DriSteem GTS Installation, Operation And Maintenance Manual

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Page 1

IMPORTANT: Read and save these instructions.

GTS

Gas -to -St eam Hum i di f ie r

In st all at io n, O peratio n,

an d M ainte na nc e Manu al

W A R N I N G !

If the information in this manual is not followed exactly, a ﬁre or explosion may result causing property damage, personal injury, or loss of life.

Do not store or use gasoline or other ﬂammable vapors and liquids in the vicinity of this or any other appliance.

W H A T T O D O I F Y O U S M E L L G A S

• 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 fire department.

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

For toll-free technical support call: 1-800-328-4447

Page 2

ATTENTION INSTALLER

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

DRI-STEEM technical support

800-328-4447

I m po r ta n t: Troubleshooting information for this humidifier is located in the Vapor-logic4 Installation and Operation manual shipped with your humidifier. If you do not have this manual, go to the literature section at www.dristeem.com to download or order a copy.

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 (include dispersion nonwetting distance graphs):

– GTS – Ultra-sorb

• Installation, Operation, and Maintenance

– Ultra-sorb – Vapor-logic4® (includes sensor placement recommendations and troubleshooting information)

•

In Dri-calc:

Dri-calc® is our humidification system sizing and selection software, which can be ordered at www.dristeem.com.

Included in Dri-calc:

manuals:

DRI-STEEM Design Guide

loss tables and general humidification information)

(includes steam

European models

The DRI-STEEM GTS Gas-to-Steam Humidifier has been certified 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.

• A comprehensive library of installation guide documents, including:

– Rapid-sorb installation instructions for vertical airflows – Recommended dispersion placement within a duct or air handler – Recommended sensor placement

Or call us at 800-328-4447

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

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Ta b l e o f c o n t e n t s

Overview

Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Product overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Specifications and capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Installation

Locating the humidifier, clearance recommendations . . . . . . 10

Outdoor enclosure mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Wiring: Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Piping: Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Piping: Supply water and drain overflow connections . . . . . . . 22

Piping: Water supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Piping: Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Piping: Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Combustion and ventilation air . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Vertical and horizontal venting . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Dispersion: General instructions . . . . . . . . . . . . . . . . . . . . . . . . . 35

Dispersion: Interconnecting piping requirements . . . . . . . . . . 36

Dispersion: Drip tee installation . . . . . . . . . . . . . . . . . . . . . . . . . 38

Dispersion: Single tube and multiple tube . . . . . . . . . . . . . . . . . 39

Dispersion: Rapid-sorb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Dispersion: Area-type fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Operation

Start-up procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Safety systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Start-up commissioning checklist . . . . . . . . . . . . . . . . . . . . . . . . 56

Maintenance

For both GTS and GTS-DI models . . . . . . . . . . . . . . . . . . . . . . . 58

Maintenance: GTS standard water models . . . . . . . . . . . . . . . . . 60

Maintenance: GTS-DI models . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Troubleshooting

GTS troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Replacement parts

Replacement parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Electrical replacement parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Outdoor enclosure electrical replacement parts . . . . . . . . . . . . 74

Information for European models only

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76-77

Warranty

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Back cover

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S a f e t y p r e c a u t i o n s

W A R N I N G !

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

W A R N I N G !

If you do not follow the instructions in this manual exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

For your safety, read this entire manual before installing or operating the GTS humidifier.

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 floor because gas can be heavier than air and settle on the floor.

FOR YOUR SAFETY: WHAT TO DO 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 a neighbor’s phone. Follow the gas supplier’s instructions.

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

C. Do not use this appliance if any part has been under water.

Immediately call a qualified 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.

More safety precautions are on the next page ▶

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S a f e t y p r e c a u t i o n s ( c o n t i n u e d )

Safe operating instructions

1. STOP! Read the safety information on the previous page.

2. Set the humidistat to 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 control access panel.

6. Unplug the black power plug on the gas valve (see Figure 3-1).

7. Wait five minutes to clear out any gas.

If you then smell gas, STOP! Follow “B” in the safety information on the previous page.

If you don’t smell gas, go to the next step.

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

9. Replace control access panel.

10. Turn on all electric power to the appliance.

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.

11. Set humidistat to desired setting.

12. If the appliance will not operate, follow the instructions on this page titled, “To turn off gas to appliance,” and call your service technician or gas supplier.

More safety precautions are on the next page ▶

Figure 3-1: Detail of gas valve

Top view

Gas valve

Gas valve power plug

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S a f e t y p r e c a u t i o n s ( c o n t i n u e d )

W A R N I N G !

Improper installation, adjustment, alteration, service, maintenance, or use can cause carbon monoxide poisoning, explosion, fire, electrical shock, or other conditions which may cause personal injury or property damage. Consult a qualified installer, service agency, local gas supplier, or your distributor or branch for information or assistance. The qualified installer or agency must use only factory authorized and listed kits or accessories when modifying this product. A failure to follow this warning can cause electrical shock, fire, personal injury, or death.

• Inspect humidifier and accessories upon arrival for damaged, missing, or improper parts. If there is a problem, call DRI-STEEM.

• Application of this humidifier should have special attention given to vent sizing and material, gas input rate, and unit sizing. Improper installation or misapplication of the humidifier 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 fire extinguisher available during start-up, adjustment procedures, and service calls.

• Do not use this appliance if any part has been under water. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control that has been under water.

• Do not lift humidifier by gas controls, gas manifold, fire 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 non-pressurized vessel. DO NOT restrict piping where steam exits the humidifier. 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.

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More safety precautions are on the next page ▶

Page 7

S a f e t y p r e c a u t i o n s ( c o n t i n u e d )

W A R N I N G !

• 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 flammable atmospheres laden with grain dust, sawdust, or similar airborne materials.

• Installation of humidifier 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 gasfired unit in areas where chlorinated, halogenated, or acid vapors are present in the atmosphere.

• Locate the humidifier in an area clear of combustible materials, gasoline, and other flammable vapors and liquids.

• 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 the table and information on Page 30 for additional information.

• Remove all shipping brackets and materials before operating the humidifier.

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

• Humidifier flue 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 humidifier.

• 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).

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Figure 6-1: GTS standard water model VLC

Steam outlet

Water level probe

Water supply line

P r o d u c t o v e r v i e w

Optional Ultra-sorb dispersion panel installed in duct

Vapor hose

Flue box

Blower

Gas valve

Notes:

• GTS standard water models can be converted in the field for use with deionized/reverse osmosis (DI/RO) water. GTS-DI models can be converted in the field for use with potable or softened water.

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

Heat exchanger

Control components

Drain valve

OM-1201

GTS standard water models

GTS standard water gas-fired humidifiers burn either natural or propane gas to heat potable or softened fill water into steam for humidification. The unit has from one to four burners that fire into a heat exchanger submerged in a tank of water. When there is a call for humidity, the burners fire and generate steam until the call for humidity ends. A probe monitors water level, requiring water conductivity to be at least 100 µS/cm to operate properly. Therefore, GTS standard water models do not operate with demineralized water (deionized or reverse osmosis treated water). For demineralized water operation, use the GTS-DI model (described on next page).

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P r o d u c t o v e r v i e w ( c o n t i n u e d )

Figure 7-1: GTS-DI (DI/RO water model)

Blower

Gas valve

Water supply line

Flue connection

Float for water ﬁll valve

Air gap

Open drain

Steam outlet

Redundant low water cutoff sensor

Float-operated low water cutoff

Overﬂow outlet

Drain valve

Drain piping (by installer)

GTS-DI models

GTS-DI humidifiers burn either natural or propane gas to heat deionized (DI) or reverse osmosis (RO) fill water into steam for humidification. GTS-DI models control water level using a float valve.

GTS-DI models are virtually maintenance-free and require very little or no downtime.

The GTS-DI model is available for use with deionized or reverse osmosis water. This unit produces chemical-free steam and reliable, accurate humidification control.

DRI - STEE M G TS Hu m idif i e r Ins t alla t i on, O p erat i o n, and Main t e nanc e Manu a l • Pag e 7

OM-1202

Notes:

• GTS standard water models can be converted in the field for use with deionized/reverse osmosis (DI/RO) water. GTS-DI models can be converted in the field for use with potable or softened water.

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

Page 10

S p e c i f i c a t i o n s , ca p a c i t i e s , a n d w e i g h t s

Table 8-1: GTS specifications, capacities, and weights for North American models only

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

Note:

* Add 15 full load amps for outdoor enclosure heater load on all GTS models ** Add 10% to account for skim and automatic drain/ﬂush features if utilized (standard water units only).

steam

capacity

lbs/hr kg/h MBh kW m3/h

Input

I m po r t an t : See Pages 76-77 for

additional European model specifications and capacity notes.

Water usage at maximum

capacity**

gals/hrlitres/

Tank

volume

gals litres lbs kg lbs kg lbs kg lbs kg

Operating

weight

Capacity notes

• 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

GTS GTS with outdoor enclosure

Shipping

weight

Operating

weight

Shipping

weight

Full load

amps*

120 V 60 Hz

230 V 50 Hz

level, approximately 352 kJ are required to raise the temperature

Table 8-2: 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

derate %

Input

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. Use the following general steam loss guidelines:

– Vapor hose: 0.15 lbs/hr/ft (0.22 kg/h/m) – Insulated pipe: 0.05 lbs/hr/ft (0.07 kg/h/m) – Hard pipe and dispersion tubes: 0.50 lbs/hr/ft (0.7 kg/h/m) – High-eciency dispersion tubes: 0.20 lbs/hr/ (0.298 kg/h/m)

For more detailed information about condensation steam loss, see the DRI-STEEM Design Guide or our software program, Dri-calc.

LP gas

All models operate at rated input.

High altitude

An input derate exists when operating units at a high altitude. See Table 8-2 for high altitude derate information.

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D i m e n s i o n s

Figure 9-1: Dimensions

Side viewFront viewTop view

Table 9-1: Dimensions

Description

GTS-100 GTS-200

inches mm inches mm inches mm inches mm

GTS-300 GTS-400

GTS-500 GTS-600

5" (127 mm)

OM-1203

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 13.00 330 15.63 397 18.63 475 21.00 533

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 13.00 330 13.00 330 13.00 330 13.00 330

Drain position

M 8.00 203 8.00 203 8.00 203 8.00 203

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18.00 457 17.00 432 17.00 432 16.25 413

14.00 356 20.50 521 29.25 743 35.25 895

13.00 330 13.00 330 13.00 330 13.00 330

8.75 222 8.75 222 8.75 222 8.75 222

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L o c a t i n g t h e h u m i d i f i e r a n d c l e a r a n c e r e c o m m e n d a t i o n s

Locating the humidifier

• Provide a level, solid foundation for the humidifier.

