New Yorker New Yorker CL Series Service manual

110772-01 - 5/20
9700609
Installation, Operating and Service Instructions for
CL
TO THE INSTALLER:
Affix these instructions adjacent to boiler.
TO THE CONSUMER:
Retain these instructions for future reference.
For service or repairs to boiler, call your heating contractor. When seeking information on boiler, provide
Boiler Model Number and Serial Number as shown on Rating Label.
• Steam Boiler
•Natural Draft
•Oil-Fired
Models:
•CL3-105SE
•CL3-140SE
• CL4-168SE
• CL4-210SE
• CL5-245SE
• CL5-266SE
•CL3-105SET
•CL3-140SET
• CL4-168SET
• CL4-210SET
• CL5-245SET
• CL5-266SET
Manual Contents Page
1. Product Description, Specification & ....
Dimensional Data ....................5
2. Pre-Installation ......................9
3. Steam Boiler Piping & Trim ...........11
4. Tankless & Indirect Water Heater Piping. 13
5. Venting ............................16
6. Electrical ..........................17
7. Oil Piping ..........................20
8. System Start-up.....................22
9. Operating ..........................25
10. Maintenance & Service Instructions ....27
11. Boiler Cleaning .....................30
12. Troubleshooting ....................32
13. Service Parts .......................34
14. Burner Specifications ................40
Appendix ..........................41
TM
Steam

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The following terms are used throughout this manual to bring attention to the
presence of hazards of various risk levels, or to important information concerning
product life.
All boilers must be installed in accordance with National, State and Local Plumbing,All boilers must be installed in accordance with National, State and Local Plumbing,
Heating and Electrical Codes and the regulations of the serving utilities. TheseHeating and Electrical Codes and the regulations of the serving utilities. These
Codes and Regulations may differ from this instruction manual. Authorities havingCodes and Regulations may differ from this instruction manual. Authorities having
jurisdiction should be consulted before installations are made.jurisdiction should be consulted before installations are made.
In all cases, reference should be made to the following Standards:In all cases, reference should be made to the following Standards:
USA BOILERSUSA BOILERS
A. Current Edition of American National Standard ANSI/NFPA 31, “Installation of OilA. Current Edition of American National Standard ANSI/NFPA 31, “Installation of Oil
Burning Equipment”, for recommended installation practices.Burning Equipment”, for recommended installation practices.
B. Current Edition of American National Standard ANSI/NFPA 211, “Chimneys, FireB. Current Edition of American National Standard ANSI/NFPA 211, “Chimneys, Fire
places, Vents, and Solid Fuel Burning Appliances”, For Venting requirements.places, Vents, and Solid Fuel Burning Appliances”, For Venting requirements.
C. Current Edition of American Society of Mechanical Engineers ASME CSD-1,C. Current Edition of American Society of Mechanical Engineers ASME CSD-1,
“Controls and Safety Devices for Automatically Fired Boilers”, for assembly and“Controls and Safety Devices for Automatically Fired Boilers”, for assembly and
operations of controls and safety devices.operations of controls and safety devices.
D. All wiring on boilers installed in the USA shall be made in accordance with theD. All wiring on boilers installed in the USA shall be made in accordance with the
National Electrical Code and/or Local Regulations.National Electrical Code and/or Local Regulations.
NOTICE: This boiler has a limited warranty, a copy of which is included with this boiler. The warranty for this boiler
is valid only if the boiler has been installed, maintained and operated in accordance with these instructions.
Surface rust on cast iron sections may be attributed to the manufacturing process as well as condensation
during storage. Surface rust is normal and does not affect the performance or longevity of a boiler.
IMPORTANT INFORMATION - READ CAREFULLY
NOTICE: Indicates special instructions on
installation, operation, or service which are
important but not related to personal injury
hazards.
DANGER
Indicates a hazardous situation that, if not
avoided, will result in death or serious injury.
CAUTION
Indicates a hazardous situation that, if not
avoided, could result in minor or moderate
injury.
WARNING
Indicates a hazardous situation that, if not
avoided, could result in death or serious injury.
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WARNING
• Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal
injury or loss of life. Failure to follow all instructions in the proper order can cause personal injury or death.
Read and understand all instructions, including all those contained in component manufacturers manuals
which are provided with the boiler before installing, starting-up, operating, maintaining or servicing this boiler.
Keep this manual and literature in legible condition and posted near boiler for reference by owner and service
technician.
• This boiler requires regular maintenance and service to operate safely. Follow the instructions contained in
this manual.
• Installation, maintenance, and service must be performed only by an experienced, skilled and
knowledgeable installer or service agency.
• All heating systems should be designed by competent contractors and only persons knowledgeable in the
layout and installation of hydronic heating systems should attempt installation of any boiler.
• Installation is not complete unless a pressure relief valve is installed into the tapping located on top left
corner of front section- See Piping and Trim Sections of this manual for details.
• It is the responsibility of the installing contractor to see that all controls are correctly installed and are
operating properly when installation is complete including verifying that the limit sensor is fully installed
(seated in bottom of Well).
Failure to properly install Limit Sensor may result in property damage, personal injury or loss of life due to
elevated operating temperatures and/or pressures.
• This boiler is suitable for installation on combustible flooring. Do not install boiler on carpeting.
• Do not tamper with or alter the boiler or controls.
• Inspect flueways at least once a year - preferably at the start of the heating season. The inside of
the combustion chamber, the vent system and boiler flueways should be cleaned if soot or scale has
accumulated.
• When cleaning this boiler, DO NOT damage combustion chamber liner and/or rear target wall. If damaged,
combustion chamber insulation must be replaced immediately.
• Oil Burner and Controls must be checked at least once a year or as may be necessitated.
• Do not operate boiler with jumpered or absent controls or safety devices.
• Do not operate boiler if any control, switch, component, or device has been subject to water.
• Boiler materials of construction, products of combustion and the fuel contain alumina, silica, heavy metals,
carbon monoxide, nitrogen oxides, aldehydes and/or other toxic or harmful substances which can cause
death or serious injury and which are known to the state of California to cause cancer, birth defects and other
reproductive harm. Always use proper safety clothing, respirators and equipment when servicing or working
nearby the boiler.
!
DANGER
DO NOT store or use gasoline or other flammable vapors or liquids in the vicinity of this or any other appliance.
!

