Slant/Fin Liberty II LD-20 Installation And Operating Instructions Manual
LIBE RTY II
®
OIL-FIRED WATER AND STEAM KNOCKED DOWN BOILERS
AND BOILER/BURNER UNITS/NO. 2 OIL
See publication LD-41K for assembly and parts and publication LD-42KB for approved oil burners.
INSTALLATION AND OPERATING INSTRUCTIONS
SAFETY WARNING:
KEEP BOILER AREA CLEAR AND FREE FROM
COMBUSTIBLE MATERIALS, GASOLINE AND
OTHER FLAMMABLE VAPORS AND LIQUIDS.
FAILURE TO ADHERE TO ABOVE SAFETY WARNING, MAY RESULT IN PERSONAL INJURY OR
DEATH AND PROPERTY DAMAGE.
CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PAGE
Assembly . . . . . . . . . . . . . . . . . . . . . . .see pub. #LD-41K
Ratings and Dimensions . . . . . . . . . . . . . . . . . . . . . . . .2
Installation Requirements:
Boiler Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Chimney Requirements . . . . . . . . . . . . . . . . . . . . . . .3
Air Supply and Venting . . . . . . . . . . . . . . . . . . . . . . .3
Controls and Accessories . . . . . . . . . . . . . . . . . . . . .4
Piping for Steam Boilers . . . . . . . . . . . . . . . . . . . . . .4
Blowing Off a Steam Boiler . . . . . . . . . . . . . . . . . . . .4
Cleaning Piping System . . . . . . . . . . . . . . . . . . . . . .5
Piping for Water Units . . . . . . . . . . . . . . . . . . . . . . . .5
Piping for Tankless Heater . . . . . . . . . . . . . . . . . . . .5
Installing Burner . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Oil Supply Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Wiring the Boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Vent Piping and Draft Regulator . . . . . . . . . . . . . . . .6
Operating Instructions:
Precautions Before Starting . . . . . . . . . . . . . . . . . . .6
Start up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Cleaning and Filling New
Water Boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Steam Boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Low Water Cut-off check-out . . . . . . . . . . . . . . . . . . .8
Pressure Control check-out . . . . . . . . . . . . . . . . . . . .8
Replacement of Steam Boiler . . . . . . . . . . . . . . . . . .8
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-12
Burner Data . . . . . . . . . . . . . . . . . . .see pub. # LD-42KB
Care and Maintenance:
Extended Shutdown . . . . . . . . . . . . . . . . . . . . . . . .13
Freezing Protection . . . . . . . . . . . . . . . . . . . . . . . . .13
Oil Burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
General Maintenance . . . . . . . . . . . . . . . . . . . . . . .13
IMPORTANT: The installation of this equipment must
conform to the requirements of the authority having jurisdiction or, in the absence of such requirements, to
the installation of Oil Burning Equipment, ANSI/NFPA
31, latest edition, and to the National Electrical Code
ANSI-NFPA 70, latest edition. The installation must
also conform to the additional requirements in this
Slant/Fin Instruction Manual. Where there is any difference, the more stringent requirement shall govern.
IMPORTANT: This boiler must be installed by a
trained, experienced, service technician, licensed for
the installation and servicing of oil burning equipment or
otherwise qualified by the authorities having jurisdiction
over the installation.
In addition, where required by the authority having jurisdiction, the installation must conform to American
Society of Mechanical Engineers Safety Code for
Controls and Safety Devices for Automatically Fired
Boilers, No. CSD-1, latest edition.
THIS MANUAL MUST BE LEFT WITH OWNER
AND SHOULD BE HUNG ON OR ADJACENT TO
THE BOILER FOR REFERENCE.
