DriSteem XT Series, XTP 002, XTP 003, XTP 006, XTP 010 Installation, Operation And Maintenance Manual

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READ AND SAVE THESE INSTRUCTIONS

XT SERIES

Electrode Steam Humidifiers

Installation, Operation, and Maintenance Manual

Page 2

Warnings and cautions

WARNINGS AND CAUTIONS

WARNING

Indicates a hazardous situation that could result in death or serious injury if instructions are not followed.

CAUTION

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 qualiﬁ ed HVAC and electrical contractors. Installation must be code approved. Improper installation can cause property damage, severe personal injury, or death as a result of electric shock, burns, or ﬁ re.

DriSteem

Europe: +3211823595

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 humidiﬁ cation system has extremely hot surfaces. Water in steam cylinders, steam tubing, 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.

Technical Support: North America: 800-328-4447

Disconnect electrical power

Disconnect electrical power before installing supply wiring or performing service or maintenance procedures on any part of the humidiﬁ cation system. Failure to disconnect electrical power could result in ﬁ re, 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 ﬁ re. Do not remove cabinet doors until electrical power is disconnected.

Follow the shutdown procedure on Page 49 before performing service or maintenance procedures on any part of the system.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

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Warnings and cautions

WARNING

Electrical shock hazard

If the humidiﬁ er starts up responding to a call for humidity during maintenance, severe personal injury or death from electrical shock could occur. To prevent such start-up, follow the shutdown procedure on Page 49.

CAUTION

Follow steam piping recommendations

Controlling condensate ﬂ ow and collection in an XT Series humidiﬁ er system is critical to maximize performance. Failure to follow the steam piping recommendations in this manual can cause system pressure ﬂ uctuations and increase cylinder pressure, steam velocity, and condensate noise.

Hot discharge water

Discharge water can be as hot as 212 °F (100 °C) and can damage some drain plumbing materials not rated for hot drain water. To prevent such damage, make sure drain water tempering is selected, and supply water is not heated. Do not shut off supply water to the cylinder before it is drained.

Excessive supply water pressure

Supply water pressure greater than 80 psi (550 kPa) can cause the humidiﬁ er to overﬂ ow.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

iii

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Table of contents

ATTENTION INSTALLER

Original Instructions

Read this manual before installing. Leave manual with product owner.

DriSteem Technical Support 800-328-4447

Website:

Documents can be viewed, printed or ordered from our website, www.dristeem.com.

DriCalc sizing and selection software:

DriCalc

is our humidiﬁ cation system sizing and selection software, which can be accessed from dristeem.com.

WARNINGS AND CAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii

PRODUCT OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Capacities, line currents, and fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Dimensional drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Dimensions and weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Dispersion options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Selecting a location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Fill cup extension kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Steam cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Piping: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Supply water and drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Field piping overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

XT steam blowers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Humidifier wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Sensor placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Dispersion: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Selecting the dispersion assembly location . . . . . . . . . . . . . . . . . . . 20

Returning condensate to steam cylinder . . . . . . . . . . . . . . . . . . . . . 22

Steam outlet connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Steam outlet connections with hose . . . . . . . . . . . . . . . . . . . . . . . . 24

Single dispersion tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Drip tee installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Connecting to humidifier with tubing . . . . . . . . . . . . . . . . . . . . . . . 32

Rapid-sorb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

XT steam blowers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Principle of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

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Table of contents

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Start-up checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Model XTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Shutdown and cool-down procedures . . . . . . . . . . . . . . . . . . . . . . . . . 49

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Replacing steam cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Drain valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Replacement parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

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Product overview

PRODUCT OVERVIEW

DriSteem XT Series electrode steam humidiﬁ ers use heat caused by electrical resistance in their ﬁ ll water to boil the ﬁ ll water into humidiﬁ cation steam. Steam output and water conductivity are managed via automatic draining and ﬁ lling. See Figure 2-1.

FIGURE 2-1: XT SERIES HUMIDIFIER COMPONENTS

Steam to duct or XT steam blower (see dispersion options on Page 8)

Control panel for on-board controller (see Figure 3-1)

Fill cup

High water sensor

Steam cylinder

Overﬂ ow hose

Electrodes

Electrical resistance in ﬁ ll water

OM-7661_aa

Download DriSteem literature

DriSteem product manuals can be downloaded, printed, and ordered from our website: www.dristeem.com

The Vapor-logic Installation and Operation Manual ships with Model XTP humidiﬁ ers. It is a comprehensive manual. Refer to it for information about the keypad/display and Web interface, and for troubleshooting information.

Cylinder drain

Fill hose

Supply water connection

Note: See detailed installation drawing on Page 14 and principle of operation on Page 45.

Overﬂ ow to drain

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

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Product overview

SUPPLY WATER

There are beneﬁ ts and trade-offs to consider when the application allows a choice between hard and softened water:

Hard water: The beneﬁ t of hard water is less frequent draining and ﬁ lling

than with softened water, which results in better energy and water efﬁ ciency and more consistent steam output. However, cylinder replacement could be more frequent with hard water, because hard water scale coats the electrodes. The harder the water, the more frequent the need for a new cylinder.

Softened water may be used in the XT series electrode humidiﬁ er. However,

softened water ions stay in solution to much higher concentrations than hard water ions. The result can be more frequent draining and ﬁ lling, which results in less energy and water efﬁ ciency, and less consistent steam output. While softened water can reduce scale build-up in the cylinder, it can also shorten cylinder electrode life.

CONTROLLER

The Model XTP humidiﬁ er Vapor-logic® controller features menus for all humidiﬁ er functions, with a Web interface for access to all functions via Ethernet. See "Operations" beginning on page 45 for details.

FIGURE 3-1: XT SERIES HUMIDIFIER CONTROL PANEL

Table 3-1: DriSteem supply water guidelines for

XT series electrode humidifiers

Supply water conductivity

Chlorides Not limited

pH 6.5 to 8.5

Silica < 15 ppm

Demineralized, deionized, and reverseosmosis water cannot be used.

Supply water outside of these guidelines may void your DriSteem warranty. Please contact your DriSteem Representative or DriSteem Technical Support if you need advice.

350 to 1250 μS/cm (roughly comparable to water hardness of 10 to 36 grains per gallon).

XTP Vapor-logic keypad/display

Status display and

menu selection

Softkeys for direct

menu access

Navigation buttons

for item selection

Controller on-off switch*

* On-off switch for control board — not a safety shut-off to humidiﬁ er power wiring.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

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SPECIFICATIONS

Capacities, line currents, and fusing

Table 4-1: Line currents and recommended fusing for XT Series humidifiers

Model Nominal steam capacity

XTP lbs/hr kg/h

002 5 2 1.7 1

003 10 5 3.3

006 18 8 6.0

010 30 14 10.0 3

017 50 22 16.5 3

025 75 34 25.0 3

033 100 45 33.3 3

042 125 57 41.7 3

048 143 65 47.8 3

050* 150 68 50.0 3

067* 198 90 66.7 3

083* 250 113 83.3 3

096* 287 130 95.7 3

* These models have two steam cylinders and require independent service connections.

kW Phase Volts Maximum line current (amps) Recommended fusing (amps)

120 17 25 208 10 15 230 8 15 240 8 15 208 19 25 230 17 25

240 17 25 277 14 20 400 10 13 480 8 15 600 7 10 208 11 15 240 10 15 400 6 10 480 5 10 600 4 10 208 35 45 230 31 40 240 30 40 277 26 35 400 18 25 480 15 20 600 12 15 208 20 25 240 17 25 400 10 13 480 9 15 600 7 10 208 33 45 240 29 40 400 17 25 480 14 20 600 12 15 208 55 70 240 48 60 400 29 40 480 24 35 600 19 25 400 43 63 480 36 50 600 29 40 400 58 80 480 48 70 600 39 50 400 72 100 480 60 80 600 48 70 400 80 100 480 69 90 600 55 70 400 2 x 43 2 x 63 480 2 x 36 2 x 50 600 2 x 29 2 x 40 400 2 x 58 2 x 80 480 2 x 48 2 x 70 600 2 x 39 2 x 50 400 2 x 72 2 x 100 480 2 x 60 2 x 80 600 2 x 48 2 x 70 400 2 x 80 2 x 100 480 2 x 69 2 x 90 600 2 x 55 2 x 70

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

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Dimensional drawings

FIGURE 5-1: XT SERIES HUMIDIFIER DIMENSIONAL DRAWINGS

SPECIFICATIONS

Top

Front

Bottom

Models XTP 002 through 048

Electrical knockout

Fill cup extension kit*

10.0 (254)

Drain outlet

Supply water connection

Dispersion outlet

Electrical knockout

Electrical knockouts

OM-7672

Top

Front

10.0 (254)

Bottom

Supply water connections

Models XTP 050 through 096

21.0 (533)

Dispersion outlets

Fill cup extension kits*

15.1 (384)

Electrical knockouts

Notes: * Fill cup extension (Figure 5-1) is required for the following:

- All XT Series humidiﬁ ers using Ultra-sorb or Rapid-sorb

- When developed length of steam tubing is more than 20' (6 m) and duct static pressure exceeds 2" wc (498 Pa)

• Labeled dimensions: inches (millimeters).

• See mounting dimensions in Figure 9-1.

OM-7673

21.0 (533)

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Drain outlets

Page 10

SPECIFICATIONS

Dimensions and weights

Table 6-1: XT Series humidifier dimensions by model number

Model XTP

Dimension Description

A Cabinet width 14.6 370 17.7 450 19.9 504 39.6 1005

B Cabinet height 20.6 523 24.1 612 25.6 650 25.6 650

C Cabinet depth 8.7 221 11.8 300 13.4 340 13.4 340

Cabinet back edge to steam/drain outlet

centers

E Cabinet left edge to steam/drain outlet centers 4.4 112 6.0 152 7.0 178 7.0 178

Cabinet back edge to supply water connection

center

Cabinet left edge to supply water connection

center

002, 003, 006 010, 017 025, 033, 042, 048 050, 067, 083, 096

inches mm inches mm inches mm inches mm

4.5 114 6.0 152 6.7 170 6.7 170

6.7 170 9.5 241 11.1 282 11.1 282

1.0 25 1.0 25 1.1 28 1.1 28

Table 6-2: XT Series humidifier weights by model number

Model XTP

002, 003 006 010, 017 025, 033, 042, 048 050, 067, 083, 096

lbs kg lbs kg lbs kg lbs kg lbs kg

Shipping weight 37 17 37 17 50 23 64 29 139 63

Maximum operating weight 38 17 46 21 79 36 115 52 219 99

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

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Dispersion options

SPECIFICATIONS

The duct dispersion options in Figure 7-1 and the open space dispersion options in Figure 7-2 are available for XT Series humidiﬁ ers. For installation details, see “Dispersion” beginning on Page 20.

FIGURE 7-1: XT SERIES HUMIDIFIER DUCT DISPERSION OPTIONS

Ultra-sorb

OM-7667

FIGURE 7-2: XT STEAM BLOWERS

Mounted on top of humidiﬁ er

OM-7670

Mounted up to 10' (3 m) away from humidiﬁ er

Rapid-sorb

Single dispersion tube

OM-7668

OM-7698

OM-7669

Notes:

• Models XTP 010 and larger require condensate drain. See Page 32.

• XT steam blowers (SDU) shipped with fuses to be installed in connected XT series humidiﬁ ers.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

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INSTALLATION

Selecting a location

HUMIDIFIER

When selecting a location for the humidiﬁ er, consider the following:

• Proximity to the duct

Install the humidiﬁ er near the air duct system where the dispersion assembly

will be located. The maximum recommended length for steam hose connecting a single humidiﬁ er to a dispersion assembly is 10' (3 m). The maximum recommended developed length for tubing connecting a single humidiﬁ er to a dispersion assembly is 20' (6 m).

For more information about installing dispersion assemblies, see

“Dispersion” beginning on Page 20.

• Elevation of the installed dispersion assembly

The recommended installation location for the dispersion assembly is at an

elevation higher than the humidiﬁ er. However, if the dispersion assembly must be installed at an elevation lower than the humidiﬁ er, install a drip tee and drain. See “Drip tee installation” on Page 29.

Before installing a dispersion assembly or interconnecting piping, review all

pitch requirements in the “Dispersion” section of this manual.

• Temperature and relative humidity (RH):

Install humidiﬁ er only in locations that meet the following temperature and

RH requirements:

- Maximum ambient temperature: 104 °F (40 °C)

- Minimum ambient temperature: 41 °F (5 °C)

- Maximum ambient humidity: 80% RH (non-condensing)

Staging multiple humidifiers

Up to four Model XTP humidiﬁ ers can be staged to operate in sequence. In a sequenced application, one control input signal is divided into user-selectable control input signals for the connected humidiﬁ ers. See the Vapor-logic In stal la tion and Op er a tion Man u al for instructions on staging multiple humidiﬁ ers.

FIGURE 8-1: XT SERIES HUMIDIFIER RECOMMENDED MINIMUM CLEARANCES

36" (914 mm) front clearance

16"

(400 mm)

(76 mm)

15" (380 mm)

3" (76 mm) between units

OM-7664

• Required clearances (see Figure 8-1)

• Electrical connections

Electrical power supply connections are at the lower or upper right rear

corner of the unit. See “Humidiﬁ er wiring” on Pages 17 and 18.

• Supply water and drain piping connections

Water supply piping and drain connections are at the bottom of the

cabinet. See “Piping” on Page 13.

• Exterior wall insulation

Install the humidiﬁ er on an exterior wall only if the wall is properly

insulated.

