DriSteem CRUV User manual

READ AND SAVE THESE INSTRUCTIONS
DRI-STEEM
CRUV
ELECTRIC STEAM HUMIDIFIER
Installation Instructions
and
Maintenance Operations Manual
For Toll-Free Customer Support,
Call: 1-800-328-4447
cETL LISTEDETL LISTED
TM

2
CRUVHumidifier......................................................................... 3
Installation .................................................................................. 4
Specifications,Capacities,andDimensions ............................ 6
Start-upandOperation ............................................................... 8
Maintenance ................................................................................ 9
Trouble-ShootingGuide............................................................. 10
ReplacementParts ...................................................................... 14
MaintenanceServiceRecord ..................................................... 19
Two-YearLimitedWarranty........................................................ 20
TABLE OF CONTENTS
TO THE PURCHASER AND THE INSTALLER
Thank you for purchasing our CRUVTM humidification 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-STEEMHumidifierCompany

3
CRUVTM HUMIDIFIER
Figure 3-2: The CRUV-DI Humidifier
(CRUV-DI 6-25 shown, CRUV-DI 2, 4, 30, and 34 not shown)
CRUVHumidifier
This humidifier is designed to be used with either soft-
enedorunsoftenedwater(softenedwaterwillgreatly
reducehumidifiermaintenanceandimproveoverall
systemperformance).The probe-typelevelcontrol
system requires water conductivity of at least 100
micromhos/cm (2 grains/gal or 34.2 mg/liter) to function,
andtherefore,willnotoperatewithdemineralizedwater.
Forhumidificationusingdemineralizedwater,see
CRUV-DIbelow.
Figure 3-1: The CRUV Humidifier
(CRUV 6-25 shown, CRUV 2, 4, 30, and 34 not shown)
Cover
Heater terminal cover
Steam outlet
Over
flow
½" SST
ball valve
Water
supply Cover
bolts
Float switch
Heater
element
OM-770-2
CRUV-DIHumidifiers
The evaporating chamber of this humidifier is
constructed of corrosion-resistant stainless steel alloy
to resist the corrosive effects of mineral-free water.
Since the CRUV-DI humidifier is designed for use with
deionizedor RO demineralized water, there is noneed to
clean the unit, although an annual inspection of the
evaporatingchamberisrecommended.
Cover
Steam outlet Heater terminal cover
Cover
bolts
Over
flow
Electric drain
Heater
element
Fill
valve
Probe
Strainer
OM-770-1
Tank
temperature
sensor
Tank temperature sensor

4
INSTALLATION
Locatethe CRUVTM humidifiernear an electricpower
source, water supply and a drain. Verify that sufficient
room is provided for a water seal in the drain piping. Refer
toFigure4-3.
In an Air-Conditioning Unit
Wheninstalling a humidifier inside an air conditioning unit,
provideadequatesupport;allow easy access for removing
andservicingtheevaporatingchamber,andprovide
adequateclearanceto install the vapor hose and disper-
sion tube (see figure 4-1) and water seal. Refer to page 6
formountinghole locations.
In a Duct
When installing the dispersion tube in a duct, allow for a
continuous pitch of the vapor hose back to the evaporating
chamber. Otherwise, use a water seal and drain (see
examples in figures 4-2 and 5-1). The dispersion tube can
also be placed vertically in the duct with some models
(seefigure5-2).
Place the control cabinet or electrical sub-panel in a
groundedprotectivemetalenclosure and mount in a dry
and accessible location.
If draining the evaporating chamber by gravity is not
possible, use a small condensate lift pump, rated to pump
212°F/100°Cwater.
Examples of Installation in an Air Stream
Figure 4-1: Installation in an Air-Conditioning Unit
Duct
Horizontal mounting of dispersion tube in a duct, connected
via vapor hose to a wall-mounted CRUV humidifier.
OM-2006
Figure 4-2: Horizontal Dispersion Tube
OM-2008
Vapor Hose
Figure 4-3: Piping for the CRUV
Note: provide 1"
(25 mm) air gap to
eliminate back
siphonage
Floor drain
Sanitary
sewer
Water seal must
not be above
bottom of frame
12" (305 mm)
OM-2003-1

