Page 1
EUTECTIC EC-20
OIL-FIRED WATER BOILERS/NO. 2 OIL
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
Ratings and Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Installation Requirements:
Boiler Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Chimney Requirements . . . . . . . . . . . . . . . . . . . . . . . . . .3
Air Supply and Venting . . . . . . . . . . . . . . . . . . . . . . . . .3-5
Controls and Accessories . . . . . . . . . . . . . . . . . . . . . . . . .6
Piping for Water Units . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Installing Burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Oil Supply Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Wiring the Boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Vent Piping and Draft Regulator . . . . . . . . . . . . . . . . . . . .7
Operating Instructions:
Precautions Before Starting . . . . . . . . . . . . . . . . . . . . . . .7
Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-12
Cleaning and Filling New Water Boiler . . . . . . . . . . . . . . . .13
Care and Maintenance:
Extended Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Freezing Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Oil Burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
General Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Burner Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-16
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.
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.
IMPORTANT: This boiler must be installed, serviced and
repaired by a trained, experienced, service technician,
licensed for the installation and servicing of oil burning hot
water heating system equipment or otherwise qualified by the
authorities having jurisdiction over the installation.
Printed in U.S.A. 1113 Publication No. EC-20-40 Rev.A
Part No. 470910000
SERVICE COMPANY
Name ______________________________
Address_____________________________
___________________________________
Telephone ___________________________
Model # _____________________________
Serial # _____________________________
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EUTECTIC EC-20
2
Maximum operating pressure 60 psi.
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 D.O.E. capacity output. The net AHRI output ratings shown are based on
an allowance for piping and pickup of 1.15 (water). D.O.E. capacity output is
divided by the allowance to obtain net rating. The Slant/Fin Technical Service
department should be consulted before selecting a boiler for unusual piping
and pickup requirements such as intermittent system operation, extensive
piping, etc.
† Ratings apply to the use of light oil at 140,000 Btu per gallon and apply only
when burner models listed on page 12 of this manual are used, and are
properly adjusted to produce 13% CO2.
# All dimensions subject to normal manufacturing tolerance.
NOTE: All boilers under 300,000 Btuh (87.9 kw) input are tested and rated for
capacity under the U.S. Department of Energy (D.O.E.) Test Procedures for
Boilers.
TABLE 1: Ratings and Dimensions
EC-25 1.55 217,000 190 165 6 x 15 86.5 N/A 32-9/16 35-3/8 46-3/8 6 20 2
EC-26 1.90 266,000 232 202 7 x 15 86.5 N/A 37-9/16 40-3/8 51-3/8 7 25 2
EC-27 2.25 315,000 269 234 7 x 15 N/A 85.3 42-9/16 45-3/8 56-3/8 7 30 2
EC-28 2.50 350,000 298 259 7 x 15 N/A 85.3 47-9/16 50-3/8 61-3/8 7 35 2
BOILER
MODEL
NO.
GPH BTUH
AHRI
BURNER
CAPACITY
OIL INPUT † §
D.O.E.
HEATING
CAPACITY
MBH *
WATER
APPROX.
OVERALL
LENGTH
“A”
THERMAL
EFF. (%)
AHRI
WATER
NET
RATING
MBH *
AHRI
CHIMNEY SIZE
DIMENSIONS (inches) #
I.D. ROUND
X HEIGHT
(in x ft)
AFUE
%
BOILER
LENGTH
“B”
BOILER
LENGTH
“C”
FLUE
DIA.
“D”
DISTANCE
BETWEEN
LEGS
“E”
FLUE
OUTLET
LENGTH
“F”
Figure 1: Dimensions
1-1/2”
NPT
Supply
Automatic
Air Vent
Air Eliminator
as per Manufacturer
Specifications
To Circ. (s)
and Zones
Suppy Pipe Mounted
Tridicator
A
D
1-1/2”
NPT
Return
3/4”
NPT
Drain
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EUTECTIC EC-20
3
THE INSTALLATION INSTRUCTIONS IN THIS MANUAL ARE
ABBREVIATED. SEE THE FRONT COVER OF THIS MANUAL
FOR REFERENCES TO CODES AND STANDARDS. SEE
ASSEMBLY INSTRUCTIONS (Part No. 47091100)
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:
* Includes burner, circulator and controls
B. The EC-20 Boiler has full wet base sections which sur-
round fire-box for maximum heat absorption 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" clear-
ance 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 NFPA 31, latest edition.