DISPERSION CONTROL DEVICES

See page 20 for recommended installation locations for the dispersion assembly and associated control devices.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

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Mounting

FIGURE 9-1: XT SERIES HUMIDIFIER MOUNTING KEYHOLE LOCATIONS

INSTALLATION

Models XTP 002 through 048

0.390" x 0.719"

(9.9 x 18.3 mm) dia. keyholes

0.390" (9.9 mm)

dia. holes

OM-7969

Table 9-1: XT Series humidifier mounting keyhole dimensions

Dimension

A 3.9 100 7.1 180 7.5 190 14.0 356

002, 003, 006 010, 017 025, 033, 042, 048 050, 067, 083, 096

inches mm inches mm inches mm inches mm

0.390" x 0.719" (9.9 x 18.3 mm) dia. keyholes

0.390" (9.9 mm) dia. holes

Model XTP

Models XTP 050 through 096

OM-7970

B 3.0 75 3.6 92 3.4 86 3.3 84

C 3.2 81 4.4 112 4.1 104 4.1 104

D 14.0 355 16.3 414 18.9 480 18.9 480

E ——————19.0 483

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

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INSTALLATION

Mounting

Unpack the humidiﬁ er from the shipping carton, and remove the cabinet doors and steam cylinder (see removing steam cylinder instructions below).

WARNING

Note: When ﬁ rst unpacking the humidiﬁ er, cut and remove the shipping strap

that goes around the cylinder and through the cylinder guides. This strap does not need to be replaced.

REMOVING STEAM CYLINDER

If sent to this page from the “Maintenance” section, and the humidiﬁ er has been operating, make sure the cylinder is empty and cooled before removing it. See the shutdown and cool-down procedures on Page 49.

1. Carefully pull the electrode plugs straight up off the cylinder to ensure no damage to the plug boot occurs.

2. Disconnect the high water sensor wire.

3. Place hands palms-down below cylinder on both sides of drain outlet.

4. Press up against bottom of cylinder with backs of hands while pressing down against cabinet floor with fingers.

5. Raise cylinder until drain outlet clears drain valve body and the side tabs on the cylinder have cleared the cylinder guides. Remove cylinder from cabinet.

WALL MOUNTING HUMIDIFIER

Mount the humidiﬁ er level and plumb using the lag bolts provided. Follow the instructions below for mounting on a wood stud wall.

Mounting hazard

Mount humidiﬁ er per the instructions in this manual and to a structurally stable surface. Improper mounting of the humidiﬁ er can cause it to fall or tip, resulting in severe personal injury or death.

1. Mount spanner boards on wall, spanning at least two studs. Position one board at top of cabinet (for the lag bolts), and other board at bottom of cabinet.

2. Predrill pilot holes in spanner boards, and secure humidifier to spanner boards with lag bolts.

Note: Use the appropriate mounting methods and mounting hardware for other

wall types.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 15

Fill cup extension kit

INSTALLATION

A ﬁ ll cup extension (Figure 11-1) is required for the following:

• All XT Series humidiﬁ ers using Ultra-sorb or Rapid-sorb

• When developed length of steam tubing is more than 20' (6 m) and duct static pressure exceeds 2" wc (498 Pa)

REMOVING EXISTING FILL CUP

Remove the existing ﬁ ll cup as follows:

1. Remove steam cylinder from XT cabinet (if not already out).

2. Expand spring clamps and slide them up cylinder fill hose and supply water hose, and disconnect hoses from cylinder fill hose connection and fill valve adapter.

3. Disconnect overflow hose from overflow elbow.

4. Remove fill cup and hoses (fill cup is press fit into top of XT cabinet).

INSTALLING FILL CUP EXTENSION KIT

1. Remove steam cylinder(s) from XT cabinet (if not already out).

2. Route fill cup extension kit hoses into cabinet through fill cup hole, and fasten extension bracket as shown with two screws provided.

3. Route hoses along back of cabinet interior to provide clearance for cylinder.

FIGURE 11-1: FILL CUP EXTENSION KIT

Fill cup (see inset below)

Overﬂ ow hose (C)

Supply water hose (A)

Fill valve adapter

Cylinder ﬁ ll hose (B)

Overﬂ ow elbow

Drain cup

plate Cylinder ﬁ ll hose connection

OM-7971-XT

Fill cup

4. Cut supply water hose (small-diameter hose) (A) to length so it can attach to fill valve adapter without kinking.

5. Expand spring clamp and slide it onto supply water hose (A) far enough so it will not interfere, then push hose onto fill valve adapter. Expand and slide spring clamp into place.

6. Cut cylinder fill hose (bottom, center hose) (B) to length so it can attach to cylinder fill hose connection without kinking.

7. Expand spring clamp and slide it onto cylinder fill hose (B) far enough so it will not interfere, then push hose onto cylinder fill hose connection. Expand and slide spring clamp into place.

8. Cut overflow hose (C) to length so it can attach to overflow elbow without kinking.

9. Push overflow hose onto overflow elbow. Spring clamp is not required on this connection.

Supply water (A)

Cylinder ﬁ ll (B)

1" air gap

Overﬂ ow (C)

OM-7629

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

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INSTALLATION

Steam cylinder

INSTALLING STEAM CYLINDER

1. Make sure strainer is pressed into steam cylinder drain outlet and strainer flange is flush with bottom of cylinder outlet. See Figure 12-1.

2. Use water to lubricate drain outlet on bottom of cylinder and O-ring in drain valve body. See Figure 12-1.

Note: Because of tight clearances, perform Steps 3 through 4 only if servicing

Models XTP 002 through 017 with top-mounted steam blower. For all other models, skip to Step 5.

3. Slide steam hose that connects to cylinder and steam blower up until it is engaged on steam inlet of steam blower and tight against bottom of steam blower.

4. Slide steam outlet of new cylinder all the way up into open end of steam hose from Step 3.

5. With Warning label on cylinder facing you, lower cylinder drain outlet into drain valve body, and rotate cylinder so side tabs line up with cylinder guides inside cabinet. Push down on cylinder until drain outlet is fully seated in drain valve body.

6. Slide steam hose down so it is fully engaged on cylinder steam outlet. Re-install hose clamp(s).

FIGURE 12-1: STEAM CYLINDER INSTALLATION

High water sensor pin

OM-7632

Strainer

7. Connect high water sensor (yellow) wire to single pin surrounded by plastic shoulder on cylinder.

8. Connect electrode wires to pins on top of cylinder. Make sure all plugs fit snugly and are fully engaged on pins.

Important: Three phase cylinders have color-coded dots on the cylinder

and color bands on the electrode plugs. When connecting the plugs, match the band colors on the plugs with the dot colors on the cylinder. Refer to the wiring diagram shipped with the humidiﬁ er if necessary.

CAUTION

If cylinder plugs become loose, damage to the humidiﬁ er may occur. Obtain

replacement plugs from DriSteem. See “Replacement parts” on Pages 57 and 59 for part numbers.

Warning label

Cylinder guide

Drain valve body

OM-7972-XT

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 17

INSTALLATION

Piping:

SUPPLY WATER PIPING

Supply water and drain

Use only copper for supply water piping; do not use rubber or plastic. The standard supply water connection before the ﬁ ll valve is a 1/4" FIP.

Note: The supply water connection size is 3/8"BSP [DN10] in Europe.

In cases where water hammer may be a possibility, consider installing a shock arrestor. Water pressure must be 25 to 80 psi (175 to 550 kPa).

DRAIN PIPING

Drain piping must be code-approved, 3/4" (DN 20) ID material rated for 212 °F (100°C) minimum.

The drain cup has an integral grounding plate and requires a ﬁ eld-installed 1" (25 mm) air gap to a drain funnel to prevent conduction of electricity in the drain line.

The XT Series humidiﬁ er features user-selectable drain water tempering. When drain water tempering is selected, the humidiﬁ er tempers drain water by opening the ﬁ ll valve whenever the drain valve is energized to cool drain water before it enters the drain. Drain water tempering keeps water entering the drain line less than 140°F (60°C). Manually energizing the drain valve when the supply water is shut off can allow 212 °F (100 °C) water to enter the drain line.

Important: Thoroughly ﬂ ush supply

water piping to remove pipe residue and stagnant water before connecting piping to humidiﬁ er. Pipe residue and stagnant water in water supply piping can cause foaming, preventing humidiﬁ er from reaching required steam capacity.

WARNING

Hot drain pipes

Drain piping surface may be hot. Touching or contact with hot pipe may cause severe personal injury.

FIGURE 13-1: DRAIN PIPING DETAIL

Observe the following precautions when selecting and installing drain piping to ensure personal safety and material integrity:

• When using copper or other metallic drain piping, ground the drain piping to the earth ground lug in the XT Series humidiﬁ er.

• Chlorinated polyvinyl chloride (CPVC) piping is a non-metallic alternative for drain piping. It is rated up to 212°F (100°C) for intermittent-use, lowpressure applications.

The connection size for the steam cylinder drain is 1" (DN25) hose. Do not reduce this connection size. If drainage by gravity is not possible, use a reservoir pump rated for 212 °F (100 °C) water.

The open drain must be at least 12” (300 mm) below the bottom of the XT humidiﬁ er, to help prevent steam condensation on the humidiﬁ er. Use the 12” (300 mm) drain hose provided and position above ﬁ eld-installed open drain. Alternately, route drain line away from beneath humidiﬁ er to open drain. See Figure 13-1.

AUTOMATIC DRAIN WATER TEMPERING

XT Series humidiﬁ ers are shipped with drain water tempering set to ON for North America (OFF for Europe). To activate automatic drain water tempering see the Vapor-logic Installation and Operation Manual.

OM-7591

1" (25 mm) air gap

Open drain

3/4" (DN20) I.D.

* Ships with humidiﬁ er

• Dashed lines indicate provided by installer

• The open drain must be at least 12” (300 mm) below the bottom of the XT humidifier, to help prevent steam condensation on the humidifier.

Hose clamp*

Drain hose*

Pitch 1/8"/ft (1%) toward drain

To drain

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 18

INSTALLATION

Piping:

FIGURE 14-1: XT SERIES HUMIDIFIER FIELD PIPING OVERVIEW

Drain hose and clamp*

Fill valve with 1/4" FIP (3/8"BSP [DN10] in Europe) supply water connection

Shock arrester (by installer) recommended to reduce water hammer

Metallic water supply line

Field piping overview

Steam hose or tubing. DriSteem recommends tubing for runs longer than 10' (3 m). See Table 26-1 for maximum tubing lengths. Tubing must be grounded.

Install plumb

Pitch 1/8"/ft (1%) toward drain

1¼" (DN32) drain piping after second drain connection, or if piping run is over 10’ (3 m).

Floor drain

3/4" (DN20) drain piping up to second drain connection

1" (25 mm) air gap required to isolate unit drain piping from sanitary drain piping. Locate air gap only in spaces with adequate temperature and air movement to absorb ﬂ ash steam, or condensing on nearby surfaces could occur.

Open drains required directly below humidiﬁ er drains to prevent downstream drain line blockage from causing water to back up into cylinder. Refer to governing codes for drain pipe size and maximum discharge water temperature. Install spill funnels plumb to ﬂ oor drain.

Notes:

• Dashed lines indicate provided by installer.

• Two-cylinder model shown. * Ships with humidiﬁ er

3/8" (DN10) copper water supply line; water pressure must be 25 to 80 psi (175 to 550 kPa).

Inlet strainer, by installer

Supply valve, by installer

OM-7973

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 19

INSTALLATION

Piping:

FIGURE 15-1: PIPING FROM XT SERIES HUMIDIFIER TO REMOTE XT STEAM BLOWER

Hose clamp (provided)

Steam hose (purchased separately from DriSteem)

Hose clamp (provided)

XT steam blowers

Plastic tie

OM-7974

To open drain or humidiﬁ er ﬁ ll cup. Water seal is required, whether condensate is piped to open drain or returned to humidiﬁ er ﬁ ll cup.

Notes:

• Maximum recommended distance between humidiﬁ er and XT steam blower is 10’ (3 m).

• Models XTP 042 through 096 are not intended for use with a steam blower.

Condensate hose (purchased separately from DriSteem)

7” (178 mm) water seal

Plastic tie

Hose clamps (provided)

Steam hose (purchased separately from DriSteem)

Stainless steel Y connector*

Hose clamp*

Steam hose*

Hose clamp*

* Provided in optional connector

kit Part No. 191070-102

OM-7975

Model XTP 025 only

Plastic tie

Condensate hose (purchased separately from DriSteem)

7” (178 mm)

water seal

Plastic tie

To open drain or humidiﬁ er ﬁ ll cup. Water seal is required, whether condensate is piped to open drain or returned to humidiﬁ er ﬁ ll cup.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 20

INSTALLATION

Piping: XT steam blowers

FIGURE 16-1: PIPING FROM XT SERIES HUMIDIFIER TO TOP-MOUNTED XT STEAM BLOWER

Hose clamp (provided)

Steam hose (provided)

Hose clamp (provided)

OM-7976

Notes:

• Maximum recommended distance between humidiﬁ er and XT steam blower is 10’ (3 m).

• Models XTP 025 and 033 are not intended for use with a direct-mounted steam blower.

• Models XTP 042 through 096 are not intended for use with a steam blower.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 21

Humidiﬁ er wiring

All wiring must be code approved and in accordance with the unit wiring diagram. Power supply wiring must be rated for 105 °C. See Figure 17-1 for the humidiﬁ er wiring diagram locations.

When selecting a location for installing the humidiﬁ er:

• Avoid areas close to sources of electromagnetic emissions such as power distribution transformers.

• Do not loop power wiring.

• Do not use aluminum wire.

CONDUIT KNOCKOUTS

Conduit and control wiring knockouts are provided on the XT Series humidiﬁ er cabinet. See Figure 5-1.

INSTALLATION

WARNING

Electric shock hazard

Only qualiﬁ ed electrical personnel should perform ﬁ eld wiring installation procedures. Improper wiring or contact with energized circuits may cause property damage, severe personal injury, or death as a result of electric shock and/or ﬁ re.

CONTROL COMPONENT PLACEMENT

Follow the guidelines on Page 19 for placing humidistats, transmitters, and airﬂ ow proving switches.

