DriSteem GTS SERIES Installation, Operation And Maintenance Manual

READ AND SAVE THESE INSTRUCTIONS

GTS

Gas-to-Steam Humidifier

Installation, Operation, and Maintenance Manual

WARNING

Fire or explosion hazard

If the information in this manual is not followed exactly, a ﬁ re or explosion could result, causing property damage, personal injury, or death.

If you smell gas:

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any phone in your building.

• Immediately call your gas supplier from an off-site phone. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the ﬁ re department.

Installation and service must be performed by a qualiﬁ ed installer, service agency, or the gas supplier.

For toll-free support call DriSteem Technical Support: 1-800-328-4447

WARNINGS AND CAUTIONS

Warnings and cautions

EUROPEAN MODELS

SAFE OPERATING INSTRUCTIONS

1. Read “Fire and explosion hazard” on the next page.

2. Set the humidistat to the lowest setting.

3. Turn off all electric power to the appliance.

4. This appliance is equipped with an ignition device that automatically lights

the burner. Do not try to light the burner by hand.

5. Remove the control access panel.

6. Unplug the black power plug on the gas valve (see detail of gas valve below).

7. Wait five minutes to clear out any gas.

If you still smell gas, STOP! Follow “B” on the next page.

If you do not smell gas, go to the next step.

8. Plug the black power plug back into the gas valve.

9. Replace the control access panel.

10. Turn on electric power to the appliance.

11. Set the humidistat to desired setting.

12. If the appliance does not operate, follow the instructions below under,

“To turn off gas to appliance,” and call your service technician or gas supplier.

Important: Troubleshooting information

for this humidiﬁ er is located in the Vapor-logic Installation and Operation Manual shipped

with your humidiﬁ er. If you do not have this manual, go to www.dristeem.com to download or order a copy.

European models

The DriSteem GTS Gas-to-Steam Humidiﬁ er has been certiﬁ ed for compliance with harmonised European directives concerning gas appliances, low voltage, and emission (Gas Appliance Directive 90/396/CEE). Testing was carried out by the Canadian Standards Association; the notifying body is AFNOR in France, which is a recognized authority by the European bodies and the DTI in the United Kingdom.

Installation must conform to the requirements of the National Gas Safety (Installation & Use) Regulations.

SAFE OPERATING INSTRUCTIONS

DETAIL OF GAS VALVE

Top view

Gas valve

Gas valve power plug

To turn off gas to appliance:

1. Set the humidistat to lowest setting.

2. Turn off all electric power to the appliance if service is to be performed.

3. Remove control access panel.

4. Unplug the black power plug on the gas valve.

5. Replace control access panel.

GTS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

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

Fire or explosion hazard

A. This appliance does not have a pilot. It is equipped with an ignition device which automatically lights the burner.

Do NOT try to light the burner by hand.

B. Before operating, smell all around the appliance area for gas. Be sure to smell next to the ﬂ oor because gas can be

heavier than air and settle on the ﬂ oor.

If you smell gas:

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any phone in your building.

• Immediately call your gas supplier from an off-site phone. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the ﬁ re department.

C. Do not use this appliance if any part has been under water. Immediately call a qualiﬁ ed gas appliance service

technician to inspect the appliance and to replace any part of the control system and any gas control that has been under water.

CAUTION

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

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 North America: 800-328-4447 Europe: +3211823595

Read all warnings and instructions

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

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

Technical Support:

Continued

GTS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

iii

Warnings and cautions

WARNING

Carbon monoxide, ﬁ re, explosion, and electrical shock hazards

Improper installation, adjustment, alteration, service, maintenance, or use can cause carbon monoxide poisoning, ﬁ re, explosion, electrical shock, and other hazardous conditions. These hazardous conditions could cause personal injury, property damage, or death. To prevent hazardous conditions, read all warnings; lock all power disconnect switches in the OFF position before removing any access panels; and consult a qualiﬁ ed installer, service agency, local gas supplier, or your distributor or branch for information or assistance. The qualiﬁ ed installer or agency must use only factory authorized and listed kits or accessories when modifying this product.

• Inspect humidiﬁ er and accessories upon arrival for damaged, missing, or improper parts. If there is a problem, call DriSteem.

• Application of this humidiﬁ er should have special attention given to vent sizing and material, gas input rate, and unit sizing. Improper installation or misapplication of the humidiﬁ er can cause excessive servicing or permanent component failure.

• When working on equipment, observe precautions in literature, tags, and labels attached to or shipped with the unit and observe other safety precautions that may apply. Wear safety glasses and work gloves. Have a ﬁ re extinguisher available during start-up, adjustment procedures, and service calls.

• Do not lift humidiﬁ er by gas controls, gas manifold, ﬁ re box, or shroud.

• Should overheating occur, or the gas supply fail to shut off, shut off the manual gas valve to the appliance before shutting off the electrical supply.

• The evaporating chamber is designed as a nonpressurized vessel. DO NOT restrict piping where steam exits the humidiﬁ er. Install drain piping and piping that connects the evaporating chamber to the dispersion assembly only as described in this manual. DO NOT install a shut-off valve on the piping connecting the evaporating chamber to the steam outlet.

• Check the humidiﬁ er name plate for the gas type indicated (natural gas or propane gas). Supply the humidiﬁ er only with the gas type indicated, or burner failure will result. To convert the humidiﬁ er to a different gas type, contact DriSteem Technical Support or your local DriSteem Representative/Distributor.

