DriSteem XTR Series Installation, Operation And Maintenance Manual

READ AND SAVE THESE INSTRUCTIONS

XTR MODULATING SERIES

Electrode Steam Humidifier

Installation, Operation,
and Maintenance Manual

Warnings and cautions

WARNINGS AND CAUTIONS

WARNING

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

DriSteem
Europe: [phone]

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_032612_1153

®

Technical Support: North America: 800-328-4447

CAUTION

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

Hot surfaces and hot water

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

mc_032612_1154

Disconnect electrical power

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

Contact with energized circuits can cause property damage, severe personal injury, or death as a result of electrical shock
or fi re. Do not remove cabinet covers until electrical power is disconnected.

Follow the shutdown procedure on Page 38 before performing service or maintenance procedures on any part of the
system.

mc_032612_1155

XTR INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

ii

Warnings and cautions

WARNING

Electrical shock hazard

If the humidifi er starts up responding to a call for humidity during maintenance, severe personal injury or death from
electrical shock could occur. To prevent such start-up, follow the shutdown procedure on Page 38.

mc_032612_1156

CAUTION

Follow steam piping recommendations

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

Hot discharge water

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

Excessive supply water pressure

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

mc_123010_1520-XT

XTR INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

iii

XTR INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

iv

Table of contents

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

OVERVIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

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

SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Dimensional drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Voltages, weights, and dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Dispersion options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

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

Humidifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Control and dispersion devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Removing covers and steam cylinder . . . . . . . . . . . . . . . . . . . . . . . . 8

Wall mounting humidifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Installing steam cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Piping: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Supply water and drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Field piping overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

XTR steam blower and XTR fan pack . . . . . . . . . . . . . . . . . . . . . . . 11

Field wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Sensor placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

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

Selecting the location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

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

XTR dispersion tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

XTR steam blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

XTR fan pack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Download DriSteem literature

ii

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

DriSteem Technical Support

800-328-4447

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Principle of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Steam cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Drain valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Replacement parts: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Dispersion devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

XTR humidifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

XTR INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

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OVERVIEW

Product overview

HUMIDIFIER

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

FIGURE 2-1: XTR HUMIDIFIER COMPONENTS

Fill cup

Steam outlet

OM-7717

Painted cabinet and
removable covers

Control panel

Fill valve

Supply water

Fill
line

Overfl ow

High water sensor

Electrodes

Steam cylinder

Drain valve

Drain cup

90-1522a

Drain

XTR INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

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Product overview

OVERVIEW

SUPPLY WATER

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

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

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

Softened water: The benefi t of softened water is longer cylinder life

(depending on water chemistry) than with hard water, because softened
water does not coat the electrodes as much as hard water. However,
softened water ions stay in solution to much higher concentrations than hard
water ions. This requires more frequent draining and fi lling, which results in
less energy and water effi ciency and less consistent steam output.

CONTROL PANEL

The XTR humidifi er controller provides push-button operation and indicator
lights for operating status and troubleshooting information. See “Operation”
beginning on Page 32 for details.

Important:

• Recommended supply water conductivity
for DriSteem electrode humidifiers is 125
to 1250 μS/cm (roughly comparable to
water hardness of 3 to 36 grains per
gallon).

• Demineralized, deionized, and reverse­osmosis water cannot be used. These
water types are not conductive enough
for electrode humidifiers.

FIGURE 3-1:
XTR HUMIDIFIER CONTROL PANEL

On-off button

Fill

Steam

Drain

Service

Indicator lights

XTR INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

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SPECIFICATIONS

Dimensional drawing

FIGURE 4-1: XTR HUMIDIFIER DIMENSIONS

Top

8-7/8"

(225 mm)

3-3/8"
(86 mm)

3-3/8"
(86 mm)

Steam outlet

7-7/8"

(200 mm)

Fill cup

1-5/8" (41 mm)

4-1/4" (108 mm)

Electrical knockouts

5-3/4"(146 mm)

Drain

3-3/8"

(86 mm)

Front Side Back

10-1/8"

(257 mm)

20-7/8" (530 mm)

7-1/8"
(181 mm)

17-1/2"

(445 mm)

Bottom

2" (51 mm)

Mounting holes
(see mounting
dimensions in
Figure 8-1)

3-3/8"
(86 mm)

90-1701X
mc_050712_1400

XTR INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

4

7-7/8"

(200 mm)

Supply water
connection

Voltages, weights, and dimensions

Table 5-1:
XTR humidifier capacities and electrical specifications

SPECIFICATIONS

Mode Voltage Input power

120V, 60 Hz 1.92 kW 5.6 2.5

208V, 60 Hz 3.33 kW 9.9 4.5

16 A

230V, 50 Hz 3.68 kW 10.8 4.9

240V, 60 Hz 3.84 kW 11.3 5.1

The XTR humidifi er can be confi gured to operate in a current limited mode if lower maximum operating capacity is desired.
See page 15 for setting this option.

