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IMPORTANT: Read and save these instructions.
GT S
Ga s- t o- S te a m H umidi fi er
Inst allatio n, Op eratio n ,
an d Maintenance Man u 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.
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 per-
formed by a qualified installer, service
agency, or the gas supplier.
For toll-free technical support call:
1-800-328-4447
®
mc_060508_1220

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Summary of Contents for DriSteem GTS

  • Page 1 IMPORTANT: Read and save these instructions. ® GT S Ga s- t o- S te a m H umidi fi er Inst allatio n, Op eratio n , an d Maintenance Man u 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...
  • Page 2 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 ii • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 3: Table Of Contents

    GTS-DI models ........
  • Page 4: Overview

    More safety precautions are on the next page ▶ Page 2 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 5 “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 valve Gas valve power plug DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 3...
  • Page 6 To convert the humidifier to a different gas type, contact DRI-STEEM technical support or your local DRI-STEEM representative/distributor. More safety precautions are on the next page ▶ Page 4 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 7 • 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). DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 5...
  • Page 8: Product Overview

    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). Page 6 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 9 • Damage caused by chloride corrosion is little or no downtime. not covered by your DRI-STEEM warranty. 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.
  • Page 10: Specifications, Capacities, And Weights

    1050 * Add 15 full load amps for outdoor enclosure heater load on all GTS models, add 1 full load amp for an outdoor enclosure without heaters. ** Add 10% to account for skim and automatic drain/flush features if utilized (standard water units only).
  • Page 11: Dimensions

    Steam outlet position 11.63 11.63 11.63 11.63 13.00 13.00 13.00 13.00 Fill valve connection position 13.00 13.00 13.00 13.00 8.75 8.75 8.75 8.75 Drain position 8.00 8.00 8.00 8.00 DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 9...
  • Page 12: Installation

    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. Page 10 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 13: Outdoor Enclosure

    * DRI-STEEM recommends installing a drip tee directly after the factory supplied vent connection. Vertical section of flue must be at least 5' or meet all governing codes, whichever is greater. DRI-STEEM recommends installing a high wind vent cap on all GTS humidifiers. OM-1238...
  • Page 14 O u t d o o r e n c l o s u r e m o u n t i n g 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.
  • Page 15 O u t d o o r e n c l o s u r e m o u n t i n g Location • The GTS outdoor enclosure must be level and located so there is enough clearance for opening the access panels.
  • Page 16 19 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. Page 14 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 17 • In extreme or critical applications in which the unlikely event of a water leak could cause severe damage, DRI-STEEM recommends a thermostat with a remote sensor on the fill line to cut power to the GTS and safety valves to stop fill water to the GTS and drain the fill piping when the temperature is below freezing.
  • Page 18 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.
  • Page 19 16.00 16.00 16.00 16.00 Pipe chase Burner size section 11.00 11.00 11.00 11.00 heater 14.12 20.12 30.12 36.12 Access panel Steam pipe door position 21.00 27.00 37.00 43.00 OM-7432 DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 17...
  • Page 20 • 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...
  • Page 21: Wiring: Electrical Connections

    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.
  • Page 22: Piping

    • Damage caused by chloride corrosion is not covered by 100, 200 your DRI-STEEM warranty. • See the next page for recommended water supply 300, 400, piping for DI/RO water models. 500, 600, 1041 700, 800 Page 20 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 23: Di/Ro Water Models

    700, 800 • See the previous page for recommended water supply piping for standard water models. DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 21...
  • Page 24: Supply Water And Drain Overflow Connections

    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. Page 22 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 25: Water Supply Piping

    W a 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.
  • Page 26 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).
  • Page 27: Drain Piping

    * Cold water inflow pressure must be between 25 psi and 80 psi (172 kPa and 552 kPa). Note: Size water pump to handle a minimum of 12 gpm (45.4 L/m). DC-1117 DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 25...
  • Page 28: Gas Piping

    (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 ▶ Page 26 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 29 16.7 25.2 14.2 21.5 12.5 19.0 See example on page 28. 11.3 17.3 10.5 15.9 15.0 More gas piping instructions 13.9 on the next page ▶ 100 30 13.0 DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 27...
  • Page 30 • Propane: 2500 Btu/ft (25.9 kW-hr/m of the combination gas control valve. For example, if you have a GTS-400 operating on natural gas, For North American models, the calculate the ft /hr or m...
  • Page 31 Gas manifold (by DRI-STEEM) Plugged test gauge connection Manual gas shutoff valve 3” (76 mm) min. Note: OM-1235 Drip pocket Dashed lines indicate supplied by installer DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 29...
  • Page 32: Combustion And Ventilation Air

