DriSteem XT-10, XT-20, XT-100, XT-30, XT-150 Installation, Operation And Maintenance Manual

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Page 1

XT Series

Electrode Steam Humidifier

Installation, Operation,

and Maintenance Manual

Page 2

Safety precautions

ATTENTION INSTALLER

Read this manual before installing humidifier.

Leave manual with product owner.

DRI-STEEM technical support

800-328-4447

WARNING!

is product must be installed by qualied HVAC and electrical contractors and in compliance with local, state, and federal codes. Improper installation may cause property damage, severe personal injury, or death as a result of electric shock, burns, and/or re.

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

Page 3

Table of contents

Installation

Specifications ........................................... 2

Dimensions ............................................ 3

Choosing a location .....................................4

Mounting the humidifier .................................5

Fill cup extension installation ............................. 7

Supply water and drain piping ............................8

Field wiring ...........................................11

Humidistat and transmitter placement ....................13

Wiring diagrams ....................................... 14

Dispersion ............................................20

General instructions

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

Interconnecting piping requirements ..................21

Drip tee installation ................................24

Single Tube and Multiple Tube .......................25

Rapid-sorb

........................................29

XT Steam Blower

................................20

................................... 36

Operation

Principle of operation ..................................44

End-of-season drain ....................................45

Extended shutdown ....................................45

Safety functions ........................................45

Display panel operation .................................46

Operating modes ......................................47

Sequenced application ..................................54

Humidifier start-up ....................................54

System messages .......................................56

Maintenance

Maintenance procedures

................................58

Troubleshooting .......................................61

Replacement parts .....................................65

Two-year limited warranty .......................Back cover

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

Page 4

Table 2-1: XT Series humidifier specifications

Installation: Specifications

Model

number kW

XT-10 3.4 10 4.5 16.2 14.0 12.2 7.0 5.6 9.4 8.1 4.1 3.2 27.6 12.5 29.8 13.5

XT-20 6.7 20 9.1 32.2* 27.9* 24.2 14.0 11.2 18.6 16.1 8.1 6.4 29.8 13.5 38.6 17.5

XT-30 10.1 30 13.6 —————28.0 24.3 12.1 9.7 43.0 19.5 70.5 32

XT-50 16.8 50 22.7 —————46.6 40.4 20.2 16.2 43.0 19.5 70.5 32

XT-75 25.1 75 34.0 ———————30.3 24.2 65.0 29.5 114.6 52

XT-100 33.5 100 45.4 ———————40.4 32.3 67.2 30.5 116.8 53

XT-150 50.3 150 68.0 ———————

XT-200 67.0 200 90.7 ———————

Maximum

steam capacity

lbs/hr kg/h 208V 240V 277V 480V 600V 208V 240V 480V 600V lbs kg lbs kg

Single-phase Three-phase

Current draw (amps)

2 ×

30.3**

2 ×

40.4**

2 ×

24.2**

2 ×

32.3**

Shipping

weight

137.8 62.5 242.5 110

142.2 64.5 246.9 112

Maximum operating

weight

Note:

* For these models, shipping weight = 43 lbs (19.5 kg) and maximum operating weight = 70.5 lbs (32 kg) ** Double units require two circuits.

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

Page 5

Installation: Dimensions

Figure 3-1: Dimensions

Models XT-10, XT-20, XT-30, XT-50, XT-75, XT-100 Models XT-150, XT-200

Top view

1.8"

Front view

Bottom view

Water ﬁll line connection

1.8"

Drain

1.4" G

Table 3-1: Dimensions by model number

Dispersion outlet

4.5"

7.8"

17.4"

Electrical knockouts

4.3"

1.5"

OM-7374

Top view

Front view

Bottom view

1.8"

Drain

Water ﬁll line connection

1.4" 1.4"

Dispersion outlet

1.8"

Electrical knockouts

OM-7419

XT-10

Callout

A 14.5 368 17.4 442 18.9 480 38.9 988

B 22.9 581 24.9 632 26.9 683 26.9 683

C 8.4 213 11.7 297 14.3 363 14.3 363

D 10.0 254 12.8 325 14.4 366 14.4 366

E 5.5 140 6.9 175 7.3 185 7.3 185

F 4.0 102 5.8 147 6.8 173 6.8 173

G 5.5 140 6.9 175 7.3 185 7.3 185

H 4.0 102 5.8 147 6.8 173 6.8 173

J 4.0 102 7.5 191 8.8 224 8.8 224

K 32.9 836 34.9 886 36.9 937 36.9 937

Note:

* Dimension K includes 10" (254 mm) for a ﬁll cup extension. A ﬁll cup extension is a required component when the humidiﬁer is connected to a Rapid-sorb or Ultra-sorb dispersion

assembly or when the maximum developed length of piping/hose from humidiﬁer to dispersion assembly/blower is more than 20' (6 m).

** XT-20 models using 208V single-phase power or 240V single-phase power have dimensions equal to Models XT-30 and XT-50.

XT-20**

inches mm inches mm inches mm inches mm

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

XT-30 XT-50

XT-75

XT-100

XT-150 XT-200

Page 6

Choosing a location

Important:

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

Maximum ambient temperature: 104

Minimum ambient temperature: 41

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

Note:

To open the humidifier electrical access door, rotate the screw counter-clockwise ¼ turn. The door pivots toward the front of the unit from the bottom of the door. To close the electrical access door, position screw slot so that it is horizontal and then push the door shut. Make sure sides of painted door go outside stainless steel enclosure.

To open the humidifier steam cylinder access door, rotate the screw counter-clockwise ¼ turn, lift door out of position, and remove ground wire. Replace door in reverse order of these instructions.

Figure 4-1: Recommended minimum clearances

°F (40 °C)

°F (5 °C)

Choosing a location for the humidifier

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

•

Proximity to duct

Install the humidifier near the air duct system where the

dispersion assembly will be located. The maximum recommended length for vapor 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). See the dispersion section of this manual for more information about installing dispersion assemblies.

• 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 as shown in Figure 24-1. Before installing a dispersion assembly or interconnecting piping, review all pitch requirements in the dispersion section of this manual.

•

Required clearances (see Figure 4-1)

•

Electrical connections

Electrical power supply connections are made at the bottom panel

corner of the electrical enclosure. The system wiring is inside the cover of the control cabinet. See the field wiring instructions starting on Page 11.

• Supply water and drain piping connections

Water supply piping connections are made on the bottom left

side of the unit. Drain piping connections are made at the bottom center of unit. See the field piping illustration and instructions starting on Page 8.

• Exterior wall insulation

Do not install the humidifier on an exterior wall unless that wall

is properly insulated.

Top: 16" (400 mm)

Side: 4" (100 mm)

Floor: 16" (400 mm)

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

Between units: 4" (100 mm)

Front: 36" (914 mm)

OM-7359

Choosing a location for the dispersion assembly and control devices

See Page 20 for recommended installation locations for the dispersion assembly. See Page 13 for recommended installation locations for control devices such as humidistats and transmitters.

