READ AND SAVE THESE INSTRUCTIONS This manual must be left with the owner and should be accessible for reference. DRI-STEEM Models GTS and GTS-DI ® ® GAS-TO-STEAM HUMIDIFIERS User's/Installation Instructions and Maintenance Operations 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.
TABLE OF CONTENTS 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 assure you of achieving that objective. We therefore urge you to become familiar with the contents of this manual. DRI-STEEM Humidifier Company GTS Program Code Nomenclature ......................................
GTS PROGRAM CODE NOMENCLATURE GTS PROGRAM CODE NOMENCLATURE 1 T O O X 7 8 A (Example) How many tanks are in the system (1-6) What type of control does the unit have S - Single staged E - Externally staged Z - Zone valve T - TP X – Slave M – Master Does the unit have VAV V - Yes O - No Does the unit have temperature compensation T - Yes O - No Humidity sensor type C - 0-135 OHM humidistat Electric D - 6-9 VDC humidistat F - 1-10 VDC humidistat E - 4-20 mA humidistat X - 4-20 mA transmitter S - Slav
GTS® AND GTS-DI HUMIDIFIERS GTS Gas-to-Steam Humidifier This humidifier is designed to be used with either softened or unsoftened water. (Softening is recommended to reduce need for cleaning.) The probe-type level control system requires water conductivity of 100 micromhos/cm, this translates to about 2 grains/gal minimum to function, and therefore will not operate on water treated by reverse osmosis or deionization. However, GTS humidifiers are available for use with these water types.
SAFETY PRECAUTIONS WARNING: Improper installation, adjustment, alteration, service, maintenance, or use can cause carbon monoxide poisoning, an 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.
INSTALLATION Precautions Required Clearance: • The installation must conform to the requirements of the authority having jurisdiction or, in the absence of such requirements, to the National Fuel Gas Code, ANSI Z223.1 (latest edition). In Canada, the installation of this unit must comply with local plumbing or waste water codes and other applicable codes and with the current code CAN/CGS-B149.1 "Installation Code for Natural Gas Burning Appliances and Equipment" or CAN/CGA-B149.
INSTALLATION Important: • Remove all shipping brackets and materials before operating the humidifier. • 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 wiring diagram furnished with this unit. • Turn off all gas while installing the run-out and manual shut-off valve for the humidifier.
INSTALLATION Drain Piping and Material Drain piping diagrams are provided on page 15. If nonmetallic pipe or hose is used, it must be capable of withstanding temperatures up to 212°F. To prevent steam from escaping out the drain line, a water seal must be provided in the drain line of sufficient height to contain the pressure developed within the humidifier and steam dispersion system. To determine the proper height of the water seal, see table 15-1 on page 15.
INSTALLATION Gas Piping (See "Gas Piping" diagram on page 15.) • Do not use soap solution, or open flame on humidifier gas train. A gas leak detector is recommended. CAUTION: Gas pressure to humidifier controls must never exceed 14” W.C. (1/2 psi). A 1/8" inch NPT plugged tapping, accessible for test gauge connection, must be installed immediately upstream of the gas supply connection to the appliance.
INSTALLATION • Two stage gas valves (used on GTS® 400, 200 and 100) have a 10 second high fire stage and then drop to a normal fire stage. Factory settings for natural gas are 5" w.c. high, 3 1/2" w.c. normal. Factory settings for L.P. gas are 8" w.c. high, 6" w.c. low. These pressures can be checked on the combination gas valve at the out pressure tap (see page 33). Electrical CAUTION: Do not connect aluminum wire between disconnect switch and humidifier. Use only copper wire.
INSTALLATION • 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 block the flow of combustion and ventilation air. To provide for necessary oxygen for proper combustion, opening must be provided to allow outside air to enter the space in which the heater is located.
INSTALLATION • No portion of the vent system shall extend into, or pass through, any circulation air duct or plenum. • The Type B vent system shall terminate above the roof surface per the National Fuel Gas Code or CAN/ CGA.B149 requirements, and shall include a UL or CUL listed vent cap or roof assembly, unless prohibited by local codes. • This humidifier may be commonly vented with other listed gas-fired appliances. Total input rates of all appliances will determine the vent size.