• Locate the humidifier as near as possible to a chimney or outside wall so that the flue pipe from the humidifier is short and direct.

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

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

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

• Do not install the humidifier on carpeting, tile or other combustible material other than wood flooring (indoor application only).

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

Figure 10-1: GTS clearance recommendations

18" (457 mm)

36" (914 mm)

30" (762 mm)

OM-1222

Note:

DRI-STEEM recommends a minimum of 1" (25 mm) clearance between hot surfaces and combustible walls.

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O u t d o o r e n c l o s u r e m o u n t i n g

Outdoor enclosure mounting option

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 11-1: Outdoor enclosure typical installation overview

Steam piping

GTS humidiﬁer in outdoor enclosure

Roof surface

Flue

Curb

Drain piping

Water piping

Electrical connections

Gas piping

Vapor-logic4 keypad shown with optional cable length. Keypad ships standard with 5' (1.5 m) of cable

OM-1238

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O u t d o o r e n c l o s u r e m o u n t i n g ( c o n t i n u e d )

Handling

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 sufficient width to ensure that the lifting cables clear the side of the unit.

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O u t d o o r e n c l o s u r e m o u n t i n g ( c o n t i n u e d )

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 flammable 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.

• 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 configuration.

• 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.

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O u t d o o r e n c l o s u r e m o u n t i n g ( c o n t i n u e d )

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. DRI-STEEM recommends running electrical power into the enclosure at these knockouts.

• 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 configurations. The standard configuration has a steam outlet at the back of the outdoor enclosure for connecting to steam dispersion unit piping. The optional internal steam distribution configuration routes steam within the outdoor enclosure and down through the pipe chase into a building. See drawings on Pages 15 and 16.

I m po r ta n t : A pipe chase is located inside the burner section

of the enclosure. DRI-STEEM recommends using this pipe chase for both the supply water piping and drain piping. Use insulation to completely fill 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 humidifier tank is full and up to temperature, the tank will keep the enclosure at an appropriate temperature. The heaters will turn off.

• Refer to the installation section of this manual for directions on installing electrical, gas, flue, 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.

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Page 17

O u t d o o r e n c l o s u r e m o u n t i n g ( c o n t i n u e d )

Piping

• Insulate supply water piping to avoid dripping from condensation. To ensure that water does not remain in the fill line and freeze if there is a loss of power, DRI-STEEM recommends field installing additional valves upstream of the fill 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 fill line to prevent freezing (see Figure 15-1).

• 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.

• Install external flue piping shall be provided by installers and field installed. The flue 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.

Figure 15-1: Outdoor enclosure installation detail

Normally closed ﬁll valve (by factory)

Make-up water supply piping (by installer)

Open to drain

Vent with check valve (by installer)

120 V (230 V in Europe)

from unit disconnect or

other source

Normally closed (fail closed) min 3/8" electric valve (by installer)

Domestic water, 80 psig (582 kPa) maximum

OM-4045

GTS humidiﬁer in outdoor enclosure installed on roof top

Roof decking

Drain line, min. 1½" electric valve

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

Normally open (fail open) min ½" electric valve (by installer)

Open drain

Disconnect (by installer); see Detail A

120 V supply (230 V in Europe)

Heated building interior

120 V (230 V in Europe)

Disconnect box

Detail A

To valves (by installer)

To GTS humidiﬁer

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Page 18

O u t d o o r e n c l o s u r e m o u n t i n g ( c o n t i n u e d )

Figure 16-1: GTS outdoor enclosure with standard or optional steam outlet, elevation view

Standard steam outlet Optional steam outlet

Flue piping (by installer)

Steam outlet (See Note 1)

Ventilation fans

Combustion

air intake

1½" (38 mm) knockouts

4" (102 mm) o.c.

Pipe chase

Notes:

1. The outdoor enclosure has two available steam distribution conﬁgurations. The standard conﬁguration has a steam outlet at the back of the outdoor enclosure for connecting to steam dispersion unit piping. The optional internal steam distribution conﬁguration 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 piping). See Page 22 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).

Emergency drain

GTS humidiﬁer

Power block

OM-1228M

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 humidiﬁer

Power block

OM-1227M

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Page 19

O u t d o o r e n c l o s u r e m o u n t i n g ( c o n t i n u e d )

Table 17-1: Outdoor enclosure dimensions

GTS-100

Description

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-200

inches mm inches mm inches mm inches mm

GTS-300 GTS-400

GTS-500 GTS-600

GTS-700 GTS-800

Figure 17-1: Outdoor enclosure mounted on a curb

14"

(356 mm)

OM-7431

Table 17-2: Outdoor enclosure top view dimensions

GTS-100

Description

Enclosure

width

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

GTS-200

inches mm inches mm inches mm inches mm

26.00 660 32.00 813 42.00 1067 48.00 1219

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-300 GTS-400

GTS-500 GTS-600

GTS-700 GTS-800

Figure 17-2: Outdoor enclosure mounted flush

Figure 17-3: Outdoor enclosure top view

Exit for standard steam outlet

GTS humidiﬁer

Exit for optional steam outlet (through pipe chase)

Flue (by installer)

Burner section heater

Access panel door

OM-7430

Control panel heater

Access panel door

Intake ventilation fans

OM-7432

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Page 20

O u t d o o r e n c l o s u r e o p e r a t i o n

GTS outdoor enclosure 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. If the enclosure

temperature reaches 35 °F (2 °C), power is allowed to the GTS subpanel and the GTS unit is enabled. 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 the enclosure temperature is at or above 50 °F (10 °C), the GTS tank heats the enclosure. 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 field 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.

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Page 21

W i r i n g : E l e c t r i c a l co n n e c t i o n s

W A R N I N G !

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 humidifiers must be supplied with 120-volt AC, 60 Hz (North American models) or 230-volt AC, 50 Hz (European models) separately fused electrical service. The GTS humidifier is equipped with a transformer to step down the voltage to 24 VAC control voltage.

• When installed, the GTS humidifier 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.

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 humidifier is adjusted for correct performance. Only a qualified 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 table on Page 8 for information on the various models.

• Refer to the Vapor-logic4 Installation and Operation Manual for additional information on the controller furnished with this GTS humidifier.

W A R N I N G !

Do not connect aluminum wire between disconnect switch and humidiﬁer. Use only copper wire. Failure to follow these instructions could cause a ﬁre, resulting in severe bodily injury, death, or signiﬁcant property damage.

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Page 22

Figure 20-1: Field piping overview for GTS standard water models

Optional condensate return piping from dispersion

unit; ¾" pipe thread (DN20) ﬁtting at humidiﬁer

Shock arrester recommended to reduce water hammer, by installer

Flue size per governing codes. Do not reduce.

Water supply line; water

pressure range 25 psi to 80 psi

(172 kPa to 582 kPa); water

conductivity minimum 100 µS/cm

G T S p i p i n g , s t a n d a r d w a t e r m o d e l s

Steam hose, pipe or tubing

Install level

Air vent tube

6" (150 mm)

minimum vent height

Flue connection

Offset humidiﬁer from ﬂoor drain to prevent ﬂash steam from rising into the humidiﬁer

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 ﬂash 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.

• Humidiﬁer ﬂue gases must be vented to the outside atmosphere.

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

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

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

Air vent height must be equal to or greater than dimension “H” (see table below)

Install level

Gas inlet connection

Open drain required. See ﬁrst note below.

Table 20-1: Height required to overcome GTS internal pressure (H)

H = Height required to overcome humidiﬁer internal pressure

GTS model

number

inches mm

100, 200 35 889

300, 400, 500, 600,

700, 800

41 1041

OM-1208

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Page 23

G T S p i p i n g , D I / R O w a t e r m o d e l s

’

Figure 21-1: Field piping overview for GTS DI/RO water models

Optional condensate return piping from dispersion unit;

¾" pipe thread (DN20)

ﬁtting at humidiﬁer

Flue size per governing codes. Do not reduce.

Water supply line; water

pressure range 25 psi to 80 psi

(172 kPa to 582 kPa); ﬁrst 3'

(1 m) of supply line must be

rated for 212 °F (100 °C)

Steam hose, pipe or tubing

Install level

minimum vent height

Air vent tube If water piping to humidiﬁer is nonmetallic, we recommend

a 2" (50 mm) water seal in the supply line to isolate steam during DI/RO water system maintenance.

Inlet strainer by installer

6" (150 mm)

Flue connection

Offset humidiﬁer from ﬂoor

drain to prevent ﬂash steam

from rising into the humidiﬁer

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

1" (25 mm) air gap

Gas inlet connection

Open drain required. See ﬁrst note below.

Table 21-1: Height required to overcome GTS-DI internal pressure (H)

H = Height required to overcome humidiﬁer internal pressure

GTS-DI model

number

inches mm

100, 200 35 889

300, 400, 500, 600, 700, 800

41 1041

Install level

Air vent tube height must be equal to or greater than dimension “H“ (see table below)

OM-1223

Notes:

• Dashed lines indicate provided by installer.

• Humidiﬁer ﬂue gases must be vented to the outside atmosphere.

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

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

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

• See the previous page for recommended water supply piping for standard water models.

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Page 24

S u p p l y w a t e r a n d d r a i n o v e r f l o w c o n n e c t i o n s

Supply water and drain overflow connections

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

• Make union connections at the humidifier on the make-up water supply and drain/overflow lines.

• Provide a shutoff valve in the supply water line to isolate the humidifier 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 humidifier tank to accommodate skim and/or overflow 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 fittings, such as galvanized steel. These insulating fittings 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 humidifier at a new installation, make sure the humidifier tank is full of water and the water is free to flow into the tank.

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

Table 22-1: Connection sizes

GTS-100

Description

Gas supply

Sealed combustion piping (optional)

Flue vent 5 125 7 180 8 200 10 250

Water supply to ﬁll valve and tempering device*

Drain

Steam outlet

Condensate return (recommended)

Notes:

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

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

(pipe thread)

(pipe thread or

(pipe thread)

GTS-200

inches DN inches DN inches DN inches DN

4 100 4 100 4 100 4 100

3/8

1½

hose)

(pipe thread)

3/8

1½

(ﬂange)

GTS-300 GTS-400

GTS-500 GTS-600

(pipe thread)

3/8

(pipe thread)

1½

(pipe thread)

(ﬂange)

(pipe thread)

100

(pipe thread)

1¼

3/8

1½

(ﬂange)

GTS-700 GTS-800

100

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Page 25

Wa t e r s u p p l y p i p i n g

Water supply piping general instructions

The GTS humidifier has a 1" (25 mm) internal air gap to prevent back siphoning into a potable water system. However, some governing codes may require additional protection such as a vacuum breaker or backflow preventer.

