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READ AND SAVE THESE INSTRUCTIONS
This manual must be left with the owner and should be accessible for reference.
DRI-STEEM Models
GTS
GAS-TO-STEAM HUMIDIFIERS
WARNING: 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.
WHAT TO DO IF YOU SMELL GAS
• Installation and service must be performed by a qualified
installer, service agency, or the gas supplier.
support call: 1-800-328-4447
®
and GTS-DI
Installation, Operation
and
Maintenance Manual
• 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.
For toll-free technical

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Summary of Contents for DriSteem GTS

  • Page 1 READ AND SAVE THESE INSTRUCTIONS This manual must be left with the owner and should be accessible for reference. DRI-STEEM Models ® and GTS-DI GAS-TO-STEAM HUMIDIFIERS Installation, Operation Maintenance Manual WARNING: 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.
  • Page 2 FOREWORD To the purchaser and the installer Thank you for purchasing DRI-STEEM Model GTS ® equipment. We have designed and built this equipment to give you total satisfaction and many years of trouble-free service. Proper installation and operating practices will ensure your achieving that objective. We therefore urge you to become familiar with the contents of this manual.
  • Page 3: Table Of Contents

    TABLE OF CONTENTS ® program code nomenclature ........4 Models GTS and GTS-DI ............5 Safety precautions ..............6 Specifications and capacities ..........7 Dimensions ................8 Installation Precautions ..............9 Required clearances ........... 9 Locating the humidifier ..........10 Supply water and drain overflow connections ....
  • Page 4: Gts ® Program Code Nomenclature

    M = Metric 2 = Externally staged 3 = not used B. VAPOR-LOGIC system type: 4 = not used ® G = GTS 5 = not used ® S = STS 6 = GTS ® L = LTS 7 = TP ®...
  • Page 5: Models Gts And Gts-Di

    This heat exchanger is, in turn, 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. The GTS is compatible with DRI-STEEM's dispersion panels RAPID-SORB ®...
  • Page 6: Safety Precautions

    • Inspect humidifier and accessories upon arrival for box, or control shroud. damaged, missing, or improper parts. If there is a problem, call DRI-STEEM. • Should overheating occur, or the gas supply fail to shut off, shut off the manual gas valve to the appliance •...
  • Page 7: Specifications And Capacities

    1275 2025 1325 (DN100) * Add 15 full load amps for outdoor enclosure heater load on GTS 100-400. * Add 20 full load amps for outdoor enclosure heater load on GTS 600-800. High altitude Capacity notes A derate in Mbh/kW exists due to high altitude. See the •...
  • Page 8: Dimensions

    DIMENSIONS Mechanical dimensions GTS-100, GTS-200 GTS-300, GTS-400 GTS-600 GTS-800 Description inches inches inches inches Floor stand length 31.85 31.85 31.85 31.85 Overall length 44.50 1130 49.00 1245 49.00 1245 49.00 1245 Height of evaporating chamber 33.25 33.25 33.25 33.25 9.25 12.00...
  • Page 9: Installation

    CAN/CGS-B149.1, “Installation Code for Natural Gas Burning Appliances and Equipment,” or GTS clearance recommendations CAN/CGA-B149.2, “Installation Code for Propane Burning Applications and Equipment.” For recommended service and maintenance purposes the following clearances should be maintained: •...
  • Page 10: Locating The Humidifier

    INSTALLATION Locating the humidifier Supply water and drain overflow connections • Provide a level, solid foundation for the humidifier. Locate the humidifier as near as possible to a chimney IMPORTANT: The humidifier is shipped with the auto- or outside wall so that the flue pipe from the humidifier matic drain valve locked in the manual open position.
  • Page 11: Makeup Water Piping And Material

    INSTALLATION Makeup water piping and material flow with the needle valve will reduce fill cycle noise generated by collapsing steam in the humidifier. Adjusting Minimum makeup water pressure must be 25 psi the needle valve will also reduce the drop in output during (172 kPa).
  • Page 12: Gas Piping Guidelines

    INSTALLATION Gas piping guidelines • Do not use soap solution or open flame on humidifier gas train. A gas leak detector is recommended. CAUTION: • Install a ground joint union and a manual shutoff valve Gas pressure to humidifier controls must never immediately upstream of the unit including a 1/8"...
  • Page 13: Gas Piping

    3" (76 mm) min. 3" (76 mm) min. (DN15 x DN15 x DN25 tee) Drip pocket* Drip pocket* ® 100-200 GTS 300-400 * Supplied by others OM-1086 * Supplied by others OM-1087 To gas To gas To gas To gas...
  • Page 14: Gas Leak Testing

