of water to water vapor.
The addition of ¾" (25 mm) rigid foil faced fiberglass insula-
tion (optional) on all surfaces of evaporating chamber will
increase unit efficiency by approximately 2%.
Another factor to consider is condensation steam loss from
hoses and tubes. Use the following steam loss guidelines:
• vapor hose: 0.15 lbs/ft/hr (223 g/m/h)
• insulated pipe: 0.05 lbs/ft/hr (74 g/m/h)
• dispersion tubes: 0.5 lbs/ft/hr (744 g/m/h)
Table4-1: MechanicalSpecificationsandCapacities
* Heater stage identifies the number of contactors.
** Three-phase power supply connection. All heater loads are wired delta.
ledoM rebmun
maetS seiticapac ruohrep sretaeH )A()spma(wardtnerruC
Wk
.sbL.gK esahp-elgniS**esahp-eerhT
.ytQ*segatSV021V802V042V084V006V802V042V084V006
1-2IDLV/CLV7.56.21 1 7.616.93.82.43.32
1-36.80.41 1 0.524.415.213.60.53
1-44.112.51 1 3.332.917.613.87.64
1-52.519.61 1 6.522.221.119.833.5
1-6IDLV/CLV1.718.73 1 8.820.525.210.017.614.412.78.56
1-97.527.113 1 3.345.738.810.510.527.128.017.89
1-212.435.513 1 0.520.023.339.824.415.1121
1-616.547.023 1 3.337.624.445.832.914.5161
1-129.952.723 1 8.340.533.522.0212
1-523.173.233 1 7.141.031.4252
2-21IDLV/CLV2.435.516 2 7.750.050.520.023.339.824.415.1121
2-813.153.326 2 5.680.575.730.030.053.347.123.7181
2-424.860.136 2 0.050.046.667.759.821.3242
2-232.194.146 2 7.663.358.880.775.838.0323
2-247.9113.456 2 5.780.075.054.0424
2-055.2416.466 2 3.381.061.8405
3-81IDLV/CLV3.153.329 3 5.680.575.730.030.053.347.123.7181
3-720.770.539 3 8.9215.2113.650.549.470.565.230.6272
3-636.2015.649 3 0.570.069.996.683.346.4363
3-848.6311.269 3 0.0010.082.3315.5117.752.6484
3-366.9715.189 3 3.1310.5018.576.0636
3-578.3120.799 3 0.5212.092.2757
4-42IDLV/CLV4.860.13214 4.5110.0010.050.046.667.759.821.3242
4-636.2015.64214 1.3710.0510.570.069.996.683.346.4363
4-848.6311.26214 0.0010.082.3315.5117.752.6484
4-464.2817.28214 3.3317.6016.7710.4510.776.1646
4-484.9327.801214 0.5710.0410.1018.0848
4-0010.5823.921214 7.6613.0212.69001

5
MECHANICAL SPECIFICATIONS
Table 5-1: Mechanical Specifications
Table5-2: ControlCabinetDimensions
* In addition to the shipping weight of the humidifier.
Figure5-1: Dimensions
B
BackView
A
OM-626
Front View
SideView
C
* Refer to table 5-2 for Control Cabinet dimensions
Model
Number A (width) B (height) C (length) Weight
empty
(lbs)
Weight
empty
(kg)
Weight
full
(lbs)
Weight
full
(kg)
Control
cabinet
sizes
in. mm in. mm in. mm
VLC/VLDI 2-1 20.25 515 16.85 430 7.52 190 35 16 79 36 M
3-1 20.25 515 16.85 430 7.52 190 35 16 79 36 M
4-1 20.25 515 16.85 430 7.52 190 35 16 79 36 M
5-1 20.25 515 16.85 430 7.52 190 35 16 79 36 M
VLC/VLDI 6-1 22.00 560 18.38 465 12.85 325 57 26 157 71 M
9-1 22.00 560 18.38 465 12.85 325 57 26 157 71 M
12-1 22.00 560 18.38 465 12.85 325 57 26 157 71 M
16-1 22.00 560 18.38 465 12.85 325 57 26 157 71 M
21-1 22.00 560 18.38 465 12.85 325 57 26 157 71 M
25-1 22.00 560 18.38 465 12.85 325 57 26 157 71 M
VLC/VLDI 12-2 22.00 560 18.38 465 20.35 515 79 36 237 108 M
18-2 22.00 560 18.38 465 20.35 515 79 36 237 108 M
24-2 22.00 560 18.38 465 20.35 515 79 36 237 108 M
32-2 22.00 560 18.38 465 20.35 515 79 36 237 108 M
42-2 22.00 560 18.38 465 20.35 515 79 36 237 108 M
50-2 22.00 560 18.38 465 20.35 515 79 36 237 108 M
VLC/VLDI 18-3 22.00 560 18.38 465 27.85 705 110 50 326 148 L
27-3 22.00 560 18.38 465 27.85 705 110 50 326 148 L
36-3 22.00 560 18.38 465 27.85 705 110 50 326 148 L
48-3 22.00 560 18.38 465 27.85 705 110 50 326 148 L
63-3 22.00 560 18.38 465 27.85 705 110 50 326 148 L
75-3 22.00 560 18.38 465 27.85 705 110 50 326 148 L
VLC/VLDI 24-4 22.00 560 18.38 465 35.35 900 153 70 427 194 XL
36-4 22.00 560 18.38 465 35.35 900 153 70 427 194 XL
48-4 22.00 560 18.38 465 35.35 900 153 70 427 194 XL
64-4 22.00 560 18.38 465 35.35 900 153 70 427 194 XL
84-4 22.00 560 18.38 465 35.35 900 153 70 427 194 XL
100-4 22.00 560 18.38 465 35.35 900 153 70 427 194 XL
Size Inches mm Shipping weight*
M 14 w x 16h x 6d 355 w x 400 h x 150d 32 lbs. 15 kg
L 20w x 20h x 7d 500 w x 500 h x 180d 55 lbs. 25 kg
XL 24w x 24h x 7d 600w x 600h x 1180d 73 lbs. 33 kg