SPECIFICATIONS AND CAPACITIES Table 13-1: Specifications 115 volt, 60 Hz Steam capacity per hour in lbs. (kg.) *MBH input GTS-75 55 (25) 75 1 5 (130) 400 (180) GTS-100 75 (34) 100 1 5 (130) GTS-150 110 (50) 150 2 GTS-200 150 (68) 200 GTS-300 225 (102) GTS-400 300 (136) Model number Heating stages Vent size in inches (mm) Operating weight in lbs. (kg.) Shipping weight in lbs. (kg.) Full load amps Max. fuse size 230 (105) 2.
DIMENSIONS Recommended ZTU cord location knockout Figure 14-1: Dimensions E D K B H Recommended power supply knockout J C F G L Recommended low voltage control wiring knockout ¾” Copper drain N A Side View Front View Side View Clean-out tray ¼” NPT Fill Table 14-1: Dimensions Description M Top View 14 GTS®-75 GTS-100 (One burner) GTS-150 GTS-200 (Two burner) GTS-300 GTS-400 (Four burner) 19" 19" 27½" A Floor stand width B Overall length 54¼" 54¼" 54¼" C Height of evapor
PIPING DIAGRAMS: GAS, WATER, AND DRAIN Steam Outlet Standard Unit (Non-DI/RO Water) Needle Valve Water Supply Line (25 psi minimum) Solenoid Water Make-up Valve Three-Probe Level Control and Low Water Cut-off Water Skim/Overflow Outlet Manual Electric Drain Valve Shroud Drain and Water Seal Piping* (by installer) * Air Gap ** Open Drain** OM-736 Flue Connection Gas Piping Drain piping material must be suitable for 212°F (100°C) water.
MOUNTING THE HUMIDIFIER For proper operation of the electrode-probe, water-level control and the skimmer system, the humidifier must be mounted level left to right and front to rear. forms on the heat exchanger continuously flakes off as it forms and settles to the bottom. A clean-out tray on the floor of the tank may be removed periodically through the back clean-out opening. Proper access (18" minimum) for periodic removal of the top cover is recommended.
STEAM SUPPLY CONNECTION METHODS Figure 17-1: Steam Supply Using Vapor Hose Vapor hose. See table 18-2 for sizing. (Pitch back min. 2" per foot to humidifier with supports to prevent sagging.) Maximum length 10'. Humidifier must be mounted level. Stainless steel dispersion tube in middle of duct. Pitch as shown in figure 18-1. Typically, GTS® requires multiple dispersion tubes. See table 18-2 on page 18 for capacities.
DISPERSION TUBE INSTALLATION Dispersion Tube Installation with Condensate Drain (over 28 pph per dispersion tube) Figure 18-1: Single Tube Vapor Hose • Vapor hose should be supported to prevent sags or low spots and to maintain a minimum pitch of 2" per "B" Dia. (TYP) foot back to the humidifier. .25" Dia. (TYP) • For mounting the humidifier above the level of dispersion tube, see figure .625 Dia. 8-2 on page 8.
RAPID-SORB® ASSEMBLY AND INSTALLATION Horizontal Duct Installation 1. Unpack shipment and verify receipt of all RAPID-SORB® components with packing list. Report any shortages to the DRI-STEEM factory immediately. 8. Check that the dispersion tubes release steam perpendicular to the air flow. Secure tubes to the overhead channel. Secure the channel to the duct, position hose cuffs or slip couplings over tube and header tube nipples, and secure. 2. Provide necessary access in and around duct work. 3.
RAPID-SORB® ASSEMBLY AND INSTALLATION Vertical Duct Installation Install the RAPID-SORB with dispersion tubes and header pitched to condensate drain as shown in figures 20-1, 20-2, and 20-3. See "Instructions for Horizontal Duct" for additional information, as applicable. Figure 20-1: Plan View Figure 20-2: Elevation View Tube without Drain Airflow Recommended 2" per foot pitch Steam Supply 6" Min. Drain 1/8" per foot pitch minimum 5" Min.
