DriSteem Ultra-sorb XV User manual

ULTRA-SORB®MODEL XV
Steam Dispersion Panel
Installation, Operation,
and Maintenance Manual
READ AND SAVE THESE INSTRUCTIONS
For pressurized steam applications

ii ULTRA-SORB MODEL XV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Table of contents
ATTENTION INSTALLER
Read this manual before installing.
Leave manual with product owner.
DriSteem technical support
800-328-4447
WARNING
Hot surface hazard
Steam humidification systems have
extremely hot surfaces.
To avoid burns, allow humidifier, steam
pipes, and dispersion assemblies to
cool before touching any part of the
system.
mc_071411_0753
MECHANICAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Field assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Selecting the location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Mounting and support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Installation in a cold air stream . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Placement upstream from an elbow or duct split . . . . . . . . . . . . . . . . 8
Installation above valuable equipment . . . . . . . . . . . . . . . . . . . . . . . 8
Panel support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Mounting in a duct . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Mounting in an air handler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Installation drawings:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Mounting in a duct . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Mounting in an air handler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Recommendations and steam inlets . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Confirming steam dispersion panel configuration . . . . . . . . . . . . . . 13
Optional header overflow P-trap water seal . . . . . . . . . . . . . . . . . . 17
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Ultra-sorb XV operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Sequence of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Start-up checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Performance data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Strainer, traps, and valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Dispersion tubes and heat exchanger . . . . . . . . . . . . . . . . . . . . . . . . . 30
Humidifier de-scaling solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Replacement parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

1
ULTRA-SORB MODEL XV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Mechanical specifications
OM-7483
mc_101410_0755
Top view
Elevation view
Blank
side view
Header
Connections
side view
A
A’
B’
C
D
B
F
E
G
H J K
L
Table 1-1:
Ultra-sorb Model XV dimensions
Dimension Inches (mm)
AUnit width
15" (380 mm) min,
147" (3735 mm) max,
in 1" (25 mm) increments
A' Face width
12" (305 mm) min,
144" (3660 mm) max,
in 1" (25 mm) increments
BUnit height*
21.75" (550 mm) min,
153.75" (3905 mm) max,
in 1" (25 mm) increments
B' Face height
12" (305 mm) min,
144" (3660 mm) max,
in 1" (25 mm) increments
CFrame depth 7.2" (183 mm)
DFrame enclosure 3.9" (99 mm)
EHeader enclosure 5.85" (149 mm)
FMounting flange 1.5" (38 mm)
GHumidification steam inlet
(internal thread)
• 1" or 2" NPT (DN25 or DN50),
determined by maximum steam
capacity
• 3" (DN80) flange, for humidification
steam from STS humidifier only
HPressurized steam inlet
(internal thread) 3/4" NPT (DN20)
J Float switch or
optional header overflow/
access port (internal thread)
1/2" NPT (DN15)
KPressurized condensate
outlet (internal thread) 3/4" NPT (DN20)
LOverall width
• 1" (DN25) connection, same as
dimension A;
• 2" (DN50) connection, dimension A
+ 1" (dimension A + 25 mm)
• 3" (DN80) flange, dimension A +
6.5" (dimension A + 165 mm)
Control cabinet See Page 17.
* Panels with unit height more than 120" (3048 mm) have two-piece
side flanges and are shipped with brackets for easy field assembly.
Panels with unit height more than 98" (2490 mm) are shipped
unassembled.
Table 1-2:
Ultra-sorb Model XV tube steam capacity*
Diameter lbs/hr kg/h
1.5" 43 19.5
2.0" 80 36.3
* Consult DriSteem if face height is less than 17" (432 mm) for 1.5"
tubes or less than 24" (610 mm) for 2.0" tubes.
FIGURE 1-1: ULTRA-SORB MODEL XV DIMENSIONS
MECHANICAL SPECIFICATIONS