6
VAPORSTREAM®MODEL VLC AREA-TYPE HUMIDIFIER
AREA-TYPE Humidifier Application
Information
The operating characteristics of AREA-TYPE steam
humidifiersshouldbeconsideredwhenselectinghumidi-
fier capacities and choosing mounting locations.
Steam discharge from the humidifier quickly cools and
turns to visible, warm, microscopic drops or particles of
water(fog)whichare lighter thanair.
Should this fog contact any solid surface (columns,
beams, ceiling, pipes, etc.) before it disappears, it may
collect and drip, as water.
The greater the space relative humidity, the higher and
farther the "fog" will carry and rise in the space before
disappearing.
The table at right states the vertical (rise), horizontal
(throw),andwidth(spread)dimensionsthatcanbe
expected with the AREA-TYPE humidifiers.
Toavoidsteamimpingementonsurroundingareas,these
dimensionsshouldbeobserved.
Note: Tank dimension "C," in figure 5-1 on page 5, must
be at least 12.85" (325 mm) and output should not exceed
285lbs/hr(130Kg/h).
Table: 6-1: Minimum Distance for Rise, Spread and Throw
OM-681
Heaters

Steam
Chute 

Fan
Figure 6-1: Principle of Operation
Steamcreated inthe evaporating chamber (1) flowsup
through the chute (2), and is distributed into the space (3)
via the fan.
Space
temp. Space RH 50 lbs/hr 20 kg/hr 100 lbs/hr 45 kg/hr 150 lbs/hr 65 kg/hr 200 lbs/hr 90 kg/hr 250 lbs/hr 110 kg/hr 285 lbs/hr 130 kg/hr
60°F
16°C
30%
Rise 1 ft. 0.5 m 4 ft. 1.5 m 6 ft. 2.0 m 7 ft. 2.5 m 8 ft. 2.5 m 9 ft. 3.0 m
Spread 2 ft. 1.0 m 4 ft. 1.5 m 5 ft. 2.0 m 7 ft. 2.5 m 8 ft. 2.5 m 9 ft. 3.0 m
Throw 6 ft. 2.0 m 10 ft. 3.0 m 12 ft. 4.0 m 13 ft. 4.0 m 15 ft. 5.0 m 17 ft. 5.5 m
40%
Rise 1 ft. 0.5 m 4 ft. 1.5 m 6 ft. 2.0 m 8 ft. 2.5 m 9 ft. 3.0 m 10 ft. 3.0 m
Spread 2 ft. 1.0 m 4 ft. 1.5 m 5 ft. 2.0 m 7 ft. 2.5 m 9 ft. 3.0 m 10 ft. 3.0 m
Throw 6 ft. 2.0 m 10 ft. 3.0 m 12 ft. 4.0 m 14 ft. 4.5 m 16 ft. 5.0 m 18 ft. 5.5 m
50%
Rise 1 ft. 0.5 m 4 ft. 1.5 m 6 ft. 2.0 m 8 ft. 2.5 m 9 ft. 3.0 m 10 ft. 3.0 m
Spread 2.5 ft. 1.0 m 5 ft. 2.0 m 5 ft. 2.0 m 7 ft. 2.5 m 9 ft. 3.0 m 10 ft. 3.0 m
Throw 6 ft. 2.0 m 10 ft. 3.0 m 12 ft. 4.0 m 14 ft. 4.5 m 16 ft. 5.0 m 18 ft. 5.5 m
70°F
21°C
30%
Rise 1 ft. 0.5 m 3 ft. 1.0 m 4 ft. 1.5 m 5 ft. 2.0 m 5 ft. 2.0 m 7 ft. 2.5 m
Spread 1.5 ft. 0.5 m 3 ft. 1.0 m 4 ft. 1.5 m 5 ft. 2.0 m 5 ft. 2.0 m 7 ft. 2.5 m
Throw 4 ft. 1.5 m 8 ft. 2.5 m 10 ft. 3.0 m 11 ft. 3.5 m 12 ft. 4.0 m 14 ft. 4.5 m
40%
Rise 1 ft. 0.5 m 3 ft. 1.0 m 4 ft. 1.5 m 5 ft. 2.0 m 6 ft. 2.0 m 7 ft. 2.5 m
Spread 2 ft. 1.0 m 3 ft. 1.0 m 4 ft. 1.5 m 5 ft. 2.0 m 6 ft. 2.0 m 7 ft. 2.5 m
Throw 4 ft. 1.5 m 8 ft. 2.5 m 11 ft. 3.5 m 12 ft. 4.0 m 13 ft. 4.0 m 15 ft. 5.0 m
50%
Rise 1 ft. 0.5 m 3 ft. 1.0 m 4 ft. 1.5 m 5 ft. 2.0 m 5 ft. 2.0 m 7 ft. 2.5 m
Spread 2 ft. 1.0 m 3 ft. 1.0 m 4 ft. 1.5 m 5 ft. 2.0 m 5 ft. 2.0 m 7 ft. 2.5 m
Throw 4 ft. 1.5 m 8 ft. 2.5 m 11 ft. 3.5 m 12 ft. 4.0 m 14 ft. 4.5 m 16 ft. 5.0 m