GTS® AREA-TYPE HUMIDIFIER AREA-TYPE Humidifier Application Information The operating characteristics of AREA-TYPE steam humidifiers should be considered when selecting humidifier capacities and choosing mounting locations. Table 21-1 Minimum Distance for Rise, Spread and Throw Space Temp. Space R.H. 30% Steam discharge from the humidifier quickly cools and turns to visible, warm, microscopic drops or particles of water (fog) which are lighter than air.
START-UP AND OPERATION Introduction Safety Systems After the system has been properly installed and connected to gas, electrical, water supplies, and controls it may then be started. The GTS humidifier has a number of systems and safeguards to ensure proper operation: • First, when there is a call for humidity, all of the combustion blowers must start. Each combustion blower contains a centrifugal switch that closes when the motor reaches a certain speed.
MAINTENANCE For high performance, and to minimize possible equipment failure, it is essential that periodic maintenance and inspections be performed on this appliance. GTS® Standard Model Only Using softened water will significantly reduce mineral build-up in the humidifier. When softened water is not available, the GTS is designed to deal with water hardness in one of two ways depending on the degree of hardness.
MAINTENANCE When servicing or repairing this equipment, use only DRI-STEEM approved service replacement parts. A complete replacement parts list are on pages 26 and 27. 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. Both GTS® and GTS-DI Inspecting the Burner Assemblies and Heat Exchanger Tubes 1.
MAINTENANCE Air Shutter Adjustment Procedure It is very important that each burner assembly ignite and burn with an orange (infrared) flame within 2 minutes of ignition. The air shutters have been factory set, but no ignition or a blue flame indicates that an air shutter adjustment is necessary per this procedure.* If, during regular maintenance or at any other time, it is found that a burner does not ignite or the burner flame is not orange, the following procedure must be used. 1.
REPLACEMENT PARTS Standard GTS® OM-842 Table 26-1: GTS Replacement Parts (STD) ITEM DESCRIPTION PART NUMBER ITEM DESCRIPTION Orifice, 1/4" NPT 160225-TAB 1 Tank 168000-TAB 2 Heat Exchanger 168001-TAB 24 Legs 165440-001 Blower, GTS-75, 100, 150, 300, 200, 400 400086 3 Gasket, Heat Exchanger 308012-TAB 25 4 Cover 167720-TAB 26 Temperature Sensor 405760 Plate, GTS-300 and 400 Sensor Support 128663 5 Gasket, Cover 160691-006 27 6 Knob, Cover 700725 27 Plate, GTS-75,100,150
REPLACEMENT PARTS GTS®-DI OM-843 Table 27-1: GTS Replacement Parts (DI) ITEM DESCRIPTION PART NUMBER ITEM 20 DESCRIPTION PART NUMBER Gasket, Burner Mtg.
WIRING DIAGRAM (Refer to as built diagram in the control cabinet) GTS® Wiring Schematic 28
WIRING DIAGRAM (Refer to as built diagram in the control cabinet) GTS® Wiring Schematic 29
WIRING DIAGRAM (Refer to as built diagram in the control cabinet) 30
WIRING DIAGRAM (Refer to as built diagram in the control cabinet) 31
FOR YOUR SAFETY READ BEFORE OPERATING ! If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. WARNING 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.
GAS CONTROL VALVE Figure 33-1: Gas Control Valve for GTS® 300, 150 and 75 Figure 33-2: Gas Control Valve for GTS® 400, 200 and 100 Outlet (manifold) Pressure Tap High Fine Pressure Gas Adjustment Outlet (manifold) Pressure Tap Normal Pressure (gas adjust under time delay) Pressure Adjustment Time delay Terminal Connections Terminals Terminals "ON", "OFF" Gas Control Knob "ON", "OFF" Gas Control Knob Inlet Pressure Tap Inlet Pressure Tap Top View OM-836 Top View OM-836A 33
MAINTENANCE SERVICE RECORD DATE INSPECTED 34 PERSONNEL OBSERVATION ACTION PERFORMED
MAINTENANCE SERVICE RECORD DATE INSPECTED PERSONNEL OBSERVATION ACTION PERFORMED 35
TWO-YEAR LIMITED WARRANTY DRI-STEEM Humidifier Company (“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.
