Page 1
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
Page 2
TABLE OF CONTENTS
TO THE PURCHASER AND THE INSTALLER
Thank you for purchasing our CRU®V 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-STEEM Humidifier Company
CRUV Humidifier ......................................................................... 3
Installation .................................................................................. 4
Specifications, Capacities, and Dimensions ............................ 6
Start-up and Operation ............................................................... 8
Maintenance ................................................................................ 9
Trouble-Shooting Guide ............................................................. 10
Replacement Parts ...................................................................... 14
Maintenance Service Record ..................................................... 19
Two-Year Limited Warranty ........................................................ 20
2
Page 3
CRU®V HUMIDIFIER
Figure 3-1: The CRU®V Humidifier
(CRUV 6-25 shown, CRUV 2, 4, 30, and 34 not shown)
Probe
Steam outlet
Strainer
Fill
valve
Over
flow
Electric drain
Heater terminal cover
Cover
Cover
bolts
Heater
element
Tank
temperature
sensor
OM-770-1
Figure 3-2: The CRUV-DI Humidifier
(CRUV-DI 6-25 shown, CRUV-DI 2, 4, 30, and 34 not shown)
Float switch
Steam outlet
Water
supply
Over
flow
Heater terminal cover
Cover
Cover
bolts
CRUV Humidifier
This humidifier is designed to be used with either softened or unsoftened water (softened water will greatly
reduce humidifier maintenance and improve overall
system performance). The probe-type level control
system requires water conductivity of at least 100
micromhos/cm (2 grains/gal or 34.2 mg/1) to function, and
therefore, will not operate with demineralized water. For
humidification using demineralized water, see CRUV-DI
below.
CRUV-DI Humidifiers
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
deionized or RO demineralized water, there is no need to
clean the unit, although an annual inspection of the
evaporating chamber is recommended.
½" SST
ball valve
Heater
element
Tank temperature sensor
OM-770-2
3
Page 4
INSTALLATION
Locate the CRU®V humidifier near an electric power
source, water supply and a drain. Verify that sufficient
room is provided for a water seal in the drain piping. Refer
to Figure 4-3.
In an Air-Conditioning Unit
When installing a humidifier inside an air conditioning unit,
provide adequate support; allow easy access for removing
and servicing the evaporating chamber, and provide
adequate clearance to install the vapor hose and dispersion tube (see figure 4-1) and water seal. Refer to page 6
for mounting hole 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
(see figure 5-2).
Place the control cabinet or electrical sub-panel in a
grounded protective metal enclosure and mount in a dry
and accessible location.
Examples of Installation in an Air Stream
Figure 4-1: Installation in an Air-Conditioning Unit
If draining the evaporating chamber by gravity is not
possible, use a small condensate lift pump, rated to pump
212° F/100°C water.
Figure 4-2: Horizontal Dispersion Tube
Duct
Vapor Hose
OM-2006
Figure 4-3: Piping for the CRUV
Water seal must
not be above
bottom of frame
12" (305 mm)
Note: provide 1"
(25 mm) air gap to
eliminate back
siphonage
Floor drain
Sanitary
sewer
OM-2008
OM-2003-1
Horizontal mounting of dispersion tube in a duct, connected
via vapor hose to a wall-mounted CRU Series humidifier.
4
Page 5
INSTALLATION
Piping
Water make-up piping should be of corrosion-resistant,
code-approved material (copper, steel, or plastic). The
final connection size is ¼" NPT. In cases where water
hammer is possible, a shock arrestor should be
considered.
Drain piping should be of code approved material
(copper, steel, or plastic rated for 212°F/100°C minimum).
The ¾" O.D. copper sweat connection should not be
reduced in size. (See figure 4-3).
If there is no sewer available for drainage, the unit can
be piped for manual drainage. Consult factory for instructions.
Wiring
The CRU
®
V 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
provide electrical power to components from subpanel.
Wiring must meet all electrical codes, the current characteristics, and capacity requirements should be checked
against the nameplates. The electrical subpanel should be
mounted in a location convenient for service. Wiring must
be in accordance with all governing codes, and with the
humidifier wiring diagram.
