DOM-I0M-11
82-0262
Finned Copper Tube
Gas Boilers (DB) &
Water Heaters (DW)
Boiler Manual
Installation and Operation
Instructions
is manual is intended only for use by a qualied heating installer/technician. Read and follow this manual, all supplements and related
instructional information provided with the boiler. Install, start and service the boiler only in the sequence and methods given in these
instructions. Failure to do so can result in severe personal injury, death or substantial property damage.
Do not use the boiler during construction. Construction dust and particulate, particularly drywall dust, will cause contamination
of the burner, resulting in possible severe personal injury, death or substantial property damage. e boiler can only be operated with
a dust-free air supply. Follow the instruction manual procedures to duct air to the boiler air intake. If the boiler has been contaminated
by operation with contaminated air, follow the instruction manual guidelines to clean, repair or replace the boiler if necessary.
Ax these instructions near to the boiler. Instruct the building owner to retain the instructions for future use by a qualied service
technician, and to follow all guidelines in the User’s Information Manual.
03/16 Copyright 2014 Mestek, Inc.
Finned copper tube gas boilers & water heaters – Boiler Manual
If the information in this manual is not followed
exactly, a fire or explosion may result causing property,
personal injury or loss of life.
Do not store or use gasoline or other flammable vapors
and liquids in the vicinity of this or any other applianc
WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any electrical switch. Do not use any
phone in your building.
• Immediately call your gas supplier from a phone outside
the building. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire
department.
Installation and service must be performed by a qualified
installer, service agency or the gas supplier.
Assurez-vous de bien suivre les instructions données
dans cette notice pour réduire au minimum le risque
d’incendie ou d’explosion ou pour éviter tout dommoge
matériel, toute blessure ou la mort
Ne pas entreposer ni utiliser d’essence ou ni d’autres
vapeurs ou liquides inflammables à proximité de cet
appareil ou de tout autre appareil.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ:
• Ne pas tenter d’allumer d’appareil.
• Ne touchez à aucun interrupteur; ne pas vous servir
des téléphones se trouvant dans le bâtiment.
• Appelez immédiatement votre fournisseur de gas depuis
un voisin. Suivez les intructions du fournisseur.
• Si vous ne purvez rejoindre le fournisseur, appelez le
service des incendies.
L’installation et l’entretien doivent être assurés par un
installateur ou un service d’entretien qualifié ou par le
fournisseur de gaz.
Failure to properly vent this unit can cause excessive
amounts of carbon monoxide resulting in severe
personal injury or death!
DESIGNED AND TESTED ACCORDING TO A.S.M.E.
BOILER AND PRESSURE VESSEL CODE, SECTION
IV FOR A MAXIMUM ALLOWABLE WORKING PRESSURE OF 160 PSI, 1103 kPa WATER.
2
BEFORE YOUR START . . . . . . . . . . . . . . . . PAGE 2
RATINGS & CAPACITIES . . . . . . . . . . . . . . . PAGE 3
BOILER/WATER HEATER LOCATION . . . . . . . . .PAGE 3
COMBUSTION AIR & VENTILATION . . . . . . . . . . PAGE 3
GENERAL VENTING GUIDELINES. . . . . . . . . . . PAGE 9
VENTING OPTIONS . . . . . . . . . . . . . . . . . .PAGE 9
VERTICAL/CHIMNEY VENTING . . . . . . . . . . . PAGE 10
OUTDOOR VENTING . . . . . . . . . . . . . . . . PAGE 11
COMMON VENT SYSTEMS . . . . . . . . . . . . . PAGE 12
GENERAL PIPING REQUIREMENTS . . . . . . . . PAGE 13
HEATING SYSTEM PIPING . . . . . . . . . . . . . PAGE 15
DOMESTIC WATER SUPPLY PIPING . . . . . . . . PAGE 18
GAS SUPPLY PIPING . . . . . . . . . . . . . . . . PAGE 21
ELECTRICAL WIRING . . . . . . . . . . . . . . . . PAGE 22
GENERAL OPERATION . . . . . . . . . . . . . . . PAGE 22
BOILER/WATER HEATER OPERATION . . . . . . . PAGE 23
OPERATING INSTRUCTIONS . . . . . . . . . . . . PAGE 27
CHECKING & ADJUSTMENTS. . . . . . . . . . . . PAGE 30
CONTROL DESCRIPTION . . . . . . . . . . . . . . PAGE 31
MAINTENANCE . . . . . . . . . . . . . . . . . . . PAGE 33
TROUBLE-SHOOTING . . . . . . . . . . . . . . . . PAGE 36
REPAIR PARTS . . . . . . . . . . . . . . . . . . . . PAGE 38
START UP FORM . . . . . . . . . . . . . . . . . . . PAGE 45
BEFORE YOU START
This manual covers the application, installation, operation and
maintenance of a Dominator Series finned copper heating boiler/
water heater/(pool heater-Canada only).