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WARNING
• This boiler contains very hot water under high pressure. Do not unscrew any pipe fittings nor attempt to
disconnect any components of this boiler without positively assuring the water is cool and has no pressure.
Always wear protective clothing and equipment when installing, starting up or servicing this boiler to prevent
scald injuries. Do not rely on the pressure and temperature gauges to determine the temperature and
pressure of the boiler. This boiler contains components which become very hot when the boiler is operating.
Do not touch any components unless they are cool.
• High water temperatures increase the risk of scalding injury. If this boiler is equipped with a tankless heater
for domestic water supply, a flow regulator and automatic mixing valve must be installed properly in tankless
heater piping. See Piping and Trim Sections of this manual for details.
• This boiler must be properly vented and connected to an approved vent system in good condition. DO NOT
operate boiler with the absence of an approved vent system.
• This boiler needs fresh air for safe operation and must be installed so there are provisions for adequate
combustion and ventilation air.
• A clean and unobstructed chimney flue is necessary to allow noxious fumes that could cause injury or loss
of life to vent safely and will contribute toward maintaining the boiler's efficiency.
• This boiler is supplied with controls which may cause the boiler to shut down and not re-start without service.
If damage due to frozen pipes is a possibility, the heating system should not be left unattended in cold
weather; or appropriate safeguards and alarms should be installed on the heating system to prevent damage
if the boiler is inoperative..
• This boiler is designed to burn No. 2 fuel oil only. DO NOT use gasoline, crankcase drainings, or any oil
containing gasoline. Never burn garbage or paper in this boiler. DO NOT convert to any solid fuel (i.e. wood,
coal). DO NOT convert to any gaseous fuel (i.e. natural gas, LP). All flammable debris, rags, paper, wood
scraps, etc., should be kept clear of the boiler at all times. Keep the boiler area clean and free of fire hazards.
• All boilers equipped with burner swing door have a potential hazard which if ignored can cause severe
property damage, personal injury or loss of life. Before opening swing door, turn off service switch to boiler to
prevent accidental firing of burner outside the combustion chamber. Be sure to tighten swing door fastener
completely when service is completed.
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Table 1-2: Dimensional Data
Table 1-2: Rating Data
BoilerBoiler
ModelModel
Burner CapacityBurner Capacity HeatingHeating
CapacityCapacity(2)(2) NET AHRI RatingsNET AHRI Ratings (3)(3)
AFUEAFUE
%%
GPHGPH MBHMBH (1)(1) MBHMBH MBHMBH Sq. Ft.Sq. Ft.
CL-3-105SECL-3-105SE 0.750.75 105105 9191 6868 284284 85.785.7
CL3-410SECL3-410SE 1.001.00 140140 121121 9191 378378 85.085.0
CL4-168SECL4-168SE 1.201.20 168168 147147 110110 459459 86.486.4
CL4-210SECL4-210SE 1.501.50 210210 181181 136136 566566 85.185.1
CL5-245SECL5-245SE 1.751.75 245245 212212 159159 663663 85.685.6
CL5-266SECL5-266SE 1.901.90 266266 230230 173173 719719 85.385.3
(1)(1) MBH refers to thousands of BTU per hour.MBH refers to thousands of BTU per hour.
(2)(2) Based on standard test procedure prescribed by the United States Department ofBased on standard test procedure prescribed by the United States Department of
Energy at combustion conditions of 13.0% COEnergy at combustion conditions of 13.0% CO22..
(3)(3) Net AHRI Ratings are based on piping and pickup allowance of 1.333 for steam.Net AHRI Ratings are based on piping and pickup allowance of 1.333 for steam.
The CL Series boiler is a cast iron oil-fired low
pressure steam boiler designed for use in closed
heating steam systems. This boiler must be vented
by natural draft into a fireclay tile-lined masonry
chimney or chimney constructed from type L vent or
a factory built chimney that complies with the type HT
requirements of UL103. An adequate supply of air for
combustion, ventilation and dilution of flue gases must
be available in the boiler room.
The CL Series steam boiler uses a L404F
Pressure Limit and Low Water Cut-off. This boiler
has indirect domestic water heater connections
to generate domestic hot water. Optionally, this
boiler may include a L4006 Temperature Limit and
a tankless heater to generate domestic hot water.
1Product Description, Specification and Dimensional Data
BoilerBoiler
ModelModel
DimensionsDimensions
Approv. WaterApprov. Water
Content GallonsContent Gallons
Heat TransferHeat Transfer
Surface AreaSurface Area
Sq. Ft.Sq. Ft.
Recommended Minimum ChimneyRecommended Minimum Chimney
"A""A" "B""B" "C""C" Round in Dia.Round in Dia. RectangleRectangle
in. x in.in. x in.
CL3CL3 17-3/8"17-3/8" 8-1/4"8-1/4" 5-7/8"5-7/8" 1616 14.3314.33 66
8 X 88 X 8
CL4CL4 22-3/8"22-3/8" 10-7/8"10-7/8" 6-7/8"6-7/8" 2020 20.9020.90 77
CL5CL5 27-3/8"27-3/8" 13-3/8"13-3/8" 7-7/8"7-7/8" 2424 27.4627.46 88
Maximum working water pressure: 15 PSI shipped standard from factory.Maximum working water pressure: 15 PSI shipped standard from factory.