CHIMNEY REQUIREMENTS (see NFPA 211, latest edition)
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 repairs 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 sections of metal stacks.
5. Seal bad masonry joints.
6. Repair damaged lining.
C. Breeching area must not be reduced at connection into
chimney. Breeching must be inserted into, but not beyond,
inside of chimney liner.
D. 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.
E. The use of a vent cap, where permitted by code, gives
additional protection against adverse wind conditions and
precipitation.
F. Flue Connection: Connect flue pipe between back 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. Draft regulator is not required but
may be installed if conditions warrant it. Install draft regulator in flue pipe, as shown in figure 2.
AIR SUPPLY AND VENTILATION (see NFPA 31, latest edition)
Sufficient air for combustion and ventilation in the boiler room
must be provided. Failure to do this will result in poor combustion, heavy sooting 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
CHIMNEY
BOILERBOILER
PITCH UP
1/4" PER LINEAR FOOT
DO NOT INSTALL DRAFT REGULATOR HERE
BAROMETRIC DRAFT CONTROL
INSTALLED ON VERTICAL RISE
18"
MINIMUM
9"
PITCH UP
1/4" PER
LINEAR FOOT
BAROMETRIC DRAFT CONTROL
INSTALLED ON HORIZONTAL
CONNECTOR
DRILL 1/4" HOLE TO MEASURE
DRAFT,SMOKE,CO % AND STACK
TEMPERATURE
DO NOT INSTALL DRAFT REGULATOR HERE
9"
18"
MINIMUM
2
DRILL 1/4" HOLE TO MEASURE
DRAFT,SMOKE,CO % AND STACK
TEMPERATURE
2
CHIMNEY
Boiler Approximate Total Weight of Boiler
Size Assembly*, filled with water
EC-25 701
EC-26 815
EC-27 906
EC-28 1,008
Figure 2.
Barometric Draft
Regulator
Location
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EUTECTIC EC-20
4
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, weather stripped, energy-saving buildings or older
buildings which have been modified similarly, 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, other solid
fuel burning appliances and exhaust fans consume great
quantities of air; if air supply is not ample, such an appliance
will create a downdraft in the oil-fired boiler flue. This can create a hazardous condition. Flue gases can be sucked out of
the chimney through the vent regulator into the living space.
DO NOT operate this boiler and a solid fuel burning appliance
at the same time, unless the solid fuel burner is provided with
its own outside air supply.
See Table 2, “Provisions for Combustion and Ventilation Air
Supply” for determining need and method of providing air for
combustion and ventilation.
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.
TABLE 2: Provisions for Combustion and Ventilation Air Supply. See NFPA 31, latest edition for more detailed information.
Boiler Location Air Supply
2.1 Unconfined space Is there sufficient air for combustion by natural infiltration (see
NOTE (1), “Test...” below)?
2.2 Unconfined space If there is NOT sufficient air for
combustion by natural infiltration
due to tight construction or other
conditions, then it REQUIRES AIR
FROM OUTDOORS. SEE
“ACTION REQUIRED” column at
right. See Notes (1) and (2) below.
2.3 Confined space If there is sufficient air for combustion from within building but it
comes from outside of the
confined space, see “ACTION
REQUIRED” column at right.
See Note (1) below.
2.4 Confined space If there is NOT sufficient air for
combustion due to tight construction or other conditions it
REQUIRES AIR FROM OUTDOORS. SEE “ACTION
REQUIRED” column at right.
See NOTE (2) below.
Action Required
NONE
Provide air from outdoors directly through a permanent outside wall opening or openings with a free open area of not
less than 1 sq. in. per 4000 Btu/hr of TOTAL input of ALL fuel
burning appliances in the building. See Note (1) and (3).
The confined space shall be provided with two permanent air
openings, one near the top of the enclosure and one near the
bottom. EACH opening shall have a free air opening of not
less than 1 sq. in. per 1000 Btu/hr. of TOTAL input of ALL fuel
burning appliances within the enclosure. The two openings
shall freely communicate with the interior areas of the building
which in turn would have to have adequate infiltration of air
from outdoors. See Notes (1, 3) and Figure 3a.
(a) Air from the outdoors shall be provided to the confined
space by two permanent openings, one in or near the top
of the enclosure space and one in or near the bottom. The
openings shall communicate directly, or by means of
ducts, with outdoors or to such spaces (crawl or attic) that
freely communicate with outdoors (See figures 3b, 3c
and 3d).