CAUTION

Adding conduit connections not recommended

Adding alternate conduit connections is not recommended. If you must make additional holes in the humidiﬁ er cabinet, protect all internal components from debris, and vacuum out the cabinet when ﬁ nished. Failure to follow these precautions can damage sensitive electronic components and void the DriSteem warranty.

FIGURE 17-1: FIELD WIRING REQUIREMENTS

Wiring diagram inside of humidiﬁ er cabinet

Power supply

Fused disconnect

OM-7692

XT Series humidiﬁ er

Notes:

• Control wiring and power wiring must be run in dedicated or separate earthed metal conduit, cable trays, or trunking.

• Separate the line voltage wiring from low voltage control circuit wiring when routing electrical wiring inside the humidiﬁ er cabinet.

• Do not use chassis or safety grounds as current-carrying commons. Never use a safety ground as a conductor or neutral to return circuit current.

• For circuit protection requirements, see recommended fusing in Table 4-1.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 22

INSTALLATION

Humidiﬁ er wiring

CONNECTION INSTRUCTIONS

Before connecting power, refer to the wiring diagram or the data plate on the outside of the cabinet for wire sizing amperage.

For control signal wiring from a humidistat, transmitter, or signal by others, see the wiring diagrams shipped inside the humidiﬁ er.

See “Step 1 – Field wiring” in the Vapor-logic Installation and Operation Manual for detailed instructions on the following:

• Control input wiring:

See the “Control input” section.

• Duct airﬂ ow proving switch and duct high limit humidistat wiring (recommended optional devices):

See the following sections:

“Airﬂ ow proving switch” and “Duct high limit switch or transmitter”

• Remote signal wiring:

See the following sections:

“Programmable triac” and “Programmable relay (dry contact)”

EARTH GROUNDING REQUIREMENTS

A code-approved safety earth grounding system is required. The ground connection must be made with solid metal-to-metal connections. Ground wire should be the same size as power wiring.

UNITS WITH STEAM BLOWER

Steam blowers (SDUs) receive power for operation from the XT series humidiﬁ er. Install 2 fuses in the XT unit to provide power to the steam blower. Fuses are shipped with the steam blower. Replacements available from DriSteem.

WARNING

Excessive moisture hazard

DriSteem strongly recommends installing a duct airﬂ ow proving switch and a duct high limit humidistat. These devices prevent a humidiﬁ er from making steam when there is low airﬂ ow in the duct or when the RH level in the duct is too high. Failure to install these devices can result in excessive moisture in the duct, which can cause bacteria and mold growth or dripping through the duct.

Proper wiring prevents electrical noise.

Electrical noise can produce undesirable effects on electronic control circuits, which affects controllability. Electrical noise is generated by electrical equipment, such as: inductive loads, electric motors, solenoid coils, welding machinery, or ﬂ uorescent light circuits. The electrical noise or interference generated from these sources (and the effect on controllers) is difﬁ cult to deﬁ ne, but the most common symptoms are erratic control or intermittent operational problems.

Important:

• For maximum EMC effectiveness, wire all humidity, high limit, and airflow controls using multicolored shielded/screened plenum-rated cable with a drain wire for the shield/screen. Connect the drain wire to the shield/screen ground terminal with wire less than 2" (50 mm) in length.

• Do not ground shield at the device end.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 23

Sensor placement

INSTALLATION

SENSOR LOCATION IS CRITICAL

Sensor location has a signiﬁ cant impact on humidiﬁ er performance. See the recommendations below and Figure 19-1.

Note: DriSteem recommends that you do not interchange room and duct

humidity devices. Room humidity devices are calibrated with zero or little airﬂ ow, whereas duct humidity devices require air passing across them.

Recommended humidity control (transmitter/humidistat) locations:

A. Ideal. Ensures the best uniform mix of dry and moist air with stable

temperature control.

B. Acceptable, but room environment can affect controllability, such as when

sensor is too close to air grilles, registers, or heat radiation from room lighting.

C. Acceptable. Provides uniform mixture of dry and moist air. If extended time

lag exists between humidity generation and sensing, extend sampling time.

D. Acceptable (behind wall or partition) for sampling entire room if sensor is

near an air exhaust return outlet. Typical placement for sampling a critical area.

E. Not acceptable. These locations might not represent actual overall

conditions in the space.

Other factors affecting humidity control

Humidity control involves more than the controller’s ability to control the system. Other factors that play an important role in overall system control are:

• Size of humidification system relative to load

• Overall system dynamics associated with moisture migration time lags

• Accuracy of humidistats and humidity transmitters and their location

• Dry bulb temperature accuracy in space or duct

• Velocities and airflow patterns in ducts and space environments

• Electrical noise or interference

F. Not acceptable. Do not place sensors near windows, door passageways,

or areas of stagnant airﬂ ow.

Recommended safety (airﬂ ow and high limit) sensor location:

G. Best sensing location for high limit humidistat or humidity sensor and airﬂ ow

proving switch.

FIGURE 19-1: RECOMMENDED SENSOR LOCATIONS

Outside air

Relief air

Damper control

Return air

Window

Air handling

Wall or partition

unit

8' to 12'

(2.4 m to 3.7 m)

min.

High limit humidistat or high limit transmitter (set at 90% RH maximum)

Airﬂ ow switch or differential pressure switch (sail type recommended for VAV applications)

Vapor absorption has taken place

Point of vapor absorption

Humidiﬁ er dispersion assembly

Turning vanes

Doorway

Window

DC-1084 mc_060508_0750-XT

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 24

INSTALLATION

Dispersion:

DriSteem humidiﬁ ers operate with several types of dispersion assemblies for open spaces and for ducts and air handling units.

Dispersion assemblies in ducts and air handling units must be positioned where the water vapor being discharged is carried off with the airstream and is absorbed before it can cause condensation or dripping.

• In general, the dispersion assembly is best placed where the air can absorb the moisture being added without causing con den sa tion at or after the unit. This normally will be after the heating coil or where the air tem per a ture is highest.

Selecting the dispersion assembly location

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 25

INSTALLATION

Dispersion:

• Place the dispersion assembly such that absorption will occur:

– before the intake of a high efﬁ ciency ﬁ lter, because the ﬁ lter can remove

the visible moisture and become waterlogged; – before coming in contact with any metal surface; – before ﬁ re or smoke detection devices; – before a split in the duct; otherwise, the dispersion assembly can direct

more moisture into one duct than the other.

• When draining dispersion condensate to an open drain, provide a 1" (25 mm) air gap between the condensate drain piping and the drain. Locate the gap only in spaces with adequate temperature and air movement to absorb ﬂ ash steam; otherwise, condensation may form on nearby surfaces.

Selecting the dispersion assembly location

WARNING

Hot surface and steam hazard

Dispersion assembly and steam hose or tubing can contain steam, and surfaces can be hot. Discharged steam is not visible. Contact with hot surfaces or air into which steam has been discharged can cause severe personal injury.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 26

INSTALLATION

Dispersion:

CONDENSATE RETURN GUIDELINES

Returning condensate to steam cylinder

To prevent overﬁ lling the steam cylinder, follow the condensate guidelines below:

• When condensate can be returned to the steam cylinder:

– Single dispersion tube – Up to 20 lbs/hr (9.1 kg/h) of steam production – 10' (3 m) or less of steam hose between humidiﬁ er and dispersion – 20' (6 m) or less of tubing between humidiﬁ er and dispersion

• When condensate should be wasted to the drain:

– Ultra-sorb or Rapid-sorb dispersion – Single dispersion tube with condensate drain – Single dispersion tube with:

- More than 20 lbs/hr (9.1 kg/h) or more of steam production, or

- More than 10' (3 m) of steam hose between humidiﬁ er and dispersion

- More than 20' (6 m) of tubing between humidiﬁ er and dispersion

XT Series humidifier steam outlet

The steam outlet on the humidiﬁ er is sized to the output of the humidiﬁ er. DO NOT use interconnecting steam hose or tubing with an inside diameter smaller than the humidiﬁ er steam outlet. Reducing the inside diameter will result in the internal humidiﬁ er system pressure exceeding the parameters for acceptable performance.

• See maximum steam carrying capacities in Table 26-1 and 27-1.

• If the humidifier must be located higher than the dispersion assembly, use the recommended installation shown in Figure 29-1.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 27

INSTALLATION

Dispersion:

FIGURE 23-1: STEAM OUTLET CONNECTIONS, MODELS XTP 002 THROUGH 025

Connector (optional)* See Caution below

Steam outlet connections

Models XTP 002 through 006

To dispersion assembly To dispersion assembly

1½” (DN40) steam hose

1” (DN25) steam hose, 12" (305 mm) long (optional)*

Hose clamp (optional)*

Models XTP 010 through 025

1½” (DN40) I.D. steam hose**

Hose clamp**

OM-7977

* Provided in optional connector kit Part No. 191070-100 (see Table 61-1) ** Provided by installer.

OM-7978_aa

CAUTION

Connector kit location

Install the connector for increasing from 1” to 1½” (DN25 to DN40) hose or tube immediately above the XT Series humidiﬁ er as shown above.

Failure to install the connector kit immediately above the humidiﬁ er will cause system pressure ﬂ uctuations and increase cylinder pressure, steam velocity, and condensate noise.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 28

INSTALLATION

Dispersion:

FIGURE 24-1: STEAM OUTLET CONNECTIONS WITH HOSE, MODELS XTP 033 THROUGH XTP096 WITHIN 10' (3 M) OF DISPERSION ASSEMBLY

Steam outlet connections with hose

WARNING

Preventing back pressure/abnormal operation in dual cylinder humidiﬁ ers and installations where two individual units are connected to a single dispersion panel.

Read and follow all steam hose installation instructions. Failure to follow these instructions could result in excessive back pressure or abnormal operation of the unit. Severe personal injury or damage to the unit may result.

Models XTP 033, 042, and 048

To dispersion assembly

2" (DN50) steam hose, 10' (3 m) maximum

Stainless steel Y connector*

Hose clamp*

1½" (DN40) steam hose*, 12" (305 mm) long

Notes:

• For horizontal runs longer than 5' (1.5 m) or vertical runs long than 10' (3m), tubing is required. Do not use steam hose.

• See Table 61-1 for optional kits listed below.

* Provided in optional connector kit Part No. 191070-101 ** Provided in optional connector kit Part No. 191070-002 *** Provided in optional connector kit Part No. 162825-202F

OM-7979

Models XTP 067 through 096

3" (DN80) ﬂ ange connection*** attaches directly to dispersion

2" (DN50) steam hose. Each cylinder to connect to dispersion separately. For distance greater than 10', use hard pipe.

Stainless steel Y connector*

Hose clamp*

1½" (DN40) steam hose*, 12" (305 mm) long

Model XTP 050

Hose clamp**

Stainless steel tube connector**

Steam hose** attaches directly to dispersion, 2" (DN50) on Ultra-sorb and Rapid-sorb

1½" (DN40) steam hose. Each cylinder to connect to dispersion separately. For distance greater than 10', use hard pipe.

OM-7980-XT

OM-7981

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 29

INSTALLATION

Dispersion:

FIGURE 25-1: CONNECTING TWO CYLINDERS TO A DISPERSION ASSEMBLY

2" (DN50) steam hose connection

1½" (DN40) hose connections from two cylinders

Steam outlet connections with hose

OM-7913

WARNING

Preventing back pressure/abnormal operation in dual cylinder humidiﬁ ers and installations where two individual units are connected to a single dispersion panel.

3" (DN80) ﬂ ange connection

2" (DN50) hose connections from two cylinders

OM-7914

Notes:

• For two cylinders, connect the stainless steel tube connector directly to the dispersion inlet as shown. The diameter and pitch of the tube connector must match the inlet diameter and pitch of the dispersion unit.

• Always run separate steam hose/tubing from each cylinder to the connection of the dispersion device.

Only connect a maximum of two cylinders to any single dispersion unit.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 30

INSTALLATION

Dispersion:

Interconnecting piping requirements

Condensate control and collection

Controlling condensate ﬂ ow and collection in an XT Series humidiﬁ er system is critical to performance. To maximize humidiﬁ er performance:

• See Table and 26-1.

• Follow all installation recommendations for your specific humidifier and dispersion assembly from here through Page 44.

Table 26-1: Maximum steam carrying capacity and length of interconnecting steam hose and tubing for

Models XTP 002 through XTP096

DriSteem steam hose*

Model

Hose I.D.

XTP inches DN lbs/hr kg/h ft m inches DN lbs/hr kg/h ft m

Maximum capacity

per cylinder

†

Maximum

††

length

(Insulate tubing to minimize loss of capacity and efﬁ ciency.)

Tube size

Copper or stainless steel tubing

Maximum capacity

per cylinder

†

developed length

Maximum

†††

002 1½ 40 5 2 10 3 1½ 40 5 2 13 4.0

003 1½ 40 10 5 10 3 1½ 40 10 5 25 7.6

006 1½ 40 18 8 10 3 1½ 40 18 8 50 15.2

010 1½ 40 30 14 10 3 1½ 40 30 14 50 15.2

017 1½ 40 50 22 10 3 1½ 40 50 22 50 15.2

025,

050**

033,

067**

042,

083**

048,

096**

Notes:

• Values in this table are based on XT Series humidiﬁ ers, and condensate ﬂ owing in direction of steam (steam hose or tubing pitched toward dispersion device).

Use DriSteem steam hose for best results. Field-supplied hose may have shorter life and may cause foaming in cylinder, resulting in condensate

discharge at dispersion assembly. Do not use steam hose for outdoor applications.

These models have two steam cylinders. Capacities based on use with ﬁ ll cup extensions.

†

For Models XTP 050 through XTP 096, capacities listed are maximum steam carrying capacity per tube attached to each cylinder, with separate

steam tubing from each cylinder to connection on dispersion device. See Figure 24-1.