7
Figure 7-1: VLC Mounting Methods
1. Floor Stand Method 2. Trapeze Hanger Method 3. Wall Brackets Method
4. Mounting Unit Below Duct
Mounting humidifier 18" (460 mm) below duct is
recommendedto facilitatecover removal.
Mounting Procedures
Forproperoperationoftheelectrodeprobewaterlevel
control and the skimmer system, the humidifier must be
mounted level in both directions.
Access,18" minimum (460 mm), for periodic removal of
the top cover is recommended. The cover is removed for
inspectionand cleaningof theevaporating chamber.In
most cases, scale that forms on the heating elements
continuously flakes off as it forms and the loose scale
MOUNTING METHODS
OM-648
24 ¾"
(630 mm)
Two-piece Escutcheon Plate
fastens to bottom of duct
(duct omitted for clarity)
Cover of VAPORSTREAM®
Humidifier
OM-65
settles to the bottom. A clean-out tray on the floor of the
tankmay beremoved periodicallythrough the front clean-out
opening. Allow space for withdrawal of the tray when install-
ingthehumidifier.
In some installations, an overflow drain pan may be neces-
sary to prevent possible damage to flooring. This may be
caused by a rapid or sudden drainage of the contents of the
humidifier. The drain pan must be connected to the sanitary
waste water system.
DRI-STEEM
wall brackets
(optional)
2required
A
Secure rods to
overheadconstruction
Angleor channel
of size required
OM-647
Threaded rod of
sizerequired
Cleanout
Steam Dispersion
Tube
Provide 18" (460 mm)
min. clearance under
duct for cover removal
DRI-STEEM
support legs
(optional)
OM-646
Clamp
VaporHose
Bottom of Duct
2 piece Escutcheon Plate
Cover of VAPORSTREAM
Humidifier
18" min.
(460 mm)
Cut hole in duct large
enough to allow
passage of hose clamp
OM-66
Steam Dispersion
Tube
tinU snoisnemiD Arof )sehcnini(
snoisnemiD Arof )mmni(
retaeh391084
retaeh691084
retaeh903067
retaeh2163519

8
5.MountingUnits Away from Duct(s) Using VaporHose
MOUNTING METHODS
Electrical
The current characteristics, and capacity requirements
should be checked against the nameplates. The control
cabinet should be mounted in a location convenient for
service. All wiring must be in accordance with all local
codes, and with VAPORSTREAM®Model VLC wiring
diagram. The diagram is inside the control cabinet. The
wiring between the control cabinet and humidifier must
be rated at 105°C minimum.
Airflow
Air Handling Unit Casing
Humidifier Centered
in Air Handling Unit
OM-653
6. Mounting In Air Handling Unit Gasketed Access Door
Supply Air Duct
Set unit level. Locate unit so that steam
dispersion assembly is in the most active part
of the air stream.
Air Handling Unit Coil Section
Filter and Mixing Box
Outdoor and Return
Airflow into Air
Handling Unit
Caution: Only qualified electrical
personnel should perform installation
procedures.
Vapor hose. (Pitch back min. 2" per foot (165 mm/m) to
humidifier with supports to prevent sagging.) Maximum length
10' (3 m). Humidifier must be mounted level.
OM-638
Stainless steel dispersion tube in
middle of duct. Pitch as shown in
figure 9-1 on page 9.

