Discontinued Series SGH Maintenance and Troubleshooting Guide sl-14060_R08

Discontinued Series SGH Maintenance and Troubleshooting Guide sl-14060_R08
SGH Steam
Generating Humidifiers
Maintenance and
Troubleshooting Guide
IMPORTANT: Read and save this guide for future
reference. This guide to be left with equipment owner.
SL-14060
Form # 99-427 Rev. 1 / 150-1636 Rev. A
Table Of Contents
MAINTENANCE
1
WHEN TO REPLACE THE STEAM CYLINDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
HOW TO REMOVE THE STEAM CYLIN DER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
MAN DA TORY CLEANING OF THE DRAIN VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
HOW TO IN STALL THE RE PLACE MENT CYL IN DER . . . . . . . . . . . . . . . . . . . . . . . . . . 2
EX TENDED SHUT DOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
BUILT ON AND REMOTE MOUNTED BLOWER PACKS
TROUBLESHOOTING
. . . . . . . . . . . . . . . . . . . . . . . . 3
3
PREREQUISITES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
BLOWER PACK OP ER A TION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
USING THE WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
PROCEDURES AND TERMS USED IN DIAGNOSING . . . . . . . . . . . . . . . . . . . . . . . . . . 4
PRIN CI PLE OF OP ER A TION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
FILL RATE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
DRAIN TIME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
RATED AMPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SHORT CY CLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
FOAMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
BACKPRESSURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
MONITORED LEG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
RESET UNIT (HUMIDIFIERS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
DIAGNOSTIC PRO CE DURES - TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . 6
WIRING DIAGRAM
7
available at end-of-cylinder-life, the required steam
output rate can no longer be maintained.
MAINTENANCE
WARNING! The plumbing and electrical
compartments contain high voltage components and
wiring. The access door(s) is equipped with a lock.
Access should be limited to authorized personnel only.
5. At this stage, the yellow lamp flashes (4 times in
sequence) and the green lamp is off, telling the
user that the cylinder has reached the end of its
life and will need to be replaced. The SGH will
not operate at end of cylinder life fault.
WHEN TO REPLACE THE STEAM
CYLINDER
HOW TO REMOVE THE STEAM CYLINDER
1. (It is advisable to keep a spare cylinder in stock
throughout the humidification season.) When
ordering a replacement steam cylinder, always
quote the three or five digit model number on the
label applied to the cylinder or quote the unit’s
serial number, model and voltage located on the
spec label (nameplate).
The steam cylinder is disposable and must be
replaced at end of cylinder life. Cylinder life is
dependent on water supply conditions and humidifier
usage. Failure to replace the cylinder at the end of
cylinder life may result in unit damage. Liebert is not
responsible for any damages resulting from, or
attributable to, the failure to replace a used cylinder
(see Manufacturer’s Warranty). There are many
indications, each of which signifies the end of cylinder
life.
1.
2. Turn off water supply to unit.
3. Open plumbing door.
4. The used cylinder must be drained completely
before removal. If the water has just been boiling,
allow it to cool before draining. Push the
ON/OFF/DRAIN switch to the MANUAL DRAIN
position. Leave it in this position just long enough
to drain the cylinder (usually less than 10
minutes).
After a period of operation (not on initial start-up),
the water level will approach the top of the
cylinder. (Life varies from 500 to 2000 operating
hours, as illustrated in Figure #1.)
Figure #1
Water Conditions vs. Cylinder Life
5. When completely drained, push the main
ON/OFF/DRAIN switch back to the OFF position.
Capacity Adjustment Setting
100%
50%
25%
30
500
6. Once drained, open the main electrical disconnect.
The electrical disconnect is to remain open during
the entire cylinder change operation.
400
20
7. Cylinder plugs are attached to the primary voltage
cylinder wires. (The plugs remain attached to the
wires unless they have to be replaced due to
damage.) The plugs are press-fitted over the
electrode pins protruding from the top of the
cylinder. Remove cylinder plugs from cylinder by
pulling vertically.
200
10
100
5
500
1000
2000
4000
Cylinder Life Expectancy
(average operating hours)
8000
2.