††

DriSteem recommends 10' (3 m) maximum steam hose length pitched at 2"/ft (15%). Steam hose can sag if not supported for its full length.

Sagging leads to collecting condensate and system pressure issues. Metallic tubing is less prone to sagging and can allow for 1/8"/ft (1%) pitch minimum and longer distances.

†††

Developed length of tubing equals measured length plus 50% of measured length, to account for ﬁ ttings.

1½ 40 75 34.0 10 3 1½ 40 75 34.0 100 30

2 50 100 45.4 10 3 2 50 100 45.4 100 30

2 50 125 56.7 10 3 2 50 125 56.7 100 30

2 50 143 65.0 10 3 2 50 143 65.0 100 30

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 31

INSTALLATION

Dispersion:

CONNECTING TO HUMIDIFIER WITH STEAM HOSE

Interconnecting piping requirements

• Support steam hose for its full length to prevent sags, or low spots:

– For single dispersion tube without condensate drain, maintain a

minimum pitch of 2"/ft (15%) toward the steam cylinder.

– For dispersion devices with condensate drain, maintain a minimum pitch

of 2"/ft (15%) toward the dispersion device.

• Use DriSteem steam hose. Other manufacturers of steam hose may use unacceptable release agents or material mixes that can affect humidiﬁ er system performance adversely. Using hose from alternative manufacturers increases the possibility of foaming in the cylinder and accelerated steam hose aging. Foaming causes condensate discharge at the dispersion assembly.

• Do not use steam hose in outdoor applications.

• Do not insulate steam hose. Insulation causes accelerated heat aging, causing the steam hose to become hard and susceptible to failure due to cracks.

• For single dispersion tube applications, see hose kit sizes in Table 32-1.

For tubing connections, see "Connecting to humidiﬁ er with tubing" on page 28.

Important:

Steam hose must be supported for its full length to prevent sagging or low spots.

Table 27-1: Steam loss of interconnecting steam hose and tubing

Description

Steam hose

Tubing

Note: These data are based on an ambient air temperature of 80 °F (27 °C), ﬁ berglass insulation, and copper tubing.

Nominal hose or tubing size

inches DN lbs/hr/ft kg/h/m lbs/hr/ft kg/h/m inches mm

1½ 40 0.15 0.22 N/A N/A N/A N/A

2 50 0.20 0.30 N/A N/A N/A N/A

1½ 40 0.11 0.164 0.02 0.03 2 50

2 50 0.14 0.21 0.025 0.037 2 50

Noninsulated Insulated

Steam loss

Insulation thickness

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 32

INSTALLATION

Dispersion:

Connecting to humidifier with tubing

See Figures 31-1 and 32-1 for interconnecting tubing pitch requirements for single dispersion tube applications. See Table 34-3 for interconnecting tubing pitch requirements for Rapid-sorb applications.

• Support tubing between the humidiﬁ er steam outlet and the dispersion system with pipe hangers. Failure to properly support the entire tubing weight may cause damage to the humidiﬁ er tank and void the warranty.

• Ground metal steam tubing. See “Grounding steam tubing” at right.

• 90° elbows are not recommended. DriSteem recommends 90° long sweeps. Two 45° elbows, 1' (0.3 m) apart may also be used.

• Insulating tubing reduces the loss in output caused by condensation.

• If ﬂ ux or any other surface preparation material is used when connecting steam tubing and ﬁ ttings, drain and ﬁ ll the steam cylinder two times after the ﬁ rst half hour of steam production:

– Model XTP, step 5 on page 48 This will minimize the possibility of foaming in the steam cylinder.

Important:

Failure to follow the recommendations in this section can result in excessive back pressure on the humidiﬁ er. This will result in unacceptable humidiﬁ cation system performance such as leaking gaskets, blown water seals, erratic water level control, and spitting condensate from dispersion tubes.

Grounding steam tubing

The XT Series humidiﬁ er has built-in functionality for detecting and eliminating foaming in the steam cylinder. However, because brief periods of foaming are possible, grounding metal steam tubing back to the humidiﬁ er earth ground lug is necessary. This earth ground will prevent foam from creating an electrically conductive path from the electrically charged cylinder water to the metal steam tubing.

FIGURE 28-1: DETAIL OF VERTICAL RISER DRIPS

90° long sweep or two 45° elbows

Insulate tubing to reduce steam loss

XT Series humidiﬁ er

OM-7680

Pitch

3/4" (DN20)

1" (25 mm) air gap

Pitch

To dispersion assembly

Tubing drip tee

6" (150 mm)

recommended

8" (200 mm) recommended

Open funnel or ﬂ oor drain

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 33

INSTALLATION

Dispersion:

Drip tee installation

Install a drip tee as shown below when the humidiﬁ er is mounted higher than the dispersion assembly, when interconnecting hose or tubing needs to go over an obstruction, or when interconnecting piping runs are long.

FIGURE 29-1: DRIP TEE INSTALLATION

90° long sweep or two 45° elbows

Obstruction

Insulate tubing to reduce steam loss

Pitch

XT Series humidiﬁ er

OM-7695

To dispersion assembly

6" (150 mm) recommended

8" (200 mm) minimum

1" (25 mm) air gap

Open funnel or ﬂ oor drain. See ﬁ rst note below.

Notes:

• Locate air gap only in spaces with adequate temperature and air movement to absorb ﬂ ash steam; otherwise, condensation may form on nearby surfaces. Refer to governing codes for drain pipe size and maximum discharge water temperature.

• Support steam hose for its full length so there are no sags or low spots.

• Dashed lines indicate provided by installer.

mc_062810_0645-XT

Tubing drip tee, by installer (see Part No. in Table 61-1)

3/4" (DN20)

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 34

INSTALLATION

Dispersion:

DISPERSION TUBE WITH OR WITHOUT CONDENSATE DRAIN

Single dispersion tube

• Use a hose cuff and clamps to connect the steam outlet to tubing.

• Tubing diameter must match XT steam outlet connection.

• See maximum steam carrying capacities in Table 26-1 and steam loss in Table 27-1.

• If mounting the humidiﬁ er above the level of dispersion tube, see "Drip tee installation" on Page 29. See also "Vertical riser drip details" in Figure 28-1.

DISPERSION TUBE WITHOUT CONDENSATE DRAIN, XTP 002 THROUGH 006

• See Figure 31-1.

• Maximum capacity of 1½" (DN40) dispersion tube without condensate drain is 29 lbs/hr (13.2 kg/h) insulated; 28 lbs/hr (12.7 kg/h) uninsulated.

• Condensate can ﬂ ow back to the cylinder against 20 lbs/hr (9.1 kg/h) steam ﬂ ow. Pitch the steam supply line back toward the humidiﬁ er (see Figure 31-1).

Important:

CAUTION

Connector kit location

Install the connector for increasing from 1” to 1½” (DN25 to DN40) hose or tube immediately above the XT Series humidiﬁ er as shown in Figure 31-1.

Failure to install the connector kit immediately above the humidiﬁ er will cause system pressure ﬂ uctuations and increase cylinder pressure, steam velocity, and condensate noise.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 35

INSTALLATION

Dispersion:

FIGURE 31-1: SINGLE DISPERSION TUBE WITHOUT CONDENSATE DRAIN, MODELS XTP 002 THROUGH 006 ONLY

Tubing must be grounded. Insulate tubing to reduce steam loss. See Table 26-1 for maximum tubing lengths.

See ﬁ rst bullet in installation notes above.

Optional connector (see Caution above)

Note: Dashed lines indicate provided by installer.

* Pitch steam hose or tubing toward humidiﬁ er:

• 2"/ft (15%) when using steam hose

• ½"/ft (5%) when using 1½" tubing

• ¼"/ft (2%) when using 2" tubing

Single dispersion tube

Single dispersion tube without condensate drain

Pitch*

Secure and seal escutcheon plates.

90° long sweep or two 45° elbows

XT Series humidiﬁ er

Duct

4.5" (115 mm) minimum from top of duct

Pitch 2"/ft (15%)

OM-7693

Mounting nut, 3/8" - 16 (M10)

Dispersion tube: Orient with tubelets (steam oriﬁ ces) pointing up.

Dispersion tube escutcheon plate

OM-351-1

Dimension A: 3.25" (82.5 mm) for 1½" tubes

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 36

INSTALLATION

Single dispersion tubeDispersion:

DISPERSION TUBE WITH CONDENSATE DRAIN, MODELS XTP 010 AND 017

• See Figure 32-1.

• Maximum capacity of 1½" (DN40) dispersion tube with condensate drain is 65 lbs/hr (29.5 kg/h) insulated; 62 lbs/hr (28.1 kg/h) uninsulated.

• Models XTP 010 through XTP096 have capacities requiring dispersion devices with condensate drains. DriSteem recommends pitching steam tubing for these models towards the dispersion device. For XT

Table 32-1: Hose kit sizing by capacity

Hose kit

(steam hose,

dispersion tube,

and hardware)

1½" (DN40) without drain 29.0 13.2 28.0 12.7

1½" (DN40) with drain 65.0 29.5 62.0 28.1

Insulated Uninsulated

lbs/hr kg/h lbs/hr kg/h

Maximum

tube capacity

Series humidiﬁ ers with capacities more than 20 lbs/ hr (9.1 kg/h), the installer should not attempt to drain condensate back to the cylinder. When a vertical riser is required in the steam tubing, a drip tee is required

These capacities require multiple tube assemblies and cannot use a single hose kit.

>65.0 >29.5 >62.0 >28.1

in order to eliminate a condensate collection point that will restrict steam ﬂ ow. See vertical riser examples in Figure 28-1.

Capacities of Models XTP 025 through XTP096 require multiple tube assemblies and cannot use a hose kit. For multiple tube assemblies, see “Rapid-sorb” beginning on Page 33.

• If maximum developed length is more than 20' (6 m) and duct static pressure exceeds 2" wc (498 Pa), a ﬁ ll cup extension kit (Figure 11-1) is required.

FIGURE 32-1: SINGLE DISPERSION TUBE WITH CONDENSATE DRAIN, MODELS XTP 002 THROUGH 017 ONLY

Tubing must be grounded. Insulate tubing to reduce steam loss. See Table 27-1 for maximum tubing lengths.

90° long sweep or two 45° elbows

XT Series humidiﬁ er

5" (125 mm)

1" (25 mm) air gap

OM-7694

Pitch*

6" (150 mm) recommended

Water seal

Secure and seal escutcheon plates

Duct

1/4" NPT (DN8)

3/4" (DN20) (minimum) condensate drain tube by installer. Must be suitable for 212 °F (100 °C) water.

Open drain required. Locate air gap only in spaces with adequate temperature and air movement to absorb ﬂ ash steam; otherwise, condensation may form on nearby surfaces. Refer to governing codes for drain pipe size and maximum discharge water temperature.

Single dispersion tube with condensate drain; orient dispersion tube with tubelets (steam oriﬁ ces) pointing up.

Pitch tube toward drain 1/8"/ft (1%).

Mounting nut, 3/8"–16 (M10)

4.5" (115 mm) minimum from bottom of duct

1/2" O.D. (DN15) condensate drain tube. Pitch 1/4”/ft (2%) toward escutcheon plate.

* Pitch steam hose or tubing toward humidiﬁ er:

• 2"/ft (15%) when using steam hose

• 1/8"/ft (1%) when using tubing

Note: Dashed lines indicate provided by installer.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Escutcheon plates

Dispersion tube

OM-351-1

Dimension A: 3.25" (82.5 mm) for 1½" tubes

Condensate drain

Page 37

INSTALLATION

Dispersion:

Rapid-sorb

Read all dispersion instructions in this manual, and follow the installation instructions below:

• Unpack shipment and verify receipt of all Rapid-sorb

components with packing list. Report any shortages to DriSteem immediately. The components typically include the following:

– Multiple dispersion tubes – Header – 3/4" × 2" (19 mm × 51 mm) L-bracket Note: Dispersion tubes, header, and L-bracket are each tagged with the

customer requested identiﬁ cation number. – A single duct escutcheon plate the size of the header – Slip couplings or hose cuffs and clamps – Accessories such as duct plates, slip couplings, or hose cuffs – Bolts and washers for mounting the dispersion tubes to the bracket

• L-bracket mounting holes (see note):

– L-bracket 50" (1270 mm) long or shorter has a mounting hole 4" (100

mm) from each end for mounting the L-bracket to the duct or air handler wall.

– L-bracket longer than 50" (1270 mm) has an additional mounting hole

in the center.

Note: Hardware for mounting the L-bracket to the duct or air handler

wall and the hardware for the header support bracket is not

provided.

• Select an installation location that provides necessary access in and around the ductwork or air handler.

• The Rapid-sorb typically is installed centered side to side in a duct, or is installed across the face of a coil in an air handler.

WARNING

Hot surface and steam hazard

Important:

Before marking and drilling holes in the duct or air handler, refer to ALL pitch re quire ments for the Rapid-sorb as sem bly you received (see page 34). The size, quan ti ty, and location of penetrations are determined by the dimensions and conﬁ guration of the Rapid-sorb assembly you received.

Important:

• The center line of the outer dispersion tubes should never be closer than

4.5" (114 mm) from the side of the ductwork or air handler wall.

• The following instructions are for a typical Rapid-sorb installation — horizontal-airﬂ ow duct with Rapid-sorb header either inside or outside the duct. See the DriCalc Installation Guides library or contact your representative/distributor or DriSteem for installation instructions for air handler or vertical airﬂ ow applications.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 38

INSTALLATION

Dispersion:

PITCH REQUIREMENTS

Rapid-sorb

• For Rapid-sorb with the header outside a horizontalairﬂ ow duct, consider the following:

– 1½" (DN40) dispersion tubes: Use a fastener of

sufﬁ cient length to ac com mo date the 1/8"/ft (1%) pitch requirement toward the 3/4" pipe thread (DN20) header drain ﬁ tting.