Page 7

Mounting the humidifier

Figure 5-1: Mounting keyhole locations by model number

Models XT-10, XT-20, XT-30, XT-50, XT-75, XT-100 Models XT-150, XT-200

WARNING!

Mount humidiﬁer per the instructions in this manual and to a structurally stable surface. Improper mounting of humidiﬁer may cause the humidiﬁer to fall off the wall resulting in severe personal injury or death.

OM-7360

Table 5-1: Mounting dimensions

XT-10

XT-20*

inches mm inches mm inches mm inches mm

A 3.9 99 7.1 180 7.5 191 7.5 191

XT-30 XT-50

XT-75

XT-100

XT-150 XT-200

OM-7420

B 14 356 16.3 414 19.1 485 19.1 485

C 3.1 79 3.6 91 3.4 86 3.4 86

D 3 76 2.1 53 3.4 86 3.4 86

E 2.8 71 3 76 2.8 71 2.8 71

F 3.8 97 3.2 81 2.6 66 2.6 66

G — — — — — — 17.1 434

Note:

* XT-20 models using 208V single-phase power or 240V single-phase power have

dimensions equal to Models XT-30 and XT-50.

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

Page 8

WARNING!

Mounting the humidifier (continued)

Prepare humidifier for mounting

Unpack unit from shipping carton and remove steam cylinder door. Disconnect electrode and high water sensor connectors from steam cylinder. Pull pins from brackets that retain steam cylinder. Remove steam cylinder from drain valve body.

Mount humidifier

Mount the humidifier so that it is plumb. See Figures 8-1 and 9-1 for an installation overview.

When mounting on a wood stud wall (studs 16" [406 mm] on center), locate studs and attach spanner board so that each of the screws centers on a stud. Mark hole locations per Table 5-1 and predrill 1/8" (3 mm) diameter pilot holes. Secure cabinet to spanner board with screws provided.

When mounting on a metal stud wall, locate the studs (16" [406 mm] on center) and drill a ¼" (6 mm) hole through the studs and wall. Mount spanner board with ¼" (6 mm) bolts through the wall, studs, and a backing plate on the backside of the wall and secure with a nut and washer.

If 16" (406 mm) on-center studs are not available, mount spanner boards on the wall, spanning two studs. If two horizontal boards are used, locate one at the top of the cabinet for the mounting screws and the other board located 3.5" (89 mm) on center from the bottom of the cabinet.

For hollow block or poured concrete wall mounting, mark mounting holes per Table 5-1. Drill pilot holes sized for the proper concrete anchors. Secure cabinet in place using four screws.

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

Page 9

Fill cup extension installation

Install fill cup extension kit (if applicable)

A fill cup extension kit is required with all Rapid-sorb and Ultra-sorb dispersion assemblies or when the maximum developed length of piping/hose from humidifier to dispersion assembly/ blower is more than 20' (6 m).

1. Remove hose clamps attached to fill cup extension bracket.

2. Remove Phillips screw near large opening on top enclosure and retain for use in Step 4.

3. Feed tubes through left rear opening on top of steam cylinder enclosure.

4. Mount bracket with screw from Step 2 (see Figure 7-1).

5. Slip smaller hose clamp (D18) from Step 1 over smaller diameter hose and slide open end of hose onto fill valve body connection. Tighten hose clamp.

6. Slip larger hose clamp (D21) from Step 1 over larger diameter hose (the one attached to cone bottom of fill cup) and slide open end of hose onto drain valve body connection. Tighten hose clamp.

7. Place overflow tube with elbow into hole of drain cup plate.

Replace steam cylinder

1. Slide steam cylinder (with warning label facing toward operator) into drain valve body while making sure side tabs engage brackets.

2. Reconnect electrode and high water sensor connectors to steam cylinder (refer to unit wiring diagram located in electrical enclosure).

Figure 7-1: Fill cup extension installation

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

OM-7385

Page 10

Supply water and drain piping

Figure 8-1: Field piping overview for models XT-10, XT-20, XT-30, XT-50, XT-75, and XT-100

Steam vapor hose; may also use tubing or pipe. See Table 22-1 for maximum piping lengths. Tubing or pipe must be grounded.

Fill valve (with screen)

Continuous copper water supply line; water pressure must be between 25 psi and 80 psi (175 kPa and 550 kPa)

Shock arrester recommended to reduce water hammer, by installer

Adapter

Pitch 1/8”/ft (1%)

Inlet strainer, by installer

Supply valve, by installer

¾" (DN20) metallic drain piping. If piping run is over 10' (3 m) increase pipe to 1¼" (DN32).

Install plumb

towards drain

Spill funnel. Plumb to ﬂoor drain

Refer to governing codes for drain pipe size and maximum discharge water temperature. Offset humidiﬁer from spill funnel to prevent ﬂash steam from rising into the humidiﬁer.

Hose and clamps

3/8" (DN10) O.D. copper; compression ﬁtting on ﬁll valve

1" (25 mm) air gap required

WARNING!

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

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

OM-7362

Supply water quality

XT Series humidifiers use normal tap water or softened water to generate humidification steam. Water conductivity must be within the range of 125 to 1250 μS/cm (which, in many cases, is roughly equivalent to 3.4 to 36.3 grains/gallon). Demineralized water cannot be used because it is not conductive. Do not use heated supply water because unheated supply water is required for drain water tempering.

Page 11

Supply water and drain piping (continued)

Figure 9-1: Field piping overview for Models XT-150 and XT-200

Steam vapor hose; may also use tubing or pipe. See Table 22-1 for maximum piping lengths. Tubing or pipe must be grounded.

Adapter

Install plumb

Fill valve (with screen)

Continuous copper water supply line; water pressure must be between 25 psi and 80 psi (175 kPa and 550 kPa)

Shock arrester recommended to reduce water hammer, by installer

Inlet strainer, by installer

Supply valve, by installer

Pitch 1/8”/ft (1%)

towards drain

3/8" (DN10) O.D. copper; compression ﬁtting on ﬁll valve

Supply water piping

Use only copper for supply water piping—do not use rubber or plastic. A strainer is recommended to be installed in the supply piping before the fill valve. The fill valve connection size is a 3/8" (DN10) compression fitting. In cases where water hammer may be a possibility, consider installing a shock arrestor. Water pressure must be between 25 psi and 80 psi (175 kPa and 550 kPa).

¾" (DN20) metallic drain piping up to second drain connection, then increase pipe to 1¼" (DN32)

1" (25 mm) air gap required

Spill funnel. Plumb to ﬂoor drain

Refer to governing codes for drain pipe size and maximum discharge water temperature. Offset humidiﬁer from spill funnel to prevent ﬂash steam from rising into the humidiﬁer.

Hose and clamps

OM-7362

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 the humidifier to not reach required steam capacity.