5
INSTALLATION
Piping
Watermake-uppipingshouldbeofcorrosion-resistant,
code-approvedmaterial(copper,steel,orplastic).The
final connection size is ¼" NPT. In cases where water
hammer is possible, a shock arrestor should be
considered.
Drainpipingshouldbeofcodeapprovedmaterial
(copper,steel, or plasticratedfor212°F/100°C minimum).
The ¾" O.D. copper sweat connection should not be
reducedin size. (See figure 4-3).
If there is no sewer available for drainage, the unit can
bepipedformanualdrainage.Consult factory for instruc-
tions.
Wiring
The CRUVTM is designed for a single source of electric
power supply. Future tank removal will be easier if plugs or
quick connects and extra long conduits are used to
provideelectricalpower tocomponentsfromsubpanel.
Wiring must meet all electrical codes, the current charac-
teristics, and capacity requirements should be checked
againstthenameplates.Theelectricalsubpanelshouldbe
mounted in a location convenient for service. Wiring must
be in accordance with all governing codes, and with the
humidifierwiringdiagram.Thewiringdiagram(s)are
shipped loose with the unit. The wiring between the control
cabinet and humidifier must be rated at 105°C, 600V.
Figure 5-1: Horizontal Dispersion Tube Lower Than
Humidifier
OM-774-1
Tee
8"
(200 mm)
Water Seal
When horizontally mounting the dispersion tube in an air
stream that is located lower than the CRUV humidifier a water
seal (to prevent steam from escaping at the open drain) must
be provided in the drain line and line extended to open drain,
as shown, to drain the condensate. A multiple dispersion
tube bank must be used with a CRUV-30 or CRUV-34
because of its high output (see figure 5-3).
Figure 5-2: Vertical Dispersion Tube
OM-775-1
The dispersion tube can be mounted vertically in the duct.
Note: When dispersion tube is more than 10' (3 m) from unit,
insulated, 1½" (38 mm) diameter minimum rigid tubing or
pipe should be used instead of vapor hose. This application
is not recommended for CRUV-10 through CRUV-34.
When rapid absorption is extremely critical, a RAPID-SORB
multiple-tube bank can provide 100% steam absorption within
three feet or less - at any duct temperature. A multiple tube or
RAPID-SORB dispersion system is required for CRUV-30 or
CRUV-34.
Forcompleteinformationoncalculatingthe number of
dispersion tubes required to satisfy steam absorption
distancerequirements, consult yoursalesrepresentative,
theDRI-STEEM factory, or use DRI-STEEM's DRI-CALC®
HumidificationSizingand Selection Software.
Duct
Duct
Duct
Figure5-3: RAPID-SORB®RapidAbsorptionTube
Bank
OM-831-1
Caution: Only qualified electrical personnel
should perform installation procedures.
6" (152 mm)

6
SPECIFICATIONS, CAPACITIES, AND DIMENSIONS
CRUVTM Mechanical/ElectricalSpecifications
End Elevation
OM-2002
Table6-2:CRUVMechanical/ElectricalSpecificationsandCapacities
Topview
OM-2004
Side Elevation
(CRUV 25, 30, 34)
OM-759-1
Table6-1:CRUVDimensions(ininches)
NOTE: Charts shown here can be used for CRUV-DI sizing.
* 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%.
C
G
4.25
F
E
A
DF
A
15.0
G 4.25
H
0.250
ledoMABCDEFGH
4&2-ID-VURC/VURC .ni53.4105.5100.988.705.1144.1183.26.6
mm46349392200229219233.067.761
01&8,6-ID-VURC/VURC .ni53.4100.6183.4188.888.6149.2150.53.9
mm46360456352292492372.8212.632
61&21-ID-VURC/VURC .ni53.4100.6183.4186.0188.6157.4150.53.9
mm46360456317292457372.8212.632
43&03,52,12-ID-VURC/VURC .ni53.4100.6183.4152.2188.6152.6150.53.9
mm46360456311392431472.8212.632
ruoh/tuptuO
)gk/lag/sbl(
2-VURC
2-ID-VURC 4-VURC 4-ID-VURC 6-VURC 6-ID-VURC 8-VURC 8-ID-VURC 01-VURC 01-ID-VURC 21-VURC 21-ID-VURC 41-VURC 41-ID-VURC 61-VURC 61-ID-VURC 12-VURC 12-ID-VURC 52-VURC 52-ID-VURC 03-VURC 03-ID-VURC 43-VURC 43-ID-VURC
7.2/7./64.5/4.1/212.8/2.2/819.01/9.2/426.31/6.3/034.61/4.4/631.91/5/248.12/8.5/840.92/7.7/360.43/0.9/574.14/9.01/093.64/2.21/201
.twgnitarepO
)gk/sbl(
02/3402/4483/3883/3854/00154/00193/5854/00115/31115/31135/71135/711
.twgnippihS
*)gk/sbl( 8/819/9181/0481/0402/4402/4481/7302/4412/7412/7432/1532/15
:taspmA
ø1/v021 7.61 -----------
ø1/v802 6.92.918.825.83 --------
***ø1/v032 0.80.610.429.139.93 -------
ø1/v042 3.87.610.523.337.14 -------
ø1/v084 2.43.85.217.618.020.522.923.338.34 ---
ø1/v006 3.37.60.013.317.610.023.327.620.537.14--
ø3/v802 -**7.61**0.52**3.33**1.923.339.834.44 ----
ø3/v042 -**4.41**7.12**9.82**3.529.827.335.83 ----
ø3/v004 -**7.8**0.31**3.71**2.513.712.021.323.031.633.34-
ø3/v084 -**2.7**8.01**4.41**6.214.418.612.913.521.031.639.04
ø3/v006 -**8.5**7.8**5.11**1.015.115.314.512.021.429.827.23
Wk0.20.40.60.80.010.21410.610.120.520.030.43