9
Dispersion Tube Installation with Condensate Drain
VaporHose
When a vapor hose and stainless steel dispersion tube
are used, they should be pitched back to the humidifier.
A minimum slope of 2" per foot (165 mm/m) (with no “low
spots”) is recommended. Vapor hose should be sup-
ported to prevent sags or low spots. When this is not
possible due to duct elevation or an obstruction, alternate
arrangementsshouldbeusedas shown infigure15-1
or15-2.
Any condensate that forms in the vapor hose must be
removed. Preferably, it should be returned to an open
drain with a water seal of sufficient height to contain the
duct static pressure, as shown in figure 10-1.
The condensate can also be returned to the
VAPORSTREAM®VLC, as shown in figure 10-2, with an
air vent. This method requires a water seal and an air gap
to prevent back pressure from the VLC chamber. Exces-
sive back pressures imposed on the humidifier may lead
to dispersion tube(s) spitting, lost water seals, or leaking
gaskets. When the distance between the humidifier and
the dispersion tube(s) exceeds 10 feet (3 m), consult
factoryfor specialrecommendations.
HardPiping (when used)
•Hard piping should have a minimum I.D. of 1½" (35 mm).
•A minimum pitch of 2" per foot (165 mm/m) back to the
humidifiermustbemaintained.
•90°elbowsarenotrecommended;use two 45°elbows
onefoot apart instead.
•Thin-walled tubing will heat up faster and cause less
start up loss than heavy-walled pipe.
•Insulating the rigid piping will reduce output loss due to
condensation.
TubeMounting
•Mount dispersion tubes pitched as stated above.
•Tubeletsmust discharge perpendicularto airflow.
•Returnline piping material must be suitable for212°F
(100°C)water.
Min. Condensate Drain Line Sizing
•One or two tubes: 3/4" (20 mm) I.D.
•Three or more tubes: 1" (25 mm) I.D.
Figure 9-1: Single Tube
½" O.D. Stainless Steel
(condensate drain)
Movable Duct Plate (Can be mounted within limits of 2.5" (65 mm).)
¼" NPT Coupling
.625 Dia.
"B" Dia. (TYP)
A
A
A2.5"
(65
mm) 2"/ft (165 mm/m) Pitch Mounting Nut
Pre-moldedHigh
Temperature Resin Steam Tubelets
Insertion Length
OM-351
Table9-1:DispersionTubeCapacities
A
3.25"
(85 mm)
1/8"/ft (10 mm/m) Pitch
DISPERSION TUBE INSTALLATION
Mounting Nut
yticapaC
ebuT .aiD tuohtiW niarD htiW niarD AB
"½1)mm83( rh/sbl82 )h/gK31( rh/sbl75 )h/gK62( "52.3 )mm58( "15.1 )mm04(
"2 )mm05( rh/sbl75 )h/gK62( rh/sbl58 )h/gK93( "00.5 )mm031( "30.2 )mm05(
3.25"
(85 mm)

10
OM-697
Table 10-1: Water Seal Minimum Height*
* Height required to overcome humidifier internal pressure.
Figure 10-1: Multiple Tube
withCondensateWasted
to Floor Drain
Dispersion
Tube
Duct
Dispersion Tube
VAPORSTREAM®
VLC or VLDI
Humidifier
1-½" (38 mm) Dia. Vapor
Hose or Hard Tubing*
Water Seal
(5" (125 mm) approx.)
6" (150 mm) Min.
Floor Drain*
Condensate Drain
Tube by Others** (3/4" (20 mm) minimum)
*Refer to local
codes for drain pipe
sizing requirements.
OM-696
½" (50 mm) O.D. Condensate
Drain Tube
Figure 10-2: Multiple
TubewithCondensate
ReturntoHumidifier
Dispersion Tube
Dispersion Tube Duct
Water Seal
(5" (125 mm)
approx.)
½" (13 mm)
Air Vent
6" (150 mm) Min.
1-½" (38 mm)
Dia. Vapor
Hose or Hard
Tubing *
Condensate Drain
Tube by Others, 3/4"
(20 mm) Minimum
Refer to Water Seal Height,
Table 10-1
VAPORSTREAMVLC
or VLDI Humidifier
¾" (20 mm)
Condensate
Return Connection
(on face plate)
½" (50 mm) O.D. Condensate
Drain Tube
Air Gap
DISPERSION TUBE INSTALLATION
reifidimuHrH/sbLh/gK thgieH )sehcnI( thgieH )mm(
WK84otpU831-526-221503
otWK94 WK46 381-93138-3651083
otWK56 WK001 722-481301-4881064