To obtain the safe, dependable, efficient operation and long life for
which this heating boiler/water heater was designed, these instructions must be read, understood and followed.
The Dominator Series finned copper heating boiler/water heaters
have been design certified by CSA for use with natural and propane
gas under the latest revision of ANSI-Z21.10.3/CSA 4.3, Gas Water
Heaters, and ANSI-Z21.13/CSA 4.9, Gas-Fired Low Pressure Steam
and Hot Water Boilers ANSI-Z21.56/CSA 4.7 Gas Fired Pool
Heaters (Canada only) and CAN 1-3.1 Industrial and Commercial
Gas Fired Packaged Boilers. Each unit has been constructed and
hydrostatically tested for a maximum working pressure of 160 psi,
1103 kPa in accordance with Section IV of the A.S.M.E. Boiler and
Pressure Vessel Code.
All aspects of the boiler/water heater installation must conform to
the requirements of the authority having jurisdiction, or, in the
absence of such requirements, to the National Fuel Gas Code, ANSI
Z223.1/NFPA 54-latest revision. Where required by the authority
having jurisdiction, the installation must conform to the Standard
for Controls and Safety Devices for Automatically Fired Boilers,
ANSI/ASME CSD-1.
Finned copper tube gas boilers & water heaters – Boiler Manual
In Canada, the installation must be in accordance with the
requirements of CSA B149.1 or .2, Installation Code for Gas Burning
Appliances and Equipment.
If installed in the Commonwealth of Massachusetts, you MUST
FOLLOW the additional instructions contained in the back of this
manual, MACODE-3.
The owner should maintain a record of all service work performed
with the date and a description of the work done. Include the name
of the service organization for future reference.
Direct all questions to your RBI distributor or contact the
RBI Customer Service Department, 260 North Elm Street, Westfield,
MA 01085 for U.S. or 7555 Tranmere Drive, Mississauga ONT
L5S 1L4 for Canada. Always include the model and serial numbers
from the rating plate of the boiler/water heater in question.
RATINGS & CAPACITIES
Before undertaking the installation of the Dominator Series
boiler/water heater check the rating plate to ensure that the unit
has been sized properly for the job. The "Net Ratings" specify
the equivalent amount of direct copper radiation that the unit
can supply under normal conditions. Also ensure that the unit
has been set up for the type of gas available at the installation
site. Other important considerations are the avai lability of an adequate
electrical supply, fresh air for combustion and a suitable chimney
or vent system.
BOILER/WATER HEATER LOCATION
1. This boiler/water heater is suitable for indoor and outdoor
installations. Locate the boiler/water heater in an area that
provides good access to the unit. Servicing may require the
removal of jacket panels. Allow the minimum clearances between
adjacent construction and the boiler/water heater as listed in
Table 1.
Service clearances are not mandatory, but are
recommended to ensure ease of service should it be
required.
Table 1
Clearance to
Combustibles
Top 6 153 20 508
Back 6 153 24 610
Left Side 6 153 24 610
Right Side 6 153 24 610
Front 6 153 30 762
Flue 6 153
in mm in mm
Service
Clearance
2. An optimum site will be level, central to the piping system, close
to a chimney or outside wall and have adequate fresh air for
combustion. Ensure that the boiler/water heater is level from
front to back and from side to side. Use metal shims to level
the boiler/water heater. Electrical and electronic components
must also be protected from exposure to water during operation
and maintenance. DO NOT install this boiler/water heater in
a location that would subject any of the gas ignition components
to direct contact with water or excessive moisture during
operation or servicing.