– 2" (DN50) dispersion tubes: Bracket can be

mounted ﬂ ush to ductwork. Typically, the 1/8"/ft (1%) pitch can be accomplished in the length of the hose cuffs used to connect tubes to header.

• See Table 34-3 and the drawings on the following pages for pitch requirements.

Table 34-1: Rapid-sorb dispersion tube capacities*

Tube capacity

Tube

diameter

inches DN lbs/hr kg/h lbs/hr kg/h

1½ 40 43.0 19.5 40.0 18.2

2 50 80.0 36.4 77.0 35.0

* Capacities shown are for horizontal airﬂ ow.

See DriCalc for vertical airﬂ ow capacities. If face height is <22" (559 mm), tube quantity per panel may need to increase to compensate for reduced capacity of short tubes. Consult DriSteem or see DriCalc sizing and selection software for the correct calculation.

Insulated

(High-Efﬁ ciency Tubes)

Uninsulated

Table 34-2: Rapid-sorb header capacities

Header capacity Header diameter

lbs/hr kg/h inches DN

≤ 250 ≤ 113 2 50

251-500 114-227 3 80

501-800 228-363 4 100

801-1300 364-591 5 125

1301-2100 592-955 6 150

Table 34-3: Pitch of interconnecting piping, dispersion tubes, and headers for Rapid-sorb evaporative dispersion units

Airﬂ ow

Horizontal

Vertical

Type of

interconnecting piping

Steam hose

Tubing

Steam hose

Tubing

Diameter of

interconnecting piping

1½" (DN40)

2" (DN50)

1½" (DN40)

2" (DN50)

1½" (DN40)

2" (DN50)

1½" (DN40)

2" (DN50)

Pitch of

interconnecting piping

2"/ft (15%)

toward Rapid-sorb

1/8"/ft (1%)

toward Rapid-sorb

2”/ft (15%)

toward Rapid-sorb

1/8”/ft (1%)

toward Rapid-sorb

Pitch of

dispersion tubes

Vertically

plumb

2"/ft (15%)

toward header

Pitch of header

1/8”/ft (1%)

toward

condensate

drain

1/8”/ft (1%)

toward

condensate

drain

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 39

INSTALLATION

Dispersion:

FIGURE 35-1: RAPID-SORB IN A HORIZONTAL AIRFLOW WITH HEADER INSIDE THE DUCT

L-bracket. Install with ﬂ ange facing upstream direction of airﬂ ow. Drawing shows L-bracket correctly positioned for airﬂ ow.

Dispersion tube. Orient with tubelets perpendicular to airﬂ ow.

90° long sweep or two 45° elbows

Tubing must be grounded. Insulate tubing to reduce steam loss. See Tables 26-1 and 27-1 for maximum tubing lengths. See Notes.

XT Series humidiﬁ er

Notes:

1. Use a hose cuff and clamps to connect steam outlet to tubing.

2. See installation procedure on Page 37.

3. Dashed lines indicate provided by installer.

Rapid-sorb with Models XTP 025 through 048

Slip coupling or hose cuff

• 2"/ft (15%) when using steam hose

• ¼"/ft (2%) when using 2" tubing

Secure and seal escutcheon plates.

Header pitch: 1/8"/ft (1%) minimum

OM-7696

Condensate drain: 3/4" pipe thread (DN20)

3/4" (DN20) copper

1" (25 mm) air gap

Open drain required: Locate air gap only in spaces with adequate temperature and air movement to absorb ﬂ ash steam; otherwise, condensation may form on nearby surfaces. Refer to governing codes for drain pipe size and maximum discharge water temperature.

Airﬂ ow

Duct

5" (125 mm) recommended

Support bracket has

0.421" (11 mm) mounting holes at top, bottom, and end)

6" (150 mm) recommended

WARNING

Hot surface and steam hazard

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 40

INSTALLATION

Dispersion:

Rapid-sorb and Ultra-sorb with Models XTP 050 through 096

Models XTP 050 through XTP 096 have capacities requiring dispersion devices with condensate drains (Figure 35-1). For these models, DriSteem recommends the following:

• Run separate steam tubing from each cylinder to the connection on the dispersion device.

• Pitch steam tubing toward the dispersion device.

The installer should not attempt to drain condensate back to the cylinder. When a vertical riser is required in the steam tubing, a drip tee is required in order to eliminate a condensate collection point that will restrict steam ﬂ ow.

FIGURE 36-1: DUAL-CYLINDER XT SERIES HUMIDIFIER CONNECTED TO RAPID-SORB OR ULTRA-SORB WITH RISER DRIPS IN STEAM SUPPLY LINES

WARNING

Preventing back pressure in dual-cylinder humidiﬁ ers

Read and follow all steam tubing installation instructions for dual-cylinder humidiﬁ ers. Failure to follow these instructions could result in excessive back pressure and the risk of equipment damage or severe personal injury.

Pitch*

Rapid-sorb steam dispersion panel

Pitch*

Dual-cylinder XT Series humidiﬁ er

Drip tee

Drain

Pitch*

Drain

Ultra-sorb steam dispersion panel

OM-7982-XT

Drain

Notes: * Pitch 1/8"/ft (1%) minimum toward dispersion panel.

• See installation notes in Figure 25-1.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 41

Rapid-sorbDispersion:

WITH HEADER INSIDE OF DUCT FOR HORIZONTAL AIRFLOW

Note: See the instructions for installing Rapid-sorb with the header outside the

duct for horizontal airﬂ ow.

1. Mark and cut holes in ductwork or air handler for steam header pen e tra tion, con den sate drain piping, and head er support bracket fastener. Allow 1/8"/ft (1%) header pitch toward the support bracket when you drill the hole for the header support bracket fastener.

2. Loosely fasten the header in place.

3. Rotate the header 90° so the header stubs point hor i zon tal ly in the duct.

When installing in an air handler, the rotation of the header is often less

than 90°. Typically, due to the condensate drain piping re quire ments, the header can be set on the ﬂ oor of the air handler, assembled in the vertical position, and then raised and mounted in place.

INSTALLATION

CAUTION

Operate Rapid-sorb within rated steam capacity

Excessive steam ﬂ ow to the Rapid-sorb steam dispersion assembly can cause condensate to exit the tubelets, which can cause water damage and standing water in the duct or air handler.

To avoid condensate exiting the tubelets, do not operate the Rapid-sorb beyond its rated capacity.

4. Mount the dispersion tubes on the header with the slip couplings or hose cuffs:

• When installing slip couplings for 1½" (DN40) dispersion tubes, take

care not to shear O-rings.

• Set slip coupling on header stub or dis per sion tube so O-ring is resting

on face of tubing.

• Rotate slip coupling while pushing it onto the tubing.

• O-rings are lubricated at factory. If additional lubrication is necessary,

DO NOT use petroleum-based lubricant.

5. Allow the dispersion tubes to rest against the bottom of the duct.

With header outside of duct for horizontal airflow

1. Mark and cut holes in the ductwork for the dispersion tubes. Use the L-bracket as a template to mark the holes on the duct ﬂ oor.

2. Temporarily, loosely suspend or support the header below the ﬁ nal location. Vertical balance point of the dispersion tube length dictates where the header should be suspended or temporarily supported.

3. Continue with Step 4 at right.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 42

INSTALLATION

Rapid-sorbDispersion:

6. Position the flange of the L-bracket so it is upstream of the tubes when the assembly is rotated into position. Fasten the L-bracket to the end of the dispersion tubes with the provided bolt, lock washer, and flat washer.

7. Rotate the assembly up until the L-bracket aligns with the mounting holes in the duct or air handler.

• For 1½" (DN40) dispersion tubes:

– Header pitch is duplicated in the L-bracket. – Dispersion tube and slip coupling must be fully engaged on header

stub for O-rings to provide a seal. – High end of L-bracket can be fastened tight to duct or air handler. – Fastener on low end of L-bracket must be long enough to compensate

for pitch. Use a nut on both sides of L-bracket and duct or air handler

for stability.

• 2" (DN50) dispersion tubes – Fasten bracket to top of duct and use hose cuffs to compensate for

header pitch.

– Before securing hose cuffs with hose clamps on dispersion tube

and header stub, verify that dispersion tube oriﬁ ces are directed perpendicular to airﬂ ow.

8. Verify that all fasteners are secure:

• L-bracket to duct

• Dispersion tubes to L-bracket

• Hose clamps on 2" (DN50) tubes

• Header support bracket fastener

Note:

See Page 39 for steam supply and condensate drain line connection instructions.

9. Secure and seal the header escutcheon plate around the header.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 43

Rapid-sorbDispersion:

STEAM SUPPLY CONNECTIONS TO RAPID-SORB HEADER

Connect the steam supply interconnecting piping from the humidiﬁ er to the Rapid-sorb. Steam supply piping requires a minimum of 1/8"/ft (1%) pitch toward the header.

If two humidiﬁ ers are supplying one Rapid-sorb, a steam supply connector is needed. Typically, the steam supply connector attaches to the Rapid-sorb header supply end with hose cuff and clamps:

1. Always run separate steam tubing from each cylinder to the connection on the dispersion device. Connect a maximum of two cylinders to any single dispersion unit. See page 24 for more detailed instructions and connector kit part numbers.

2. Position the steam supply connector to accept the steam supplies while

maintaining the necessary pitch.

3. Make sure the hose clamps on the steam supply connector and header are

tight.

INSTALLATION

CONDENSATE DRAIN CONNECTIONS TO RAPID-SORB HEADER

Piping must be minimum 3/4" I.D. (DN20) and rated for 212 °F (100 °C) minimum continuous operating temperature.

The condensate drain line must be piped as shown in Figure 35-1. Provide a 6" (150 mm) drop prior to a 5" (125 mm) water seal to:

• Ensure drainage of condensate from the header

• Keep steam from blowing out of the drain line

After the water seal, run the drain line to an open drain with a 1" (25 mm) vertical air gap.

• Cut the drain line at a 45° angle on the end above the drain to permit a

direct stream of water into the drain pipe while maintaining a 1" (25 mm) air gap.

• Locate air gap only in spaces with adequate temperature and air movement

to absorb ﬂ ash steam, or condensing on nearby surfaces may occur.

All drain lines must be installed and sized according to governing codes.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 44

INSTALLATION

XT steam blowersDispersion:

Fuses provided with the steam blowers must ﬁ rst be

XT STEAM BLOWER RISE, SPREAD, AND THROW

installed in the associated XT series humidiﬁ ers.

On a call for humidity, the controller closes the contactors to energize the humidiﬁ er electrodes and the XT steam blower. When the call for humidity is satisﬁ ed, the

Rise

Air intake

controller opens the humidiﬁ er contactor, which stops the steam blower.

Spread

Throw

Steam outlet

As steam is discharged from the XT steam blower, it quickly cools and turns to a visible fog that is lighter than

OM-7686

air. As this fog is carried away from the XT steam blower by the airstream, it tends to rise toward the ceiling. If the fog contacts solid surfaces (columns, beams, ceiling, pipes, etc.) before it disappears, it can condense and drip. The greater the space relative humidity, the further the fog will rise, spread, and throw.

Table 40-1 lists the maximum rise, spread, and throw non-wetting distances for XT Series humidiﬁ ers with XT steam blowers. Surfaces cooler than ambient temperature, or objects located within this minimum dimension, can cause condensation and dripping. To avoid steam impingement on surrounding areas, observe the minimum non-wetting distances in the table.

XT steam blowers are ﬁ eld wired to the XT Series humidiﬁ er blower terminals. A wiring diagram is included with the XT steam blower.

Table 40-1: XT steam blower minimum non-wetting distances

Model

XTP lbs/hr kg/h ft m ft m ft m ft m ft m ft m ft m ft m ft m ft m ft m ft m

002 5 2 0.7 0.2 0.9 0.3 1.9 0.6 0.8 0.2 1.2 0.4 2.1 0.6 1.1 0.3 1.5 0.5 2.5 0.8 1.5 0.5 1.5 0.5 3.2 1.0

003 10 5 1.4 0.4 1.9 0.6 3.8 1.2 1.7 0.5 2.4 0.7 4.3 1.3 2.3 0.7 3.0 0.9 5.0 1.5 3.0 0.9 3.0 0.9 6.5 2.0

006 20 8 2.5 0.8 2.8 0.9 6.5 2.0 3.0 0.9 3.3 1.0 7.4 2.3 3.8 1.2 4.0 1.2 8.5 2.6 4.0 1.2 4.0 1.2 10.0 3.0

010 30 14 3.1 0.9 3.0 0.9 7.5 2.3 3.6 1.1 3.4 1.0 8.7 2.7 4.3 1.3 4.0 1.2 9.5 2.9 4.2 1.3 3.5 1.1 11.0 3.4

017 50 22 3.3 1.0 3.1 0.9 9.6 2.9 3.8 1.2 3.5 1.1 10.7 3.3 4.4 1.3 4.0 1.2 12.0 3.7 4.8 1.5 4.7 1.4 14.0 4.3

025* 75 34 3.3 1.0 3.1 0.9 9.6 2.9 3.8 1.2 3.5 1.1 10.7 3.3 4.4 1.3 4.0 1.2 12.0 3.7 4.8 1.5 4.7 1.4 14.0 4.3

033* 100 45 3.3 1.0 3.1 0.9 9.6 2.9 3.8 1.2 3.5 1.1 10.7 3.3 4.4 1.3 4.0 1.2 12.0 3.7 4.8 1.5 4.7 1.4 14.0 4.3

Rise: Minimum non-wetting height above the steam outlet of the XT steam blower Spread: Minimum non-wetting width from the steam outlet of the XT steam blower Throw: Minimum non-wetting horizontal distance from the steam outlet of the XT steam blower * These models use two XT steam blowers.