The supply water pressure range must be 25 psi to 80 psi (172 kPa to 552 kPa). When nonmetallic water piping is used, it must be rated to withstand 212 °F (100 °C) or greater temperature. If not, the final three feet of piping connected to the humidifier should be metallic and should not be insulated.

GTS (standard water) water supply piping

The water supply assembly has a 3/8" pipe thread (DN10) connection. Since the primary component of the water supply assembly is a solenoid valve, there may be noise issues that surface during a fill cycle.

During a fill cycle, the supply water drops the water temperature in the tank and may collapse the steam, which can cause a low rolling sound. To diminish this, adjust the factory-supplied needle valve (installed prior to the fill valve) to decrease the water fill rate, and/ or use hot supply water.

In cases where water hammer occurs when the fill solenoid closes, a shock arrester is recommended. Reducing the supply water pressure (minimum 25 psi [172 kPa]) or using flexible tubing (rated for 212 °F [100 °C] minimum continuous operating temperature) may diminish the noise, but installing a shock arrester is the best solution.

The minimum water conductivity for the GTS standard water model is 100 µS/cm.

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Page 26

Wa t e r s u p p l y p i p i n g ( c o n t i n u e d )

I m po r t an t : Damage caused by

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

GTS-DI water supply piping

GTS-DI models control water level with a float valve, and have a 3/8" pipe thread (DN10) connection. For DI models with the end-of-season drain option, a solenoid valve is installed prior to the float valve. The end-of-season feature shuts off the fill water supply and drains the tank when there is no demand for humidity for 72 hours. (This length of time is a default setting and is user-adjustable. See the Vapor-logic4 Installation and Operation Manual for more information.)

When using nonmetallic tubing for supply water, it must be rated for 212 °F (100 °C) minimum continuous operating temperature. DRI-STEEM recommends installing a 3' (1 m) piece of noninsulated stainless steel pipe directly off the humidifier prior to connecting to the nonmetallic tubing. When using nonmetallic tubing, DRI-STEEM recommends the installer place a 2" (50 mm) water seal/loop in the supply line to isolate steam during DI/RO water system maintenance. (See Figure 21-1 on page 21.)

DRI-STEEM recommends installing a strainer in the water supply line to prevent clogging of the solenoid valve or float valve orifice. A strainer is highly recommended when the humidifier has the end-of-season drain option. The strainer prevents particulate from collecting at the solenoid valve seat.

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

W A R N I N G !

If the GTS-DI humidiﬁer is supplied with tap water, the ﬂoat valve assembly will become clogged and particulate will accumulate on the low water cutoff switch (ﬂoat switch). This will cause failure of a critical safety circuit and the potential for a dry tank ﬁre. A dry tank ﬁre can cause heat exchanger, vapor hose, and wire insulation failure, severe property damage, severe personal injury, or death.

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Page 27

D r a i n p i p i n g

The drain line piped from the humidifier must be run to an approved sanitary waste or suitable drain. Although the GTS humidifier is equipped with integral water tempering, if nonmetallic drain pipe or hose is used, DRI-STEEM recommends it be rated for 212 °F (100 °C) minimum continuous operating temperature.

Minimum drain pipe size is 1½" (DN40) inside diameter. If the length of the drain piping exceeds 10' (3 m), increase the pipe size.

Do not locate the humidifier directly above a floor drain — skim and drain water dumped into the drain will cause flash steam. This steam will rise and saturate electrical components, adversely affecting component life and performance.

An open drain with a 1" (25 mm) air gap between the drain piping and the drain is required. Locate air gap only in spaces with adequate temperature and air movement to absorb flash steam; otherwise, condensing on nearby surfaces may occur.

Drain piping after the water seal must be pitched a minimum of 1/8"/ft (1%) toward the drain. Governing codes may require more pitch.

If the proximity of a drain requires the humidifier drain and skim water to be lifted, use a water pump with capacity of at least 12 gallons per minute (gpm) or 45.4 litres per minute (L/m). Contact DRI-STEEM to order a drain pump suitable for your installation. A check valve is required on the discharge of the pump (see Figure 25-1). Electrical power for the pump is independent of the humidifier.

The GTS humidifier has an auxiliary 1½" (DN40) drain outlet located below the subpanel. This drain outlet can be hardpiped during installation to enable rapid tank draining before maintenance. This outlet can also provide access for removing scale from the tank bottom.

Figure 25-1: Lifting drain water

Discharge piping, by

Inlet drain water piping, by installer

installer

Check valve

Integral water tempering chamber

Governing codes may require that the 212 °F (100 °C) drain and skim/overflow water from the humidifier be tempered before it is discharged into the building drain piping. The GTS humidifier has an integral water tempering chamber that tempers 6 gpm (22.7 L/m) of 212 °F (100 °C) water to 140 °F (60 °C). The water tempering sequence of operation is:

1. Hot water discharged from the humidifier enters the water tempering chamber from either the skim/overflow port or the tank drain.

2. Cold water enters the water tempering chamber through a temperature-actuated valve to mix with the hot discharged water.

3. Tempered water at 140 °F (60 °C) maximum exits through the water tempering chamber side outlet for safe discharge into a municipal sewer system or PVC pipe.

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

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

Table 25-1: Integral water tempering specifications

Water type

Hot water inﬂow

Cold water inﬂow*

Tempered water outﬂow

Maximum

low rate

U.S. gpm

12 45.4 140 60

L/m °F °C

6 22.7 212 100

6 22.7 70 21

Maximum

temperature

Water pump

Note:

Size water pump to handle a minimum of 12 gpm (45.4 L/m).

DRI - STEE M G TS Hu m idif i e r Ins t alla t i on, O p erat i o n, and Main t e nanc e Manu a l • Pag e 2 5

DC-1117

Note:

* Cold water inﬂow pressure must be between 25 psi

and 80 psi (172 kPa and 552 kPa).

Page 28

G a s p i p i n g

C a ut i o n! Supply the humidifier only

with the gas type (natural gas or LP gas) listed on the humidifier name plate or burner failure will result. To convert the humidifier to natural gas or LP gas, contact DRI-STEEM technical support or your

DRI-STEEM representative/distributor.

C a ut i o n! Gas pressure to the

humidifier controls must never exceed 24" wc (6 kPa, 60 mbar) or the gas valve will become damaged and require replacement. Install a 1/8" pipe thread (DN6) plugged tapping, accessible for test gauge connection, immediately upstream of the gas supply connection to the appliance.

I m po r t an t : For North American

models, the recommended supply pressure is 7" wc (1.75 kPa) for natural gas or 11" wc (1.83 kPa) for LP gas.

For European models, the required supply pressure is 20 or 25 mbar for natural gas and 30, 37, or 50 mbar for propane gas.

Gas piping guidelines

• After threading and reaming the ends of the pipes, inspect piping and remove loose dirt and chips.

• Support piping so there are no strains imposed on unit or controls.

• Use two wrenches when connecting piping to unit or controls.

• Provide a drip pocket before each unit and in the line where low spots cannot be avoided.

• Takeoff to unit should come from top or side of main to avoid trapping condensate.

• Piping that is subject to wide temperature variations should be insulated.

• Pitch piping up toward unit at least ¼" (6 mm) per 15' (4.5 m) of horizontal run.

• Compounds used on threaded joints of gas piping must be resistant to the harmful action of liquefied petroleum gases.

W A R N I N G !

Purge air before lighting unit by disconnecting piping at gas control. In no case should line be purged into heat exchanger. Failure to follow these instructions could cause an explosion or ﬁre resulting in bodily injury, death, or signiﬁcant property damage.

• After installation, check field piping and humidifier gas train for gas leaks.

• Do not use soap solution or open flame on humidifier gas train. A gas leak detector is recommended.

• Install a ground joint union and a manual shutoff valve immediately upstream of the unit. Install a plugged tapping upstream of the shut-off valve, accessible for test gauge connection. Pressure tappings for test gauges are located on all gas valves.

• Allow at least 5' (1.5 m) of piping between any high pressure regulator and unit pipe connection.

• Piping 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/CGS-B149.1,

More gas piping instructions on the next page ▶

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Page 29

G a s p i p i n g ( c o n t i n u e d )

“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 use flexible connectors.

• Piping to units should conform with local and national requirements for type, volume, and gas handled and for pressure drop allowed in the line. Refer to the tables on this page to determine the gas flow in ft3/hr or m3/hr for the type of gas and size of unit to install. Using this value and the length of pipe necessary, determine the pipe diameter. Where several units are served by the same main, the total capacity, gas flow, and length of main must be considered. Avoid pipe sizes smaller than ½" (DN15). Table 27-2 below allows for the usual number of fittings with a 0.3" wc (0.07 kPa) pressure drop.

• When the specific gravity of the gas is other than 0.60 for natural gas or 1.53 for propane, use Table 27-1.

Table 27-2: Gas pipe capacities for gas pressures of 0.5 psig (3.45 kPa) or less

Gas ﬂow in piping in ft3/hr and m3/hr at

pressure drop of 0.3" wc (0.07 kPa)

Length of pipe

Nominal iron pipe diameter in inches (DN)

Speciﬁc gravity = 0.60

Table 27-1: Specific gravity conversion factors

Natural gas

Speciﬁc gravity Factor

0.55 1.04

0.60 1.00

0.65 0.962

Propane gas

Speciﬁc gravity Factor

1.50 0.633

1.53 0.626

1.60 0.612

Note:

Use the above multiplying factor with Table: 27-2 when the speciﬁc gravity of gas is other than 0.60 (natural gas) or 1.53 (propane).

½" (DN15) ¾" (DN20) 1" (DN25) 1¼" (DN32) 1½" (DN40)

ft m ft3/hr m3/hr ft3/hr m3/hr ft3/hr m3/hr ft3/hr m3/hr ft3/hr m3/hr

10 3 132 3.7 278 7.9 520 14.7 1050 29.7 1600 45.3

20 6 92 2.6 190 5.4 350 9.9 730 20.7 1100 31.1

30 9 73 2.1 152 4.3 285 8.1 590 16.7 890 25.2

40 12 63 1.8 130 3.7 245 6.9 500 14.2 760 21.5

50 15 56 1.6 115 3.3 215 6.1 440 12.5 670 19.0

60 18 50 1.4 105 3.0 195 5.5 400 11.3 610 17.3

70 21 46 1.3 96 2.7 180 5.1 370 10.5 560 15.9

80 24 43 1.2 90 2.5 170 4.8 350 9.9 530 15.0

90 27 40 1.1 84 2.4 160 4.5 320 9.1 490 13.9

100 30 38 1.1 79 2.2 150 4.2 305 8.6 460 13.0

See example on page 28.