3. Ensure that the floor is structurally sound and will support the
weight of the boiler/water heater.
The Dominator may be installed directly on combus-
tible flooring, but never on carpeting.
4. Locate the boiler/water heater in an area that will prevent water
damage to adjacent construction should a leak occur or during
routine maintenance. If such a location doesn't exist, a suitable
drain pan that's adequately drained must be installed under the
unit.
5. DO NOT place this boiler/water heater in a location that would
restrict the introduction of combustion air into the unit or subject
the air inlet to a negative
pressure, see “GENERAL VENTING
GUIDELINES”.
Never store combustible materials, gasoline or any
product containing flammable vapors or liquids in the
vicinity of the boiler/water heater. Failure to comply
with this warning can result in an explosion or fire
causing extensive property damage, severe personal
injury or death!
6. NEVER place this boiler/water heater in a location that would
subject it to temperatures at or near freezing. See the “Freeze
Protection” section on page 13.
Units installed outdoors MUST be protected from ice
and snow accumulation or the unit may be damaged
voiding the warranty!
COMBUSTION AIR & VENTILATION
This boiler/water heater must be supplied with
combustion air in accordance with Section 5.3, Air
for Combustion & Ventilation, of the latest revision
of the National Fuel Gas Code, ANSI Z223.1/NFPA
54 and all applicable local building codes. Canadian
installations must comply with CSA B149.1 or .2
Installation Code for Gas Burning Appliances and
Equipment, or applicable provisions of the local
building codes. Failure to provide adequate combustion
air for this boiler/water heater can result in excessive
levels of carbon monoxide which can result in severe
personal injury or death!
3
Finned copper tube gas boilers & water heaters – Boiler Manual
To operate properly and safely this boiler/water heater requires a
continuous supply of air for combustion. NEVER store objects on
or around the boiler/water heater!
Combustion air contaminated with fluorocarbons or
other halogenated compounds such as cleaning
solvents and refrigerants will result in the formation
of acids in the combustion chamber. These acids will
cause premature failure of the boiler/water heater
voiding the warranty!
If the boiler/water heater is operated while the building
is under construction it MUST be protected from
wood, concrete, sheet rock and other types of dust.
Failure to properly protect the unit from construction
dust will damage the unit voiding the warranty!
Buildings will require the installation of a fresh air duct or other
means of providing make-up air if the intake air option isn't used.
Any building utilizing other gas burning appliances, a fireplace, wood
stove or any type of exhaust fan must be checked for adequate
combustion air when all of these devices are in operation at one
time. Sizing of an outside air duct must be done to meet the
requirements of all such devices.
Never operate the Dominator in an environment
subjected to a negative pressure unless the air intake
is connected to the outdoors. Failure to comply with
this warning can result in excessive levels of carbon
monoxide causing severe personal injury or death!
All Air From Inside The Building
If the Dominator is to be located in a confined space the minimum
clearances listed in Table 1 must be maintained between it and any
combustible construction. When installed in a confined space
without the intake air option, Figures 1, 2 & 3, two permanent
openings communicating with an additional room(s) are required.
The combined volume of these spaces must have sufficient volume
to meet the combustion air requirements of all gas utilization
equipment. Fireplaces, wood stoves or any type of exhaust fan must
be considered when making this determination. Each opening must
have a minimum free area of 1 in2/1000 Btu/hr, 2200 mm2/kW
based on the total input rating of ALL gas utilization equipment in
the confined area. Each opening must be no less than 100 in2,
64,516 mm2 in size. The upper opening must be within 12 in,
305 mm of, but not less than 3 in, 76 mm from, the top of the
enclosure. The bottom opening must be within 12 in, 305 mm of,
but not less than 3 in, 76 mm from, the bottom of the enclosure.