The wiring diagram(s) are
shipped loose with the unit. The wiring between the control
cabinet and humidifier must be rated at 105°C, 600V.
Caution: Only qualified electrical personnel
should perform installation procedures.
Figure 5-2: Vertical Dispersion Tube
Duct
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.
Figure 5-3: RAPID-SORBTM Rapid Absorption Tube
Bank
Duct
Figure 5-1: Horizontal Dispersion Tube Lower Than
Humidifier
Duct
Tee
3"-5"
(127 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).
OM-774-1
OM-831-1
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.
TM
For complete information on calculating the number of
dispersion tubes required to satisfy steam absorption
distance requirements, consult your sales representative,
the DRI-STEEM factory, or use DRI-STEEM's DRI-CALC
Humidification Sizing and Selection Software.
5
®
Page 6
SPECIFICATIONS, CAPACITIES, AND DIMENSIONS
CRU®V Mechanical/Electrical Specifications
Top view
OM-2004
End Elevation
15.0
G 4.25
H
E
A
Side Elevation
(CRUV 25, 30, 34)
A
F
D
OM-759-1
0.250
Table 7-1: CRUV Dimensions (in inches)
ledoMABCDEFGH
4&2-ID-VURC/VURC
F
61&21-VURC/VURC
NOTE: Charts shown here can be used for CRUV-DI sizing.
.ni53.4105.5100.988.705.1144.1183.26.6
mm46349392200229219233.067.761
.ni53.4100.
01&8,6-ID-VURC/VURC
mm46360456352292492372.8212.632
.ni53.4100.6183.4186.0188.6157.4150.53.9
mm46360456317
.ni53.4100.6183.4152.2188.6152.6150.53.9
43&03,52,12-VURC/VURC
mm46360456311392431472.8212.632
6183.4188.888.6149.2150.53.9
292457372.8212.632
G
OM-2002
4.25
C
Table 7-2: CRUV Mechanical/Electrical Specifications and Capacities
CRUV-2
CRUV-DI-2
Outpu t/hour
(lbs /gal/kg )
Operating wt.
(lbs/kg)
Shipping wt.
(lbs/kg)*
Amps at:
120v/1ø
208v/1ø 9.6 19.2 28.8 38.5 - - - - - - - -
230v/1ø*** 8.0 16.0 24.0 31.9 39.9 - - - - - - -
240v/1ø 8.3 16.7 25.0 33.3 41.7 - - - - - - -
480v/1ø 4.2 8.3 12.5 16.7 20.8 25.0 29.2 33.3 43.8 - - -
600v/1ø 3.3 6.7 10.0 13.3 16.7 20.0 23.3 26.7 35.0 41.7 - -
208v/3ø - 16.7** 25.0** 33.3** 29.1** 33.3 38.9 44.4 - - - -
240v/3ø - 14.4** 21.7** 28.9** 25.3** 28.9 33.7 38.5 - - - -
400v/3ø - 8.7** 13.0** 17.3** 15.2** 17.3 20.2 23.1 30.3 36.1 43.3 -
480v/3ø - 7.2** 10.8** 14.4** 12.6** 14.4 16.8 19.2 25.3 30.1 36.1 40.9
600v/3ø - 5.8** 8.7** 11.5** 10.1** 11.5 13.5 15.4 2 0.2 24.1 28.9 32.7
kW 2 .0 4.0 6.0 8.0 10.0 12.0 14 16.0 21.0 25.0 30.0 34.0
6/.7/2.7 12/1.4/5.4 18/2.2/8.2 24/2.9/10.9 30/3.6/13.6 36/4.4/16.4 42/5/19.1 48/5.8/21.8 63/7.7/29.0 75/9.0/34.0 90/10.9/41.4 102/12.2/46.3
43/20 44/20 83/38 83/38 100/45 100/45 85/39 100/45 113/51 113/51 117/53 117/53
18/8 19/9 40/18 40/18 44/20 44/20 37/18 44/20 47/21 47/21 51/23 51/23
16.7 - - - - - - - - - - -
* 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%.
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-34
6
Page 7
START-UP AND OPERATION
Start-up and Checkout Procedures
After the system has been properly installed and connected 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
mounting hole locations.