More gas piping instructions

on the next page ▶

DRI - STEE M G TS Hu m idif i e r Ins t alla t i on, O p erat i o n, and Main t e nanc e Manu a l • Pag e 2 7

Page 30

G a s p i p i n g ( c o n t i n u e d )

Gas leak testing

• When leak-testing the gas supply piping system, disconnect the humidifier and its gas shutoff valve during any pressure in excess of 24" wc (6 kPa). Isolate the humidifier from the gas supply piping system by closing its field-installed manual shutoff valve during any pressure not equal to 24" wc (6 kPa).

• With all burners running, check gas supply pressure at the inlet pressure tap of the combination gas control valve.

For North American models, the

recommended supply pressure is 7" wc (1.75 kPa) for natural gas or 11" wc (1.83 kPa) for LP gas. Perform gas piping purging as described in ANSI Z223.1 (latest edition) or in Canada, CAN/ CGA-B149 codes. The minimum supply pressure is 6" wc (1 kPa) for natural gas or LP gas.

For European models, the required supply

pressure is 20 or 25 mbar for natural gas and 30, 37, or 50 mbar for propane gas.

Example

For this example, refer to the tables on the previous page.

To determine gas piping size, begin by calculating the cubic feet/hour (ft3/hr) or m3/hr using the following formula:

Btuh (kW) input Calorific value of gas

Calorific values are:

• Natural gas: 1025 Btu/ft3 (10.6 kW-hr/m3)

• Propane: 2500 Btu/ft3 (25.9 kW-hr/m3)

For example, if you have a GTS-400 operating on natural gas,

calculate the ft

400,000 Btuh 1025 Btu/ft

117.2 kW

10.6 kW-hr/m3

/hr or m3/hr as follows:

= 390 ft3/hr

= 11.1 m3/hr

If you need to run your gas piping 60 feet (18 m), see Table 27-2 on the previous page and look horizontally across the 60 ft (18 m) row until you locate the next highest value above your calculated ft3/hr or m3/hr. In this example, you are looking for the next highest value above 390 ft3/hr (11.05 m3/hr), which is 400 ft3/hr (11.3 m3/hr) and indicates the use of a 1¼" (DN32) pipe for this application.

Using the same example, if the specific gravity of your natural gas was 0.55 (instead of the 0.60 standard), see Table 27-2 for an adjustment factor. In this case, the factor would be 1.04, which you multiply by the 390 ft3/hr (11.05 m3/hr) value. This gives you a new value of 406 ft3/hr (11.49 m3/hr). Referring again to the gas pipe capacities table (Table 27-2), you see that for the same 60 ft (18 m) length, you now need to use 1½" (DN40) pipe due to the change in the specific gravity of the gas.

More gas piping instructions on the next page ▶

Pag e 2 8 • DR I - STE E M GTS H u m idif i er In s t alla t ion, O p era t i on, a n d Main t enan c e Manu a l

Page 31

G a s p i p i n g ( c o n t i n u e d )

Figure 29-1: GTS gas piping

GTS or GTS-DI models 100, 200

½” pipe thread (DN15) piping

Plugged test gauge connection

Gas cock

3” (76 mm) min.

GTS or GTS-DI models 300-800

Gas manifold (by DRI-STEEM)

Drip pocket

OM-1236

See Table 22-1 for pipe size by model

Plugged test gauge connection

Gas cock

3” (76 mm) min.

Note:

Dashed lines indicate supplied by installer

DRI - STEE M G TS Hu m idif i e r Ins t alla t i on, O p erat i o n, and Main t e nanc e Manu a l • Pag e 2 9

Drip pocket

OM-1235

Page 32

C o m b u s t i o n a n d v e n t i l a t i o n a i r

W A R N I N G !

Air for combustion must not be contaminated by halogen compounds, which include ﬂuoride, chloride, bromide, and iodide. These elements are found in aerosol sprays, detergents, bleaches, cleaning solvents, salts, air fresheners, and other household products.

When the GTS is located in an environment with negative pressure or toxic air, it must have sealed combustion.

Failure to follow these instructions could cause severe bodily injury or death.

Combustion and ventilation air

The GTS supports both room air and sealed combustion. Requirements and recommendations for each follow.

Room air combustion

• All fuel burning equipment must be supplied with air for combustion of the fuel. Sufficient air must be provided to ensure there is not a negative pressure in the equipment room or space.

• Provide adequate combustion and ventilation air in accordance with Section 5.3, Air for Combustion and Ventilation, of the National Fuel Gas Code, ANSI Z223.1 or applicable provisions of governing codes. Canadian installations must be installed in accordance with sections 7.2, 7.3, and 7.4 of the CAN/CGA.B149 Installation Codes and all authorities having jurisdiction.

• For proper and safe operation this appliance needs air for combustion and ventilation. Do not block or obstruct air openings on the appliance, spaces around the appliance, or air openings communicating with the appliance area.

• Do not locate in a dusty environment.

• Do not block the flow of combustion and ventilation air. To provide for necessary oxygen for proper combustion, openings must be provided to allow outside air to enter the space where the humidifier is located. Enclosed spaces, such as equipment rooms, must be vented for combustion air. The size of air openings must be based on all gas-burning equipment installed in the space involved. Table 30-1 outlines four types of locations, and the requirements of each.

Sealed combustion

Table 30-1: Location of humidifier and required air openings

Location description Required air opening

Conﬁned space with all air from inside the building; conventional frame, brick or stone construction with normal inﬁltration (Note: this location rarely provides enough air for higher capacity units.)

Conﬁned space with all air from outside the building through air ducts

Conﬁned space with all air from outside the building from through-wall openings only (no ducts)

Unconﬁned space with all air from outside the building

Note:

* The minimum dimension of any opening is 3" × 3" (76 mm × 76 mm).

Pag e 3 0 • DR I - STE E M GTS H u m idif i er In s t alla t ion, O p era t i on, a n d Main t enan c e Manu a l

More instructions on the next page ▶

Two openings, 1 sq. in. (6.5 cm2) per opening per 1000 Btu/hr (293 W) input

The minimum free area of all openings combined is 100 sq. in. (645 cm2).

Two openings, 2 ducts, 1 sq. in. (6.5 cm2) per opening per 2000 Btu/hr (586 W) input*

Two openings, 1 sq. in. (6.5 cm2) per opening per 4000 Btu/hr (1172 W) input*

Same as conﬁned space; all air from outside the building

Page 33

C o m b u s t i o n a n d v e n t i l a t i o n a i r ( c o n t i n u e d )

The GTS supports sealed combustion using 4" (DN100) PVC or CPVC piping (see Figure 31-1). All GTS models have a single point connection to the blower below the humidifier shroud.

When running PVC or CPVC piping for sealed combustion, the maximum allowable distance to the outdoor air source is 70' (21.3 m) including 7' (2.1 m) equivalent length for each elbow. The outside air source can be either a final connection outside the building or a connection to an outdoor air plenum within the building. When the combustion air origination point is outside the building, the opening must be covered with a large mesh screen to prevent the introduction of unwanted materials without restricting airflow.

If sealed combustion piping is less than 20 ft (6 m), we recommend insulating piping to prevent condensation.

Figure 31-1: GTS optional sealed combustion connection

W A R N I N G !

When installing sealed combustion piping for more than one GTS humidiﬁer, do not commonly manifold multiple sealed combustion piping runs without having the manifold sized for the speciﬁc installation by a licensed engineer. Failure to follow these instructions could starve the GTS humidiﬁer of combustion air resulting in either the unit not being able to light or high carbon monoxide (CO) levels, which may cause severe personal injury or death.

DRI - STEE M G TS Hu m idif i e r Ins t alla t i on, O p erat i o n, and Main t e nanc e Manu a l • Pag e 3 1

4" dia. (DN100) PVC or CPVC combustion air intake

OM-1225

Page 34

W A R N I N G !

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

Note:

For European models, contact your distributor for horizontal venting parts.

Ve r t i c a l a n d h o r i z o n t a l v e n t i n g

Vertical and horizontal venting guidelines (stack connection)

• The GTS is a Fan Assisted Category I (natural draft) Appliance. Installations where the vent terminates in a side wall of the building, or where the overall horizontal run exceeds the overall vertical run require a power venter. See Page 34.

• Maximum flue temperature is 400 °F (205 °C) + ambient.

• Flue draft negative pressure greater than 0.2" wc (50 Pa) may cause unacceptable post ignition.

• Vent piping must be UL or UL/CSA listed type B, B-W, or any other vent type approved for a Category I appliance.

– Type B: Double wall construction, inner wall aluminum, outer

wall galvanized steel – Type B-W: Same as type B except fabrication in oval shapes only Do not use more than one type of venting per application Required

clearance for Type B and B-W vent piping is 1" (25 mm).

• Do not use vent equipment from more than one manufacturer.

• When connecting the humidifier to a gas vent or chimney,

installation must be in accordance with Part 7, Venting of Equipment, of the National Fuel Gas Code, ANSI Z223.1; or Section 7, Venting Systems and Air Supply Appliances, of the CAN/CGA B149 Installation Codes; or National Gas Safety Code (Installation & Use) Regulations (latest revision); governing codes, and the vent manufacturer’s instructions.

• When applying the codes, reference also the venting

manufacturer's instructions, the service gas supplier's regulations, and the specific instructions provided in this manual.

C A UT I O N! Install a drip tee or flue box condensate drain for startup flue condensate removal. Failure to follow these instructions could cause water to accumulate in the flue box.

• The purpose of venting the gas humidifier is to completely remove

all products of combustion and ventilation gases to the outside air.

• For vertical vent pipe terminations only: Do not reduce the vent

diameter and avoid short turns in the vent piping. Use the same size stack as the vent furnished with the humidifier. Maintain a minimum upward slope of ¼" per linear foot (2%) on all horizontal runs. Maintain proper support of vent connections and joints. Observe clearances (in accordance with applicable codes) from all combustible materials and install an approved cap for the stack outlet. The bottom of the cap must be one stack diameter above the top of the stack.

• Inspect for proper and tight construction. Remove any restrictions

or obstructions. An existing chimney may require cleaning.

• For vertical vent pipe terminations only: Extend chimney or vent at

least 3' (1 m) above its passage through a roof and at least 2' (0.6 m) above any ridge within 10' (3 m) of the chimney (governing codes apply).

• Do not connect this humidifier to a chimney flue servicing a

separate appliance designed to burn solid fuel.

Pag e 3 2 • DR I - STE E M GTS H u m idif i er In s t alla t ion, O p era t i on, a n d Main t enan c e Manu a l

More instructions on the next page ▶

Page 35

Ve r t i c a l a n d h o r i z o n t a l v e n t i n g ( c o n t i n u e d )

• Never connect this humidifier to a chimney serving a fireplace, unless the fireplace opening is permanently sealed off.

• Code prohibits venting into an unlined masonry or concrete chimney.

• If this humidifier is connected to a lined, masonry chimney, the chimney must be sized and installed according to the provisions of the National Fuel Gas Code or Canadian CAN/CGA.B149 requirements, or governing codes.