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

Page 12

Supply water and drain piping (continued)

Figure 10-1: Drain piping detail

Drain cup

Hose clamp (ﬁeld supplied)

¾" (DN20) copper

Note:

* A D29 bolt hose clamp and black rubber hose

ship with each humidiﬁer. These parts can also be ordered from DRI-STEEM. See the replacement parts section of this manual for part numbers.

D29 bolt hose clamp

Black rubber hose

Pitch 1/8”/ft (1%) towards drain

Open drain

1" (25 mm) air gap

OM-7379

Humidifier drain piping

Drain piping must be code-approved copper or steel rated for 212 °F (100 °C) minimum. The final connection size is ¾" (DN20) copper for the steam cylinder drain. Do not reduce this connection size.

See Figures 8-1 and 9-1 for typical installation dimensions and requirements.

If drainage by gravity is not possible, use a reservoir pump rated for 212 °F (100 °C) water.

A 10" (254 mm) piece of hose is provided to function as the flexible connection from the drain cup to the field installed drain plumbing. A D29 hose clamp is provided to secure the drain hose to the drain cup.

See Figure 10-1 for drain piping detail.

If the equivalent length of pipe from the humidifier drain to the plumbing system drain is more than 10' (3 m), increase the pipe size to 1¼" (DN32).

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

Page 13

Field wiring

Humidifier field wiring

All wiring must be in accordance with all governing codes and with the unit wiring diagram. The unit wiring diagram is inside the electrical control cabinet. Power supply wiring must be rated for 105 °C.

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.

Field wiring connections and requirements

Conduit knockouts are provided on the bottom of the electrical control cabinet. Control wiring knockouts are on the bottom front; power wiring knockouts are on the bottom rear.

CAUTION! Adding alternate conduit connections is not

recommended; however, if making holes and knockouts in the humidifier cabinet, protect all internal components from debris and vacuum out cabinet when finished. Failure to comply with this caution can damage sensitive electronic components and void the DRI-STEEM warranty.

WARNING!

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.

Figure 11-1: Field wiring requirements

Power supply

Fused disconnect

Humidiﬁer

Control component placement

Follow the guidelines on Page 13 for placing humidistats, transmitters, and airflow proving switches.

More on next page ▶

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

Page 36

Dispersion: Rapid-sorb (continued)

Assembly and installation instructions for a Rapid-sorb installed with header inside the duct (continued)

• Rotate the slip coupling as you push it on to the tubing.

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

• 1½'' (DN40) dispersion tubes

– The header pitch is duplicated in the L-bracket. – The dispersion tube and slip coupling must be fully engaged

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

– The high end of the L-bracket can be fastened tight to the

duct or air handler.

– On the low end of the L-bracket, the fastener must be long

enough to compensate for the pitch, and a nut should be provided and secured on both sides of the L-bracket and the duct or air handler for stability.

• 2" (DN50) dispersion tubes

– Fasten the bracket to the top of the duct or air handler and

use the hose cuffs to compensate for the pitch of the header.

– Before securing the hose cuff in place, with the hose clamps

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

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

8. Verify that all fasteners are secure:

• L-bracket to duct

• Dispersion tubes to L-bracket

• Hose clamps on 2" (DN50) tubes

• Header support bracket fastener

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

Page 37

Dispersion: Rapid-sorb (continued)

Steam supply connections to the Rapid-sorb header

1. 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.

2. 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.

• Route the necessary number of steam supplies from the

humidifier steam cylinders to the steam supply connector.

• Position the steam supply connector to accept the steam

supplies while maintaining the necessary pitch.

• Make sure the hose clamps on the steam supply connector and

header are tight.

Condensate drain connections to the Rapid-sorb header

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

2. Condensate drain line must be piped as shown in the figures on the previous pages. 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

3. 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.

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

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

Page 38

Figure 36-1: XT Steam Blower dispersion

Mounted on top of the humidiﬁer Mounted remotely from the humidiﬁer

Dispersion: XT Steam Blowers

XT Steam Blower

XT Series humidiﬁer

OM-7422

Table 36-1: Number of XT Steam Blowers required, by humidifier model*

Humidiﬁer

model

XT-10 1 —

XTSB-20 units/kit

XTSB-50 units/kit

XT Steam Blower

XT Series humidiﬁer

OM-7423

XT Steam Blowers

XT Steam Blowers (XTSB), designed for use in finished spaces, disperse steam into large open spaces and are particularly useful where there are no air-handling ducts.

There are two XTSB models: XTSB-20, for capacities up to 20 lbs/hr (9.1 kg/hr), and XTSB-50, for capacities up to 50 lbs/hr (22.7 kg/hr).

XT-20** 1 —

XT-30 — 1

XT-50 — 1

XT-75 — 2

XT-100 — 2

XT-150 — 4

XT-200 — 4

Notes:

* XT Steam Blowers are sold as kits to match the

associated XT Series humidiﬁer. The number of XT Steam Blower units per kit are shown in this table.

** XT-20 models using 208V single-phase power or

240V single-phase power require one XTSB-50 steam blower.

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

XT Series humidifiers can be configured to operate with one or more XT Steam Blowers. See Table 36-1 for configuration information. Multiple XTSB-50 Steam Blowers are used with XT-75 and larger units in a remote configuration.

Page 39

Dispersion: XT Steam Blowers (continued)

As steam is discharged from the XT Steam blower (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 this fog contacts solid surfaces (columns, beams, ceiling, pipes, etc.) before it disappears, it can collect and drip as water. The greater the space relative humidity, the more the fog will rise, spread, and throw.

The table below lists the maximum rise, spread, and throw nonwetting distances for XT Series humidifiers with an XTSB at 40%, 50%, and 60% RH in the space. Surfaces cooler than ambient temperature, or objects located within this minimum dimension, can cause condensation and dripping. To avoid steam impingement on surrounding areas, observe the minimum non-wetting distances in the table below.

The XTSB-20 contains an 63 cfm (1.8 m

/min) blower (115V,

single-phase, 50/60 Hz) and the XTSB-50 contains a 500 cfm

(14.2 m

/min) blower (115V, single-phase, 50/60 Hz) field wired to the XT Series humidifier blower terminals. A wiring diagram of the XTSB is included with each unit.

On a call for humidity, the humidifier begins producing steam and the contactor energizes the XTSB blower. When the call for humidity is satisfied, the contactor opens and the blower is deenergized.