• Installation must conform to the requirements of the authority having jurisdiction or, in the absence of such requirements, must conform to:

– In the United States: The National Fuel Gas Code, ANSI Z223.1 (latest edition).

– In Canada: Local plumbing or waste water codes and other applicable codes and with the current code CAN/

CGA-B149.1, “Installation Code for Natural Gas Burning Appliances and Equipment,” or CAN/CGA-B149.2, “Installation Code for Propane Burning Appliances and Equipment.”

– In Europe: The National Gas Safety (Installation & Use) Regulations.

• Do not install in potentially explosive or ﬂ ammable atmospheres laden with grain dust, sawdust, or similar airborne materials.

• Installation of humidiﬁ er in high humidity or salt water atmospheres causes accelerated corrosion, reducing the normal life-span of the unit.

• To prevent premature heat exchanger failure, do not locate any gas-ﬁ red unit in areas where chlorinated, halogenated, or acid vapors are present in the atmosphere.

• Locate the humidiﬁ er in an area clear of combustible materials, gasoline, and other ﬂ ammable vapors and liquids.

Continued

GTS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Warnings and cautions

WARNING

Carbon monoxide, ﬁ re, explosion, and electrical shock hazards (continued)

• With the exception of sealed combustion units, do not locate units in tightly sealed rooms or small compartments without provision for adequate combustion air and venting. Room air combustion must be supplied through a minimum of two permanent openings in the wall, with at least one near the bottom. See "Combustion and ventilation air" for additional information.

• Remove all shipping brackets and materials before operating the humidiﬁ er.

• Do not locate humidiﬁ er in a negative pressure space. Combustion products could be suctioned from the venting.

• Humidiﬁ er ﬂ ue gases must be vented to the outside atmosphere.

• Power supply disconnect switch must be in the off position while making wiring connections to prevent electrical shock and equipment damage. All units must be wired in strict accordance with the wiring diagrams furnished with this unit.

• Turn off all gas while installing the gas piping and manual shutoff valve for the humidiﬁ er.

• The appliance and its individual shut-off valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures exceeding 0.5 psig (3.5 kPa).

Hot surfaces and hot water

This steam humidiﬁ cation system has extremely hot surfaces. Water in tank, 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.

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.

Follow the shutdown procedure on Page 54 before performing service or maintenance procedures on any part of the system.

CAUTION

Hot discharge water

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

The DriSteem Drane-kooler supply to the Drane-kooler remains open during draining.

Excessive supply water pressure

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

™

water tempering device needs fresh make-up water in order to function properly. Make sure the water

GTS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Table of contents

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

EUROPEAN MODELS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii

SAFE OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii

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

Tap/softened water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

RO/DI water option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

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

Models, capacities, electrical specifications, and weights . . . . . . . . . . . . 4

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

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

Location and clearance recommendations . . . . . . . . . . . . . . . . . . . . . . . 6

Outdoor Enclosure: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Piping: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Tap/softened water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

RO/DI water option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Supply water and drain overflow connections . . . . . . . . . . . . . . . . . 18

Supply water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Combustion and ventilation air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Room air combustion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Sealed combustion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Vertical and horizontal venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Guidelines (stack connection) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Special horizontal venting requirements . . . . . . . . . . . . . . . . . . . . . 30

Dispersion: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Selecting a location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Interconnecting piping requirements . . . . . . . . . . . . . . . . . . . . . . . . 32

Steam outlet connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Drip tee installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Single tube and multiple tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Rapid-sorb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Area-type fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Ultra-sorb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

GTS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Table of contents

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Start-up checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Start-up procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Start-up commissioning checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Inspection recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Burners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Burner assemblies and heat exchanger tubes . . . . . . . . . . . . . . . . . 56

Maintenance frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Burner maintenance instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Tap/softened water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Water quality recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Adjusting skim duration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Cool down procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Inspection and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

RO/DI water option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

RO/DI water quality recommendations . . . . . . . . . . . . . . . . . . . . . 61

Cool down procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

REPLACEMENT PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

GTS humidifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Fill, drain, and blocked flue sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Electrical parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Outdoor Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

EUROPEAN MODELS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Authorized countries of destination . . . . . . . . . . . . . . . . . . . . . . . . 72

Appliance category . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

ATTENTION INSTALLER

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

DriSteem Technical Support 800-328-4447

Where to find more information

On our Web site:

The following related documents can be viewed, printed or ordered from our web site, www.dristeem.com

• Catalogs: – GTS – Ultra-sorb

• Installation, Operation, and Maintenance

– Ultra-sorb – Vapor-logic® (includes sensor placement

• DriSteem Design Guide (includes steam

In DriCalc:

DriCalc® is our humidiﬁ cation system sizing and selection software, which can be ordered from our website.

DriCalc includes a comprehensive library of installation guide documents, including:

• Rapid-sorb installation instructions for vertical

• Recommended dispersion placement within a

• Recommended sensor placement

manuals:

recommendations and troubleshooting information)

loss tables and general humidiﬁ cation information)

airﬂ ows

duct or air handler

Or call us at 800-328-4447

While obtaining documents from our web site or from DriCalc is the quickest way to review our literature, we will also mail to you any literature you need.