Figure 1 Figure 1 - Vertical Venting with a Metal Chimney System and Inside Air
10 FT
4
Finned copper tube gas boilers & water heaters – Boiler Manual
Figure 2 Vertical Venting using a Masonry Chimney and Inside Air
305 TO 457
12 TO 18
MINIMUM VERTICAL RISE
24
610
Figure 3 Horizontal Venting using Inside Air
1.5 FT 0.5 m
Table 2
VENT PIPE DIAMETER
IN mm IN mm
5 TO 10
127 TO 254
1/4 IN. PER F00T 20 mm/m
OFF THE TOP OF UNIT "A"
12
305
5
Finned copper tube gas boilers & water heaters – Boiler Manual
All Air From Outside The Building
When installed in a confined space without utilizing the intake
air option two permanent openings communicating directly with,
or by ducts to, the outdoors or spaces that freely communicate with
the outdoors must be present. The upper opening must be within
12 in, 305 mm of, but not less than 3 in, 76 mm from, the top of the
enclosure. The bottom opening must be within 12 in, 305 mm of,
but not less than 3 in, 76 mm from, the bottom of the enclosure.
Where directly communicating with the outdoors or communicating
with the outdoors through vertical ducts, each opening shall have
a minimum free area of 1 in2/4000 Btu/hr, 550 mm2/kW of
the total input rating of all of the equipment in the enclosure.
Where communicating with the outdoors through horizontal ducts,
each opening shall have a minimum free area of 1 in2/2000 Btu/hr,
1100 mm2/kW of the total input rating of all of the equipment in the
enclosure. When ducts are used, they must have the same crosssectional area as the free area of the opening to which they connect.
When calculating the free area necessary to meet the make-up air
requirements of the enclosure, consideration must be given to the
blockage effects of louvers, grills and screens. Screens must have a
minimum mesh size of 1/4 in, 6.4mm. If the free area through a
louver or grill is not known, ducts should be sized per Table 3.
Table 3 Make-up Air Louver Sizing
Required Cross Sectional Area
2
75% Free Area
Metal Louvers
2
in
cm
Input
(MBH)
300 75 484 100 645 300 1935
400 100 645 133 860 400 2581
600 150 968 200 1290 600 3871
750 188 1210 250 1613 750 4839
900 225 1452 300 1935 900 5806
1050 263 1694 350 2258 1050 6774
1350 338 2177 450 2903 1350 8710
1500 375 2419 500 3226 1500 9677
1950 488 3145 650 4194 1950 12,581
2100 525 3387 700 4516 2100 13,548
1/4 in 6.4 mm
Wire Screen
2
in
cm
Canadian installations must comply with CSA B149.1 when air
supply i s provided by natural air flow from the outdoors for natural
draft, partial fan-assisted, fan-assisted, or power draft-assisted
burners, there shall be a permanent air supply opening(s) having
a cross-sectional area of not less than 1 in2 per 7,000 Btuh
(310 mm2 per kW) up to and including 1 million Btuh, plus
1 in2 per 14,000 Btuh (155 mm2 per kW) in excess of 1 million
Btuh.
2
25% Free Area
Wooden Louvers
in
2
cm
2
Intake Air Option - General Guidelines
This configuration provides combustion air directly to the boiler/
water heater's air intake using a dedicated pipe to obtain combustion
air from the outdoors. Combustion air can be drawn in horizontally
through the same outside wall which terminates the exhaust gases or
vertically through the roof, see Figures 4, 5, 6 & 7.
Common intake air systems may be used provided
the common duct is sized properly and an intake
combustion air damper is installed in the intake air
pipe of each heater. Improper installation can result in
excessive levels of carbon monoxide which can cause
severe personal injury or death!
Single wall galvanized smoke pipe, single wall aluminum pipe or
flexible aluminum pipe can be used for the intake air pipe. It must be
sized per Table 4. All joints in metal combustion air systems must be
secured using corrosion resistant fasteners and sealed using a suitable
Silicone caulk. The combustion air system MUST be supported
by the building structure not the boiler/water heater.
Table 4 Intake Air Pipe Sizing
Model Size
300 & 400 6 152
600 & 750 8 203
900 & 1050 10 254
1350 - 2100 12 305
Pipe Diameter
in mm
A stack damper interlocked with the unit should be
installed in the intake air pipe when the infiltration of
sub-freezing air could occur, otherwise the unit could
freeze up voiding the warranty!
