DriSteem XT, XT-5, XT-10, XT-20, XT-30 Installation, Operation And Maintenance Manual

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Page 1

Electrode Steam Humidifier

Installation, Operation,

and Maintenance Manual

Page 2

Warnings and cautions

WARNING

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

mc_051508_1145

WARNING

Attention installer

Read this manual before installing, and leave this manual with product owner. This product must be installed by qualiﬁed HVAC and electrical contractors and in compliance with local, state, federal, and governing codes. Improper installation can cause property damage, severe personal injury, or death as a result of electric shock, burns, or ﬁre.

DRI-STEEM

technical support: 800-328-4447

Read all warnings and instructions

Read this manual before performing service or maintenance procedures on any part of the system. Failure to follow all warnings and instructions could produce the hazardous situations described, resulting in property damage, personal injury, or death.

Failure to follow the instructions in this manual can cause moisture to accumulate, which can cause bacteria and mold growth or dripping water into building spaces. Dripping water can cause property damage; bacteria and mold growth can cause illness.

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Hot surfaces and hot water

This steam humidiﬁcation system has extremely hot surfaces. Water in steam cylinders, steam pipes, and dispersion assemblies can be as hot as 212 °F (100 °C). Discharged steam is not visible. Contact with hot surfaces, discharged hot water, or air into which steam has been discharged can cause severe personal injury. To avoid severe burns, follow the cool-down procedure in this manual before performing service or maintenance procedures on any part of the system.

CAUTION

Indicates a hazardous situation that could result in damage to or destruction of property if instructions are not followed.

Page ii • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 3

Warnings and cautions

WARNING

Disconnect electrical power

Disconnect electrical power before installing supply wiring or performing service or maintenance procedures on any part of the humidiﬁcation system. Failure to disconnect electrical power could result in ﬁre, electrical shock, and other hazardous conditions. These hazardous conditions could cause property damage, personal injury, or death.

Contact with energized circuits can cause property damage, severe personal injury, or death as a result of electrical shock or ﬁre. Do not open control cabinet or remove heater terminal or subpanel access panels until electrical power is disconnected.

Follow the shutdown procedure in this manual before performing service or maintenance procedures on any part of the system.

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Electrical shock hazard

If the humidiﬁer starts up responding to a call for humidity during maintenance, severe bodily injury or death from electrical shock could occur. To prevent such start-up, follow the procedure below before performing service or maintenance procedures on this humidiﬁer:

1. Use Vapor-logic

2. Use Vapor-logic

4 keypad/display to drain the cylinder.

4 keypad/display to change control mode to Standby.

3. Shut off all electrical power to humidiﬁer using ﬁeld-installed fused disconnect, and lock all power disconnect switches in OFF position.

4. Close ﬁeld-installed manual water supply shut-off valve.

mc_050808_1540

CAUTION

Hot discharge water

Discharge water can be as hot as 212 °F (100 °C) and can damage the drain plumbing.

Humidiﬁers equipped with a water tempering device need fresh make-up water in order to function properly. Make sure the water supply to the water tempering device remains open during draining.

If the humidiﬁer is not equipped with a water tempering device, allow the tank to cool before opening the drain valve.

Excessive supply water pressure

Supply water pressure greater than 80 psi (550 kPa) can cause the humidiﬁer to overﬂow.

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page iii

Page 4

Table of contents

Warnings and cautions ................................ii

Overview

Product overview .......................................2

Specifications, capacities and weights .....................4

Fusing and line currents ................................. 5

Dimensions ............................................6

Installation

Selecting a location .....................................7

Mounting:

Keyhole locations and dimensions ...................... 8

Clearances ...........................................9

Opening and closing cabinet doors .....................10

Removing cabinet doors ..............................10

Removing steam cylinder .............................10

Wall mounting humidifier ............................10

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

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

Condensate return guidelines ............................12

Piping:

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

XT models 5 through 100 ............................14

XT models 150 and 200 ..............................15

XT steam blowers ....................................16

Humidifier wiring .....................................19

Humidistat and transmitter placement Dispersion:

Selecting the dispersion assembly location ..............23

Interconnecting piping requirements

Connecting to humidifier with steam hose ...........24

Connecting to humidifier with tubing or pipe ........25

Drip tee installation ..................................28

Single dispersion tube ................................29

Rapid-sorb

Pitch requirements ................................33

Header outside of duct, horizontal airflow ...........34

Header inside of duct, horizontal airflow ............36

Steam supply connections to Rapid-sorb header ......38

Condensate drain connections to Rapid-sorb header . . 38

Ultra-sorb Model LV or LH ...........................38

XT steam blowers

Mounting XTSB on top of humidifier ...............41

Wiring top-mounted XTSB ........................41

Wall mounting XTSB .............................42

Wiring wall-mounted XTSB .......................43

Installing base plate ...............................43

Piping condensate to XT humidifier fill cup cap ......43

Piping condensate to drain .........................43

....................22

Page iv • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 5

Table of contents

Operation

Supply water considerations .............................44

Principle of operation ..................................46

Staging multiple XT humidifiers .........................46

Components ..........................................47

Start-up procedure .....................................48

Start-up checklist ......................................49

Maintenance

Scheduled maintenance ................................50

Steam cylinder .........................................50

Drain valve ............................................52

Troubleshooting ......................................53

DRI-STEEM Technical Support .........................53

Replacement parts:

XT humidifier models 5 through 100 ...................54

XT humidifier models 150 and 200 ....................56

Steam blowers XTSB-20 and XTSB-50 .................. 58

Warranty ................................... Back cover

Controller

The

Vapor-logic®4 Installation and Operation

Manual

ships with XT humidifiers. It is a comprehensive manual. Refer to it for information about the keypad/display and Web interface, and for troubleshooting information.

Download DRI-STEEM literature

DRI-STEEM product manuals can be downloaded, printed, and ordered from our web site: www.dristeem.com

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 1

Page 6

Overview

Product overview

Figure 2-1: Vapor-logic controller interfaces

Keypad/display

Room RH

Mode

Softkeys

for direct

access

Navigation

buttons for item

selection

Web interface

Set point

Output

Cylinder status

System alarms

System messages

Figure 2-2: XT humidifier installation overview

Duct

Rapid-sorb

dispersion panel

Steam hose, tubing,

or pipe to duct dispersion

or XT steam blower (XTSB)

Fill cup extension kit

required for some

models and applications

(see Page 11)

Wall mounting

keyholes

(behind cabinet)

Electrical knockouts

Vapor-logic4 keypad/display

Condensate to drain

Notes:

See Pages 14 and 15 for detailed installation drawings.

Damage caused by chloride corrosion is not covered by your DRI-STEEM warranty.

Water ﬁll line connection

(under cabinet)

Replaceable steam cylinder

OM-7586

Supply water

XT electrode steam humidifiers use hard or softened supply water. Water conductivity must be in the range of 125 to 1250 μS/cm (roughly equivalent to 3.4 to 36.3 grains per gallon). See “Supply water considerations” on Page 44.

Demineralized, deionized, and reverse-osmosis water cannot be used, because they are not conductive enough for electrode steam humidifiers.

Heated supply water cannot be used, because unheated supply water is required for drain water tempering.

Page 2 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 7

Product overview

Overview

Dispersion options

In addition to Rapid-sorb dispersion shown in Figure 2-2, the duct dispersion options below and the open space dispersion options in Figure 3-3 are available for XT humidifiers. See “Dispersion” beginning on Page 23.

Figure 3-1: Ultra-sorb Model LV or LH dispersion

Model LV shown

Figure 3-3: XT steam blowers (XTSB)

Mounted on top of humidiﬁer

OM-7596

Mounted up to 10' (3 m) away from humidiﬁer

Figure 3-2: Single dispersion tube

Note: Models XT-30 and larger require condensate drain when using 1½“

(DN40) pipe or hose.

OM-7587X

OM-7585

OM-7597

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 3

Page 8

Overview

Table 4-1: XT humidifier specifications

Specifications, capacities and weights

Current draw (amps)

Max. steam

model kW

5 1.7 5 2.3 14.2 8.2 7.4 7.1 — — — — — — — — 47.2 21.4 46.3 21.0

10 3.4 10 4.5 — 16.3 14.8 14.2 12.3 7.1 5.7 9.4 8.2 4.9 4.1 3.3 47.2 21.4 46.3 21.0

20 6.7 20 9.1 — 32.2 29.1 27.9 24.2 14.0 11.2 18.6 16.1 9.7 8.1 6.4 48.1 21.8 54.0 24.5

30 10.1 30 13.6 — ——————28.0 24.3 14.6 12.1 9.7 62.2 28.2 87.5 39.7

50 16.8 50 22.7 — ——————46.6 40.4 24.2 20.2 16.2 62.2 28.2 87.5 39.7

75 25.1 75 34.0 — ————————36.2 30.2 24.2 75.2 34.1 124.3 56.4

100 33.5 100 45.4 — ————————48.4 40.3 32.2 75.2 34.1 124.3 56.4

capacity

lbs/hr kg/h 120V 208V 230V 240V 277V 480V 600V 208V 240V 400V 480V 600V lbs kg lbs kg

Single-phase Three-phase

Shipping

weight

Max.

operating

weight

150 50.3 150 68.1 — ————————72.6 60.5 48.4 129.2 58.6 242.9 110.2

200 67.0 200 90.8 — ————————96.7 80.6 64.5 129.2 58.6 242.9 110.2

Note: For circuit protection requirements, see Table 5-1.