(b) Where directly communicating with outdoors or by means
of vertical ducts, each opening shall have a free area of
not less than 1 sq. in. per 4,000 Btu/hr. (35 sq. in. per gal.
per hr.) of total input rating of all appliances in the enclosure. If horizontal ducts are used, each opening shall have
a free area of not less than 1 sq. in. per 2,000 Btu/hr. (70
sq. in. per gal. per hr.) of total input of all appliances in the
confined space. See Figures 3b, 3c and 3d.
(1) Test for sufficient air for combustion by infiltration by running this boiler for 30 minutes under all of the following conditions and at the same time: a) all doors, win-
dows and other like openings must be closed, b) all fuel burning appliances should be FIRING, c) all exhaust fans and clothes dryers turned ON. At the above
conditions the CO2, smoke and draft readings must be normal. (CO2between 11% and 13%, smoke between ZERO and a TRACE, draft between .02” W.C. and
.04” W.C. negative pressure.)
(2) Aside from tight construction, some of the conditions that steal air for combustion from a boiler are other fuel burning appliances, exhaust fans and clothes dryers.
(3) Generally, louvers made of wood have a free open area of 20% and those made of metal have a 60% to 70% free open area. Screens also reduce the open area
of the louvers. Fly screen can reduce air opening by 50%.
* Draft is negative or suction pressure
Page 5
EUTECTIC EC-20
5
6 IN.
MAX.
12 IN
MAX
CHIMNEY
6 IN.
MAX.
12 IN
MAX
CHIMNEY
CHIMNEY
CHIMNEY
Figure 3a.
Appliances located in confined spaces. Air from
inside the building. See Table 2 (2.3).
Figure 3b.
Appliances located in confined spaces. Air from outdoors. See Table 2 (2.4).
Figure 3c.
Appliances located in confined spaces. Air from outdoors through ventilated attic. See Table 2 (2.4).
Figure 3d.
Appliances located in confined spaces. All air from
outdoors through ventilated crawl space and outlet
air to ventilated attic. See Table 2 (2.4).
Page 6
EUTECTIC EC-20
6
The opening size recommendation just given is for guidance
only. It is the installer’s responsibility to provide air for combustion and ventilation to all appliances, under all operating conditions, for each installation. See NFPA 31, latest edition for
more specific details.
INSTALLING CONTROLS AND ACCESSORIES
ON BOILER UNITS
Notes:Jacket must be installed on boiler units prior to
installation of trim.
WATER BOILER TRIM, see page 2, figures 1 for tapping
locations.
WATER PIPING FOR HOT WATER HEATING BOILERS
NOTE: On knocked-down boiler only, jacket may be installed
after return piping connection, but must be installed prior to
adding trim, supply piping and drain valve.
I. CIRCULATING SYSTEM
A. FORCED CIRCULATION hot water heating system: Use
the top tapping as supply tapping, and use the rear bottom tapping for the return.
B. A FLOW CONTROL VALVE will prevent gravity circula-
tion and is required when an external tankless heater,
an indirect water heater or multiple circulators are
installed.
II. AIR CONTROL SYSTEMS
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 4)
If system pressure needs further control, add an additional tank or install a larger capacity tank.
The automatic air vent should be installed in the top of
the boiler, as in figure 4 and at radiation high points.
B. CONVENTIONAL COMPRESSION TANKS (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 except at radiation high points.
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.
C. HOT WATER RADIATION VENTING - Manual air vents
should be installed at the top of all "drops" (where piping goes downward). Air must be vented or purged from
all zone lines to permit proper system heating.
D. PUMP LOCATION - Locating low-head pump(s) on
return to boiler is only acceptable in residences of one
or two stories. The pump location shown in figure 4 is
required in large, multi-story building installations, especially when high-head pumps are used and is also rec-
ommended for all applications.
IMPORTANT: Hot water heating systems containing high water
volume, such as would occur with cast iron radiation, require
special care with air elimination.
The circulator pump should be located on the boiler supply pipe
and the expansion tank and air scoop should be located near
the pump suction. For alternate circulator pump location on
return for low-head pumps and one or two story buildings ONLY.
Figure 4. Air Eliminating System or Air Collecting System
Air Eliminator
as per Manufacturer
Specifications
To Circ. (s)
and Zones
Tridicator
1-1/2”
NPT
Supply
Automatic
Air Vent
Suppy Pipe Mounted
1-1/2”
NPT
Return
3/4”
NPT
Drain
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EUTECTIC EC-20
7
DOMESTIC HOT WATER
For Indirect-fired storage water heater application, see
Slant/Fin publication WH-10, Sizing Guide WH-SG and
Installation manual WH-40. The installation manual includes
several control systems and relay centers for space and
domestic water heating in addition to plumbing.
