Sussman MBA User manual

MBA Electric
Steam Generator
Installation, Operation and Maintenance Manual
A Division of Sussman-Automatic Corporation
PN 101141 Rev 2/06
43-20 34th Street, Long Island City, NY 11101
•
[phone]
•
1-800 238-3535
Fax: [phone]
•
www.sussmanboilers.com
•
Email: [email protected]
Model No. ___________________________ Power Circuit Voltage ___________________
Generator Serial No. __________________ Control Circuit Voltage __________________
National Board No____________________ Amps ________ Phase ________ Cy ________
IMPORTANT:
This data file contains the National Board Registration Certificate
approving your generator. It must be kept near the generator at all times.
KW Design Max. Work
Model Range Steam Rate BHP Pressure Pressure*
__________________________________________________________________________________________
MBA3 39 lbs./hr 0.3 100 PSIG 85 PSIG
__________________________________________________________________________________________
MBA6 618 lbs./hr 0.6 100 PSIG 85 PSIG
__________________________________________________________________________________________
MBA9 927 lbs./hr 0.9 100 PSIG 85 PSIG
__________________________________________________________________________________________
MBA12 12 36 lbs./hr 1.2 100 PSIG 85 PSIG
__________________________________________________________________________________________
MBA18 18 54 lbs./hr 1.8 100 PSIG 85 PSIG
__________________________________________________________________________________________
MBA20 20 60 lbs./hr 2.0 100 PSIG 85 PSIG
__________________________________________________________________________________________
*Line water pressure must be a minimum of 10 PSIG higher than generator operating pressure or you will require high pressure water feed
w/motor and pump.
Products Covered by this Manual

• LIQUID LEVEL / LWCO CONTROLLER
The electronic controller automatically maintains proper
water level, and shuts off the generator when water
supply in the boiler drops below a safe operating level.
• WATER LEVEL SIGHT GLASS
Allows constant observation of water level while
boiler is in operation.
• ON-OFF SWITCH
Complete with pilot light, for switching on the
generator.
• INTEGRAL ELECTRICAL CONTROL
Magnetic contactor energizes the element and is
integrally mounted in the control unit.
• BLOWDOWN/DRAIN VALVE
Facilitates emptying the pressure vessel during blowdown/drain sequence.
• J-BOX for motor/pump connection.
• LONG LIFE HEATING ELEMENTS
Industrial grade, heavy duty stainless steel heating elements equipped with one
piece resistance welded terminations for added strength and safety.
• OPERATING PRESSURE CONTROL
Operates automatically to maintain steam pressure within generator.
• MANUAL RESET PRESSURE CONTROL
Provides high limit pressure cut-out with manual reset.
• STEAM SAFETY VALVE
ASME Code valve, automatically opens to reduce pressure should excessive
steam cause pressure build-up.
• STEAM PRESSURE GAUGE
Allows visual observation of steam pressure over full range.
• ENERGY SAVING AND MINIMUM MAINTENANCE
Fully insulated pressure vessel minimizes heat loss and maximizes energy savings.
• EASY CONTROL MAINTENANCE
All controls and components are easily accessible. Fully-louvered openings avoid
component heat build-up.
• RUGGED CONSTRUCTION
Performance is insured for all typical industrial applications.
•
Pressure vessel rated at 100PSIG to ASME Section I, Code M and
National Board registered.
•
UL listed, CSA certified, built to NEC.
•
All units are physically identical and have a packed shipping weight of 125 lbs.
•
Units are trimmed at 100PSIG as standard. 15PSIG trim also available.
•
Incoming water line pressure must be 10 PSIG greater than generator
operating pressure. If not, a motor/pump must be used. Specify Sussman
MBA38002A high pressure water feed motor/pump system.
•
When ordering specify Model No., KW, Volts/PH and motor/pump if required.
•
Water Connection is 1/4 NPT. Steam outlet is 1/2 NPT.