Each SGH humidifier has a yellow status lamp, a
green status lamp, and a relay for remote
indication. Double units (models SGH 200) have
two of each.
3.
When the yellow status lamp is on, the water
level is detected as being at the top of the cylinder.
This is normal on start-up, but as the contained
water concentrates, the water will stabilize at a
lower water level and the yellow lamp will be off.
4.
When the cylinder is fully used, the water level will
have returned to the top of the cylinder. Since
there is no longer any clean electrode surface
8. Using slot screwdriver, loosen the steam hose
clamp(s) and pull steam hose off the cylinder
vertically.
9. Using a small slotted screwdriver, depress tab on
the re-usable tie wrap, if present, around the
middle of the cylinder. This will allow you to
remove the tie wrap so you can re-use it later on.
10. Cylinder is now ready to be lifted out of the unit.
CAUTION: Cylinder and any undrained water
might still be HOT.
-1-
MANDATORY CLEANING OF THE DRAIN
VALVE
12. Push the two slip-on terminals back onto the two
tabs on the coil. The terminals, although not
identical, are reversible.
Always clean the drain valve before installing a
new cylinder since the valve port may be as dirty as
the used cylinder.
HOW TO INSTALL THE REPLACEMENT
CYLINDER
Note: Liebert does not recommend the use of any
acid solutions to clean the used cylinder. Always
replace a used cylinder.
1. Remove used cylinder as previously described.
2. Remove two screws securing drain valve body to
drain pan. Disconnect the two slip-on terminals
from the two tabs on the (24VAC) drain valve coil.
1. Reverse procedure in the section “How to remove
steam cylinder” to install new cylinder. With the
exception that the main disconnect is to be left
open until cylinder is completely installed and
reconnected.
3. Remove hose clip and hose connection from drain
valve body.
4. Drain valve assembly is now free to be taken to a
sink for disassembly and cleaning.
2. Ensure that cylinder is secured properly by the
re-usable tie wrap and mounting brackets within
the unit. (Verify that it is the right cylinder type).
5. Remove snap-fit red cap from coil assembly and
slide coil off the actuator.
3. The cylinder plug wires are color-coded in
accordance with colored dots beside the electrode
pins on top of the cylinder.
6. Loosen actuator with wrench and unscrew from
plastic valve body.
4. This color-coding must be adhered to when
replacing cylinder plugs on pins.
7. Clean the exposed core and spring and plastic
drain valve port.
5. With cylinders having six primary voltage cylinder
plugs, it should be noted that there are two of each
color.
8. Important: Tapered end of spring must be
installed toward the solenoid. Reassemble,
tighten actuator 1/4-turn past hand-tight. See
Figure #4.
6. Care must be taken so that cylinder leads of the
same color are always directly opposite each other
as indicated by the dot formation on the top of the
cylinder.
Figure #4
Reassembly of the Drain Valve and Fill Valve
7. The crimped on blue plug on all units is for the
sensor electrode which always goes on the single
pin surrounded by a plastic shoulder.
Actuator
Male Slip-on
Connection Tabs
Plunger
Spring
8. Ensure that cylinder plugs fit snugly on the pins.
Sleeve
9. If cylinder plugs become loose, it is best to obtain
a new replacement plug. Consult factory.
Holding Coil
EXTENDED SHUTDOWN
Before disconnecting power to the humidifier for a
period of extended shutdown, ALWAYS DRAIN the
cylinder first. Otherwise, the electrodes are subject to
harmful corrosion which drastically shortens cylinder
life. Do NOT leave the switch in the DRAIN position
indefinitely as the drain coil could burn out. Leave the
switch in the OFF position and “open” the main
external fused disconnect to stop power to the
humidifier. Close the shut off valve in the water supply
line feeding the humidifier. Lock the cabinet door(s) to
prevent unauthorized tampering. All doors are factory
supplied with keyed locks. DO NOT LEAVE KEY IN
9. Clean out the end of the hose, then reconnect it to
the drain valve body with the clamp.
10. Fit mounting screws through drain valve body, one
for the green ground wire.