INSTALLING THE BURNER
See Burner Data, page 12, and Burner Manual supplied with
burner. If burner is not mounted as received, mount to boiler,
placing flange over mounting studs. Use gasket between
flange and boiler. Distance between flange and nose of burner
must be as shown on page 12. Check to see that nozzle and
settings are as given in burner data tables, page 12.
OIL SUPPLY PIPING
Install the oil tank or tanks and piping from tank to burner.
Follow local codes and practices, INSTALLATION OF OIL
BURNING EQUIPMENT, NFPA 31, latest edition, and the
instruction sheet attached to the oil burner pump. A one-pipe
system should be used for gravity-fed fuel systems and for lift
systems, where the total lift is less than 8 feet. Where the total
lift is greater than 8 feet, a two-pipe system must be used. In
some instances, local codes may require a two-pipe system
for below grade fuel oil tanks. Be sure to set up the fuel oil
pump for the piping system used; follow the instructions
attached to the pump. Be sure to include a good quality, low
pressure drop fuel oil filter in the supply line from the tank.
This is necessary, especially at low fuel oil flow rates (small
nozzle sizes), to prevent nozzle plugging. Fuel oil shutoff
valves should be installed at the burner on the supply (and
return if two-pipe) to facilitate servicing. See Slant/Fin publication on one-pipe and two-pipe fuel oil systems.
WIRING THE BOILER
(see National Electric Code ANSI/NFPA 70-latest edition)
A. The wiring diagrams for the burner and boiler may be found
on pages 10 and 11.
B. 24 volt control wiring should be approved Safety Circuit
wire, protected as needed.
C. Power supply wiring to the burner must be 14 gauge, as
required, and should have a properly fused disconnect switch.
120 volt wiring to pumps and safety controls must also be 14
gauge. Wire must be enclosed in approved conduit.
D. The wires supplying power to the burner MUST go through
the quick disconnect plugs provided with the boiler.
E. All wiring must be installed in compliance with the National
Electric Code, or any local or insurance codes having jurisdiction.
VENT PIPING AND DRAFT REGULATOR
(see NFPA 31, latest edition)
A. Vent connectors must be the same diameter as the boiler
flue collar. (See page 2)
B. Vent pipes and breeching must be pitched upward a mini-
mum of 1/4" per foot.
C. Connect vent pipe to the chimney using as few elbows as
possible and as short as possible within NFPA 31 or
authority.
D. Horizontal vent connector into the chimney should not be
inserted beyond the inside wall of the chimney.
E. Install barometric draft regulator on horizontal breeching,
near chimney, with hinge horizontal and face vertical conditions permitting as in Figure 3a. See Figure 3b as a second
choice. See manufacturer's instructions packed in carton
with barometric draft regulator.
F. If two or more appliances are used on the same chimney,
see CHIMNEY, page 3.
G. Make up all joints with minimum air leaks, secure with
sheet metal screws.
PRECAUTIONS BEFORE STARTING OIL BURNER
Make a positive check of A through F before starting burner:
A. Boiler and system are full of water. All air is vented from
system. See below.
B. All wiring is completed. See pages 10 and 11.
C. Oil supply is connected to the burner; nozzle is installed
correctly; oil valve is open at tank.
D. Main cast iron door on which burner is mounted is bolted
shut and fiberglass rope seal is making good contact.
E. Smokepipe is connected to chimney.
F. All combustible materials are cleared away.
G. Combustion air supply is provided. See page 3.
H. Burner settings are adjusted as per page 12 as shown on
boiler jacket.
START-UP (COMBUSTION TEST INSTRUMENTS MUST
BE USED) THIS BOILER IS A POSITIVE PRESSURE BOILER.
A. Make sure the boiler is installed and wired properly and is full
of water.
B. The observation port cover is mounted on the hinged burner
mounting door (see figure 2 on page 2). NEVER touch the
port cover or any surrounding surfaces with hands. It may be
HOT. See the burner instructions for bleeding air, etc. Step
away from the boiler and start the oil burner.
C. IMMEDIATELY, set burner air bands to obtain a bright fire
without smoke or oil stain. Set the DRAFT REGULATOR to
obtain .02" – .04" draft at the breeching.
D. Allow the burner to fire for at least one hour total firing time,
to bake out the volatile binders in the combustion chamber
before taking final combustion readings.