GTS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

PRODUCT OVERVIEW

Product overview

GTS humidiﬁ ers burn either natural or propane gas to heat ﬁ ll water into steam for humidiﬁ cation. The unit has from one to four burners that ﬁ re into a heat exchanger submerged in a tank of water. When there is a call for humidity, the burners ﬁ re and generate steam until the call for humidity ends.

TAP/SOFTENED WATE

In tap/softened water GTS humidiﬁ ers, a conductivity probe (see Figure 3-2) monitors water level, requiring water conductivity to be at least 100 μS/cm to operate properly. Therefore, GTS tap/softened water models do not operate

ith RO/DI water (water that has been treated using reverse osmosis or deionized water). For operation with RO/DI water, see “RO/DI water option” on the next page

Note: GTS humidiﬁ ers for tap/softened water can be converted in the ﬁ eld

ith the RO/DI water option

FIGURE 2-1: GTS HUMIDIFIER, TAP/SOFTENED WATER

Duct dispersion option shown: Ultra-sorb Model LV

Supply water guidelines

Supply water quality is an important component of humidiﬁ er reliability and maintenance.

Examples:

• Corrosive water can decrease the service life of the humidiﬁ er.

• Excessive water hardness can increase the humidiﬁ er maintenance requirements.

To maximize humidiﬁ er service life and minimize humidiﬁ er maintenance, DriSteem has established guidelines for supply water See Table 2-1.

Table 2-1: DriSteem supply water guidelines

Chlorides*

RO or DI water Softened water Tap water

* Damage caused by

chloride corrosion is not covered by your DriSteem warranty.

< 5 ppm

< 25 ppm

< 50 ppm

Steam hose or tubing

Water level probe

Blower

Gas valve

Steam outlet

Heat exchanger

Control componentsFlue box

Supply water connection

Drain valve

Total hardness

Tap water < 500 ppm

RO, DI, or softened water Tap water

Silica < 15 ppm

You may wish to take action to mitigate potential negative effects to your humidiﬁ er. Supply water outside of these guidelines may void your DriSteem warranty. Please contact your DriSteem Representative or DriSteem Technical Support if you need advice.

OM-1247_ab mc_071912_1545

7 to 8

6.5 to 8.5

GTS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Product overview

PRODUCT OVERVIEW

RO/DI WATER OPTION

GTS humidiﬁ ers with the RO/DI water option control water level using a ﬂ oat valve (see Figure 3-3). These humidiﬁ ers produce chemical-free steam and provide accurate, reliable humidiﬁ cation control. These humidiﬁ ers are virtually maintenance-free and require very little or no downtime.

Note: GTS humidiﬁ ers with the RO/DI water option can be converted in the

ﬁ eld for use with tap/softened water.

FIGURE 3-2: GTS HUMIDIFIER, RO/DI WATER OPTION

Float for water ﬁ ll valve

Supply water line

Flue connection

Blower

Gas valve

Steam outlet

Redundant low water cutoff sensor

Float-operated low water cutoff

FIGURE 3-1: WATER LEVEL CONTROL FOR TAP/SOFTENED WATER

VLC-OM-030

Fill valve closes when water level rises to this probe.

Fill valve opens when water level is below this probe.

Low-water cutoff. The controller disables the burner if the water level drops below this probe.

Humidiﬁ ers using tap or softened water control water levels electronically using a three-rod probe. The controller responds with the above actions when the water level reaches each rod.

FIGURE 3-3: WATER LEVEL CONTROL FOR RO/DI-WATER OPTION

OM-1248

Air gap

Open drain

Note: Dashed lines indicate supplied by installer

Drain piping

Overﬂ ow outlet

Supply water connection

Drain valve

Fill valve

Float rod

VLC-OM-026

Humidiﬁ ers with the RO/DI water option control water level using a ﬂ oat valve. A low-water cutoff switch is used as a low-water safety.

Float ball

GTS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

SPECIFICATIONS

Models, capacities, electrical speciﬁ cations, and weights

Table 4-1: GTS models, capacities, electrical specifications, and weights, North American models

Maximum

GTS

model

GTS-100 75 34 100 29 2.76 9 34.1 48 181.7 700 320 375 170 800 365 500 230 1.8 2.8

GTS-200 150 68 200 59 5.52 18 68.1 48 181.7 700 320 375 170 800 365 500 230 1.8 2.8

GTS-300 225 102 300 88 8.28 27 102.2 52 196.8 850 385 450 205 1000 455 600 270 3.0 4.0

GTS-400 300 136 400 117 11.04 36 136.3 52 196.8 850 385 450 205 1000 455 600 270 3.0 4.0

GTS-500 375 170 500 147 13.80 45 170.3 76 287.7 1100 500 600 270 1450 660 950 430 4.5 5.5

GTS-600 450 204 600 176 16.56 54 204.4 76 287.7 1100 500 600 270 1450 660 950 430 4.5 5.5

GTS-700 525 238 700 205 19.32 63 238.5 89 336.9 1400 635 700 320 1750 795 1050 475 6.0 7.0

GTS-800 600 272 800 234 22.08 72 272.5 89 336.9 1400 635 700 320 1750 795 1050 475 6.0 7.0

* Add 15 full load amps for Outdoor Enclosure heater load on all GTS models, add 1 full load amp for an Outdoor Enclosure without heaters. ** Add 10% to account for skim and automatic drain/ﬂ ush features if utilized (tap/softened water units only).