11. WARNING: To prevent the possibility of electrical
shock the green ground wire must be reinstalled
before power is restored.
-2 -
Figure #3
Cylinder Plug Installation
TROUBLESHOOTING
PLEASE READ THIS SECTION BEFORE
REFERENCING SPECIFIC DIAGNOSTIC
MESSAGES.
Cylinder Plug Installation Instruction
For Part # 135-4012 (R, Y, or B)
0.50"
10 GA Wire
Cylinder Plug
1. Ensure the installation detail conforms with the
recommendations contained in the Installation
Manual.
2. Understanding the Principle of Operation is an
asset when troubleshooting. This information is
readily available from your local representative.
Hex (Allen)
5/64" (2 mm)
3. When contacting your local representative or
Liebert, for troubleshooting assistance, please
ensure the serial number has been obtained for
reference purposes.
Figure #4
Where To Oil
4. Whenever the troubleshooting steps indicate a
problem with the main PCB, first check all
connections at the main PCB before ordering
replacements.
Oil Here
PREREQUISITES
- on/off/drain switch must be switched on
- control circuit 8-10 must be made
LOCK. ACCESS SHOULD BE LIMITED TO
AUTHORIZED PERSONNEL ONLY.
- modulation humidistat, if present, must be calling
As long as the SGH is powered, it will
automatically drain the cylinder when there has not
been a call for humidity for a 72 hour period of time.
The cylinder will remain empty until there is a call for
humidity at which time the fill valve will open and refill
the cylinder. The unit will go through its normal
stabilization process for optimum operation.
- door interlock switch must be made (in ter lock switch
can be pulled out to op er ate unit)
- control circuit 82-83 and 84-85 must be made
NOTE: Most water does not contain enough
conductivity for full boil on initial start-up. Units will
need to concentrate the water over a time period
(hours to days). During this process both lights are on.
(Also see Troubleshooting Guide).
This feature will reduce the possibility of corrosion
of the electrodes and the possible accumulation of
algae and bacteria growing in the cylinder.
The SGH has built in diagnostic capabilities and
will shutdown for the following reasons:
- Excess cur rent
BUILT ON AND REMOTE MOUNTED
BLOWER PACKS
- Max fill time
- Change cyl in der/end of life
FAN MOTOR OILING: The blower pack fan motor
requires occasional oiling of motor bearings. To do
this, open up the blower pack top and oil the motor
with ten drops of SAE-20 grade motor oil. Refer to
Figure #4 for oiling slots. It is important to oil the fan
motor every four months to preserve long life and to
maintain the fan’s warranty. It is not necessary to
disassemble the fan/motor assembly. The exploded
view is for visual purposes only. See Figure #4.
See Figure #5 on page 4 for system messages
and responses of the unit.
-3-
Figure #5
Sys tem Mes sages and Re sponses
SGH
SYSTEM FAULTS*
UNIT
OPERATION
STATUS
UNIT STATUS LAMPS
RE MOTE IN DI CA TION
(24 VAC TO:)
YELLOW
GREEN
61-20
Ex cess Cur rent
OFF
Flashing
(1 time in sequence)
OFF
ON
Max. Filling Time
OFF
Flashing
(2 times in sequence)
OFF
ON
Cylinder Spent
OFF
Flashing
OFF
ON
ON
OFF
(4 times in sequence)
Maximum level
ON
ON
BLOWER PACK OPERATION
The following is a detailed explanation of how the
SGH humidifier (with and without options) operates.
Direct reference is made to the wiring diagram.
Reviewing the proper function in detail will make it
easier to troubleshoot if something goes wrong.
An optional blower pack, if present, gets its
primary voltage from inside the humidifier. This way,
only one external power source has to be connected to
the equipment.
Blower packs are equipped with a control
thermostat mounted on the steam distributor. When
the humidifier generates steam the thermostat is
heated, the contact is closed, and the fan is started.
When steam is no longer being generated, the fan cuts
out with a delay.
The wiring diagram details a 24 Vac control circuit
and a primary voltage circuit.
The contactor receives its “hot leg” from Relay #1
(RL1) on the control board. The fill receives its “hot
leg” from terminal P4/2. The drain receives its “hot
leg” from terminal P4/3.