E. By alternate adjustment of the barometric draft regulator, the
burner air regulation and head regulation devices (whichever
apply), set for a zero to a trace of smoke and 12% CO
2
.
Then open the air bands or shutter (whichever apply) an
additional 1/8". This should result in zero smoke with NO raw
oil on the smoke paper and a smooth light-off. DO NOT
ATTEMPT TO SET FIRE BY EYE. Flame retention burners
may appear efficient and smoke free from an inefficient 7%
up to an overly high 14% CO2. However, a very low CO2can
also result in poor ignition and raw (unburned) oil entering the
fire box. At very high CO
2
, any slight decrease in air flow for
any reason will cause incomplete combustion, with high
smoke and dry soot formation in the fire box.
F. Once burner and draft have been set up, then smoke, CO
2
and stack temperature should be checked and recorded. If
smoke is greater than trace, review the burner instructions
and replace the nozzle if necessary. Normal smoke to be
expected is zero to a trace.
G. Probe slot can be accessed by removing 1/4" plug (Next to
observation port on door) with an adjustable wrench.
Replace plug and tighten to prevent leaks when finished.
Page 8
EUTECTIC EC-20
8
Page 9
EUTECTIC EC-20
9
Page 10
EUTECTIC EC-20
10
Honeywell L7248L,
Beckett 7600A and
Hydrostat 3250 Controls
See “Adjusting Settings”
& “error Codes” for
L7248L on page 12
Page 11
EUTECTIC EC-20
11
Aquastat Control Multiple Zoned (Circulator or Zone Valve)
FOR SLANT/FIN THERMATIC CONTROL WIRING,
SEE “THERMATIC CONTROL PANEL” MANUAL,
PART NO. 470902000.
Page 12
EUTECTIC EC-20
12
ADJUSTING SETTINGS
To discourage unauthorized changing of Aquastat settings, a procedure
to enter the ADJUSTMENT mode is required. To enter the ADJUSTMENT mode, press the UP, DOWN, and I buttons simultaneously for
three seconds. Press the I button until the feature requiring adjustment
is displayed:
. HL_ . High Limit.
. LL_ . Low Limit. (L7224 only)
. Ldf . Low Limit Differential. (L7224 only)
. °F . °C.
.ELL_ External Low Limit (L7248L only)
Then press the UP and/or DOWN buttons to move the set point to the
desired value, to change between ˚F and C˚, or to enable (On) or disable (Off) the External Low Limit. After 60 seconds without any button
inputs, the control will automatically return to the RUN mode.
DISPLAY
In the RUN mode, the Aquastat will flash .bt. (boiler temp) followed by
the temperature (i.e., 220), followed by °F or °C.
To read boiler settings, press the I key to read the parameter of interest.
For example, press I High Limit
(HL) is displayed, followed by a three-digit number, i.e., 220, followed by
°F or °C. Pressing the I button again (on L7224 models) will display the
Low Limit (LL) followed by a three-digit number and the corresponding
degree designator.
After approximately 60 seconds without any key presses, the display will
enter a dim display mode. To return to the bright display mode, simply
press any key.
DESCRIPTION
Boiler Temperature –
High Limit –
Low Limit –
Low Limit Differential –
Local Thermostat Status –
Enviracom Thermostat Status –
Error Code –
Degrees Fahrenheit –
Degrees Celsius –
FOR L7248L
Aquastat
;tluaf MOCE2rrE
Err3 Excessive electrical noise or frequency out of range. Hardware fault; replace controller. 18, 58
a
Err6
b
Err 8
a
Err9
a
Err 10
a
Err 11
a
Warnings are generated to enunciate the system is not operating optimally, but the Aquastat is still operating and
maintaining boiler temperature. In the instance where an Outdoor Reset Module is used, the warnings may indicate a
reset curve setting error one or more fe atures is not running optimally, and the Aquastat is reverting to default settings
or has stopped running the Outdoor Reset algorithms. The warnings are cleared when the issue(s) is resolved.
b
To clear Err 8 condition, depress and hold all three user keys simultaneously for 60 seconds. Err 8 condition clears
and display returns to normal. Err 8 condition is designed to catch welded relays on the Aquastat and will normally
only occur near end of life for the control. If Err 8 condition has occurred early in the controls life, be sure to check for
voltage feedback to B1 when B1 should be o and check current draw on b terminal to be sure oil burner is not drawing excessive current. Err 8 condition will keep repeating if B1 fault is not cleared.