CAPACITY NOTES

steam

capacity

lbs/hr kg/h MBh kW m

Input

Water usage at maximum

gals/hrlitres/

capacity**

Tank

volume

gals litres lbs kg lbs kg lbs kg lbs kg

Operating

• At sea level, approximately 152 Btu are required to raise the temperature of one pound of water from 60 °F to 212 °F. (At sea level, approximately

GTS GTS with Outdoor Enclosure

weight

Shipping

weight

Operating

weight

Important: See Pages 70 and 71 for

additional European model speciﬁ cations and capacity notes.

Shipping

weight

Full load

amps*

120V

60 Hz

352 kJ are required to raise the temperature of one kilogram of water from 16 °C to 100 °C.)

• An additional 970 Btu are required to change the state of one pound of 212 °F water to vapor. (An additional 2257 kJ are required to change the state of one kilogram of 100 °C water to vapor.)

• Another factor to consider is condensation steam loss from piping. See Table 32-2.

For more detailed information about condensation steam loss, see the DriSteem Design Guide, or see DriCalc, DriSteem’s free sizing and selection software, available at www. dristeem.com.

LP GAS

All models operate at rated input

HIGH ALTITUDE

An input derate exists when operating units at a high altitude. See Table 4-2 for high altitude derate information.

Table 4-2: High altitude derate

Altitude

feet meters

0–2000 0–610 0

2001–2500 610–765 2*

2501–3000 765–915 4*

3001–3500 915–1065 6*

3501–4000 1065–1220 8*

4001–4500 1220–1370 10

4501–5000 1370–1525 12

5001–5500 1525–1675 14

5501–6000 1675–1830 16

6001–6500 1830–1980 18

6501–7000 1980–2135 20

7001–7500 2135–2285 22

7501–8000 2285–2440 24

* GTS-400 models are derated 10% from

2001 through 4500 ft in Canada.

Input

derate %

230V

50 Hz

GTS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Dimensions

FIGURE 5-1: DIMENSIONS

SPECIFICATIONS

Side viewFront viewTop view

Table 5-1: Dimensions

OM-1203

Description

GTS-100 GTS-200

inches mm inches mm inches mm inches mm

GTS-300 GTS-400

GTS-500 GTS-600

5" (127 mm)

GTS-700 GTS-800

A Overall length 54.35 1380 54.35 1380 54.35 1380 54.35 1380

B Overall width 26.38 670 32.38 822 42.38 1076 48.38 1229

C Shroud height 41.00 1040 41.00 1040 41.00 1040 41.00 1040

Flue position

E 9.13 232 13.13 334 16.63 422 19.13 486

F Flue diameter 5.00 127 7.00 178 8.00 203 10.00 254

Steam outlet position

H 11.63 295 11.63 295 11.63 295 11.63 295

Fill valve connection position

K 19.38 492 19.38 492 19.38 492 19.38 492

Drain position

M 8.00 203 8.00 203 8.00 203 8.00 203

15.50 394 14.75 375 14.95 375 14.00 356

13.88 353 20.38 518 29.13 740 35.00 889

13.50 343 13.50 343 13.50 343 13.50 343

8.25 210 8.25 210 8.25 210 8.25 210

GTS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

INSTALLATION

Location and clearance recommendations

FINDING A LOCATION

• Provide a level, solid foundation for the humidiﬁ er.

WARNING

• Locate the humidiﬁ er as near as possible to a chimney or outside wall so that the ﬂ ue pipe from the humidiﬁ er is short and direct.

• Locate the unit so it and its electrical components are protected from water during humidiﬁ er operation and service.

• Install the humidiﬁ er in a location away (and protected) from drafts. If installed in a separate room, follow the instructions concerning combustion and ventilation air.

• Locate the humidiﬁ er in an area where leakage from the tank or its connections will not result in damage to the adjacent structure or to lower ﬂ oors of the structure. When such locations cannot be avoided, install a suitable drain pan (adequately drained) under the humidiﬁ er. The pan must not restrict combustion airﬂ ow.

• If located in an insulated space, keep the humidiﬁ er free and clear of insulating materials. Insulating material can be combustible. Inspect the humidiﬁ er area when the humidiﬁ er is installed or when insulation is added.

FIGURE 6-1: GTS CLEARANCE RECOMMENDATIONS

18" (457 mm)

Installation requirements

The humidiﬁ er must be installed by a qualiﬁ ed technician and meet the requirements of all governing codes. Failure to follow these instructions could cause severe bodily injury or death.

OM-1222

36" (914 mm)

30" (762 mm)

Note: DriSteem recommends a minimum of 1" (25 mm) clearance

between hot surfaces and combustible walls.

GTS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

INSTALLATION

Outdoor Enclosure:

OUTDOOR ENCLOSURE MOUNTING OPTION

Mounting

The Outdoor Enclosure option is used when the GTS is installed outdoors. The following information is not intended to supersede any requirements of federal, state, or governing codes having jurisdiction; prior to locating the unit, authorities having jurisdiction should be consulted.

FIGURE 7-1: OUTDOOR ENCLOSURE TYPICAL INSTALLATION OVERVIEW

Roof surface

Steam piping

GTS humidiﬁ er in Outdoor Enclosure

OM-1238

Electrical connections

Flue*

Curb

Drain piping

Water piping

* DriSteem recommends installing a drip tee directly after the factory supplied vent connection. Vertical section of ﬂ ue must be at least 5' or meet all

governing codes, whichever is greater. DriSteem recommends installing a high wind vent cap on all GTS humidiﬁ ers.