Steam outlet

Figure 37-1: XT Steam Blower rise, spread, throw

Air intake grille

Steam outlet

Rise

Spread

Throw

Air intake grille

OM-7424

Table 37-1: XT Steam Blower minimum non-wetting distances

Maximum

steam

Model

XT-10 10 4.5 1.5 0.5 2.0 0.6 6.0 1.8 2.0 0.6 2.5 0.8 7.0 2.1 2.5 0.8 3.0 0.9 8.0 2.4

XT-20 20 9.1 2.0 0.6 2.5 0.8 6.5 2.0 2.5 0.8 3.0 0.9 7.5 2.3 3.0 0.9 3.5 1.1 8.5 2.6

XT-30 30 13.6 2.5 0.8 3.0 0.9 7.0 2.1 3.0 0.9 3.5 1.1 8.0 2.4 3.5 1.1 4.0 1.2 9.0 2.7

XT-50 50 22.7 3.0 0.9 3.5 1.1 8.0 2.4 3.5 1.1 4.0 1.2 9.0 2.7 4.0 1.2 4.5 1.4 10.0 3.0

XT-75 75 34.0 3.0 0.9 3.5 1.1 8.0 2.4 3.5 1.1 4.0 1.2 9.0 2.7 4.0 1.2 4.5 1.4 10.0 3.0

XT-100 100 45.4 3.0 0.9 3.5 1.1 8.0 2.4 3.5 1.1 4.0 1.2 9.0 2.7 4.0 1.2 4.5 1.4 10.0 3.0

XT-150 150 68.0 3.0 0.9 3.5 1.1 8.0 2.4 3.5 1.1 4.0 1.2 9.0 2.7 4.0 1.2 4.5 1.4 10.0 3.0

XT-200 200 90.7 3.0 0.9 3.5 1.1 8.0 2.4 3.5 1.1 4.0 1.2 9.0 2.7 4.0 1.2 4.5 1.4 10.0 3.0

Notes:

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

capacity

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

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

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

Page 40

Dispersion: XT Steam Blowers (continued)

Table 38-1: XT Steam Blower dimensions

Dimen-

sion

A 10.0 254 12.75 324

B 6.0 152 11.38 289

C 8.25 210 11.63 295

D 3.0 76 2.88 73

E 3.94 100 7.06 179

F 2.0 51 5.88 149

XTSB-20 XTSB-50

inches mm inches mm

Figure 38-1: XT Steam Blower dimensions

Front view Side view Back view

OM-7428

Mounting the XT Steam Blower

The XT Steam Blower can be mounted directly on top of an XT Series humidifier cabinet or remotely from the humidifier.

Installation must comply with governing codes.

Mount the steam blower so that it is plumb.

When mounting on a wood stud wall (studs 16" [406 mm] on center), locate studs and attach spanner board so that each of the screws centers on a stud. Mark hole locations per Table 38-1 and predrill 1/8" (3 mm) diameter pilot holes. Secure cabinet to spanner board with screws provided.

For hollow block or poured concrete wall mounting, mark holes per Table 38-1. Drill pilot holes sized for the supplied anchors. Secure cabinet in place using the two supplied screws and anchors.

More on next page ▶

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

Page 41

Dispersion: XT Steam Blowers (continued)

To determine steam blower mounting clearance dimensions, see Table 37-1 on Page 37 to determine minimum rise, spread, and throw non-wetting distances for your application. Make sure walls, ceilings, or other obstructions are not within this region, or condensation and dripping could occur (see instructions on Page

37). Provide at least 4" (102 mm) clearance on each side of the XT Steam Blower for air intake.

Field wiring is required to connect the XT Steam Blower fan to the humidifier blower terminals. Refer to the external connections diagram in the package shipped with the unit.

For mounting the XT Steam Blower remotely from the humidifier, see the tables in this document for interconnecting piping requirements.

Figure 39-1: Piping connections to XT Steam Blowers

XT Steam Blower mounted remotely

Plastic tie

Condensate hose (purchased separately from DRI-STEEM)

Water seal

Plastic tie

OM-7426

To open drain

Bolt hose clamp (supplied with steam blower)

White braided hose (purchased separately from DRI-STEEM)

Bolt hose clamp (supplied with humidiﬁer)

XT Steam Blower mounted directly on top of XT Humidiﬁer

Bolt hose clamp (supplied with steam blower)

Condensate hose (attached to steam blower)

Bolt hose clamp (supplied with humidiﬁer)

White braided hose (supplied with humidiﬁer)

OM-7427

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

Page 42

Figure 40-1: Piping from steam cylinders to XT Steam Blowers

Plastic tie

Dispersion: XT Steam Blowers (continued)

XT Steam Blower

1-3/8" O.D. steam hose by DRI-STEEM

XT-100 Humidiﬁer

7" (178 mm) water seal (typ.)

Plastic tie

To open drain

Pitch 2"/ft (15%) min.

To open drain

Bolt hose clamp (supplied with blower)

Bolt hose clamp (supplied with humidiﬁer)

Condensate hose by DRI-STEEM

Plastic tie

OM-7438

XT Steam Blower

1-3/8" O.D. steam hose by DRI-STEEM

XT-200 Humidiﬁer

7" (178 mm) water seal (typ.)

To open drain

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

To open drain

Pitch 2"/ft (15%) min.

To open drain

Bolt hose clamp (supplied with blower)

Bolt hose clamp (supplied with humidiﬁer)

Condensate hose by DRI-STEEM

Plastic tie

To open drain

OM-7439

Page 43

Dispersion: XT Steam Blowers (continued)

Figure 41-1: Piping from steam cylinders to XT Steam Blowers

Plastic tie

XT Steam Blower

1-3/8" O.D. steam hose by DRI-STEEM

Adaptor (supplied by DRI-STEEM)

XT-75 Humidiﬁer

7" (178 mm) water seal (typ.)

Plastic tie

1-3/8" O.D. steam hose by DRI-STEEM

Adaptor (supplied by DRI-STEEM)

Worm-drive hose clamp

XT-150 Humidiﬁer

Worm-drive hose clamp

To open drain

Pitch 2"/ft (15%) min.

To open drain

Bolt hose clamp (supplied with blower)

Bolt hose clamp (supplied with humidiﬁer)

Condensate hose by DRI-STEEM

Plastic tie

Pitch 2"/ft (15%) min.

OM-7440

XT Steam Blower

Bolt hose clamp (supplied with blower)

Bolt hose clamp (supplied with humidiﬁer)

Condensate hose by DRI-STEEM

7" (178 mm) water seal (typ.)

To open drain

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

To open drain

Plastic tie

To open drain

OM-7441

Page 44

Dispersion: XT Steam Blowers (continued)

Steam outlet

Figure 42-1: XT Steam Blower drain line

Condensate hose

Plastic tie

1" (25 mm) air gap

OM-7425

Water seal 7" (178 mm)

Spill funnel (plumb to ﬂoor drain

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

Condensate drain connection to XT Steam Blower

1. Drain line must be routed as shown in the drawing to the left. Provide a 7" (178 mm) water seal to:

• Ensure drainage of condensate from the steam blower

• Keep steam from blowing out of the drain line

2. 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 degree 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.

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

4. The XT Steam Blower is constructed with a pitch toward the drain; however, the XT Steam Blower frame must be installed plumb and level for proper drainage.

WARNING!

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

• Cause bacteria and mold growth, which can cause illness.

• Affect unit performance and cause hot water at 212 °F (100 °C)

to discharge from the XT Steam Blower, which can cause severe personal injury.