Intake Air Option - Horizontal Guidelines
The maximum equivalent length for the horizontal combustion
air pipe on installations that used the Direct Vent option is 35 ft,
10.8m. The maximum equivalent length for the horizontal
combustion air pipe on installations that use the Horizontal Power
Vent option is 100 ft, 30.5 m. Each 90° elbow and the combustion
air terminal are equal to 10 linear ft, 3.0 m of pipe. If horizontal
runs exceed 5 ft, 1.5 m they must be supported at 3 ft, 0.9 m inter vals
with overhead hangers. The certified combustion air terminal from
RBI must be used and installed as shown in Figures 4 and 5.
Intake Air Option - Vertical Guidelines
The maximum length for the vertical combustion air pipe is 30 ft,
9.1 m plus two 90° elbows. A listed, nonrestrictive combustion air cap
must be used. The combustion air cap must terminate as shown in
Figure 6. The penetration point in the roof must be properly flashed
and sealed.
6
Finned copper tube gas boilers & water heaters – Boiler Manual
Figure 4 Horizontal Combustion Air and Venting for a Single Unit
16 FT 4.9 m
1.5 FT 0.5 m
9
8
Y ,ecnatsiD lacitreV
7
6
5
4
3
2
1
0
0510 15 20
Horizontal Distance, X
1/4 IN. PER FOOT
20 mm/m
1000 BTU'S
2000 & Larger
1201 To 2000
901 To 1200
200 To 900
When running horizontal combustion air and venting for single or multiple units, exhaust and combustion air terminals must be
installed on the same plane (outside wall) in order to prevent pressure dierences due to prevailing winds. In cold climates, doublewall or insulated inlet pipe recommended to prevent condensation.
Figure 5 Horizontal Combustion Air and Venting for a Multiple Units
2 IN. 5.0 cm
1.5 FT 0.5 m
7
Finned copper tube gas boilers & water heaters – Boiler Manual
Figure 6 Vertical Combustion Air and Venting, Metal Chimney System Shown
10 FT 3.1 m
4 FT
1.2 m
5 FT
1.5 m
1.5 FT
0.5 m
5 1/2 FT
1.7 m
Locate exhaust terminal downwind from air intake to reduce potential for ue gas recirculation.
Figure 7 Combination Air Intake and Venting, Masonary Chimney Shown
10 FT 3.1 m
3 FT 1 m
1.5 FT .5m
8
Finned copper tube gas boilers & water heaters – Boiler Manual
GENERAL VENTING GUIDELINES
VENT SYSTEM OPTIONS
The vent installation must be in accordance with Part
7, Venting of Equipment, of the National Fuel Gas
Code, ANSI Z223.1/NFPA 54-latest revision or
applicable provisions of the local building codes.
Canadian installations must comply with CSA B149.1
or .2 Installation Code. Improper venting can result in
excessive levels of carbon monoxide which can result
in severe personal injury or death!
All vent systems must be fully supported by the building structure
and not by the boiler/water heater. Appropriate thimbles and firestops must be used where required.
Common vent systems must be properly engineered
and sized to provide a negative draft of .01 to 0.08 in,
.25 to 2.0 mm WC at the flue outlet! Common positive
pressure vent systems are not to be used. Improper
installation can result in excessive levels of carbon
monoxide which can cause severe personal injury or
death!
A single acting barometric damper must be installed
directly to the boiler/water heater flue outlet to ensure
proper operation. This does not apply to outdoor units
or direct vent positive pressure units.
Some venting applications may require the stop to
be removed for smooth operation. The barometric
damper should be located after the flue collector, refer
to Figures 2, 3 and 7 for proper location. Be sure that
the damper is mounted horizontally (never vertically).
Carefully follow the instructions provided with the
barometric damper. Check with local codes for specific
requirements.
In Canada, B149 (7.25 Draft Regulators) states the
damper shall be of double-acting type.
To avoid spillage into the room of dangerous flue gas
containing carbon monoxide, the opening in damper
must never face against the flow of flue gas.
The Dominator may be vented the following ways:
1) Vertical/Chimney Venting, Negative Pressure, Category
I - uses an approved metal chimney system or properly lined
masonry chimney. Combustion air is obtained from the space
in which the unit is installed or from the outdoors. A barometric
damper must be installed near the flue outlet when venting
vertically. See Fig ures 6 and 7. This also applies to any fan-assisted
chimneys or vents.