    (1.75 kPa) for natural gas or LP gas. Purging of gas piping should be performed as described in ANSI For example, if you had a GTS-400 operating on natural Z223.1 (latest edition) or, in Canada, in CAN/CGA-B149 gas, you would calculate the cfh or m /hr as follows: codes.
  • Page 15: Combustion And Ventilation Air

    The GTS supports both room air and sealed combustion. 4" (DN100) PVC or CPVC piping (see drawings on the Requirements and recommendations for each follow. next page). On the GTS-100 and GTS-200, there will be a single point connection to the blower. On the GTS-300 CAUTION:...
  • Page 16: Electrical

    24 VAC control voltage. • When installed, the GTS humidifier must be electrically grounded in accordance with local codes or, in the 4" dia. (DN100) PVC or CPVC for 4" dia. (DN100) PVC or CPVC for...
  • Page 17: Flue Venting Guidelines

    National Fuel Gas ® • The GTS is a Fan Assisted Category II Appliance. Code or Canadian CAN/CGA.B149 requirements. • Maximum flue temperature is 390 °F (217 °C) + ambient.
  • Page 18 INSTALLATION Special horizontal venting requirements ® venting • Distances from the vent terminal to adjacent public Power Barometric walkways, buildings, and openable windows and Vent venter draft control hood building openings must be consistent with the National Fuel Gas Code, ANSI Z223.1, and/or CAN/CGA B149 Installation Codes.
  • Page 19: Standard

    Support legs OM-3000 OM-1078 Note: See Page 20 for more drawings of the indoor The GTS ships with support legs for floor stand mounting. enclosure. For proper operation of the electrode-probe, water-level control and the skimmer system, the humidifier must be ®...
  • Page 20 Never move the Flue leg assembly with the unit mounted on it. outlet OM-3001 * For GTS 100-400, A = 31" (787 mm). For GTS 600-800, A = 47.5" (1207 mm). Side view indoor enclosure Front view indoor enclosure 47.00"...
  • Page 21: Adjustable Leg Assembly Option

    13" (33 cm) leg 17" (43 cm) leg Step 2: Assemble cross braces to the legs 26" (66 cm) cross brace (for GTS • Attach the angle brackets (#6) to the four 13"-long legs 100-400) (#1) using a 3"-long bolt (#10), two washers (#7) and a 43"...
  • Page 22: Outdoor Enclosure

    These valves should be powered on the same circuit as enclosure at these knockouts. the GTS such that if the power goes off, water will drain out of the fill line to prevent freezing. • When unit is to be mounted on an outdoor curb, there must be a gasket between the top of the curb and the •...
  • Page 23 MOUNTING THE HUMIDIFIER Typical rooftop installation Steam dispersion piping Flue GTS humidifier in outdoor enclosure Roof surface Gas piping Electrical connections Curb Drain piping Remote VAPOR-LOGIC keypad Water piping OM-1111 Outdoor enclosure mounting options Legs * For GTS 100-400: A = 35.88" (911 mm) B = 35"...
  • Page 24 35 °F (2 °C), power is allowed to the GTS subpanel and the GTS unit is • When ordered with the heater package, two thermostat- enabled. The strip heaters will remain on until the controlled heaters are provided: one strip heater is enclosure reaches 50 °F (10 °C) to ensure that the...
  • Page 25: Mounting The Humidifier

    Power block 1½" (38 mm) knockouts OM-1090 4" (102 mm) o.c. Emergency drain Note: All piping from the GTS unit to the steam outlet 60" OM-1091 Pipe chase is stainless steel pipe. Final connection to the steam (1524 mm)
  • Page 26: Steam Supply Connection Methods

    5" (127 mm) min. ® Condensate also can be returned to the GTS , as shown ¾" tubing in the figure on the next page, with an air vent. This...
  • Page 27: Condensate Return Piping

    ® RAPID-SORB components with packing list. 1. Punch or cut out necessary clearance holes Report any shortages to the DRI-STEEM factory for RAPID-SORB header. Slide header into immediately. the duct, position header and slide the 2. Provide necessary access in and around duct work.
  • Page 28 * Refer to local codes for drain pipe sizing and maximum temperature requirements. RAPID-SORB unit: Header outside the duct 1" x 1-1/2" (25 mm x 38 mm) SST Top of duct Mounting channel channel (by DRI-STEEM) or casing Dispersion tube Duct Orificed tubelets Escutcheon Slip coupling...
  • Page 29: Vertical Duct Installation