MBA Electric Steam Generator Installation, Operation and Maintenance Manual
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2
Standard Features
Meeting Code Requirements
Component Identification Dimensional Information
201⁄2”
171⁄2”
177⁄8”
153⁄4”
Symbol Description
_____________________________
1Strainer
_____________________________
2 Water Solenoid
_____________________________
3Check Valve
_____________________________
4Drain Valve
_____________________________
5Steam Outlet
_____________________________
6Gauge Glass Assembly
_____________________________
7Safety Valve
_____________________________
8 Pressure Gauge
_____________________________
9Hi-Limit Pressure Control
_____________________________
10 Operating Pressure Control
_____________________________
11 Access Panel
_____________________________
12 On/Off Switch
Model KW Volts PH Amps PPH
MBA3 3120,208,240 125, 15, 13 9
MBA6 6208,240,480 317, 15, 8 18
MBA9 9208,240,480 325, 22, 11 27
MBA12 12 208,240,480 334, 29, 15 36
MBA18 18 208,240,480 350, 44, 22 54
MBA20 20 208,240,480 356, 49, 25 60

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3
Refer to National and all applicable Local Codes for specific installation requirements.
NOTE:
Reference heating element clearance requirements for particular boiler to allow for removal of
elements. Standard minimum suggested clearance is 21 inches.
1.
The boiler should be mounted on a solid level foundation.
2. All piping should be installed by a licensed plumber.
3.
When any type water feed other than a pump feed is used, the existing water supply pressure must be 10 PSIG greater
than boiler operating pressure to assure water supply maintains proper water level in boiler. Lack of water can result in
improper boiler operation. Keep feed water valves open at all times during normal operation.
4. Connect steam line with customer supplied outlet valve to boiler steam outlet.
5.
During normal operation, keep drain valve closed.
6.
If pump and boiler are plumbed within 30 ft (pipe length), a minimum of two check valves are required on boiler
to avoid damage to pump.
NOTE:
THE SAFETY VALVE SHALL NOT BE PLUMBED WITH A DRAIN LINE SIZED LESS THAN
THE OUTLET SIZE OF THE SAFETY VALVE.
Ground boiler according to National Electric Code requirements to avoid shock.
Use proper sized wire. Power wiring to boiler should be in accordance with Local and N.E.C.
requirements following wiring diagram supplied. Wire size specified adjacent to field wiring terminal block(s).
Use 90˚ C copper wire only.
Purchaser should use a disconnect switch employing circuit breakers or fuses between the main power source and the boiler.
Boilers are susceptible to lightning damage because of plumbing water lines. Industrial type
lightning/surge protectors should be installed according to the manufacturer's recommendation
at your service entrance. Consult your contractor or electrical dealer.
1.
The unit is pre-wired and tested. Connect control circuit voltage at the control circuit terminal block.
2.
With the main power off, make sure that all wiring terminations are tight to avoid arcing, carbonizing and/or overheating of
contacts.
Substitution of components or modification of wiring systems voids the warranty and
may lead to dangerous operating conditions.
3.
Instructions for water feed control system (i.e. motor and pump or solenoid feed).
a.
Check the voltage of the motor or solenoid before making electrical connection.
b.
The water feed circuit should be wired to the junction box provided.
c.
Motors rated greater than 1/3HP or are not 120VAC single phase require the use of suitable motor starter.
d.
Amperage/Wire Size – For correct sizing refer to the label on the boiler located next to the field wiring terminals.
This label states the wire size (AWG or MCM), minimum temperature rating (90˚C) and conductor material (copper only).
Deviation from this information may result in improper or unsafe boiler operation.