    Same as confined space; all air from outside the building the building Note: * The minimum dimension of any opening is 3" × 3" (76 mm × 76 mm). Page 30 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 33 The GTS supports sealed combustion using 4" (DN100) PVC or When installing sealed combustion piping CPVC piping (see Figure 31-1). All GTS models have a single point connection to the blower below the humidifier shroud. for more than one GTS humidifier, do...
  • Page 34: Vertical And Horizontal Venting

    Vertical and horizontal venting guidelines (stack connection) W A R N I N G ! • The GTS is a Fan Assisted Category I (natural draft) Appliance. Installations where the vent terminates in a side wall of the The humidifier must be installed by building, or where the overall horizontal run exceeds the overall a qualified technician and meet the...
  • Page 35 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. DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 33...
  • Page 36 ** 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. Page 34 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 37: Dispersion

    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. DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 35...
  • Page 38: Interconnecting Piping Requirements

    • 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 the next page ▶ Page 36 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 39 When using vapor hose, use DRI-STEEM vapor hose for best results. Field-supplied hose may have shorter life and may cause foaming in the evaporating chamber resulting in condensate discharge at the dispersion assembly. Do not use vapor hose for outdoor applications. DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 37...
  • Page 40 Diameter of interconnecting steam hose, pipe or tubing must be equal to or greater than the diameter of the steam outlet. Do not use hose, pipe or tubing that is smaller than the steam outlet. Page 38 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 41: Drip Tee Installation

    • Support vapor hose so there are no sags or low spots • Dashed lines indicate provided by installer DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 39...
  • Page 42: Single Tube And Multiple Tube

    (DN50). Install an adaptor manifold if using multiple 1½" (DN40) dispersion tubes. absorb flash steam, or condensing on nearby surfaces may occur. • All drain lines must be installed and sized according to governing codes. Page 40 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 43 • Assemble multiple dispersion tubes or use a Rapid-sorb or Ultra-sorb dispersion assembly where necessary to accommodate maximum humidifier load. • The smallest GTS humidifier steam outlet is 2" (DN50). Install an adaptor manifold if using multiple 1½" (DN40) dispersion tubes. See also Table 37-1.
  • Page 44 2 Assemble multiple dispersion tubes or use a Rapid-sorb or Ultra-sorb dispersion assembly where necessary to accommodate maximum humidifier load. 3 The smallest GTS humidifier steam outlet is 2" (DN50). Install an adaptor manifold if using multiple 1½" (DN40) dispersion tubes. See also Table 37-1.
  • Page 45 GTS humidifier H (see table, Page 20) 2 The smallest GTS humidifier steam outlet is 2" (DN50). Install an adaptor manifold if using multiple 1½" (DN40) dispersion tubes. See also Table 37-1. 3 Pitch vapor hose, tubing or pipe toward humidifier: –...
  • Page 46 OM-1215a 2 The smallest GTS humidifier steam outlet is 2" (DN50). Install an adaptor manifold if using multiple 1½" (DN40) dispersion tubes. See also Table 37-1. 3 Pitch vapor hose, tubing or pipe toward humidifier: –...
  • Page 47: Rapid-Sorb

    Rapid-sorb header either inside or outside the duct. See the Dri-calc Installation Guides library or contact your representative/distributor or DRI-STEEM for installation instructions for air handler or vertical airflow applications. DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 45...
  • Page 48 1/8"/ft (1%) Rapid-sorb 2"/ft toward Vertical toward condensate 1½" (DN40), 2" (DN50), 1/8"/ft (1%) header drain Tubing or pipe 3" (DN80), 4" (DN100), toward 5" (DN125), 6" (DN150) Rapid-sorb Page 46 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 49 Fasten the L-bracket to the end of the dispersion tubes with the provided bolt, lock washer, and flat washer. More on next page ▶ DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 47...
  • Page 50 • 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. Page 48 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 51 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 ▶ DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 49...
  • Page 52 • Header support bracket fastener 9. Secure and seal the header escutcheon plate around the header. 10. See page 49 for steam supply and condensate drain line connection instructions. Page 50 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 53 4. All drain lines must be installed and sized according to governing codes. DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 51...
  • Page 54: Area-Type Fan

    The Area-type fan, brackets, and wiring are factory installed on the humidifier. Amps (high speed) 1.52 Note: For European models, contact your distributor for Area-type parts. Figure 52-1: Area-type rise, spread, throw OM-1230 Page 52 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 55 * 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 DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 53...
  • Page 56: Operation