11
OPTIONAL WEATHER COVER
A weatherproof enclosure is available, as an option, for
the VAPORSTREAM®VLC. This weather cover is avail-
able in either galvanized or stainless steel and comes in
four sizes, designed to fit over a 3, 6, 9, or 12 heater VLC
(see figure 12-2 for dimensional data on the four sizes).
The weather cover encloses the VLC to protect it from
wind and water, and is ETL listed to conform to UL
standard 988. The weather cover is fully assembled at the
DRI-STEEM factory and is available with a remotely
mountedcontroller.
InstructionsforInstallation(See Page 12, Figures 12-1
and12-2):
1. Remove the weather cover top and panels C and D to
access the water and electrical connections. A 7/16"
socketwrench isrequired.
2. Connectwatersupplyanddrainpiping(panelC).
3. Terminatemainpowertounit(panelD).
4. Check the hose cuff(s) and hose clamp(s) for loose-
nesscreatedduringshipment.
5. Re-attachthe weather cover top and panels C and D
whichwere removed in step#1.
6. Check that all bolts are securely fastened.
7. Connect steam dispersion device(s) to the outlet(s) on
thehumidifier.
8. Verify that a good seal is maintained after making the
connections.
NOTES:
The bottom of the weather cover is open to accomodate
pipingand electricalconnections. These connections
must be run in watertight plastic conduit due to the
outdoorenvironment.
Other modifications may need to be made by the installer
including:
•freeze protection on all water piping
•insulationofhardpiping betweenhumidifierand
dispersion device
Maintenance:
Periodic maintenance of the weather cover itself is
recommendedinordertoinsureit'scontinuedwind/water
proof state.
1. Periodically check the condition of the gasket(s).
Replaceas needed or on anannual basis.
2. Annually check for loose bolts or connections.
3. Annually check the hose cuff(s) for signs of wear.
Replaceas needed or on anannual basis.
4. Annually check the cover for any signs of corrosion or
degradation.Repairasneeded.
Figure11-1: VLCWeather Cover

12
WEATHER COVER DIMENSIONS
Figure12-1:WeatherCoverExplodedView
Table 12-1: 3, 6, 9, and 12 Heater Overall Dimensions of Weather Cover
Panel A
Top Panel
Panel D
Panel C
OM-906A
Panel B
Figure12-2:WeatherCoverDimensions
OM-904
Panel
Identification
Label
BETL Certification Label
A
C
Product Identification Label
D
:2-21erugiF retteLtuollaC noitpircseDtuollaC eerhT sehcni( eerhT )mm( xiS sehcni( xiS )mm( eniN )sehcni( eniN )mm( evlewT )sehcni( evlewT )mm(
AthgieH ¾050921 ¾050921 ¾050921 ¾050921
BhtgneL ½3200623518045101 ½745021
ChtdiW 52536 ½32006 ½32006 ½32006
DmottobmorfecnatsiD ¾7002 ¾7002 ¾7002 ¾7002

13
RAPID-SORB®ASSEMBLY AND INSTALLATION
Instructions for Horizontal Duct
1. Unpack shipment and verify receipt of all
RAPID-SORBcomponents with packinglist. Report
any shortages to the DRI-STEEM factory immediately.
2. Provide necessary access in and around duct work.
3. Locate 1" x 1½" (25 mm x 38 mm) stainless steel
channel inside the duct. Hang the channel from the top of
the duct, centered between duct side walls, with the two
mountingholesprovided.
4. If hose cuffs are used, slide cuffs over the open end of
each tube. Install a pair of hose clamps on each tube.
5. Note direction of air flow within duct, then arrange each
dispersiontube so steamwill dischargeperpendicular to
the air flow. Use the hex bolts provided to attach tubes to
overhead 1" x 1½" (25 mm x 38 mm) channel. Do not
secure. If the header is outside the duct (see figure 13-2),
punch-out necessary clearance holes in the base of the
duct to slide dispersion tubes up from bottom.
6. For a Header Inside the Duct (See figure 13-1.):
Punch or cut out necessary clearance holes for
RAPID-SORBheader. Slideheader into theduct, position
header and slide the dispersion tube hose cuffs or slip
couplingsovertheheaderdispersiontubenipples.
Position the header so vertical dispersion tubes are
perpendicularto duct andpitch theheaderto condensate
drain.Secure headerto the mounting bracket. Use
escutcheon plates to secure header where it enters the
duct.
Checkthat thedispersion tubesdischarge steamperpen-
dicular to the air flow. Secure tubes to the overhead
channel. Secure the channel to the duct. Position hose
cuffs or slip couplings over tube and header tube nipples,
and secure with clamps.
ForaHeaderOutside the Duct(Seefigure13-2.):
Positionheader under dispersiontubes, thenslide hose
cuffs or slip couplings over header dispersion tube nipples.
Positiontheheadersodispersiontubesareperpendicular
to duct and pitch the header to condensate drain. Secure
dispersion tubes in place with the tube escutcheon plates
provided.
Check the position of the tubes for steam release perpen-
dicular to the air flow. Secure tubes to the overhead
channel, and secure channel to the duct. With header
pitched to condensate drain, slip hose cuffs or slip
couplings over tube nipples and secure with clamps.
7.Connect a condensatedrain to theheader, provide the
water trap as shown, and run to open drain, sized accord-
ing to local codes.
8. Attach the header steam supply connector to main
header using the hose cuff and clamps provided, but do
notsecure.
9. Route the necessary number of vapor hoses or pipes
from the humidifier tank, position connector to accept the
hoses or pipes and secure.
Note:Refertopage 15forvapor hoseinformation on
routingandfor alternate vaporhoseinstallation methods.
Figure13-1: RAPID-SORBUnit
HeaderInsideDuct Top of
Duct
or Casing
OM-102
Condensate
Drain, 3/4" NPT
3/4" (20 mm)
Copper
Air Gap
*Open Drain
Pitch 1/8"
per foot
(10 mm/m)
minimum
Hose Cuff
and Clamps
VAPORSTREAM®Model
VLC Humidifier
Orificed
Tubelets
A
A
Dispersion
Tube
3/8-16 x ½"
Hex Head
Bolt
1" x 1-1/2" (25 mm x 38 mm)
S.S.T.Channel (by DRI-STEEM)
Duct
Escutcheon
Plate
Figure13-2: RAPID-SORBUnit
HeaderUnderDuct
Slip Coupling
or Hose Cuff
ViewA-A
* Refer to local codes for drain pipe size requirements.
OM-101
Dispersion Tube
Orificed
Tubelets
Slip
Coupling or
Hose Cuff
Optional Companion
Flange or Threaded
Connection for Hard Piping
Header Condensate
Drain,3/4" NPT
3/4" (20 mm)Copper
Air Gap
*Open Drain
5"
(125
mm)
Min.
6"
(150
mm)
Min.
Nut and
Bolt
Duct or
Casing
1" x 1-1/2" (25 mm x 38 mm)
S.S.T. Channel (by DRI-STEEM)
Pitch 1/8" per foot (10 mm/m) minimum
Mounting
Channel
Mounting
Nut
5"
(125
mm)
Min.
6" (150
mm) Min.