Vapor-logic keypad shown with optional cable length. Keypad ships standard with 5' (1.5 m) of cable

Gas piping

GTS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

INSTALLATION

Outdoor Enclosure: Mounting

LIFTING

The GTS Outdoor Enclosure must be lifted from the bottom base in a fashion that holds it level and keeps it from tipping, falling, or twisting. If the unit is severely twisted during handling, permanent damage can occur. It is the installer’s responsibility to verify the handling equipment’s capability to safely handle the unit.

Lift the Outdoor Enclosure by using special lifting lug hooks installed on the unit. All lifting operations must be accomplished with a load spreader of sufﬁ cient width to ensure that the lifting cables clear the side of the unit.

GTS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Outdoor Enclosure: Mounting

LOCATION

• The GTS Outdoor Enclosure must be level and located so there is enough clearance for opening the access panels.

• Verify that the position of pad or curb properly supports the unit and that support structure dimensions coincide with unit dimensions.

• Do not locate unit in areas where the surrounding air has high levels of particulates, such as some industrial parks or areas near highways.

• Locate unit so air intakes are not too close to exhaust fan outlets, gasoline storage, or other contaminants that potentially could cause dangerous situations. Using and storing gasoline or other ﬂ ammable vapors and liquids in open containers in the vicinity of this appliance is hazardous.

• When located on the roof, the air intakes must be a minimum of 14" (360 mm) off the roof to prevent intake of snow or splashed rain. The unit should be located so prevailing winds do not blow into the air intakes.

• An emergency drain is provided. In case of any water leak, water drains onto the roof through this emergency drain.

INSTALLATION

• A keypad with standard 5' (1.5 m) cable ships mounted to the subpanel in the GTS Outdoor Enclosure. The keypad must not come in contact with the strip heaters or block the intake ventilation hood.

• If constant monitoring of the unit is desired, or if the unit is located in a severe climate, install a remote mount keypad. Additional cable lengths up to 500' (152 m) are available as an option for this mounting conﬁ guration.

• Curbs (optional) are shipped knocked down for ease of transporting to the roof. Curbs are manufactured of 14-gauge galvanized steel and shipped with all hardware for bolt-together assembly. All holes are matched before leaving the factory. Curb is to be a minimum of 14" (360 mm) high. A closed-cell curb gasket with adhesive on one side is supplied with hardware. An installation drawing also is included. To prevent moisture from leaking into the building from either driving rain or melting snow, install the gasket between the top of the curb and the base surface of the unit.

GTS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

INSTALLATION

Outdoor Enclosure: Mounting

BEFORE YOU BEGIN

• Prior to installing the unit, remove all packaging.

• During the transit, unloading, and setting of the unit, bolts and nuts may become loose. Check that all nuts are tightened as required.

• There are three knockouts located on the right and left side of the enclosure. DriSteem recommends running electrical power into the enclosure at these knockouts.

• When pad-mounted or when the pipe chase cannot be used, the supply water and drain piping can be run through the knockouts, although preferably on the opposite side from the gas and electric.

• When unit is mounted on an outdoor curb, there must be a gasket between the top of the curb and the base surface of the unit to prevent moisture from leaking into the building from either driving rain or melting snow.

• The Outdoor Enclosure has two available steam distribution conﬁ gurations. The standard conﬁ guration has a steam outlet at the back of the Outdoor Enclosure for connecting to steam dispersion unit piping. The optional internal steam distribution conﬁ guration routes steam within the Outdoor Enclosure and down through the pipe chase into a building. See Figures 11-1 and 12-1.

Important: A pipe chase is located inside the burner section of the

enclosure. DriSteem recommends using this pipe chase for both the supply water piping and drain piping. Use insulation to completely ﬁ ll the area around the pipes to maintain proper enclosure pressure and protect unit components from elevated moisture levels within building; insulation must serve as an effective vapor barrier. Use the provided pipe chase cover to seal off the pipe chase. Cut necessary holes and seal after installation.

• The heater package has two thermostat-controlled heaters: one strip heater is located in the control section, and one strip heater is located in the burner section to keep the enclosure at a constant minimum temperature. Once the humidiﬁ er tank is full and up to temperature, the tank will keep the enclosure at an appropriate temperature. The heaters will turn off.

• See “Wiring” on Page 15 and “Piping” beginning on Page 16 for directions on installing electrical, gas, ﬂ ue, drain, and water connections. A separate electrical service connection for the outdoor GTS is recommended. Insulation and/or heat taping of water piping is recommended.

GTS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Outdoor Enclosure: Mounting

FIGURE 11-1: OUTDOOR ENCLOSURE INSTALLATION DETAIL

Normally closed ﬁ ll valve (by factory)

Supply water piping (by installer) (See Note 2)

Open to drain

Vacuum breaker (by installer)

120 V (230 V in

Europe) from unit

disconnect or other

source (See Note 1)

Normally closed (fail

closed) min 3/8"

electric valve

(by installer)

Domestic water, 80 psig (582 kPa) maximum

Open drain (See Note 4)

GTS humidiﬁ er in Outdoor Enclosure installed on rooftop

Drain line, min. 1½" (See Note 3)

Optional water seal (P-trap) drain line, min. 1½" (DN40) (See Note 3)

Normally open (fail open) min 1/2" electric valve (by installer)

Open drain (See Note 4)

Roof decking

OM-4045

Disconnect (by installer); see Detail A

120 V supply (230 V in Europe)

120 V (230 V in Europe)

Disconnect

Heated building interior

INSTALLATION

Detail A

box

To valves (by installer) (See Note 1)

To GTS humidiﬁ er

Piping notes:

1. Insulate supply water piping to avoid dripping from condensation. To ensure that water does not remain in the ﬁ ll line and freeze if there is a loss of power, DriSteem recommends ﬁ eld installing additional valves upstream of the ﬁ ll valve in a conditioned space. Power these valves on the same circuit as the GTS; if the power goes off, water drains out of the ﬁ ll line to prevent freezing (see above). Supply power for these valves from the same circuit that supplies the GTS.