Printed in U.S.A. 0402 Publication No. LD-43K
Part No. 43-0268
2 LIBERTY
3
TAPPINGS AND OPENINGS
Tapping Loc. Steam Boiler
1
A* 2” supply onn rear section *
1
3
4
8
9
0 1/2” low limit for tankless
1
1A 1/2” tankless inlet
1
1B 1/2” tankless outlet
1
2 1/2” steam gauge glass & 67 LWCO
1
3 1-1/2” bushed to 3/4” for drain cock
1
14 1-1/2” condensate return
Flue Collector
Front Section
4
3” supply
3/4” steam safety valve
1/4” siphon, pressure gauge & pressure cut-out
3/4” alternate electronic low water cut-off
1-1/2” skimmer tapping
Tapping Loc. Water Boiler
1 1-1/2” supply
2 3/4” air vent or expansion tank
3 3/4” water relief valve
5A 1/2” tankless inlet
5B 1/2” tankless outlet
6 1/4” pressure temp. gauge
7 1/2” high limit, hi/lo or combination control
13 1-1/2” return & 3/4” drain cock
14 1-1/2” alternate return
2
T
OP VIEW
FRONT
Figure 1
RONT VIEW WATER
F
6
1
3
1
REAR 14
5A
B
5
7
FRONT
1
3
FRONT VIEW STEAM
11A
11B
0
1
REAR 14
* Rear section LD-50, LD-60, LD-70
steam boilers only.
12
1A*
DIMENSIONS
9
8
8
Figure 2
RATINGS
I=B=R Chimney Size
Nom. Rect.
I.D. Round
x Height §
(in x in x ft)
x Height
(in x ft)
A.F.U.E.
%
Water Steam
Boiler
Model
No.*
I=B=R Burner
Capacity
Oil Input
GPH† BTUH
D.O.E.
Heating
Capacity
MBH
Water Steam
Water
MBH *
I=B=R
Net Ratings
Steam
MBH *
Steam
Sq. Ft.
LD-20 0.75 105,000 90 79 8 x 8 x 15 5 x 15 83.50 111⁄2 89⁄326❏ 11⁄4 241⁄4 2 2.20
LD-20 BK 0.95 133,000 110 96 8 x 8 x 15 5 x 15 81.76 11
LD-30H 1.00 140,000 121 105 8 x 8 x 15 6 x 15 86.00 14
LD-30
1.10 154,000 134 134 117 101 421 8 x 8 x 15 6 x 15 84.85 84.15 14
1.25 175,000 151 131 8 x 8 x 15 6 x 15 83.50 14
LD-40H 1.50 210,000 182 179 158 134 558 8 x 8 x 15 7 x 15 86.00 84.00 18
LD-40
1.60 224,000 195 195 170 146 608 8 x 8 x 15 7 x 15 84.45 83.80 18
1.80 252,000 218 190 8 x 8 x 15 7 x 15 83.33 18
LD-50H 2.00 280,000 243 239 211 179 746 8 x 8 x 15 8 x 15 86.00 84.00 21
LD-50
LD-60
LD-70
*
2.10 294,000 256 255 223 191 796 8 x 8 x 15 8 x 15 84.06 83.45 21
2.35 329,000 272§ 237 8 x 12 x 15 8 x 15 21
2.60 364,000 298§ 298§ 259 224 933 8 x 12 x 15 10 x 15 25 15
2.85 399,000 327§ 284 8 x 12 x 15 10 x 15 25 15
3.10 434,000 352§ 354§ 306 266 1108 8 x 12 x 15 10 x 15 28
3.35 469,000 381§ 331 8 x 12 x 15 10 x 15 28
Ratings are based on light oil at 140,000 Btu per gallon, and apply only when burner
Standard working pressure 30 PSI water, 15 PSI steam.
All boilers hydrostatically tested - A.S.M.E.
For forced hot water heating systems where the boiler and all piping are located within
the area to be heated, the boiler may be selected on the basis of gross D.O.E. capacity
output. The net I=B=R output ratings shown are based on an allowance for piping and
pickup of 1.15 (water) or 1.33 (steam). D.O.E. capacity gross output is divided by the
allowance to obtain net rating. The manufacturer should be consulted before selecting
a boiler for unusual piping and pickup requirements such as intermittent system operation extensive piping, etc.
¶
models listed in publication no. LD-42KB are used, and are properly adjusted to produce
13% CO
†
‡
§
❏
2.
Nominal clay tile liner dimensions.