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Figure 1-3: Steam Boiler with or without Tankless Heater
'A'
'B'
'C'
DIA.
1Product Description, Specification and Dimensional Data (continued)

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Figure 2-1: Minimum Installation Clearances To Combustible Materials (Inches)
A. INSPECT SHIPMENT carefully for any signs of
damage.
1. All equipment is carefully manufactured,
inspected and packed. Our responsibility
ceases upon delivery of crated boiler to the
carrier in good condition.
2. Any claims for damage or shortage in shipment
must be filed immediately against the carrier
by the consignee. No claims for variances
from, or shortage in orders, will be allowed by
the manufacturer unless presented within sixty
(60) days after receipt of goods.
B. LOCATE BOILER in front of final position before
removing crate. See Figure 1-1.
1. LOCATE so that vent pipe connection to
chimney will be short and direct.
2. BOILER IS SUITABLE FOR INSTALLATION
ON COMBUSTIBLE FLOOR. Boiler cannot be
installed on carpeting.
3. FOR BASEMENT INSTALLATION, provide a
solid elevated base, such as concrete, if floor
is not level, or if water may be encountered on
floor around boiler.
4. PROVIDE SERVICE CLEARANCE of at least
24” clearance from front jacket panel for
servicing. If boiler is equipped with a rear
tankless heater, provide at least 24" service
clearance on the right side of the boiler.
Boiler flueways may be cleaned from the top.
Provide at least 24" clearance from the top of
the boiler for cleaning flueways.
5. For minimum clearances to combustible
materials. See Figure 2-1.
C. PROVIDE COMBUSTION AND VENTILATION
AIR. Local and National Codes may apply and
should be referenced.
NOTES:
1. Listed clearances comply with American
National Standard ANSI/NFPA 31, Installation
of Oil Burning Equipment.
2. CL Series boilers can be installed in rooms
with clearances from combustible material
as listed above. Listed clearances cannot be
reduced for alcove or closet installations.
3. For reduced clearances to combustible
material, protection must be provided as
described in the above ANSI/NFPA 31
standard.
2Pre-Installation