Piping
Verify that all piping connections have been completed as
recommended and that water pressure is available. Refer
to page 5.
Electrical
Verify that all wiring connections have been made in
accordance with all governing codes and the enclosed
wiring diagram. Refer to page 5.
Caution: Only qualified personnel should
perform start-up procedure.
LW415 Electronic Water Level Control Module
When the power is activated, the solenoid-operated water
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
probe plug and cable from probe rod assembly (located
on the top of the tank), allowing the fill valve to reenergize 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
heating element.
Water Refill
During operation, when the water line drops below level B
the fill valve opens, and remains open until the water line
returns to level A (figure 8-1).
Heater Protection
Should the water line ever drop below level C, the heaters
are de-energized and remain OFF until the water line has
been restored to level C. This feature provides heater
protection in the event of a low-water condition.
Figure 8-1: Electronic
Probe Control for
Maintaining Proper
Water Level (CRUV®)
A
B
C
OM-211-2
A simple three-probe conductivity sensor cycles a
solenoid-operated water fill valve to maintain the proper
water levels.
The CRU
LW 415 Electronic Water Level Control Module or the
optional VAPOR-LOGIC
If your system is equipped with the VAPOR-LOGIC
system, see the
nance Manual
reading this manual beginning at the maintenance section
on page 9.
®
V humidifier is available with either the standard
®
microprocessor control system.
3
3
VAPOR-LOGIC3 Operations and Mainte-
for more information. Then continue
Drain/Flush Feature
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
water and minerals from the evaporating chamber.
2. When the height of the water drops to the “REFILL”
level, the fill valve opens.
3. The drain and fill valves remain open for ten more
minutes, flushing the chamber.
4. 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.
7
Page 8
START-UP AND OPERATION
Test Cycling the Drain/Flush System
The level control board contains four pairs of terminal
pins which are marked 20, 40, 80 and “T” (TEST). To
test:
1. Pull the pin block off the pair of pins in use, move it to
the “T” pair, and push it on.
2. Set the humidistat high enough so that unit will remain
“on call” for at least one hour.
3. After about 35 minutes of operation, activation will
take place, causing the drain valve to open. The
water level will then drop to level B (see figure 8-1 on
page 8) and cause the fill valve to open. Both valves
will remain open for about 10 minutes.
4. The drain valve will then close, and the water level
will rise to level A (see figure 8-1 on page 8), causing
the fill valve to close.
5. Once the test cycle is complete, move the pin block
back to the desired pair of pins. Failure to do so
will result in a drain/flush cycle every 35 minutes.
CRU®V Make-up Water Piping
If the water pressure is above 60 psi (414 kPa) and/or
water hammer would be objectionable, a pressurereducing 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: Minimum water supply 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.
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) Check heater draw by testing and recording voltage
and amperage in each phase. Readings should
match name plate readings; name plate is located on
the humidifier housing.
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
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. Light to moderately hard water (2 to 10 grains/gallon
or 34.2 to 171 mg/1 hardness)
• annual cleaning
2. High mineral content water (more than 10 grains/
gallon or 171 mg/1 hardness)
• cleaning frequency determined by use and water
quality
• periodic drain and flush cycles
3. DI/RO water (Model VMDI)
• no regular cleaning required (although regular
inspections are advised)
• 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. To dramatically reduce mineral accumulation inside
the evaporating chamber, softening of the makeup water
recommended. (Solids like silica are not removed in the
the softening process.)
Page 9
MAINTENANCE
CRU®V Humidifier
(Non-DI humidifiers with either the LW 415 or
VAPOR-LOGIC
Mineral Precipitate
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 (VAPOR-LOGIC
the bottom of the evaporating chamber.
Cleaning the Evaporating Chamber
The heating element itself is self-cleaning. The mineral
buildup on the element flakes off after reaching a thickness of about 1/16" (2 mm), and settles to the bottom of
the chamber.
Long heater element life can be expected when the
operation of the humidifier is observed for a few weeks
following initial start-up. By observing the mineral build-up
rate, the frequency of both drain/flush use and manual
cleaning can be determined and adjustments made.
