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

...

Electrode Steam Humidifier

Installation, Operation,

and Maintenance Manual

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.

mc_011909_1215

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

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.

mc_011909_1135

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.

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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

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

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

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

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

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

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

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

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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

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.

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

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

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

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

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

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

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

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

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

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

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

Specifications and Main Features

Frequently Asked Questions

User Manual