2ULTRA-SORB MODEL XV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Field assembly
UNPACK THE DISPERSION ASSEMBLY
• Remove shipping materials from the dispersion assembly, being careful not
to bump or scrape the white PVDF dispersion tube insulation.
• Do not lay dispersion tubes (if shipped loose by request or by shipping
necessity) across or under anything that could compress or damage the
insulation. Compressing insulating material may reduce its R-value.
VERIFY THAT THE ORDER IS COMPLETE
Verify that all panel and piping components are included in the delivery. Check
the packing list, and see the tables on Page 32.
• Orders may include control valve(s), humidity transmitters or humidistats,
airflow switches, and a control cabinet.
Note the dispersion assembly serial number:
• The serial number will be required to ensure proper identification of
replacement parts.
CAUTION
Remove clear poly film; do not remove white PVDF insulation.
High-Efficiency Tubes are sleeved in clear poly film for protection during processing, shipping, and
installation. Leave the clear poly film on until installation is complete so the insulation stays clean.
Remove and discard the clear poly film before start-up by tearing it along the
perforations. Do not remove the white PVDF insulation.
• Keep flame away from the insulating material to avoid damage.
• Indirect, low-intensity UV-C light from germicidal lamps will not cause the insulating material to degrade.
• Do not tighten mounting clamps or fasteners to any part of the dispersion tube.
mc_071211_1530
INSTALLATION

3
ULTRA-SORB MODEL XV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Field assembly
LAY OUT THE PANEL COMPONENTS
Orient the panel components on a large, flat working surface.
ATTACH THE FLANGES
Guide the flanges onto the threaded studs of the header assembly, and start the
locknuts onto the threads finger-tight.
ATTACH THE TOP FRAME ASSEMBLY
Span the flanges with the top frame assembly. Align the locating buttons on the
flanges and top frame, and insert screws.
TIGHTEN THE FLANGE LOCKNUTS
Torque the eight flange locknuts to 16 ft-lb (22 N-m) using a 7/16" deep-well
socket.
INSTALL THE DISPERSION TUBES
Note: Do not remove the poly film from the dispersion tubes until after the
panel is installed.
Ensure that each dispersion tube has the seal and spring in place (see
Figure 3-1). Push the dispersion tube plug end into the top frame hole
to compress the spring. Seat the seal end in the corresponding header hole
on the bottom. Rotate the dispersion tubes so the tubelets discharge steam
perpendicular to the airstream. See Figure 9-1.
Table 3-1:
Ultra-sorb Model XV components
Component Qty.
Header assembly 1
Dispersion tube Varies
Top frame assembly 1
Flanges 2
Screws 8
Flange locknuts 8
Note: These assembly instructions are for
Ultra-sorb Model XV panels shipped
unassembled by request or as required.
Panels with overall height more
than 98" (2490 mm) are shipped
unassembled.
Header
assembly
Flange
locknut
Screw
Flange OM-7484
Top frame
assembly
Spring Plug
Ring
Seal
Insulation
Dispersion tube
assembly
INSTALLATION
FIGURE 3-1: ULTRA-SORB MODEL XV COMPONENTS

4ULTRA-SORB MODEL XV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Piping
OM-7656d
From
pressurized
steam source
Modulating steam
valve
To condensate
return main
2-position
shutoff valve
Steam
trap
To condensate return main
Ultra-sorb Model XV
steam dispersion panel
Note: Dashed lines indicate provided by installer.
Float switch
Steam trap
OM-7878
From
pressurized
steam source
Modulating
steam valve
To condensate return main
Install inlet strainer
within 3' (1 m) of
Ultra-sorb Model
XV. Strainer should
be same pipe size
or larger than
modulating steam
valve. 2-position
shutoff valve may
be smaller than
strainers and
electric modulating
steam valve.
Steam trap
To condensate return main
Ultra-sorb Model XV
steam dispersion panel
Note: Dashed lines indicate provided by installer.
Temperature switch
(install as close to heat
exchanger outlet as
possible)
Steam trap
Applications with full-time
operation of internal heat
exchanger.
INSTALLATION
Install inlet strainer within
3' (1 m) of Ultra-sorb
Model XV. Strainer
should be same pipe size
or larger than modulating
steam valve. 2-position
shutoff valve may be
smaller than strainers and
modulating steam valve.
FIGURE 4-1: ULTRA-SORB MODEL XV PIPING COMPONENTS WITH ON/OFF
SHUTOFF VALVE, FLOAT SWITCH, PRESSURIZED STEAM SOURCE
FIGURE 4-2: ULTRA-SORB MODEL XV PIPING COMPONENTS WITH TEMPERATURE
SWITCH, PRESSURIZED STEAM SOURCE
Applications with control
cabinet operating internal
heat exchanger.

