DriSteem HUMIDI-TECH User manual

Humidi-tech®
Electric Humidifier
Installation, Operation,
and Maintenance Manual

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WARNING CAUTION
Indicates a hazardous situation that could result in death or
serious injury if instructions are not followed.
Indicates a hazardous situation that could result in damage to
or destruction of property if instructions are not followed.
WARNING
Attention installer
Read this manual before installing, and leave this manual with product owner. This product must be installed by
qualified HVAC and electrical contractors and in compliance with local, state, federal, and governing codes. Improper
installation can cause property damage, severe personal injury, or death as a result of electric shock, burns, or fire.
DRI-STEEM Technical Support: 800-328-4447
Read all warnings and instructions
Read this manual before performing service or maintenance procedures on any part of the system. Failure to follow all
warnings and instructions could produce the hazardous situations described, resulting in property damage, personal
injury, or death.
Failure to follow the instructions in this manual can cause moisture to accumulate, which can cause bacteria and mold
growth or dripping water into building spaces. Dripping water can cause property damage; bacteria and mold growth
can cause illness.
Hot surfaces and hot water
This steam humidification system has extremely hot surfaces. Water in tanks, steam pipes, and dispersion assemblies
can be as hot as 212 °F (100 °C). Discharged steam is not visible. Contact with hot surfaces, discharged hot water, or
air into which steam has been discharged can cause severe personal injury. To avoid severe burns, follow the cool-
down procedure in this manual before performing service or maintenance procedures on any part of the system.
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WARNING
Disconnect electrical power
Disconnect electrical power before installing supply wiring or performing service or maintenance procedures on any
part of the humidification system. Failure to disconnect electrical power could result in fire, electrical shock, and other
hazardous conditions. These hazardous conditions could cause property damage, personal injury, or death.
Contact with energized circuits can cause property damage, severe personal injury, or death as a result of electrical
shock or fire. Do not remove humidifier electrical panel cover, heater terminal cover, or subpanel access panels until
electrical power is disconnected.
Follow the shutdown procedure in this manual before performing service or maintenance procedures on any part of
the system.
Electric shock hazard
If the humidifier starts up responding to a call for humidity during maintenance, severe bodily injury or death from
electric shock could occur. To prevent such start-up, follow the procedure below before performing service or
maintenance procedures on this humidifier (after the tank has cooled down and drained):
1. Use Vapor-logic®4 keypad/display to change control mode to Standby.
2. Shut off all electrical power to humidifier using field-installed fused disconnect, and lock all power disconnect
switches in OFF position.
3. Close field-installed manual water supply shut-off valve.
CAUTION
Hot discharge water
Discharge water can be as hot as 212 °F (100 °C) and can damage the drain plumbing.
To prevent such damage from humidifiers without water tempering, allow the tank to cool before draining.
Humidifiers equipped with a water tempering device such as a DRI-STEEM Drane-kooler need fresh make-up water in order
to function properly. Make sure the water supply to the water tempering device remains open during draining.
Excessive supply water pressure
Supply water pressure greater than 80 psi (550 kPa) can cause the humidifier to overflow.

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Warnings and cautions................................. ii
Overview
Product overview
Tap/softened water...................................2
DI/RO water option .................................. 2
Water type conversion................................2
Dispersion options ...................................3
Capacities, electrical specifications, and weights ..............4
Dimensions..............................................5
Installation
Selecting a location
Humidifier..........................................6
Dispersion control devices ............................ 6
Mounting the humidifier ..................................7
Piping:
Tap/softened water .....................................8
DI/RO water option ....................................9
Supply water and drain piping ..........................10
Drane-kooler .........................................11
Wiring .................................................12
Humidistat and transmitter placement .....................14
Dispersion:
Selecting the dispersion assembly location ................15
High-efficiency Tube option ............................15
Interconnecting piping requirements
Connecting to humidifier with vapor hose .............16
Connecting to humidifier with tubing or pipe ..........17
Drip tee installation ...................................18
SDU-I and SDU-E
Mounting SDU-I and SDU-E.........................19
SDU-I: Instant, internal absorption....................19
SDU-E: Higher capacity .............................19
SDU-E condensate drain connection ..................22
Mounting SDU-E ...................................22
SDU-E rise, spread, and throw........................23
Single tube ...........................................24
Rapid-sorb
Pitch requirements ..................................27
Header outside of duct, horizontal airflow. . . . . . . . . . . . . . 28
Header inside of duct, horizontal airflow...............30
Steam supply connections to Rapid-sorb header ........32
Condensate drain connections to Rapid-sorb header ....32
Ultra-sorb............................................32
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ATTENTION INSTALLER
Read this manual before installing.
Leave manual with product owner.
Where to find more information
Our web site:
The following documents are available on
our web site: www.dristeem.com
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– Humidi-tech
– Ultra-sorb®
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manuals (IOM)
– Ultra-sorb
– Vapor-logic4 controller (includes
humidifier operation and troubleshooting)
t
DRI-STEEM Humidification System Design
Guide
(includes steam loss tables and
general humidification information)