Installation
Wiring

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MBA Steam Wiring Control Circuit Wiring Diagram
Replacement Heating Elements
Part No. Description Phase
_________________________________________
29031A 3KW, 120V 1
_________________________________________
29031B 3KW, 208V 1
_________________________________________
29031C 3KW, 240V 1
_________________________________________
29061B 6KW, 208V 1
_________________________________________
29061C 6KW, 240V 1
_________________________________________
29063A 6KW, 208V 3
_________________________________________
29063B 6KW, 240V 3
_________________________________________
29063C 6KW, 240V 3
_________________________________________
29063F 6KW, 480V 3
_________________________________________
29091B 9KW, 208V 1
_________________________________________
29091C 9KW, 240V 1
_________________________________________
29093B 9KW, 208V 3
_________________________________________
29093C 9KW, 240V 3
_________________________________________
29093F 9KW, 480V 3
_________________________________________
39121B 12KW, 208V 1
Part No. Description Phase
_________________________________________
39121C 12KW, 240V 1
_________________________________________
39123B 12KW, 208V 3
_________________________________________
39123C 12KW, 240V 3
_________________________________________
39123F 12KW, 480V 3
_________________________________________
39181B 18KW, 208V 1
_________________________________________
39181C 18KW, 240V 1
_________________________________________
39183B 18KW, 208V 3
_________________________________________
39183C 18KW, 240V 3
_________________________________________
39183F 18KW, 480V 3
_________________________________________
39201B 20KW, 208V 1
_________________________________________
39201C 20KW, 240V 1
_________________________________________
39203B 20KW, 208V 3
_________________________________________
39203C 20KW, 240V 3
_________________________________________
39203F 20KW, 480V 3

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5
LWCO/PUMP CONTROL, OPERATION AND TESTING
1.
All valves for incoming water supply are to be fully opened. Main disconnect switch to be in "ON” position. Boiler switch to be in
"ON" position. Since boiler will be empty, pump (or solenoid) will be energized allowing boiler to fill with water. Control will allow for
automatic reaching of proper water level. Contactors will be energized, applying voltage to heating elements.
2.
Pump Switch Operation – At this point, water should be visible approximately halfway up sight glass. Slowly open drain valve located
at bottom of boiler. Water level will fall, allowing low water cutoff/pump control to energize feed water system. Close drain valve for
proper operation.
3. Low Water Cut-Out Switch Performance. Open drain valve completely. Maintain this condition until water level falls within gauge glass
enough to cause low water cut-out switch to de-energize heating elements. Contactor will be in the de-energized state at this time.
Close the drain valve. For automatic resetting type low water cut-out switches, feed system will return water level to normal. Boiler is
now qualified for proper low water cut-out and normal liquid-level operating conditions.
PRESSURE CONTROLS OPERATION AND TESTING
NOTE:
ALL MBA STEAM BOILERS ARE PROVIDED WITH ONE HI-LIMIT PRESSURE CONTROL AND ONE OPERATING
PRESSURE CONTROL.
1.
All pressure controls are equipped with a screw allowing for setting of the desired operational and hi-limit pressures.
To reduce pressure setting, rotate screw in direction which allows indicator to point to a lower pressure setting.
NOTE: IT IS RECOMMENDED THAT THE HI-LIMIT CONTROL BE SET 1O PSIG ABOVE DESIRED NORMAL
OPERATION PRESSURE.
2.
A differential pressure can be obtained on all automatic re-setting operating pressure controls in the same manner as operating
pressure control is set. Differential indicated pressure below the main operating maximum pressure the pressure control will reset.
3.
Pressure Control Operating Check – Close steam outlet valve (by customer) and adjust operating pressure control to a low pressure
setting. Set hi-limit control at 10 PS1G above that setting. Switch boiler on to allow for steam pressure build-up. Pressure gauge
reading will build and the operating pressure control will shut off boiler at its pressure setting. Re-setting of operating pressure control
is accomplished by bleeding off pressure through steam outlet valve (by customer) and allowing pressure to drop below set point.
4.
Hi-limit Pressure Control Check – See item 3 above but, in doing so, assure for this test purpose only,that the operating control is
set above the pressure setting of the hi-limit control. The hi-limit trip will de-energize the contactors. Resetting of the hi-limit occurs
after bleeding steam to reduce pressure inside the boiler.