• Vent connector serving this appliance shall not be connected into any portion of mechanical draft systems operating under positive pressure.

• Add insulation to any roof or wall penetration vent connector that is exposed to ambient temperatures of 30 °F (0 °C) or less, especially any application using single-wall vent pipe as a connector.

• Do not insulate vent pipe exposed to outdoor weather conditions (e.g., above roof lines).

• Install vent piping as direct as possible, with a minimum number of turns or elbows.

• Rigidly support the vent pipe every 5' (1.5 m) or less with hangers or straps to ensure there is no movement after installation. The humidifier vent box should not support the weight of the vent piping.

• No portion of the vent system should extend into, or pass through, any circulation air duct or plenum.

• The vent system must terminate above the roof surface per the National Fuel Gas Code, CAN/CGA.B149, or National Gas Safety Code (Installation & Use) Regulations (latest revision) requirements or governing codes, and must include a UL or UL/CSA listed vent cap or roof assembly, unless prohibited by governing codes.

• For vertical vent pipe terminations only: This humidifier may be commonly vented with other listed Category I gas-fired appliances. Total input rates of all appliances determines the vent size.

• Install and fire-stop all vent pipe passing through floors, ceilings, and walls with the proper clearances from combustible material according to the National Fuel Gas Code, Canadian Standards CAN/CGA.B149, the National Gas Safety Code (Installation & Use) Regulations (latest revision), or governing codes.

• In replacement installation where an existing vent system may be used, inspect the vent system for condition, size, type of vent material, and height to meet the requirements in these instructions. When connecting the humidifier to a gas vent or chimney, the installation must be in accordance with Part 7, Venting of Equipment, of the National Fuel Gas Code, ANSI Z223.1; Section 7, Venting Systems and Air Supply Appliances, of the CAN/CGA B149 Installation Codes; The National Gas Safety Code (Installation & Use) Regulations (latest revision), governing building codes, and the vent manufacturer’s instructions.

W A R N I N G !

For applications where the vent pipe terminates in a vertical position, the horizontal length of the vent and vent connector must not exceed the height of the vent system unless a power venter is used. Failure to follow these instructions could cause ﬂue gases to exit the vent piping causing severe personal injury or death.

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Page 36

Ve r t i c a l a n d h o r i z o n t a l v e n t i n g ( c o n t i n u e d )

Table 34-1: Equipment required for horizontal venting

Field controls

model number

Item

Power venter PVO-600 (5") PVE-1200 (8")

Barometric damper

Vent hood SWH-1-5 (5") SWH-8

Electrical ratings

Note:

For European models, contact your distributor for horizontal venting parts.

for GTS or

GTS-DI models

100, 200,

300, 400

MG-1 (5") MG-1 (8")

120 VAC

60 Hz

2.1 A

Field controls

model number

for GTS or

GTS-DI models

500, 600, 700,

and 800

120 VAC

60 Hz

2.5 A

Table 34-2: Recommended minimum vent sizes

Minimum vent size

Model

Vertical vent Horizontal vent

Special horizontal venting requirements

• Ensure that distances from the vent terminal to adjacent public walkways, buildings, and openable windows and building openings are consistent with the National Fuel Gas Code, ANSI Z223.1, CAN/CGA B149 Installation Codes, National Gas Safety Code (Installation & Use) Regulations (latest revision), or governing codes.

• In areas accessible to the public, the vent terminal must be at least 7' (2.1 m) above ground level to prevent burns from the hot terminal surface.

• The vent terminal and air intake locations must be at sufficient height above ground level to prevent blocking by expected snowfall.

• Building materials must be protected from degradation by flue gases.

• A minimum horizontal clearance of 4' (1.22 m) from electric meters, gas meters, regulators, and relief equipment must be maintained.

• Maximum equivalent length of vent pipe is 100' (30 m). Minimum equivalent length of vent pipe is 10' (3 m). See power venter installation manual for equivalent lengths of fittings.

• Vent box pressure must be –0.01" wc (–2.5 Pa). Set by adjusting power venter and barometric damper, with all burners running (see manufacturer's instructions included with power venter and damper).

inches mm inches mm

GTS-100 5 130 5 130

GTS-200 5 130 5 130

GTS-300 7 180 5* 130

GTS-400 7 180 5* 130

GTS-500 8 205 8 205

GTS-600 8 205 8 205

GTS-700 10 255 8* 205

GTS-800 10 255 8* 205

Note:

* For best results, make transition to smaller vent

diameter as close to the power venter as possible.

Figure 34-1: GTS venting

I m po rt a nt : Seal the connection and all other vent piping joints on the pressure side of the power venter.

Vent hood

Distance**

Air intake

3½' (1.07 m) min.

Air intake

Notes:

* Install a tee after the ﬁrst elbow from the humidiﬁer as shown. Use the open end of

this tee for the location of the barometric damper. ** Required distance between air intake and vent hood is deﬁned by governing codes. Refer to power venter manual for clearance requirements relative to combustion air openings.

Power venter

“x”

Recommended value for “x” approximately 12" (305 mm)

Barometric draft control installed in tee*

OM-1209

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Page 37

D i s p e r s i o n : G e n e r a l i n s t r u c t i o n s

Selecting the dispersion assembly location

• For each dispersion device, DRI-STEEM documents distances required for absorption to occur. If you have questions about absorption distances, see the absorption tables in the U.S. English version of the GTS catalog, available for viewing, printing, or ordering at www.dristeem.com

• It is important that the dispersion assembly is positioned where the water vapor being discharged is carried off with the airstream and is absorbed before it can cause condensation or dripping in the duct.

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

• Place the dispersion assembly so that absorption occurs before the intake of a high efficiency filter. The filter can remove the visible moisture and become waterlogged.

• Place the dispersion assembly so absorption occurs before coming in contact with any metal surface.

• Place the dispersion assembly so absorption occurs before fire or smoke detection devices.

• Place the dispersion assembly so absorption occurs before a split in the duct. Otherwise, the dispersion assembly may direct more moisture into one duct than the other.

• When draining dispersion condensate to an open drain, provide a 1" (25 mm) gap between the condensate drain piping and the drain. Locate air gap only in spaces with adequate temperature and air movement to absorb flash steam; otherwise, condensing on nearby surfaces may occur.

Where to find more information

On our Web site:

The following documents can be viewed, printed or ordered from our web site,

www.dristeem.com

• Catalogs (include dispersion nonwetting distance graphs):

– GTS – Ultra-sorb

• Installation, Operation and Maintenance manuals:

– Ultra-sorb – Vapor-logic4 (includes sensor placement recommendations and troubleshooting information)

•

DRI-STEEM Design Guide

loss tables and general humidification information)

In Dri-calc:

Dri-calc is our humidification system sizing and selection software, which can be ordered at www.dristeem.com.

Included in Dri-calc:

• A comprehensive library of installation guide documents, including:

– Rapid-sorb installation instructions for vertical airflows – Recommended dispersion placement within a duct or air handler – Recommended sensor placement

(includes steam

DRI - STEE M G TS Hu m idif i e r Ins t alla t i on, O p erat i o n, and Main t e nanc e Manu a l • Pag e 3 5

Or call us at 800-328-4447

While obtaining documents from our Web site or from Dri-calc is the quickest way to review our literature, we will also mail to you any literature you need.

Page 38

D i s p e r s i o n : I n t e r c o n n e c t i n g p i p i n g r e q u i r e m e n t s

W A R N I N G !

The evaporating chamber is designed as a non-pressurized vessel. DO NOT restrict piping where steam exits the humidiﬁer. DO NOT install a shut-off valve on the piping connecting the evaporating chamber to the steam outlet.

C A UT I O N!

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

Connecting humidifier to dispersion assembly with vapor hose

• Always support vapor hose to prevent sags or low spots and to maintain a minimum pitch of 2"/ft (15%) back to the humidifier.

• See the maximum steam carrying capacity table on the next page.

• Use DRI-STEEM vapor hose. Other manufacturers of vapor hose may use unacceptable release agents or material mixes that can affect humidifier system performance adversely. Using hose from alternative manufacturers increases the possibility of tank foaming and accelerated aging. Foaming causes condensate discharge at the dispersion assembly.

• Do not use vapor hose in outdoor applications.

• Do not insulate vapor hose. Insulation causes accelerated heat aging, causing the vapor hose to become hard and susceptible to failure due to cracks.

• The steam outlet on the humidifier is sized to the output of the humidifier. DO NOT use hose with an inside diameter (ID) smaller than the humidifier steam outlet.

• If the humidifier must be located above the dispersion assembly, use the recommended installation as shown on Page 38.

• For single tube applications, see the hose kit sizing table on Page 39.

Connecting humidifier to dispersion assembly with tubing or pipe

• See the table on Page 40 for interconnecting tubing and pipe pitch requirements for single tube and multiple tube applications. See the table on Page 45 for interconnecting tubing and pipe pitch requirements for Rapid-sorb applications.

• The steam outlet on the humidifier is sized to the output of the humidifier. DO NOT use interconnecting tubing or pipe with an inside diameter (ID) smaller than the humidifier steam outlet.

C A UT I ON ! Reducing the inside diameter of the

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

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

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

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

More on next page ▶

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Page 49

D i s p e r s i o n : R a p i d - s o r b ( c o n t i n u e d )

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

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

• For 1½" (DN40) dispersion tubes:

– The dispersion tube will rotate in the slip

coupling. Verify that the dispersion tube orifices are directed perpendicular to the airflow.

– The dispersion tube and slip coupling must be fully

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

• For 2" (DN50) dispersion tubes:

– 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.

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

• For 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.

• For 2" (DN50) dispersion tubes:

– Fasten the bracket to the top of the duct 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 header pitch, 1/8"/ft (1%) toward drain, is maintained.

Note:

See Page 46 for steam supply and condensate drain line connection instructions.

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

8. Verify that all fasteners are secure:

• L-bracket to duct

• Dispersion tubes to L-bracket

• Hose clamps on 2" (DN50) tubes

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

DRI - STEE M G TS Hu m idif i e r Ins t alla t i on, O p erat i o n, and Main t e nanc e Manu a l • Pag e 4 7

Page 50

D i s p e r s i o n : R a p i d - s o r b ( c o n t i n u e d )

Figure 48-1: Rapid-sorb installed in a horizontal airflow with header inside the duct

Position L-bracket so that ﬂange is upstream of dispersion tubes. This drawing shows the L-bracket positioned for airﬂow back to front

Dispersion tube

Point tubelets (steam oriﬁces) perpendicular to airﬂow

90° long sweep or two 45° elbows

Vapor hose, tubing, or pipe

Note:

* Pitch vapor hose, tubing,

or pipe toward Rapid-sorb: – 2"/ft (15%) when using vapor hose – 1/8"/ft (1%) when using tubing or pipe

Slip coupling or hose cuff

Pitch*

Secure and seal escutcheon plate

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

GTS humidiﬁer

Stainless Steel Support by DRI-STEEM

Airﬂow

Duct

¾" pipe thread

(DN20) drain

¾" (DN20) copper

1" (25 mm) air gap

5" (127 mm)

6" (152 mm)

Support bracket

OM-1213

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

1. Locate and cut the holes in ductwork or air handler for steam header penetration, condensate drain piping, and header support bracket fastener. Allow 1/8"/ft (1%) header pitch toward the support bracket when you drill the hole for the header support bracket fastener.