2) Direct Vent, Positive Pressure, Category III - for horizontal
vent runs equivalent to 35 ft, 10.7 m or less. A stainless steel vent
system certified to UL 1738 for installations in the United States,
ULS636 for installations in Canada must be used when
combustion air is ducted from outdoors, from the same wall.
3) Horizontal Vent, Negative Pressure, Category I - for
horizontal vent runs equivalent to more than 35 ft, 10.7 m (90°
elbow equals 10 equivalent ft). A dedicated wall mounted power
venter and barometric damper must be used. The vent system
can be single wall galvanized steel or type B vent pipe. Combustion
air is obtained from the space in which the unit is installed or from
the outdoors.
A barometric damper must be installed when the horizontal run
is longer than 35 equivalent ft. (90° elbow = 10 equivalent ft). If
this is the case, a power venter must also be used.
If horizontal run is less than 35 equivalent ft, do not use a
barometric damper. Follow applicable instructions under the
"COMBUSTION AIR & VENTILATION" section.
4) Outdoor Installation - uses the outdoor option kit. Barometric
damper is not required.
All venting, combusiton air material supplied by
installer. All venting material must be approved for
the application. Consult the vent manufacturer’s
product literature.
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Finned copper tube gas boilers & water heaters – Boiler Manual
VERTICAL/CHIMNEY VENTING
The Dominator is listed as a Category I appliance when vented
vertically into a metal chimney system or properly sized masonry
chimney, Figures 1,2, 6 & 7. The chimney must provide a negative
pressure of .01 to 0.08 in, .25 to 2.0 mm W.C. at the boiler/water
heater flue collar with the unit running at full load. A barometric
damper must be installed between the flue collar and the vent
connector. Approved thimbles and fire-stops must be used when
combustible construction is penetrated.
If an appliance using any type of a mechanical draft
system operating under positive pressure is connected
to a chimney flue, never connect any other appliances
to this flue. Doing so can result in excessive levels of
carbon monoxide which can cause severe personal
injury or death!
Never install a vent pipe having a diameter different than
that of the boiler/water heater flue collar. Failure to
comply with this warning can result in excessive levels
of carbon monoxide which can cause severe personal
injury or death.
Always provide a minimum clearance of 6 in, 152 mm between
single wall vent pipe and any combustible materials. Type B1 vent
may be used, clearance between it and any combustible material
must be as listed.
Failure to maintain minimum clearances between vent
connectors and any combustible material can result
in a fire causing extensive property damage, severe
personal injury or death!
Chimney Inspection & Sizing
A thorough inspection of the masonry chimney must be
performed to ensure that the chimney is clean, properly constructed,
lined and sized. Exterior masonry chimneys should not be used unless
properly lined to prevent condensation and draft problems. Table 5
lists the equivalent breeching and flue sizes required for the boiler/
water heater. When more than one appliance is connected to the same
chimney flue, the flue must be large enough to safely vent the
combined output of all of the appliances.
Table 5 Equivalent Breeching & Chimney Size (Category I)
Model Size
300 - 400 6 152
600 7 178
750 8 203
900 - 1050 10 254
1350 12 305
1500 - 2100 14 356
Note: These sizes are based on 20 ft, 6.1 m chimney height.
Pipe Diameter
in mm
Vent Connections
Locate the boiler/water heater as close to the chimney as possible.
Use the shortest, straightest vent connector possible for the
installation. If horizontal runs exceed 5 ft, 1.5 m they must be
supported at 3 ft, 0.9 m intervals with overhead hangers. Use a type
B, single wall stainless or single wall galvanized steel vent pipe the
same diameter as the flue collar to connect the boiler/water heater
to a masonry chimney. When using an approved metal chimney
system use the appropriate vent connector. The vent connector
should be sloped up toward the chimney at a minimum rate of
1/4 in/ft, 20 mm/m. On masonry chimneys the connector must
terminate flush with the inside of the chimney flue, Figure 2. Fasten
each single wall vent connection with at least 3 corrosion resistant
sheet metal screws.