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

Page 45

Dispersion: XT Steam Blowers (continued)

Wiring the XT Steam Blower

Power is provided to the XT Steam Blower from the humidifier blower terminals. Connect the L1 line from the steam blower to the L1 humidifier blower terminal; and connect L2 from the steam blower to the L2 humidifier blower terminal. Connect ground to the ground terminal. Be sure to tighten terminals securely.

Table 43-1: XT Steam Blower specifications

Steam

blower

model

XTSB-20 20 9.1 12 5.4 10 4.5 0.25 29 63 1.8 49

XTSB-50 50 22.7 25.5 11.6 23.2 10.5 0.74 85 500 14.2 53

Notes:

* Measurement taken 6.5 ft (2 m) in front of steam blower cabinet Steam blowers ship separately from XT humidiﬁers.

Maximum capacity Shipping weight Operating weight

lbs/hr kg/h lbs kg lbs kg A W cfm m3/min dBA*

Amps at

115V

(50/60 Hz)

Input

power

Volume airﬂow Noise

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

Page 46

Figure 44-1: XT Series principle of operation

Fill cup

Operation

Steam travels through vapor hose, tubing, or pipe to the dispersion assembly.

Steam outlet

Replaceable steam cylinder

Overﬂow prevents

humidiﬁer from over ﬁlling

Overﬂow

Fill

See the ﬁeld piping overview illustration on Pages 8-9 for ﬁll and drain connection details.

High water sensor. The humidiﬁer stops ﬁlling if water reaches this sensor.

Electrode. Electric current ﬂows between electrodes, heating water into steam.

Operating water level varies with changes in demand for humidity and changes in water conductivity.

Fill

Cutaway of steam cylinder

Overﬂow drain

Fill

Cylinder drain

OM-7376

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

Principle of operation

When the relative humidity level in the space being humidified drops below set point, the microprocessor controller in the XT Series humidifier receives a call for humidity and calculates a corresponding amperage value. The controller closes the contactor, which energizes the electrodes. If there is no water or not enough water in the steam cylinder, the fill valve opens and water enters the steam cylinder.

As soon as water rises to touch the electrodes, current flows through the conductive water from one electrode to another. The conductive water provides resistance to current flow, producing heat, and causing water in the steam cylinder to boil and produce

More on next page ▶

Page 47

Operation (continued)

steam. As the amount of water covering the electrodes increases, or as water conductivity increases, current flow increases. The fill valve remains open until the current flow increases to the amperage corresponding to the demand signal. When this amperage is met, the fill valve closes and water continues to boil off into steam. As the water level decreases, current flow decreases. When current flow becomes less than the amperage corresponding to the demand signal, the fill valve opens to increase the water level in the cylinder to increase current flow, increasing steam production. Steam created in the cylinder flows through the steam outlet via vapor hose or piping to the dispersion assembly, where it is discharged into the airstream.

The humidifier has integral drain water tempering. Water automatically cools to 140 °F (60 °C) or cooler when draining.

End-of-season drain

If there is no call for humidity for 72 hours, the humidifier is placed in End-of-Season (EOS) mode. When the unit enters EOS mode, the drain valve remains open for five minutes to allow the steam cylinder to drain, and then closes. When the humidifier receives a call for humidity after the end-of-season drain, the steam cylinder refills and the humidifier resumes normal operation. Draining the steam cylinder after 72 hours reduces the possibility of electrode corrosion and microbial growth in the cylinder.

Extended shutdown

To prepare the unit for an extended shutdown:

1. Drain the steam cylinder to reduce possibility of electrode corrosion. Open the drain valve by pressing the MODE button to illuminate the Service LED. Press the SELECT button repeatedly until dr.of appears on the display. Press the SET button to display dr.on and the drain valve opens. Check to make sure the steam cylinder is drained.

2. Turn the unit off by toggling the on-off switch.

3. Open the main external fused disconnect to stop power to the humidifier.

4. Close the water supply shut-off valve to the humidifier.

5. After shutdown, limit unit access to qualified service personnel only.

Safety functions

XT Series humidifiers are protected against running dry — current does not flow when the electrodes in the steam cylinder are no longer submerged in water. After 30 minutes of no current, an E3 message is displayed (see Page 56).

More on next page ▶

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

Page 48

Operation (continued)

Should the current rating exceed 125% of nominal current, the drain valve opens automatically. As the water level drops, the current rating drops back to the nominal value.

Control panel

Alphanumeric LED display

MODE button provides access to over 20 programmable functions in these categories:

• Display

• Service

• System Data

• Adjustments

• Program

Press the SELECT button to choose system functions

Should the current rating exceed 140% of the nominal current after several drainage operations, the humidifier will shut down automatically and display an E2 message (see Page 56).

To prevent duct saturation, installing a high limit humidistat and airflow proving switch is recommended.

Display panel operation

Press the MODE button on the display panel to access five operating modes: Display, Service, System Data, Adjustments, and Program. Press MODE until the LED of the chosen mode illuminates. Press SELECT to enter the mode submenu.

Press the SELECT button to view information and parameters of the chosen menu. In some cases, parameter labels and parameter values alternate on the display. For example, when the unit type for model number XT-30 is displayed, typ alternates with 30.

If a parameter is selected, press the SET button to enter or change the parameter value. Press MODE to leave the accessed mode and select the next mode.

Press the SET button to set system functions

On/Off toggle switch

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

Page 49

Operating modes

Display operating mode

Press the MODE button until the LED next to Display illuminates. Press the SELECT button to view the following:

• Steam production rate in lbs/hr

• Output limit as a percentage of maximum unit capacity

• Heating current in amps

Table 47-1: Display operating mode

Mode

Display

Program variable

lbs/hr Steam production rate in lbs/hr

Amps Heating current in Amps 0.0-max. 0.1 Indicator

Deﬁnition

Default display: Four dashed lines for external control; %RH for internal control.

Output limit as a percentage of maximum unit capacity. Varies with demand for internal humidity controller.

Default display

- - - - <%RH> 0-100 1 Indicator

100

Alternate

display

Range Increment Variable type

0.0 -

max. capacity

20.SP: 20-100

10.SP: 10-100

0.1 Indicator

1 Indicator

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

Page 50

Operating modes

Service operating mode

In the Service operating mode, components can be tested by manually switching them on or off using the SET button. To do this, press the MODE button until the LED next to Service illuminates. The LED next to the SELECT button is now flashing. This indicates that it is selectable. Press the SELECT button to view the Service submenu. Press the SELECT button repeatedly to scroll through the submenu. To modify parameter status, press the SET button if the LED is flashing. The table below shows the Service submenu parameters that may be switched on or off.

Table 48-1: Service operating mode

Mode

Service <Default> Default display: Four dashed lines - - - - Indicator

Note: * Unit will stop steam production for the FL, dr, Co, r1, and r2 program variables.

Program

variable

SE High water Sensor status: off (oF) or on

HU Humidistat status: off (oF) or on

FL*

dr*

Co*

r1*

r2*

Deﬁnition

Power. Use SET button to switch unit on/off

manually.