2. Ensure that water lines are protected from freezing conditions.

• Install heat tracing and insulation on ﬁ ll piping inside the Outdoor Enclosure.

• In extreme or critical applications in which the unlikely event of a water leak could cause severe damage, DriSteem recommends a thermostat

with a remote sensor on the ﬁ ll line to cut power to the GTS and safety valves to stop ﬁ ll water to the GTS and drain the ﬁ ll piping when the temperature is below freezing.

3. DriSteem recommends copper or iron drain piping for Outdoor Enclosures. On a loss of power the tank water will drain, but not be cooled by the Drane-kooler because of the ﬁ eld supplied safety shut-off valves. If it is critical to keep the Drane-kooler functional in the case of a power loss, disconnect the Drane-kooler and relocate it down inside the conditioned space of the building. Pipe the supply water for the Drane-kooler before the safety shut-off valves.

4. If copper or iron piping is used for both the ﬁ ll and drain piping, these drains may be tied together. Locate 1" air gap only in spaces with adequate temperature and air movement to absorb ﬂ ash steam; otherwise, condensation may form on nearby surfaces. Refer to governing codes for drain pipe size and maximum discharge water temperature.

GTS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

INSTALLATION

Outdoor Enclosure: Mounting

FIGURE 12-1: GTS OUTDOOR ENCLOSURE WITH STANDARD OR OPTIONAL STEAM OUTLET, ELEVATION VIEW

Standard steam outlet Optional steam outlet

OM-1228M

Ventilation fans

Combustion air intake

1½" (38 mm) knockouts 4" (102 mm) o.c.

Pipe chase

Emergency drain

Flue piping (by installer)

Steam outlet (See Note 1)

GTS humidiﬁ er

Power block

OM-1227M

Ventilation fans

Combustion air intake

1½" (38 mm) knockouts 4" (102 mm) o.c.

Pipe chase

Emergency drain

Flue piping (by others)

Steam outlet (See Note 1)

GTS humidiﬁ er

Power block

Notes:

1. The Outdoor Enclosure has two available steam distribution conﬁ gurations. The standard conﬁ guration has a steam outlet at the back of the Outdoor Enclosure for connecting to steam dispersion unit piping. The optional internal steam distribution conﬁ guration routes steam within the Outdoor Enclosure and down through the enclosure pipe chase into a building.

2. There are three knockouts located on the right and left side of the enclosure. Run the electrical power and gas piping into the enclosure at these knockouts.

3. Piping from the GTS unit to the steam outlet is stainless steel pipe. Piping from the steam outlet to the dispersion assembly is provided by the installer. Choose interconnecting steam piping material that is appropriate for the application (e.g., for high-purity steam applications, consider using stainless steel interconnecting steam tubing). See Table 18-1 for steam outlet sizes.

4. The GTS housed in an Outdoor Enclosure will operate properly in operating temperature of –40 °F to 122 °F (–40 °C to 50 °C).

5. Install external ﬂ ue piping shall be provided by installers and ﬁ eld installed. The ﬂ ue of the Outdoor Enclosure exits out the left side of the unit and a vertical stack must be constructed. The stack must be a minimum of 5–10 feet (1.5–3.0 m) above the top of the roof. However, the exact height varies depending on unit size, climate, etc. Governing codes prevail. A UL or UL/CSA (or equivalent) listed cap must be used and a drip tee included. DriSteem recommends installing a high-wind vent cap on all GTS humidiﬁ ers.

Table 12-1: Outdoor Enclosure dimensions

Description

inches mm inches mm inches mm inches mm

A Enclosure height 54.63 1388 54.63 1388 54.63 1388 54.63 1388

B Enclosure width 26.00 660 32.00 813 42.00 1067 48.00 1219

C Enclosure length 57.25 1454 57.25 1454 57.25 1454 57.25 1454

GTS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

GTS-100 GTS-200

GTS-300 GTS-400

GTS-500 GTS-600

GTS-700 GTS-800

INSTALLATION

Outdoor Enclosure: Mounting

FIGURE 13-1: OUTDOOR ENCLOSURE TOP VIEW FIGURE 13-2: OUTDOOR ENCLOSURE

MOUNTED ON A CURB

Exit for standard steam outlet

OM-7432

GTS humidiﬁ er

Exit for optional steam outlet (through pipe chase)

Flue (by installer)

Burner section heater

Access panel door

Table 13-1: Outdoor Enclosure top view dimensions

GTS-100

Description

GTS-200

inches mm inches mm inches mm inches mm

GTS-300 GTS-400

Control panel heater

Access panel door

Intake ventilation fans

GTS-500 GTS-600

OM-7431

14"

(356 mm)

FIGURE 13-3: OUTDOOR ENCLOSURE MOUNTED FLUSH

OM-7430

GTS-700 GTS-800

T Enclosure width 26.00 660 32.00 813 42.00 1067 48.00 1219

Pipe chase position

V 3.00 76 3.00 76 3.00 76 3.00 76

Pipe chase size

X 11.00 279 11.00 279 11.00 279 11.00 279

Steam pipe position

Z 21.00 533 27.00 686 37.00 940 43.00 109

3.00 76 3.00 76 3.00 76 3.00 76

16.00 406 16.00 406 16.00 406 16.00 406

14.12 359 20.12 511 30.12 765 36.12 917

GTS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

INSTALLATION

Outdoor Enclosure: Operation

SEQUENCE OF OPERATION

• Power is applied to the Outdoor Enclosure.