5
ULTRA-SORB MODEL XV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
INSTALLATION
OM-7902
OM-7654_2016
Connection
end of
header
(see inset
below)
Connection end of header
Humidification steam
from STS humidifier
Pressurized condensate to return main
On-off
solenoid
valve
Inlet
strainer
Steam trap
To condensate return main
Float switch
Steam trap
From pressurized steam source
Dispersion tube
Header
From pressurized
steam source
Modulating
steam valve
Insulated steam
supply tubing
STS humidifier
Open drain
(temper to local code)
Drane-kooler™ water
tempering device
Cold fill water
Isolation valve (by others)
Pressurized steam to heat exchanger
Note: Tubing union shown at steam connection. For STS humidifier,
connection may also be 3" (DN80) flange.
Steam to heat exchanger from pressurized steam source,
humidification steam from STS humidifier
Piping
FIGURE 5-1: ULTRA-SORB MODEL XV PIPING WITH STS HUMIDIFIER
Ultra-sorb XV dispersion panel
On/off valve
(optional)
Pressurized condensate to return main
Steam trap

6ULTRA-SORB MODEL XV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Outside air
Relief air
Preheat coil
Motorized
air dampers
Supply airflow
Filters
Economizer
control device
Heating coil
Cooling coil 10' to 15' (3 to 4.5 m)
Duct high limit humidity control
for dispersion locations A, B
Airflow proving switch
Airflow proving switch
Duct high limit humidity control
for dispersion location C
Return airflow
10' to 15' (3 to 4.5 m)
3' to 5' (1 to 1.5 m)
Fan
ABD
C
Exterior
building
wall
DC-1081
mc_092507_1530
Selecting the location
INSTALLATION
FIGURE 6-1: PLACING A DISPERSION ASSEMBLY IN AN AIR HANDLING UNIT

7
ULTRA-SORB MODEL XV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
• Install the Ultra-sorb panel in a location where discharged water vapor will
be absorbed by the airstream.
• Place the Ultra-sorb panel where the air temperature is capable of
absorbing discharged steam without causing condensation at or after the
unit. This will normally be downstream of the heating coil where the air is
warmest.
• Do not place the Ultra-sorb panel in an outside air intake unless the air is
first tempered with a preheat coil.
• Do not place the Ultra-sorb panel near the entrance of a high-efficiency
filter. The filter will remove visible moisture and become waterlogged.
See the Caution “Installing Ultra-sorb upstream from filter media” on Page
28.
• Do not place the Ultra-sorb panel where discharged visible mist will
impinge directly on a metal surface.
PLACEMENT IN AN AIR HANDLING UNIT (FIGURE 6-1)
• Location A is the best choice. Installing downstream of heating and cooling
coils provides the most even flow through the dispersion unit; plus, the
heated air provides an environment for best absorption.
• Location B is the second-best choice. However, in change-over periods, the
cooling coil will eliminate some moisture for humidification.
• Location C is the third-best choice. Air leaving a fan is usually very turbulent
and can cause vapor to not absorb at the expected non-wetting distance.
Allow for more distance if installing downstream of a fan.
• Location D is the poorest choice. The cooler air at this location requires an
increased non-wetting distance.
Selecting the location
INSTALLATION
DETERMINE STEAM DISPERSION PANEL PLACEMENT
Dispersed steam must be absorbed into the airflow before it comes in
contact with duct elbows, fans, vanes, filters, or any object that can cause
condensation and dripping.