120V, 60 Hz 1.38 kW 4.0 1.8

11.5 A

mc_050712_1408

208V, 60 Hz 2.39 kW 7.1 3.2

230V, 50 Hz 2.65 kW 7.8 3.5

240V, 60 Hz 2.76 kW 8.1 3.6

Nominal steam capacity

Nominal current draw Maximum line current Fuse

lbs/hr kg/h

16 A 19.2 A 25 A

11.5 A 13.8 A 25 A

Table 5-2:
XTR humidifier weights and dimensions

Shipping weight Maximum operating weight

Width Height Depth

lbs kg lbs kg inches mm inches mm inches mm

27.0 12.2 23.0 10.4 10-1/8 257 20-7/8 530 7-1/8 181

mc_050712_1409

Dimensions

XTR INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

5

INSTALLATION

Dispersion options

The dispersion options in Figure 6-1 are available for XTR humidifi ers. For
installation details, see “Dispersion” beginning on Page 7.

FIGURE 6-1: XTR HUMIDIFIER DISPERSION OPTIONS

XTR dispersion tube in a duct

OM-7718

XTR steam blower mounted on top of humidifi er

OM-7720

XTR fan pack Remote-mounted XTR steam blower

90-1796

XTR INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

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OM-7719

Selecting a location

INSTALLATION

HUMIDIFIER

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

• Proximity to duct

Install the humidifi er near the duct. The maximum recommended length for

steam hose connecting an XTR humidifi er to a dispersion tube is 6' (1.8 m).

See “Dispersion” beginning on Page 20.

• Elevation of installed dispersion assembly

The recommended installation location for the dispersion device is at an

elevation higher than the humidifi er. However, if the dispersion device must
be installed at an elevation lower than the humidifi er, install a drip tee and
drain, as shown in Figure 19-3.

• Temperature and relative humidity (RH):

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

RH requirements:

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

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

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

• Recommended clearances (see Figure 7-1)

Control and dispersion devices

See “Sensor placement” on Page 18.
See “Dispersion” beginning on Page 20.

• Electrical connections

See “Field wiring” beginning on Page 12.

• Supply water and drain piping connections

See “Piping” on Page 9.

• Exterior wall insulation

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

insulated.

FIGURE 7-1: XTR HUMIDIFIER RECOMMENDED MINIMUM CLEARANCES

Side

4" (102 mm)

Front

16" (406
mm) for
electrical
clearance

16" (406 mm)
for steam hose

30" (762 mm)
for service
access

16" (406 mm) for drain

90-1702X

mc_050712_1405

XTR INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

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INSTALLATION

Mounting

REMOVING COVERS AND STEAM CYLINDER

1. Unpack humidifier from shipping carton, and remove front cover by
removing screw and lifting cover up and away from humidifier.

2. If any wires are connected to top cylinder, pull straight up on plugs to
disconnect them from pins.

3. Remove cylinder and any packaging from inside of humidifier cabinet.

4. Remove two screws on right side of humidifier and remove side cover to
expose electrical compartment.

WALL MOUNTING HUMIDIFIER

The XTR humidifi er weighs 23 lbs (10.5 kg) with a full cylinder. Make sure the
mounting system will support its weight. Secure humidifi er to sturdy wall or to
sheet metal duct. If mounting to stud frame wall:

1. Install two spanner boards spanning two studs. Position top spanner board
so it will align with top of cabinet, and center bottom spanner board on
bottom mounting holes. See mounting holes in Figure 8-1.

WARNING

Mounting hazard

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

mc_060110_1540

FIGURE 8-1: XTR HUMIDIFIER
MOUNTING HOLES

1-1/2" (38 mm)

4" (102 mm)

1" (25 mm)

2. Predrill holes in spanner boards, and secure humidifier to spanner boards
with screws provided.

Note: Use appropriate mounting methods and mounting hardware for other

mounting surfaces.

INSTALLING STEAM CYLINDER

1. Verify that O-ring is in place in slot of drain body. See Figure 8-2.

2. Use water to lubricate drain outlet on bottom of cylinder and O-ring in
drain valve body. Do not use oil, grease or any lubricant.

3. Insert cylinder drain outlet into drain valve body, and rotate cylinder so
Warning label is visible.

4. Attach the two electrode wires (they are interchangeable) and high water
sensor wire to pins on top of cylinder. Make sure plugs fit snugly and are
fully engaged on pins.

FIGURE 8-2: XTR STEAM CYLINDER INSTALLATION

Front view of cabinet

without cylinder

Front view of cabinet

with cylinder installed

Mounting
keyholes

Mounting
holes

90-1701-dims
mc_050712_1404

12" (305 mm)

4" (102 mm)

Cylinder guide

Drain valve body

XTR INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

8

Cylinder

Warning label

OM-7721

INSTALLATION

Piping:

SUPPLY WATER QUALITY

Supply water and drain

XTR humidifi ers use tap water to generate humidifi cation steam. Recommended
supply water conductivity for DriSteem electrode humidifi ers is 125 to 1250
μS/cm (roughly comparable to water hardness of 3 to 36 grains per gallon).
Do not use demineralized water. Do not use heated supply water, because
unheated supply water is required for drain water tempering.