7
START-UP AND OPERATION
LW417 Electronic Water Level Control Module
Whenthepowerisactivated,thesolenoid-operatedwater
fill valve will open, filling the evaporating chamber. Filling
will continue until water reaches level A (figure 8-1), at
which time the fill valve will close. To ensure that a water
seal is created in the field-installed water seal, disconnect
probeplug andcablefrom proberod assembly(located
on the top of the tank), allowing the fill valve to re-
energize and overfill humidifier tank. This process will
take only seconds; probe plug and cable must then be
reconnected. A call for humidity will then energize the
heatingelement.
WaterRefill
Duringoperation, when the water linedropsbelowlevel B
the fill valve opens, and remains open until the water line
returns to level A (figure 7-1).
HeaterProtection
Should the water line ever drop below level C, the heaters
arede-energizedand remain OFF until the waterlinehas
been restored to level C. This feature provides heater
protection in the event of a low-water condition.
Drain/FlushFeature
This control module contains an integral electronic timer
which tracks the humidifying time of the unit. When this
accumulated time reaches what has been set in the
timer, the drain/flush cycle is activated.
Upon activation, the following sequence occurs:
1. The drain valve opens and begins to drain surface
waterandmineralsfromtheevaporatingchamber.
2. When the height of the water drops below level "C",
this will allow the flush cycle to start.
3. Once the flush period starts the drain and fill valves
willremain open 1-3 minutes, flushing the chamber.
4. After 10 minute Drain/Flush feature, the drain valve
then closes, the chamber refills, and the fill valve
closes. The timer resets and the unit resumes normal
operation.
The electronic timer comes factory-set for drainage after
40 hours of operation. Alternate settings of 20 hours and
80 hours are available. See wiring diagram(s) attached to
unit for timer board location and instructions for changing
the timer setting.
Start-up and Checkout Procedures
After the system has been properly installed and con-
nected to both electrical and water supplies, it may then
be started.
Mounting
Check mounting to see that the unit is level and securely
supported before filling with water. Refer to page 6 for
mountingholelocations.
Piping
Verify that all piping connections have been completed as
recommendedandthatwater pressureis available.Refer
to page 5.
Electrical
Verify that all wiring connections have been made in
accordancewithall governing codes and the enclosed
wiringdiagram. Refertopage 5.
Caution: Only qualified personnel should
perform start-up procedure.
A simple three-probe conductivity sensor cycles a
solenoid-operatedwater fillvalve tomaintainthe proper
water levels.
The CRUVTM humidifier is available with either the
standardLW417ElectronicWaterLevelControlModule
ortheoptionalVAPOR-LOGIC®3microprocessorcontrol
system. If your system is equipped with the
VAPOR-LOGIC3system,see the VAPOR-LOGIC
3
OperationsandMaintenanceManual formoreinformation.
Thencontinue readingthis manualbeginningat the
maintenancesection on page 9.
OM-211-2
Figure7-1: Electronic
ProbeControl for
MaintainingProper
WaterLevel(CRUVTM)
A
B
C