8ULTRA-SORB MODEL XV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Mounting and support
Elbow Duct
Airflow
Airflow
Ultra-sorb
Ultra-sorb
Duct split
Non-wetting
distance
OM-178
INSTALLATION
Ultra-sorb
Airflow
Drip pan
Ceiling line
Vapor absorption
area
* This length of duct should have sealed seams
and should be at least three times the height
of the Ultra-sorb panel.
OM-198
2" (50 mm)
OM-197
Cold
air
flow
Ultra-sorb
Extended trails of
fog may develop
High limit duct humidistat 10' to 15'
(3 to 4.5 m) downstream from Ultra-sorb
mc_101410_0955
mc_052411_0830
INSTALLATION IN A COLD AIR STREAM
When a steam dispersion panel is installed in a duct that will carry cold air,
determine the dew point temperature. If the psychrometric chart reveals that
saturation may occur, protection should be provided. A high-limit humidistat or
thermostat set to cut off the steam dispersion panel at a safe temperature can
be used for this purpose. See Figure 8-1.
PLACEMENT UPSTREAM FROM AN ELBOW OR DUCT SPLIT
Due to Ultra-sorb's rapid steam absorption performance, installation upstream
from elbows or duct splits can be done with confidence. See Figure 8-2.
INSTALLATION ABOVE VALUABLE EQUIPMENT
Water piping and humidifiers should not be installed above expensive
equipment. A condensing or leaking water pipe or other accidental water
spillage could cause serious damage to the equipment below. When such
an installation cannot be avoided, install a galvanized drip pan under the
humidifier piping, valve, etc. to catch and drain away unintended water. See
Figure 8-3.
See also “Optional header overflow P-trap water seal” on Page 17.
PANEL SUPPORT
The duct or air handler section and Ultra-sorb panel must be properly
supported to carry the weight of the assembly. The weight of the piping must
be supported by the building structure rather than by the Ultra-sorb unit.
Otherwise, the weight may impose stress on the connections, causing them to
fracture and leak.
mc_071311_1540
Pipe to drain size as required
FIGURE 8-1:
INSTALLATION IN A COLD AIR STREAM
FIGURE 8-2: UPSTREAM PLACEMENT
FIGURE 8-3:
INSTALLATION ABOVE VALUABLE
EQUIPMENT

9
ULTRA-SORB MODEL XV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Mounting and support
Dispersion tube orientation
Verify that the steam discharge tubelets are
perpendicular to the airstream (see Figure
9-1). The spring-loaded dispersion tubes
easily rotate for proper orientation.
Airflow
Tubelet Dispersion tube
Airflow OM-150a
Duct smoke detector
Do not install a duct smoke detector
downstream from the Ultra-sorb panel. If
downstream installation is required, install it far
enough from the Ultra-sorb panel to avoid false
alarms.
OM-7482
Top outside corners
Four inside corners
Perimeter of top frame along duct flange
Both sides of cover seam
mc_101410_0845
INSTALLATION
Where allowed, screws and drill bits must not penetrate more than 3/4" (20
mm) into the header assembly. See Figure 10-1 for allowable drill and
screw locations.
Ultra-sorb Model XV must be installed in horizontal airflows only.
MOUNTING IN A DUCT
Mounting flanges on both sides of the unit and the header and frame can be
used as mounting surfaces (see Figure 10-1). A matching flange or metal frame
is required on the ductwork for connection to the Ultra-sorb flanges. Use a #12
self-drilling and tapping screw 3/4" (20 mm) long, spacing not to exceed 12"
(305 mm). If an angle-iron frame is provided on the duct section, a longer
screw may be required.
MOUNTING IN AN AIR HANDLER
Metal support frames should be anchored to the air handler casing. When
mounting the Ultra-sorb to a metal support frame, use 1/4 - 20 nuts and bolts
or #12 self drilling and tapping screws. Fastener spacing should not exceed
6" (150 mm).
Ultra-sorb panels that penetrate a duct section
must be sealed with HVAC caulking or a similar
weather sealant to prevent air leakage. Panels
should be sealed at locations shown.
FIGURE 9-2: PREVENTING DUCT AIR LEAKS
FIGURE 9-1:
DISPERSION TUBE ORIENTATION