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Page 4 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 9

Fusing and line currents

Table 5-1: Recommended fusing and line currents for XT humidifiers

Model Phase Volts

XT-5 1

XT-10

XT-20

XT-30 3

XT-50 3

XT-75 3

XT-100 3

XT-150 3

XT-200 3

mc_110110_1457

120 14.2 14.2 — 1.7 25

208 8.2 8.2 — 1.7 15

230 7.4 7.4 — 1.7 13

240 7.1 7.1 — 1.7 15

208 16.3 16.3 — 3.4 25

230 14.8 14.8 — 3.4 25

240 14.2 14.2 — 3.4 25

277 12.3 12.3 — 3.4 20

480 7.1 7.1 — 3.4 15

600 5.7 5.7 — 3.4 10

208 9.4 9.4 9.4 3.4 15

240 8.2 8.2 8.2 3.4 15

400 4.9 4.9 4.9 3.4 13

480 4.1 4.1 4.1 3.4 10

600 3.3 3.3 3.3 3.4 10

208 32.2 32.2 — 6.7 50

230 29.1 29.1 — 6.7 50

240 27.9 27.9 — 6.7 45

277 24.2 24.2 — 6.7 40

480 14.0 14.0 — 6.7 25

600 11.2 11.2 — 6.7 20

208 18.6 18.6 18.6 6.7 30

240 16.1 16.1 16.1 6.7 25

400 9.7 9.7 9.7 6.7 16

480 8.1 8.1 8.1 6.7 15

600 6.4 6.4 6.4 6.7 10

208 28.0 28.0 28.0 10.1 45

240 24.3 24.3 24.3 10.1 40

400 14.6 14.6 14.6 10.1 25

480 12.1 12.1 12.1 10.1 20

600 9.7 9.7 9.7 10.1 15

208 46.6 46.6 46.6 16.8 70

240 40.4 40.4 40.4 16.8 70

400 24.2 24.2 24.2 16.8 40

480 20.2 20.2 20.2 16.8 35

600 16.2 16.2 16.2 16.8 25

400 36.2 36.2 36.2 25.1 63

480 30.2 30.2 30.2 25.1 50

600 24.2 24.2 24.2 25.1 40

400 48.4 48.4 48.4 33.5 80

480 40.3 40.3 40.3 33.5 70

600 32.2 32.2 32.2 33.5 50

400 72.6 72.6 72.6 50.3 125

480 60.5 60.5 60.5 50.3 100

600 48.4 48.4 48.4 50.3 80

400 96.7 96.7 96.7 67.0 150

480 80.6 80.6 80.6 67.0 125

600 64.5 64.5 64.5 67.0 100

L1 L2 L3

Line amps

Overview

Recommended

fusing amps

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 5

Page 10

Overview

Dimensions

Figure 6-1: XT humidifier dimensional drawings

Labeled dimensions: inches (millimeters). See mounting dimensions and electrical knockouts in Figure 8-1.

Top

Front

Bottom

2.00 (51)

Dispersion outlet

Water ﬁll line connection

1.38 (34.9)

XT models 5 through 100

2.00 (51)

(254)

2.38

(60.3)

(102.9)

XT models 150 and 200

Top

Fill cup extension kits*

Front

Bottom

1.85 (47)

10 (254)

Water ﬁll line connection

6.1 (155)

1.38 (35)

17.4 (442)

4.1

2.05

(52.1)

3.05 (77.5)

Fill cup extension kit*

Drain outlet

Electrical knockouts

3.05 (77.5)

2.05 (52.1)

4.05 (102.9) OM-7581

32.2 (818)

26.8 (681)

22.09 (561)

26.38 (670)

32.2 (818)

1.85 (47)

Dispersion outlets

Drain outlets

2.36 (60)

OM-7593

* Fill cup extension kit is required for XT humidiﬁer models 75 through 200 (ships loose with these models), for all XT humidiﬁers using Rapid-sorb or Ultra-sorb

dispersion, and for all XT humidiﬁers with more than 20' (6 m) maximum developed length of tubing/pipe from humidiﬁer to dispersion assembly.

mc_090710_0946

Table 6-1: Dimensions by model number

XT models

Dimension Description

A Cabinet width 16.06 408 19.21 488 21.46 545 39.76 1010

B Cabinet height 23.94 608 25.83 656 27.99 711 27.99 711

C Cabinet depth including doors 12.05 306 14.09 358 16.89 429 16.97 431

D Cabinet depth not including doors 10.00 254 11.80 300 14.40 184 14.40 184

E Cabinet left edge to steam/drain outlet centers 4.61 117 6.22 158 7.20 183 7.24 184

F Cabinet back edge to steam/drain outlet centers 6.14 156 6.18 157 7.24 184 7.24 184

mc_091010_0920

Page 6 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

5, 10, and 20 30 and 50 75 and 100 150 and 200

inches mm inches mm inches mm inches mm

Page 11

Selecting a location

Installation

Humidifier

When selecting a location for the humidifier, consider the following:

• Proximity to the duct

Install the humidifier near the air duct system where the dispersion assembly will be located. The maximum recommended length for steam hose connecting a single humidifier to a dispersion assembly is 10' (3 m). The maximum recommended developed length for tubing or pipe connecting a single humidifier to a dispersion assembly is 20' (6 m).

For more information about installing dispersion assemblies, see “Dispersion” beginning on Page 23.

• Elevation of the installed dispersion assembly

The recommended installation location for the dispersion assembly is at an elevation higher than the humidifier. However, if the dispersion assembly must be installed at an elevation lower than the humidifier, install a drip tee and drain. See “Drip tee installation” on Page 28.

Before installing a dispersion assembly or interconnecting piping, review all pitch requirements in the “Dispersion” section of this manual.

Important:

Install humidifier only in locations that meet the following temperature and relative humidity (RH) requirements:

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

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

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

• Required clearances (see Figure 9-1)

• Electrical connections

Electrical power supply connections are at the lower or upper right rear corner of the unit. See “Humidifier wiring” on Pages 19 and 20.

• Supply water and drain piping connections

Water supply piping and drain connections are at the bottom of the cabinet. See “Piping” on Pages 14 and 15.

• Exterior wall insulation

Install the humidifier on an exterior wall only if the wall is properly insulated.

Dispersion control devices

See Figure 22-1 for recommended installation locations for the dispersion assembly and associated control devices.

mc_062810_0928-NA

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 7

Page 12

Installation

Figure 8-1: XT humidifier mounting keyhole locations

XT models 5 through 100 XT models 150 and 200

Ø N

Mounting: Keyhole locations and dimensions

Ø N

mc_091010_0923

Ø O

OM-7582

Table 8-1: XT humidifier mounting keyhole dimensions

XT models

Dimension

A 5.00 127 8.15 207 9.62 244 8.00 203

B 16.52 420 18.12 460 20.24 514 19.27 489

C 3.60 91 3.60 91 4.39 112 4.95 126

D — — — — 6.39 162 2.54 65

E 0.97 25 1.33 34 1.33 34 2.73 69

F 6.40 163 6.40 163 6.40 163 6.19 157

G — — — — 0.80 20 16.00 406

H 1.88 48 1.88 48 1.88 48 — —

I 1.63 41 1.63 41 1.63 41 1.70 43

J 2.06 52 2.06 52 2.11 54 13.10 333

K 4.06 103 4.06 103 4.11 104 38.09 967

L 7.89 200 9.47 241 10.59 269 — —

M 14.43 367 17.44 443 18.65 474 — —

N 1.51 38 1.51 38 1.51 38 1.00 25

O 1.00 25 1.00 25 1.00 25 — —

P 7.12 181 7.12 181 7.19 183 — —

mc_091010_0925

5, 10, and 20 30 and 50 75 and 100 150 and 200

inches mm inches mm inches mm inches mm

OM-7594

Page 8 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 13

Mounting: Clearances

Figure 9-1: XT humidifier recommended minimum clearances

Installation

3”

(76 mm)

mc_091010_0922

16” (400 mm)

15” (380 mm)

3” (76 mm) between units

36” (914 mm) front clearance

OM-7583

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 9

Page 14

Installation

Mounting

Opening and closing cabinet doors

To open the cabinet doors, use a slotted screwdriver to rotate the quarter-turn fastener counterclockwise so the slot is vertical.

To close the doors, close the right then the left door, and push the quarter-turn fastener while turning clockwise so the slot is horizontal.

WARNING

Mounting hazard

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

mc_060110_1540

Unpack the humidifier from the shipping carton, and remove the cabinet doors and steam cylinder.

Removing cabinet doors

XT humidifier and XTSB doors have lift-off hinges for easy removal of open doors. The doors are captivated when closed but should be removed when open. An upward bump could damage the door if it jumps the hinges and falls.

Removing steam cylinder

Make sure the cylinder is empty and cooled before removing it.

1. Disconnect electrode and high water sensor connectors from steam cylinder.

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

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

4. Raise cylinder until drain outlet clears drain valve body, and remove cylinder from cabinet.

Wall mounting humidifier

Follow the instructions below for your model and wall type, and mount the humidifier level and plumb. See Figures 14-1 and 15-1.

• Wood studs 16" (406 mm) on center, XT models 75 through 200:

Mark hole locations at centers of studs, and predrill ¼" (6 mm) diameter pilot holes. Secure humidifier to wall with lag bolts (provided).

• Metal studs 16" (406 mm) on center, XT models 75 through 200:

Mark hole locations at centers of studs. Using a drill bit just large enough to push a 3/8" (10 mm) bolt through, drill through studs and wall, and through a backing plate on other side of wall. Push bolts through wall, studs, and backing plate. Secure humidifier to wall with bolts, and secure backing plate with washers and nuts.

• XT models 5 through 50, and XT models 75 through 200 if

16"-on-center (406 mm) studs are not available: Mount spanner boards on wall, spanning at least two studs.

Position one board at top of cabinet (for the lag bolts), and the other board at bottom of cabinet. Secure humidifier to spanner boards with lag bolts.

• Hollow block or poured concrete wall, any XT model:

Mark hole locations, and drill appropriate pilot holes for two 3/8" (10 mm) toggle bolts or two 3/8" (10 mm) machine bolt lead anchors. Secure humidifier in place with bolts and anchors.

Page 10 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 15

Fill cup extension kit

Installation

A fill cup extension kit (Figure 11-1) is required for any of the following:

• XT humidifier models 75 through 200 (fill cup extension kit ships loose with these models)

• All XT humidifiers using Ultra-sorb or Rapid-sorb dispersion

• All XT humidifiers with more than 20' (6 m) maximum developed length of tubing/pipe from humidifier to dispersion assembly

mc_110110_1455

Removing existing fill cup: XT models 5 through 50

If installing a fill cup extension kit for XT models 5 through 50, first remove the existing fill cup as follows:

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

See “Removing steam cylinder” on Page 10.

2. Expand spring clamps and slide them up cylinder fill hose and

supply water hose, and disconnect hoses from fill connection and fill valve adapter.

3. Disconnect overflow hose from overflow elbow.

4. Fill cup is press fit into top of XT cabinet. Rock fill cup back

and forth while pushing up until it comes out, then remove fill cup and hoses.

Installing fill cup extension kit: all XT models

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

See “Removing steam cylinder” on Page 10.

2. Route fill cup extension kit hoses into cabinet through fill cup

hole, and fasten extension bracket as shown with two screws provided.

3. Cut supply water hose (small-diameter hose) (A) to length so it

can attach to fill valve adapter without kinking.

4. 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.

5. Cut cylinder fill hose (bottom, center hose) (B) to length so it

can attach to fill connection without kinking.

6. Expand spring clamp and slide it onto cylinder fill hose (B)

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

7. Cut overflow hose (C) to length so it can attach to overflow

elbow without kinking.