TO AVOID IMPROPER OR UNSAFE CONDITIONS, INSURE OPERATING PRESSURE CONTROL IS
RESET TO PROPER DESIRED BOILER OPERATING PRESSURE.
ONLY WITH MAIN DISCONNECT “OFF”, TIGHTEN ALL ELECTRICAL CONNECTIONS BEFORE ENERGIZING
BOILER TO PREVENT ARCING, CARBONIZING OF CONTACTS AND/OR OVERHEATING.
1.
Turn on water supply. Turn main switch on. Turn boiler switch to ON position. When water appears approximately halfway up the
gauge glass, the pump or solenoid feed will automatically shut off and the contactors will switch on.
2.
Operation of Low Water Cut-Off – The boiler is equipped with a probe type liquid level control which is coupled to an electronic
controller (pc board).
3.
The automatic reset operating pressure control has a visual pressure adjustment. The top screw of the control adjusts the scale in the
large indicator window. By turning the screw, the pressure setting can be adjusted. Selection of desirable pressure is very easily made.
Some pressure controls have an additional screw for adjustment of pressure differential (OFF/ON pressure operating range) which is
factory set at the maximum allowable rating.
4.
Close steam outlet valve. Boiler will build up to desired pressure and shut off automatically.
5.
High Pressure Control – This control will de-energize the boiler should pressure within the boiler exceed the set pressure.
6.
Slowly open steam outlet valve and use steam as needed.
7. Boiler should be blowndown daily (see blowdown instructions on page 6).
Pre-Operation Check - All Boilers
Operation

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6
Blowdown is an essential part of boiler operation. It is one of the best preventative maintenance steps you can take. Make sure a blow-
down schedule is established and followed regularly.
In hard water areas, blowdown is necessary at least once a day. In soft water areas, once a week. If there is a particular problem
which applies to your own local water condition other than mineral content, take this into consideration in determining which
schedule is to be followed.
1.
At the end of the working day, while boiler is still operating, turn switch to the OFF position and close water supply valve.
De-energize wall mounted safety switch.
2.
It is preferable to connect the blowdown valve directly into a drainage system when allowed by local codes.
If this is done, the boiler can be discharged at operating pressure. Consult local plumbing codes before doing so.
3.
If blowing-down into a receptacle, allow pressure to decrease to 15-20 PSIG before opening blowdown valve.
4.
When discharge is complete and boiler is drained:
1. Close the blowdown valve 3. Put boiler switch in the ON position
2. Open water supply valve; 4. Close wall mounted safety switch.
5.
When refilling is complete, turn off the boiler switch unless further operation is desirable.
6. If you have been supplied with a Manual Reset Low Water Control as required in some states, the reset button on the
control must be pushed before boiler will begin developing pressure. (Do not push reset until boiler has filled with water.)
The use of chemical boiler cleaning compounds in these boilers will void all warranties unless approved by the manufactur-
er. Some compounds will damage long life incoloy heating elements resulting in a shorter life.
HAZARD OF ELECTRICAL SHOCK. DISCONNECT ALL POWER BEFORE WORKING ON BOILER.
Sussman Electric Steam boilers are designed for years of trouble-free performance. To establish a good preventative maintenance
program, we suggest that the building maintenance person or engineer familiarize themselves with these simple rules.
1.
The use of chemical boiler cleaning compounds voids all warranties. We recommend that a reputable firm of water treatment
engineers be consulted regarding conditioning boiler water. Proper selection must be made of a compound to prevent damage to
heating elements.
2.
The sight glass should be checked daily to ensure that boiler has adequate water.
3.
A monthly inspection should be made of the internal wiring. All electrical connections should be checked for tightness.
A check for water leaks should also be made and any loose fittings immediately tightened.
4.
Every four months, the low water cut-off and pump control should be checked to insure that it is functioning properly.
5.