10 ULTRA-SORB MODEL XV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Installation drawings:
INSTALLATION
OM-7490
Attach duct flange to top frame assembly
1/2"
(13 mm)
Attach duct flanges to 1.5" (38 mm) mounting flanges
Attach duct flange
to header assembly
Screws OK
3/4" (20 mm) max length (See Note 7)
Screws OK
No screws
Notes:
1. See Figure 12-1 for trap clearance.
2. Steam supply line to unit and piping are not included.
3. Dispersion tubes are available on 3", 4", 6", 9" and 12" (76, 102, 152, 229, and 305 mm) centers.
4. Ultra-sorb steam dispersion panels will be assembled, crated, and shipped intact in all sizes up to 98" (2490 mm) overall height. Any Ultra-sorb
can be shipped unassembled by request, requiring field assembly.
5. Standard sizes are 12" x 12" up to 144" x 144" in 1" increments (305 x 305 mm up to 3660 x 3660 mm in 25 mm increments). Larger sizes are
available.
6. Install the panel level. If slope cannot be avoided, ensure that the slope is toward the drain end of the panel.
7. Drill or screw through the header assembly only where shown.
Screws and drill bits must not penetrate more than 3/4" (20 mm) into the header assembly. Use 1/4–20 nuts and bolts or #12 self drilling and
tapping screws for mounting the Ultra-sorb to a metal support frame.
No screws through bottom
of header assembly
No screws
through top
of header
assembly
No screws
through end of
header assembly
No screws through
end of header
assembly
Screws OK
Screws OK
mc_101310_1030
Mounting in a duct
FIGURE 10-1: ULTRA-SORB MODEL XV IN A DUCT (HORIZONTAL AIRFLOW ONLY)
1/2" (13 mm)
Connection end
of header
Humidification steam
inlet:
• 1" or 2" NPT
(DN25 or DN50),
determined by
maximum steam
capacity
• 3" (DN80) flange,
STS humidifier
connection only
Pressurized boiler
steam inlet
(3/4" NPT, internal
thread)
Pressurized condensate outlet
(3/4" NPT, internal thread)
Float switch, optional header overflow/
access port (1/2" NPT, internal thread)
Add center support required for all units
greater than 60" (1524 mm) wide.

11
ULTRA-SORB MODEL XV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Notes:
1. Dashed lines indicate provided by installer.
2. See Figures 12-1 and 12-2 for trap clearance alternatives.
3. Steam supply line to unit and piping are not included.
4. Dispersion tubes are available on 3", 4", 6", 9" and 12" (76, 102 152, 229, and 305 mm)
centers.
5. Ultra-sorb steam dispersion panels will be assembled, crated, and shipped intact in all sizes
up to 98" (2490 mm) overall height. Any Ultra-sorb can be shipped unassembled by request,
requiring field assembly.
6. Standard sizes are 12" x 12" up to 144" x 144" in 1" increments (305 x 305 mm up to 3660
x 3660 mm in 25 mm increments).
Larger sizes are available.
7. Heat exchanger requires 5 psig (35 kPa) minimum steam pressure.
Mounting in an air handling unit
• Metal support frames should be anchored to the air handler casing.
• Drill or screw through the header assembly only where shown in Figure 10-1. Screws and drill
bits must not penetrate more than 3/4" (20 mm) into the header assembly.
• Use 1/4–20 nuts and bolts or #12 self drilling and tapping screws.
• Fastener spacing should not to exceed 6" (150 mm).
• When Ultra-sorb Model XV is installed in bypass air applications provide additional bracing for
the unsupported side(s).
• Install the panel level. If slope cannot be avoided, ensure that the slope is toward the drain end
of the panel.
Connection end
of header
Humidification steam
inlet:
• 1" or 2" NPT
(DN25 or DN50),
determined by
maximum steam
capacity
• 3" (DN80) flange,
STS humidifier
connection only
Pressurized boiler steam inlet
(3/4" NPT, internal thread)
Pressurized condensate outlet
(3/4" NPT, internal thread)
Float switch, optional header overflow/
access port (1/2" NPT, internal thread)
Tubelets perpendicular to airflow
Humidification steam to header
AHU wall
Pressurized
condensate out to
return main
Steam from pressurized steam
source to heat exchanger
Header
CAUTION
Use a backup wrench
Use a backup wrench on all
plumbing connections. Failure to
use a backup wrench could cause
damage to the Ultra-sorb Model XV.
INSTALLATION
Mounting in an air handlerInstallation drawings:
FIGURE 11-1: ULTRA-SORB MODEL XV IN AN AIR HANDLER (HORIZONTAL AIRFLOW ONLY)
OM-7657a
Coil
height
AHU
height
Coil width
AHU width
Add center support required for all units
greater than 60" (1524 mm) wide.