    GTS humidifier. Refer to the Vapor-logic4 manual that was enclosed with the product shipment. More on the next page ▶ Page 54 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 57 (See "Adjusting skim duration" in the maintenance section of this manual, and see the Vapor-logic4 Setup menu.) DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 55...
  • Page 58: Safety Systems

    If this system detects a low water condition, the humidifier shuts down until water is present or until the a “GTS low water” alarm is cleared from the Vapor-logic4 Alarm Log. • In addition to monitoring the water level, there is a temperature sensor located near the top of the heat exchanger.
  • Page 59: Start-Up Commissioning Checklist

    Rise ______________________________________ Run ______________________________________ ☐ Slight pitch toward drip tee ☐ Termination point capped and covered Power venter location ________________________ Barometric damper location ___________________ More checklist on next page ... DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 57...
  • Page 60 ☐ Red-orange ____________________________________________ Burner 4 lights after: ☐ First try ☐ Second try ____________________________________________ ☐ Third try ____________________________________________ Burner 4 color after 15 minutes: ☐ Blue ☐ Orange ☐ Red-orange Page 58 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 61: Maintenance

    Note: Disconnecting components from one burner assembly at a time and then cleaning the corresponding combustion chamber and burner will ease reassembly. mc_052708_1610 More on next page ▶ DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 59...
  • Page 62 Any substitution of parts or controls not approved by DRI-STEEM will be at owner’s risk and will void the warranty. Page 60 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 63: Gts Standard Water Models

    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.
  • Page 64 The humidifier should be cool enough to work on. – For more information about using the keypad, see the Vapor-logic4 Installation and Operation Manual. mc_063008_1150 Page 62 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 65 – Inspect the composite plastic probe rod assembly for any signs of cracking, roughness, or deterioration. If found, replace probe assembly. – Reassemble the probe assembly. mc_052908_0815-1 More on next page ▶ DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 63...
  • Page 66 • 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. mc_052908_0815-2 More on next page ▶ Page 64 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 67 • 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. mc_052908_0815-2 DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 65...
  • Page 68: Gts-Di Models

    The humidifier should be cool enough to work on. – For more information about using the keypad, see the Vapor-logic4 Installation and Operation Manual. mc_063008_1150 Page 66 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 69: Troubleshooting

    EPDM seat may be worn and in need of replacement. • As long as mineral-free water is used in the GTS, no cleaning or flushing of the humidifier should be necessary.
  • Page 70: Replacement Parts

    Replacement parts G T S h u m i d i f i e r • Figure 68-1: GTS replacement parts OM-1243 Page 68 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 71 Sealed combustion assembly *** Consult factory Sight glass 405720 Pallet/shroud components *** Consult factory Flame sensor 405725 Notes: * Standard water models only ** DI models only *** Not shown DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 69...
  • Page 72: Fill, Drain, And Blocked Flue

    F i l l , d r a i n , a n d b l o c k e d f l u e • Figure 70-1: GTS fill, drain, and blocked flue replacement parts OM-1244 Page 70 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 73 Adapter, NPT × C 204700 Fill hose *** Consult factory Water tempering hose *** Consult factory Notes: * Standard water models only ** DI models only *** Not shown DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 71...
  • Page 74: Electrical Parts

    E l e c t r i c a l p a r t s Figure 72-1: GTS electrical replacement parts Note: See Page 74 for GTS Outdoor Enclosure parts. OM-7470 Page 72 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 75 DIN-rail end bracket 408252-006 Circuit breaker, 2-pole (for Europe only) 406775-004 Circuit breaker, single-pole (for SDU option only) 406775-009 Terminal strip Consult factory Note: * Standard water models only DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 73...
  • Page 76: Outdoor Enclosure

    O u t d o o r e n c l o s u r e Figure 74-1: Outdoor enclosure electrical replacement parts Not shown Note: For European models, refer to Fisair diagrams OM-7471 Page 74 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 77 Circuit breaker 406775-005 Relays, sockets, time delay Consult factory Heater assembly, 500W * Consult factory Heater assembly, 1100W * Consult factory DIN-rail end bracket 408252-006 Note: * Not shown DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 75...
  • Page 78: European Models

    16.17-19.74 m 9.17 m 10.43 m 218 °C -0.025 mbar 48.3 g/s GTS-800 18.48 m 22.56 m 18.47-22.56 m 10.48 m 11.92 m 218 °C -0.025 mbar 55.2 g/s Page 76 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual...
  • Page 79 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 DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 77...
  • Page 80: Warranty

    DRI-STEEM, and paid for in full by the purchaser. Canada and the European community. mc_051308_0630 © 2010 DRI-STEEM Corporation Printed on 30% recycled paper Form No. GTS-IOM-M-0610 Page 78 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual Part No. 890000-102 Rev. E...

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