8
e) Check function of field-installed safety controls,
such as the fan proving switch. Contactor(s) should
drop out when the proving switch is "open."
f) Checkheaterdrawby testingandrecordingvoltage
andamperageineachphase.Readingsshould
match name plate readings; name plate is located on
thehumidifierhousing.
g) Inspect installations for steam or air leaks while
operating the humidifier. Any leaks should be
sealed.
Inspect after first three months of duty. The best way to
determinehow 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
determineyourownuniquemaintenanceschedule.
Waterqualitymakesadifference
1. Lightto moderatelyhardwater(2 to 10 grains/gallon
or 34.2 to 171 mg/1 hardness)
• annualcleaning
2. Highmineralcontent water(morethan 10grains/
gallonor171mg/1hardness)
• cleaningfrequencydetermined byuseandwater
quality
• periodic drain and flush cycles
3. DI/ROwater(ModelVMDI)
• noregularcleaningrequired(althoughregular
inspectionsareadvised)
• no drain and flush cycles required
• the presence of chlorides in DI water will
eventually cause pitting and failure of the tank
and its components
4. Todramaticallyreducemineralaccumulationinside
theevaporating chamber,softeningof themakeup water
recommended. (Solids like silica are not removed in the
thesofteningprocess.)
START-UP AND OPERATION
TestCyclingtheDrain/FlushSystem
The level control board incorporates a set of slide
switches which are marked 1 through 8. To test:
1. Place "SWI" slide switches 1,2 and 3 to off position.
2. Set the humidistat high enough so that unit will remain
“on call” for at least 15 minutes.
3. After about 2 minutes of operation, activation will
take place, causing the drain valve to open. The
water level will then drop to level C (see figure 7-1 on
page 7) and allow the fill valve to open. Both valves
willremain open for the remainder of Auto/Flush period.
4. The drain valve will then close, and the water level
will rise to level A (see figure 7-1 on page 7), causing
the fill valve to close.
5. Once the test cycle is complete, return slide switches
back to the desired operating mode. Failure to do so
will result in a drain/flush cycle every 2 minutes.
CRUVTM Make-up Water Piping
If the water pressure is above 60 psi (414 kPa) and/or
waterhammerwouldbeobjectionable,apressure-
reducing valve or shock arrester should be installed.
Even though the humidifier has an internal 1" (25 mm) air
gap, some local codes may require a vacuum breaker.
Important: Minimumwatersupply pressure is 25 psi (170
kPa). Maximum water supply pressure is 80 psi (552 kPa).
CRUV-DI Water Level Control System
The basic float valve water level system and float switch
circuit for heater protection in the event of a low-water
condition is common to all DI humidifiers and can be
found in the wiring diagram shipped with the unit.
CRUV-DI Start-Up Procedure
a) Adjust humidistat to "call" setting.
b) Open shut-off valve on water supply line. Unit should
begin filling with water through the fill valve.
c) Shortly before the fill valve shuts off, the float
operated heater cut-off switch will "make." When
this switch makes, the heating element contactor(s)
will be actuated. A time delay relay circuit prevents
contactor chatter due to bouncing of heater cut-off
float.
d) Check heater cut-off circuit.
1. Close manual valve on water supply.
2. Open drain valve and start draining unit.
3. When water level drops past switching level on
the heater cut-off float, the heating element
contactor(s) will drop out.
4. When step 3 has been satisfactorily completed,
close drain valve.

9
MAINTENANCE
CRUVTM Humidifier
(Non-DI humidifiers with either the LW 417 or
VAPOR-LOGIC®3ControlSystems)
MineralPrecipitate
As evaporation takes place in the CRUV humidifier, some
of the minerals dissolved in the water precipitate out and
float on the water surface. The minerals not removed by
the skimmer will settle to the bottom of the evaporating
chamber.
CleaningtheEvaporatingChamber
The heating element itself is self-cleaning. The mineral
buildup on the element flakes off after reaching a thick-
ness of about 1/16" (2 mm), and settles to the bottom of
thechamber.
Longheater element life can be expected when the
operation of the humidifier is observed for a few weeks
followinginitialstart-up. By observing the mineral build-up
rate, the frequency of both drain/flush use and manual
cleaningcanbe determinedandadjustmentsmade.
CAUTION: Before this mineral scale builds up on the
underside of the heating element, it must be removed.
Failure to do so may result in premature heater burn-
out.
TheCRUV humidifierisdesigned forconvenient cleaning
andmaintenance.
ToInspectand Service:
1. Shut off all eletrical power to humidifier. Drain
evaporatingchamberbymanuallyopeningDRAIN
valve. Do this by moving lever on valve to MANUAL
position and lock in place. If the tank is hot, cool it
down by opening the manual valve on the side of the
tank. The float valve will open allowing cool water to
run into the tank until it is cool enough to handle.
2. Unscrewprobe-rodassembly.Scale should flake off
easily. Build-up on tips should be scraped off to
removeanymineralresidue.
3. Remove the tank cover and wet vac minerals out of
tank(recommended).
4. To remove tank for cleaning, disconnect drain line
union, fill valve supply line, electrical connections to
drain, (disconnecting field wiring in conduit is NOT
recommended,) thermal trip, heaters, fill valve, and
probe. Disconnect steam hose from top of tank and
removemountingbracketfasteners.
5. Removeevaporatingchamberandclean.
6. Install the probe and probe plug assembly. Verify
thatgroundwireis connected.
7. Replace tank cover, making sure tank is sealed tight.
8. Reconnect drain line union, fill valve supply line,
electrical connections to drain, thermal trip, heaters,
fill valve, and probe. Connect steam hose to top of
tank.
9. Verify drain valve lever is in AUTO position.
10. The CRUV humidifier is again ready to humidify.
Off-SeasonShutdown
1. Switch off power.
2. Turn off water supply to make-up valve.
3. Drainevaporatingchamberandcleanifnecessary
(see steps 1 through 9 above).
4. Leavechamberdry,power OFFand watershut-off
valve closed until the next humidification season.
CRUV-DI Humidifier
ToService
1. Manuallyopendrainvalve.
2. Allow time for the evaporating chamber to cool. If the
tank is hot, cool it down by moving the valve lever
located on the back of the drain valve to the manual
open position – the fill valve will eventually open
allowing cool water to run through the tank until it is
coolenoughtohandle.
3. Shut off electrical power to unit.
4. Shut off water supply to make-up valve.
5. Makesureevaporatingchamberisdrained.
6. Unscrew four cover bolts and remove cover.
7. Checkoperation offloatvalveand low-water cut-out.
8. Inspectheating elements.
9. Inspect evaporating chamber and clean if necessary.
10. Inspect cover gasket, and replace if necessary.
11. Replacechambercover.
12. Verify drain valve is in the closed position.
13. Open water supply valve and turn on electric power.
14. CRUV-DI humidifier is again ready to humidify.
15. If necessary, remove tank as follows:
Remove flexible vapor hose from tank. Close drain
valve. Disconnect unit from drain and supply water
lines. DO NOT DISCONNECT ANY OF THE
ELECTRICALCONDUITS.
Off-SeasonShutdownProcedure
1. Switch off electrical power to unit.
2. Checkoverallappearance ofunit.
3. Shut off water supply to make-up valve.
4. Drainevaporatingchamberbymanuallyopening
drainvalve.*
5. Visually check electrical components of subpanel.
6. Leavechamber dry, power off, and water shut-off
valve closed until the next humidification season.
* With VAPOR-LOGIC3option, the evaporating chamber is automati-
cally drained after 72 hours without a call for humidity when the end-
of-season drain option is ordered.