14
Figure 14-1: Plan View
Steam
Supply
1/8" per foot
(10mm/m)
pitch minimum
Drain
RAPID-SORB®ASSEMBLY AND INSTALLATION
VerticalDuct Installation
Installthe RAPID-SORBwith dispersiontubes and header
pitchedto condensate drainas shownin figures14-1,14-2,
and14-3.
See "Instructions for Horizontal Duct" for additional
informationonpage 13,asapplicable.
Figure 14-2: Elevation View Tube without Drain
Figure 14-3: Elevation View Tube with Drain Table 14-1*: Maximum Steam Carrying Capacity in
Lbs/HrandKg/Hr
6" (150 mm) Min.
5" (125 mm) Min.
Recommended 2" per
foot (165 mm/m) pitch
Airflow
* Based on total pressure drop in piping/hose of 5" (12.65 mm) W.C.
** For developed length add 50% to measured length for pipe fittings.
Note: To minimize lossof humidifier capacity and efficiency, it is recommended
that tubing/piping be installed.
1/4" NPT
Open Drain
3/4" NPT
Coupling
Condensate
Drain
Piping by others
Recommended 1/8" per foot
(10 mm/m) pitch minimum
Airflow
5" (125
mm)Min. 6" (150
mm) Min.
5" (125
mm) Min.
Vapor Hose Copper or Stainless Steel Tubing and
Schedule 40 Steel Pipe
Hose I.D. Developed Length
of 10’(3.0 Meters)** Tube or Pipe Size Base on Developed Length of 20’(6 Meters)**
1
1
/ 2 " (38 mm) 150 lbs/hr 68 kg 1
1
/ 2 " (38 mm) 150 lbs/hr 68 kg/h
2" (50 mm) 250 lbs/hr 115 kg 2" (50 mm) 220 lbs/hr 100 kg/h
3" (75 mm) 450 lbs/hr 205 kg/h
4" (100 mm) 750 lbs/hr 340 kg/h
5" (125 mm) 1400 lbs/hr 635 kg/h
6" (150 mm) 2300 lbs/hr 1043 kg/h

15
Figure 15-1: Piping method recommended when
obstructionpreventsdispersiontubefrombeing
continuouslypitchedback tohumidifier:
Drain Piping
A drain line should be extended from the skimmer
connection to a sanitary waste or suitable drain. If non-
metallic pipe or hose is used, it must be capable of
withstandingtemperaturesupto212°F(100°C).
To prevent steam from escaping out the drain line, a
water seal must be provided in the drain line of sufficient
heightto containthe pressuredeveloped withinthe
humidifier and steam dispersion system. To determine
the proper height of the water seal, see table 16-1.
Make-up Water Piping
When non-metallic water piping is used, it must be rated to
withstand212°F (100°C) orgreater temperature. Ifnot,
the final three feet (one meter) connected to the humidifier
should be metallic and should not be insulated.
As part of the fill valve assembly, the needle valve
restricts the rush of cold water entering the evaporating
chamber during the fill cycle. Cold water could drop the
chamber water temperature and collapse the steam. If the
rumbling sound occurs during the fill cycle, adjust the
needle valve to decrease the water fill rate.
TheVAPORSTREAM®Model VLC has a one-inch (25
mm)internal “air gap”. However,local codesmay require
avacuumbreaker.
PIPING METHODS
Figure 15-2: Piping method recommended when
humidifier must be mounted higher than the duct:
* Refer to local codes for drain pipe size requirements.
2" Per Foot
(165 mm/m) Pitch
5" (125 mm) Min.
Funnel or Floor Drain*
OM-699
Optional SST Tubing Tee
OM-698 Funnel or Floor Drain*
Obstruction
¾" (20 mm) Tubing
5" (125 mm)
Min.
4" (100
mm) Min.