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1. Determine volume of space (boiler room).
Rooms communicating directly with the
space in which the appliances are installed,
through openings not furnished with doors, are
considered a part of the space.
Volume(ft3) = Length(ft) x Width(ft) x Height(ft)
2. Determine total input of all appliances in the
space.
Add inputs of all appliances in the space and
round the result to the nearest 1000 BTU per
hour.
3. Determine type of space. Divide Volume by
total input of all appliances in space. If the
result is greater than or equal to 50 ft3/1000
BTU per hour, then it is considered an
unconfined space. If the result is less than
50 ft3/1000 BTU per hour then the space is
considered a confined space.
4. For boiler located in an unconfined space of a
conventionally constructed building, the fresh
air infiltration through cracks around windows
and doors normally provides adequate air for
combustion and ventilation.
5. For boiler located in a confined space or an
unconfined space in a building of unusually
tight construction, provide outdoor air.
a. Outdoor air may be provided with the
use of two permanent openings which
communicate directly or by duct with the
outdoors or spaces (crawl or attic) freely
communicating with the outdoors. Locate
one opening within 12 inches of top of
space. Locate remaining opening within
12 inches of bottom of space. Minimum
dimension of air opening is 3 inches. Size
each opening per following:
i. Direct communication with outdoors.
Minimum free area of 1 square inch
per 4,000 BTU per hour input of all
equipment in space.
ii. Vertical ducts. Minimum free area of
1 square inch per 4,000 BTU per hour
input of all equipment in space. Duct
cross-sectional area shall be same as
opening free area.
iii. Horizontal ducts. Minimum free area of
1 square inch per 2,000 BTU per hour
input of all equipment in space. Duct
cross-sectional area shall be same as
opening free area.
Alternate method for boiler located
within confined space.Use indoor air if
two permanent openings communicate
directly with additional space(s) of
sufficient volume such that combined
volume of all spaces meet criteria for
unconfined space. Size each opening
for minimum free area of 1 square inch
per 1,000 BTU per hour input of all
equipment in spaces, but not less than
100 square inches.
6. Louvers and Grilles of Ventilation Ducts
a. All outside openings should be screened
and louvered. Screens used should not be
smaller than 1/4 inch mesh. Louvers will
prevent the entrance of rain and snow.
b. Free area requirements need to consider
the blocking effect of louvers, grilles, or
screens protecting the openings. If the free
area of the louver or grille is not known,
assume wood louvers have 20-25 percent
free area and metal louvers and grilles have
60-75 percent free area.
c. Louvers and grilles must be fixed in the
open position, or interlocked with the
equipment to open automatically during
equipment operation.
NOTICE: Clearance to venting is for single wall
vent pipe. If Type L vent is used, clearance may
be reduced to the minimum required by the vent
pipe manufacturer.
2Pre-Installation (continued)
WARNING
Adequate combustion and ventilation air must
be provided to assure proper combustion and
to maintain safe ambient air temperatures.
DO NOT install boiler where gasoline or other
flammable vapors or liquids, or sources of
hydrocarbons (i.e. bleaches, fabric softeners,
etc.) are used or stored.
!