8. Push overflow hose onto overflow elbow. No spring clamp is

required on this connection.

Figure 11-1: Fill cup extension kit

Overﬂow hose (C)

Cylinder ﬁll hose (B)

Supply water hose (A)

Fill valve adapter

Drain cup plate

Supply water (A)

Cylinder ﬁll (B)

mc_102810_1430

Fill cup (see inset below)

Overﬂow elbow

OM-7588

Fill connection

Fill cup

Overﬂow (C)

OM-7629

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 11

Page 16

Installation

Steam cylinder

Figure 12-1: Steam cylinder installation

Strainer

Figure 12-2: Steam cylinder installation

High water sensor pin

OM-7623X

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 12-2.

3. 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.

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

5. Connect electrode plugs to pins on cylinder. Make sure all plugs fit snugly and are fully engaged on pins.

Note: If cylinder plugs becomes loose, obtain replacement plugs

from DRI-STEEM. See “Replacement parts" on Pages 55 and 57 for part numbers.

Important: Cylinders with six electrodes 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 humidifier if necessary.

Cylinder guide

Drain valve body

OM-7623X

Condensate return guidelines

To prevent overfilling the steam cylinder, follow the guidelines below when returning condensate to the cylinder:

• When condensate can be returned to the steam cylinder:

– Single tube dispersion

– Less than 20 lbs/hr (9.1 kg/h) of steam production

– 20' (6 m) or less of steam hose, tubing, or pipe between

humidifier and dispersion

• When condensate should be wasted to the drain:

– Ultra-sorb or Rapid-sorb dispersion

– Single tube dispersion with condensate drain and:

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

- More than 20' (6 m) of steam hose, tubing, or pipe between humidifier and dispersion

Page 12 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 17

Piping: Supply water and drain

Installation

Supply water piping

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

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, ¾" (DN 20) ID material rated for 212 °F (100°C) minimum.

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

The XT humidifier tempers drain water by opening the fill valve whenever the drain valve is energized, which automatically cools drain water before it enters the drain. Drain water tempering is intended to keep water entering the drain line no hotter than 140°F (60°C). However, manually energizing the drain valve when the supply water is shut off can allow 212 °F (100 °C) water to enter the drain line.

Observe 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 humidifier.

• 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, low-pressure 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.

A drain hose is provided to function as the flexible connection from the drain cup to the field-installed open drain. See Figure 13-1.

Piping drawings:

See the piping drawings on Pages 14 and 15.

Important: Thoroughly flush the

supply water piping to remove pipe residue and stagnant water before connecting piping to the humidifier. Pipe residue and stagnant water in the water supply piping can cause foaming, preventing the humidifier from reaching the 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

1" (25 mm) air gap

Open drain

Hose clamp*

Black rubber hose*

Pitch 1/8”/ft (1%) towards drain

¾" (DN20) I.D.

To drain

* Hose clamp and black rubber hose ship with each humidiﬁer;

they can also be ordered from DRI-STEEM. See the replacement parts section of this manual for part numbers.

mc_102810_1415

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 13

OM-7589

Page 18

Installation

Piping: XT models 5 through 100

Figure 14-1: XT humidifier field piping overview, models 5 through 100

Steam hose; may also use tubing or pipe.

See Table 24-1 for maximum piping lengths.

Tubing or pipe must be grounded.

Fill valve with 1/4” FIP strainer

(3/8"BSP [DN10] in Europe)

1” (25 mm) air gap required to isolate drain

water from cylinder water. Locate air gap

only in spaces with adequate temperature and air movement to absorb ﬂash steam, or condensing on nearby surfaces could occur.

Install plumb

Hose and clamp

* Pitch 1/8”/ft (1%)

toward drain

Metallic water supply line

Shock arrester (by installer)

recommended to reduce water hammer

Dashed lines indicate provided by installer.

mc_090210_0845

Pitch*

Floor drain

Open drain required directly below humidiﬁer drain 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.

Plumb spill funnel to ﬂoor drain.

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

3/4” (DN20) drain piping. If piping run is over 10’ (3 m), increase pipe to 1¼” (DN32).

OM-7584

Page 14 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 19

Piping: XT models 150 and 200

Figure 15-1: XT humidifier field piping overview, models 150 and 200

Steam hose; may also use tubing or pipe.

See Table 24-1 for maximum piping lengths.

Tubing or pipe must be grounded.

Installation

Fill valve with 1/4”

FIP strainer

(3/8"BSP [DN10]

in Europe)

Metallic water

supply line

Shock arrester

(by installer)

recommended

to reduce water

hammer

Dashed lines indicate provided by installer.

mc_090210_0847

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

Pitch*

Hose and clamp

Install plumb

Floor drain

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

* Pitch 1/8”/ft (1%) toward drain

1” (25 mm) air gap required to isolate drain water from cylinder water. Locate air gap only in spaces with adequate temperature and air movement to absorb ﬂash steam, or condensing on nearby surfaces could occur.

Open drains required directly below humidiﬁer 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.

1¼” (DN32) drain piping after second drain connection

OM-7595

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 15

Page 20

Installation

Piping: XT steam blowers

Figure 16-1: Piping from XT humidifier steam cylinders to XT steam blowers (XTSB)

XTSB mounted remotely

Maximum recommended distance between humidiﬁer and XTSB is 10’ (3 m).

Condensate hose

(purchased separately

from DRI-STEEM)

7” (178 mm)

water seal

Plastic tie

To open drain or humidiﬁer ﬁll cup Water seal is required, whether condensate is piped to open

drain or returned to humidiﬁer ﬁll cup.

Hose clamp (provided)

Steam hose (purchased separately from DRI-STEEM)

OM-7602

Hose clamp (provided)

XTSB mounted directly on top of

XT humidiﬁer

Hose clamp (provided)

Steam hose (provided)

Hose clamp (provided)

OM-7603

mc_091010_0939

Page 16 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 21

Piping: XT steam blowers

Figure 17-1: Piping from XT humidifier steam cylinders to XTSBs with Y connectors

* Water seal is required, whether condensate is piped

to open drain or returned to humidiﬁer ﬁll cup.

Plastic tie

Pitch 2”/ft (15%) minimum

1½” (DN40) steam hose (provided)

Y connector (provided)

Installation

XTSB-50

Hose clamp (provided)

Plastic tie

1½” DN40 steam hose

(provided)

Y connector (provided)

Hose clamp

7” (178 mm)

water seal

To open drain or

humidiﬁer ﬁll cup*

XT-75

Hose clamp (provided)

To open drain or

humidiﬁer ﬁll cup*

Pitch 2”/ft (15%) minimum

Condensate hose (provided)

Plastic tie

OM-7604

Maximum recommended distance between humidiﬁer and XTSB is 10” (3 m).

XTSB-50

Hose clamp (provided)

mc_091010_0940

Condensate hose (provided)

7” (178 mm)

water seal

Plastic tie

To open drain or

humidiﬁer ﬁll cup*

XT-150

To open drain or

humidiﬁer ﬁll cup*

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 17

OM-7605

Page 22

Installation

Piping: XT steam blowers

Figure 18-1: Piping from XT humidifier steam cylinders with multiple outlets to XTSBs

* Water seal is required, whether condensate is piped

to open drain or returned to humidiﬁer ﬁll cup.

XTSB-50

1½” (DN40) steam hose (provided)

7” (178 mm)

water seal

Plastic tie

To open drain or

humidiﬁer ﬁll cup*

Pitch 2”/ft (15%) minimum

XT-100

To open drain or

humidiﬁer ﬁll cup*

Hose clamp (provided)

Condensate hose (provided)

Plastic tie

Maximum recommended distance between humidiﬁer and XTSB is 3 m.

Pitch 2”/ft (15%) minimum

OM-7606

XTSB-50

Hose clamp (provided)

1½” (DN40) steam

hose (provided)

7” (178 mm)

water seal

mc_091410_1055

To open drain or

humidiﬁer ﬁll cup*

XT-200

To open drain or

humidiﬁer ﬁll cup*

Hose clamp (provided)

Condensate hose (provided)

Plastic tie

Page 18 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

OM-7607

Page 23

Humidifier wiring

Installation

All wiring must be in accordance with all governing codes and with the unit wiring diagram. Power supply wiring must be rated for 105 °C. See Figure 19-1 for the humidifier wiring diagram locations

When selecting a location for installing the humidifier:

• 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 humidifier cabinet. See Figure 8-1.

CAUTION

Adding conduit connections not recommended

Adding alternate conduit connections is not recommended. If you must make additional holes in the humidiﬁer cabinet, protect all internal components from debris, and vacuum out the cabinet when ﬁnished. Failure to follow these precautions can damage sensitive electronic components and void the DRI-STEEM warranty.

Figure 19-1: Field wiring requirements

Wiring diagram inside of electrical control cabinet door

XT Humidiﬁer

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 humidiﬁer 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.

Power supply

Fused disconnect

OM-7363

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 19

Page 24

Installation

WARNING

Electric shock hazard

Only qualiﬁed electrical personnel should perform ﬁeld 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 ﬁre.

Humidifier wiring

Control component placement

Follow the guidelines on Page 22 transmitters, and airflow proving switches.

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 humidifier.

See “Step 1 – Field wiring” in the Vapor-logic4 Installation and Operation Manual for detailed instructions on the following:

• Control input wiring:

See the “Control input” section.

for placing humidistats,

WARNING

Excessive moisture hazard

DRI-STEEM strongly recommends installing a duct airﬂow proving switch and a duct high limit humidistat. These devices prevent a humidiﬁer from making steam when there is low airﬂow 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.

mc_060310_0725

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

See the following sections: “Airflow proving switch” and “Duct high limit switch or transmitter”

• Remote signal wiring:

See the following sections: “Programmable triac” and “Programmable relay (dry contact)”

Page 20 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 25

Humidifier wiring

Installation

Earth grounding requirements

A safety earth grounding system that meets national, state, and local electrical codes is required. The ground connection must be made with solid metal-to-metal connections. Ground wire should be the same size as power wiring.

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 fluorescent light circuits. The electrical noise or interference generated from these sources (and the effect on controllers) is difficult to define, 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 plenumrated 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.

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 21

Page 26

Installation

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

Humidistat and transmitter placement

Humidistat and sensor locations are critical

Humidistat and sensor location have a significant impact on humidifier performance. In most cases, do not interchanging duct and room humidity devices. Room humidity devices are calibrated with zero or little airflow; whereas duct humidity devices require air passing across them.

Recommended sensor locations (see figure below):

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

stable temperature control.