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 burnout.
The CRUV humidifier is designed for convenient cleaning
and maintenance.
To Inspect and Service:
1. Drain evaporating chamber by manually opening
DRAIN valve. Do this by moving lever on valve to
MANUAL position and lock in place.
2. Unscrew probe-rod assembly. Scale should flacke off
easily. Build-up on tips should be scraped off to
remove any mineral residue.
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
remove mounting bracket fasteners.
5. Remove evaporating chamber and clean.
6. Install the probe and probe plug assembly. Verify
that ground wire is 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.
®
Control Systems)
3
®
3
option only) will settle to
9. Verify drain valve lever is in AUTO position.
10. The CRUV humidifier is again ready to humidify.
Off-Season Shutdown
1. Switch off power.
2. Turn off water supply to make-up valve.
3. Drain evaporating chamber and clean if necessary
(see steps 1 through 9 above).
4. Leave chamber dry, power OFF and water shut-off
valve closed until the next humidification season.
CRUV-DI Humidifier
To Service
1. Manually open drain valve.
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
cool enough to handle.
3. Shut off electrical power to unit.
4. Shut off water supply to make-up valve.
5. Make sure evaporating chamber is drained.
6. Unscrew four cover bolts and remove cover.
7. Check operation of float valve and low-water cut-out.
8. Inspect heating elements.
9. Inspect evaporating chamber and clean if necessary.
10. Inspect cover gasket, and replace if necessary.
11. Replace chamber cover.
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
ELECTRICAL CONDUITS.
Off-Season Shutdown Procedure
1. Switch off electrical power to unit.
2. Check overall appearance of unit.
3. Shut off water supply to make-up valve.
4. Drain evaporating chamber by manually opening
drain valve.*
5. Visually check electrical components of subpanel.
6. Leave chamber dry, power off, and water shut-off
valve closed until the next humidification season.
* With VAPOR-LOGIC3 option, the evaporating chamber is automatically drained after 72 hours without a call for humidity when the end-
of-season drain option is ordered.
9
Page 10
CRU®V TROUBLE-SHOOTING GUIDE (LW415 Electronic Water Level System Only)*
CONTROL PANEL
LIGHTS
PROBLEM FILL 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. T1 and T2
Off On Off Humidistat is not calling Set humidistat to call. Inspect for faulty
Safety controls open Check safety controls, air flow switch, high
Faulty control board Verify control voltage between terminals.
Probe head deterioration** Replace probe head.
Humidifier will On 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
Plugged strainer Check strainer.
Plugged valve Check valve.
Faulty control board Verify control voltage across terminals
Humidifier does On Off Off Lack of tank to probes Jumper wires brown to yellow. If water
not stop filling electrical continuity. Water stops, verify tank ground; check water
conductivity 100 supply conductivity; then consult factory.
micromhos/cm (2 gr/gal) min.
humidistat.
limit humidistat, etc.
turning control module switch from standby
to normal op. Audible click should be
heard as solenoid operates.
H & N.
On Off On Auto-drain mode 10 Minute must complete first.
Low output Off On Off Electric drain valve not Correct cause of leakage or replace valve.
Off On Off Fill valve is stuck open Check valve for foreign matter.
Unit short cycles
Reduced or no Off 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
*For VAPOR-LOGIC2 trouble-shooting, see the VAPOR-LOGIC2 Operations 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.
10
On & Off
On Off Probes may be incorrectly Confirm that unit is wired per diagram.
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.
seating
wired or need cleaning Clean probe rod tips with steel wool.
Malfunctioning control Heater contactor not functioning--replace.
system Service fuses blown. Auxiliary limit controls
not allowing system to operate (dust humidistat, air flow proving switch, etc.). Reset,
replace or calibrate as required. Faulty or
inaccurate humidistat, replace or calibrate.
