READ AND SAVE THESE INSTRUCTIONS ® HUMIDI-TECH and HUMIDI-TECH DI ELECTRIC STEAM HUMIDIFIERS Installation, Operation and Maintenance Manual
TABLE OF CONTENTS To the purchaser and installer Thank you for purchasing our HUMIDI-TECH® humidifier. We have designed and built this equipment to give you complete satisfaction and trouble-free service for many years. Familiarizing yourself with this manual will help ensure proper operation of the equipment for years to come. This manual covers the installation and maintenance procedures for both the HUMIDI-TECH and HUMIDI-TECH DI humidifiers.
HUMIDI-TECH® HUMIDIFIER Figure 3-1: HUMIDI-TECH humidifier The standard HUMIDI-TECH unit requires water conductivity of at least 100 µS/cm to operate. It will not Electrical operate with water treated connections by reverse osmosis or DN40 or DN50 flexible deionization processes. vapor hose connects to (See DI model below.
SPECIFICATIONS Table 4-1: Electrical specifications, capacities and weights Model number Steam capacity per hour kg/h I max. A Singlephase Threephase 230V*** 400V Shipping weight† Operating weight† kg kg kW VM-2 2.7 8.0 -- 2 26 37 VM-4 5.4 16.0 8.7** 4 26 38 VM-6 8.2 24.0 13.0** 6 36 55 VM-8 10.9 31.9 17.3** 8 36 55 VM-10 13.6 39.9 15.2** 10 38 63 VM-12 16.3 47.9 17.3 12 38 63 VM-14 19.1 -- 20.2 14 38 63 VM-16 21.8 -- 23.
MOUNTING THE HUMIDI-TECH® Locating and mounting the HUMIDI-TECH humidifier The HUMIDI-TECH humidifier is designed to lag bolt to the wall, and it should be installed in a space located near an air duct system.
PIPING Water make up piping may be of any codeapproved material (copper, steel, or plastic). The final connection size is DN6 (1/4"). In cases where water hammer may be a possibility, a shock arrestor should be considered water pressure must be between 170 kPa and 582 kPa. Drain piping may be of any code-approved material (copper, steel, or plastic rated for 100 °C minimum). If drainage by gravity is not possible, a small lift pump should be used (DRI-STEEM Part No. 400280).
WIRING All wiring must be in accordance with all governing codes, and with the HUMIDI-TECH® or HUMIDITECH DI wiring diagram. The diagram is located inside the removable subpanel cover on the righthand side of the humidifier cabinet. Power supply wiring must be rated for 105 °C. Refer to the amp draw on the rating plate, and use the following tables to determine the appropriate wire, conduit and fused disconnect requirements.
DISPERSION USING SPACE DISTRIBUTION UNITS SDU-I: Provides instant, internal absorption The Space Distribution Unit Internal Absorption (SDU-I) disperses humidity with no visible vapor trail or wetness, making the HUMIDI-TECH® with an SDU-I ideal for use in finished spaces. When room RH is 40% or less, the SDU-I fan mixes room air and steam to ensure complete absorption before discharge as humidified air. The SDU-I is available for models VM-2 through VM-10.
DISPERSION USING SPACE DISTRIBUTION UNITS Figure 9-1: SDU-E mechanical detail 614 mm Steam outlet 472 mm Side view Front view 276 mm Steam inlet 57 mm OM-54-1 Field wiring is required to connect the SDU fan and airflow proving switch terminals to the respective HUMIDI-TECH® electrical panel terminals. Refer to the external connections diagram in the package shipped with your unit.
SPACE DISTRIBUTION UNIT, EXTERNAL ABSORPTION (SDU-E) Rise, throw and spread (SDU-E) As steam is discharged from the humidifier, it quickly cools and turns to a visible fog that is lighter than air. As this fog is carried away from the humidifier by the airstream, it tends to rise toward the ceiling. If this fog contacts solid surfaces (columns, beams, ceiling, pipes, etc.) before it disappears, it could collect and drip as water.
DISPERSION USING DISPERSION TUBES Examples of mounting a dispersion tube Figure 11-1: Mounted horizontally in duct Figure 11-3: Mounted vertically Vapor hose OM-228-1 Vapor hose and dispersion tube should be pitched back to the humidifier with a gradual slope of 15%. A single dispersion tube cannot be used with VM-30 or VM-34. OM-230-1 This is not recommended on models VM-10 through VM-34.