B Acceptable, but room environment may 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 moisture 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 may not represent actual overall

conditions in the space.

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

passageways, or areas of stagnant airflow.

G Best sensing location for a high-limit humidistat or humidity

transmitter and airflow proving switch.

Figure 22-1: Recommended humidistat and transmitter locations

Outside air

Damper control

Relief air Return air

mc_060508_0750-XT

Air handling unit

Window

High limit humidistat or high limit transmitter (set at

8' to 12'

(2.4 m to 3.7 m)

minimum

Wall or

partition

WindowDoorway

90% RH maximum) for VAV applications

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

Vapor absorption has taken place

Point of vapor absorption

Humidiﬁer dispersion assembly

Turning vanes

DC-1084

Page 22 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 27

Dispersion: Selecting the dispersion assembly

location

Installation

DRI-STEEM humidifiers 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.

• For each dispersion device, DRI-STEEM documents distances required for non-wetting to occur. For more information about absorption non-wetting distances, see the non-wetting tables in this humidifier's product catalog, available for viewing, printing or ordering at www.dristeem.com.

• In general, the dispersion assembly is best placed where the air can absorb the moisture being added without causing condensation at or after the unit. This normally will be after the heating coil or where the air temperature is highest.

• Place the dispersion assembly such that absorption will occur

– before the intake of a high efficiency filter, because the filter

can remove the visible moisture and become waterlogged;

– before coming in contact with any metal surface;

– before fire 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 flash steam; otherwise, condensation may form on nearby surfaces.

mc_060210_0838

Figure 23-1: Ultra-sorb with the High-efficiency Tube option

High-efficiency Tube option

Dispersion assemblies with the High-efficiency Tube option are designed to produce significantly less dispersion-generated condensate and airstream heat gain, which reduces wasted energy by up to 85%. These improvements are accomplished by reducing the thermal conductivity of the tubes with 1/8" of polyvinylidene fluoride (PVDF) insulating material on the outside of the tubes. These assemblies require careful unpacking, installation, and handling. If your dispersion assembly has the High-efficiency Tube option, be sure to read this section carefully.

mc_060208_1320

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 23

Page 28

Installation

Dispersion: Interconnecting piping requirements

Important:

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

mc_060210_0843

Important:

Reducing the inside diameter of the interconnecting piping will result in the internal humidifier system pressure exceeding the parameters for acceptable performance.

mc_060210_0847

The steam outlet on the humidifier is sized to the output of the humidifier. DO NOT use steam hose or interconnecting tubing/piping with an inside diameter smaller than the humidifier steam outlet. See note at left.

• See maximum steam carrying capacities in Table 24-1.

• If the humidifier must be located higher then the dispersion assembly, use the recommend installation shown in Figure 28-1.

Connecting to humidifier with steam hose

• Support steam hose to prevent sags, or low spots, and to maintain a minimum pitch of 2"/ft (15%) away from the humidifier.

• Use DRI-STEEM steam hose. Other manufacturers of steam hose may use unacceptable release agents or material mixes that can affect humidifier system performance adversely. Using hose from alternative manufacturers increases the possibility of tank foaming and accelerated 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 tube applications, see hose kit sizes in Table 25-2.

Table 24-1: Maximum steam carrying capacity and length of interconnecting steam hose, tubing, and pipe*

DRI-STEEM black steam hose

Hose I.D. Maximum capacity Maximum length** Tube or pipe size*** Maximum capacity

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

1½ 40 150 68 10 3 1½ 40 150 68 20 6

2 50 250 113 10 3 2 50 220 100 30 9

* Based on total maximum pressure drop in hose, tubing, or piping of 5" wc (1244 Pa). ** Maximum recommended length for steam hose is 10' (3 m). Longer distances can cause kinking or low spots. *** To minimize loss of capacity and efﬁciency, insulate tubing and piping.

†

Developed length equals measured length plus 50% of measured length to account for pipe ﬁttings. If maximum developed length is more than 20' (6 m), a ﬁll

cup extension kit is required. See Figure 11-1.

††

Requires ﬂange connection.

†††

When using steam hose, use DRI-STEEM steam hose for best results. Field-supplied hose may have shorter life and may cause foaming in the evaporating

chamber resulting in condensate discharge at the dispersion assembly. Do not use steam hose for outdoor applications.

mc_091410_1050-XT

†††

††

4†† 100

††

Copper or stainless steel tubing

and Schedule 40 steel pipe

125

150

††

450 204 80 24

750 340 100 30

1400 635 100 30

2300 1043 100 30

Maximum

developed length

†

Page 24 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 29

Dispersion: Interconnecting piping requirements

Installation

Connecting to humidifier with tubing or pipe

• See Figures 30-1 and 31-1 for interconnecting tubing and pipe pitch requirements for single tube applications. See Table 33-1 for interconnecting tubing and pipe pitch requirements for Rapid-sorb applications.

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

• Steam supply adapters are available from DRI-STEEM. These adapters convert a tubing outlet on the humidifier to threaded pipe, allowing a pipe connection.

• 90° elbows are not recommended; use two 45° elbows, 1' (0.3 m) apart.

• Thin wall tubing heats up faster and causes less start-up loss than heavy wall pipe.

• Insulating hard pipe reduces the loss in output caused by condensation.

• When using hard pipe, take care to remove ALL traces of lubricants used to thread the pipe. This will minimize the possibility of tank foaming. Denatured alcohol or mineral spirits work best for removing lubricant.

mc_060310_1145-NA

Table 25-2: Hose kit sizing by capacity

Maximum

tube capacity

lbs/hr kg/h

28.4 12.9 1½" (DN40) without drain

56.8 25.8 1½" (DN40) with drain

> 56.8 >25.8

Hose kit

(steam hose, dispersion tube, and hardware)

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

Grounding steam pipes

The XT humidifier has built-in functionality for detecting and eliminating foaming in the steam cylinder. However, because brief periods of foaming are possible, grounding metal steam pipes back to the XT humidifier earth grounding 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 pipe. The grounding lug is shown in Figures 54-1 and 56-1.

Table 25-1: Steam loss of interconnecting steam hose, tubing and pipe

Description

Hose

Tubing

Pipe

Note: These data are based on an ambient air temperature of 80 °F (27 °C), ﬁberglass insulation, copper tubing, and Schedule 40 pipe.

mc_051310_1215-NA

Nominal hose, tubing or pipe 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

1½ 40 0.22 0.33 0.02 0.03 2 50

2 50 0.25 0.38 0.025 0.037 2 50

Noninsulated Insulated

Steam loss

Insulation thickness

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 25

Page 30

Installation

Dispersion: Interconnecting piping requirements

Figure 26-1: Piping connections to Single dispersion tube, Rapid-sorb, and Ultra-sorb Model LV or LH dispersion assemblies

1½” (DN40) steam

hose

Connector kit

(provided)

Steam outlet connections to steam hose

(XT models 5, 10, 20 shown)

To dispersion assembly Pitch steam hose 2”/ft (15%)

toward dispersion assembly.

Hose clamp

1” (DN25) steam hose

Steam outlet connections to tubing or pipe

(XT models 30, 50, 75 shown)

To dispersion assembly Pitch steam hose 2”/ft (15%)

toward dispersion assembly.

1½” (DN40) tubing or pipe (must be grounded)

Hose clamp

1½” (DN40) I.D. steam hose

Hose clamp

OM-7622

Steam hose and clamps are provided with these humidiﬁers.

mc_091010_1004

OM-7623

Page 26 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 31

Dispersion: Interconnecting piping requirements

Figure 27-1: Piping connections to Single dispersion tube, Rapid-sorb, and Ultra-sorb Model LV or LH dispersion assemblies

Installation

XT-100

Stainless steel

Y connector*

Hose

clamp*

* Stainless steel Y connector, two 1½” (DN40) hoses, and four hose

clamps ship with each XT-100 humidiﬁer.

XT-200

Stainless steel tube

connector*

To dispersion assembly Pitch steam hose 2”/ft (15%)

toward dispersion assembly.

2” (DN50) steam hose

1½” (DN40) steam hose*

OM-7619

XT-150

3” (DN80) ﬂange connection attached directly to dispersion (see inset at right)

Stainless steel tube

connector*

Hose clamp*

1½” (DN40)

steam hose*

* Stainless steel tube connector, one 2" (DN50) hose, and two hose

clamps ship with each XT-150 humidiﬁer.

2” (DN50) steam hose attached directly to dispersion (see inset below)

Hose clamp*

OM-7620

Connecting multiple cylinders to a dispersion assembly

2” (DN50) steam hose

Stainless steel

Y connector*

1½” (DN40) steam hose*

Hose

clamp*

OM-7621

* Stainless steel tube connector, two stainless steel Y-connectors, four 1½” (DN40) hoses,

and eight hose clamps ship with each XT-200 humidiﬁer.

mc_091010_0938

steam hose connection

steam hoses from multiple cylinders

3” (DN80)

ﬂange connection

2” (DN50) steam

hoses from multiple

cylinders

For multiple cylinders, connect the stainless steel tube connector (provided with XT models 150 and 200; available for staged XT humidiﬁers) directly to the dispersion inlet. The diameter and pitch of the tube connector must match the inlet diameter and pitch of the dispersion unit. Connect a maximum of two cylinders to the tube connector with steam hose, tubing, or pipe.

2” (DN50)

1½” (DN40)

OM-7625

OM-7624

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 27

Page 32

Installation

WARNING

Hot surface and steam hazard

Dispersion tube, steam hose, tubing, or hard pipe 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.

mc_060110_1555

Figure 28-1: Drip tee installation

Dispersion: Drip tee installation

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

Important: Steam hose must be supported to prevent sagging

or low spots.

90° long sweep or two 45° elbows

Obstruction

Insulate tubing and hard pipe to reduce steam loss

To dispersion assembly

6" (150 mm) recommended

8" (200 mm) minimum

1" (25 mm) air gap

Pitch

Adapter

XT humidiﬁer

Tubing or pipe drip tee, by installer. DRI-STEEM part numbers for 304 stainless steel inline tees:

• 1½" (DN40) kit: 191071-001

• 2" (DN50) kit: 191071-002

¾" (DN20)

Open funnel or ﬂoor drain. See ﬁrst note below.

Notes:

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

• Support steam hose so there are no sags or low spots.

• Dashed lines indicate provided by installer.

mc_062810_0645-XT

Page 28 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

OM-7364X

Page 33

Dispersion: Single dispersion tube

Installation

Installation notes

• Use DRI-STEEM’s hard pipe adapter kit to connect the steam outlet to hard pipe. Use a hose clamp to connect the steam outlet to steam hose. Use a hose cuff and clamps to connect the steam outlet to tubing.