Every four months, the probe and isolator should be checked for deposits and cleaned, if necessary. This is accomplished by remov-
ing the inspection plate, removing the probe (with a standard socket wrench) cleaning and replacing.
NOTE: THE SYSTEM WILL NOT OPERATE IF THE BOILER IS USING DISTILLED, DEMINERALIZED, DEIONIZED WATER
OR REVERSE OSMOSIS.
6.
Every four months, the heating elements should be removed. If scale has begun to form, the element should be cleaned
and the boiler should be drained and flushed.
NOTE: NEW BOLTS AND GASKET SHOULD BE USED WHEN RE-INSTALLING THE ELEMENT TO ASSURE
PROPER SEALING.
Blowdown
Maintenance

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7
IMPORTANT NOTE: Read all warnings and instruc-
tions before performing installation or maintenance.
Safety glasses and gloves should be worn at all times
when working with or examining water gauge glass
and connections. Pressure in generator to be at zero
before proceeding. Improper installation or mainte-
nance of gauge glass and connections can cause imme-
diate or delayed breakage resulting in bodily injury
and/or property damage.
1.
Apply Teflon tape or pipe dope to pipe threads.
Install top gauge fitting (fitting without a drain
valve) into the uppermost tapping. Wrench tighten
the fitting until it is snug and the glass outlet is
pointing at five o'clock (about 1/8 turn from its final
downward vertical position).
2.
Install the bottom gauge fitting (the fitting with a
drain valve) until it is snug and the glass outlet is
pointing directly upward. Verify top and bottom fit-
tings are threaded into the tappings the same num-
ber of turns (distance A= distance B).
3.
Remove glass packing nut, friction washer (or pack-
ing gland, depending upon the model), and glass
packing from the fittings, and place them, in the
same order, on to both ends of the gauge glass.
Push both packings about an inch up the gauge
glass.
4.
Gently insert one end of the glass into the top
gauge fitting. Keeping the glass inside the top fit-
ting, gently rotate the top gauge fitting clockwise
until vertically aligned with the bottom gauge, then
insert glass into bottom fitting until glass bottoms
out on the shoulder inside the bottom fitting.
5.
Carefully raise glass about 1/16" and slide lower
glass packing down until the glass packing contacts
the lower gauge fitting. DO NOT allow the glass to
remain in contact with any metal!
6.
Carefully slide upper glass packing up as far as possible.
7.
Hand tighten both glass packing nuts, then tighten 1/2 turn more by wrench. Tighten only enough to pre-
vent leakage. DO NOT OVER TIGHTEN!
If any leakage should occur, tighten lightly, a quarter turn at a time, checking for leakage after each turn.
IMPORTANT NOTE:
Read all warnings and instructions before performing installation or maintenance.
Safety glasses and gloves should be worn at all times when working with
or examining water gauge glass and connections.
Pressure in generator to be at zero before proceeding.
Improper installation or maintenance of gauge glass and connections can cause
immediate or delayed breakage resulting in bodily injury and/or property damage.
Gauge Glass Installation
Vessel Wall
Gauge Glass
Glass Packing
Nut
Glass Packing
Top Gauge
Fitting
Guard Rod
Friction Washer
(or Packing Gland)
Bottom
Gauge
Fitting
Drain Valve
A
B

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8
Gauge Glass Installation - Use and Care
DO NOTs
DO NOT use glass if it contains any scratches, chips, or any other visible signs of damage.
DO NOT reuse any tubular glass or glass packings.
DO NOT subject gauge glass to bending or torsional stresses.
DO NOT over tighten glass packing nuts.
DO NOT allow glass to touch any metal parts.
DO NOT exceed the recommended pressure of the gauge or gauge glass.
DO NOT clean the gauge or gauge glass while pressurized or in operation.
DO's
DO verify proper gauge has been supplied.
DO examine gauge glass and packings carefully for damage before installation.
DO install protective guards and utilize automatic ball checks where necessary to help prevent injury
in case of glass breakage.