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A. EVALUATE THE EXISTING STEAM SYSTEM.
The single most important factor in determining
the expected life cycle of a steam boiler, is
the amount of fresh water added to the boiler
during operation. Fresh water brings minerals
and oxygen into the boiler. These contaminants
greatly accelerate corrosion of the cast iron boiler
sections.
1. Assure that all system radiators, piping and
vents are absolutely leak tight.
a. When a steam boiler is installed in an
existing system, ALL air vents should be
replaced at the same time. This assures
that the new boiler will not be compromised
by existing system leaks.
b. If the system contains hidden supply or
return piping (hidden behind walls, buried
in concrete, etc.) pressure test this piping to
assure there are no leaks.
2. Repair any leaks in the system.
3. Install accurate water meter on the fresh water
supply to the boiler.
B. CONNECT SYSTEM SUPPLY AND RETURN
PIPING TO BOILER. See Figure 3-1 for piping
details. Also consult Residential Hydronic
Heating Installation and Design I=B=R Guide.
CAUTION
Maintain minimum ½ inch clearance from hot
water piping to combustible materials.
NOTICE Before using copper for steam piping, consider the following characteristics of copper piping:
1. high coefficient of thermal expansion can induce mechanical stresses and cause expansion/
contraction noises if not accounted for in the piping system design and installation,
2. high heat transfer rate (heat loss) of uninsulated copper piping must be included in the normal
piping and pickup factors used to size the boiler,
3. soldering or brazing pastes and fluxes that end up in the system can cause poor heat transfer,
surging, an unsteady water line and wet steam if not thoroughly removed during the boil out
procedure and,
4. galvanic corrosion of the adjoining metal may occur due to dissimilar metals in certain water
chemistries if dielectric unions are not used.
3Steam Boiler Piping and Trim
WARNING
• Failure to properly pipe boiler may result in improper operation and damage to boiler or structure.
• DO NOT increase steam boiler input above the ratings.
• DO NOT use softened water in steam boilers. Accelerated boiler corrosion will result. Tie in fresh water
supply to the boiler upstream of a water softener.
• Oxygen contamination of boiler water will cause corrosion of iron and steel boiler components, and can
lead to boiler failure. U.S. Boiler Company's Standard Warranty does not cover problems caused by oxygen
contamination of boiler water or scale (lime) build-up caused by frequent addition of water.
!
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CL Installation & Service Manual
Figure 3-1: Recommended Boiler Piping for Gravity Return Steam Boiler
NOTICE Failure to pipe boiler as specified in this manual may result in excessive system noise, water line
fluctuations and water carry over.
3Steam Boiler Piping and Trim (continued)

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A. CONNECT TANKLESS HEATER PIPING as
shown in Figure 4-1. See Table 4-2 for Tankless
Heater Rating.
THE FOLLOWING GUIDELINES SHOULD BE
FOLLOWED WHEN PIPING THE TANKLESS
HEATER:
1. FLOW REGULATION — If flow through the
heater is greater than its rating, the supply of
adequate hot water may not be able to keep
up with the demand. For this reason a flow
regulator matching the heater rating should
be installed in the cold water line to the heater.
The flow regulator should preferably be located
below the inlet to the heater and a minimum of
3’ away from the inlet so that the regulator is
not subjected to excess temperatures that may
occur during “off” periods when it is possible
for heat to be conducted back through the
supply line. The flow regulator also limits
the flow of supply water regardless of inlet
pressure variations in the range of 20 to 125
psi.
2. TEMPERING OF HOT WATER — Installation
of an automatic mixing valve will lengthen the
delivery of the available hot water by mixing
some cold water with the hot. This prevents
the possibility of scalding hot water at the
fixtures. In addition, savings of hot water will be
achieved since the user will not waste as much
hot water while seeking a water temperature.
Higher temperature hot water required by
dishwashers and automatic washers is
possible by piping the hot water from the
heater prior to entering the mixing valve. The
mixing valve should be “trapped” by installing
it below the cold water inlet to heater to prevent
lime formation in the valve. Refer to Figure 4-1.
3. FLUSHING OF HEATER — All water
contains some sediment which settles on the
inside of the coil. Consequently, the heater
should be periodically back washed. This
is accomplished by installing hose bibs as
illustrated and allowing water at city pressure
to run into hose bib A, through the heater, and
out hose bib B until the discharge is clear. The
tees in which the hose bibs are located should
be the same size as heater connections to
minimize pressure drop.
4. HARD WATER — A water analysis is
necessary to determine the hardness of your
potable water. This is applicable to some
city water and particularly to well water.
An appropriate water softener should be
installed based on the analysis and dealer’s
recommendation. This is not only beneficial to
the tankless heater but to piping and fixtures
plus the many other benefits derived from soft
water.
WARNING
Install automatic mixing valve at tankless heater
outlet to avoid risk of burns or scalding due
to excessively hot water at fixtures. Adjust
and maintain the mixing valve in accordance
with the manufacturer's instructions. DO NOT
operate tankless heater without mixing valve.
NOTICE During summertime operation, the
normal water line on a steam boiler can be raised
1", from 22-5/8" to 23-5/8" (see Figure 1-1) for
improved tankless heater performance on steam
boilers.
Use street elbow fittings in tankless in and out
connections to assure adequate clearance of
piping.
4Tankless and Indirect Water Heater Piping
CAUTION
Use of hard water with a tankless coil will, over
a short period of time, reduce the output of the
coil, reduce flow due to increased pressure
drop and reduce the useful life of the coil.
!
!