Fill valve. Use SET button to switch ﬁll valve on/off manually.

Drain valve. Use SET button to switch drain valve on/off manually.

Contactor. Use SET button to switch contactor on/off manually.

Remote indication relay 1. Use SET button to switch remote indication relay 1 (terminals 9, 10, 11) on/off manually.

Remote indication relay 2. Use SET button to switch remote indication relay 2 (terminals 26, 27, 28) on/off manually.

Default

display

SE.oF or

SE.on

HU.oF or

HU.on

P .oF or

P .on

FL.oF FL.on

dr.oF dr.on

Co.oF Co.on

r1.oF r1.on

r2.oF r2.on

Alternate

display

Range Increment Variable type

Indicator

Cycles component

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

Page 51

Operating modes (continued)

System Data operating mode

The System Data operating mode provides a quick way to review (but not change) current system parameters. To review System Data, press the MODE button until the LED next to System Data illuminates. The LED next to the SELECT button is now flashing, which indicates that it is selectable. Press the SELECT button to view the System Data submenu. Press the SELECT button repeatedly to scroll through the submenu. The table below and on the next page shows the parameters available for review.

Note: For most displayed information, the parameter label alternates with the parameter value. For example, when the unit type for model number XT-30 is displayed, typ alternates with 30.

Table 49-1: System Data operating mode

Mode

System Data

Program variable

<Default> Default display: Four dashed lines - - - - Indicator

vErS Firmware version Indicator

tYP

voLt Unit voltage Indicator

PHSE

HU.SP Humidity set point (%RH) for internal controller 35 10-100 1 Indicator

HU.Pr Internal controller humidity proportional range 10 05-15 1 Indicator

HU External or internal humidity controller HU. E HU. I Indicator

SPLt

1.dbL

2.dbL

20.SP

Deﬁnition

Model type 10, 20, 30, 50, 75, or 100 (corresponds to maximum unit capacity)

Unit phase Single phase Three phase

Output limit setting as a percentage of maximum unit capacity

Control signal: on oF on-off humidistat 0-20 0-20 volt 0-16 0-16 volt 0-10 0-10 volt 2-10 2-10 volt 1-5 1-5 volt

1.020 0-20 mA

1.420 4-20 mA Pot potentiometer, 0-135 ohm

Split combination for sequencing units:

See Page 48 for an explanation of settings.

Both cylinders are controlled parallel. Each cylinder is controlled separately.

Signal for turn-on point using internal humidity controller

20.SP signal for turn-on at 20% demand

10.SP signal for turn-on at 10% demand

Default display

1 3

100

on oF

00.99

20.SP 10.SP Indicator

Alternate

display

0-20 0-16 0-10 2-10

1-5

1.020

1.420 Pot

00.49

50.99

00.24

25.49

50.74

75.99

Range Increment Variable type

Indicator

20.SP: 20-100

10.SP: 10-100

1 Indicator

Indicator

More on next page ▶

Page 57

Humidifier start-up (continued)

phase of operation. The duration of this phase varies and lasts until the cylinder has achieved the nominal output. In the first stage of Service mode it can be checked whether the maximum fill level (SE.on) has been reached (see Page 48).

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.

☐ Your humidifier uses cold potable or softened water. Do not use

water treated by reverse osmosis (RO) or deionization (DI).

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

☐ Confirm that proper grounding and an approved earth ground

are provided.

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

☐ Turn power on and confirm that the display is illuminated.

☐ Confirm that the airflow switch is closed.

☐ Confirm that the high limit humidistat input is closed or that the

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

☐ If airflow switch or high limit humidistat is not included, jumper

H-H terminals unless on/off humidistat is installed.

☐ 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.

☐ If you experience difficulties, have the above information

available with the model and serial number of the humidifier and firmware version and call DRI-STEEM for assistance.

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

Page 58

System messages

E messages

The humidifier is factory programmed to display five system messages: E1, E2, E3, E4, and E5. These messages may also be programmed to provide remote indication using two relays, r1 and r2. The E messages indicate the following:

E1: Check the steam cylinder

An E1 message indicates the steam cylinder can no longer meet demand. Inspect the cylinder to determine if it needs to be cleaned or replaced. An E1 message is a service message only; the humidifier will continue to operate with a reduced output. Press the SET button to acknowledge the message.

An E1 message can also occur during start-up or after installing a new cylinder if the supply water has low conductivity.

E2: Over current

An E2 message indicates the humidifier has been switched off due to an over current condition (140% of the nominal current). Resolve the over current condition by clearing the drain if clogged, or by cleaning or replacing the cylinder if there is excessive mineral buildup, and then press the SET button to restart the humidifier.

E3: No water

An E3 message indicates there is no water in the steam cylinder. The humidifier shuts down automatically after 30 minutes if no current is sensed. Press the SET button to restart the humidifier. Check the water supply (supply valve, in-line water strainer, inlet valve) for water flow. Next, look for constant water flow out of the drain cup (may indicate drain valve stuck open). Try to clear the drain valve by going to the Service operating mode to cycle the drain valve on and off. If this doesn't help, resolve the condition by manually clearing the drain valve if it is stuck open (see Cleaning the drain valve in Maintenance procedures section on page 59).

E4: Uncoded processor board

An E4 message indicates a replacement processor board has been installed uncoded (slide switches in off position). Switch unit off. Code the processor board switches per the instruction sheet included with the replacement board to enable humidifier operation.

More on next page ▶

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

Page 59

System messages (continued)

E5: Service setpoint reached

An E5 message indicates service setpoint SErv has been reached. This is a service message only; the humidifier will continue to operate. Press the SET button to acknowledge the message. This message will occur when the counter of steam cylinder operating hours LIFE exceeds the service setpoint SErv.

For example, the user may decide to check the steam cylinder when LIFE reaches 500 hours. Go to Adjustments operating mode and press the SELECT button until the program variable SErv can be viewed. Press the SET button until 500 is displayed. This means an E5 message will occur when LIFE goes beyond 500 hours. This is a service message only; the humidifier will continue to operate. Press the SET button to acknowledge the message. Perform the desired maintenance. If a new cylinder is installed, be sure to reset the steam cylinder operating hours counter LIFE to 00 (see step 17 on page 57) and decide if service set-point SErv at 500 hours is sufficient. Adjust as necessary. If cylinder is not replace, user must add hours to SErv in order to avoid nuisance E5 messages.

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

Page 60

Maintenance procedures

WARNING!

When performing maintenance on the XT Series humidiﬁer:

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

• Turn the humidiﬁer off.

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

Failure to follow these instruction can result in property damage, severe personal injury, or death as a result of electric shock, burns, and/or ﬁre.

Note:

It is advisable to keep a spare steam cylinder in stock during humidification season. See the replacement parts section of this manual for part numbers.