• Thin-walled tubing heats up faster than heavy-walled pipe causing less steam loss at start-up.

• Hard pipe or tubing diameter must match XT steam outlet connection.

• See the maximum steam carrying capacity and steam loss tables on Pages 24 and 25.

• Maximum capacity of dispersion tube without condensate drain:

– 1½" (DN40): 28.4 lbs/hr (13 kg/h)

– 2" (DN50): 56.8 lbs/hr (25.8 kg/h)

• Maximum capacity of dispersion tube with condensate drain:

– 1½" (DN40): 56.8 lbs/hr (25.8 kg/h)

– 2" (DN50): 85.2 lbs/hr (38.6 kg/h)

• Orient dispersion tube with tubelets (steam orifices) pointing up.

• If mounting the humidifier above the level of dispersion tube, see “Drip tee installation” on Page 28.

• Table 25-1 lists hose kit sizes by humidifier capacity. Note that the capacities of Models XT-75 through XT-200 require multiple tube assemblies and cannot use a hose kit. For multiple tube assemblies, see “Rapid-sorb” beginning on Page 32.

mc_062810_1030-XT

See Single dispersion tube installation drawings in Figures 30-1 and 31-1.

Important:

mc_060210_0843

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 29

Page 34

Installation

Figure 30-1: Single dispersion tube without condensate drain

Steam hose, tubing or pipe (tubing

or pipe must be grounded). Insulate

tubing and hard pipe to reduce

steam loss. Do not insulate steam

hose. See Table 24-1 for maximum

piping lengths.

See the ﬁrst bullet in

Installation notes.

Adapter

Dispersion: Single dispersion tube

Duct

Single dispersion tube without condensate drain

Pitch*

Secure and seal

escutcheon plates

90° long sweep or two 45° elbows

Mounting nut 3/8" - 16 (M10)

Tube pitch: 2"/ft (15%)

OM-7365X

* Pitch steam hose, tubing, or pipe

toward humidiﬁer:

– 2"/ft (15%) when using steam

hose

– ½"/ft (5%) when using 1½"

tubing or pipe

Dashed lines indicate provided by installer.

mc_062810_0720-XT

XT humidiﬁer

Dispersion tube escutcheon plate

Dimension A:

3.25" (82.5 mm) for 1½" tubes

OM-351-1

Page 30 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 35

Dispersion: Single dispersion tube

Figure 31-1: Single dispersion tube with condensate drain

Installation

Steam hose, tubing, or pipe (tubing or pipe must be

grounded). Insulate tubing and hard pipe to reduce

steam loss. Do not insulate steam hose. See Table

24-1 for maximum piping lengths.

90° long sweep or two 45° elbows

See the ﬁrst bullet in

Installation notes.

Adapter

* Pitch steam hose, tubing, or pipe toward dispersion tube: – 2"/ft (15%) when using steam hose – ½"/ft (5%) when using 1½" tubing or pipe

Dashed lines indicate provided by installer.

mc_062810_0725-XT

Secure and seal escutcheon plates

Water seal 5" (125 mm)

1" (25 mm) air gap

XT humidiﬁer

Pitch*

6" (150 mm) recommended

Duct

¼" NPT (DN8)

¾" (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 ﬂash steam; otherwise, condensation may form on nearby surfaces. Refer to governing codes for drain pipe size and maximum discharge water temperature.

Dispersion tube

Dimension A:

3.25" (82.5 mm) for 1½" tubes

Single dispersion tube with condensate drain

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

½" O.D. (DN15) condensate drain tube. Pitch ¼”/ft (2%) toward escutcheon plate.

Escutcheon plates

Condensate drain

3.25" (82.5 mm)

Mounting nut 3/8" - 16 (M10)

OM-7366X

3.25" (82.5 mm)

OM-351-1

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 31

Page 36

Installation

WARNING

Hot surface and steam hazard

mc_060110_1555

Important:

Before marking and drilling holes in the duct or air handler, refer to ALL pitch requirements for the Rapid-sorb assembly you received (see Table 33-1). The size, quantity, and location of penetrations are determined by the dimensions and configuration of the Rapid-sorb assembly you received.

mc_060210_0937

Important:

mc_060210_0843

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 DRI-STEEM immediately. The components typically include the following:

– Multiple dispersion tubes

– Header

– ¾" × 2" (19 mm × 51 mm) L-bracket

Note: Dispersion tubes, header, and L-bracket are each tagged

with the customer requested identification 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 at left):

– 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.

• 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-airflow duct with Rapid-sorb header either inside or outside the duct. See the Dri-calc Installation Guides library or contact your representative/distributor or DRI-STEEM for installation instructions for air handler or vertical airflow applications.

mc_060210_0945-NA

Page 32 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 37

Dispersion: Rapid-sorb

Installation

Pitch requirements

• For Rapid-sorb with the header outside a horizontal-airflow duct, consider the following:

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

length to accommodate the 1/8"/ft (1%) pitch requirements toward the ¾" pipe thread (DN20) header drain fitting.

– 2" (DN50) dispersion tubes: The bracket can be mounted

flush to the ductwork. The 1/8"/ft (1%) pitch typically can be accomplished in the length of the hose cuffs used to connect the tubes to the header.

• See Table 33-1 and the drawings on the following pages for pitch requirements.

mc_060210_0953-NA

Table 33-2: Rapid-sorb dispersion tube capacities

Tube capacity Tube diameter

lbs/hr kg/h inches DN

≤ 35 ≤ 16 1½ 40

36-70 17-32 2 50

mc_060210_0935

Table 33-3: 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

mc_060210_0936

Table 33-1: Pitch of interconnecting piping, dispersion tubes, and headers for Rapid-sorb evaporative dispersion units

Airﬂow

Horizontal

Vertical

mc_060310_1000

Type of

interconnecting piping

Steam hose

Tubing or pipe

Steam hose

Tubing or pipe

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

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 33

Page 38

Installation

Dispersion: Rapid-sorb

Figure 34-1: Rapid-sorb in a horizontal airflow with header outside the duct

L-bracket. Install with ﬂange facing upstream direction of airﬂow.

Drawing shows L-bracket correctly positioned for airﬂow.

90° long sweep or two

45° elbows

Steam hose, tubing, or pipe

(tubing or pipe must be

grounded). Insulate tubing

and hard pipe to reduce

steam loss. Do not insulate

steam hose. See Table 24-1 for

maximum piping lengths.

See Note 2

Notes:

1 Pitch steam hose, tubing, or pipe toward Rapid-sorb:

– 2"/ft (15%) when using steam hose – 1/8"/ft (1%) when using tubing or pipe

2 Use DRI-STEEM’s hard pipe adapter kit to connect steam outlet to hard pipe. Use a hose clamp to

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

mc_062810_0815-XT

Dispersion tube. Orient with

tubelets perpendicular to airﬂow.

Slip coupling or

hose cuff

Pitch (see Note 1)

Header pitch:

1/8"/ft (1%) minimum

XT humidiﬁer

Condensate drain ¾" pipe

Dashed lines indicate provided by installer.

Airﬂow

Duct

thread (DN20)

¾" (DN20) copper

1" (25 mm) air gap

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

5" (125 mm) recommended

Secure and seal escutcheon plates

Support bracket (0.421" [11 mm] mounting holes at top, bottom, and end)

6" (150 mm) recommended

Dispersion tube escutcheon plates

Dimension A:

• 3.25" (82.5 mm) for 1½" tubes

• 5" (127 mm) for 2" tubes

OM-351-1

OM-7627

Header outside of duct, 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 floor.

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

3. Mount the dispersion tubes to the header with the slip coupling or hose cuff (provided).

• When installing slip couplings for 1½" (DN40) dispersion tubes, take care not to shear the O-rings.

• Set the slip coupling on the header stub or dispersion tube so the O-ring is resting on the face of the tubing.

• Rotate the slip coupling as you push it onto the tubing.

• The O-rings are lubricated at the factory. If additional lubrication is necessary, DO NOT use a petroleum-based lubricant.

Page 34 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 39

Dispersion: Rapid-sorb

Installation

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

5. Before tightening the L-bracket bolts to the dispersion tubes:

• For 1½" (DN40) dispersion tubes: – Dispersion tube will rotate in slip coupling. Verify that

dispersion tube orifices are directed perpendicular to airflow.

– Dispersion tube and slip coupling must be fully engaged

on header stub for O-rings to provide a seal.

• For 2" (DN50) dispersion tubes: Before securing hose cuff in place with hose clamps on

dispersion tube and the header stub, verify that dispersion tube orifices are directed perpendicular to airflow.

6. Slide the assembly up until the L-bracket aligns with the mounting holes in the duct.

• 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.

• For 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 header pitch, 1/8"/ft (1%) toward drain, is maintained.

7. Permanently secure both ends of header, and verify that header pitch, 1/8"/ft (1%) toward drain, is maintained.

8. Verify that all fasteners are secure:

• L-bracket to duct

• Dispersion tubes to L-bracket

• Hose clamps on 2" (DN50) tubes

9. Secure and seal the dispersion tube escutcheon plate and condensate drain tube escutcheon plate around the respective tubes, if applicable.

Note:

See Page 38 for steam supply and condensate drain line connection instructions.

mc_060210_1015-NA

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 35

Page 40

Installation

Dispersion: Rapid-sorb

Figure 36-1: Rapid-sorb in a horizontal airflow with header inside the duct

L-bracket. Install with ﬂange facing upstream

90° long sweep or two

45° elbows

Steam hose, tubing, or pipe (tubing

or pipe must be grounded).Insulate

tubing and hard pipe to reduce

steam loss. Do not insulate steam

hose. See Table 24-1 for maximum

piping lengths.

See Note 2

Notes:

1 Pitch steam hose, tubing, or pipe toward Rapid-sorb:

– 2"/ft (15%) when using steam hose – 1/8"/ft (1%) when using tubing or pipe

2 Use DRI-STEEM’s hard pipe adapter kit to connect steam outlet to hard pipe. Use a hose clamp to connect steam outlet

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

direction of airﬂow. Drawing shows L-bracket

correctly positioned for airﬂow.

Dispersion tube. Orient with

tubelets perpendicular to airﬂow.

Slip coupling or hose cuff

Secure and seal escutcheon plates

Pitch (see Note 1)

Header pitch:

1/8"/ft (1%) minimum

XT humidiﬁer

Airﬂow

Condensate drain ¾" pipe

¾" (DN20) copper

1" (25 mm) air gap

thread (DN20)

Dashed lines indicate provided by installer.