12 ULTRA-SORB MODEL XV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Recommendations and steam inlets
6" (152 mm) Steam trap clearance
OM-7655
Note: Dashed lines indicate provided by
installer.
RECOMMENDATIONS
Trapping - steam supply and pressurized condensate return
• Low pressure, up to 15 psi (103 kPa) — float and thermostatic (steam)
trap (Figure 12-1)
• High pressure, more than 15 psi (103 kPa) — inverted bucket trap
(Figure 12-2)
• Lifting condensate — Steam trap (up to 15 psi/103 kPa) or inverted
bucket trap (Figure 12-3)
Driest steam
To ensure driest steam, take humidifier steam off the top of the steam main
(not the side or bottom).
Airflow proving switch
Use an airflow proving switch to prevent humidification steam from entering
the header if air is not moving in the duct.
High limit humidistat
To prevent over saturation use a high limit (duct mounted) humidistat (Figure
6-1). Mount it 10' to 15' (3 to 4.5 m) downstream from the Ultra-sorb
panel, and set it at 80 to 90% RH.
HEAT EXCHANGER PRESSURIZED BOILER STEAM INLET (SEE FIGURE 11-1)
Steam pressure for steam entering the heat exchanger must be least 5 psig
(35 kPa) to vaporize condensate in the header.
INSTALLATION
2-position
shutoff control
valve
Elevated condensate
return main
Inlet
strainer
Steam trap
Check valve
(by others)
Modulating
control valve
Ultra-sorb XV steam
dispersion panel
Integral heat exchanger
• Ultra-sorb Model XV employs an integral
heat exchanger to pressurize and lift
condensate up to 12" per psi (300 mm
per 6.9 kPa) of steam pressure.
• Steam pressure entering the heat exchanger
must be at least 5 psig (35 kPa).
• Condensate may be piped to the condensate
return main.
FIGURE 12-2: LIFTING CONDENSATE WITH ULTRA-SORB MODEL XV
FIGURE 12-1: ULTRA-SORB MODEL XV
STEAM TRAP DIMENSIONS
OM-7879

13
ULTRA-SORB MODEL XV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Controls
CONTROL OPTIONS
CONFIRMING STEAM DISPERSION PANEL CONFIGURATION
The Ultra-sorb XV steam dispersion panel utilizes a built-in heat exchanger to
evaporate condensate generated in the humidification process. For maximum
energy efficiency, this requires a unique control sequence that operates a
2-position shutoff valve for the heat exchanger, in addition to a modulating
valve for humidification control. A float switch in the steam dispersion panel
header, along with control sequence timings assure effective condensate
management along with humidification output based on demand.
Control options are described in Table 16-1.
CONTROL OPTION #1 - DRISTEEM CONTROL CABINET
The Ultra-sorb XV dispersion panel is provided with controls by DriSteem.
Operation of both the 2-position shutoff valve, and modulating control valve
is coordinated by the electronic controller provided in the DriSteem control
cabinet. A demand signal or space RH is sent to the DriSteem controller, and
the controller opens/closes the two steam valves based on the signal and
inputs including the steam dispersion panel float switch, and (optionally) a duct
air flow switch and humidity high limit control.
Note: The Ultra-sorb XV control cabinet utilizes the same control board as other
DriSteem products, when configured as a Vapor-logic controller. The Ultra-sorb
XV application firmware is different from Vapor-logic control. Board wiring
terminal connections do not have the same functions as used for the Vapor-
logic controller. Please refer to the wiring diagram included with the unit for
proper wiring. Field configuration of the Ultra-sorb XV board is as described
in the following paragraphs. Adjust the Vapor-logic control signals and setting
from the Vapor-logic keypad interface or web server. Refer to the Vapor-logic
IOM for further details.
INSTALLATION
Important:
Failure to follow these wiring procedures can
result in erratic operation or failure.
This product has been tested at the factory for
proper operation. Product failures resulting from
faulty handling, incorrect wiring, or shorting of
wires together on external components are not
covered under your DriSteem warranty. Review
information and diagrams before proceeding.
WARNING
Electric shock hazard
Only qualified electrical personnel
should perform field wiring installation
procedures. Improper wiring or contact
with energized circuits can cause
property damage, severe personal
injury, or death as a result of electric
shock and/or fire.
Do not open control cabinet or
subpanel access panels until electrical
power is disconnected.
CAUTION
Damage from debris
When drilling penetrations in the
control cabinet, protect all internal
components from debris, and vacuum
out the control cabinet when finished.
Failure to comply with this directive
can damage sensitive electronic
components, cause erratic operation
or failure, and void your DriSteem
warranty.

