DRI-STEEM CRUV

1 READ AND SAVE THESE INSTRUCTIONSDRI-STEEMCRUV ELECTRIC STEAM HUMIDIFIERI nstallation InstructionsandMaintenance Operations ManualFor Toll-Free Customer Support,Call: 1-800-328-4447cETL LISTEDETL LISTED2 CRUV 4 Specifications, Capacities, and 6 Start-up and 9 Trouble-Shooting 10 Replacement 14 Maintenance Service 19 Two-Year Limited 20 TABLE OF CONTENTSTO THE PURCHASER AND THE INSTALLERT hank you for purchasing our CRU V humidification equipment. We have designed and built this equipment to giveyou total satisfaction and many years of trouble-free service. Proper installation and operating practices will assureyou of achieving that objective. We therefore urge you to become familiar with the contents of this Humidifier Company3 CRU V HUMIDIFIERF igure 3-2: The CRUV-DI Humidifier(CRUV-DI 6-25 shown, CRUV-DI 2, 4, 30, and 34 not shown)CRUV HumidifierThis humidifier is designed to be used with either soft-ened or unsoftened water (softened water will greatlyreduce humidifier maintenance and improve overallsystem performance).

2 The probe-type level controlsystem requires water conductivity of at least 100micromhos/cm (2 grains/gal or mg/1) to function, andtherefore, will not operate with demineralized water. Forhumidification using demineralized water, see 3-1: The CRU V Humidifier(CRUV 6-25 shown, CRUV 2, 4, 30, and 34 not shown)CoverHeater terminal coverSteam outletOverflow " SSTball valveWatersupplyCoverboltsFloat switchHeaterelementOM-770-2 CRUV-DI HumidifiersThe evaporating chamber of this humidifier isconstructed of corrosion-resistant stainless steel alloyto resist the corrosive effects of mineral-free the CRUV-DI humidifier is designed for use withdeionized or RO demineralized water, there is no need toclean the unit, although an annual inspection of theevaporating chamber is outletHeater terminal coverCoverboltsOverflowElectric drainHeaterelementFillvalveProbeStrainer OM-770-1 TanktemperaturesensorTank temperature sensor4 INSTALLATIONL ocate the CRU V humidifier near an electric powersource, water supply and a drain.

3 Verify that sufficientroom is provided for a water seal in the drain piping. Referto Figure an Air-Conditioning UnitWhen installing a humidifier inside an air conditioning unit,provide adequate support; allow easy access for removingand servicing the evaporating chamber, and provideadequate clearance to install the vapor hose and disper-sion tube (see figure 4-1) and water seal. Refer to page 6for mounting hole a DuctWhen installing the dispersion tube in a duct, allow for acontinuous pitch of the vapor hose back to the evaporatingchamber. Otherwise, use a water seal and drain (seeexamples in figures 4-2 and 5-1). The dispersion tube canalso be placed vertically in the duct with some models(see figure 5-2).Place the control cabinet or electrical sub-panel in agrounded protective metal enclosure and mount in a dryand accessible draining the evaporating chamber by gravity is notpossible, use a small condensate lift pump, rated to pump212 F/100 C of Installation in an Air StreamFigure 4-1: Installation in an Air-Conditioning UnitDuctHorizontal mounting of dispersion tube in a duct, connectedvia vapor hose to a wall-mounted CRU Series 4-2: Horizontal Dispersion TubeOM-2008 Vapor HoseFigure 4-3: Piping for the CRUVNote.

4 Provide 1"(25 mm) air gap toeliminate backsiphonageFloor drainSanitarysewerWater seal mustnot be abovebottom of frame12" (305 mm)OM-2003-15 INSTALLATIONP ipingWater make-up piping should be of corrosion-resistant,code-approved material (copper, steel, or plastic). Thefinal connection size is " NPT. In cases where waterhammer is possible, a shock arrestor should piping should be of code approved material(copper, steel, or plastic rated for 212 F/100 C minimum).The " copper sweat connection should not bereduced in size. (See figure 4-3).If there is no sewer available for drainage, the unit canbe piped for manual drainage. Consult factory for CRU V is designed for a single source of electricpower supply. Future tank removal will be easier if plugs orquick connects and extra long conduits are used toprovide electrical power to components from must meet all electrical codes, the current charac-teristics, and capacity requirements should be checkedagainst the nameplates.