:gninraW7rrE
Repeated B1 fault (voltage present at B1 wh en output is turned o); check B1 wiring/voltage. 25
Warning: Outdoor Reset System failure; communication to Outdoor Reset Module lost,
Outdoor Reset Module failure, multiple outdoor tempera ture sensors detected on the bus, or
outdoor temperature sensor failure. Check EnviraCOM wiring (1, 2, 3), check sensor wiring.
Warning: Boost Failure; Boost Mode active at least once per cycle for the last 60
consecutive cycles. Check Outdoor Reset curve settings.
DHW Module/Sensor failure; communication to DHW Module lost, DHW Module failure, or
temperature sensor failure. Check EnviraCOM wiring (1, 2, 3), check sensor wiring.
noitcA/esuaCedoC rorrE
EnviraCOM
Alarm
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81.gniriw ™MOCarivnE kcehc
46.egatlov/gniriw 1B kcehc ;tluaf 1B4rrE
95.caV 011 ,2L-1L kcehc ;eniL woL5rrE
29.esuf ecalper ,seriw MOCE kcehc ;esuF :gninraW
A/N.seulav tluafed ot teser ;fdL ,fdH ,LL ,LH ,MORPEE
50, 53, 149
150
146, 147,
148
Page 13
EUTECTIC EC-20
13
CLEANING AND FILLING A NEW WATER BOILER
I. There are a number of commercial preparations available
from your distributor for cleaning and for corrosion protection
conditioning the internal (waterside) surfaces of boilers.
Follow the preparation manufacturer’s instructions.
DANGER:
Use CAUTION when handling chemicals and
draining hot water from a boiler. Scalding water and/or
chemicals can cause permanent injury to the skin, eyes
and respiratory system.
II. Filling and venting the water boiler after cleaning
A. Refill the system with fresh water.
B. Bring water temperature to at least 180° F promptly.
C. Circulate water through entire system.
D. Vent the system, including the radiation.
E. The boiler is now ready to be put into service or on
standby.
F. If brand name air-control devices are used, venting
instructions furnished with the devices should
be followed.
III. Safety check for control system
High limit control test: Set thermostat high enough for boiler
water temperature to reach high limit control setting. When
this temperature is reached, the high limit switch should
open, and the burner should shut off automatically. If the
high limit does not operate to shut off the burner, the high
limit or the wiring is faulty. Repair or replace immediately.
CARE AND MAINTENANCE
I. EXTENDED SHUTDOWN, CLEANING OR REMOVAL OF
BOILER FROM SERVICE.
DANGER:
Use CAUTION when handling chemicals and
draining hot water from a boiler. Scalding water and/or
chemicals can cause permanent injury to the skin, eyes
and respiratory system.
A.Shut down burner by disconnecting all electrical power to
the burner by turning OFF the BURNER EMERGENCY
SWITCH of this boiler. After shutting down burner, while
the boiler is still hot (180°F to 200°F), drain water from
the bottom of the boiler until it runs clear.
EC-25 EC-26 EC-27 EC-28
11.5 13 15 17
WATER CONTENT OF BOILER (GALLONS)
3/8 — — — 0.430 0.0075
1/2 40 0.622 0.0157 0.545 0.0121
5/8 — — — 0.666 0.0181
3/4 40 0.824 0.0277 0.785 0.0251
1 40 1.049 0.0449 1.025 0.0429
1 1/4 40 1.380 0.0779 1.265 0.0653
1 1/2 40 1.610 0.106 1.505 0.0924
2 40 2.067 0.174 1.985 0.161
2 1/2 40 2.469 0.249 2.465 0.248
3 40 3.068 0.384 2.945 0.354
Nominal
Pipe
Size
Inches
Schedule
No.
Inside
Diameter
Inches
Gallons
per
Lin. Ft.
Inside
Dia.
Inches
Gallons
per
Lin. ft..
Standard Steel Pipe Type L Copper Tube
VOLUME OF WATER IN STANDARD PIPE OR TUBE
B.Provide corrosion protection conditioning to the boiler water
in the heating system. There are a number of commercial
heating system preparations available from your distributor.
Follow the preparation manufacturer’s instructions.
C.To clean the fireside boiler surfaces, first shut down
burner by disconnecting all electrical power to the burner
by turning OFF the OIL BURNER EMERGENCY
SWITCH of this boiler in order to perform the following
work in (1) through (10) below.
1. Remove the flue pipe from the boiler flue collar and
clean thoroughly.