    5" (125 mm) min. Piping (by others) Open drain ® Piping/hose sizing from the GTS to a RAPID-SORB panel, and maximum steam carrying capacity* * Based on total pressure drop in Copper or stainless piping/hose of 5" wc (1.25 kPa).
  • Page 30: Area-Type Application

    • The AREA-TYPE fan is not available on GTS-600 or GTS-800. Minimum distance for rise, spread and throw AREA-TYPE fan specifications...
  • Page 31: Start-Up And Operation

    START-UP AND OPERATION Introduction • The negative pressure gas valves used on the GTS are designed to keep a constant ratio of air and gas After the system has been properly installed and con- throughout the operating range of the blower. If the flue...
  • Page 32: Start-Up/Commissioning Check Sheet

    START-UP AND OPERATION ® ® Start-up/commissioning check sheet for a GTS with a VAPOR-LOGIC controller Visit date________________________________________ Job site representation: Model # _________________________________________ ________________________________________________ Serial # _________________________________________ ________________________________________________ Tag # ___________________________________________ ________________________________________________ Job name _______________________________________ Program code ____________________________________ DRI-STEEM rep __________________________________...
  • Page 33 START-UP AND OPERATION ® ® Start-up/commissioning check sheet for a GTS with a VAPOR-LOGIC controller (cont.) Dispersion Safety testing to verify function o ULTRA-SORB ® Low water test ______________________________ o RAPID-SORB ® High humidity limit test _______________________ o Single-Tube Air flow test ________________________________...
  • Page 34: Maintenance

    Makeup water piping - Use cold or hot makeup water. Even though the GTS has an internal 1" (25 mm) air gap, Each time the GTS refills, it fills to an elevation near the some local codes may require a vacuum breaker.
  • Page 35: Both Gts And Gts-Di

    CO levels in the flue. See carbon monoxide (CO) level in the flue. If CO level is burner maintenance instructions below. greater than 400 ppm, immediately shut down the GTS unit and consult the factory. Burner maintenance instructions •...
  • Page 36: Troubleshooting

    EEPROM memory causing humidifier alarm is highlighted will reveal the date and time the alarm to not operate properly. Contact DRI-STEEM. occurred and a brief description of the fault shown. • Flue Fault: The air damper switch and/or the power...
  • Page 37 TROUBLESHOOTING Problem Problem Possible cause Action number Alarm light on The controller has On the VAPOR-LOGIC keypad, go to the Alarms screen VAPOR-LOGIC identified a system from either the Idle screen or Main Menu to identify the keypad malfunction. fault. Refer to the "Fault messages, diagnostics" section of the VAPOR-LOGIC manual.
  • Page 38 TROUBLESHOOTING Problem Problem Possible cause Action number Tank will not fill No water supply Check if water supply line strainer is plugged. with water. through the fill valve Check fill valve for sediment. Verify that manual water line shut-off valve is open and that pressure exists (minimum 25 psi [172 kPa], maximum 90 psi [621 kPa]).
  • Page 39 (2 grains per gallon). Or, add a handful of salt to the tank. If this solves the problem, consult DRI-STEEM for advice (standard water systems only). Verify that fill valve wiring is correct. Check date code on top of probe rod assembly. If probe is...
  • Page 40 TROUBLESHOOTING Problem Problem Possible cause Action number Tank will not Drain valve, outlet or Clean. drain. drain lines are plugged with minerals. Manual drain valve is Open valve. closed. Electric drain valve Check for 24 VAC across valve; if not present, replace malfunction valve.
  • Page 41 TROUBLESHOOTING Problem Problem Possible cause Action number Tank will not heat There is no water in See Problem No. 3 in this troubleshooting guide. the tank. Tank fills See Problem No. 4 in this troubleshooting guide. continuously. Control malfunction Go to the Diagnostics screen on VAPOR-LOGIC keypad, (accessed from the Main Menu) and refer to the VAPOR-LOGIC...
  • Page 42 TROUBLESHOOTING Problem Problem Possible cause Action number Reduced or no Controller has shut Go to the Diagnostics screen on the VAPOR-LOGIC steam output system down. keypad (accessed from the Main menu) and refer to the VAPOR-LOGIC manual for instructions. See also (or low humidity) Problem No.
  • Page 43 Increase set point if set point is below actual environmental conditions. Consult DRI-STEEM regarding possible incompatibility between control signal and program. Unit is undersized. If unit is operating properly but fails to meet required output, replace with a larger unit or add an additional humidifier.
  • Page 44 TROUBLESHOOTING y t i y f i y l l l l a f i c P " " e P " t s i y t i " s . c t v i t i d i . y f y t i s f f i l a...
  • Page 45 (e.g., during a time when the building is not in use). Consult DRI-STEEM about retrofitting a standard water system to a DI water system. (DI systems do not require skimming, or regular draining and flushing, because there are no minerals to remove from the tank.)
  • Page 46 TROUBLESHOOTING Problem Problem Possible cause Action number Fluctuations in Hunting "Hunting" describes cyclical humidity swings above and (cont’d.) output below the desired set point. Possible causes and actions include: (or "hunting") Cause Action Air temperature varying Stabilize air temperature to rapidly +/- 1°.
  • Page 47 TROUBLESHOOTING Problem Problem Possible cause Action number Noisy operation "Thunder" type noise This noise, normal on large capacity units, is caused by coming from tank cold fill water collapsing steam in the tank. Try reducing during refill inlet water supply pressure (minimum of 25 psi [172 kPa]); or adjust inlet needle valve for a slower fill rate.
  • Page 48 TROUBLESHOOTING l l i t r i i f i c i t l l i s t i r i f , y t y t i l l i l l i t t i l l l i l l i...
  • Page 49 TROUBLESHOOTING i o j / r i t t i f t t i f . y l i r c l l a y l l . ) t y l t . y l y l t i f i s l l...
  • Page 50: Replacement Parts