14 ULTRA-SORB MODEL XV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
FLOAT SWITCH
Wire the float switch to the DriSteem control cabinet. A wiring diagram is
included with the unit.
Under normal conditions the float switch in the Ultra-sorb Model XV header
is closed, and the modulating steam valve or STS humidifier operates
according to the humidification control system’s call for humidity. In the
event condensate levels rise in the humidifier header, the float switch rises
and the circuit opens, activating a condensate mitigation sequence. Refer
to the sequence of operation on page 33.
If you suspect problems with the float switch operation, see float switch
maintenance instructions on Page 31. These instructions must be
followed for the float switch to function properly.
AIR FLOW SWITCH
Air flow indication is required. Indication can be provided by a BAS input
or air flow switch wired to the DriSteem control cabinet. Wire the air flow
switch to the DriSteem control cabinet as shown in the diagram included
with the unit. The steam dispersion panel will not run if the air flow switch
input of the DriSteem controller is left open. A circuit-closing jumper is
provided on the controller board input and must be removed to the air flow
input.
HIGH LIMIT HUMIDISTAT
Wire the duct high limit humidistat to the DriSteem control cabinet. Refer to
the Vapor-logic external connections diagram or the Vapor-logic IOM for
wiring instructions.
Controls
INSTALLATION

15
ULTRA-SORB MODEL XV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
CONTROL OPTION #2 – ELECTRIC TEMPERATURE SWITCH ONLY; CONTINUOUS HEAT
EXCHANGER OPERATION
The DriSteem control cabinet is not provided. An electric modulating control
valve is controlled by a 2-10 VDC/4-20 mA signal from a control system (BAS)
or modulating humidistat. Optional air flow switch, high limit humidistat are
wired in series with 24 VAC control circuit of the modulating control valve. See
the wiring diagrams provided with the unit.
ELECTRIC TEMPERATURE SWITCH
Install the temperature switch (Figure 20-1) to prevent the header
from flooding with condensate if the heat exchanger cools, such as if
the condensate return main becomes flooded or the trap fails closed.
DriSteem's temperature switch is a temperature-actuated make-break
switch. The temperature at which it switches is adjustable and should be
set at 210 °F (99 °C).
• Install the sensing element of the temperature switch in the condensate
return piping between the Ultra-sorb heat exchanger outlet and the
inlet to the steam trap, as shown in Figure 20-1. Include a tee with
a 1/2" (DN15) pipe thread opening to receive the sensing element.
When steam surrounds the sensing element, the switch will “make,”
allowing the steam dispersion panel valve to open.
• Install all wiring according to national and local electrical codes, and
size transformer VA to load VA.
• When using a temperature switch to control the on-off heat exchanger
valve, follow the wiring instructions supplied with the modulating
humidification-steam control valve.
CONTROL OPTION #3 – PNEUMATIC TEMPERATURE SWITCH ONLY; CONTINUOUS
HEAT EXCHANGER OPERATION
The DriSteem control cabinet is not provided. A pneumatic modulating control
valve is sent a 3-15 PSI signal from a pneumatic humidistat or other pneumatic
device, to modulate the valve based on humidity demand.
• The 2-position shutoff valve is not used. Steam supply to the panel’s
internal heat exchanger is continuous.
PNEUMATIC TEMPERATURE SWITCH
Install the pneumatic temperature switch as shown in (Figure 20-2). The
temperature switch will prevent the header from flooding with condensate
by closing the modulating steam valve if the heat exchanger cools (if
the condensate return main becomes flooded or the trap fails closed).
DriSteem's pneumatic temperature switch is a temperature-actuated open-
closed pneumatic switch. The pneumatic signal (3-15 PSI) is maintained
above 210°F (99°C) and is opened (bled off) below 200°F (93°C).
Controls
INSTALLATION