2. Inspect the entire vent connector back to the chimney and clean if necessary.
3. Inspect the chimney for soot, debris and other unsafe
conditions of the chimney and take the necessary
action.
4. The burner mounting door must be fully open to
clean the flue passages and the combustion
chamber. If the oil line is not flexible enough it should
be disconnected from the burner during the cleaning
process. The flexible electric conduit connected from
the junction box on the boiler to the burner via a
plastic connector must be disconnected from the
burner by grasping the plastic half of the connector
closest to the flexible conduit and gently pulling it in
the direction of the conduit until it is disconnected.
Remove both 16 mm (5/8") special nuts on the sides
of the swinging door. You will need a 16 mm (5/8") open
end or box wrench. Open the door to completely
expose the combustion chamber for thorough
cleaning and for inspection of main cast iron burner
door insulation and burner door fiberglass sealing
rope. If combustion chamber parts above are badly
deteriorated then replace with original factory parts
available at your distributor.
5. Use the flue brush to clean the flueways. Remove cast
iron baffle plates for cleaning See figure 5 for removal
and replacement of baffle plates. A wire brush (supplied with boiler) may be used to remove any carbon
accumulation that may have developed in the combustion chamber. Vacuum the loose soot and debris from
the boiler. Replace baffle plates.
6. Inspect the burner combustion head. Clean if necessary and make sure all the adjustments are correct.
(See burner data pages for the burner installed.)
Replace oil nozzle with new one and readjust electrodes. To insure proper burner operation ONLY THE
NOZZLES SPECIFIED IN THIS MANUAL OR ON
THE BURNER LABEL SHOULD BE USED FOR
REPLACEMENT.
Page 14
EUTECTIC EC-20
14
7. Protect all of the fireside surfaces by swabbing with
neutral mineral oil.
8. Close main cast iron burner door (door on which
burner is mounted). Make sure that the entire seal
is making good contact with the boiler casting when
replacing both 16 mm (5/8") special nuts and
tightening.
D.If boiler room is damp, provide ventilation.
II. PROVIDING PROTECTION FOR FREEZING
Anti-freeze is sometimes used in hydronic heating systems to protect against freeze-up in the event of power
failure, or safety control shutdown when the building is
unoccupied. It should be recognized that unless the
building is kept above freezing temperature by some
means, the plumbing system is not protected.
PROPYLENE GLYCOL is used in the quick-freeze food
industry; it is practically non-toxic. Its use may be permitted when indirect water heaters are used. When antifreeze must be used, inhibited propylene glycol is recommended. Useful information on the characteristics, mixing
proportions, etc. of glycol in heating systems is given in
Technical Topics No. 2A, available from the Slant/Fin
website, go to http://slantfin.com. Go to library, select
current literature, select boiler model. See related topics
and select antifreeze and hydronic systems. Consult
glycol manufacturers for sources of propylene glycol.
DO NOT USE ETHYLENE GLYCOL BECAUSE IT IS TOXIC.
III. OIL BURNER
Inspect and clean annually and following any period of
improper operation. Recheck and adjust settings as specified for burner model and nozzle size.
Set burner air and draft regulator, using test instruments
to obtain recommended CO
2
and draft without smoke.
See the Burner Data page in this manual that corresponds to the burner installed.
IV. GENERAL MAINTENANCE
These operations are recommended to be performed at
regular intervals:
A.BOILER HEATING SURFACES: clean off all coatings
found. Reseal covers.
B.BOILER CONTROLS: check contacts, settings, correct
functioning.
C.PIPING: check piping and accessories for leaks.
D.CHIMNEY or STUB VENT and BREECHING: check for
obstructions and leaks.
E.COMBUSTION AIR TO BURNER: check for continued
POSITIVE supply of air as required. Air needs are
greatest in coldest weather. Refer to AIR SUPPLY,
page 3.
F. WATER SYSTEM: check
1. System to be full of water and pressure to remain
stable (between 12 psi and 25 psi).
2. Air-control system: noise and air binding in radiation
should not occur.
3. Water lines: slightest leaks should be corrected.
G.BOILER ROOM AIR SUPPLY: air vents should be open
and free of obstruction. See page 3.
Put the baffles in place. Align the convection accelerators with the first fins.
BCDE
EC-25
XX
EC-26
XXXX
EC-27
XXXX
EC-28
XXXX
Figure 5. Baffle plates.