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Figure 4-1: Schematic Tankless Heater Piping
Table 4-2: Tankless Heater Data:
Boiler
Series
Rating
(Gal/Min)
Pressure Drop
(PSI)
CL3-105SE-T 3.00 4.7
CL3-140SE-T 3.25 5.6
CL4-168SE-T 3.75 7.2
CL4-210SE-T 4.00 8.0
CL5-245SE-T 4.25 8.8
CL5-266SE-T 4.75 9.6
4Tankless and Indirect Water Heater Piping (continued)

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Figure 4-3: Indirect Domestic Water Heater Piping with V8H Steam Boiler
B. CONNECT INDIRECT DOMESTIC WATER
HEATER PIPING as shown in Figure 4-3.
1. Refer to Indirect Water Heater Installation,
Operating, and Service Instructions for
additional information.
4Tankless and Indirect Water Heater Piping (continued)

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A. GENERAL VENTING GUIDELINES
1. Chimney venting is an important part of a safe
and efficient oil fired appliance system. Contact
your local fire and building officials on specific
requirements for restrictions and the installation
of fuel oil burning equipment. In addition,
consult with a professional knowledgeable on
the requirements of NFPA 31 – Standard for
the Installation of Oil-Burning Equipment and
NFPA 211 - Standard for Chimneys, Fireplaces,
Vents, and Solid Fuel-Burning Appliances for
installations in the United States.
2. The safe venting of oil fired boilers is dependant
on many factors. Some of these factors include:
a. sufficient draft during the entire heating season
to allow for the safe discharge of combustion
by-products and;
b. suitable corrosion protection in the event of
condensing flue gases. Only a trained and
qualified contractor may install this product.
3. The CL shall be vented into any of the
following:
a. Masonry or metal chimney. Build and install
in accordance with local buildings codes;
or local authority having jurisdiction; or
“Standards for Chimney, Fireplace, Vents,
and Solid Fuel Burning Appliances”, ANSI/
NFPA 211 and/or National Building Code of
Canada. Masonry chimney must be lined
with listed chimney system. Listed clay
flue lined masonry chimneys meet venting
requirements.
• External chimneys are more susceptible
to flue gas condensation due to colder
outside air temperatures. To prevent
corrosion due to flue gas condensation,
use a listed corrosion-resistant metal
liner in chimney.
• Oversized chimneys are more
susceptible to flue gas condensation.
To reduce the likelihood of flue gas
condensation and ensure proper draft,
use a properly sized listed metal liner in
oversized chimney.
4. Chimney Inspection – Prior to the installation
of any new or replacement fuel burning
equipment the chimney shall be inspected
by a qualified installer. The chimney shall
be inspected for integrity as well as for
proper draft and condensate control. Some
jurisdictions require the use of a liner when
changing fuel types. Some jurisdictions
require the use of a liner even when the same
fuel is used. At a minimum, the chimney
shall be examined by a qualified person in
accordance with the requirements of Chapter
11 of NFPA 211, Standard for Chimneys,
Fireplaces, Vents, and Solid Fuel-Burning
Appliances.
a. Loose Mortar – Loose mortar could be an
indication of a prior history of condensing flue
gases upon the inside walls of the chimney.
Colder climates are more susceptible to this
condition. Under no circumstances shall a
chimney of this condition be used until it meets
the requirements of NFPA 211 or CSA B139.
b. Unlined Chimney – Under no circumstances
shall a chimney constructed of brick only be
used. Only approved clay liners or listed
chimney lining systems shall be used as
specified in NFPA 31.
c. Abandoned Openings – Openings through
the chimney wall that are no longer used
shall be sealed in accordance to NFPA 211.
Often abandoned openings are improperly
sealed and usually covered by a gypsum wall
covering.
5Venting
WARNING
• Vent this boiler according to these instructions. Failure to do so may cause products of combustion to enter
the home resulting in severe property damage, personal injury or death.
• Insufficient Combustion Air Supply may result in the production and release of deadly carbon monoxide (CO)
into the home which can cause severe personal injury or death.
• Improper venting may result in property damage and the release of flue gases which contain deadly carbon
monoxide (CO) into the home, which can cause severe personal injury, death, or substantial property
damage.
• Inspect existing chimney and vent connector for obstructions and deterioration before installing boiler.
Failure to clean or replace perforated pipe or chimney liner will cause severe injury or death.
• Do not de-rate the appliance. Failure to fire the boiler at it's designed input may cause excessive
condensation upon the interior walls of the chimney. In addition, the lower input may not create enough draft
to adequately evacuate the by-products of combustion.
!