Nominal

steam

capacity

30% RH @ 70 ºF (21 ºC) 40% RH @ 70 ºF (21 ºC) 50% RH @ 70 ºF (21 ºC) 60% RH @ 70 ºF (21 ºC)

Rise Spread Throw Rise Spread Throw Rise Spread Throw Rise Spread Throw

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 45

INSTALLATION

XT steam blowersDispersion:

FIGURE 41-1: XT STEAM BLOWER DIMENSIONS

SDU-006E shown

Front Side Back

OM-7688

Table 41-1: XT steam blower dimensions

SDU-006E SDU-017E

Dimension

inches mm inches mm

A 14.7 373 17.9 455

The XT steam blower can be mounted on top of an XT Series humidiﬁ er cabinet, or wallmounted remotely from the humidiﬁ er. See Figure 41-1.

SDU-006E, for capacities up to 20 lbs/hr (9.1 kg/h), can be directly mounted on Models XTP 002 through 006.

SDU-017E, for capacities up to 50 lbs/hr (22.7 kg/h), can be directly mounted on Models XTP 010 and 017.

XT Series humidiﬁ ers can be conﬁ gured to operate with one or two steam blowers. Multiple SDU-017 are used remotely with Model XTP 025 or 033. See Table 41-2.

Note: XT steam blower installation must comply

with governing codes.

Table 41-2: Single or multiple XT steam blowers for XT Series humidifiers*

Model

XTP

002 1 —

SDU-006

per kit

SDU-017

per kit

B 6.0 152 13.8 350

C 7.8 198 11.0 279

D 3.0 76 3.6 91

E 3.9 99 7.1 180

F 2.7 69 4.2 107

* XT steam blowers are sold as kits to match the associated XT Series

humidiﬁ er. The number of XT steam blowers per kit are shown in this table.

003 1 —

006 1 —

010 — 1

017 — 1

025 — 2

033 — 2

042 through 096 n/a n/a

Table 41-3: XT steam blower specifications

Model

SDU-006E 20 9.1 14.0 6.4 11.0 5.0 106 3.0 0.16 A 17 W 49 dBA

SDU-017E 50 22.7 29.0 13.2 24.0 10.9 665 18.8 0.23 A 23 W 53 dBA

Notes:

• XT steam blowers ship separately from XT Series humidiﬁ ers.

• Noise measurements taken 6.5' (2 m) in front of XT steam blower cabinet.

Maximum capacity Shipping weight Operating weight Volume airﬂ ow

lbs/hr kg/h lbs kg lbs kg cfm m

/min

Current draw at

115V (50/60 Hz)

Input

power

Noise

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 46

INSTALLATION

XT steam blowersDispersion:

MOUNTING XT STEAM BLOWER ON TOP OF HUMIDIFIER

The condensate tee kit shipped with the XT steam blower returns condensate from a top-mounted XT steam blower to the humidiﬁ er's cylinder ﬁ ll hose. See Figure 42-1. Install the kit as follows:

1. If humidifier is not already mounted to wall, see “Wall mounting humidifier” on Page 10.

2. Remove steam cylinder (see “Removing steam cylinder”on Page 10).

3. Assemble condensate hose from kit to condensate outlet at base of steam box, and install both plastic ties (included) on hose to ensure secure connection to steam box condensate outlet.

4. Assemble hose cuff and clamp to steam port on steam box.

5. Remove middle-rear knockout on top of humidifier cabinet, and mount XT steam blower to wall as noted on Page 43.

6. Feed condensate hose into humidifier cabinet through knockout hole created in Step 5, place XT humidifier below XT steam blower on wall, and secure humidifier to wall.

7. Push small burr of tee into loose end of condensate hose that was fed into cabinet in Step 6.

8. Cut midpoint of 5/8" fill hose that connects center port on fill cup to fill connection on floor of humidifier cabinet. Avoid kinks by leaving slack in fill hose for cylinder installation.

For remote-mounting the XT steam blower, see Page 43.

FIGURE 42-1: CONDENSATE TEE KIT FOR TOP-MOUNTED XT STEAM BLOWER

* Supplied with

condensate tee kit

Steam box

Two plastic ties*

Steam port

Condensate hose*

Tee*

5/8" ﬁ ll hose

OM-7983-XT

9. Install tee in 5/8" fill hose that was cut in Step 8.

10. Install steam cylinder (see “Installing steam cylinder” on Page 12).

FIGURE 42-2: TOP- AND REMOTE-MOUNTED XT STEAM BLOWER

Mounted on top of humidiﬁ er Mounted remotely from humidiﬁ er

Condensate returned to steam cylinder ﬁ ll hose

OM-7670

Condensate returned to open drain (condensate can also be returned to humidiﬁ er ﬁ ll cup)

One XT Series humidiﬁ er with two XT steam blowers

OM-7698

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

OM-7699

Page 47

XT steam blowersDispersion:

REMOTE MOUNTING XT STEAM BLOWER

The XT steam blower is constructed with a pitch toward the drain; however, it must be installed level and plumb for proper drainage. See the Warning.

WARNING

Standing water in XT steam blower

Make sure the XT steam blower is installed plumb. If it is not installed plumb, standing water can accumulate, which can:

• cause bacteria and mold growth, which can cause illness;

• affect XT steam blower performance;

• cause 212 °F (100 °C) water to discharge from the XT steam blower, which can cause severe personal injury.

Follow the instructions below for your wall type:

Mount the XT steam blower using the lag bolts provided. Follow the instructions below for mounting on a wood stud wall.

INSTALLATION

1. Mount spanner board on wall, spanning at least two studs, at top of XT steam blower cabinet (for the lag bolts).

2. Predrill pilot holes in spanner board, and secure XT stream blower to spanner board with lag bolts.

Note: Use the appropriate mounting methods and mounting hardware for

other wall types.

See Table 40-1 to determine clearance requirements for your application. Make sure walls, ceilings, and other obstructions are not within the non-wetting dimension, or condensation and dripping could occur (read Page 40). Provide at least 3" (76 mm) of clearance on each side of the XT steam blower for air intake.

INSTALLING BASE PLATE

The steam blower has a base plate for remote-mounted steam blower applications. The base plate isolates the hot steam box from contact. After the electrical connections are made, assemble the base plate onto the bottom of the steam blower with the screws provided.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 48

INSTALLATION

XT steam blowersDispersion:

WIRING XT STEAM BLOWERS

Make the following wiring connections between the humidiﬁ er and the XT steam blower, and tighten all terminals securely:

Fuses provided. See page "XT steam blowers" on page 40.

Connect XT steam blower fan wires to humidiﬁ er terminals 32, 33, and GRD.

Refer to the external connections diagram shipped with the XT steam blower.

PIPING CONDENSATE TO HUMIDIFIER FILL CUP

1. Remove fill cup cap from XT Series humidifier, and drill a 1/2" (13 mm) hole in fill cup cap for SDU-006E and SDU-017E condensate hose as shown in Figure 44-1.

2. Route XT steam blower condensate hose through hole in fill cup cap, and secure condensate hose in place.

Note: Make sure condensate hose has a water seal, as shown in Figure

44-2. The water seal is required to ensure condensate drainage from the XT steam blower and to keep steam from blowing out of the condensate hose.

PIPING CONDENSATE TO DRAIN

The XT steam blower condensate hose must be routed as shown in Figure 44-2. The water seal is required to ensure condensate drainage from the XT steam blower and to keep steam from blowing out of the condensate hose.

FIGURE 44-1: PIPING CONDENSATE TO HUMIDIFIER FILL CUP

Field-installed hole in ﬁ ll cup cap for remote XT steam blower

Approximate cap orientation to front of XT Series humidiﬁ er cabinet

Drill hole here for XT steam blower condensate hose

FIGURE 44-2: PIPING CONDENSATE TO DRAIN

OM-7636X

SDU-017E shown

After the water seal, run the condensate hose to an open drain. Cut the hose at a 45 degree angle on the end above the drain to permit a direct stream of water into the drain while maintaining an air gap.

The condensate hose must be installed and sized according to governing codes.

ADDITIONAL INSTRUCTIONS

See instructions for piping from XT Series humidiﬁ er to XT steam blower on pages 15 and 16.

OM-7687

Condensate hose

Plastic tie

1” (25 mm) air gap

Note: Shown with condensate to open drain. Condensate can also be returned to ﬁ ll cup through ﬁ eld-installed hole in ﬁ ll cup cap. See Figure 44-1.

7” (178 mm) water seal

Spill funnel (plumb to ﬂ oor drain)

Open ﬂ oor drain. Refer to governing codes for drain pipe size and maximum temperature requirements.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 49

Principle of operation

1. CONTROLLER RECEIVES A CALL FOR HUMIDITY

When the RH level in the humidiﬁ ed space drops below set point, the humidiﬁ er controller

receives a call for humidity and calculates a corresponding electrical current. The controller closes the contactor, which energizes the electrodes. If there is not enough water in the steam cylinder, the ﬁ ll valve opens and water enters the steam cylinder.

2. ENERGIZED ELECTRODES BOIL WATER INTO STEAM

When the water level in the steam cylinder rises to touch the electrodes, electrical current ﬂ ows

through the water between the electrodes. Electrical resistance in the water causes the water to heat up and boil into steam. The steam ﬂ ows through the steam outlet and through steam hose or tubing to the XT steam blower or dispersion assembly, where it is discharged into the airstream.

3. ELECTRICAL CURRENT INCREASES TO MEET DEMAND

As the amount of water covering the electrodes increases, current ﬂ ow increases. The ﬁ ll valve

remains open until the amperage increases to 10 percent above the current corresponding to the demand signal. Then the ﬁ ll valve closes, and the water boils into steam.

4. WATER CONTINUES TO BOIL INTO STEAM

As the water boils into steam, the amount of water covering the electrodes decreases,

and current ﬂ ow decreases. When current ﬂ ow decreases to 10 percent below the current corresponding to the demand signal, the ﬁ ll valve opens to increase the water level in the steam cylinder, which increases current ﬂ ow and steam production.

OPERATION

5. CONTROLLER INITIATES DRAIN/FILL CYCLES TO FLUSH CONDUCTIVE IONS

As steam production continues, the concentration of conductive ions in the water increases,

eventually leading to increased electrical current through the water. An algorithm monitors water conductivity and auto tunes drain and ﬁ ll cycles to keep electrical current within demand parameters. This optimizes humidiﬁ er performance based on water conditions and steam production.

The humidiﬁ er has user-selectable drain water tempering. When drain water tempering is

selected, drain water is automatically cooled before entering the drain.

WATER CONDUCTIVITY

In electrode humidiﬁ ers, steam output is directly related to the resistance of the water in the steam cylinder and, therefore, the conductivity of the water between the electrodes. Higher water levels cover more electrode surface and result in more steam; lower water levels cover less electrode surface and result in less steam. Since water conductivity and water level both correlate to steam output, DriSteem’s algorithm monitors conductivity and manages drain and ﬁ ll cycles to optimize humidiﬁ er performance and provide proper steam output.

DRAIN AND FILL CYCLES

As the water in the cylinder boils into steam, the concentration of conductive ions increases until it reaches a threshold that triggers a drain and ﬁ ll cycle. This rids the cylinder of highly conductive water and replaces it with less conductive ﬁ ll water. The more conductive the ﬁ ll water and the higher the demand, the more quickly the threshold is reached, and the more frequently the cylinder automatically drains and ﬁ lls to stay within the parameters for proper steam output.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 50

OPERATION

Principle of operation

FIGURE 46-1: XT SERIES HUMIDIFIER PRINCIPLE OF OPERATION

SAFETY FUNCTIONS

XT Series humidiﬁ ers are protected against running dry — current does not ﬂ ow if the electrodes in the steam cylinder are not submerged in water.

If the current rating exceeds 120% of nominal current, the drain valve opens automatically. As the water level drops, the current rating drops back to the nominal value.

If the current rating exceeds 120% of the nominal current after several drainage operations, the humidiﬁ er shuts down automatically.

(supply water

connection)

(drain)

Overﬂ ow

OM-7661X

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 51

Start-up checklist

Your humidiﬁ cation system may not have all of the options listed below. If an item does not apply to your system, skip to the next item.

OPERATION

WARNING

☐ Verify that humidiﬁ er, controls, piping, electrical connections, steam supply,

and dispersion units(s) are installed according to installation instructions in this manual and:

• Ladder style wiring diagram and external connections wiring diagram (inside humidiﬁ er cabinet)

• Governing codes

• Vapor-logic Installation and Operation Manual – Installation section – Pre-installation checklist

Electric shock hazard

Contact with energized circuits can cause property damage, severe personal injury or death as a result of electrical shock or ﬁ re.

Make sure cabinet doors are installed before turning on electrical power.

For proper operation of safety interlock switch, install electrical-side door ﬁ rst, then install cylinder-side door.

☐ Verify that ﬁ eld wiring is done per instructions in this manual and per unit

wiring diagram.

☐ Conﬁ rm that proper grounding and an approved earth ground are provided.

☐ Conﬁ rm that instructions in the Electric shock hazard warning have been followed.

☐ Conﬁ rm that water ﬁ ll line was thoroughly ﬂ ushed before it was connected to the humidiﬁ er.

☐ Verify that humidiﬁ er is mounted level and securely supported before ﬁ lling with water. See

operating weights in Table 6-1.

☐ Make sure cylinder is fully seated into drain valve, and verify that all electrical connections are

secure.

☐ Turn water supply on (do not use demineralized, deionized, or reverse-osmosis water) and

conﬁ rm that drain valve is closed.

If the force of air exiting water supply lines blows ﬁ ll cup cap off during ﬁ rst ﬁ ll cycle, this is not

a sign of defect or a cause for concern; simply replace ﬁ ll cup cap after all air has exited water line.

☐ Verify that humidiﬁ er is level and plumb when ﬁ lled with water.

☐ Turn power on and conﬁ rm that Model XTP keypad/display illuminates.

☐ Conﬁ rm that airﬂ ow switch is closed.