Page 11
CRU®V-DI TROUBLE-SHOOTING GUIDE (LW415 Electronic Water Level System Only)*
PROBLEM
Humidifier will
not heat
Humidifier will
not fill
Water float
valve does not
close
READY
WATER
Off
Off
On
POSSIBLE CAUSE
Control transformer
Humidistat is not calling
Safety controls open
Low water float switch
No water pressure at valve
Malfunctioning water float
valve
Plugged float valve
Open drain valve
Manual drain valve not closed
RECOMMENDED ACTION
Verify control voltage across secondary leads of
transformer. Reset transformer circuit breaker.
Set humidistat to call. Inspect for faulty humidistat.
Check safety control. (Air flow switch, high limit
humidistat, etc.)
Verify control voltage from float switch and transformer
secondary common.
Check manual water supply. Valve, minimum 30 psi
water pressure.
Check to make sure that valve float & stem moves freely.
Check float valve seat.
Obstruction in drain valve will not allow complete
closure, clean or replace valve.
Close drain valve.
Malfunctioning float valve
Water passing into overflow
stand pipe
Float valve stuck
Reduced or no
output even
though water is
at the proper
level
*For VAPOR-LOGIC2 trouble-shooting, see the VAPOR-LOGIC2 Operations and Maintenance Manual.
On
Heater malfunctioning
Malfunctioning control system
Time delay/interlock relays
Low water cut-off switch
Float ball has water leak. Float valve seat defective,
replace.
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, 100 psi maximum.
Obstruction will not allow float valve to seat properly,
clean or replace with new seat.
Verify that proper voltage is being applied to heaters.
Check heaters (amp draw and compare to wire diagram
ratings).
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.
On delay relay delay time is 10-15 seconds. Check
relays.
Check for proper operation.
11
Page 12
CRU®V TROUBLE-SHOOTING GUIDE (VAPOR-LOGIC
®
only)
3
PROBLEM POSSIBLE CAUSE RECOMMENDED ACTION
Humidifier does not heat. Incorrect or non-existent supply
voltage to unit
Incorrect or non-existent control
voltage
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.
Check main line safety switch .
Check main line fuses.
Check for proper supply voltage.
Reset control transformer circu it breaker.
Check for 24 VAC control circuit voltage at T-1 and T-2 on the
control board.
Humidifier does not stop
filling.
Low output Electric drain valve not seating Correct cause of leakage or replace valve.
Unit short cycles Controller cycle rate set to low Review controller cycle set point.
Reduced or no output even
though water is at the proper
level.
*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.
Lack of tank to probes’ electrical
continuity; water conducti vity 100
micromhos/cm (2 gr/gal) or 34.2
mg/1 min.
Fill valve stuck open Check valve for foreign matter.
Drain valve not closed
Fill valve installed backward
Auto-drain mode Humidifier may be in periodic drain and flush. Check controller
Fill valve stuck open Check valve for foreign matter.
Heater malfunctioning Verify that proper voltage is being applied to heaters. Check heater
Malfunctioning control system Heater contactor not functioning, replace. Service fuses blown.
Add salt to the tank. If this solves the problem, con sul t factory for
further advice.
Check for correct water flow, through valve, note arrow.
display.
amp draw and compare to wiring diagram ratings.
Auxiliary limit controls not allowing system to operate (dust
humidistat, air flow proving sw itch, etc.) Reset, replace or calibrate
as required. Faulty or inaccurate humidistat, replace or calibrate.