Page 15
EUTECTIC EC-20
15
BURNER DATA - FOR RIELLO BURNERS SHIPPED WITH BOILERS ONLY
† Air shutter and head settings shown are approximate ONLY. See START-UP page 7. Seal joint between flange and air tube with a suitable high
temperature sealant, if joint was not sealed at factory.
It is suggested that due to the positive pressure observed in the chamber that the air tube hole and any other passages of the flue gas leakages
be sealed to avoid combustion gas fumes from leaking into the boiler room.
5/ 32” or 4 mm
13/ 64” or 5 mm
13/ 64”
5 mm
D6003
Figure 6. Riello 40 Series. Model F-10 Electrode Setting
TURBULATOR SETTING
A) Loosen NUT (1), then turn SCREW (2) until the INDEX
MARKER (3) is aligned with the correct index number as per the
Burner Set-up chart, on page 12.
B) Retighten the RETAINING NUT (1).
NOTE: Zero and five are scale indicators only. From left to right,
the first line is 5 and the last line 0.
SETTING THE AIR ADJUSTMENT PLATE
A) Regulation of the combustion air flow is made by
adjustment of the manual AIR ADJUSTMENT PLATE
(1) after loosening the FIXING SCREWS (2 & 3).
The initial setting of the air adjustment plate should be
made according to Column 5 in the Burner Set-up Chart.
B) The proper number on the manual AIR ADJUSTMENT
PLATE (1) should line up with the SETTING INDICATOR
(4) on the fan housing cover. Once set, the air adjustment
plate should be secured in place by tightening SCREWS
2 and 3.
C) The final position of the air adjustment plate will vary on
each installation. Use instruments to establish the proper
settings for maximum CO2 and a smoke reading of zero.
NOTE: Variations in flue gas, smoke, CO2 and temperature
readings may be experienced when the burner cover is put
in place. Therefore, the burner cover must be in place when
making the final combustion instrument readings, to ensure
proper test results.
3
2
1
D5997
Figure 7. Riello 40 Series. Model F-10 Turbulator Setting
D5231
2
1
34
Figure 8. Riello 40 Series. Model F-10
Setting the Air Adjustment Plate
Boiler
Model
Burner
Model
Blast
Tube
Firing
Rate
GPH
Nozzles
Oil Pump
(PSIG)
Approx.
Head
Setting †
Approx.
Air
Setting †
Burner
Insertion
Depth
Size
GPH
Angle &
Ty pe
MFR.
EC-25 F-10 Long 1.55 1.25 60˚ B Hago 158 1.5 2.8 7"
EC-26 F-10 Long 1.9 1.5 45˚ B Hago 160 2.0 4.0 7"
EC-27 F-10 Long 2.25 1.75 45˚ B Hago 165 4.0 4.5 9.5"
EC-28 F-10 Long 2.5 2.0 45˚ B Delavan 155 5.0 4.5 9.5"
Page 16
SLANT/FIN CORPORATION, Greenvale, N.Y. 11548 • Phone: (516) 484-2600
FAX: (516) 484-5921 • Canada: Slant/Fin LTD / LTE E , Mississauga, Ontario
www.slantfin.com
©Slant/Fin Corp. 2011.
EC-25 P2-KA Short 1.55 1.25 60˚ B Delavan 155 8 4.5
EC-26 P2-KA Short 1.9 1.5 60˚ B Hago 160 9 8
EC-27 P2-KA Short 2.25 1.75 60˚ B Hago 165 15 11
EC-28 P2-K Short 2.5 2 60˚ B Delavan 155 8 10
Boiler
Model
Burner
Model
Blast
Tube
Firing
Rate
GPH
Size
(GPH)
Angle &
Type Mfg.
Oil Pump
(PSIG)
Approx.
Head
Setting
Approx.
Air
Setting
Nozzles
FIRING HEAD ADJUSTMENT
By turning the head adjustment screw clockwise, the
burner head will move inside the blast tube AWAY from
the end cone. This achieves lower firing rates. Similarly,
by turning the head adjustment screw counter-clock-
wise, the burner head will move inside the blast tube
toward the end cone, increasing the firing rate.
AIR SHUTTER ADJUSTMENT
Air adjustment is set at the factory. By turning the air
adjustment screw clockwise, the air shutter opening
increases. To achieve proper combustion, the air shutter
may need to be adjusted.
Head adjustment
Air band
adjustment
Scale
Scale
Picture 10
Figure 9
Figure 11
Figure 12
HEAT WISE BURNER DATA – BURNERS MODEL P2-KA and P2-K
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