☐ If you choose not to use airﬂ ow switch: Jumper AFsw and 24vac terminals

☐ If you choose not to use on-off duct high limit: Jumper 21vdc and DHL terminals

☐ Conﬁ rm that high limit humidistat input is closed or that variable air volume (VAV) control system

high limit transmitter is connected.

☐ With sufﬁ cient water in steam cylinder, airﬂ ow switch closed, high limit humidistat closed, door

safety interlock switch closed, and a call for humidity, verify that heat outputs are activated.

☐ If you experience difﬁ culties, see “Troubleshooting” on Page 52.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 52

OPERATION

Model XTP

START-UP PROCEDURE

After the Model XTP humidiﬁ er is installed and connected properly:

WARNING

1. Perform all applicable “Start-up checklist” items on Page 47.

2. Read and follow the instructions in the “Operation” section of the Vapor-logic Installation and Operation Manual.

3. Note: During start-up, do not leave the humidifier unattended.

4. Monitor humidifier operation through multiple drain and fill cycles.

5. Perform the cleaning procedure as follows: a. Operate humidiﬁ er long enough for steam to be produced. b. Using the keypad/display:

– At the Main menu, select Tank Status, and press Enter. – Select Mode, and press Enter. – Select Drain, and press Enter. – Let steam cylinder drain for 5 to 10 minutes until empty.

c. Restart the humidiﬁ er, and repeat Steps a and b.

CAPACITY LIMITATION

Model XTP humidiﬁ er capacity can be limited to a user-speciﬁ ed maximum using the keypad/display or Web interface. From the Main menu, select Tank

Setup, then select Capacity Adjustment for menu options.

Electric shock hazard

Only qualiﬁ ed electrical personnel should perform start-up procedure.

Contact with energized circuits can cause property damage, severe personal injury or death as a result of electrical shock or ﬁ re.

Make sure cabinet doors are installed before turning on electrical power.

For proper operation of safety interlock switch, install electrical-side door ﬁ rst, then install cylinder-side door.

The Vapor-logic In stal la tion and Op er a tion Man u al is a comprehensive operation manual. Refer to it for information regarding the following features:

• Keypad/display and Web interface setup and menu information

• Control input signals and functions

• Safety features

• Alarm screens and fault messages

This manual ships with Model XTP humidiﬁ ers and is available at our website: www.dristeem.com

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 53

MAINTENANCE

Maintenance:

SCHEDULED MAINTENANCE

At 1000-hour intervals or when “Service interval reached” appears in the Messages Log, inspect the steam cylinder, ﬁ ll and drain valves, steam hose, condensate piping, water supply piping, drain piping, drain, and all other parts for proper operation and cleaning requirements. Verify proper operation of the high limit humidistat, relays, and airﬂ ow proving switch.

STEAM CYLINDER SERVICE LIFE

Steam cylinder service life depends on operating hours and water hardness. If “Check cylinder” appears in the Messages Log during and shortly after start-up, the message can be cleared and will stop repeating after a few drain and ﬁ ll cycles.

When “Check cylinder” appears in the Messages Log

Shutdown and cool-down procedures

WARNING

Shutdown procedure

To prevent severe personal injury or death from electrical shock, follow this shutdown procedure before performing service or maintenance procedures on this humidiﬁ er (after cylinder is drained and cooled):

1. Use Vapor-logic keypad/display to drain cylinder.

2. Use Vapor-logic controller keypad/display to change control mode to Standby.

3. Shut off all electrical power to humidiﬁ er using ﬁ eldinstalled fused disconnect, and lock all power disconnect switches in OFF position.

Note: Two-cylinder XT Series humidiﬁ ers have two power

supply connections.

4. Close ﬁ eld-installed manual water supply shut-off valve.

after extended operation, the humidiﬁ er will continue to run, but the cylinder must be replaced to ensure optimum output. Sure signs that a cylinder needs to be replaced are when it is approximately one-third full of minerals, or minerals have bridged between electrodes.

WARNING

To replace the steam cylinder, ﬁ rst follow the cool-down procedure below.

COOL-DOWN PROCEDURE

1. In Vapor-logic keypad/display Main menu, select Tank Status, and press Enter.

2. Select Mode, and press Enter.

3. Select Drain, and press Enter.

4. Let steam cylinder drain for 5 to 10 minutes (drain water is automatically tempered when drain water tempering is selected).

5. Close field-installed manual supply water shut-off valve, and allow cylinder to continue draining.

Hot water system

Cylinder and any undrained water may be hot. To avoid injury from hot water, follow the cool-down procedure before proceeding with maintenance.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 54

MAINTENANCE

Maintenance:

Replacing steam cylinder

1. When steam cylinder is completely empty, turn humidifier off. Place all power disconnects in OFF position, and lock in OFF position.

2. Remove cabinet doors, and make sure cylinder and humidifier components have cooled.

3. Carefully pull the electrode plugs straight up off the cylinder to ensure no damage to the plug boot occurs.

4. Inspect cylinder plugs. Obtain replacement plugs from DriSteem if deterioration, corrosion or loose fit occur.

5. Disconnect the high water sensor wire.

Note: Because of tight clearances, perform Steps 6 through 7 only if

servicing Model XTP 002 through 017 with top-mounted steam blower. For all other models, skip to Step 8.

6. Remove both clamps on steam hose that connects to cylinder and steam blower.

7. Slide steam hose from Step 6 all the way up until it is tight against bottom of steam blower. Skip to Step 9.

8. Loosen steam hose clamp, and disconnect steam hose from cylinder.

Note:

DriSteem recommends keeping a spare steam cylinder in stock during the humidiﬁ cation season. See “Replacement parts" on Pages 57 and 59.

CAUTION

If cylinder plugs become loose,

damage to the humidiﬁ er may occur. Obtain replacement plugs from DriSteem. See “Replacement parts” on Pages 57 and 59 for part numbers.

9. Place hands palms-down below cylinder on both sides of drain outlet.

10. Press up against bottom of cylinder with backs of hands while pressing down against cabinet floor with fingers.

11. Raise cylinder until drain outlet clears drain valve body and the side tabs on the cylinder have cleared the cylinder guides. Remove cylinder from cabinet.

12. Vacuum scale and debris out of drain valve port.

Note: For more thorough cleaning, see drain valve maintenance instructions

on Page 51.

13. Replace O-ring in drain valve body (new cylinder ships with new O-ring).

Make sure O-ring is correctly placed.

14. Dampen O-ring seals with water before replacing cylinder. Do not use

lubricant or other substance.

15. Install new steam cylinder. See “Installing steam cylinder” on Page 12.

16. Connect steam hose to cylinder, and re-install hose clamp.

17. Connect high water sensor (yellow) wire to single pin surrounded by plastic shoulder on cylinder.

18. Connect electrode wires to pins on top of cylinder. Make sure all plugs fit snugly and are fully engaged on pins.

Important: Three phase cylinders have color-coded dots on the cylinder

If returning humidiﬁ er to operation, see the start-up procedure on page 48.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 55

MAINTENANCE

Maintenance:

DRAIN VALVE

Drain valve

If either of the following issues occur after several months of runtime, follow the drain valve maintenance procedures below.

• Drain valve is closed, but draining and ﬁ lling continue.

• End of cylinder life prompt appears prematurely.

DRAIN VALVE BODY MAINTENANCE

1. When steam cylinder is empty, turn humidifier off. Place all power disconnects in OFF position, and lock in OFF position. See Figure 51-1.

2. Remove cabinet doors and steam cylinder (see Page 10).

3. Vacuum loose scale and debris out of the drain valve port.

4. Disconnect 2-pin Molex plug from 24 VAC drain valve coil.

5. Slide cap (A) off of drain valve coil (C).

6. Turn hex nut (B) counter-clockwise. Loctite on nut will cause drain valve coil assembly to turn out of drain valve body (G). Remove coil/actuator assembly from drain valve body. Make sure spring (E) and plunger (F) do not fall out of actuator (D).

7. Clean plunger (F), spring (E), actuator (D), and plastic drain valve body (G) with clean water.

8. Reassemble drain valve. When threading actuator (D) into drain valve body (G), make sure it is not cross threaded. Torque actuator into drain valve body to 18 in-lb (2.0 N·m).

FIGURE 51-1: DRAIN VALVE ASSEMBLY

Drain valve body

Drain valve coil

Drain cup plate

Insert

Ground plate

Drain cup

Notes:

• Pay close attention to all parts shown above. Verify that ground plate is in groove of drain cup, and insert is in place through ground plate loop.

• Failure to get ground plate and insert solidly connected to frame will compromise ground safety circuit.

O-ring

OM-7630

9. Plug Molex plug into its mating wire harness plug, and slide cap (A) onto drain valve coil (C).

10. See “Start-up procedure” on Page 48 if returning humidifier to operation.

Note: If the procedure above did not resolve drain valve issues, perform the

drain valve assembly maintenance procedure on Page 52.

FIGURE 51-2: DRAIN VALVE BODY

Drain valve body (G)

Plunger (F)

Spring (E)

Drain valve coil (C) Actuator (D) Torque to 18 in-lb (2.0 N·m)

Wires to Molex plug

Nut (B)

Cap (A)

OM-7631

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 56

MAINTENANCE

Troubleshooting

DRAIN VALVE ASSEMBLY MAINTENANCE

Perform the following procedure only if the procedure on Page 51 does not resolve drain valve issues. See Figure 51-2.

1. Perform Steps 1 through 4 on Page 51.

2. Remove the three screws and washers securing drain cup plate to drain cup.

3. Lift drain valve body/plate assembly off of drain cup.

4. Vacuum loose scale and debris out of drain cup.

5. Remove ground plate, and clean scale and debris from ground plate and outlet of drain valve body.

6. Reassemble drain valve assembly: Fit mounting screws with washers, insert them through drain cup plate, and tighten them into drain cup. See notes in Figure 51-2.

7. Clean end of hose, and reconnect it to drain valve body with hose clamp. Plug Molex plug into its mating wire harness plug.

8. See “Start-up procedure” on Page 48 if returning humidifier to operation.

MODEL XTP TROUBLESHOOTING

Follow the procedure below to resolve issues with Model XTP humidiﬁ ers:

DriSteem Technical Support

Have the following information ready when calling Technical Support. See phone number inside front cover of this manual.

Humidiﬁ er model number

_______________________________

Humidiﬁ er serial number

_______________________________

When issue began

_______________________________

Issue description

_______________________________

1. Review possible causes and recommended actions in Table 54-1.

2. Follow the Test mode procedure beginning on Page 56.

The Test mode procedure is intended to check the general function of Model

XTP humidiﬁ ers and components, and to help diagnose and resolve general operational problems.

3. If Table 54-1 and the Test mode procedure do not help you solve the issue, call DriSteem (see inset at right) with the following information available:

• Humidiﬁ er model number and serial number (see nameplate on side of

the humidiﬁ er and steam blower)

• Issue description Example: water leaking, low humidity, high humidity, etc.

• When issue began Example: After maintenance, cylinder replacement, etc.

• System changes Example: Pressure, new service, new controller, relocation, change in

maintenance, etc.

_______________________________

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 57

Troubleshooting

Table 53-1: Model XTP humidifier troubleshooting guide

Problem Possible cause Action

Check L1, N/L2 and Ground connections.

Humidiﬁ er will not turn on

Steam light does not turn on.

Water constantly runs down drain.

Water is leaking from humidiﬁ er.

Humidiﬁ er makes gurgling sound.

Fill valve makes banging sound.

Humidiﬁ er will not ﬁ ll.

Humidiﬁ er will not drain.

Field-wired terminal connections

Internal connections

No power to humidiﬁ er

Humidiﬁ er not turned on Make sure front cover is attached to engage safety interlock switch. Press On-off button.

No power to 24V control circuit

Call for humidity not being received

Malfunctioning drain valve. Check valve function using Test Mode.

Debris in drain valve preventing it from closing

O-ring in drain valve not properly seated in groove

Water ﬂ owing from ﬁ ll cup overﬂ ow port

Loose plumbing connections

Excess condensate in steam hose

Water hammer from line pressure

Field-installed supply water shutoff valve not open

Malfunctioning ﬁ ll valve Check valve function using Test mode.

Debris in drain valve blocking outlet port

Malfunctioning drain valve Check valve function using Test mode.

Check wiring connections and settings on accessory items such as high limit switch and airﬂ ow proving switch.

Follow the shutdown procedure on Page 50, then make sure electrode and high water probe connections on top of cylinder are securely connected.

Make sure ribbon cable from membrane switch is securely plugged into control circuit board.

Check that terminals from internal components are securely attached to proper tabs on circuit boards.

Make sure one of the electrode wires extends through toroid ring on current sensing circuit board.

Check main power supply and switch.

Check for proper voltage across L1 and N/L2 terminals.

Make sure ribbon cable from membrane switch is securely plugged into control circuit board.

Check reset switch on transformer.

Check that the transformer line fuses (2) are in place and conductive.

Check wiring and settings of high RH limit switch and airﬂ ow proving switch.

Remove cylinder, and clean debris from drain valve.

Remove cylinder, and reposition O-ring.

Check internal hoses, and remove kinks or blockage.

Check supply water connection at ﬁ ll valve inlet. Tighten as needed.

Check internal hose clamp connections. Reposition clamps and tighten as needed.

Check steam hose connection on top of cylinder. Tighten clamp as needed.

Make sure steam hose has constant downward slope to humidiﬁ er or to tees and traps in low spots of hose.

Make sure water supply line does not contact ductwork.

Install shock arrestor.

Install section of 1/4" braided ﬁ ll line. Conform to governing codes.

Open valve.

Remove cylinder and clean debris from drain valve.

MAINTENANCE

Continued

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 58

MAINTENANCE

Troubleshooting

Table 53-1: Model XTP humidifier troubleshooting guide (continued)

Problem Possible cause Action

Dispersion tube installed

Water in duct from dispersion tube.

