Vapormist ® E le ctric-to-S te a m H umidifica tion S y ste m PR 0 DU C T C ATALOG ® Now with Vapor-logic 4 controller: • Web-enabled access ®l • Interoperability via Modbus or optional ® ® BACnet MS/TP or LonTalk
Ve r s a t i l i t y f o r f i n i s h e d s p a c e s The Vapormist humidifier is a compact, cabinet-style unit compatible with all water types (tap, softened, deionized, reverse osmosis) and numerous dispersion options. Installation is a snap — just attach the frame to a supporting structure and connect electrical and water services. Available matching Space Distribution Units disperse steam with no visible vapor trail, making Vapormist ideal for use in finished spaces.
Va p o r m i s t f e a t u r e s a n d b e n e f i t s Versatile • Uses tap, softened, or DI/RO water • Capacity from 6 to 102 lbs/hr (2.
Va p o r- l o g i c 4 c o n t r o l l e r Accurate, responsive control Keypad/display Room RH Mode The Vapor-logic4 controller provides accurate, responsive RH control. PID control tunes the system for maximum performance. Set point Tank water level Softkeys for direct menu access Steam output Tank status Navigation buttons for item selection System alarms System messages Modbus, BACnet MS/TP, or LonTalk allow interoperability with multiple building automation systems.
Va p o r m i s t p r i n c i p l e o f o p e r a t i o n Figure 5-1: Vapormist principle of operation Standard water system (shown with cover removed) 4 1 3 2 OM-2000 1. When the system is first activated, the fill valve opens and the evaporating chamber fills with water to the operating level. 2. On a call for humidity, the heating elements are energized, causing the water to boil. The fill valve opens and closes as needed to maintain the operating water level. 3.
Va p o r m i s t c o m p o n e n t s Figure 6-1: Vapor-logic4 keypad/display Figure 6-2: Vapormist components 5 6 4 7 2 3 1 OM-402-2 1. Vapor-logic4 controller Vapor-logic4 controls all humidifier functions and can connect to a building automation system via Modbus or optional BACnet MS/TP or LonTalk. See Page 4 for more information. 2. Water level control Tap or softened water systems control water levels electronically using a three-rod probe (Figure 7-1).
Va p o r m i s t c o m p o n e n t s 4. Water skimmer/overflow port In standard water systems, the water skimmer reduces surface minerals in the evaporating chamber. Skimming occurs each time the humidifier fills. The skim time duration is useradjustable. Figure 7-1: Water level control for standard-water humidifier DI/RO water systems do not require skimming. In DI/RO systems, the skimmer port functions as an overflow port. Fill valve closes when water level rises to this probe. 5.
Va p o r m i s t s p e c i f i c a t i o n s Table 8-1: Vapormist capacities, electrical specifications, and weights Model Current draw (amps) Maximum steam capacity Weights ‡ Single-phase Three-phase Shipping Operating kW lbs/hr kg/h 120V 208V* 240V* 277V 480V† 600V† 208V* 240V† 277V 480V† 600V† lbs kg lbs kg VM-2 6 2.7 16.7 9.6 8.3 7.2 4.2 3.3 — — — — — 80 36 95 43 VM-4 12 5.4 33.3 19.2 16.7 14.4 8.3 6.7 16.7** 14.4** 12.5 7.2** 5.
Va p o r m i s t d i m e n s i o n s Figure 9-1: Vapormist dimensions 24.2" (614 mm) Top view 2" (50 mm) 2" (50 mm) 1" (25 mm) 10.9" (276 mm) 2.25" (57 mm) Power wiring knockout Steam outlet Control or SDU wiring knockout Venting Left side view Front view 18.6" (472 mm) 1.50" (38 mm) 2.25" (57 mm) ¾" pipe thread (DN20) frame drain 5.75" (146 mm) 16.1" (409 mm) ¾" pipe thread (DN20) tank drain Bottom view 0.50" (13 mm) hole in base for water fill line 0.75" (19 mm) 0.63" (16 mm) 2.
Va p o r m i s t p i p i n g : Standard water Figure 10-1: Vapormist (standard water) field piping overview Steam vapor hose (maximum run 10' [3 m]). May also use pipe or tubing. See the DRI-STEEM Design Guide for maximum pipe or tubing lengths. Water supply line: • ¼" NPT (DN8) connection size • 25 to 80 psi (175 to 550 kPa) required water pressure. • 100 μS/cm minimum water conductivity.
Va p o r m i s t p i p i n g : DI/RO water Figure 11-1: Vapormist (DI/RO water) field piping overview Steam vapor hose (maximum run 10' [3 m]). May also use pipe or tubing. See the DRI-STEEM Design Guide for maximum pipe or tubing lengths. Water supply line: • ¼" NPT (DN8) connection size • 25 to 80 psi (175 to 550 kPa) required water pressure.
Drip-free dispersion basics Guaranteed non-wetting distances Figure 12-1: DRI-STEEM dispersion tubes Using data collected in our on-site test lab, we have developed guaranteed steam absorption (non-wetting) distances. Performance charts allow you to confidently choose equipment that will accommodate any application. Dry steam DRI-STEEM’s dispersion tubes are fitted with one or two rows of closely-spaced thermalresin tubelets to evenly disperse steam across the airstream.