2. Loosely fasten the header in place.

3. Rotate the header 90° so the header stubs point horizontally in the duct.

• When installing in an air handler, the rotation of the header

is often less than 90°. Typically, due to the condensate drain piping requirements, the header can be set on the floor of the air handler, assembled in the vertical position, and then raised and mounted in place.

4. Mount the dispersion tubes on the header with the slip couplings or hose cuffs.

• When installing slip couplings for 1½" (DN40) dispersion

tubes, take care not to shear the O-rings.

• Set the slip coupling on the header stub or dispersion tube so

the O-ring is resting on the face of the tubing.

More on next page ▶

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Page 51

D i s p e r s i o n : R a p i d - s o r b ( c o n t i n u e d )

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.

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.

10. See page 48 for steam supply and condensate drain line

connection instructions.

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Page 52

D i s p e r s i o n : R a p i d - s o r b ( c o n t i n u e d )

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 tanks 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.

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Page 53

D i s p e r s i o n : A r e a - t y p e f a n

Area-type™ fan dispersion

The table on the following page lists the Area-type steam minimum rise, spread, and throw nonwetting dimensions. Surfaces or objects located within this minimum dimension can cause condensation and dripping.

• Rise: The minimum nonwetting height above the steam chute

• Spread: The minimum nonwetting width from the steam chute

• Throw: The minimum nonwetting horizontal distance from the steam chute

The greater the space relative humidity, the higher and farther the discharged steam will carry and rise in the space until becoming absorbed.

The Area-type fan, brackets, and wiring are factory installed on the humidifier.

Table 51-1: Area-type electric fan specifications

Motor 120 V, 50/60 Hz

Blade diameter 18" (457 mm)

Speeds 3

Control Rotary switch

cfm (high speed) 5350

m3/s (high speed) 2.52

rpm (high speed) 1500

Amps (high speed) 1.52

Note:

For European models, contact your distributor for Area-type parts.

Figure 51-1: Area-type rise, spread, throw

OM-1230

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Page 54

D i s p e r s i o n : A r e a - t y p e f a n ( c o n t i n u e d )

Table 52-1: Area-type (evaporative steam) minimum non-wetting distances*

60 °F (16 °C)

Maximum

steam capacity

Rise Spread Throw Rise Spread Throw Rise Spread Throw

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

50 20 1.0 0.3 2.0 0.6 6.0 1.8 1.0 0.3 2.0 0.6 6.0 1.8 1.0 0.3 2.5 0.8 6.0 1.8

75 34 3.0 0.9 3.0 0.9 8.0 2.4 3.0 0.9 3.0 0.9 8.0 2.4 3.0 0.9 4.0 1.2 8.0 2.4

100 45 4.0 1.2 4.0 1.2 10.0 3.1 4.0 1.2 4.0 1.2 10.0 3.1 4.0 1.2 5.0 1.5 10.0 3.1

150 68 6.0 1.8 5.0 1.5 12.0 3.7 6.0 1.8 5.0 1.5 12.0 3.7 6.0 1.8 5.0 1.5 12.0 3.7

200 90 7.0 2.1 7.0 2.1 13.0 4.0 8.0 2.4 7.0 2.1 14.0 4.3 8.0 2.4 7.0 2.1 14.0 4.3

225 102 7.0 2.1 7.0 2.1 13.0 4.0 8.0 2.4 7.0 2.1 14.0 4.3 8.0 2.4 7.0 2.1 14.0 4.3

250 110 8.0 2.4 8.0 2.4 15.0 4.6 9.0 2.7 9.0 2.7 16.0 4.9 9.0 2.7 9.0 2.7 16.0 4.9

30% RH 40% RH 50% RH

285 130 9.0 2.7 9.0 2.7 17.0 5.2 10.0 3.1 10.0 3.1 18.0 5.5 10.0 3.1 10.0 3.1 18.0 5.5

300 136 9.0 2.7 9.0 2.7 17.0 5.2 10.0 3.1 10.0 3.1 18.0 5.5 10.0 3.1 10.0 3.1 18.0 5.5

70 °F (21 °C)

Maximum

steam capacity

Rise Spread Throw Rise Spread Throw Rise Spread Throw

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

50 20 1.0 0.3 1.5 0.5 4.0 1.2 1.0 0.3 2.0 0.6 4.0 1.2 1.0 0.3 2.0 0.6 4.0 1.2

75 34 2.0 0.6 2.0 0.6 6.0 1.8 2.0 0.6 2.5 0.8 6.0 1.8 2.0 0.6 2.5 0.8 6.0 1.8

100 45 3.0 0.9 3.0 0.9 8.0 2.4 3.0 0.9 3.0 0.9 8.0 2.4 3.0 0.9 3.0 0.9 8.0 2.4

150 68 4.0 1.2 4.0 1.2 10.0 3.1 4.0 1.2 4.0 1.2 11.0 3.4 4.0 1.2 4.0 1.2 11.0 3.4

200 90 5.0 1.5 5.0 1.5 11.0 3.4 5.0 1.5 5.0 1.5 12.0 3.7 5.0 1.5 5.0 1.5 12.0 3.7

225 102 5.0 1.5 5.0 1.5 11.0 3.4 5.0 1.5 5.0 1.5 12.0 3.7 5.0 1.5 5.0 1.5 12.0 3.7

250 110 6.0 1.8 6.0 1.8 12.0 3.7 6.0 1.8 6.0 1.8 13.0 4.0 6.0 1.8 6.0 1.8 14.0 4.3

285 130 7.0 2.1 7.0 2.1 14.0 4.3 7.0 2.1 7.0 2.1 15.0 4.6 7.0 2.1 7.0 2.1 16.0 4.9

300 136 7.0 2.1 7.0 2.1 14.0 4.3 7.0 2.1 7.0 2.1 15.0 4.6 7.0 2.1 7.0 2.1 16.0 4.9

30% RH 40% RH 50% RH

Notes:

* With fan on high speed Rise: Minimum non-wetting height above the steam chute Spread: Minimum non-wetting width from the steam chute Throw: Minimum non-wetting horizontal distance from the steam chute

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Page 55

S t a r t - u p p r o c e d u r e

After the system is installed and connected to gas, electrical, water supplies, and controls, you can begin start-up procedures.

1. Verify that the GTS humidifier, controls, piping, electrical connections, steam supply, and dispersion unit(s) are installed according to the following:

• Installation instructions in this manual

• Vapor-logic4 Installation and Operation Manual – Installation section – Installation checklist

• Ladder style wiring diagram (shipped inside unit)

• External connections wiring diagram (shipped inside unit)

• Gas connection instructions in this manual

• Mounting instructions in this manual

• All governing codes

2. Piping (gas)—Verify that all field and humidifier gas piping has been tested for leaks. (Soap and water are not recommended near gas valves.)

Piping (steam, drain, water supply)—Verify that all piping

connections have been completed as recommended and that water pressure is available.

3. Electrical—Verify that all wiring connections have been made in accordance with all governing codes and the GTS wiring diagrams.

4. Controls—Before proceeding with start-up and operation, verify that all control wiring has been completed as specified and required for correct and safe operation of the GTS humidifier. Refer to the Vapor-logic4 manual that was enclosed with the product shipment.

W A R N I N G !

Only qualiﬁed electrical and gas personnel should perform the start-up procedure.

Note:

The

Vapor-logic4 Installation and Operation

Manual

manual. Refer to it for information regarding the following features:

• Keypad display setup and menu

• Control input signals and functions

• Drain, flush, and skim features

• Safety features

• Alarm screens and fault messages

The Vapor-logic4 manual was shipped with your humidifier. Additional copies can be viewed, printed, or ordered at www.dristeem.com

is a comprehensive operation

information

DRI - STEE M G TS Hu m idif i e r Ins t alla t i on, O p erat i o n, and Main t e nanc e Manu a l • Pag e 5 3

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Page 61

M a i n t e n a n c e : b o t h G T S an d G T S - D I m o d e l s ( c o n t i n u e d )

• Remove loose deposits and residue that falls into rear header with a vacuum cleaner and hose extension.

• Inspect 1½" (DN40) return tubes and clean if necessary.

• Run thin brush between turbulator and tube wall on all four sides.

• Reinstall burner assemblies and gaskets; vent box and gasket; all electrical wiring; gas train shroud; and pressure switch connections.

Burner maintenance

Under normal use conditions, the burner(s) should not need cleaning for a minimum of five years. However, depending on the operating environment, the burner(s) may require periodic cleaning to remove accumulated materials. Failure to clean burners can result in reduced unit capacity. Use sealed combustion in dirty environments. See burner maintenance instructions below.

Burner maintenance instructions

To service the burner system, clean both the blower and the burner. Remove the blower(s) from the system and clean dust from the wheel. Remove the burner(s) for cleaning. Removing and cleaning one burner at a time eases reassembly. To dislodge particulate matter from the burner surface matrix, use compressed air (100 psig [700 kPa] maximum). Keep the air nozzle about 2" (50 mm) from the burner’s surface, blowing air perpendicular to the burner surface while moving the nozzle back and forth lengthwise. This dislodges particles trapped in the matrix, pushing them back inside the burner. Avoid blowing air across the surface, which tends to have a destructive effect on the burner surface. Allow particulate matter to fall from the burner through the air/gas inlet. To assist in removing the particulate matter, use a vacuum at the burner’s air/gas inlet.

Note:

Soot and carbon deposits may indicate a combustion problem that needs to be corrected. Consult the factory.

W A R N I N G !

When cleaning burners with compressed air, wear appropriate respiratory protection. Failure to do so may cause severe bodily injury.

Replacement parts

When servicing or repairing this equipment, use only DRI-STEEM approved service replacement parts. Complete replacement part lists are on Pages 68–77. Refer to the rating plate on the unit for complete unit model number, serial number, and company address. Any substitution of parts or controls not approved by DRI-STEEM will be at owner’s risk and will void the warranty.