• If the ambient temperature in the enclosure is below

50 °F (10 °C), the strip heaters are powered up. The strip heaters remain

on until the enclosure reaches 50 °F (10 °C) to ensure that the temperature inside the enclosure does not drop below the freezing point.

• When there is no call for humidity, an aquastat maintains tank temperature

at the factory default of 70 °F (21 °C). This temperature can be reset in the ﬁ eld to be from 40-180 °F (4-82 °C).

• When the ambient temperature in the enclosure reaches 85 °F (29 °C), two

ventilation fans turn on to cool the electronic components. A high limit is also provided to power down the GTS if the enclosure temperature reaches 150 °F (66 °C). In a high limit situation, the ventilation fans continue to run and once the enclosure temperature falls below 130 °F (54 °C), the GTS automatically resumes normal operation.

• A normally open drain valve is provided on the GTS Outdoor Enclosure to

drain the tank in the event of a power loss.

GTS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Wiring

INSTALLATION

WARNING

Grounding

Installation must meet the requirements of governing codes or, in the absence of governing codes, in accordance with the National Electrical Code, ANSI/NFPA 70, or Canadian Electrical Code, CSA C22.1, or IEE wiring regulations (BS7671). The electrical subpanel must have an uninterrupted or unbroken ground to minimize personal injury if an electrical fault should occur. This ground can consist of electrical wire or conduit approved for electrical ground when installed in accordance with existing electrical codes. Do not use gas piping as an electrical ground.

• GTS humidiﬁ ers must be supplied with 120 Vac, 60 Hz (North American models) or 230 Vac, 50 Hz (European models) separately fused electrical service. The GTS humidiﬁ er is equipped with a transformer to step down the voltage to 24 Vac control voltage.

• When installed, the GTS humidiﬁ er must be electrically grounded in accordance with governing codes or, in the absence of governing codes, in accordance with the National Electrical Code, ANSI/NFPA 70; or Canadian Electrical Code, CSA C22.1; or IEE wiring regulations (BS7671).

In North America, the electrical conductors shall be Type MTW (105 °C)

AWG #14 (2.5 mm2) wire for 120 V line voltage , with BLACK WIRE for HOT, WHITE WIRE for NEUTRAL, GREEN AND YELLOW WIRE for GROUND. Units with Outdoor Enclosure must use AWG #12 (4 mm2) for 120 V line voltage. Use #18 gauge (1 mm2) for control wiring.

WARNING

Fire hazard

Do not connect aluminum wire between disconnect switch and humidiﬁ er. Use only copper wire. Failure to follow these instructions could cause a ﬁ re, resulting in severe bodily injury, death, or signiﬁ cant property damage.

In Europe, the electrical conductors shall be Type MTW (105 °C) 2.5 mm2

wire for line voltage (230V), with BLACK WIRE for LINE, BLUE WIRE for NEUTRAL, GREEN AND YELLOW WIRE for GROUND, and 2.5 mm2 wire for control wiring.

• All electrical components and wiring must be protected from mechanical damage and water. The control system requires an earth ground for proper operation.

• The GTS humidiﬁ er is adjusted for correct performance. Only a qualiﬁ ed gas appliance technician may alter throttle setting.

• Check the electric current characteristics and capacity requirements against the nameplate. All wiring must be in accordance with all governing codes and with the GTS wiring diagrams located inside the control cabinet. See the electrical speciﬁ cations in Table 4-1 (North America) and Table 71-1 (Europe).

• Refer to the Vapor-logic Installation and Operation Manual for additional information on the controller furnished with this GTS humidiﬁ er.

GTS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

INSTALLATION

Piping: Tap/softened water

FIGURE 16-1: GTS FIELD PIPING OVERVIEW, TAP/SOFTENED WATER

Optional condensate return piping from dispersion

unit; 3/4" pipe thread (DN20) ﬁ tting at humidiﬁ er

Shock arrester recommended to reduce

water hammer, by installer

Flue size per governing codes. Do not reduce.

Steam hose or tubing

Install level

Supply water line; water pressure range

25 to 80 psi (172 to 582 kPa); water

conductivity minimum 100 μS/cm

Flue connection

Offset humidiﬁ er from ﬂ oor drain to prevent

ﬂ ash steam from rising into the humidiﬁ er

1½" NPT (DN40) drain piping must be

rated for 212 °F (100 °C) (by installer)

1" (25 mm) air gap

Notes:

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

• Dashed lines indicate provided by installer.

• Humidiﬁ er ﬂ ue gases must be vented to the outside atmosphere.

• Supply water inlet is more than 1" (25 mm) above skim/overﬂ ow port, eliminating the possibility of backﬂ ow or siphoning from tank. No additional backﬂ ow prevention is required; however, governing codes prevail.