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Keypad/display and troubleshooting
The
Vapor-logic4 Installation and Operation
Manual,
which was shipped with your
humidifier, is a comprehensive operation
manual. Refer to it for information about
using the keypad/display and Web interface,
and for troubleshooting information.
Download DRI-STEEM literature
Most DRI-STEEM product manuals can be
downloaded, printed, and ordered from our
web site: www.dristeem.com
Operation
Start-up procedure ......................................33
Start-up checklist........................................34
Maintenance
Tap/softened water
Water quality and maintenance.......................35
Skim duration ......................................35
Cool down humidifier ...............................36
Inspection and maintenance..........................36
Off-season shut-down procedure .....................39
DI/RO water option
Cool down humidifier ...............................40
Inspection and maintenance..........................40
Off-season shut-down procedure .....................41
Replacement parts
Humidifier .............................................42
SDU-E .................................................44
SDU-I .................................................45
Subpanel ...............................................46
Warranty ................................... Back cover

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Bracket under evaporating chamber
allows easy removal for cleaning
Removable
evaporating
chamber
Water fill
access hole
Incoloy alloy-sheathed
immersion heaters
Keyholes
for wall
mounting
Water fill Electrical area
Skimmer port
and overflow
drain
Electrical conduit knockouts
Flexible vapor hose,
pipe, or tubing
connects to dispersion
tube(s) or to an SDU Duct
Single
dispersion
tube with
condensate
return line
Figure 2-3:
Installation overview
(Humidi-tech for tap/softened water shown)
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OM-82-4
Notes:
See Pages 8 and 9 for detailed installation
drawings.
Damage caused by chloride corrosion is not
covered by your DRI-STEEM warranty.
Overview
Figure 2-2:
Water level control for DI/RO water
option humidifier
Supply water connection
Float rod
Float ball
OM-7396
Humidifiers using tap or softened water
control water levels electronically using a
three-rod probe. The controller responds
with the above actions when the water level
reaches each rod.
Figure 2-1:
Water level control for tap/softened
water humidifier
VLC-OM-030
Fill valve opens when water
level is below this probe.
Low-water cutoff. Power to
heaters is cut if water level
drops below this probe.
Fill valve closes when water
level rises to this probe.
Humidifiers using DI/RO water control water
levels using a float valve and low-water
cutoff switch.
Tap/softened water
Humidi-tech humidifiers with tap/softened water (shown above)
use electricity to heat tap or softened fill water into steam for
humidification. A conductivity probe monitors the water level;
therefore, water conductivity must be at least 30 μS/cm for proper
operation. Humidi-tech with tap/softened water will not operate
with DI/RO water. For DI/RO water, use Humidi-tech with the
DI/RO water option.
DI/RO water option
Humidi-tech humidifiers with DI/RO water systems (systems using
deionized water or water that has been treated using reverse osmosis)
use electricity to heat DI/RO fill water into steam for humidification.
Water level is controlled with a float valve and low water cutoff
switch. Float valves are compatible with DI/RO water only.
Humidifiers with the DI/RO water option are virtually maintenance
free and require little or no downtime.
Water type conversion
Humidi-tech tap/softened water humidifiers can be converted in
the field for use with DI/RO water, and Humidi-tech DI/RO water
humidifiers can be converted in the field for use with tap/softened
water. Contact your DRI-STEEM representative or distributor for
parts and instructions.