Inspect unit every 500 hours of operation

At 500 hour intervals, inspect the steam cylinder, fill and drain valves, vapor hose, condensate piping, water supply piping, drain, drain piping, and all other parts for proper operation and/or cleaning requirements. Verify proper operation of high limit humidistat, relays, and airflow proving switch.

Clean and/or replace the steam cylinder

Steam cylinder service life depends on operating hours and water hardness. Replace the steam cylinder when the electrodes become insulated with mineral deposits to a degree that output demand can no longer be achieved (when the maximum water level sensor is repeatedly triggered).

To clean and/or replace the steam cylinder:

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

2. Drain water from the steam cylinder.

Open the drain valve by pressing the

MODE button to illuminate the Service LED. Press the SELECT button repeatedly until dr.of appears on the display. Press the SET button to display dr.on and the drain valve opens.

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

4. Open the steam cylinder door.

CAUTION! 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.

5. Disconnect the steam hose.

After the cylinder and humidifier components have cooled,

loosen the steam hose clamp and disconnect the steam hose from the cylinder.

6. Disconnect the electrode plugs and high water sensor wire.

7. Remove the cylinder.

8. Check the drain valve.

If the drain valve port is dirty, clean per the instructions on

Page 59.

9. Check O-ring.

Ensure that the O-ring of the drain valve body is correctly

placed. Change the O-ring if necessary. Dampen the Oring seals with water before replacing cylinder. Do not use

lubricant or other substance.

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

Page 61

Maintenance procedures (continued)

10. Clean the cylinder if mineral buildup is minimal.

To clean the cylinder,

strainer and flush. Do not use chemicals, acids, or soap to clean the cylinder because they can cause foaming.

11. Ensure strainer is in place.

12. Insert the cleaned or new cylinder.

Ensure that cylinder is secured properly by the mounting

brackets within the unit.

13. Connect electrode plugs to cylinder electrode pins.

The electrode plug wires are color-coded. See the unit wiring

diagram for a color-coded connection diagram. This colorcoding must be followed when connecting electrode plugs to cylinder electrode pins. On cylinders with six electrode pins, note that there are two electrode plug wires per color. Make sure that electrode plug wires of the same color are always directly opposite each other when connected to the cylinder electrode pins. Ensure that cylinder plugs fit snugly on the pins. If cylinder plugs become loose, obtain a new replacement plug from DRI-STEEM. See the replacement parts section of this manual.

flush with fresh water only. Remove the

14. Connect the high water sensor wire.

Connect the yellow wire to the single pin surrounded by a

plastic shoulder.

15. Connect the steam hose.

16. Start up the humidifier per the instructions on Page 54.

17. If a new cylinder was installed, reset the steam cylinder operating hours counter (LIFE) to 00.

To reset the

LIFE counter, go to the Adjustments menu using the MODE button and choose LIFE with the SELECT button. Enter the code number 37 with the SET button and wait until the counter is reset to 00. Reset the steam cylinder operating hours counter every time a new cylinder is installed. If the counter is not reset to 00, the steam cylinder operating hours will continue to accumulate.

Cleaning the drain valve

Always check the drain valve for need to clean before installing a new steam cylinder. Typically, the drain valve port is as dirty as the used steam cylinder.

1. Remove the steam cylinder as instructed on Page 58.

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

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

Page 62

Maintenance procedures (continued)

3. Disconnect the three slip-on terminals from the three tabs on the 24 VAC drain valve coil. Note locations for reassembly.

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

5. Remove the snap-fit black cap, nut, and washers from the coil assembly. Slide coil off the actuator.

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

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

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

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

10. Fit mounting screws with washers through the drain cup plate.

11. Push the ground wire terminal (green/yellow) onto the center tab. Push the two female terminals back onto the two opposing tabs on the coil.

Figure 60-1: Drain valve assembly

Drain valve body

Plunger

Spring

Actuator

Flat washer

Coil

Spring washer

Cap

Nut

OM-7386

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

Page 63

Troubleshooting

1. Review possible causes and recommended actions.

If you have a problem with your XT Series Humidifier, review the troubleshooting guide on the following pages for possible causes and recommended actions for typical problems. If you have a problem with an Ultra-sorb humidifier, refer to the Ultra-sorb manual.

2. If you’re still having problems, call us.

If the troubleshooting guide does not help you solve your problem, call us with the following information available:

• Product name, firmware version, and serial number You’ll find this information on the wiring diagram, on the

outside of the control cabinet door, and/or in the System Data operating mode.

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

• Time 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.

Calling DRI-STEEM technical support: 800-328-4447

Have the following information ready before calling technical support.

Humidifier model number _________________________________

Humidifier serial number _________________________________

Firmware version ________________________________________

Problem definition _______________________________________

Time problem began _____________________________________

DRI-STEEM XT Series Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 61

Page 64

Troubleshooting (continued)

Table 62-1: Problem/possible cause/action

Problem Possible cause Action

No readable information on display

Humidiﬁer does not energize; steam cylinder does not heat up

Reduced or no output (even though water level is correct)

Steam cylinder failure Improper wiring • Verify proper voltage applied to steam cylinder.

No power or incorrect voltage to processor board

Modular communication cable is disconnected.

Non-existent supply voltage to humidiﬁer

Non-existent control voltage • Check for proper supply voltage per wiring diagram.

H-H terminals are open. • Check if auxiliary limit controls are not allowing system to operate, e.g., high limit humidistat, airﬂow

Transmitter or humidistat faults:

• Open, shorted, or incorrect wiring of transmitter or humidistat

• Signal is incorrect, out of range, or miswired.

• Ground loop

• Control signal exceeded the range limits. Correct signals are 4 to 20 mA, 0 to 135 ohms, or 0 to 10 VDC.

Malfunctioning control system

Steam cylinder malfunctioning

Mineral buildup on steam cylinder electrodes

Steam cylinder electrode corrosion

• Check main power supply.

• Reset control transformer circuit breaker if tripped.

• Connect modular cable.

• Check main line fuse.

• Check main line safety switch.

• Verify terminal block electrical connections.

• Verify contactor electrical connections.

• Verify proper wiring of multi-tap transformer.

• Verify terminal block electrical connections.

• Check for control circuit voltage, 24 VAC. If voltage is not present, check transformer circuit breaker.

• Reset if needed by pressing On/Off switch on display panel.

• Check door interlock switch continuity.

proving switch, etc. Reset, replace, or calibrate as needed. Jumper H-H if auxiliary limit controls are not used.

• Check DC supply voltage terminals of RH transmitter, VAV humidity transmitter, or humidistat: – Terminal 13: 21 VDC; Terminal 23: GND

• If there is no output 4 to 20 mA, replace transmitter. Transmitter by others may not be compatible. Consult DRI-STEEM.

• Isolation control board by others may not be compatible. Consult DRI-STEEM.

• Recalibrate if there is a calibration error: Normal range 4 to 20 mA = 0 to 100% RH; 12 mA = 50% RH

• Measure for normal 0 to 10 VDC or 4 to 20 mA control signal.