16 ULTRA-SORB MODEL XV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Controls
INSTALLATION
CONTROL OPTION #4 – CONTROLS BY BAS/CONTROLS CONTRACTOR
The BAS or controls contractor will provide the necessary controller and
programming logic to sequence the steam dispersion panel valves as
described for Control Option #1. This includes providing control outputs for the
modulating control valve and 2-position shutoff valve. Refer to the BAS controls
contractor wiring diagrams for specific valve and float switch connection
terminals.
Table 16-1:
Boiler steam application control options
Heat exchanger and humidifier
control option
2-position shutoff
valve
Modulating control
valve Float switch in header Temperature switch at condensate outlet
DriSteem control
cabinet
Control Cabinet with time delay
(#1)
Coordinated Heat exchanger and
humidification control through
DriSteem control cabinet.
Electric - Wired to
DriSteem control
cabinet
Electric - Wired to
DriSteem control
cabinet
Yes - Wired to control
cabinet
No
(optional) Yes
Temperature switch only
(Electric)
(#2)
The heat exchanger operates
continuously (100%). Electric
temperature switch opens, shutting
off the power to the modulating
valve if the condensate backs up in
the heat exchanger (failed trap).
Not Used Electric No Yes- Electric No
Temperature switch only
(Pneumatic)
(#3)
The heat exchanger operates
continuously (100%). Pneumatic
temperature switch opens, closing
the modulating valve if the
condensate backs up in the heat
exchanger (failed trap).
Not Used Pneumatic No Yes - Pneumatic No
BAS Control
(#4)
Controls by BAS/controls
contractor; Contractor to provide
and follow control sequence of
Control Option #1
Electric - Wired to
BAS controller
Electric - Wired to
BAS controller
Yes - Wired to BAS
controller
No
(optional) No
Control by STS®humidifier
(#5)
Control by STS humidifier
Optional if chosen
with Ultra-sorb XV
Chosen for inlet
to STS - Electic or
Pneumatic
Yes - Wired to STS
humidifier
Vapor-logic®
controller
Optional if chosen
with Ultra-sorb XV
No - Control provided
by STS humidifier

17
ULTRA-SORB MODEL XV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Controls
INSTALLATION
Note: After the water seal, run a 1½" (DN40)
drain line to an open drain with a 1"
(25 mm) air gap. Water seal must
cover height of internal heat exchanger
tube as shown to provide condensate
evaporation in normal operating
conditions.
OM-7493
Connect optional P-trap
overflow water seal if
float switch is not used.
Connection end of header
1.25" (32 mm) rise
OM-7
OM-7
493
493
10.75" (273 mm)
Fill cap
FIGURE 17-2: ULTRA-SORB MODEL XV
OPTIONAL HEADER OVERFLOW P-TRAP
WATER SEAL
12" (305 mm) seal
12" (305 mm)
12" (305 mm)
6" (152 mm)
OM-7533
Notes:
• Electrical power requirements: 120 VAC,
1.0 Amps, or 230 VAC, 0.5 Amps
• Components are 24 VAC, powered by
a transformer in the control cabinet. 50
VA available from internal transformer for
operation of two 24 VAC control valves.
• Maximum distance from control cabinet to
Ultra-sorb Model XV is 50’ (15 m).
FIGURE 17-1: ULTRA-SORB MODEL XV
CONTROL CABINET
ULTRA-SORB XV WITH DRISTEEM STEAM-TO-STEAM (STS) HUMIDIFIER
If the Ultra-sorb XV panel is used in conjunction with a DriSteem Steam-to-
Steam (STS) humidifier, atmospheric steam generated from the STS is piped
to the Ultra-sorb XV and distributed through the dispersion header to the
humidifier tubes.
Pressurized boiler steam (5 PSI minimum), as used to source the STS unit heat
exchanger, is also used to operate the Ultra-sorb XV internal heat exchanger
enabling condensate evaporation in the humidifier panel header. See Figure
5-1 for piping connections.
Optional Ultra-sorb XV control devices are located as shown in Figure
5-1 and wired to the Vapor-logic controller provided with the associated
STS humidifier. Devices may include a 2-position solenoid valve for XV heat
exchanger control, and float or temperature switch(es).
• Refer to the wiring diagram provided with the STS unit for wiring
connections.
OPTIONAL HEADER OVERFLOW P-TRAP WATER SEAL
Ultra-sorb Model XV is designed to vaporize the condensate generated in a
properly designed, installed, operated, and maintained system. An optional,
header overflow p-trap (Figure 17-2) is recommended if any of the following
are true:
• There is not a float switch installed in the dispersion panel header.
• Boiler chemicals are causing heavy material deposition on heat exchanger.
Before operating the Ultra-sorb, and after extended shutdown periods, prime
the P-trap with about 1 cup (200 mL) of water. A water seal cannot be assured
via condensate generated within the humidifier header. Do not feed the P-trap
with a water source to maintain prime, as this will force water into the header.

18 ULTRA-SORB MODEL XV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Controls
INSTALLATION
FIGURE 18-1: CONTROL CABINET
OM-7882
Wiring
terminal
block
120/208/240/480V to 24 VAC transformer, 75 VAC
Controller board
Status LED