Va p o r m i s t s t e a m d i s p e r s i o n o p t i o n s Ultra-sorb® Figure 13-1: Ultra-sorb dispersion • Double-header design • Shortest non-wetting distance; install within inches of upstream dampers, coils, or elbows without dripping • Steam capacity up to 1,850 lbs/hr (839 kg/h) • Factory assembled for easy installation • High-efficiency tube option OM-636-1 Rapid-sorb® • • • • • Figure 13-2: Rapid-sorb dispersion Single-header design Short non-wetting distance Steam capacity up to 800 lbs/hr
Calculating non-wetting distances Guaranteed absorption Sample exercise • Cataloged and guaranteed steam absorption distances Read through this exercise to learn more about specifying a dispersion unit based on non-wetting distance. Assume you have chosen to use Ultra-sorb units because you want pre-assembled panels.
Dispersion: Ultra-sorb Figure 15-1: Ultra-sorb non-wetting distances 3" 6" 9" 12" Note: The above data apply to all air velocities up to 1,500 fpm (7.6 m/s), and are based on air leaving the zone of humidification at conditions of 55 °F (13 °C) and the stated % RH. The blue lines in the graph refer to the sample exercise described on Page 14.
Dispersion: Ultra-sorb Ultra-sorb LV Figure 16-1: Ultra-sorb LV dimensions • Vertical dispersion tubes • Suitable for AHUs or ductwork • Use when duct height is greater than duct width A' G • May use with pressurized or evaporative steam (horizontal airflow only) Supply header Dispersion tubes For Ultra-sorb Model LH (horizontal tubes), see the Ultra-sorb Steam Dispersion Panels Product Catalog (available at www.dristeem.com).
Dispersion: Rapid-sorb Figure 17-1: Rapid-sorb non-wetting distances 90 LEAVING % RH 80 70 60 50 40 0 0 10 20 30 40 50 60 70 80 90 6” ENTERING % RH 9” 12” 18” 24” DISPERSION TUBE SPACING Note: The above data apply to all air velocities up to 1,500 fpm (7.6 m/s) and are based on air leaving the zone of humidification at 55 °F (13 °C) and the stated % RH.
Dispersion: Rapid-sorb Figure 18-1: Rapid-sorb dimensions A E 1½" (DN40) dia. dispersion tubes use slip coupling B 2" (DN50) dia. dispersion tubes use hose cuff and clamps Header outside duct C Pitch header toward drain Escutcheon plate F Header inside duct or AHU D OM-3005 Note: Add water seal to condensate drain as shown in the Dri-calc Installation Guides or the humidifier's Installation, Operation and Maintenance manual.
Dispersion: Single tube Figure 19-1: Single tube non-wetting distances Table 19-1: Single tube capacities Maximum capacity of dispersion tube NON-WETTING DISTANCE IN INCHES Tube size 90 Without drain LEAVING % RH 80 70 With drain inches DN lbs/hr kg/h lbs/hr kg/h 1½ 40 28.4 13 56.8 25.8 2 50 56.8 25.8 85.2 38.
Dispersion: SDU DRI-STEEM's SDUs match the Vapormist cabinet SDU-I (Space Distribution Unit Internal Absorption) disperses steam without a visible vapor trail. This option is ideal for spaces where the presence of vapor creates either a visual problem or a condensation risk. For larger capacities, choose the SDU-E (Space Distribution Unit External Absorption). Both SDU models offer extremely quiet, reliable steam distribution. Note: SDUs ship separate from the Vapormist.
Dispersion: SDU Figure 21-1: Wall-mounted Vapormist and SDU-I Keyhole for 3/8" dia. (M10) fasteners 16" (406 mm) SDU chassis 3" (76 mm) 18.02" (458 mm) 17.75" (451 mm) 16" (406 mm) 0.25" (6.4 mm) 3" (76 mm) Keyhole for 3/8" dia. (M10) fasteners 18.50" (470 mm) Vapormist chassis 24" (610 mm) OM-282-4 Figure 21-2: Wall-mounted Vapormist with SDU-E Keyhole for 3/8" dia. (M10) fasteners 16" (406 mm) SDU chassis 3" (76 mm) 16" (406 mm) 18.
Dispersion: SDU As steam is discharged from the SDU-E, it quickly cools and turns to a visible fog that is lighter than air. As this fog is carried away from the SDU-E 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. The greater the space relative humidity, the more the fog will rise, throw and spread.
Dispersion: SDU Table 23-1: SDU specifications** Maximum capacity Figure 23-4: SDU-E drain line piping Shipping weight lbs/hr kg/h lbs kg Amps at 120V (50/60 Hz) SDU-E 102 46.3 61 28 2.07 1/8 545 0.26 64 SDU-I 30 13.6 68 31 3.20 1/5 760 0.36 58 SDU model Horsepower cfm m3/s dB* * Measurement taken 6.5' (2 m) in front of SDU cabinet. ** For visible vapor to be absorbed completely within the SDU-I unit before being discharged as humidified air, room air must be 45% RH or less.
Conserving resources through better performance Expect quality from the industry leader For more than 45 years, DRI-STEEM has been leading the industry with creative and reliable humidification solutions. Our focus on quality is evident in the construction of the Vapormist humidifier, which features cleanable, stainless steel construction. DRI-STEEM also leads the industry with a Two-year Limited Warranty and optional extended warranty. For more information www.dristeem.com sales@dristeem.