• Check if auxiliary limit controls are not allowing system to operate, e.g., high limit humidistat, airﬂow proving switch, etc. Reset, replace, or calibrate as needed. Jumper H-H if auxiliary limit controls are not used.

• Check fuse in power circuit. If open, replace fuse with equal fuse.

• Verify that proper voltage is being applied to the steam cylinder.

• Check current through electrode wires.

• If power components are not functioning, replace.

• Verify proper electrical connections.

• Inspect steam cylinder for severe mineral buildup on or around electrodes. If present, increase cleaning frequency or replace steam cylinder.

• Inspect electrodes for surface corrosion or pitting. This is usually caused by a high chloride level in the supply water. Test water and consult DRI-STEEM for advice.

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Page 66 • DRI-STEEM XT Series Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 69

Replacement parts (cont.)

Table 67-1: XT Series replacement parts

No. Description Part no.

Wiring kit (XT-10 208/240/480/600V/3-Ph, XT-20 208/240/480/600V/3-Ph) 530010-041

Wiring kit (XT-10 208/240/277/480/600V/1-Ph, XT-20 277/480/600V/1-Ph) 530010-042

Wiring kit (XT-20 208/240V/1-Ph) 530010-045

Wiring kit (XT-30 480/600V/3-Ph) 530010-043

Wiring kit (XT-30, 208/240V/3-Ph, XT-50 208/240/480/600V/3-Ph) 530010-044

Wiring kit (XT-75/100/150/200) 530010-046

Steam cylinders

Steam cylinder (XT-10 208/240/277V/1-ph) 530011-001

Steam cylinder (XT-10 480V/1-ph) 530011-008

Steam cylinder (XT-10 600V/1-ph) 530011-009

Steam cylinder (XT-10 208-240V/3-ph) 530011-002

Steam cylinder (XT-10 480V/3-ph) 530011-010

Steam cylinder (XT-10 600V/3-ph) 530011-011

Steam cylinder (XT-20 208-240V/1-ph) 530011-012

Steam cylinder (XT-20 277V/1-ph) 530011-013

Steam cylinder (XT-20 480V/1-ph) 530011-014

Steam cylinder (XT-20 600V/1-ph) 530011-015

Steam cylinder (XT-20 208-240V/3-ph) 530011-003

Steam cylinder (XT-20 480V/3-ph) 530011-004

Steam cylinder (XT-20 600V/3-ph) 530011-016

Steam cylinder (XT-30 208-240V/3-ph) 530011-006

Steam cylinder (XT-30 480V/3-ph) 530011-005

Steam cylinder (XT-30 600V/3-ph) 530011-017

Steam cylinder (XT-50 208-240V/3-ph) 530011-018

Steam cylinder (XT-50 480V/3-ph) 530011-007

Steam cylinder (XT-50 600V/3-ph) 530011-019

Steam cylinder (XT-75/150* 480V/3-ph) 530011-020

Steam cylinder (XT-75/150* 600V/3-ph) 530011-021

Steam cylinder (XT-100/200* 480V/3-ph) 530011-022

Steam cylinder (XT-100/200* 600V/3-ph) 530011-023

* XT-150 and XT-200 Models require (2) steam cylinders per unit

21 Strainer, steam cylinder 530001-047

Drain

22 Drain valve assembly, 24 V 530001-041

23 Drain valve, with operator 24 V 530001-042

24 Drain valve body 530001-043

25 O-ring, drain valve body 530001-044

26 Drain cup with screws 530001-045

27 Drain cup plate 530001-046

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DRI-STEEM XT Series Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 67

Page 70

Replacement parts (cont.)

Table 68-1: XT Series replacement parts

No. Description Part no.

Inlet

28 Fill adaptor assy, 3/8" 180994-038

29 Fill adaptor, 3/8" O.D. tubing 530001-002

30 Washer, 5/8" hose 530001-003

31 Compression nut, 3/8" 530001-006

32 Compression sleeve, 3/8" 530001-008

33 Strainer, inlet valve 530001-004

Valve, inlet yellow (XT-10) 530001-011

Valve, inlet green (XT-20 except XT-20 208/240V/1-Ph) 530001-012

Valve, inlet red (XT-20 208/240V/1-Ph, XT-30/50) 530001-013

Valve, inlet white (XT-75/100/150/200) 530001-014

Fill cup with cap (XT-10/20 except XT-20 208/240V/1-Ph) 530001-021

Fill cup with cap (XT-20 208/240V/1-Ph, XT-30/50) 530001-022

Fill cup with cap (XT-75/100/150/200) 530001-025

Fill kit, high pressure (XT-10/20 except XT-20 208/240V/1-Ph) 530001-031

Fill kit, high pressure (XT-20 208/240V/1-Ph, XT-30/50) 530001-032

Fill kit, high pressure (XT-75/100/150/200) 530001-033

Exterior

37 Door fastener 530001-054

Door assy, cylinder (XT-10/20 except XT-20 208/240V/1-Ph) 530012-001

Door assy, cylinder (XT-20 208/240V/1-Ph, XT-30/50) 530012-002

Door assy, cylinder (XT-75/100/150/200) 530012-006

Door assy, electrical (XT-10/20/30/50/75/100) 530012-005

Door assy, electrical (XT-150/200) 530012-007

Page 68 • DRI-STEEM XT Series Electrode Steam Humidifier Installation, Operation, and Maintenance Manual

Page 71

Replacement parts (cont.)

Figure 69-1: XT Steam Blower replacement parts

OM-7448

Table 69-1: XT Steam Blower replacement parts

No. Description Part no.

1 Capacitor (XTSB-50 only) 406772-001

2 Fuse holder, 2-pole 406750-006

Fuse, time delay, 6/10 Amp 406740-012

Fuse, time delay, 1¼ Amp 406740-013

4 Lug, wire 409250-003

Transformer (XTSB-20, 208/240/277 to 120VAC) 408963-001

Transformer (XTSB-20, 480 to 120VAC) 408963-002

Transformer (XTSB-20, 600 to 120VAC) 408963-003

Transformer (XTSB-50, 208/240/277 to 120VAC) 408963-011

Transformer (XTSB-50, 480 to 120VAC) 408963-012

Transformer (XTSB-50, 600 to 120VAC) 408963-013

DRI-STEEM XT Series Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 69

Page 72

Expect quality from the industry leader

For more than 40 years, DRI-STEEM has been leading the industry with creative and reliable humidification solutions. Our focus on quality is evident in the construction of this humidifier, which features a two year limited 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 corporation

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

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

Continuous product improvement is a policy of 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.

Two-year limited warranty

DRI-STEEM Corporation (“DRI-STEEM”) warrants to the original user that its products (with the exception of the electrode cylinder) 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.

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.

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.

Form No. XT-IOM-0108 Part No. 890000-140 Rev A

Page 70 • DRI-STEEM XT Series Electrode Steam Humidifier Installation, Operation, and Maintenance Manual