5 The electrical subpanel should bemounted in a location convenient for service. Wiring mustbe in accordance with all governing codes, and with thehumidifier wiring diagram. The wiring diagram(s) areshipped loose with the unit. The wiring between the controlcabinet and humidifier must be rated at 105 C, 5-1: Horizontal Dispersion Tube Lower ThanHumidifierOM-774-1 Tee3"-5"(127 mm)Water SealWhen horizontally mounting the dispersion tube in an airstream that is located lower than the CRUV humidifier a waterseal (to prevent steam from escaping at the open drain) mustbe provided in the drain line and line extended to open drain,as shown, to drain the multiple dispersiontube bank must be used with a CRUV-30 or CRUV-34because of its high output (see figure 5-3).

6 Figure 5-2: Vertical Dispersion TubeOM-775-1 The dispersion tube can be mounted vertically in the : When dispersion tube is more than 10' (3 m) from unit,insulated, 1 " (38 mm) diameter minimum rigid tubing orpipe should be used instead of vapor applicationis not recommended for CRUV-10 through rapid absorption is extremely critical, a RAPID-SORBTM multiple-tube bank can provide 100% steam absorption withinthree feet or less - at any duct multiple tube orRAPID-SORB dispersion system is required for CRUV-30 complete information on calculating the number ofdispersion tubes required to satisfy steam absorptiondistance requirements, consult your sales representative,the DRI-STEEM factory, or use DRI-STEEM 's DRI-CALC Humidification Sizing and Selection 5-3: RAPID-SORBTM Rapid Absorption TubeBankOM-831-1 Caution.

7 Only qualified electrical personnelshould perform installation , CAPACITIES, AND DIMENSIONSO utput/hour(lbs /gal/kg)CRUV-2 CRUV-DI-2 CRUV-4 CRUV-DI-4 CRUV-6 CRUV-DI-6 CRUV-8 CRUV-DI-8 CRUV-10 CRUV-DI-10 CRUV-12 CRUV-DI-12 CRUV-14 CRUV-DI-14 CRUV-16 CRUV-DI-16 CRUV-21 CRUV-DI-21 CRUV-25 CRUV-DI-25 CRUV-30 CRUV-DI-30 CRUV-34 CRUV-DI-346/.7 wt.(lbs/kg)43/2044/2083/3883/38100/45100 /4585/39100/45113/51113/51117/53117/53 Shipping wt.(lbs/kg)*18/819/940/1840/1844/2044/20 37/1844/2047/2147/2151/2351/23 Amps 208v/1 ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** V Mechanical/Electrical SpecificationsEnd ElevationOM-2002 Table 7-2: CRUV Mechanical/Electrical Specifications and CapacitiesTop viewOM-2004 Side Elevation(CRUV 25, 30, 34)OM-759-1 Table 7-1: CRUV Dimensions (in inches)NOTE: Charts shown here can be used for CRUV-DI sizing.

8 * Add 9 lbs (4 kg) to total weight for models with pre-wired subpanel.** For wire sizing, highest leg draw is due to current unbalance in some cases.** Output capacity and kW derate of 7%.ledoMABCDEFGH4&2-ID- ,6-ID- ,52,12- AND OPERATIONLW415 Electronic Water Level Control ModuleWhen the power is activated, the solenoid-operated waterfill valve will open, filling the evaporating chamber. Fillingwill continue until water reaches level A (figure 8-1), atwhich time the fill valve will close. To ensure that a waterseal is created in the field-installed water seal, disconnectprobe plug and cable from probe rod assembly (locatedon the top of the tank), allowing the fill valve to re-energize and overfill humidifier tank.

9 This process willtake only seconds; probe plug and cable must then bereconnected. A call for humidity will then energize theheating RefillDuring operation, when the water line drops below level Bthe fill valve opens, and remains open until the water linereturns to level A (figure 8-1).Heater ProtectionShould the water line ever drop below level C, the heatersare de-energized and remain OFF until the water line hasbeen restored to level C. This feature provides heaterprotection in the event of a low-water FeatureThis control module contains an integral electronic timerwhich tracks the humidifying time of the unit. When thisaccumulated time reaches what has been set in thetimer, the drain/flush cycle is activation, the following sequence drain valve opens and begins to drain surfacewater and minerals from the evaporating the height of the water drops to the REFILL level, the fill valve drain and fill valves remain open for ten moreminutes, flushing the drain valve then closes, the chamber refills, andthe fill valve closes.

10 The timer resets and the unitresumes normal electronic timer comes factory-set for drainage after40 hours of operation. Alternate settings of 20 hours and80 hours are available. See wiring diagram(s) attached tounit for timer board location and instructions for changingthe timer and Checkout ProceduresAfter the system has been properly installed and con-nected to both electrical and water supplies, it may thenbe mounting to see that the unit is level and securelysupported before filling with water. Refer to page 6 formounting hole that all piping connections have been completed asrecommended and that water pressure is available. Referto page that all wiring connections have been made inaccordance with all governing codes and the enclosedwiring diagram.