Duct

Support bracket (0.421" [11 mm] mounting holes at top, bottom, and end)

6" (150 mm) recommended

5" (125 mm) recommended

mc_062810_0820-XT

WARNING

Hot surface and steam hazard

mc_060110_1555

OM-7628

Header inside of duct, horizontal airflow

1. Mark and cut holes in ductwork or air handler for steam header penetration, condensate drain piping, and header 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 horizontally 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 requirements, the header can be set on the floor of the air handler, assembled in the vertical position, and then raised and mounted in place.

Page 36 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 41

Dispersion: Rapid-sorb

Installation

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 dispersion 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.

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 orifices are directed perpendicular to airflow.

8. Verify that all fasteners are secure:

Note:

See Page 38 for steam supply and condensate drain line connection instructions.

• L-bracket to duct

• Dispersion tubes to L-bracket

• Hose clamps on 2" (DN50) tubes

• Header support bracket fastener

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

mc_060210_1050 -NA

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 37

Page 42

Installation

CAUTION

Operate Rapid-sorb within rated steam capacity

Excessive steam ﬂow 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.

mc_072010_0930

Dispersion: Rapid-sorb

Steam supply connections to Rapid-sorb header

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

If multiple humidifiers are supplying one Rapid-sorb, a multiple steam supply connector is provided. Typically, the multiple steam supply connector attaches to the Rapid-sorb header supply end with hose cuff and clamps:

1. Route the necessary number of steam supplies from the humidifiers to the steam supply connector.

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.

Condensate drain connections to Rapid-sorb header

Piping must be minimum ¾" I.D. (DN20) and rated for 212 °F (100 °C) minimum continuous operating temperature.

The condensate drain line must be piped as shown in Figures 34-1 and 36-1. Provide a 6" (152 mm) drop prior to a 5" (127 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 flash steam, or condensing on nearby surfaces may occur.

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

Ultra-sorb Model LV or LH

For Ultra-sorb steam dispersion panel instructions, see the installation, operation, and maintenance manual shipped with the Ultra-sorb.

mc_060210_1300-NA

Page 38 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 43

Dispersion: XT steam blowers

Installation

On a call for humidity, the controller closes the contactors to energize the humidifier electrodes and the fan relay to energize the XT steam blowers (XTSB). When the call for humidity is satisfied, the controller opens the humidifier contactor but keeps the XTSB running for a preset amount of time, which is adjustable via the Vapor-logic4 Setup menu.

As steam is discharged from the XTSB, it quickly cools and turns to a visible fog that is lighter than air. As this fog is carried away from the XTSB 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 39-1 lists the maximum rise, spread, and throw non-wetting distances for XT humidifiers with XTSBs. 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 nonwetting distances in the table.

XTSBs are field wired to the XT humidifier blower terminals. A wiring diagram is included with the XTSB.

mc_091310_1741

Steam outlet

Figure 39-1: XTSB rise, spread, throw

Air intake

Steam outlet

Rise

Spread

mc_110110_1530

Air intake

Throw

OM-7598

Table 39-1: XTSB minimum non-wetting distances

Maximum

model

5 5 2.3 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

10 10 4.5 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

20 20 9.1 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

30 30 13.6 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

50 50 22.7 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

75 75 34.0 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

100 100 45.4 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

150 150 68.0 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

200 200 90.7 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 XTSB Spread: Minimum non-wetting width from the steam outlet of the XTSB Throw: Minimum non-wetting horizontal distance from the steam outlet of the XTSB

mc_091310_1740

steam

capacity

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

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

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 39

Page 44

Installation

Dispersion: XT steam blowers

The XTSB can be mounted on top of an XT humidifier cabinet, or wall-mounted remotely from the humidifier. See Figure 41-2.

XTSB-20, for capacities up to 20 lbs/hr (9.1 kg/h), can be directly mounted on XT humidifier models 5, 10, and 20.

XTSB-50, for capacities up to 50 lbs/hr (22.7 kg/h), can be directly mounted on XT humidifier models 30 and 50.

XTSB installation must comply with governing codes.

Removing XTSB doors

Figure 40-1: XTSB dimensions

XTSB-20 shown

Front Side Back

mc_091410_1106

Table 40-1: XTSB dimensions

Dimension

A 15.82 402 19.09 485

XTSB-20 XTSB-50

inches mm inches mm

OM-7601

B 10.86 276 16.06 408

C 12.03 306 14.09 358

D 2.56 65 0.98 25

E 10.97 279 11.73 298

F 3.27 83 2.72 69

mc_091310_1742

Table 40-2: XTSB specifications

XTSB model

20 20 9.1 24.0 10.9 20.9 9.5 106 3.0 0.2 A 18 W 49 dBA

50 50 22.7 41.0 18.6 38.1 17.3 665 18.8 0.23 A 23 W 53 dBA

Notes:

• XTSBs ship separately from XT humidiﬁers.

• Noise measurements taken 6.5’ (2 m) in front of XTSB cabinet.

mc_091310_1743

Maximum capacity Shipping weight Operating weight Volume airﬂow

lbs/hr kg/h lbs kg lbs kg cfm m3/min

Current draw at 115V (50/60 Hz)

Input

power

Noise

Page 40 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 45

Dispersion: XT steam blowers

Installation

Mounting XTSB on top of humidifier

The condensate tee kit shipped with the XTSB returns condensate from a top-mounted XTSB to the humidifier's cylinder fill hose. See Figure 41-1. 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 knockout at left rear corner on top of humidifier cabinet.

6. Feeding condensate hose into humidifier cabinet through knockout hole created in Step 5, place XTSB on top of humidifier, and secure XTSB to humidifier with screws provided.

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.

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).

Note: DRI-STEEM recommends securing top-mounted XTSB to the

wall through mounting keyholes on back of XTSB.

For wall mounting the XTSB, see Page 42.

Figure 41-1: Condensate tee kit for top-mounted XTSB

* Supplied with

condensate tee kit

Steam box

Two plastic ties*

Steam port

Condensate hose*

Tee*

5/8" ﬁll hose

(See inset below)

OM-7639

Wiring top-mounted XTSB

1. Connect humidifier terminals L1, L2, STM, C, and GRD to matching XTSB terminals L1, L2, STM, C, and GRD. If needed, refer to external connections diagram shipped with XTSB.

2. Tighten all terminals securely.

Figure 41-2: Top- and remote-mounted XTSB

Mounted on top of humidiﬁer Mounted remotely from humidiﬁer

Condensate returned to steam cylinder ﬁll hose.

mc_091010_0927

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 41

OM-7596

Condensate returned to open drain. Condensate can also be returned to humidiﬁer ﬁll cup.

OM-7597

5/8" ﬁll hose

Condensate from remote XTSB returned to humidiﬁer ﬁll cup

Use DRI-STEEM condensate hose or copper tubing. To avoid foaming, thoroughly ﬂush copper tubing to remove residue before routing to ﬁll cup.

Offset condensate return hose so it is not above overﬂow outlet.

Overﬂow

outlet

Condensate return

OM-7457

OM-7640

Page 46

Installation

WARNING

Standing water in XTSB

Make sure the XTSB 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 XTSB performance;

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

Dispersion: XT steam blowers

Wall mounting XTSB

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

Follow the instructions below for your wall type:

• Wood studs 16" (406 mm) on center:

Attach a spanner board to the wall with screws centered on the studs. Mark hole locations on the spanner board using the dimensions in Table 40-1, and predrill 1/8" (3 mm) diameter pilot holes. Secure the XTSB to the spanner board with the bolts provided.

• Metal studs 16" (406 mm) on center:

Mark hole locations at centers of studs. Using a drill bit just large enough to push a 1/4" (7 mm) bolt through, drill through studs and wall, and through a backing plate on other side of wall. Push bolts through wall, studs, and backing plate. Secure XTSB spanner board with bolts provided.

• If 16" (406 mm) on-center studs are not available:

If 16" (406 mm) on-center studs are not available, mount a spanner board on the wall, spanning two studs. If two horizontal spanner boards are used, locate one at the top of the XTSB for the mounting screws and the other board at the bottom of the XTSB.

• Hollow block or poured concrete wall:

Mark hole locations on the wall using the dimensions in Table 40-1. Drill pilot holes sized for the supplied anchors, and mount the XTSB to the wall with the supplied screws and anchors.

See Table 39-1 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 39). Provide at least 3" (76 mm) of clearance on each side of the XTSB for air intake.

Page 42 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 47

Dispersion: XT steam blowers

Installation

Wiring wall-mounted XTSB

Make the following wiring connections between the humidifier and the XTSB, and tighten all terminals securely:

Connect humidifier terminals L1, L2, STM, C, and GRD to matching XTSB terminals L1, L2, STM, C, and GRD.

Refer to the external connections diagram shipped with the XTSB.

Installing base plate

The XTSB has a base plate for wall-mounted XTSBs to isolate the hot steam box from contact. After the electrical connections are made, assemble the base plate onto the XTSB with the screws provided.

Piping condensate to XT humidifier fill cup cap

1. Remove fill cup cap from XT humidifier, and drill a ½" (13 mm)

hole in fill cup cap for XTSB-20 and XTSB-50 condensate hose as shown in Figure 43-1.

2. Route XTSB 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 43-2. The water seal is required to ensure condensate drainage from the XTSB and to keep steam from blowing out of the condensate hose.

Figure 43-1: Field-installed hole in fill cup cap for remote XTSB

Approximate cap orientation to

front of XT humidiﬁer cabinet

Drill hole here for XTSB condensate hose

OM-7636X

Figure 43-2: XTSB condensate drain hose

XTSB-50 shown

Piping condensate to drain

The XTSB condensate hose must be routed as shown in Figure 43-2. The water seal is required to ensure condensate drainage from the XTSB and to keep steam from blowing out of the condensate hose.

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 the following additional wall-mount XTSB instructions:

“Piping” for XTSBs, beginning on Page 16

“Interconnecting piping requirements,” beginning on Page 24.

Steam box

Condensate

hose

Plastic tie

1” (25 mm)

air gap

Note:

Shown with condensate to open drain. Condensate can also be returned to ﬁll cup through ﬁeld-installed hole in ﬁll cup cap. See Figure 43-1.

mc_091410_1105

7” (178 mm) water seal

Spill funnel (plumb to ﬂoor drain)

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

OM-7600

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 43

Page 48

Installation

Supply water considerations

Electrode humidifiers function very differently from other humidifier technologies. Some of the factors to consider are steam output consistency, efficiency, cylinder life, and start-up time. Understanding these factors and the variables that impact them will result in proper application of this technology.