16
PIPING DIAGRAMS: STEAM, WATER AND DRAIN
Alternate Water Seal and Drain Valve Piping (by installer)
Usedwhenwatersealmustbeelevatedaboveflowlineofdrainconnection(humidifiernearfloor)
StandardUnit(Non-DI/ROWater)
Note: Drain piping material must be suitable for 212°F (100°C) water.
DI/ROWaterUnit
Table16-1: WaterSeal Height (H)
Recommendations
Note: If piping to dispersion tube is over 20 feet (6
meters)increasewatersealheightby15%.
OM-633
¾" (20 mm)
SST Drain Valve
H
Float Operated Water
Make-up Valve
Overflow - ¾" (20 mm)
¼" (6 mm) NPT Water Supply,
25 psi minimum, (172 kPa)
Drain and Water Seal
Piping - ¾" (20 mm)
(by installer)
Air Gap
Open Drain *
Float Operated
Low-Water Cut-off
Heaters
OM-634
Heaters H
Clean-out Tray
Clean-out
Plate
Three Probe Level Control
and Low-Water Cut-off Drain
Connection Open Drain*
Air Gap
Drain and Water Seal Piping - ¾" (20 mm)
(by installer)
Manual or Optional Electric Drain Valve
Water Supply Line (25 psi minimum)
Water Skim/Overflow Outlet - ¾" (20 mm)
Needle Valve
Solenoid Water Make-up Valve
* Refer to local codes for drain pipe sizing and maximum temperature requirements.
OM-635
Solenoid Water
Make-up Valve Needle
Valve Water Skim/
Overflow Outlet
Water Supply Line,
25 psi minimum,
(172 kPa)
Note: Flow
Line of Water
Seal cannot
be above Flow
Line of
Skimmer
Outlet
Air Gap
Open Drain*
Manual or Optional Electric Drain Valve
Drain Connection
Clean-out Plate
reifidimuHrH/sbLh/gK thgieH )sehcnI( thgieH )mm(
WK84otpU831-526-221503
otWK94 WK46 381-93138-3651083
otWK56 WK001 722-481301-4881064
Field installed for
clean-out

17
START-UP PROCEDURE
Introduction
After the system has been properly installed and con-
nected to both electrical and water supplies, it may then
bestarted.
Start-up and Checkout Procedures
Mounting
Check mounting to see that unit is level and securely
supportedbeforefillingwithwater.
Piping
Verify that all piping connections have been completed as
recommendedandthatwaterpressureisavailable.
Electrical
Verify that all wiring connections have been made in
accordancewith allgoverning codesand the enclosed
VAPORSTREAM®VLCwiringdiagram.
Caution: Only qualified electrical personnel
should perform start-up procedure.
ControlSystem
Forstart-up instructions, seethe operations and mainte-
nance manual for your humidifier control system.
OPERATION
Foroperatinginstructions,seetheVAPOR-LOGIC®
InstallationInstructionsandMaintenanceOperations
Manual.
Caution: Overtightening cover will cause leaks.
All cover knobs are turned down at the factory until the
bottom of the knob makes contact with the flange, then
one half turn further. If more compression is required,
turn all knobs a half turn more. Do not turn knobs more
than a half turn before identifying that a leak still exists.