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Figure 5-2: Proper and Improper Locations of Draft Regulator
Figure 5-1: Recommended Vent Pipe Arrangement and Chimney Requirements
5Venting (continued)

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CL Installation & Service Manual
d. Clean Chimney – Chimney shall be free of all
loose debris.
5. Draft Regulator – the draft regulator must be used
with this appliance. Refer to Figures 5-1 and 5-2.
B. CHIMNEY CONNECTOR
1. A chimney connector (vent pipe) is used to
connect the boiler to the base of the chimney.
The chimney connector should be kept as short
as possible. The horizontal length of the chimney
connector shall not be greater than 10 feet.
2. Vent Connector shall be any of the following
and of the same size as the outlet of boiler.
a. Type L or a factory built chimney material
that complies with the Type HT requirements
of ANSI/UL 103. Install in accordance with
listing and manufacturer’s instructions.
b. Steel pipe having resistance to corrosion
and heat with a minimum wall thickness of
24 Gauge (0.024”).
C. DRAFT
1. The natural draft generated through a chimney is
dependent on several factors including, chimney
height, temperature of flue gases, cross section
area of chimney, chimney wall insulation value,
dilution air and total volume of flue gases, to
name a few. Make sure that the boiler has been
running for at least 5 minutes before measuring
the draft.
2. Minimum Draft Overfire – The draft induced by a
chimney must create at least a pressure of -0.02
inches water column (“ w.c.). The pressure at
the canopy cannot be positive since this could
create a condition that allows flue gas by-products
to escape from the draft regulator. A negative
pressure reading up to -.03 inches water column
is acceptable for proper operation.
D. STACK TEMPERATURE
1. The temperature of the flue gases has a significant
effect on the amount of draft created in a vertical
chimney as well as the propensity to create
condensate. The higher the stack temperature,
the greater the amount of draft that can be
generated. A lower stack temperature not only
reduces the amount of draft that can be created
but it also increases the possibility that the flue
gases could condense in the chimney connector
or stack.
2. NFPA 31 has information to help the installer make
an appropriate choice of venting materials. In
some cases a chimney may have to be lined to
create sufficient draft. In other cases, the chimney
may have to be lined to prevent the corrosion
of a masonry chimney. Consult with a chimney
specialist knowledgeable on the requirements
for chimney requirements in your area.
DANGER
The chimney and connector shall be inspected
annually for signs of debris and corrosion.
Loose mortar at the base of the chimney may be
a sign of condensate damage to the chimney.
A chimney professional shall be contacted
immediately to examine the damage and
recommend a solution. Long term operation
while in this condition may cause a venting
failure and force flue gases into the living
space. If the chimney is to be re-lined use the
recommendations in NFPA 31, Appendix E.
DANGER
Any sign of condensate seepage at the base
of the chimney shall be inspected immediately.
The discoloration may be a sign of chimney
damage and must be remedied immediately.
5Venting (continued)
!
!
CAUTION
Any doubt on the condition of a chimney
or it’s ability to prevent the generation and
accumulation of flue gas condensate, must be
relined according to NFPA 31 (United States).
Use the chimney venting tables as a guide. It
is highly recommended that any borderline
application should result in the relining of
the chimney with a suitable liner that creates
sufficient draft and to protect against corrosion
caused by flue gas condensate.
!

