READ AND SAVE THESE INSTRUCTIONS VAPORMIST and VAPORMIST DI ® ELECTRIC STEAM HUMIDIFIERS Installation, Operation and Maintenance Manual For toll-free technical support call 1-800-328-4447 ETL LISTED cETL LISTED
TABLE OF CONTENTS To the purchase and installer Thank you for purchasing our VAPORMIST® 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 VAPORMIST and VAPORMIST DI humidifiers. DRI-STEEM Humidifier Company VAPORMIST and VAPORMIST DI humidifiers ....
VAPORMIST® HUMIDIFIER Figure 3-1: VAPORMIST humidifier (standard water) The standard VAPORMIST unit requires water conductivity of at least 100 micromhos/centimeter (2 grains per gallon) to operate. It will not operate with water treated by reverse osmosis or deionization processes. (See DI model below.
INSTALLATION Locating and mounting the VAPORMIST® humidifier The VAPORMIST humidifier is designed to lag bolt to the wall, and it should be installed in a space located near an air duct system. Consider the following when selecting the location of the humidifier: • Convenient access to duct • Electrical and plumbing connections • Required clearances The mounting location should provide a minimum clearance of 36" (915 mm) to the front and 24" (610 mm) to the right side of the unit.
INSTALLATION Mounting dispersion tube without condensate drain Figure 5-1: Single-Tube 2.5" (65 mm) • Connection can be made to the humidifier with vapor hose or hard piping. • Hard piping should have a minimum I.D. of 1½" (DN40). • A minimum pitch of 2"/foot (15%) back to the humidifier should be maintained. • Short sweep 90° elbows are not recommended; use two 45° elbows 12" (300 mm) apart or long sweep 90° elbows instead.
PIPING AND WIRING Water makeup piping may be of any code-approved material (copper, steel, or plastic). The final connection size is 1/4" NPT (DN8). In cases where water hammer may be a possibility, a shock arrestor should be considered. Drain piping may be of any code-approved material (copper, steel, or plastic rated for 212 °F [100 °C] minimum). If drainage by gravity is not possible, a small lift pump should be used (DRI-STEEM part #400280).
ELECTRICAL SPECIFICATIONS, CAPACITIES, DIMENSIONS AND WEIGHTS Table 7-1: Electrical specifications, capacities and weights Model number Steam capacities per hour Current draw (amps) Weight kW Single-phase lbs kg VM-2 6 VM-4 VM-6 VM-8 24 VM-10 30 VM-12 36 VM-14 42 VM-16 VM-21 VM-25 VM-30 VM-34 Three-phase** Empty Full 120V 208V 3-wire* 230V *** 240V 3-wire* 480V 600V 208V 4-wire* 240V 400V 480V 600V lbs kg lbs kg 2.7 16.7 9.6 8.0 8.3 4.2 3.
AREA-TYPE APPLICATION USING SPACE DISTRIBUTION UNITS Space distribution units (SDUs) convert a VAPORMIST® duct humidifier into an area-type humidifier. Instead of the steam dispersion tube being located inside an air duct, the dispersion tube is built into a fan unit. A fan draws in room air and blows it across the dispersion tube, where it disperses moisture into the room.
AREA-TYPE APPLICATION USING SPACE DISTRIBUTION UNITS Figure 9-1: SDU-E mechanical detail 24.19" (614 mm) 16.10" (409 mm) Steam outlet 18.59" (472 mm) 10.81 (275 mm) Front view OM-54-1 2.25" (57 mm) Steam inlet Side view Field wiring is required to connect the SDU fan and air flow proving switch terminals to the respective VAPORMIST® electrical panel terminals. Refer to the external connections diagram in the package shipped with your unit.
START-UP AND OPERATION Introduction Control system start-up/checkout After the system has been properly installed and connected to both electrical and water supplies, it may then be started. 1. Confirm that proper grounding and an approved earth ground are provided. Start-up and checkout procedures 2. Confirm that the control signal being connected to the VAPOR-LOGIC3 system is compatible with the VAPOR-LOGIC3 program. Identify the VAPOR-LOGIC3 program code on the wiring diagram.
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 hours of operation and duty cycle, will determine your own unique maintenance schedule. Water quality makes a difference 1.
MAINTENANCE Standard water models (VAPORMIST, cont.) Off-season shut-down procedure 1. Switch off electrical power. 2. Remove enclosure. 3. Shut off water supply to makeup valve. 4. Drain evaporating chamber, and clean if necessary (see “To inspect and service” on previous page). • Disconnect the drain union on the back left corner of the frame. • Disconnect the steam supply hose from the top of the tank. • Lift the tank foot above the frame flange and slide the tank assembly forward to remove. 2.
VAPORMIST® TROUBLESHOOTING GUIDE 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.
VAPORMIST® DI TROUBLESHOOTING GUIDE 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 14 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, air flow switch, high limit humidistat, etc.
REPLACEMENT PARTS Table 15-1: Space Distribution Unit (SDU-E) No. 12 13 7 8 2 5 1 9 8 13 12 10 4 6 Qty. Part No. Cabinet base, VM99 1 2 Blower, SDU99 external assembly 1 409540-003 3 Frame, SDU external 1 165542 4 Dispersion chamber, SDU99 w/ 1½" out 1* 160445-001 4 Dispersion chamber, SDU99 w/ 2" out 1* 160445-002 5 Switch, air flow 1 406190 6 Tubing, 3/8" OD x .
REPLACEMENT PARTS 27 25 21 20 3 1 2 19 6 26 25 7 18 10 9 8 4 3/4" NPT frame drain (male) VM Model 5 13 Tank drain 34 35 Hole for fill tube 36 22 12 17 34 16 31 14 15 32 30 Tank drain 3/4" NPT (male) 11 16 15 25 33 37 24 20 11 VMDI Model 28 29 23 See tables on pages 17 and 18.
REPLACEMENT PARTS Table 17-1: VAPORMIST® (see drawing on Page 16) No. Description Qty. Part No.
REPLACEMENT PARTS Table 17-1 continued: VAPORMIST® (see drawing on page 16) No. Description Qty. Part No.
REPLACEMENT PARTS Table 19-1: VAPORMIST® subpanel with SSR OM-213-4 No. Description Qty. Part No.
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.