12
Page 13
CRU®V-DI TROUBLE-SHOOTING GUIDE (VAPOR-LOGIC
MELBORPESUACELBISSOPNOITCADEDNEMMOCER
.taehtonlliwreifidimuHremrofsnartlortnoC .rekaerbtiucricremrofsnartlortnocteseR
®
only)
3
gnillactonsitatsidimuH .t
neposlortnocytefaS .cte,tatsidimuhtimilhgih,hctiwswolfria
ffotucretawwoL ,hctiwsdesolcrofstlov0erusaeM.33dna23draobtakcehC
.lliftonlliwreifidimuHevlavtaerusserpretawoN .erusserpretawisp52muminim,evlaV.ylppu
hctiwstaolfgninoitcnuflaM .metsnoyleerfsevomtaolftahterusekamotkcehC
evlavllifdeggulP.t
potstonseodreifidimuH
.gnillif
evlavniardnepO ronaelC.erusolcetelpmocwollatonlliwevlav
desolctonevlavniardlaunaM.evlavniardesolC
nepokcutsevlavlliF ,mataolfneko
,slortnocytefaskcehC
tlov5.2yletamixorppa
sretawlaunamkcehC
elnievlavllifkcehC
niardninoitcurtsbO
.evlavecalper
.reppotsevlavnrowro
atsidimuhytluafroftcepsnI.llacottatsidimuhteS
.hctiwsnepo.C.Arof
rb,taolfdeggol-retaw,rettamngierofrofevlavkcehC
nevetuptuoonrodecudeR
etawhguoht
.level
reporpehttasir
gninoitcnuflamretaeH retaehkcehC.sretaehotdeilppagniebsiegatlovreporptahtyfireV
metsyslortnocgninoitcnuflaM .nwolbsesufecivreS.ecalper,gninoitcnuft
armargaidgniriwoterapmocdnawardpma(
.)sgnit
onrotcatnocretaeH
tsud(etarepootmetsysgniwollatonslortnoctimilyrailixuA
ctiwsgnivorpwolfria,tatsidimuh
etarbilacroecalper,teseR).cte,h
.etarbilacroecalper,tatsidimuhetaruccaniroytluaF.deriuqersa
13
Page 14
REPLACEMENT PARTS
Table 14-1: CRU®V 2 through 16
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" s olenoid 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
* Specify humidifier model and serial numbers when ordering replacement parts.
OM-779-5
14
Page 15
REPLACEMENT PARTS
Table 15-1: CRU®V 21, 25, 30 and 34
Item Description Qty Part No.
1 1/4-20 X 1" lg phillips head bol t 4 700300-013
2 th ermo cut-out 1 409560-001
3 heater terminal cover 1 *
4 tank cover 1 *
5 hea ter element, 2kW 120v * 409600 *
6 probe assy w ith conduit & fitting 1 4 06050-100
7 probe assy gasket 1 309750-003
8 probe assy, CRUV 6-34 1 406275
9 3/4" el ectric 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 30702 0-002
13 3/4" hose clamp 4 700560-075
14 1/4-20 nut assy CRUV/CRUV-DI 6-34 2 7006 50
15 cover to tank gasket 1 *
16 #8 external tooth washer pltd 2 70020 0-003
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 7003 51-025
20 nyln g probe housing, CRUV 1 3 08500
OM-779-6
* Specify humidifier model and serial numbers when ordering replacement parts.
15
Page 16
REPLACEMENT PARTS
Table 16-1: CRU®V-DI 2 through 16
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 hea ter terminal cover 1 *
4 float assy 1 505310
5 1/4" lock washer 4 700351-025
6 tank co ver 1 *
7 heater element, 2kW 120v * 40 9600 *
8 float switch assy 1
9 probe assy gasket 1 30975 0-004
10 seal ring 1/4" 18 npt 303 sst 1 30636 5
11 1/2" sst ball valve assy 1 505000 -003
11
12 tank weldment 1 *
13 orifice, .041 fill models 4-16 1 160229-041
14 nylon probe housing 1 308500
15 3/4" ID hose 1 307020-002
16 3/4" hose clamp 4 700560-075
17 1/4-20 nut assy CRUV/CRUV-DI 2-4 2 700650
18 cover to tank gasket 1 *
19 #8 external tooth washer pltd 2 700200-003
20 #8-32 hex nut pltd 6 700200-002
21 pipe weld, fill valve 1 160215
22 #8-32 X 1/2" phillips head screw 2 700170-007
end-of-season drain valve assy (not
shown)
1 505086-003
16
* Specify humidifier model and serial numbers when ordering replacement parts.