10
CRUVTM TROUBLE-SHOOTING GUIDE (LW417 Electronic Water Level System Only)*
MODULE INDICATING
LIGHTS
PROBLEM FULL READY DRAIN POSSIBLE CAUSE RECOMMENDED ACTION
WATER
Humidifier will Off Off Off Control transformer Verify control voltage across secondary
not heat leads of transformer. Reset transformer
circuit breaker.
On On Off 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.
Faulty control board Verify control voltage between terminals.
Probe head deterioration** Replace probe head.
Humidifier will Off Off Off No water pressure at valve. Check water supply/shut off valves.
not fill Faulty water fill valve Verify action of fill water solenoid valve by
turning control module switch from standby
to normal op. Audible click should be
heard as solenoid operates.
Plugged strainer Check strainer.
Plugged valve Check valve.
Faulty control board Verify control voltage across input terminals
"B&W"
Humidifier does Off Off Off Lack of tank to probes Jumper wires violet, orange then brown to
not stop filling electrical continuity. Water ground. If water stops, verify tank ground;
conductivity 100 check water supply conductivity; then
microSiemens/cm (2 gr/gal) min. consult factory.
Fill valve is stuck open Check valve for foreign matter.
Drain Valve not closed Check for correct water flow through valve
Fill valve installed backward note arrow.
Off Off On Auto-drain mode 10 Minute must complete first.
Low output On On Off Electric drain valve not Correct cause of leakage or replace valve.
seating
On On Off Fill valve is stuck open Check valve for foreign matter.
Unit short cycles
On & Off On Off Probes may be incorrectly Confirm that unit is wired per diagram.
wired or need cleaning Clean probe rod tips with steel wool.
Reduced or no On On Off Heater malfunctioning Verify that proper voltage is being applied to
output even heaters. Check heater (amp draw and
though water compare to wiring diagram ratings).
is at the proper
level Malfunctioning control Heater contactor not functioning--replace.
system Service fuses blown. Auxiliary limit controls
not allowing system to operate (dust humidi-
stat, air flow proving switch, etc.). Reset,
replace or calibrate as required. Faulty or
inaccurate humidistat, replace or calibrate.
*For VAPOR-LOGIC3trouble-shooting, see the VAPOR-LOGIC3Operations and Maintenance Manual.
**Probe rod corrosion or probe head material aging may cause level control system failure. This generally does not occur in the first two years of operation.

11
CRUVTM-DI TROUBLE-SHOOTING GUIDE
PROBLEM POSSIBLE CAUSE RECOMMENDED ACTION
Humidifier will
not heat Control transformer Verify control voltage across secondary leads of transformer. Reset transformer circuit breaker.
Humidistat is not calling Set humidistat to call. Inspect for faulty humidistat.
Safety controls open Check safety control.(Air flow switch, high limit
humidistat, etc.)
Low water float switch Verify control voltage from float switch and transformer
secondary common.
Humidifier will
not fill No water pressure at valve Check manual water supply.Valve, minimum 25 psi water pressure.
Malfunctioning water float valve Check to make sure that valve float & stem moves
freely.
Plugged float valve Check float valve seat.
Water float valve
does not close Open drain valve Obstruction in drain valve will not allow complete closure, clean or replace valve.
Manual drain valve not closed Close drain valve.
Malfunctioning float valve Float ball has water leak. Float valve seat defective,
replace.
Water passing into overflow
stand pipe Readjust float valve rod, so water level reaches 1/4- 3/8" from overflow edge when water is at ambient or
cold state. Excessive water pressure, 80 psi maximum.
Float valve stuck Obstruction will not allow float valve to seat properly,
clean or replace with new seat.
Reduced or no
output even
though water is at
the proper level
Heater malfunctioning Verify that proper voltage is being applied to heaters.
Check heaters (amp draw and compare to wire
diagram ratings).
Malfunctioning control system Heater contactor not functioning, replace. Service
fuses blown. Auxiliary limit controls not allowing
system to operate (duct humidistat, air flow proving
switch, etc.).Reset, replace, or calibrate as required.
Faulty or inaccurate humidistat, replace or calibrate.
Time delay/interlock relays Relay delay on time is 10-15 seconds. Check relays.
Low water cut-off switch Check for proper operation.