If blower packs get overheated (malfunction of the
air circulation), the manual reset safety thermostat
interrupts the steam generation. To reset, switch off
the humidifier and wait until the steam distributor cools
down. Wait until the fan stops before throwing the
disconnect switch. Failure to do so will trip the safety
thermostat interrupts. Then remove left-hand side
intake air filter and, using a screwdriver, press the
reset button (marked with a red dot) inside the blower
packs.
PROCEDURES AND TERMS USED IN
DIAGNOSING
PRINCIPLE OF OPERATION
The conductivity of the water within the cylinder
must be controlled in order for the humidifier to
function properly. The fill and drain rates must be
maintained. Filling too quickly can cause over-amping
and automatic shutdown or blown fuses. Filling too
slowly can cause insufficient steam output and
foaming. Water supply pressure should be between
30 and 150 psig. Draining too slowly can cause
over-concentration and malfunction due to foaming.
These are just some examples of what can go wrong if
the fill and drain rates are not maintained.
All units are equipped with speed select switch.
The switch is located on the right-hand side of the
blower, inside the blower pack. To access the switch
remove the right-hand side intake air filter. For blower
packs working with humidifier outputs of 50lbs/hr or
higher use the high speed setting.
USING THE WIRING DIAGRAM
FILL RATE
Fixed to the inside of each unit’s door is a wiring
diagram showing all of the internal (and most of the
external) wiring details. Additional external wiring
details can also be found with any electrical
accessories purchased from Liebert.
Fill rates of suspect units should be checked. Fill
rates should measure nominally at 1" to 1-1/2" of
vertical rise in water level in the cylinder in one minute.
A clogged fill valve will cause lower fill rate. The fill
valve strainer is removable and can be cleaned.
-4 -
DIAGNOSTIC PROCEDURES - TROUBLESHOOTING
The SGH controller provides a number of messages to simplify troubleshooting procedures. The follow ing
table presents fault messages displayed by the controller, their meaning and possible corrective actions. Refer to the
preceding section for detailed information about terms used in the table.
Unit Status Lamp
Yellow
Green
1 flash in
sequence
Off
2 flashes in Off
sequence
Symptom
Possible Cause
Corrective Ac tion
Excess Cur rent.
Cur rent drawn on mon i tored
pri mary lead to cyl in der has
reached or ex ceeded 130%
of its rated amps. The unit
will have tried to self-correct
prior to sys tem shut down by
draining wa ter from the cyl inder and de-energising the
contactor mo men tarily while it
drains. This self cor rec tive action oc curs be tween 115%
and 130% of it’s rated amps.
When con trol ler de tects excess cur rent it also drains water from cyl in der.
1. Cyl in der wa ter is
over-concentrated (too conduc tive) due to re stricted
drain, short-cycling by controls, sup ply wa ter not
within ac cept able lim its (too
con duc tive), im proper fill
rate, in cor rect cyl in der being used.
1. Turn unit back on and check the fill rate
(1 - 1-1/2 inches per minute)
Max i mum fill ing time.
Neither Maximal Level (full
cyl in der) is de tected, nor is
there enough cur rent drawn
to meet ca pac ity de mand
within a pre-programmed inter val.(30 min utes)
1. Steam line re stric tion
causing back pressure
1. Check for wa ter leak ing from drain. If
pres ent, cor rect the drain valve de fi ciency
(check for de bris hold ing drain coil plunges
open)
2. Manually drain cyl in der while check ing
drain rates (See Figure #6). If too slow
cor rect cause.
3. Once RH% set point is at tained, mon itor cy cle time and check for wa ter flow
2. Wa ter level too high due pres ence in over flow hose (symp tom of
backpressure).
to leak ing fill valve, ex cess
con den sate re turn from
steam line.
2. Im proper fill rate
3. Leaking drain valve
2. Check steam line to the steam dis trib utor (duct or blower pack) , for re stric tions
that could cause high back pres sure.
3. Check wa ter level in cyl in der.
4. Full cyl in der not
detected.