SUPPLY WATER PIPING

Use only copper for supply water piping—do not use rubber or plastic. The fi ll
valve connection size is a 1/4" (DN8) compression fi tting.

HUMIDIFIER DRAIN PIPING

Drain piping must be code-approved copper or steel rated for 212 °F (100 °C)
minimum. The fi nal connection size is 3/4" (DN20) copper for the steam
cylinder drain. Do not reduce this connection size. See Figure 9-1.

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

ACTIVATING AUTOMATIC DRAIN WATER TEMPERING

The XTR humidifi er is shipped with drain water tempering set to OFF. To
activate automatic drain water tempering, locate the DIP switch #4 on the
control board, and place it in the ON position as shown in Figure 15-1.

Note: Control board location is shown in Figure 42-1.

Important:

Thoroughly fl ush the supply water piping
to remove pipe residue and stagnant water
before connecting piping to the humidifi er.
Pipe residue and stagnant water in the water
supply piping can cause foaming, preventing
the humidifi er 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 9-1: DRAIN PIPING DETAIL

Drain cup

Hose clamp
(fi eld supplied)

Hose clamp
(fi eld supplied)

Black rubber hose

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

OM-7499X

3/4" (DN20) copper

Note: Dashed lines indicate provided by

installer.

mc_050812_1111

Open
drain

1"
(25 mm)
air gap

CAUTION

To prevent drain steam from
condensing on the cabinet, do not
install the drain under the humidifi er.

XTR INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

9

INSTALLATION

Piping:

FIGURE 10-1: XTR HUMIDIFIER FIELD PIPING OVERVIEW

3/4" (DN20) metallic drain
piping. If piping run is over
10' (3 m) increase pipe to
1¼" (DN32).

1" (25 mm) air gap required

Open drain required. Locate air gap only in
spaces with adequate temperature and air
movement to absorb fl ash steam, or condensing
could occur on nearby surfaces. Refer to
governing codes for drain pipe size and
maximum discharge water temperature.

Field piping overview

Spill funnel; plumb to fl oor drain

Pitch 1/8”/ft (1%) toward drain

Install plumb

Hose and
clamps

Steam hose; may also use tubing. See Table 20-1 for
maximum lengths. Tubing must be grounded.

Fill valve (with screen)

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

1/4" (DN8) O.D. copper line

Inlet strainer, by installer

Note: Dashed lines indicate provided by installer.

mc_050812_1110

Supply valve, by installer

OM-7722

XTR INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

10

INSTALLATION

Piping:

FIGURE 11-1: PIPING CONNECTIONS TO XTR STEAM BLOWER

XTR steam blower and XTR fan pack

XTR steam blower mounted remotely XTR steam blower mounted directly on top of XTR humidifi er

Hose clamp (supplied with

Hose clamp (supplied with
humidifi er)

Steam hose, 6' (1.8 m) long
(supplied with humidifi er)

Hose clamp (supplied with
humidifi er)

OM-7723

mc_050912_1130

steam blower)

Steam hose (supplied with
steam blower)

Hose clamp (supplied with
humidifi er)

OM-7724

FIGURE 11-2: PIPING CONNECTIONS TO XTR FAN PACK

Fan pack

Steam hose
(provided with humidifi er)

XTR humidifi er

Condensate drain
hose, 3/8" ID
(provided with fan
pack)

To drain

Note: Dashed lines indicate provided by installer.

mc_050912_1131

Grille
(front of fan pack)

Wall

90-1551

XTR humidifi er drain

Back view of fan packSide view of wall

90-1560

Condensate drain
hose connection

Steam hose connection

XTR INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

11

INSTALLATION

Field wiring

All wiring must be code approved and in accordance with the unit wiring
diagram. Power supply wiring must be rated for 220 °F (105 °C). See Figure
12-1 for the humidifi er wiring diagram location.

When selecting a location for installing the humidifi er:

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

• Do not loop power wiring.

• Do not use aluminum wire.

CONDUIT KNOCKOUTS

Conduit knockouts are provided on top and bottom of the cabinet. Control
wiring knockouts are toward the top front; power wiring knockouts are on the
top rear.

WARNING

Electric shock hazard

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

FIGURE 12-1:
FIELD WIRING REQUIREMENTS

CAUTION

Adding conduit connections not recommended

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

FIELD WIRING CONNECTION INSTRUCTIONS

• Connect to line power.

XTR humidifi er is shipped confi gured for 230V or 240V. To confi gure for

120V or 208V, refer to wiring diagram on humidifi er subpanel and inside
of humidifi er side cover.

See Table 5-1 and the data plate on outside of cabinet for nominal current

draw, maximum line current, and recommended fusing.

• Connect to control signal wiring from a humidistat. See note below.

• Connect to duct airfl ow proving switch and duct high limit humidistat wiring
(recommended optional devices). See note below.

Note: See recommended control wiring in Figure 14-1.

Wiring diagram
inside of front cover

Power supply

Fused disconnect

OM-7692X

XTR humidifi er

Notes:

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

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

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

• For circuit protection requirements, see
recommended fusing in Table 5-1.

XTR INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

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