12
CRUVTM TROUBLE-SHOOTING GUIDE (VAPOR-LOGIC®3only)
*Probe rod corrosion or probe head material aging may cause level control system failure. This generally does not occur in the first
two years of operation.
PROBLEM POSSIBLE CAUSE RECOMMENDED ACTION
Humidifier does not heat.
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 Check safety controls, air flow switch, and high limit humidistat.
Humidifier will not fill.
No water pressure at valve Check water supply/shut-off valves.
Faulty water fill valve Check for 24 volts at the fill valve.
Plugged strainer Check strainer.
Plugged valve Check valve.
Faulty control board Verify control voltage across the fill valve output.
Humidifier does not stop
filling.
Lack of tank to probe electrical
continuity. Water conductivity must
be 100 microSiemens/cm (2 gr/gal)
Add salt to the tank.If this solves the problem, consult factory for
further advice.
Fill valve stuck open Check valve for foreign matter.
Drain valve not closed
Fill valve installed backward Check for correct water flow through valvee by noting arrow.
Autodrain mode Humidifier may be in periodic drain and flush.Check controller
display.
Low output
Electric drain valve not seating Correct the cause of leakage or replace valve.
Fill valve stuck open Check valve for foreign matter.
Unit short-cycles.
Controller cycle rate set too low Review controller cycle set point.
Reduced or no output even
though water is at the
proper level
Heater malfunctioning Verify that proper voltage is being applied to heaters.Check heater
amp draw and compare to wiring diagram ratings.
Malfunctioning control system Replace heater contactor if not functioning. Verify auxiliary limit
controls (humidistat, air flow proving switch, etc.) and reset,
replace or calibrate as needed.

13
CRUVTM-DI TROUBLE-SHOOTING GUIDE (VAPOR-LOGIC®3only)
MELBORPESUACELBISSOPNOITCADEDNEMMOCER
.taehtonlliwreifidimuHremrofsnartlortnoC .rekaerbtiucricremrofsnartlortnocteseR
gnillactonsitatsidimuH .tatsidimuhytluafroftcepsnI.llacottatsidimuhteS
neposlortnocytefaS .cte,tatsidimuhtimilhgih,hctiwswolfria,slortnocytefaskcehC
ffotucretawwoL ,hctiwsdesolcrofstlov0erusaeM.33dna23draobtakcehC
.hctiwsnepo.C.Aroftlov5.2yletamixorppa
.lliftonlliwreifidimuHevlavtaerusserpretawoN .erusserpretawisp52muminim,evlaV.ylppusretawlaunamkcehC
hctiwstaolfgninoitcnuflaM .metsnoyleerfsevomtaolftahterusekamotkcehC
evlavllifdeggulP.telnievlavllifkcehC
potstonseodreifidimuH
.gnillif
evlavniardnepO ronaelC.erusolcetelpmocwollatonlliwevlavniardninoitcurtsbO
.evlavecalper
desolctonevlavniardlaunaM.evlavniardesolC
nepokcutsevlavlliF ,mataolfnekorb,taolfdeggol-retaw,rettamngierofrofevlavkcehC
.reppotsevlavnrowro
nevetuptuoonrodecudeR
reporpehttasiretawhguoht
.level
gninoitcnuflamretaeH retaehkcehC.sretaehotdeilppagniebsiegatlovreporptahtyfireV
.)sgnitarmargaidgniriwoterapmocdnawardpma(
metsyslortnocgninoitcnuflaM .nwolbsesufecivreS.ecalper,gninoitcnuftonrotcatnocretaeH tsud(etarepootmetsysgniwollatonslortnoctimilyrailixuA etarbilacroecalper,teseR).cte,hctiwsgnivorpwolfria,tatsidimuh .etarbilacroecalper,tatsidimuhetaruccaniroytluaF.deriuqersa