• Damage caused by chloride corrosion is not covered by your DriSteem warranty.

• See the next page for recommended supply water piping for RO/DI water models.

Air vent tube

6" (150 mm) minimum vent height

Air vent height must be equal to or greater than dimension H (see Table 16-1)

Install level

Gas inlet connection

Open drain required. See ﬁ rst note below.

OM-1208b

Table 16-1: Height (H) required to overcome GTS internal pressure (H)

GTS model

(tap/softened

water)

100, 200 35 889

300, 400, 500,

600, 700, 800

Dimension H in drawing above = height required to

overcome humidiﬁ er internal pressure

inches mm

41 1041

GTS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

RO/DI water option Piping:

FIGURE 17-1: GTS FIELD PIPING OVERVIEW, RO/DI WATER OPTION

Steam hose or tubing

INSTALLATION

Optional condensate return piping from dispersion unit; 3/4" pipe thread (DN20) ﬁ tting at humidiﬁ er

Flue size per governing codes. Do not reduce.

Supply water line; water pressure range 25 psi to 80 psi (172 kPa to 582 kPa); ﬁ rst 3' (1 m) of supply line must be rated for 212 °F (100 °C)

Flue connection

Offset humidiﬁ er from ﬂ oor drain to prevent ﬂ ash steam from rising into the humidiﬁ er

1½" (DN40) drain piping must be rated for 212 °F (100 °C)

1" (25 mm) air gap

Install level

Gas inlet connection

Open drain required. See ﬁ rst note below.

Air vent tube

If water piping to humidiﬁ er is nonmetallic, we recommend a 2" (50 mm) water seal in the supply water line to isolate steam during RO/DI water system maintenance.

Inlet strainer by installer

6" (150 mm) minimum vent height

OM-1223

Air vent tube height must be equal to or greater than dimension H (see Table 17-1)

Notes:

• Dashed lines indicate provided by installer.

• Humidiﬁ er ﬂ ue gases must be vented to the outside atmosphere.

• Supply water inlet is more than 1" (25 mm) above overﬂ ow port, eliminating the possibility of backﬂ ow or siphoning from tank. No additional backﬂ ow prevention is required; however, governing codes prevail.

• Damage caused by chloride corrosion is not covered by your DriSteem warranty.

• In order to minimize RO/DI water use, disconnect factory piping to the water tempering device and pipe directly to tap water.

• See the previous page for recommended supply water piping for tap/ softened water models.

Table 17-1: Height (H) required to overcome GTS internal pressure

GTS model

(RO/DI water

option)

100, 200 35 889

300, 400, 500,

600, 700, 800

Dimension H in drawing above = height required to

overcome humidiﬁ er internal pressure

inches mm

41 1041

GTS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

INSTALLATION

Supply water and drain overflow connections Piping:

Regardless of the type of water used, the following general instructions MUST be followed:

• Make union connections at the humidiﬁ er on the make-up water supply and drain/overﬂ ow lines.

• Provide a shutoff valve in the supply water line to isolate the humidiﬁ er from the water system while servicing.

• Shock arrester, provided by installer, is recommended to reduce water hammer.

• A 1" (25 mm) opening is provided in the humidiﬁ er tank to accommodate skim and/or overﬂ ow protection.

Note: Follow governing code requirements regarding size of drain pipe.

• Use insulating unions or bushings to make connections between copper and other dissimilar metal ﬁ ttings, such as galvanized steel. These insulating ﬁ ttings are required to minimize electrolytic corrosion, which results from the direct connection of dissimilar metals in a water system.

• Before beginning ignition sequence of the humidiﬁ er at a new installation, make sure the humidiﬁ er tank is full of water and the water is free to ﬂ ow into the tank.

• If planning to use heated supply water, disconnect the supply water line to the water tempering device at the ﬁ ll manifold and reconnect it to a cold water supply. This will ensure that the water tempering device operates properly.

Table 18-1: Connection sizes

Description

Gas supply

Sealed combustion piping (optional) 4 100 4 100 4 100 4 100

Flue vent 5 125 7 180 8 200 10 250

Supply water to ﬁ ll valve and tempering device*

Drain

Steam outlet**

Condensate return (recommended)

Notes:

To minimize RO/DI water use, disconnect factory piping to the water tempering device and pipe directly to tap water.

For pipe thread steam outlet options, see DriCalc, DriSteem’s free sizing and selection software, available at www. dristeem.com.

• If planning to use heated supply water, disconnect the water line to the water tempering device at the ﬁ ll manifold, and reconnect it to a cold water supply. This will ensure that the water tempering device operates properly.

GTS-100 and GTS-200 GTS-300 and GTS-400 GTS-500 and GTS-600 GTS-700 and GTS-800

inches DN inches DN inches DN inches DN

1/2

(pipe thread)

3/8

(pipe thread)

1½

(pipe thread)

(hose)

3/4

(pipe thread)

3/8

(pipe thread)

1½

(pipe thread)

(ﬂ ange)

3/4

(pipe thread)

3/8

(pipe thread)

1½

(pipe thread)

(ﬂ ange)

3/4

(pipe thread)

100

1¼

(pipe thread)

3/8

(pipe thread)

1½

(pipe thread)

(ﬂ ange)

3/4

(pipe thread)

100

GTS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

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DriSteem GTS SERIES Installation, Operation And Maintenance Manual

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Frequently Asked Questions

User Manual