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Dispersion options
In addition to single tube dispersion, shown in Figure 2-3,
the dispersion options shown on this page are available for
Humidi-tech humidifiers. See the installation instructions
beginning on Page 19.
Overview
Figure 3-3:
SDU mounting options
OM-56-1
Remote from humidifier
Directly above humidifier
OM-55-1
Air
intake
vents
Steam
outlet
Figure 3-1:
Ultra-sorb dispersion
OM-636-1
Figure 3-2:
Rapid-sorb dispersion
OM-637-1

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Overview
Figure 4-1:
Steam outlet connections
DC-1168
Hose clamp (for vapor hose)
Table 4-2:
Steam connection sizes
HT model Steam outlet
2, 4, 6, 8 1 ½" hose or
BSP connection
10*, 12*, 14*, 16* 1 ½" or 2" hose or
BSP connection
21, 25, 30, 34 2" hose or
BSP connection
* If using with an SDU-E (Space Dispersion Unit
External Absorption), the Humidi-tech steam outlet
must be 2" to match the SDU-E steam inlet.
The steam outlet is designed to connect to a
vapor hose or BSP connection.
Tap/softened water Humidi-tech shown.
Table 4-1:
Humidi-tech electrical specifications, capacities and weights
HT model Single-phase 230V Three-phase 400V Shipping
weight (kg)
Operating
weight (kg)
kW Steam capacity (kg/h) I max. (A) Steam capacity (kg/h) I max. (A)
2 2.5 8.0 — — 37 44
4 5.0 16.0 5.4 8.7* 37 44
6 7.5 24.0 8.2 13.0* 41 56
8 10.0 31.9 10.9 17.3* 41 56
10 12.5 39.9 13.6 15.2* 43 64
12 15.0 47.9 16.3 17.3 43 64
14 — — 19.1 20.2 43 64
16 — — 21.8 23.1** 43 64
21 — — 28.6 30.3** 44 70
25 — — 34.0 36.1** 44 70
30 — — 40.8 43.3** 47 72
34 — — 46.3 49.1** 47 72
*For wire sizing, the highest leg draw is shown due to current imbalance.
** No available SDU option for these models.
Notes:
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and operating weights:
SDU-E: 5.5 kg
SDU-I: 4.0 kg
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Overview
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Figure 5-1:
Humidi-tech dimensions
DC-1167
50 mm
Venting
13 mm hole in base for water fill line
Steam outlet
Top view 614 mm
Left side view Front view
Bottom view
57 mm
409 mm
472 mm
57 mm
614 mm
19 mm
276 mm 50 mm
25 mm
57 mm 38 mm
146 mm
DN20 pipe thread frame drain
DN20 pipe thread tank drain
16 mm
38 mm
146 mm
Control or SDU wiring knockout
Power wiring knockout
Control or SDU wiring knockout
Power wiring knockout

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Humidifier
When selecting a location for the humidifier, consider the
following:
t Proximity to the duct
Install the humidifier near the air duct system where
the dispersion assembly will be located. The maximum
recommended length for steam hose connecting a single
humidifier to a dispersion assembly is 3 m. The maximum
recommended developed length for tubing or pipe connecting a
single humidifier to a dispersion assembly is 6 m.
For more information about installing dispersion assemblies, see
“Dispersion,” beginning on Page 15.
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The recommended installation location for the dispersion
assembly is at an elevation higher than the humidifier. However,
if the dispersion assembly must be installed at an elevation lower
than the humidifier, install a drip tee and drain. See “Drip tee
installation” on Page 18.
Before installing a dispersion assembly or interconnecting
piping, review all pitch requirements in the “Dispersion” section
of this manual.
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Electrical power supply connections are at the lower or upper
right rear corner of the unit. See “Wiring” on Pages 12 and 13.
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Water supply piping and drain connections are at the lower
left rear corner of the unit. See the piping illustrations and
instructions starting on Page 8.
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Install the humidifier on an exterior wall only if the wall is
properly insulated.
Dispersion control devices
See Figure 14-1 for recommended installation locations for the
dispersion assembly and associated control devices.
Installation