14
OM-779-5
* Specify humidifier model and serial numbers when ordering replacement parts.
Table 14-1: CRUVTM 2 through 16
REPLACEMENT PARTS
Item Description Qty Part No.
1 1/4-20 X 1" lg phillips head bolt 4 700300-013
2 thermo cut-out 1 409560-001
3 heater terminal cover 1 *
4 tank cover 1 *
5 heater element 1 409600 *
6 probe assy with conduit and fitting 1 406050-100
7 probe assy gasket 1 309750-003
8 probe assy, CRUV 2-4 1 406270
8 probe assy, CRUV 6-34 1 406275
9 3/4" electric valve 24v 1 505400-001
10 tank weldment 1 *
11 1/4" solenoid valve 24v w/flying leads 1 505084
12 3/4" ID hose 1 307020-002
13 3/4" hose clamp 4 700560-075
14 1/4-20 nut assy CRUV/CRUV-DI 2-4 4 700650
14 1/4-20 nut assy CRUV/CRUV-DI 6-34 2 700650
15 cover to tank gasket 1 *
16 #8 external tooth washer pltd 2 700200-003
17 #8-32 hex nut pltd 4 700200-002
18 #8-32 X1/2" phillips head screw 2 700170-007
19 1/4" lock washer 4 700351-025
20 nylon probe housing, CRUV 1 308500

15
REPLACEMENT PARTS
OM-779-6
* Specify humidifier model and serial numbers when ordering replacement parts.
Table 15-1: CRUVTM 21, 25, 30 and 34
Item Description Qty Part No.
1 1/4-20 X 1" lg phillips head bolt 4 700300-013
2 thermo cut-out 1 409560-001
3 heater terminal cover 1 *
4 tank cover 1 *
5 heater element, 2kW 120v * 409600 *
6 probe assy with conduit & fitting 1 406050-100
7 probe assy gasket 1 309750-003
8 probe assy, CRUV 6-34 1 406275
9 3/4" electric valve 24v 1 505400-001
10 tank weldment 1 *
11 1/4" solenoid valve 24 v w/flying leads 1 505084
12 3/4" ID hose 1 307020-002
13 3/4" hose clamp 4 700560-075
14 1/4-20 nut assy CRUV/CRUV-DI 6-34 2 700650
15 cover to tank gasket 1 *
16 #8 external tooth washer pltd 2 700200-003
17 #8-32 hex nut pltd 4 700200-002
18 #8-32 X 1/2" phillips head screw 2 700170-007
19 1/4" lock washer 4 700351-025
20 nylng probe housing, CRUV 1 308500

16
REPLACEMENT PARTS
OM-779-7
* Specify humidifier model and serial numbers when ordering replacement parts.
Table 16-1: CRUVTM-DI 2 through 16
metI noitpircseD ytQ .oNtraP
1tlobdaehspillihpgl"1X02-4/14310-003007
2tuo-tucomreht1100-065904
3revoclanimretretaeh1*
4yssataolf1013505
5rehsawkcol"4/14520-153007
6revocknat1*
7tnemeleretaeh**006904
8yssahctiwstaolf1
9teksagyssaeborp1400-057903
01tss303tpn81"4/1gnirlaes1563603
11yssaevlavllabtss"2/11300-000505
11 ton(yssaevlavniardnosaes-fo-dne
)nwohs
1300-680505
21tnemdlewknat1*
3161-4sledomllif140.,ecifiro1140-922061
41gnisuoheborpnolyn1005803
51esohDI"4/31200-020703
61pmalcesoh"4/34570-065007
714-2ID-VURC/VURCyssatun02-4/14056007
7161-6ID-VURC/VURCyssatun02-4/12056007
81teksagknatotrevoc1*
91dtlprehsawhtootlanretxe8#2300-002007
02dtlptunxeh23-8#6200-002007
12evlavllif,dlewepip1512061
22wercsdaehspillihp"2/1X23-8#2700-071007

17
REPLACEMENT PARTS
OM-779-8
* Specify humidifier model and serial numbers when ordering replacement parts.
Table 17-1: CRUVTM-DI 21, 25, 30 and 34
metI noitpircseD ytQ .oNtraP
1tlobdaehspillihpgl"1X02-4/14310-003007
2tuo-tucomreht1100-065904
3revoclanimretretaeh1*
4yssataolf1013505
5rehsawkcol"4/11520-153007
6revocknat1*
7tnemeleretaeh**006904
8yssahctiwstaolf1
9teksagyssaeborp1400-057903
01tss303tpn81"4/1gnirlaes1563603
11yssaevlavllabtss"2/11300-000505
11 ton(yssaevlavniardnosaes-fo-dne
)nwohs
1300-680505
21tnemdlewknat1*
3143-12sledomllif250.,ecifiro1250-922061
41gnisuoheborpnolyn1005803
51esohdi"4/31200-020703
61pmalcesoh"4/34570-065007
7143-6ID-VURC/VURCyssatun02-4/12056007
81teksagknatotrevoc1*
91dtlprehsawhtootlanretxe8#2300-002007
02dtlptunxeh23-8#6200-002007
12evlavllif,dlewepip1512061
22wercsdaehspillihp"2/1X23-8#2700-071007