Tankless heater rating based on intermittent draw.
I.B.R. gross output.
Collar is oblong, will fit 6” diameter nominal connector.
NOTE: All boilers under 300,000 Btuh input are tested and rated for capacity under the
U.S. Department of Energy (D.O.E.) Test Procedures for Boilers
Dimensions (inches)
Return
Front to
Boiler
Length
“A”
1
⁄2 89⁄32 6❏ 11⁄4 241⁄4 2 2.40
7
⁄8 101⁄32611⁄4 275⁄8 3 3.10
7
⁄8 101⁄32 611⁄4 275⁄8 3 3.20 3.00
7
⁄8 101⁄32 611⁄4 275⁄8 3 3.40
1
⁄4 1123⁄32 711⁄4 31 4 3.80 3.40
1
⁄4 1123⁄32 711⁄4 31 4 3.90 3.50
1
⁄4 1123⁄32 711⁄4 31 4 4.15
5
⁄8 1313⁄32 811⁄2 343⁄8 5 4.30 3.90
5
⁄8 1313⁄32 811⁄2 343⁄8 5 4.40 4.00
5
⁄8 1313⁄32 811⁄2 343⁄8 5 4.70
3
⁄8 1625⁄32 9 411⁄8 7 5.45 5.00
3
⁄8 1625⁄32 9 411⁄8 7 5.70
Flue
Flue ¢
“B”
Circulator
Dia.
“C”
3
⁄32 811⁄2 373⁄4 6 4.90 4.50
3
⁄32 811⁄2 373⁄4 6 5.20
Flange
‘D”
Overall
Length
“E”
Boiler
Sect.
Tankless
Heater
GPM * *
Water Steam
LIBERTY
BOILER LOCATION
Provide a level, solid foundation for the boiler. Location should be
near the chimney so that the Flue Pipe Connector or Breeching to
the chimney is short and direct.
A. The foundation must be capable of supporting the weight of the
boiler when filled with water:
Boiler
Size
Approximate Total Weight of Boiler
Assembly, filled with water
LD-20 440
D-30 550
L
LD-40 660
LD-50 785
LD-60 895
LD-70 1000
B. The Liberty Boiler has full wet base sections which surround
fire-box for maximum heat absorbtion of burning fuel, and low
floor temperature.
C. If boiler is to be located over buried conduit containing electric
wires or telephone cables, consult local codes or the National
Board of Fire Underwriters for specific requirements.
MINIMUM CLEARANCE
Provide accessibility clearance of 24” from surfaces requiring
servicing (top and front) and 18” on any side requiring passage. The
boiler shall be installed with the following MINIMUM
clearances from combustible materials:
A. CHIMNEY CONNECTOR -18”
B. BACK AND SIDES - 6” EXCEPT as limited by 18” clearance
from chimney connector.
NOTE: Except in closets and alcoves, clearances above in (A) and (B)
may be reduced by providing forms of protection as specified in
NFPA31, latest edition.
CHIMNEY REQUIREMENTS
A. The chimney must be constructed in accordance with all local
applicable codes and the National Board of Fire Underwriters.
See boiler models and rating table shown on page 2 for
chimney sizes.
B. Check chimney condition.
Existing chimneys and stacks may have deteriorated; without re-
3
pairs their use would be hazardous. Before connecting to an
old chimney or stack.
1. Clean it.
2. Inspect it thoroughly.
3. Remove obstructions.
4. Replace worn secctions of metal stacks.
5. Seal bad masonry joints.
6. Repair damaged linings.
C. Where more than one appliance vents into a common chimney,
the area of teh common breeching should at least equal the
area of the largest appliance flue plus 50% of the additonal flue
areas.
D. Breeching area must not be reduced at connection into chim-
ney. Breeching must be inserted into, but not beyond, inside of
chimney liner.
E. Chimney height shall extend at least 3 feet above where it
passes through the roof of the building, and at least 2 feet
above any ridge within 10 feet of the chimney.
F. The use of a vent cap, where permitted by code, gives addition-
al protection against adverse wind conditions and precipitation.