18
RECOMMENDED MAINTENANCE
VAPORSTREAM®Model VLC Only
Usingsoftened waterwill significantly reduce mineral
build-up in the humidifier. When softened water is not
available, the VAPORSTREAM VLC is designed to deal
with water hardness in one of two ways depending on the
degree of hardness. For light to moderate hardness, up to
10 grains per gallon ( 170 mg/l), using the surface water
skim time feature with annual cleaning is recommended.
Forhighmineral contentwater,above 10 grainspergallon
(170mg/l), aperiodic drainand flushthrough the motor-
ized drain valve, in addition to the surface water skim time
feature,is recommended. Thefrequency of cleaningwill
dependonwaterconditionandevaporationload.
The humidifier should be inspected for leaks at least
annually. Also, the current draw of the heaters should be
checked and all safety devices in the control circuit should
be cycled on and off to verify that they are functioning.
Caution: Whenperformingmaintenanceonthe
VAPORSTREAMModelVLC,alwayssetcontrolmodule
switchto"STBY”position,placemaindisconnectin“OFF”
position,andclosemanualwatershut-offvalve.
SeasonallyorasRequired
1. Cleaning Tank - Slide the clean-out tray out and
dispose of any loose scale that has collected in the tray.
Thisshouldbe donebefore thebuild-upreaches the
undersideoftheheatingelements.
2. Cleaning Probes - Disconnect the plug and cable
assemblyand unscrew theprobe holderfrom the
VAPORSTREAM VLC unit. The scale will easily flake off
from the sensing portion. The sensing portion, bottom
3/8" (10 mm), of the probe should be brushed clean with
stainless steel wool.
3. Cleaning Skim Overflow Port - Loosen deposits with
a long tool, such as a screwdriver. Proper skimmer
drainage should be verified by a weekly visual inspection.
Water should drain from skimmer drain pipe after each fill
cycle. (For cleaning piping, disconnect and flush out. If
mineraldeposits have restrictedthe flow, replacepiping.)
SummerMaintenance
After the humidification season, a complete inspection and
cleaning of the heaters, probe control, skimmer port, and
water chamber is recommended. After cleaning, the unit
should remain empty until humidification is required.
AdjustingtheSurfaceSkimBleed-OffQuantity
The skim time determines the quantity of water skimmed
with each fill cycle. The skim time is field adjustable
using the VAPOR-LOGIC®keypad.
Each time the VAPORSTREAM VLC refills, it fills to an
elevation near the lip of the skim overflow fitting. A
portion of the refill water then flows to drain carrying the
minerals floating on the water with it. This reduces the
mineralconcentration,therebyreducingthefrequencyof
cleaningneeded.
The heated water that flows to drain is a cost of
operation. Cleaningthehumidifier is alsoanoperational
cost. Therefore, it is recommended that the user observe
and adjust the skimming quantity. By doing so, a balance
betweenminimizingmineralbuild-upandconservinghot
watercan be achieved.
VAPORSTREAM Model VLDI Only
The humidifier should be inspected for leaks at least
annually. Also, the current draw of the heaters should be
checked and all safety devices in the control cabinet
should be cycled on and off to verify that they are func-
tioning.
Make-upWaterPiping
Use cold or hot makeup water. If the water pressure is
above60psi (410 kPa)and/orwater hammerwouldbe
objectionable,apressure reducingvalveor shockarrester
should be installed. Even though the VAPORSTREAM
VLC has an internal 1" (25 mm) air gap, some local codes
mayrequireavacuumbreaker.
Caution: Minimum water supply pressure is 25 psi (172
kPa).
CleaningEvaporatingChamber
As long as mineral-free water is used in the
VAPORSTREAM VLDI, no cleaning or flushing of the
evaporatingchambershouldbenecessary.
Fortrouble-shootinginstructions,seetheVAPOR-LOGIC®
InstallationInstructionsandMaintenanceOperations
Manual.
TROUBLE-SHOOTING GUIDE

19
REPLACEMENT PARTS
VAPORSTREAM®Model VLC Humidifier
TAB - Specify humidifier model and serial
numbers when ordering.
Notes:
1. For dispersion tube(s) specify type
(L-tube, straight tube, RAPID-SORB®, etc)
humidifiermodel andserial numbers.
2. Parts not itemized are typical hardware
stock items.
OM-907
No. Description Part No.
1 Tank 167700-TAB
2 Cover, One Heater 167710-TAB
2 Cover, Three Heater 167715-TAB
2 Cover, Six Heater 167720-TAB
2 Cover, Nine Heater 167725-TAB
2 Cover, Twelve Heater 167730-TAB
3 Cover, Heater Louvered 167740-TAB
4 Knob, T-Handled Utility 700725
5 Heater 409600-TAB
6 Gasket, Cover 160691-TAB
7 Clean-Out Plate 165472
8 Gasket, Clean-Out Plate 308225
9 Switch Door Interlock 408475
10 Thermal Cut-Out 409560-001
11 Valve, ¾" Ball (Manual Drain) 505011
12 Valve, ¾" Electric (Auto Drain) 505400-001
13 Probe Plug 406050-004
14 Probe Housing 308500
15 Probe Assembly 406015
16 Gasket, Probe 309750-004
17 Strainer, ¼" Sediment 300050
18 Valve, ¼" Needle 505070-001
19 Fill Valve, ¼" Solenoid 505084
20 Clean-Out Tray 167770-TAB

20
VAPORSTREAM Model VLDI Humidifier
OM-908
No. Description Part No.
1 Tank 167700-TAB
2 Cover, One Heater 167710-TAB
2 Cover, Three Heater 167715-TAB
2 Cover, Six Heater 167720-TAB
2 Cover, Nine Heater 167725-TAB
2 Cover, Twelve Heater 167730-TAB
3 Cover, Heater Louvered 167740-TAB
4 Knob, T-Handled Utility 700725
5 Heater 409600-TAB
6 Gasket, Cover 160691-TAB
7 Clean-Out Plate 165472
8 Gasket, Clean-Out Plate 308225
9 Switch Door Interlock 408475
10 Thermal Cut-Out 409560-001
11 Valve, ¾" Ball (Manual Drain) 505000-001
12 Float Valve Assembly 505210
13 DI Housing 167780
14 Gasket, Low Water Tube 160698
15 Low Water Tube 167785
16 Low Water Cut-Out Switch 408420-001
TAB - Specify humidifier model and serial numbers when ordering.
Notes:
1. For dispersion tube(s) specify type (L-tube, straight tube,
RAPID-SORB®,etc) humidifier modeland serial numbers.
2. Parts not itemized are typical hardware stock items.
REPLACEMENT PARTS