DO inspect the gauge glass daily, keep maintenance records, and conduct routine replacements.
DO protect glass from sudden changes in temperatures such as drafts, water spray, etc.
MAINTENANCE
Examine the gauge glass regularly for any signs of clouding, scratching, erosion, or corrosion. The glass should be
inspected daily until the need for replacement becomes apparent. This will help establish the routine inspection
and routine replacement schedules.
CLEANING
Use commercial non-abrasive glass cleaners to keep glass clean. Use diluted acids such as Hydrochloric (muriatic)
acid when regular cleaners do not seem to work. Do not use wire brushes or any other abrasive materials which
could
scratch the glass.
INSPECTION
Examine the surface of the glass for scratches, corrosion, chips, cracks, surface flaws, or nicks. To do this, shine a
very bright concentrated light at an angle of about 45 degrees.A defective glass will glisten as the light strikes
imperfections. Glass which appears cloudy or roughened, and will not respond to cleaning, should be replaced.
STORING
Keep gauge glass in original packaging until ready to install.

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9
Element Replacement
R E A D I N S T R U C T I O N S C O M P L E T E LYB E F O R E S TA RT I N G W O R K
Before Installing your new elements be sure the
McDonnell Miller low water cut-off and aux. low
water cutoff (if supplied) is operating properly. The float chamber and
lower equalizer column of the MM control must be completely clear of
sludge or other foreign matter. Failure to do this may cause the immedi-
ate burn-out of the new elements. If the unit is probe equipped, check
condition of the probes and isolator.
All elements are thoroughly checked before shipment The manufacturer
cannot be responsible for burn-outs caused by a faulty low water cut-off.
The lower equalizer column can best be examined by breaking the unions
on either side and then visually and manually examining the piping with
your finger or probes to see if it is clear and clean.
1.
Disconnect boiler from electric power supply at main safety switch or fuse panel.
Then turn boiler switch to “OFF" position.
2.
Close water supply valve on incoming water supply line. Drain boiler completely of water.
3.
Open boiler door to access heating element.
4.
Disconnect wire (electric) leads connecting element to main power system of boiler.
Again, note wire connections to facilitate re-assembly. Proceed to remove and discard
(6) bolts from flange.
IMPORTANT:
Note the wire connections to facilitate re-assembly (see wiring schematic).
Remove and discard six (5/16"-18) bolts from flange. Do not reuse these bolts.
5.
Thoroughly clean boiler flange of all foreign material. Be certain no part of old gasket
remains on flange.
6.
Apply "Slic-Tite" Gasket Compound (or equal) to both surfaces of new gasket supplied
with replacement element. Proceed to install element flange assembly with gasket
between boiler flange and element flange. In doing this, be careful to align flange holes
so element wire connection terminals on element assembly are in line with previously
disconnected wire leads to facilitate easy connections.
NOTE:
Observe markings on element flange. Install element marking “TOP” on top.
7.
Use only new element flange bolts. Tighten all (6) element flange bolts to a torque value
of 22 lb-ft each (see illustration).
8.
Connect all wires to the terminals. Tighten all element terminals to a torque value of
20 lb-in each (see illustration). Make sure all wires are clean and bright to assure good
electrical contact.
9.
Check that the wires are correctly connected to the contactor terminals and are tightened
to a torque value of 45 lb-in. (see illustration). Make sure all wires are clean and bright to
assure good electrical contact.
10.
Open water valve to allow water supply to reach boiler feed mechanism.
11.
As boiler automatically refills, observe the new flange assembly for possible leaks. If water
is noticed, the bolts must be re-tightened. Before doing this, turn the boiler off at the
main fuse safety switch.
12.
When boiler reaches working pressure, check flange assembly again for leaks.
Avoid use of chemical cleaning compounds.
Follow maintenance instructions provided with the boiler.
Torque Values:
Element Flange Bolts: 22 lb-ft
Element Terminals: 20 lb-in
Contactor Terminals: 45 lb-in
For Illustrative Purposes Only.