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Page 62

M a i n t e n a n c e : G T S s t a n d a r d w a t e r m o d e l s

GTS standard water quality recommendations

The best way to determine how often your particular system needs maintenance is to remove the probe plate and inspect it for mineral deposits after three months of duty. Potable water carries a variety of minerals and other materials in a mix that varies from location to location. This variation in water quality, combined with the hours of operation and duty cycle, will determine your own unique maintenance schedule.

Water quality makes a difference

• Light to moderately hard water (2 to 10 grains hardness per gallon [35 mg/L to 170 mg/L]) requires:

– Annual cleaning – Regular skimming

• High mineral content water (more than 10 grains hardness per gallon [more than 170 mg/L]) requires:

– Cleaning frequency determined by use and water quality – Regular skimming – Periodic drain and flush cycles

• Softened water dramatically reduces mineral accumulation inside standard water models.

(Note: Solids, like silica, are not removed in the softening

process.)

Adjusting skim duration

The skim time duration determines the quantity of water skimmed with each fill cycle. Skim time is field adjustable using the Vapor-logic4 keypad.

Each time the GTS refills, it fills to an elevation near the lip of the skim/overflow fitting. A portion of the refill water then flows to the drain carrying most of the minerals left by the previous evaporating cycle. This reduces the mineral concentration, thereby reducing the frequency of cleaning needed.

The heated water that flows to the drain is an operational cost. Cleaning the humidifier also is an operational cost. Therefore, DRISTEEM recommends that the user observe and adjust the skimming quantity to achieve a balance between minimizing mineral buildup and conserving heated water.

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Page 63

M a i n t e n a n c e : G T S s t a n d a r d w a t e r m o d e l s ( c o n t i n u e d )

Cool down humidifier before beginning maintenance

Before performing any maintenance, allow the tank to cool down.

• Insulated and uninsulated tanks will have hot surfaces.

• Verify that there is no call for humidity and that the aquastat set point (adjusted using the keypad/display Set Up screens) is less than room temperature (default setting is 40 °F [4 °C]) so that the heaters do not energize while cooling down the tank.

• For models with a standard drain valve:

– Manually open the drain valve by moving the valve lever

located on the back of the drain valve to the manual open

position. – The fill valve eventually opens. – Let the fill water run until the tank is cooled; then shut off the

field-installed manual supply water shut-off valve. – Let the tank drain; then manually close the drain valve.

• For models with optional drain valves: – For drain valves without the manual open lever, use the keypad

to perform the cool down process. – Go to the Home screen and change mode to Drain. – Allow approximately half the water to drain out of the tank. – Go to the Home screen and change mode to Auto; the fill valve

opens and the humidifier cools down. – When the fill valve closes, select Manual Drain in the Control

Modes screen and let the tank drain dry. The humidifier should

be cool enough to work on. – For more information about using the Vapor-logic4 keypad

or web browser interface, see the Vapor-logic4 Installation and

Operation Manual.

W A R N I N G !

When performing maintenance on the GTS humidiﬁer, always change the control mode to Standby, place all power disconnects in OFF position and lock in OFF position, close the ﬁeld installed manual water supply and gas shut-off valves. Failure to follow these instructions may cause severe bodily injury or death from electric shock.

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Page 64

M a i n t e n a n c e : G T S s t a n d a r d w a t e r m o d e l s ( c o n t i n u e d )

Inspection and maintenance

1. Annually (also recommended when maintenance is performed)

• Inspect tank, piping, and gaskets for water and gas leaks.

• All safety devices in the control circuit should be cycled on and off to verify they are functioning. These include:

– High limit switch – Airflow proving switch – Low water level probe. Pull out probe plugs; valve should

de-energize.

2. Seasonally (or as required, depending on water quality)

• Clean tank

– Remove cleanout plate and dispose of any loose scale that

has collected in the tank. Do this before the scale buildup reaches the bottom of the heat exchanger.

– Inspect the area inside the tank in front of the drain valve

fitting and thoroughly clean all scale and mineral buildup from that area.

• Dismantle and clean drain valve and associated piping

• Clean the probes

– Access the probe assembly either from the electrical panel

or by removing the roof panel above the electrical area.

– Disconnect the probe plug and cable assembly and unscrew

the probe rod assembly from the humidifier probe housing.

– Inspect the probe housing and clean, ensuring that all the

housing passageways are clear. Remove the housing from the tank by removing the cover plate from the tank.

– The scale should flake off easily from the probe assembly

rods.

– The bottom 3/8" (10 mm) of each rod is the sensing

portion; clean these areas with a wire brush, abrasive pad, or steel wool.

– Inspect the composite plastic probe rod assembly for any

signs of cracking, roughness, or deterioration. If found, replace probe assembly.

– Reassemble the probe assembly.

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M a i n t e n a n c e : G T S s t a n d a r d w a t e r m o d e l s ( c o n t i n u e d )

Inspection and maintenance (continued)

• Clean the skim/overflow port – Water should drain from the skimmer drain pipe after

each fill cycle. This should be verified visually by a weekly inspection.

– Loosen deposits in and around the skimmer/overflow port

with a long tool such as a screwdriver.

– If flow through the water seal/P-trap is diminished due to

mineral accumulation:

• Remove the water seal piping from the humidifier and flush out.

• Replace the water seal with new piping if the minerals have hardened in the water seal.

• Clean low water cutout probe — Remove the shroud cover and inspect the probe rod for mineral accumulation. The rod is located on the top of the tank near the back. Use stainless steel wool to clean the probe .

• Inspect blower motor — A lubrication port is not provided, therefore lubrication is not required.

• Remove dust — Using a vacuum, remove all dust from areas around the motor, vent fan(s), and louvers that allow air to the shrouded area.

More on next page ▶

W A R N I N G !

I m po r t an t :

Minimum water supply pressure is 25 psi (172 kPa).

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Page 66

M a i n t e n a n c e : G T S s t a n d a r d w a t e r m o d e l s ( c o n t i n u e d )

• When the maintenance requirements are complete: – Replace cleanout plate and tighten the nuts on the plate. – Verify that the probe rod holder is secure and that the

probe plug and cable assembly are plugged into the probe rod holder.

– Verify that the drain valve assembly is in the closed

position. – Replace and secure all covers and doors. – Turn on the water supply. – Turn on the electrical power. – Turn on gas. – Do not leave humidifier unattended. Allow the humidifier

to cycle through multiple fill cycles and verify that the

humidifier cover, cleanout plate, and probe holder gasket

are not leaking.

3. Off-season maintenance

• Perform complete inspection and cleaning of the following: – Probe rods – Skimmer port and water seal – Humidifier tank – Heat exchanger

• After cleaning, the humidifier should remain empty until

humidification is required.

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M a i n t e n a n c e : G T S - D I m o d e l s

GTS-DI models DI water quality recommendations

• Verify regularly that water processing equipment is operating correctly. The presence of chlorides in improperly processed DI water can cause pitting and failure of the tank and heat exchanger. Your DRI-STEEM warranty does not cover damage caused by chloride corrosion.

• GTS-DI models do not require regular cleaning, although regular inspections are advised.

• GTS-DI models do not require skimming or draining and flushing to remove precipitated minerals. However, at the end of a humidification season, drain all DI humidifiers either by manually opening the drain valve or by programming the humidifier to automatically drain at end-of-season (electric fill and drain valve required).

Cool down humidifier before beginning maintenance

Before performing any maintenance, allow the tank to cool down.

• Tanks will have hot surfaces.

• Verify that there is no call for humidity and that the aquastat set point (adjusted using the keypad/display Set Up screens) is less than room temperature (default setting is 40 °F [4 °C]) so the unit does not fire-up while cooling down the tank.

• For models with a standard drain valve:

– Manually open the drain valve. – The float valve opens. – Let the fill water run until the tank is cooled; then shut off the

field-installed manual supply water shut-off valve.

– Let the tank drain; then manually close the drain valve.

• For models with end-of-season drain option:

– Use the keypad to perform the cool down process. – Go to the Home screen and change mode to Drain. – Allow approximately half the water to drain out of the tank. – Go to the Home screen and change mode to Auto; the fill valve

opens and the humidifier cools down.

– When the fill valve closes, select Manual Drain in the control

modes screen and allow the tank to drain completely dry. The humidifier should be cool enough to work on.

– For more information about using the Vapor-logic4 keypad

or web browser interface, see the Vapor-logic4 Installation and

Operation Manual.

W A R N I N G !

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Page 68

W A R N I N G !

When servicing controls, before disconnecting, label all areas. Wiring errors can cause explosion or ﬁre, resulting in severe bodily injury, death, or signiﬁcant property damage.

M a i n t e n a n c e : G T S - D I m o d e l s ( c o n t i n u e d )

Inspection

1. Annually (also recommended when maintenance is performed)

• Inspect tank and gaskets for leaks.

• All safety devices in the control circuit should be cycled on and off to verify they are functioning. These include:

– High limit switch – Airflow proving switch – Low water cutoff switch

• Verify that the float valve is closing off. If the float valve will not shut off, there may be particulate on the valve seat, or the stopper may be worn and need replacing.

• As long as mineral-free water is used in the GTS, no cleaning or flushing of the humidifier should be necessary.

2. Seasonally (or as required, depending on water quality)

• Inspect blower motor. Since a lubrication port is not provided, lubrication is not required.

• Remove dust — Using a vacuum, remove all dust from areas around the motor, vent fan(s), and louvers that allow air to the shaded area.

3. Off-season maintenance

• Perform a complete inspection of the following:

– Float valve – Low water cutoff switch – Humidifier tank and gaskets – Heat exchanger

• Drain humidifier tank and rinse.

• After inspection, the humidifier should remain empty until humidification is required.

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Page 69

G T S t r o u b l e s h o o t i n g

The Vapor-logic4 Installation and Operation Manual that shipped with your humidifier is a comprehensive operation manual. Refer to it for troubleshooting information.

Download DRI-STEEM literature

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

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Page 70

•

Figure 68-1: GTS replacement parts

G T S r e p l a c e m e n t p a r t s

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OM-1243

Page 71

G T S r e p l a c e m e n t p a r t s

Table 69-1: GTS replacement parts

No. Description Part no. No. Description Part no.