DISPERSION USING DISPERSION TUBES Mounting dispersion tube without condensate drain • • • • • • • • Figure 12-1: Single-Tube Orient dispersion tubes so that tubelets point up. Connection can be made to the humidifier with 85 mm vapor hose or hard piping. Hard piping should have a minimum 85 mm I.D. of DN40 (1½") . Maintain a minimum pitch of 15% back to the humidifier should be maintained. Short-sweep 90° elbows are not recommended; 3.
START-UP AND OPERATION Introduction After the system has been properly installed and connected to both electrical and water supplies, it may be started. Start-up and checkout procedures Mounting Check mounting verify that the unit is level and securely supported before filling with water. Piping Verify that all piping connections have been completed as recommended and that water pressure is available. • Standard makeup water piping (HUMIDI-TECH) Use cold or hot make up water.
START-UP AND OPERATION Control system start-up/checkout 1. Confirm that proper grounding and an approved earth ground are provided. 2. Confirm that the control signal connected to the VAPOR-LOGIC®3 system is compatible with the VAPOR-LOGIC3 program. Identify the VAPOR-LOGIC3 program code on the wiring diagram. Refer to the VAPOR-LOGIC3 manual to decipher the code using the nomenclature description. 3. Confirm all wiring is correct per wiring diagram. 4.
MAINTENANCE The best way to determine how often your particular system will need maintenance is to remove the cover and inspect it after its first 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 1.
MAINTENANCE Standard water models (HUMIDI-TECH®, continued) 2. Loosen the four cover bolts and remove the cover assembly from the tank. 3. Clean the tank interior using a putty knife or similar flat instrument. 4. Unplug probe plug assembly. Leave ground wire connected to tank. Unscrew the probe rod assembly and clean the plastic probe housing, ensuring that all passageways are clear. Clean the probe rods using steel wool or a similar mild abrasive material.
MAINTENANCE DI water models (HUMIDI-TECH® DI) The HUMIDI-TECH DI unit uses DI/RO water. Because these water types are mineral-free, cleaning the evaporator chamber should not be necessary. However, there are some maintenance steps that should be followed to ensure all parts of the unit are in working order To inspect and service 1. Remove the evaporating chamber. • Remove the two fasteners on each side of the cover enclosure. • Remove the enclosure.
HUMIDI-TECH® (STANDARD WATER )TROUBLE SHOOTING PROBLEM POSSIBLE CAUSE RECOMMENDED ACTION Incorrect or nonexistent supply voltage to unit Check main line safety switch. Check main line fuses. Check for proper supply voltage. Incorrect or nonexistent control voltage Reset control transformer circuit breaker. Check for 24 VAC control circuit voltage at T-1 and T-2 on the control board. Humidistat not calling Set humidistat to call. Inspect for faulty humidistat. Safety controls open.
HUMIDI-TECH® DI TROUBLESHOOTING PROBLEM Humidifier will not heat. Humidifier will not fill. Humidifier does not stop filling. Reduced or no output even though water is at the proper level POSSIBLE CAUSE RECOMMENDED ACTION Control transformer Reset control transformer circuit breaker. Humidistat is not calling Set humidistat to call. Inspect for faulty humidistat. Safety controls open Check safety controls, airflow switch, high limit humidistat, etc. Low water cutoff Check at board 32 and 33.
REPLACEMENT PARTS HUMIDI-TECH® standard water model 3/4" NPT frame drain (male) Tank drain Hole for fill tube Tank drain 3/4" NPT (male) HUMIDI-TECH DI model OM-778-1 Note: Refer to the tables on the next page for replacement part numbers.
REPLACEMENT PARTS Table 21-1: HUMIDI-TECH® replacement parts (refer to the drawing on previous page) No. 1 Description Head bolt, large Phillips, ¼ - 20 X 1" Qty. Part No. No. Description Qty. Part No.
REPLACEMENT PARTS Figure & Table 22-1: Space Distribution Unit (SDU-E) No. Description Figure & Table 22-2: HUMDI-TECH® subpanel with SDU-E 22 Qty. Part. No.
REPLACEMENT PARTS Figure & Table 23-1: HUMIDI-TECH® subpanel with SCR No. Description Qty. Part. No. 1 Subpanel, VM99 Barrier 1 120801 2 Din Rail, 10.75" Long 2 167765-0107 3 Din Rail, 2.25 Long 1 167765-0022 4 Ground Lug, L-35 10-14 GA CP-8 2 409250-017 4 Ground Lug, L-70 6-8 GA CP-4 2 409250-018 5 Block, Din Rail Stop 5 408252-006 6 Transformer 230/400V 1 408996-007 7 Breaker, 4AM 1 Pole 1 406775-002 8 Breaker, 1.
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 twentyseven (27) months from the date DRI-STEEM ships such product, whichever date is the earlier.
