DriSteem HUMIDI-TECH User manual

HUMIDI-TECH®
Electric Humidifier
Installation, Operation,
and Maintenance Manual
READ AND SAVE THESE INSTRUCTIONS

ii DRISTEEM HUMIDI-TECH ELECTRIC HUMIDIFIER INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
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.
DriSteem 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.
Warnings and cautions
WARNINGS AND CAUTIONS

iii
DRISTEEM HUMIDI-TECH ELECTRIC HUMIDIFIER INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Warnings and cautions
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®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 DriSteem 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.
WARNINGS AND CAUTIONS

iv DRISTEEM HUMIDI-TECH ELECTRIC HUMIDIFIER INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
WARNINGS AND CAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
OVERVIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Capacities, electrical specifications, and weights . . . . . . . . . . . . . . . . . . 4
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Selecting a location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Mounting the humidifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Piping: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
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: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Selecting the dispersion assembly location . . . . . . . . . . . . . . . . . . . 15
Interconnecting piping requirements. . . . . . . . . . . . . . . . . . . . . . . . 16
Interconnecting piping requirements. . . . . . . . . . . . . . . . . . . . . . . . 17
Drip tee installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
SDU-I and SDU-E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Single tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Rapid-sorb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table of contents
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
• Catalogs
– Humidi-tech
– Ultra-sorb®
• Installation, Operation, and Maintenance
manuals (IOM)
– Ultra-sorb
– Vapor-logic controller (includes
humidifier operation and troubleshooting)
• DriSteem Humidification System Design
Guide (includes steam loss tables and
general humidification information)

1
DRISTEEM HUMIDI-TECH ELECTRIC HUMIDIFIER INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Table of contents
Start-up procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Start-up checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Tap/softened water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Ultra-sorb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
DI/RO water option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
DI/RO water option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Keypad/display and troubleshooting
The Vapor-logic 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 DriSteem literature
Most DriSteem product manuals can be
downloaded, printed, and ordered from our
web site: www.dristeem.com

2DRISTEEM HUMIDI-TECH ELECTRIC HUMIDIFIER INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Product Overview
FIGURE 2-1: INSTALLATION OVERVIEW
(HUMIDI-TECH FOR TAP/SOFTENED WATER SHOWN)
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
OM-82-4
Notes:
See Pages 8 and 9 for detailed
installation drawings.
Damage caused by chloride corrosion is not
covered by your DriSteem warranty.
OVERVIEW
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.
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 DriSteem
representative or distributor for parts and instructions.
FIGURE 2-2: WATER LEVEL CONTROL
FOR TAP/SOFTENED WATER HUMIDIFIER
FIGURE 2-3: WATER LEVEL CONTROL
FOR DI/RO WATER OPTION HUMIDIFIER

3
DRISTEEM HUMIDI-TECH ELECTRIC HUMIDIFIER INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Product overview
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
OM-56-1
Remote from humidifier
Directly above humidifier
OM-55-1
Air
intake
vents
Steam
outlet
OM-636-1
OM-637-1
FIGURE 3-1: ULTRA-SORB DISPERSION
FIGURE 3-2: RAPID-SORB DISPERSION
FIGURE 3-3: SDU MOUNTING OPTIONS

4DRISTEEM HUMIDI-TECH ELECTRIC HUMIDIFIER INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
OVERVIEW
Capacities, electrical specifications, and weights
DC-1168
Hose clamp (for vapor hose)
Table 4-2:
Steam connection sizes
HT model Steam outlet
2, 4, 6, 8 1 1/2" hose or BSP connection
10*, 12*, 14*, 16* 1 1/2" 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:
• SDU-I is available for Models HT-2 through HT-10.
• SDU-E is available for all models, except Model HT-2 and Models HT-16 through HT-34.
• Models with the SDU option have additional electronic components in the Humidi-tech cabinet. If adding an SDU, add the following to the
Humidi-tech shipping and operating weights:
SDU-E: 5.5 kg
SDU-I: 4.0 kg
• All Humidi-tech humidifiers operate at 50/60 Hz.
• SDUs ship separate from the Humidi-tech.
FIGURE 4-1: STEAM OUTLET CONNECTIONS

5
DRISTEEM HUMIDI-TECH ELECTRIC HUMIDIFIER INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Dimensions
OVERVIEW
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
FIGURE 5-1: HUMIDI-TECH DISPERSION

6DRISTEEM HUMIDI-TECH ELECTRIC HUMIDIFIER INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Selecting a location
INSTALLATION
HUMIDIFIER
When selecting a location for the humidifier, consider the following:
• 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.
• Elevation of the installed dispersion assembly
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.
• Required clearances (see Figure 7-1)
• Electrical connections
Electrical power supply connections are at the lower or upper right rear
corner of the unit. See “Wiring” on Pages 12 and 13.
• Supply water and drain piping connections
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.
• Exterior wall insulation
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.