- If full: Re set unit and en sure there is a
de mand for steam (the green LED on unit
door will stay il lu mi nated). Max i mal Level
should be in di cated with both the green
and yel low lights on the unit door il lu minated. If Maximal Level is not in di cated, a
prob lem ex ists with the high wa ter sen sor
cir cuitry since the unit does not sense the
wa ter level.
- If not Full: Drain cylinder, re set unit and
check the fill rate (1”-1 ½” per min ute). If fill
rate is cor rect, back pres sure is the likely
cause and should be rechecked.
4 flashes in Off
sequence
Cyl in der spent.
Wa ter level stays high, cycling on and off Max i mal
Level (full cyl in der), with out
an in crease in out put/amp
draw or reach ing de mand for
an ex tended pe riod of time.
1 .Normal on start-up with Re place the cyl in der im me di ately or if the
a new cyl in der or a cyl in der cyl in der has been re placed re cently, check
that has been completely
for foaming.
drained be cause of an exten sive off pe riod. This
can last sev eral hours un til
the wa ter in the cyl in der has
con cen trated. Or the electrodes can no lon ger provide rated ca pac ity (or
ad justed ca pac ity). Wa ter
level au to mat i cally rises to
seek out fresh elec trode
sur face to meet the demand.
-6-
DRAIN TIME
FOAMING
Manual drain time of a half full cylinder depends
on cylinder size (see Figure #6).
A phenomenon which can occur in water when
impurities, already in the water, reach an excess
concentration as result of boiling away pure water and
the continued boiling action agitating the contained
water. The humidifier electronics are designed to
prevent this occurrence although in extreme cases
water will foam with little concentration, making it
necessary to have the drain time of the water,
contained in the cylinder, increased. Foaming is
normally caused by short cycling, a restricted drain, or
back pressure. The foam, generated in these
instances, is conductive and may lead to a false full
cylinder indication if the level of the foam approaches
the top of the cylinder.
If time measurements are longer, repeat with the
external drain disconnected (and draining into a pail)
to verify that the external drain is impeding flow. If it
still does not drain, check for a clogged strainer or
drain valve.
A clogged strainer or drain valve will cause
shortened cylinder life. Determine what caused the
strainer or drain valve to clog in the first place.
Do not assume that if a strainer and/or drain valve
is clogged that it is to blame. If the external drain has
been impeding flow then waste accumulates resulting
in a clogged strainer or clogged drain.
BACKPRESSURE
Restriction of steam flow caused by improperly
sloped steam lines, elbows changing the direction of
the steam flow from horizontal to vertical without a
condensate drain leg, and any plumbing detail allowing
the accumulation of condensate, undersized steam
line, improper steam distributor, downward air flow
onto the distributor creating excess static pressure at
the steam outlets or high static pressure ducts (not
probable). To overcome excess static pressure in the
duct, a fill cup extension kit should be used. In
downflow applications, a downflow distributor should
be used but in some cases the fill cup extension will
also be required.
Clean the drain valve and install a fresh cylinder.
Then measure the manual drain time with and without
the external drain connected. Is the external drain
impeding flow? Liebert recommends an open external
drain line.
Figure #6
Manual Drain Times
CYL. SIZE PROPER TIME (sec) TO DRAIN MANUALLY
FROM SEAM TO EMPTY
(SERIES)
BEIGE BODY DRAIN VALVE
600
2 min utes and 52 sec onds ± 10 sec.
300
43 seconds ± 2 sec.
200
25 seconds ± 1 sec.
MONITORED LEG
Refers to the primary wire, to the cylinder, which
loops through the current sensing device on the main
PCB. This wire is terminated at the red cylinder plug
at the cylinder. Units with six primary wires to the
cylinder will monitor only one of the two wires,
terminating with red plugs.
RATED AMPS
RESET UNIT (HUMIDIFIERS)
This refers to amps listed on the humidifier
specification label.
To reset the humidifier, the on/off/drain switch at
the front of the humidifier should be switched to the off
position for a minimum of five seconds and then
switched back to the on position.