    REPLACEMENT PARTS ® Standard GTS replacement parts OM-1098 Notes • Two-burner unit is shown above. • Parts are consistent across all models. • See tables on next page for parts listing.
  • Page 51 Flange, gas valve 405800-009 Plug, 1/4" NPT stainless steel 250650-001 Gas manifold (two-burner) Adaptor weld 168010-001 * These items are an assembly of multiple parts. Contact DRI-STEEM customer service to order. TAB = Refer to your specific model number for correct part.
  • Page 52 REPLACEMENT PARTS ® -DI replacement parts OM-1099 Notes • Two-burner unit is shown above. • Parts are consistent across all models. • See tables on next page for parts listing.
  • Page 53 300400-010 Plug, 1/4" NPT stainless steel 250650-001 * These items are an assembly of multiple parts. Contact DRI-STEEM customer service to order. ** End of season drain option only. TAB = Refer to your specific model number for correct part.
  • Page 54 DIN rail, 10.75" long 167765-0107 Relay, 24V 3PDT (GTS 300-400) 407900-017 Door lock with key 700700 Relay socket, 3PDT without time delay** (GTS 300-400) 407900-009 Wire channel, 12" long 408999-001 Relay socket, DPDT with time delay* (GTS 100-200) 407900-010 Wire channel cover...
  • Page 55 REPLACEMENT PARTS ® electrical replacement parts for GTS 600-800 models OM-2017A ITEM DESCRIPTION PART NO. ITEM DESCRIPTION PART NO. Control cabinet, 20x20x7 407100-007 End cap, DIN rail 408252-005 Terminal, ground 408252-010 Subpanel, VAPOR-LOGIC3 165722-004 End bracket, DIN rail 408252-006 Main board, VAPOR-LOGIC3...
  • Page 56 165702-003 165703-003 Door 165702-004 165702-004 Corner wrap 165702-005 165703-005 Back wrap 165702-001 165703-001 Base 165511-001 165511-002 Door lock with key 700700 700700 Leg assembly (optional) * These items are an assembly of multiple parts. Contact DRI-STEEM customer service to order.
  • Page 57 OM-2019A To exhaust To exhaust hole in side of hole in side of enclosure enclosure GTS-100, GTS-200 GTS-300, GTS-400 Side of GTS outdoor enclosure To flue collar on GTS unit To flue collar on GTS unit OM-2020 OM-2021 To exhaust...
  • Page 58 " 0 " 2 " 7 " 0 These items are an assembly of multiple parts. Consult DRI-STEEM customer service to order. Specify the length listed in the description when ordering. Refer to your specific model number for correct part.
  • Page 59: Caution Label

    FOR YOUR SAFETY READ BEFORE OPERATING If you do not follow these instructions exactly, a fire or WARNING explosion may result causing property damage, personal injury or loss of life. A. This appliance does not have a pilot. It is equipped •...
  • Page 60: Two-Year Limited Warranty

    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.

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