G. Flue Connection: Connect flue pipe between top of boiler and
chimney. Horizontal sections of flue pipe must be pitched upward to the chimney at least 1/4” per foot. Flue must be inserted
into, but not extend beyond, the inside wall of the chimney flue.
Install draft regulator in flue pipe, as shown in figure 3.
AIR SUPPLY AND VENTING
Sufficient air for combustion and ventilation in the boiler room must
be provided. Failure to do this will result in poor combustion, heavy
spptomg and health hazards. Any oil-fired boiler must have a steady
draft* and an ample supply of combustion air at all times during firing.
If air supply or chimney draft* is unreliable, CO2and overfire draft* will
change unpredictably.
DO NOT vent this boiler to the same chimney flue used by a fireplace
or coal or wood burning furnace or boiler. The draft* produced by solid
fueled devices varies tremendously between high fire and low fire:
In modern, weatherstripped, energy-saving buildings, natural infiltration may not supply enough air for combustion, particularly if other
fuel-burning appliances, exhaust fans or draft inducers are competing
for the same air supply. Fireplaces and other solid fuel burning appliances consume great quantities of air while at high
BAROMETRIC DRAFT REGULATOR
INSTALLED ON HORIZONTAL CONNECTOR
BAROMETRIC DRAFT REGULATOR
INSTALLED ON VERTICAL RISE
Figure 3.
Barometric
Draft
Regulator
4 LIBERTY
fire; if air supply is not ample, such an appliance will creat a downdraft in the oil fired boiler flue: DO NOT operate this boiler and a
solid fuel burning appliance at the same time, unless the solid fuel
burner is provided with it’s own outside air supply.
FOR THIS BOILER ONLY, a grilled opening within 12” of the floor
near the boiler, direct to or ducted to outside, sized to 140 sq. inch
per GPH nozzle size, is recommended for air supply. If such a direct
outside air supply is not provided, CO2and overfire draft must be
checked (refer to STARTUP) after closing all doors and windows that
will be closed on the coldest day, and operating all fuel burning
appliances including this boiler for at least 30 minutes of cotinuous
operation.
If fly screen must be used over air supply openings, areas calculated
should be doubled; the screen should be inspected and cleaned frequently to maintain free air flow.
Protect air openings against closure by snow, debris, etc. Openings
such as doors or windows, if used, must be locked open.
The opening size recommendation just given is for guidance only. It
is an installation responsibility to provide air for combustion and
ventilation to all appliances, under all operating conditions, for each
installation.
*Draft is negative or suction pressure.
INSTALLING CONTROLS AND ACCESSORIES
ON BOILER UNITS
Notes: Jacket must be installed on boiler units prior to installation
of trim.
I. STEAM BOILER TRIM, see page 2 for tapping locations, and fig-
ure 5 for illustration of steam boiler.
Figure 4.
A. Steam pressure gauge and pressure cut-out, install in tapping
no.4, figure 4.
B. Gauge glass set - use tapping no. 12.
C. Pop safety valve - use tapping no. 3, piped full size to boiler; or
pipe full size into a valveless steam header.
D. Combustion safety control - mounted on burner.
II. WATER BOILER TRIM, see page 2 for tapping locations, and
figures 1 and 2 for illustration of water boiler.
A. Pressure-temperature-Altitude gauge - use tapping no.6.
B. High temperature limit - use tapping no. 7.
C. Operating control (if used) - use tapping no. 7.
D. Water relief valve - use tapping no. 3, piped full size to boiler.
E. Automatic air vent or compression tank tappings - if used, install
in tapping no. 2.
F. Combustion safety control - mounted on burner.
PIPING FOR STEAM BOILERS
Provide Header and Hartford Loop as suggested. Local codes apply.
BLOWING OFF A LOW PRESSURE STEAM BOILER
A. A 1-1/2” NPT is provided in the front of the boiler (tapping no. 9,
figure 1) for use as a surface blow down to provide rapid skimming
of oil and grease which accumulate on the surface of the water.
The boiler should be blown down as outlined below.