OM-779-7
Page 17
REPLACEMENT PARTS
Table 17-1: CRU®V-DI 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 4095 60-001
3 heate r termi nal cover 1 *
4 float assy 1 505310
5 1/4" lock washer 1 700351-025
6 tank cover 1 *
7 heater eleme nt, 2kW 120v * 40 9600 *
8 float switch assy 1
9 probe assy gasket 1 309750-004
10 seal ring 1/4" 18 npt 303 sst 1 306365
11 1/2" sst ball valve assy 1 505000-003
11
12 tank weldment 1 *
13 orifice, .052 fill models 21-34 1 160229-052
14 nylon probe housing 1 308500
15 3/4" id hose 1 307020-002
16 3/4" hose clamp 4 700560-075
17 1/4-20 nut assy CRUV/CRUV-DI 6-34 2 700650
18 cover to tank gasket 1 *
19 #8 external tooth washer pltd 2 700200-003
20 #8-32 hex nut pltd 6 700200-002
21 pipe weld, fill valve 1 160215
22 #8-32 X 1/2" phillips head screw 2 700170-007
end-of-season drain valve assy (not
shown)
1 505086-003
* Specify humidifier model and serial numbers when ordering replacement parts.
OM-779-8
17
Page 18
REPLACEMENT PARTS
Table 18-1: CRU®V Control Cabinet with VAPOR-LOGIC
and SSR option
Item Description Qty Pa rt 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 pol e 2 408677-002
7 contactor, 60 amp* 1 407001-021
7 contactor, 32 amp* 1 408991
8 3 pol e 3Ø power block* 2 408300-002
8 2 pol e 1Ø power block* 2 408300-001
9 fan, 24 volt 1 408677-001
* Specify humidifier model and serial numbers when ordering.
Table 18-2: CRU
Item Description Qty Part No.
1 su bpanel, 13" X 15" 1 165720-003
2 DIN rail, 2-1/4" lon g 2 167765-0022
3 DIN rail, 4-1/2" 1 167765-0045
4 contactor, 32A* 1 407001-020
4 contactor, 60A* 1 407001-021
5 transformer, 600 V* 1 408986
5 transformer, 120 /240/480/208* 1 408965-001
6 3 pol e 3Ø power* 1 408300-002
6 2 pol e 1Ø power* 1 408300-001
7 block, DIN rail stop 4 408252-006
8 terminal 2 408252-001
9 terminal, ground 1 4 08252-010
10 ground l ug, L-70 6-8 GA CP-4 1 409250-018
11 screw, #6-32 X 1-1/4" type F 2 70010 0-002
12 screw, #8-32 X .38 phi llips type F 8 7017 0-001
13 screw, #6-32 X .75 phill ips type F 6 700100-001
14 standoff, metal #8 X 3/8" 6 409592
15 nut, hex #6-32 pl td 6 700100-003
16 microprocessor bo ard 1 408490-001
17 star washer, #8-32 external tooth 1 70020 0-003
18 labe l, copper wire 1 805050
19 labe l, machine ground 1 800010
20 l abel, ground symbol 1 8 06810
21 label, protective e arthing 1 806820
®
V Control Cabinet with VAPOR-LOGIC
®
3
®
option
3
OM-1017C
cruvpnlasm-1
* Specify humidifier model and serial numbers when ordering.
18
OM-1017B
Page 19
MAINTENANCE SERVICE RECORD
DATE INSPECTED PERSONNEL OBS ERVATION ACTIONS PERFORMED
19
Page 20
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.
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. DRISTEEM shall not be liable for any costs or expenses, whether direct or indirect, associated with the installation, removal or reinstallation of any defective product.
DRI-STEEM’s limited warranty shall not be effective or actionable unless there is compliance with all installation 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 submitted to
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-STEEM SHALL NOT, UNDER ANY CIRCUMSTANCES BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, LOSS OF
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 regardless 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.
14949 Technology Drive, Eden Prairie, MN 55344
PH: 1-800-328-4447 • In MN: (612) 949-2415
Fax: (612) 949-2933 • E-Mail: sales@dristeem.com
Form No. CRUV99OM-1099 Copyright © 1999 DRI-STEEM Humidifier Company, Inc. Printed in the U.S.A.
20
Printed on recycled paper with
Printed on recycled paper with agribased inks
agri-based inks. Minimum 10%
Post-consumer Waste.
s
o
,
y
n
r
b
o
e
c
a
n
%
a
0
n
0
1
:
s
k
n
i
d
e
s
a
b
i
r
g
A
d
v
e
g
e
t
a
b
l
e
o
il
s
.
Loading...