SHORT CYCLING
Occurs when the ‘on time’ of the humidifier is less
than ten minutes upon a call for humidity. To correct
short cycling, all humidifiers have a capacity
adjustment which allows the output of the humidifier to
be reduced as low as 25% of rated output, thus
extending the ‘on time’ required to maintain output.
Excessive short cycling may cause higher water
conductivity (mineral content) than the unit is designed
for.
-5-
OPTIONAL BLOWER PACK ( BUILT-ON OR REMOTE )
TRANSFORMER
( IF REQUIRED )
TWO SPEED SWITCH
3A
FUSE
FAN
RELAY
BLOWER
PACK
TERMINAL
BLOCKS
DEDICATED
DISCONNECT
BY OTHERS
SSS
L3 L2 L1
FAN
THERMODISC ( N.O. )
T
81 82 83 84 85
G
8 10
T
OPTIONAL HUMIDISTAT
or JUMPER
JUMPER OR
ON/OFF
CONTROLS
IN SERIES
GROUND
CLAMP
x x x
24 V
COIL
HIGH
LOW
RESETABLE
THERMODISC ( N.C. )
81 82 83 84 85
MOD
REMOTE
FAULT
32 30
61 20
-+
PRI. TERMINAL
BLOCK
TRANSFORMER
3 PHASE
CONNECTION
MAIN SWITCH
0N
1/3
STEP DOWN
TRANSFORMER
3A
FUSE
1/2
OFF
1/1
DRAIN
2/6
2/5
DOOR
SWITCH
2/4
24 V
COIL
24 V
COIL
DRAIN
FILL
CONTACTOR(S)
24 V
COIL
12 3
P4
12
P1
12
P3
12
P5
RL 1
1
P2 2
3
1 P8
5
P6
1234
GREEN LAMP
YELLOW LAMP
CYLINDER
SGH HUMIDIFIER
w OR w/o OPTIONAL BLOWER PACK ( BUILT-ON OR REMOTE )
WIRING DIAGRAM NO. SGH0001 Rev. C
-7-
LIMITED WARRANTY
Liebert Corporation (hereinafter collectively referred to as THE COMPANY),
warrant for a period of two years from date of shipment, that THE COMPANY’s
manufactured and assembled products, not otherwise expressly warranted (with the
exception of the cylinder) are free from defects in material and workmanship. No
warranty is made against corrosion, deterioration, or suitability of substituted materials
used as a result of compliance with government regulations.
THE COMPANY’s obligations and liabilities under this warranty are limited to
furnishing replacement parts to the customer, F.O.B. THE COMPANY’s factory,
providing the defective part(s) is returned freight prepaid by the customer. Parts used
for repairs are warranted for the balance of the term of the warranty on the original
humidifier or 90 days, whichever is longer.
The warranties set forth herein are in lieu of all other warranties expressed or
implied by law. No liability whatsoever shall be attached to THE COMPANY until said
products have been paid for in full and then said liability shall be limited to the original
purchase price for the product. Any further warranty must be in writing, signed by an
officer of THE COMPANY.
THE COMPANY’s limited warranty on accessories, not of Liebert’s manufacture,
such as controls, humidistats, pumps, etc. is limited to the warranty of the original
equipment manufacturer from date of original shipment of humidifier.
THE COMPANY makes no warranty and assumes no liability unless the
equipment is installed in strict accordance with a copy of the catalog and installation
manual in effect at the date of purchase and by a contractor approved by THE
COMPANY to install such equipment.
THE COMPANY makes no warranty and assumes no liability whatsoever for
consequential damage or damage resulting directly from misapplication, incorrect sizing
or lack of proper maintenance of the equipment.
THE COMPANY retains the right to change the design, specification and
performance criteria of its products without notice or obligation.
Model #:
Serial #:
Cylinder #:
Cylinder Last Replaced:
_________________________
MTH/DAY/YR
_________________________
MTH/DAY/YR
_________________________
MTH/DAY/YR
LISTED
HUMIDIFIER
E65185
LIEBERT CORPORATION
1050 Dearborn Drive, P.O. Box 29186
Columbus, Ohio 43229
Tel: (614) 888-0246 • Fax: (614) 841-6882
LR-35859
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