B. Turn off electrical power supply to boiler. Allow boiler to cool down
and steam pressure to reduce to zero before removing skimmer
tapping plug. Check for steam pressure by testing the pop safety
valve. Keep your hands and all parts of your body away from the
discharge and of the safety valve. Drain boiler down one to two
inches below skimmer tapping. The water might be hot. Remove
skimmer plug slowly and carefully install a 150 psi malleable iron
1-1/2” NPT street elbow, a 1-1/2” NPT skimmer valve and length of
pipe an dplace a bucket underneath the open end of the pipe.
Cover bucked with a piece of cloth. (See figure 6).
C. Fil boiler slowly until water level is two inches from top of gauge
glass. (This is the starting water level for skimming only). Fire boiler
to produce steam. If the system is heavily laden with oil, it may be
difficult to obtain much more than a pound or so of pressure. Set
the pressure control at about 7 psi. The higher the steam pressure
you can use, the better and faster the cleaning.
D. As steam develops, open the SKIMMER drain valve with caution to
skim the oil and film from the top of the water. DO NOT open the
boiler drain valve. Close the skimmer drain valve when the water
level drops to about 5” from the top of the gauge glass. The water
may stop before the level drops to 5” below the top of the glass.
Refill boiler until water level is again two inches from the top of the
gauge glass.
E. Repeat (D) above until all film is skimmed off the water settles to
Boiler A.
Size Dim.
LD-50 15 27⁄32
LD-60 19 7⁄32
LD-70 22 19⁄32
Models LD-50 thru LD-70
Figure 5. Recommended Steam Piping at Boiler
Models LD-30 thru LD-40
LIBERTY
a normal movement. Add make up fresh water to the boiler as
described in (D) above, during the blow-off operation, to maintain
the proper skimming water level in the vessel. Empty bucket fre
quently in order to see the difference in water cleanliness.
F. When surging has stopped and water is clean, and no film can be
seen floating in the bucket, shut off boiler, drain down to level of
skimmer tapping, remove valve, plug skimmer tapping and refill
the boiler to 24-1/2” water lever.
After 15 minute operation, readjust level to normal operating level
of 25-1/2” from bottom of boiler (see figure 6). Check the pop
safety valve for proper operation.
Check for low water cut-off operation. See section on page 7 for
check-out.
G. The entire process may have to be repeated over a period of a
few days on extremely fouled system.
CLEANING PIPING SYSTEM
A. To clean piping system, open all valves at the heating elements.
After getting up a good head of steam, shut the boiler down and
allow the condensate to return to the boiler. The condensate will
carry the oil film with it. Again blow-off the boiler. On extremely
fouled systems, it may require several visits over a few days to
clean the system.
B. When steam only (no water) is released through the hand valve,
the boiler will not surge or flood.
PIPING FOR WATER UNITSS
NOTE: On knock down boiler only, jacket may be installed after supply and return piping connection, but must be installed prior to
adding trim.
5
Figure 8. Air Collecting System
Figure 6.
Figure 7. Air Eliminating System
Figure 9. Recommended Piping to Tankless Heater
I. CIRCULATING SYSTEM
A. FORCED CIRCULATION hot water heating system:
top tapping as supply tapping, and use the front or rear bottom tappings for the return.
B. A FLOW CONTROL VALVE (See figure 7) will prevent gravity
circulation and usually is required when tankless heater is
installed.
II. AIR CONTROL SYSTEMSS
A. DIAPHRAGM - TYPE COMPRESSION TANKS are used to
control system pressure in an AIR ELIMINATING SYSTEM:
an automatic air vent is used to REMOVE air from the system
water. See figure 7.
B. CONVENTIONAL COMPRESSION TANKSS (non-diaphragm
type) are used to control system pressure in an AIR COLLECTING SYSTEM. Within the system, after initial start-up
and venting, air is collected in the tank and acts in contact
with the water to control pressure. Air is not vented from this
system.
If system pressure needs further control, add another tank in
parallel with the original tank or install a large capacity tank.
Locate the tank at the inlet end of the pump near the boiler.
(See figure 8.)
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