Power wiring shown in approximate
factory-installed location
TORQUE VALUES
________________________________________
Element Flange Bolts 22 lb-ft
________________________________________
Element Terminals 20 lb-in
________________________________________
Contactor Terminals 45 lb-in
Torque
Wrench
Torque
Wrench
Torque
Wrench
Boiler with
McDonnell Miller
11⁄2”
1” Steam Equalizing Pipe
Pump and Low Water Control
Normal Boiler Water Line
Cut-Off Level is Arrow Mark
Blowdown Valve
1” Water Equalizing Pipe

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10
Water Quality Information for Carbon Steel Boilers
FOR OPTIMUM RESULTS, THE FEEDWATER SUPPLY SHOULD BE TESTED PRIOR TO INITIAL STARTUP, IF THE MINERAL
CONTENT EXCEEDS THE FOLLOWING RECOMMENDED LIMITS, VARIOUS EXTERNAL TREATMENT PROCESSES
(WATER SOFTENER, REVERSE OSMOSIS, ETC,) MAY BE USED TO CORRECT THE PROBLEM.
NOTE:
AN ANALYSIS OF THE ON-SITE BOILER FEEDWATER MUST BE MADE BY A RECOGNIZED AND RELIABLE
WATER TREATMENT COMPANY TO ASCERTAIN THE EXISTING CONDITION AND TREATMENT REQUIRED.
RECOMMENDED FEEDWATER QUALITY
HARDNESS, ppm 8 – 85 (~0.5 – 5 gpg)
P-ALKALINITY, ppm 85 – 410 (~5 – 24 gpg)
T-ALKALINITY, ppm 200 – 500 (~7 – 0 gpg)
pH (strength of alkalinity) 8.0 – 11.4
SPECIFIC RESISTIVITY ~50k Ω-cm (50,000 ohm-centimeter)
BLOW DOWN BOILER ON AT LEAST A ONCE A DAY BASIS. IF BOILER WATER OR FEEDWATER ARE OUTSIDE THE
ABOVE LIMITS, A MORE FREQUENT BLOWDOWN IS REQUIRED.
RECOMMENDED LIMITS WITHIN A BOILER
TOTAL DISSOLVED SOLIDS, ppm 3500
TOTAL ALKALINITY, ppm 850
SUSPENDED SOLIDS, ppm 300
SILICA (Si02), ppm 125
SULFITE (SO3), ppm 25–50
PHOSPHATE, ppm 30–60
P-ALKALINITY AS CaCO3, ppm 900
IRON, ppm 2
WATER QUALITY CAN AFFECT EFFICIENCY OR RESULT IN BOILER DAMAGE IF NEGLECTED. BOILER FEEDWATER
CONTAINS IMPURITIES IN SOLUTION AND SUSPENSION. THESE IMPURITIES CONCENTRATE IN THE BOILER SINCE THE
STEAM GENERATED IS ESSENTIALLY PURE. THE CONCENTRATION OF THESE IMPURITIES INCREASES AS MORE FEED-
WATER IS INTRODUCED INTO THE BOILER AND STEAM IS PRODUCED. IF THE SUSPENDED SOLIDS ARE ALLOWED TO
CONCENTRATE BEYOND CERTAIN LIMITS, A DEPOSIT OR "SCALE" WILL FORM ON THE BOILER INTERNAL SUR-
FACES. THIS DEPOSIT CAN INTERFERE WITH PROPER BOILER OPERATION AND CAUSE BOILER FAILURE.
THE CONCENTRATION OF THESE IMPURITIES IS GENERALLY CONTROLLED BY THE FEEDWATER QUALITY AND BY
BLOWDOWN. BLOWDOWN REFERS TO REMOVING A PORTION OF THE BOILER WATER WITH HIGH SOLIDS CON-
CENTRATION AND REPLACING IT WITH MAKEUP WATER OF A LOWER CONCENTRATION.
Rev 01/06