Service light ﬂ ashing red before end of humidiﬁ cation season.

incorrectly

Impurities in steam hose or tubing causing foaming

Cylinder full of mineral deposits

Install dispersion tube with tubelets facing straight up.

Rinse cylinder and hose in clean water.

Plumb humidiﬁ er to ﬁ ltered water.

Plumb humidiﬁ er to softened water.

Steam light is yellow.

Humidiﬁ er is not satisfying demand.

Excess humidity.

Humidiﬁ er operating below rated capacity

Notes:

• This is normal for systems plumbed to low-conductivity water and systems that operate for short cycles.

• XT Series humidiﬁ er recommended ﬁ ll water conductivity is 125 to 1250 μS/cm.

Control setting too low Adjust control to higher setting.

Control mounted in wrong location

Control setting too high Adjust control to lower setting.

Control mounted in wrong location

Plumb humidiﬁ er to softened water.

To determine operating current, attach clamp-on ammeter to one of the electrode wires on top of cylinder.

Add add 1/4 to 1/2 tab sodium bicarbonate (i.e., Alka Seltzer) to water in cylinder increase water conductivity. Consult DriSteem for further advice.

See installation instructions with control for correct mounting location.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 59

Troubleshooting

MAINTENANCE

MODEL XTP TROUBLESHOOTING

Follow the procedure below to resolve issues with Model XTP humidiﬁ ers:

1. Review possible causes and recommended actions in the Troubleshooting guide in the Vapor-logic In stal la tion and Op er a tion Man u al.

2. If the Troubleshooting guide does not help you solve the issue, call DriSteem with the following information available:

• Humidiﬁ er model number, serial number, and ﬁ rmware version (see

nameplate on side of the humidiﬁ er and steam blower)

To access ﬁ rmware version: Keypad/display: Select Diagnostics in the Main menu, select Humidiﬁ er

info, scroll down to Firmware version.

Web interface: Click Diagnostics in the toolbar, click Humidiﬁ er info, see

Firmware version below.

• When issue began Example: Always, after remodel, after a change in weather, etc.

• Issue description Example: water leaking, low humidity, high humidity, etc.

• System changes Example: Pressure, new service, new controller, relocation, change in

maintenance, etc.

DriSteem Technical Support

Have the following information ready when calling Technical Support. See phone number inside front cover of this manual.

Humidiﬁ er model number

_______________________________

Humidiﬁ er serial number

_______________________________

Firmware version

_______________________________

When issue began

_______________________________

Issue description

_______________________________

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 60

MAINTENANCE

Replacement parts

FIGURE 56-1: MODELS XTP 002 THROUGH 048 REPLACEMENT PARTS

OM-7985

Subpanel

SDU option

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

OM-7703

Euro subpanel

OM-8002

Page 61

Replacement parts

Table 57-1: Models XTP 002 through 048 replacement parts

Item Description Part No.

Transformer, 120V, 24V SEC - QC 408965-101

Transformer, 208/240/480V, 24V SEC - QC 408965-102

Transformer, 277V, 24V SEC - QC 408982-101

Transformer, 600V, 24V SEC - QC 408986-101

Transformer, 230/400, 24V SEC - QC 408985-101

2 Contactor 407010-*

3 Plug, high water sensor 530010-105

MAINTENANCE

Board, current sensing, 208/230/240/277 V (Model XTP 002)

Board, current sensing, 400/480 V 530013-002

Board, current sensing, 600 V 530013-003

Board, current sensing, 208/230/240/277/400 V 530013-004

5 Display board, Vapor-logic controller 408495-004

6 Main board, Vapor-logic controller 183504-004

7 Kit, electrode wiring (plugs/wires: 1 red, 1 black, 1 white) 194625-001

8* Kit, cylinder 194601-*

9 Strainer, cylinder 531006

10 Drain valve assembly (see parts in Figure 51-1) 194610-001

Fill valve assembly Models XTP 002 and 017 194623-001

Fill valve assembly Models XTP 025 through 096 194623-002

12 Kit, ﬁ ll cup extension (see parts in Figure 11-1) 194605-101

13 Fuse 2A 600V ATM 406740-014

14 Switch interlock with override 530010-102

Fuse 40A 480V AG (XTP 042, 480 volt only) 406720-040

Fuse 50A 480V AG (XTP 048, 480 volt only) 406720-050

530013-001

16 Switch auxiliary GE ECLA211S 407001-024

See cylinder Part No. on your XT Series humidiﬁ er.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 62

MAINTENANCE

Replacement parts

FIGURE 58-1: MODELS XTP 050 THROUGH 096 REPLACEMENT PARTS

Subpanel

OM-7704

Euro Subpanel

OM-7705

OM-8003

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 63

Replacement parts

Table 59-1: Models XTP 050 through 096 replacement parts

Item Description Part No.

Transformer, 120V, 24V SEC - QC 408965-101

Transformer, 208/240/480V, 24V SEC - QC 408965-102

Transformer, 277V, 24V SEC - QC 408982-101

Transformer, 600V, 24V SEC - QC 408986-101

Transformer, 230/400, 24V SEC - QC 408985-101

2 Contactor 407010-*

3 Plug, high water sensor 530010-105

Board, current sensing, 400/480 V 530013-002

Board, current sensing, 600 V 530013-003

Board, current sensing, 208/230/240/277/400 V 530013-004

MAINTENANCE

Board, current sensing, 230/400 V (Model XTP096 only) 530013-005

5 Display board, Vapor-logic controller 408495-004

6 Main board, Vapor-logic controller 183504-014

Kit, electrode wiring (plugs with wires: 1 red, 1 black, 1 white)

Kit, electrode wiring, extended (plugs with wires: 1 red, 1 black, 1 white)

Kit, cylinder, XT-75/150, XT-025/050, 380V, 3P 194601-023

Kit, cylinder, XT-75/150, XT-025/050, 400-600V, 3P 194601-025

Kit, cylinder, XT-100/200, XT-033-096, 380/400V, 3P 194601-026

Kit, cylinder, XT-100/200, XT-033-096, 480/600V, 3P 194601-028

9 Strainer, cylinder 531006

10 Drain valve assembly (see parts in Figure 51-1) 194610-001

11 Fill valve assembly Models XTP 025 through 096 194623-002

12 Kit, ﬁ ll cup extension (see parts in Figure 11-1) 194605-101

13 Fuse 2A 600V ATM 406740-014

14 Switch interlock with override 530010-102

Fuse 40A 480V AG (XTP 083, 480 volt only) 406720-040

Fuse 50A 480V AG (XTP 096, 480 volt only) 406720-050

194625-001

194625-002

16 Switch auxiliary GE ECLA211S 407001-024

See cylinder Part No. on your XT Series humidiﬁ er.

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Page 64

MAINTENANCE

Replacement parts

FIGURE 60-1: SDU-006E AND SDU-017E STEAM BLOWERS

OM-7700

Table 60-1: SDU-006E and SDU-017E steam blowers

Item Description Part No.

Fan, SDU-006E, 120V 407109-002

Fan, SDU-017E, 230V 306377

Fan, SDU-006E, 230V 407109-102

Fan, SDU-017E, 120V 306376

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Accessories

Table 61-1: Accessories

Description Part No.

Steam hose, 1" (DN25) x 10' (3 m), for remote XT steam blower 305400-100

Steam hose, 1½" (DN40) x 10' (3 m), wire-reinforced 305400-010

Steam hose, 2" (DN50) x 10' (3 m), wire-reinforced 305560-0010

Condensate hose, 1/4" (DN8) x 13' (4 m), for remote XT steam blower 305400-150

Drain hose cuff, 1" (DN25) I.D. x 12" (305 mm) long 305389-012

Hose clamp, 1" (DN25) I.D. 700560-100

Hose clamp, 23 mm, spring band 700560-023

Hose clamp, 19 mm, spring band 700560-019

Hose clamp, 1½" (DN40) I.D. 700560-150

Hose clamp, 2" (DN50) I.D. 700560-200

Kit, drip tee, 304 stainless steel, 1½" (DN40) 191071-001

Humidistat, duct high limit, HC-201 405850-201

Humidistat, room, HC-101 405870

Humidity transmitter, duct, 2% RH DSB 405884-009

Humidity transmitter, room, 2% RH 405883-008

Switch, airﬂ ow, AFS-112-150, electric 406190

Kit, Y connector; Models XTP 033, 042, and 048 (see Figure 24-1)

• 1 Y connector, stainless steel, 1½" x 2" (DN40 x DN50)

191070-101• 2 steam hoses, 1½"(DN40), 12" (305 mm) long

• 4 hose clamps

Kit, Y/tube connectors; Models XTP067 through 096 (see Figure 24-1)

• 2 Y connector kits 191070-101

• 1 ﬂ anged tube connector, stainless steel, 3" (DN80) 162825-202F

Kit, tube connector; Model XTP050 (see Figure 24-1)

• 1 tube connector, stainless steel, 1½" x 2" (DN40 x DN50)

191070-002• 1 hose cuff, 2" (DN50), 6" (152 mm) long

• 2 hose clamps

Kit, tube reducer; Models XTP 002 through 006 (see Figure 23-1)

• 1 tube reducer, stainless steel, 1" x 1½" (DN25 x DN40)

191070-100• 1 steam hose, 1" (DN25), 12" (305 mm) long

• 2 hose clamps

Kit, tube Y connector; Model XTP 025 (see Figure 23-1)

• 1 Y connector, 1.5" x 1.5" x 1.5"(DN40 x DN40 x DN40)

191070-102• 1 steam hose, 1.5" (DN40), 12" (305 mm) long

• 2 hose clamps

MAINTENANCE

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Notes

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Notes

XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

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ARRANTY

Expect quality from the industry leader

For more than 45 years, DriSteem has been leading the industry with creative and reliable humidiﬁ cation solutions. Our focus on quality is evident in the construction of the XT Series humidiﬁ er. DriSteem also leads the industry with a Two-year Limited Warranty and optional extended warranty.

For more information

www.dristeem.com sales@dristeem.com

For the most recent product information visit our Web site: www.dristeem.com

DRI-STEEM Corporation

a subsidiary of Research Products Corporation DriSteem U.S. operations are ISO 9001:2015 certiﬁ ed

U.S. Headquarters: 14949 Technology Drive Eden Prairie, MN 55344 800-328-4447 or 952-949-2415 952-229-3200 (fax)

TWO-YEAR LIMITED WARRANTY

DRI-STEEM Corporation (“DriSteem”) warrants to the original user that its products will be free from defects in materials and workmanship for a period of two (2) years after installation or twentyseven (27) months from the date DriSteem ships such product, whichever date is the earlier. If any DriSteem product is found to be defective in material or workmanship during the applicable warranty period, DriSteem’s entire liability, and the purchaser’s sole and exclusive remedy, shall be the repair or replacement of the defective product, or the refund of the purchase price, at DriSteem’s election. DriSteem shall not be liable for any costs or expenses, whether direct or indirect, associated with the installation, removal or reinstallation of any defective product. The Limited Warranty does not include cylinder replacement for electrode steam humidiﬁ ers or media replacement for Wetted Media Systems.

DriSteem’s Limited Warranty shall not be effective or actionable unless there is compliance with all installation and operating instructions furnished by DriSteem, or if the products have been modiﬁ ed or altered without the written consent of DriSteem, or if such products have been subject to accident, misuse, mishandling, tampering, negligence or improper maintenance. Any warranty claim must be submitted to DriSteem in writing within the stated warranty period. Defective parts may be required to be returned to DriSteem. Excluded from the Limited Warranty are all consumable and wear and tear items such as cylinders, membranes, ﬁ lters, or media replacements. These items are subject to usual wear and tear during usage.

DriSteem’s Limited Warranty is made in lieu of, and DriSteem disclaims all other warranties, whether express or implied, including but not limited to any IMPLIED WARRANTY OF MERCHANTABILITY, ANY IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE, any implied warranty arising out of a course of dealing or of performance, custom or usage of trade. DriSteem SHALL NOT, UNDER ANY CIRCUMSTANCES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, LOSS OF PROFITS, REVENUE OR BUSINESS) OR DAMAGE OR INJURY TO PERSONS OR PROPERTY IN ANY WAY RELATED TO THE MANUFACTURE OR THE USE OF ITS PRODUCTS. The exclusion applies regardless of whether such damages are sought based on breach of warranty, breach of contract, negligence, strict liability in tort, or any other legal theory, even if DriSteem has notice of the possibility of such damages.

By purchasing DriSteem’s products, the purchaser agrees to the terms and conditions of this Limited Warranty.

European ofﬁ ce: Marc Briers Grote Hellekensstraat 54 b B-3520 Zonhoven Belgium +3211823595 (voice) +3211817948 (fax) E-mail: marc.briers@dristeem.com

Continuous product improvement is a policy of DriSteem Corporation; therefore, product features and speciﬁ cations are subject to change without notice.

DriSteem, Rapid-sorb, Ultra-sorb, Vapor-logic are registered trademarks of Research Products Corporation and are ﬁ led for trademark registration in Canada and the European community.

Product and corporate names used in this document may be trademarks or registered trademarks. They are used for explanation only without intent to infringe.

EXTENDED WARRANTY

The original user may extend the term of the DriSteem Limited Warranty for a limited number of months past the initial applicable warranty period and term provided in the ﬁ rst paragraph of this Limited Warranty. All the terms and conditions of the Limited Warranty during the initial applicable warranty period and term shall apply during any extended term. An extended warranty term of an additional twelve (12) months or twenty four (24) months of coverage may be purchased. The extended warranty term may be purchased until eighteen (18) months after the product is shipped, after which time no extended warranties are available. When a Dristeem humidiﬁ er is purchased with a DriSteem RO system, an extended twenty-four (24) month coverage is included.

Any extension of the Limited Warranty under this program must be in writing, signed by DriSteem, and paid for in full by the purchaser.

Form No. XT-IOM-EN-1218 Part No. 890000-139 Rev H