Output consistency and efficiency

DRI-STEEM’s controller algorithm optimizes steam output consistency, water efficiency, and energy efficiency by managing the frequency and duration of drain and fill events for the supply water being used. The frequency and duration of drain and fill events is proportional to the conductivity of the supply water. Less conductive supply water requires less frequent drain and fill events, resulting in more consistent steam output and more efficient use of energy and water.

Cylinder life

Hard water scale coats the electrodes and eventually requires a cylinder replacement. The harder the water, the more frequent the need for a new cylinder.

Softened water is an option in some facilities. Because softened water ions stay in solution to much higher concentrations than hard water ions, softened water does not coat the electrodes nearly as much as hard water, potentially extending cylinder life.

There are benefits and tradeoffs to consider when the application allows a choice between hard and softened water:

• The benefit of softened water is longer cylinder life (depending on water chemistry), but the trade-off is more frequent drain and fill events.

• The benefit of hard water is less frequent drain and fill events but may result in more frequent cylinder replacement.

Start-up time

Start-up time is how long it takes the humidifier to reach output from a given demand when first installed and after cylinder changes. The more conductive the water, the shorter the start-up time.

Page 44 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 49

Supply water considerations

Operation

Water conductivity and drain and fill events

The paragraphs below explain why steam output consistency, efficiency, cylinder life, and start-up time are impacted by water conductivity and by drain and fill events.

Water conductivity: In electrode humidifiers, 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, DRI-STEEM’s algorithm monitors conductivity and manages drain and fill events to optimize humidifier performance and provide proper steam output.

Drain and fill events: 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 fill event. This rids the cylinder of highly conductive water and replaces it with less conductive fill water. The more conductive the fill water and the higher the demand, the more quickly the threshold is reached, and the more frequently the cylinder automatically drains and fills to stay within the parameters for proper steam output.

mc_091610_1630

Recommended supply water

conductivity for DRI-STEEM

electrode humidifiers is

125 to 1250 μS/cm.

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 45

Page 50

Operation

Principle of operation

Figure 46-1: XT humidifier principle of operation

(ﬁll)

mc_111610_0455

(drain)

OM-7641X

Staging multiple XT humidifiers

Up to four XT humidifiers 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 humidifiers. See the

Installation and Operation Manual

instructions on staging multiple XT humidifiers.

Vapor-logic4

for

1. Controller receives a call for humidity

When the RH level in the humidified space drops below set point, the humidifier 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 fill 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 flows through the water between the electrodes. Electrical resistance in the water causes the water to heat up and boil into steam. The steam flows through the steam outlet and through steam hose, tubing, or piping to the XTSB 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 flow increases. The fill valve remains open until the amperage increases to 10 percent above the current corresponding to the demand signal. Then the fill 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 flow decreases. When current flow decreases to 10 percent below the current corresponding to the demand signal, the fill valve opens to increase the water level in the steam cylinder, which increases current flow and steam production.

5. Controller initiates drain/fill events 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 fill events to keep electrical current within demand parameters. This optimizes humidifier performance based on water conditions and steam production.

The humidifier has integral drain water tempering. Drain water is automatically cooled before entering the drain.

mc_091010_1415

Page 46 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 51

Components

Figure 47-1: XT humidifier components

Fill cup

Connects to inlet at bottom of steam cylinder via ﬁll hose

Overﬂow

Prevents humidiﬁer from overﬁlling

Operation

Vapor-logic4 display

Vapor-logic4 controls all humidiﬁer functions and can connect to a building automation system via Modbus or optional BACnet MS/TP or LonTalk. See the

Vapor-logic4

Installation and Operation Manual

for more information.

Steam outlet

Connection point for steam hose, tubing, or pipe

mc_091010_1416

Steam cylinder

Message prompts user when time to replace

High water sensor

Filling stops if water reaches sensor

Electrodes

Electrical current between electrodes heats water into steam

Fill hose

Cylinder drain

Overﬂow to drain

Water ﬁll line connection

(under cabinet)

OM-7641

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 47

Page 52

Operation

Start-up procedure

WARNING

Electric shock hazard

Only qualiﬁed 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 ﬁre.

Make sure that all electrical covers are in place and secure before turning on electrical power. These include the heater terminal cover, electrical panel cover, and subpanel access panels.

Safety functions

XT humidifiers are protected against running dry — current does not flow 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 humidifier shuts down automatically.

Capacity limitation

XT humidifier capacity can be limited to a user-specified maximum:

Using the keypad/display or Web interface, from the Main menu, and select Tank Setup, then select Capacity Adjustment for menu options.

After the system is installed and connected properly:

1. Verify that the humidifier, controls, piping, electrical

connections, steam supply, and dispersion units(s) are installed according to the following:

• Installation instructions in this manual

• Vapor-logic4 Installation and Operation Manual

– Installation section

– Installation checklist

• Ladder style wiring diagram (inside humidifier cabinet)

• External connections wiring diagram (inside humidifier cabinet)

• All governing codes

2. Verify that all electrical connections are secure before applying power.

3. Make sure all electrical covers are in place and secure. See Warning at left.

4. Verify that the humidifier is mounted level and securely supported before filling with water. See operating weights in Table 4-1.

5. Verify that the humidifier is level front to back and side to side after it is full of water.

6. Read the “Operation” section of the Vapor-logic4 Installation and Operation Manual.

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

7. Perform all applicable “Start-up checklist” items. See Page 49.

8. Monitor humidifier operation through multiple fill cycles. The humidifier operating status appears on the keypad/display.

9. Perform the cleaning procedure as follows:

a. Operate the humidifier long enough for steam to be

produced.

b. Drain the cylinder completely using the keypad/display:

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

c. Restart the humidifier, and repeat Steps a and b.

Page 48 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 53

Start-up checklist

Your humidification system may not have all of the options listed below. If an item does not apply to your system, skip to the next item and continue the process.

☐ Before you start, read this manual and other information sent

with your humidifier.

☐ Verify that the field wiring is done per the instructions in this

manual and per the unit wiring diagram.

☐ Do not use demineralized, deionized, or reverse-osmosis water.

☐ Confirm that all wiring is correct per the wiring diagram.

☐ Confirm that proper grounding and an approved earth ground

are provided.

☐ Confirm that the water fill line was thoroughly flushed before it

was connected to the humidifier.

Operation

The

Vapor-logic4 Installation and Operation

Manual

Refer to it for information regarding the following features:

• Keypad/display and Web interface setup and

• Control input signals and functions

• Safety features

• Alarm screens and fault messages

is a comprehensive operation manual.

menu information

The manual was shipped with your humidifier and is available at our Web site: www.dristeem.com

☐ Turn water supply on and confirm that the drain valve is

closed.

If the force of air exiting the water supply lines blows the fill cup cap off during the first fill cycle, this is not a sign of defect or a cause for concern; simply replace the fill cup cap after all the air has exited the water line.

☐ Turn power on and confirm that the keypad/display is

illuminated.

☐ Confirm that the airflow switch is closed.

☐ If you choose not to use the airflow switch, jumper

AF and 24.

☐ If you choose not to use on-off duct high limit, jumper

24 and DHL.

☐ Confirm that the high limit humidistat input is closed or

that the variable air volume (VAV) control system high limit transmitter is connected.

☐ With sufficient water in the steam cylinder, the airflow switch

closed, the high limit humidistat closed, the door interlock safety switch closed, and a call for humidity, verify that the heat outputs are activated.

☐ Confirm that cleaning procedure (Step 9 on facing page) has

been performed.

☐ If you experience difficulties, see “Troubleshooting” and

“DRI-STEEM Technical Support” on Page 53.

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 49

Page 54

Maintenance

Maintenance procedures

WARNING

Electric shock hazard

Contact with energized circuits can cause severe personal injury or death as a result of electric shock. To prevent shock, disconnect electrical power before performing service or maintenance procedures on an part of the humidiﬁcation system.

When performing maintenance on the humidiﬁer:

• Always switch the keypad control mode to Standby.

• Place all power disconnects in OFF position and lock in OFF position.

• Close the ﬁeld-installed manual supply water shut-off valve.

mc_031110_0444

WARNING

Hot water system

Cylinder and any undrained water may be hot. To avoid injury from hot water, make sure cylinder and humidiﬁer components have cooled before proceeding with maintenance.

Scheduled maintenance

At 500-hour intervals or when “Service interval reached” appears in the Messages Log, inspect the steam cylinder, fill 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 airflow proving switch.

Steam cylinder

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 fill events.

When “Check cylinder” appears in the Messages Log after extended operation, the humidifier 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 onethird full of minerals, or minerals have bridged between electrodes.

To replace the steam cylinder:

1. Close field-installed manual supply water shut-off valve.

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

Drain water is automatically tempered.

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

4. Open cabinet doors. See Warning at left.

Opening and closing cabinet doors

To open the cabinet doors, use a slotted screwdriver to rotate the quarter-turn fastener counterclockwise so the slot is vertical.

To close the doors, close the right then the left door, and push the quarter-turn fastener while turning clockwise so the slot is horizontal.

Page 50 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 55

Maintenance procedures

Maintenance

5. Disconnect steam hose: After cylinder and humidifier components have cooled, loosen

steam hose clamp and disconnect steam hose from cylinder.

6. Disconnect electrode plugs and high water sensor wire.

7. Remove steam cylinder. See “Removing steam cylinder”on Page 10).

8. Check drain valve: If the drain valve port is dirty, clean per instructions on Page 52.

9. Check O-ring. Ensure O-ring in drain valve body is correctly placed. Change

O-ring if necessary. Dampen O-ring seals with water before replacing cylinder. Do not use lubricant or other substance.

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

11. Connect steam hose to cylinder.

Note:

It is advisable to keep a spare steam cylinder in stock during the humidification season. See “Replacement parts" on Pages 55 and 57 for part numbers.

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

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 51

Page 56

Maintenance

Maintenance procedures

Figure 52-1: Drain valve assembly

Drain valve body

Drain valve coil

Drain cup plate

Insert

Ground plate

Drain cup

OM-7630

Verify that

• ground plate is in groove of drain cup,

• insert is in place through ground plate loop.

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

Drain valve

Always check the drain valve to determine whether it should be cleaned before installing a new steam cylinder. Typically, the drain valve port is as dirty as the used steam cylinder.

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

2. Remove the three screws and washers securing drain cup plate to drain cup (see Figure 52-1).

3. Disconnect 2-pin Molex plug from 24 VAC drain valve coil. Note locations for reassembly.

4. Remove hose clamp and hose from drain valve body. Take drain valve assembly to a sink for disassembly and cleaning.

5. Slide black, plastic cap off the drain valve coil. Remove hex nut on top of coil, and slide coil off actuator (see Figure 52-2).