18
REPLACEMENT PARTS
Item Description Qty Part No.
1 main board, VL3 1 408490-001
2 block, din rail stop 5 408252-006
3 terminal, ground 1 408252-010
4 terminal 2 408252-001
5 transformer, 120/280/240/480* 1 408965-001
5 transformer, 600v* 1 408986
6 SSR, 480 VAC 50 amp 1 pole 2 408677-002
7 contactor, 60 amp* 1 407001-021
7 contactor, 32 amp* 1 408991
83 pole 3Ø power block* 2 408300-002
8 2 pole 1Ø power block* 2 408300-001
9 fan, 24 volt 1 408677-001
Table 18-1: CRUVTM Control Cabinet with VAPOR-LOGIC®3
and SSR option
Table 18-2: CRUVTM Control Cabinet with VAPOR-LOGIC®3option
cruvpnlasm-1
OM-1017B
* Specify humidifier model and serial numbers when ordering.
* Specify humidifier model and serial numbers when ordering.
OM-1017C
metI noitpircseD ytQ .oNtraP
1"51X"31,lenapbus1300-027561
2gnol"4/1-2,liarNID22200-567761
3"2/1-4,liarNID15400-567761
4*A23,rotcartnoc1020-100704
4*A06,rotcartnoc1120-100704
5*V006,remrofsnart1689804
5*802/084/042/021,remrofsnart1100-569804
6*rewopØ3elop31200-003804
6*rewopØ1elop21100-003804
7potsliarNID,kcolb4600-252804
8lanimret2100-252804
9dnuorg,lanimret1010-252804
014-PCAG8-607-L,guldnuorg1810-052904
11Fepyt"4/1-1X23-6#,wercs2200-001007
21Fepytspillihp83.X23-8#,wercs8100-07107
31Fepytspillihp57.X23-6#,wercs6100-001007
41"8/3X8#latem,ffodnats6295904
51dtlp23-6#xehtun6300-001007
61draobrossecorporcim1100-094804
71htootlanretxe23-8#,rehsawrats1300-002007
81eriwreppoc,lebal1050508
91dnuorgenihcam,lebal1010008
02lobmysdnuorg,lebal1018608
12gnihtraeevitcetorp,lebal1028608

19
MAINTENANCE SERVICE RECORD
DATE INSPECTED PERSONNEL OBSERVATION ACTIONS PERFORMED

20
TWO-YEAR LIMITED WARRANTY
Form No. CRUV99-C-0902 Copyright © 2002 DRI-STEEM Humidifier Company, Inc.
Continuous product improvement is a policy of DRI-STEEM Humidifier Company;
therefore, product features and specifications are subject to change without notice.
DRI-STEEM,CRU,RAPID-SORBandVAPOR-LOGIC3areregisteredtrademarksoftheDRI-STEEMHumidifierCompany.
U.S.Headquarters:
14949Technology Drive •EdenPrairie,MN 55344
Phone:[phone]•[phone]•Fax:[phone]
E-Mail:[email protected]•Web: www.dristeem.com
EuropeOffice:
Bell Place, Bell Lane • Syresham, Brackley • NN13 5HP, U.K.
Phone: [phone] • Fax: [phone]
E-Mail: [email protected]
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.
If any DRI-STEEM product is found to be defective in material or workmanship during the applicable warranty
period, DRI-STEEM’s entire liability, and the purchaser’s sole and exclusive remedy, shall be the repair or
replacement of the defective product, or the refund of the purchase price, at DRI-STEEM’s election. DRI-
STEEM shall not be liable for any costs or expenses, whether direct or indirect, associated with the installa-
tion, removal or reinstallation of any defective product.
DRI-STEEM’s limited warranty shall not be effective or actionable unless there is compliance with all installa-
tion and operating instructions furnished by DRI-STEEM, or if the products have been modified or altered
without the written consent of DRI-STEEM, or if such products have been subject to accident, misuse,
mishandling,tampering,negligence or improper maintenance. Any warranty claim must be submittedto
DRI-STEEM in writing within the stated warranty period.
DRI-STEEM’s limited warranty is made in lieu of, and DRI-STEEM disclaims all other warranties, whether
express or implied, including but not limited to any IMPLIED WARRANTY OF MERCHANTABILITY, ANY
IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE, any implied warranty arising out of a
course of dealing or of performance, custom or usage of trade.
DRI-STEEMSHALL NOT, UNDER ANY CIRCUMSTANCES BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL,SPECIALORCONSEQUENTIALDAMAGES(INCLUDING,BUTNOTLIMITEDTO,LOSSOF
PROFITS, REVENUE OR BUSINESS) OR DAMAGE OR INJURY TO PERSONS OR PROPERTY IN ANY
WAY RELATED TO THE MANUFACTURE OR THE USE OF ITS PRODUCTS. The exclusion applies regard-
less of whether such damages are sought based on breach of warranty, breach of contract, negligence, strict
liability in tort, or any other legal theory, even if DRI-STEEM has notice of the possibility of such damages.
By purchasing DRI-STEEM’s products, the purchaser agrees to the terms and conditions of this limited
warranty.