1 Tank Consult factory 19 Plug, ¾" 250192-002

2 Heat exchanger Consult factory 20 Plug, 1½" 250681-002

3 Heat exchanger gasket Consult factory 21 Redundant probe * 405726-001

4 Flue box Consult factory 22 Bushing 405805-004

5 Probe plate 165302-005 23 Adapter weld * 168010-005

6 Probe plate gasket 308235-006 24 Probe plug * 406050-100

7 Cleanout plate 165479-001 25 Probe assembly * 406303-010

8 Cleanout plate gasket 308235-005 26 Probe gasket 309750-004

9 DI ﬂoat valve assembly ** Consult factory 27 DI ﬂoat switch ** 408420-002

10 Burner gasket 308230-006 28 DI ﬂoat weld ** 167789

11 Burner Consult factory 29 Redundant DI ﬂoat weld ** 167789-002

12 Blower gasket 308230-007 30 Temperature sensor bracket 128666-001

13 Blower 405800-003 31 Temperature sensor 405760

14 Gas valve 405800-007 32 Temperature sensor gasket 308230-011

15 Ignitor 405719 33 Gas manifold weld *** Consult factory

16 Sight glass bracket 128661 34 Sealed combustion assembly *** Consult factory

17 Sight glass 405720 35 Pallet/shroud components *** Consult factory

18 Flame sensor 405725

Notes:

* Standard water models only ** DI models only *** Not shown

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Page 72

•

Figure 70-1: GTS fill, drain, and blocked flue replacement parts

G T S f i l l , d r a i n , a n d b l o c k e d f l u e r e p l a c e m e n t p a r t s

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OM-1244

Page 73

G T S f i l l , d r a i n , a n d b l o c k e d f l u e r e p l a c e m e n t p a r t s

Table 71-1: GTS fill, drain, and blocked flue replacement parts

No. Description Part no.

1 Water tempering valve 505090-001

2 Water tempering tank Consult factory

3 Drain hose cuff 305389-003

4 Top water seal tube 204812-201

5 Bottom water seal tube 204812-202

6 Fill valve, DI EOS models ** 505086

7 Fill valve, standard water models * 505095

8 Strainer * 300050

9 Blocked ﬂue sensor 406190

10 Flexible tubing 405722

11 Copper tubing 100038-025

12 Compression elbow 405723

13 Drain valve, standard water models * 505075

14 Drain valve, DI-EOS models ** 193458

15 Hose clamp 700560-100

16 Adapter, NPT × C 204700

17 Fill hose *** Consult factory

18 Water tempering hose *** Consult factory

Notes:

* Standard water models only ** DI models only *** Not shown

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Page 74

Figure 72-1: GTS electrical replacement parts

G T S e l e c t r i c a l r e p l a c e m e n t p a r t s

Note: See Page 74 for GTS in Outdoor Enclosure parts.

Pag e 7 2 • DR I - STE E M GTS H u m idif i er In s t alla t ion, O p era t i on, a n d Main t enan c e Manu a l

OM-7470

Page 75

G T S e l e c t r i c a l r e p l a c e m e n t p a r t s

Table 73-1: GTS electrical replacement parts

No. Description Part no.

1 Ground wire lug 409250-003

2 Vapor-logic4 main board 408495-001

Ignition module (for North America) 405800-005

Ignition module (for Europe) 405800-006

4 Low water board * 405726 *

Transformer (for North America) 408965-001

Transformer (for Europe) 408985

6 Relays, Sockets, time delay Consult factory

7 Wire channel 408999-001

8 DIN-rail end bracket 408252-006

9 Circuite breaker, 2-pole (for Europe only) 406775-004

10 Circuit breaker, single-pole (for SDU option only) 406775-009

11 Terminal strip Consult factory

Note:

* Standard water models only

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Page 76

Figure 74-1: Outdoor enclosure electrical replacement parts

O u t d o o r e n c l o s u r e e l e c t r i c a l r e p l a c e m e n t p a r t s

Note:

For European models, refer to Fisair diagrams

Pag e 7 4 • DR I - STE E M GTS H u m idif i er In s t alla t ion, O p era t i on, a n d Main t enan c e Manu a l

Not shown

OM-7471

Page 77

O u t d o o r e n c l o s u r e e l e c t r i c a l r e p l a c e m e n t p a r t s

Table 75-1: Outdoor enclosure electrical replacement parts

No. Description Part no.

1 Vapor-logic4 display with back

Fan assembly (for North America) 185110-001

Fan assembly (for Europe) 185110-002

3 High limit stat 405800-065

Fan stat (for North America) 405800-067

Fan stat (for Europe) 405871-002

Heater stat (for North America) 405800-066

Heater stat (for Europe) 405871-001

6 Ground wire lug 409250-003

7 Power block 408300-002

8 Circuit breaker 406775-005

9 Relays, sockets, time delay Consult factory

10 Heater assembly, 500W * Consult factory

11 Heater assembly, 1100W * Consult factory

12 DIN-rail end bracket 408252-006

Note:

* Not shown

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I n f o r m a t i o n f o r E u r o p e a n m o d e l s o n l y

Electrical warning label

Location: Control cover, shroud

Definition: Electrical shock hazard

Important:

This equipment is for use with second family (G20, G25) natural gases; and third family (G30, G31) propane gas. Contact your distributor before converting to another group or supply pressure.

This equipment has been tested by the Canadian Standards Association International to the Low Voltage, Gas Appliance, and EMC directives and has been certified by AFNOR for use in all EU countries.

Authorized countries of destination

The GTS and GTS-DI humidifiers bearing the CE mark are authorized for use in the European countries listed below.

Austria . . . . . . . . . . .AT Greece ..........................GR

Belgium. . . . . . . . . . . BE Ireland .........................IE

Switzerland. . . . . . . . CH Iceland .........................IS

Germany. . . . . . . . . .DE Italy ..............................IT

Denmark. . . . . . . . . . DK Luxembourg ...............LU

Spain . . . . . . . . . . . . .ES Netherlands ................NL

Finland . . . . . . . . . . .FI Norway ........................NO

France . . . . . . . . . . . .FR Portugal .......................PT

United Kingdom . . .GB Sweden ........................SE

Appliance category

In relation to the country of destination, this humidifier is classified under one of the following boiler categories: category I2H, I2L, I2E, I

, I

2E+

2LL

2ES

2Fi

2ER

3B/P

, I3P.

See the unit data plate for the specific category of your appliance.

Table 76-1: Gas specifications for European models

Humidiﬁer

model

GTS-100 2.31 m3/h 2.82 m3/h 2.31-2.82 m3/h 1.31 m3/h 1.49 m3/h 121 °C -0.025 mbar 6.9 g/s

GTS-200 4.62 m3/h 5.64 m3/h 4.62-5.64 m3/h 2.62 m3/h 2.98 m3/h 163 °C -0.025 mbar 13.8 g/s

GTS-300 6.93 m3/h 8.46 m3/h 6.92-8.46 m3/h 3.93 m3/h 4.47 m3/h 191 °C -0.025 mbar 20.7 g/s

GTS-400 9.24 m3/h 11.28 m3/h 9.24-11.28 m3/h 5.24 m3/h 5.96 m3/h 218 °C -0.025 mbar 27.6 g/s

GTS-500 11.55 m3/h 14.10 m3/h 11.55-14.10 m3/h 6.55 m3/h 7.45 m3/h 218 °C -0.025 mbar 34.5 g/s

GTS-600 13.86 m3/h 16.92 m3/h 13.85-16.92 m3/h 7.86 m3/h 8.94 m3/h 218 °C -0.025 mbar 41.4 g/s

GTS-700 16.17 m3/h 19.74 m3/h 16.17-19.74 m3/h 9.17 m3/h 10.43 m3/h 218 °C -0.025 mbar 48.3 g/s

2H-G20-20 mbar

2E-G20-20 mbar

2Es-G20-20 mbar

Volumetric ﬂow rate by gas category

2L-G25-25 mbar 2LL-G25-20 mbar 2Ei-G25-25 mbar

2E+G20/G25-20/25 mbar

2ER-G20/G25-20/25 mbar

3B-G30-30 mbar 3B-G30-50 mbar

3P-G31-30 mbar 3P-G31-37 mbar 3P-G31-50 mbar

Average ﬂue

temperature

Minimum

draught

requirement

Mass ﬂow rate

of combustion

products

GTS-800 18.48 m3/h 22.56 m3/h 18.47-22.56 m3/h 10.48 m3/h 11.92 m3/h 218 °C -0.025 mbar 55.2 g/s

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I n f o r m a t i o n f o r E u r o p e a n m o d e l s o n l y

Table 77-1: GTS specifications, capacities, and weights for European models

Model

number

GTS-100 34 0-24 0-29

GTS-200 68 0-48 0-59

GTS-300 102 0-72 0-88 DN80 (3") ﬂange DN180 (7") 385 205 4.0

GTS-400 136 0-96 0-117 DN80 (3") ﬂange DN180 (7") 385 205 4.0

GTS-500 170 0-120 0-147 DN100 (4") ﬂange DN200 (8") 500 270 5.5

GTS-600 204 0-144 0-176 DN100 (4") ﬂange DN200 (8") 500 270 5.5

GTS-700 238 0-168 0-205 DN100 (4") ﬂange DN250 (10") 635 320 7.0

GTS-800 272 0-192 0-234 DN100 (4") ﬂange DN250 (10") 635 320 7.0

Note:

* The maximum steam capacities listed may be as much as 10% lower than the given values due to local variations in the Wobbe index of G20 and G25 gases.

Capacity notes

• At sea level, 402 kJ are required to raise the temperature of one kilogram of water from 4 °C to 100 °C.

• 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 hoses and tubes. Use the following steam loss guidelines:

– Vapor hose: 0.22 kg/m/h – Insulated pipe: 0.07 kg/m/h – Dispersion tubes: 0.7 kg/m/h

LP gas

All models operate at rated kW input.

Steam

capacity per

hour in kg*

P = (kW) Q = (kW) Steam outlet

DN50 (2") BSPT

or DN50 hose

DN50 (2") BSPT

or DN50 hose

Recommended ﬂue

size (Class B)

DN125 (5") 320 170 2.8

Operating

weight in kg

Shipping

weight in kg

C a ut i o n! Gas pressure to the

humidifier controls must never exceed 6 kPa (60 mbar) or the gas valve will become damaged and require replacement. Immediately install a DN6 pipe thread plugged tapping, accessible for test gauge connection, upstream of the gas supply connection to the appliance.

Full load

amps

Operating characteristics

• Unit is capable of operating in ambient conditions of 5 °C to 40 °C.

• Unit is capable of operating in ambient conditions between 30% RH and 95% RH (noncondensing).

• NOx class 5

Gas supply pressure

• 20 or 25 mbar for natural gas (depending on gas group), and 30, 37 or 50 mbar for propane gas (depending on gas group)

PMS (all units)

• 7.0 bar

Electric supply

• 230V, 667W to 2415W (see data plate)

Max inlet water temperature

• 90 °C

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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 the GTS, which features cleanable, stainless steel construction, and an industry-leading two year warranty that covers all parts.

For more information

www.dristeem.com sales@dristeem.com

DRI-STEEM Corporation

An ISO 9001:2000 certified corporation

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

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

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

DRI-STEEM, Area-type, Drane-kooler, Dri-calc, Rapid-sorb, Ultra-sorb, and Vapor-logic are registered trademarks or 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 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. GTS-IOM-0108 Part No. 890000-101 Rev. C