6. Loosen actuator with a wrench and unscrew from plastic valve body.

7. Clean exposed plunger, spring, actuator, and plastic drain valve body with clean water.

8. Reassemble. Tighten actuator 1/8 turn past hand tight.

9. Clean out end of hose. Reconnect it to drain valve body with the hose clamp.

10. Read note in Figure 52-1, then fit mounting screws with washers, and insert through drain cup plate.

11. Plug Molex plug into its mating wire harness plug.

Figure 52-2: Drain valve body

Drain valve body

Plunger

Spring

Actuator

Drain valve coil

Nut

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

Page 52 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Cap

OM-7631

Page 57

Troubleshooting

1. Review possible causes and recommended actions in the Vapor-logic4 Installation and Operation Manual.

2. If you are still having problems, call us. If the Troubleshooting guide does not help you solve the

problem, call us with the following information available:

• Product name, firmware version, and serial number The product name and serial number are on the nameplate

on the right side of the XT humidifier and XTSB. To access the firmware version: Keypad/display: Select Diagnostics in the Main menu, select

Humidifier info, scroll down to Firmware version. Web interface: Click Diagnostics in the toolbar, click

Humidifier info, see Firmware version below.

• Problem definition Example: water leaking, low humidity, high humidity, etc.

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

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

change in maintenance, etc.

Maintenance

DRI-STEEM Technical Support

Have the following information ready before calling Technical Support (at 800-328-4447):

Humidifier model number _________________________________

Humidifier serial number _________________________________

Firmware version ________________________________________

Problem definition _______________________________________

When problem began _____________________________________

Error codes and quantity/frequency of codes __________________

_______________________________________________________

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 53

Page 58

Maintenance

Figure 54-1: XT humidifier models 5 through 100 replacement parts

Replacement parts: XT humidifier models 5 through 100

Back subpanelSide subpanel

OM-7632

OM-7633

Grounding lug

Page 54 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 59

Replacement parts: XT humidifier models 5 through 100

Table 55-1: XT humidifier models 5 through 100 replacement parts

Item Description Part No.

1 Switch, door interlock 530010-002

Transformer, 208/240/480 to 24 VAC 408965-001 Transformer 277 to 24 VAC 408982

Transformer, 600 to 24 VAC 408986 Transformer, 230/400 to 24 VAC 408985 Contactor - 24 VAC - 35 A 407010-001

Contactor - 24 VAC - 55 A 407010-002

4 Plug, max. water level sensor 530010-105

Board, current sensing, 208/240/277 V (XT-5 only) 530013-001 Board, current sensing, 400/480 V 530013-002

Board, current sensing, 600 V 530013-003

Board, current sensing, 208/230/240/277 V 530013-004 6 Vapor-logic4 display board 408495-004 7 Vapor-logic4 main board 408495-001 8 Electrode wiring kit (plugs with wires: 1 red, 1 black, 1 white) 194625-001 9 Breaker, 1 pole, 0.5 A, 277/480 V, D curve 406775-010

Kit, Cylinder, XT-5/10, 120-277 V, 1 phase 194601-001

Kit, Cylinder, XT-10, 480 V, 1 phase 194601-002

Kit, Cylinder, XT-10, 600 V, 1 phase 194601-003

Kit, Cylinder, XT-10, 208/240 V, 3 phase 194601-004

Kit, Cylinder, XT-10, 400 V, 3 phase 194601-005

Kit, Cylinder, XT-10, 480 V, 3 phase 194601-006

Kit, Cylinder, XT-10, 600 V, 3 phase 194601-007

Kit, Cylinder, XT-20, 208-277 V, 1 phase 194601-008

Kit, Cylinder, XT-20, 480 V, 1 phase 194601-009

Kit, Cylinder, XT-20, 600 V, 1 phase 194601-010

Kit, Cylinder, XT-20, 208-277 V, 3 phase 194601-011

Kit, Cylinder, XT-20, 400 V, 3 phase 194601-012

Kit, Cylinder, XT-20, 480 V, 3 phase 194601-013

Kit, Cylinder, XT-20, 600 V, 3 phase 194601-014

Kit, Cylinder, XT-30, 208/240 V, 3 phase 194601-015

Kit, Cylinder, XT-30, 400 V, 3 phase 194601-016

Kit, Cylinder, XT-30, 480 V, 3 phase 194601-017

Kit, Cylinder, XT-30, 600 V, 3 phase 194601-018

Kit, Cylinder, XT-50, 208/240 V, 3 phase 194601-019

Kit, Cylinder, XT-50 ,400 V, 3 phase 194601-020

Kit, Cylinder, XT-50, 480/600 V, 3 phase 194601-022

Kit, Cylinder, XT-75, 400 V, 3 phase 194601-023

Kit, Cylinder, XT-75, 480/600 V, 3 phase 194601-025

Kit, Cylinder, XT-100, 400 V, 3 phase 194601-026

Kit, Cylinder, XT-100, 480/600 V, 3 phase 194601-028

11 Strainer, cylinder 531006 12 Drain valve assembly (see parts in Figure 52-1) 194610-001

Fill valve assembly XT-5/10 194622-001

Fill valve assembly XT-20/30/50 194622-002

Fill valve assembly XT-75/100/150/200 194622-003

14 Fill cup extension kit (see parts in Figure 11-1) 194605-100 15 Clip, quarter-turn fastener 700458-003 16 Relay socket 407900-019 17 Relay, DPDT, Finder 407900-016

Maintenance

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 55

Page 60

Maintenance

Figure 56-1: XT humidifier models 150 and 200 replacement parts

Replacement parts: XT humidifier models 150 and 200

Back subpanel

Side subpanel

OM-7635

Grounding lug

Page 56 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

OM-7634

Page 61

Replacement parts: XT humidifier models 150 and 20

Table 57-1: XT humidifier models 150 and 200 replacement parts

Item Description Part No.

1 Switch, door interlock 530010-002

Transformer, 208/240/480 to 24 VAC 408965-001 2

Transformer, 600 to 24 VAC 408986

Transformer, 230/400 to 24 VAC 408985

Contactor - 24 VAC - 35 A 407010-001 3

Contactor - 24 VAC - 55 A 407010-002 4 Plug, max. water level sensor 530010-105

Board, current sensing, 400/480 V 530013-002 5

Board, current sensing, 600 V 530013-003 6 Vapor-logic4 display board 408495-004 7 Vapor-logic main board 408495-001 8 Electrode wiring kit (plugs with wires: 1 red, 1 black, 1 white) 194625-001 9 Breaker, 1 pole, 0.5 A, 277/480 V, D curve 406775-010

Kit, Cylinder, XT-75, 400 V, 3 phase (order 2 for XT-150) 194601-023

Kit, Cylinder, XT-75, 480/600 V, 3 phase (order 2 for XT-150) 194601-025

Kit, Cylinder, XT-100, 400 V, 3 phase (order 2 for XT-200) 194601-026

Kit, Cylinder, XT-100, 480/600 V, 3 phase (order 2 for XT-200) 194601-028

11 Strainer, cylinder 531006 12 Drain valve assembly (see parts in Figure 52-1) 194610-001 13 Fill valve assembly XT-75/100/150/200 194622-003 14 Fill cup extension kit (see parts in Figure 11-1) 194605-100 15 Clip, quarter-turn fastener 700458-003 16 Relay socket 407900-019 17 Relay, DPDT Finder 407900-016

Breaker, 40 A 406776-040

Breaker, 50 A 406776-050

Breaker, 63 A 406776-063

Maintenance

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 57

Page 62

Maintenance

Figure 58-1: XTSB-20 and XTSB-50 replacement parts

XTSB-50 shown

Replacement parts: Steam blowers XTSB-20 and XTSB-50

Page 58 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

OM-7638

Page 63

Replacement parts: Steam blowers XTSB-20 and XTSB-50

Table 59-1: XTSB-20 and XTSB-50 replacement parts

Item Description Part No.

Fan (XTSB-20) 407109-001 1

Fan (XTSB-50) 306376

2 Breaker, 0.5A, 480V 406775-010

3 Finder relay socket 407900-019

4 Finder relay 407900-016

Transformer, XTSB-20, 208/240/277V 408963-001

Transformer, XTSB-20, 480V 408963-002

Transformer, XTSB-20, 600V 408963-003

Maintenance

Transformer, XTSB-50, 208/240/277V 408963-011

Transformer, XTSB-50, 480V 408963-012

Transformer, XTSB-50, 600V 408963-013

Transformer, XTSB-20/50, 230/400V 408963-014

6 Clip, quarter-turn fastener 700458-003

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 59

Page 64

Warranty

Expect quality from the industry leader

For more than 45 years, DRI-STEEM has been leading the industry with creative and reliable humidification solutions. Our focus on quality is evident in the construction of the XT humidifier. DRI-STEEM 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 production information visit our web site:

www.dristeem.com

DRI-STEEM Corporation

An ISO 9001:2000 certified company

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

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

Continuous product improvement is a policy of DRI-STEEM Corporation; therefore, product features and specifications are subject to change without notice.

DRI-STEEM, Rapid-sorb, and Ultra-sorb are registered trademarks of DRI-STEEM Corporation and are filed 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.

Two-year Limited Warranty

DRI-STEEM Corporation (“DRI-STEEM”) 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 twenty-seven (27) months from the date DRI-STEEM ships such product, whichever date is the earlier.

If any DRI-STEEM product is found to be defective in material or workmanship during the applicable warranty period, DRI-STEEM’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 DRI-STEEM’s election. DRI-STEEM 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 humidifiers.

DRI-STEEM’s Limited Warranty shall not be effective or actionable unless there is compliance with all installation and operating instructions furnished by DRI-STEEM, or if the products have been modified or altered without the written consent of DRI-STEEM, or if such products have been subject to accident, misuse, mishandling, tampering, negligence or improper maintenance. Any warranty claim must be submitted to DRI-STEEM in writing within the stated warranty period. Defective parts may be required to be returned to DRI-STEEM.

DRI-STEEM’s Limited Warranty is made in lieu of, and DRI-STEEM 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.

DRI-STEEM 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 DRI-STEEM has notice of the possibility of such damages.

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

Extended warranty

The original user may extend the term of the DRI-STEEM Limited Warranty for a limited number of months past the initial applicable warranty period and term provided in the first 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.

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

mc_051308_0630

Form No. XT-IOM-1210 Part No. 890000-140 Rev D

Page 60 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

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