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6Electrical
WARNING
• Failure to properly wire electrical connections to the boiler may result in serious physical harm.
• Electrical power may be from more than one source. Make sure all power is off before attempting any
electrical work.
• Each boiler must be protected with a properly sized fused disconnect.
• Never jump out or make inoperative any safety or operating controls.
• The primary control may be damaged or may not function properly if 120 volt power supply is NOT wired into
control as follows:
The 120V interrupted hot (black) wire must be connected to the primary control black wire, the 120V neutral
(white) wire must be connected to the primary control white wire and the 120V constant hot (red) wire must be
connected to the primary control red wire.
!
DANGER
Positively assure all electrical connections are unpowered before attempting installation or service of electrical
components or connections of the boiler or building. Lock out all electrical boxes with padlock once power is
turned off.
!
A. GENERAL
1. Install wiring and electrically ground boiler in
accordance with requirements of the authority
having jurisdiction, or in absence of such
requirements the National Electrical Code, ANSI/
NFPA 70.
2. Refer to National Electric Code or Local Electric
Codes for proper size and type of wire required.
Follow Code.
3. A separate electrical circuit must be run from
the mail electrical service with an over-current
device/disconnect in the circuit. A service
switch is recommended and may be required
by some local jurisdictions.
4. Use anti-short bushings on all wiring passing
through boiler jacket, junction boxes and/or
control boxes.
5. Use armored cable (BX) over all exposed line
voltage wiring.
6. If an indirect domestic water heater is used,
use priority zoning. DO NOT use priority zoning
for Hydro-Air Systems.
7. Wiring should conform to Figures 6-1 and 6-2.
B. INSTALL A ROOM THERMOSTAT on an inside
wall about four feet above floor. Never install
thermostat on an outside wall or where it will be
influenced by drafts, hot or cold water pipes,
lighting fixtures, television, rays of the sun or
near a fireplace. Keep large furniture away from
thermostat so there will be free movement of room
air around this control.

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Figure 6-1: Schematic Wiring Diagram, Steam Boiler,McDonnell & Miller PSE-801 Probe LWCO (All Burner Options)
6Electrical (continued)

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Figure 6-2: Schematic Wiring Diagrams For All Burner Options w/Various Oil Primary Controls
6Electrical (continued)

20 110772-01 - 5/20
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Figure 7-1: Single Pipe Oil Line
A. GENERAL
1. Use flexible oil line(s) so the burner swing door
can be opened without disconnecting the oil
supply piping.
2. A supply line fuel oil filter is recommended as a
minimum for all firing rates but a pleated paper
fuel oil filter is recommended for the firing rates
below 1.0 GPH to prevent nozzle fouling.
3. Use Flared fittings only. Cast iron fittings
cannot be used.
NOTICE DO NOT use compression fittings.
Oil piping must be absolutely airtight or leaks
or loss of prime may result. Bleed line and fuel
unit completely.
Refer to your local jurisdictions regarding
any special considerations for fuel supply
requirements. In addition, refer to NFPA 31,
Standard for the Installation of Oil-Burning
Equipment for Installations in the United States
and CSA B139-04 for Installation in Canada.
4. Use of a high efficiency micron filter (Garber or
equivalent) in addition to a conventional filter is
highly recommended.
5. Piping used to connect the oil burner to the oil
supply tank shall not be smaller than 3/8" iron
pipe or 3/8" OD copper tubing. Copper tubing
shall have a .032" minimum wall thickness.
WARNING
Under no circumstances can copper with sweat
style connectors be used.
NOTICE Some jurisdictions require the use of a
fusible shutoff valve at the tank and/or the burner.
In addition, some jurisdictions require the use of a
fusible electrical interlock with the burner circuit.
Check your local Codes for special requirements.
B. SINGLE PIPE OIL LINES
1. Standard burners are provided with single-
stage 3450 RPM fuel units with the bypass
plug removed for single-pipe installations.
2. The single-stage fuel unit may be installed
single-pipe with gravity feed or lift. Maximum
allowable lift is 8 feet. See Figure 7-1.
3. Fuel Oil Line Deaerator – On many occasions
a leaky oil delivery line can introduce air
into the fuel oil supply system. This often
creates a rough starting condition and can
create a burner lockout state. In addition to
fixing the leak, a fuel line deaerator can be
installed to eliminate air. The single line from
the fuel tank is connected to the deaerator.
The burner pump must be connected to the
deaerator as a two pipe system. Follow the
oil pump manufacturer’s recommendations for
conversion to a two pipe system.
7Oil Piping
!