DIRECT VENT, POSITIVE PRESSURE,
CATEGORY III
In this configuration the boiler/water heater blower is used to push
the flue products to the outdoors while drawing combustion air from
the outdoors. The equivalent length of the vent system must not
exceed 35 ft, 10.7 m. The Intake Air Option instructions under the
“COMBUSTION AIR & VENTILATION” section must
followed! The vent system flue pipe diameter must be sized per Table
5a.
Horizontal Direct Vent Systems - Figures 4 & 5
The vent materials used in horizontal vent systems must be certified
to UL 1738 for installations in the United States, ULS636 for
installations in Canada. The certified vent terminal from RBI must
also be used.
The maximum equivalent length for the horizontal vent and
combustion air pipes is 35 ft, 10.7 m for each. Each 90° elbow and
the vent and intake air terminals are equal to 10 ft, 3.1 m of straight
pipe. To maximize the performance of single wall sheet metal vent
systems locate 90° elbows as far from the boiler as possible and
from one another. For best results, horizontal vent systems should be
as straight as possible.
The vent system must be both gas tight and water tight. All seams and
joints in metal pipes must be joined and sealed in accordance with
the vent system manufacturer’s instructions.
When horizontal vent runs exceed 5 ft, 1.5 m they must be supported
at 3 ft, 0.9 m intervals with overhead hangers. The vent system must
be pitched down, toward the vent terminal, 1/4 in/ft, 21 mm/m. If
any part of a single wall metal vent system passes through an unheated
space it must be insulated with insulation rated for 400°F, 204°C.
be
10
Finned copper tube gas boilers & water heaters – Boiler Manual
Table 5a Category III Vent Pipe Diameter
Model Size
300 - 400 6 152
600 - 750 8 203
900 - 1050 10 254
1350 12 305
1500 - 2100 14 356
Note: Diameters based on a maximum 35 equivalent feet.
Pipe Diameter
in mm
Horizontal vent systems shall terminate at least 4 ft, 1.2 m below,
4 ft, 1.2 m horizontally from or 1 ft, 0.3 m above any door, window
or gravity air inlet into any building. It must not terminate less than
4 ft, 1.2 m horizontally from, and in no case above or below, unless
a 4 ft, 1.2 m horizontal distance is maintained, from electric meters,
gas meters, regulators and relief equipment and not less than 7 ft,
2.1 m from any adjacent public walkway. The bottom of the vent
terminal(s) shall be located at least 5 ft, 1.5 m above the air intake
terminal(s) unless there is a minimum 5 ft, 1.5 m horizontal
separation between them. Avoid terminal locations likely to be
affected by winds, snow drifts, people and pets. Protect building
materials and vegetation from degradation caused by the flue gases.
Vertical Direct Vent Systems - See Figure 6
The maximum length for the vertical vent and combustion air
pipes is 35 ft, 10.7 m plus two 90° elbows for each. If any part of a
single wall metal vent system passes through an unheated space it
must be insulated with insulation rated for 400°F, 204°C. Structual
penetrations must be made using approved fire-stops.
A listed, nonrestrictive vent cap must be used. The top of a vertical
vent system must extend at least 51/2 ft, 1.7 m above the roof
surface that it passes through, 4 ft, 1.2 m above the intake air cap,
see Figure 6.
When horizontal vent runs exceed 5 ft, 1.5 m they must be supported
at 3 ft, 0.9 m intervals with overhead hangers. The vent system must
be pitched down, toward the vent terminal, 1/4 in/ ft , 20 mm/m. If
any part of a single wall metal vent system passes through an unheated
space it must be insulated with insulation rated for 400°F, 204°C.
Horizontal vent systems shall terminate at least 4 ft, 1.2 m below,
4 ft, 1.2 m horizontally from or 1 ft, 0.3 m above any door, window
or gravity air inlet into any building. It must not terminate less than
4 ft, 1.2 m horizontally from, and in no case above or below, unless
a 4 ft, 1.2 m horizontal distance is maintained, from electric meters,
gas meters, regulators and relief equipment and not less than 7 ft,
2.1 m from any adjacent public walkway. The bottom of the vent
terminal(s) shall be located at least 5 ft, 1.5 m above the air intake
terminal(s) unless there is a minimum 5 ft, 1.5 m, horizontal
separation between them. Avoid terminal locations likely to be
affected by winds, snowdrifts, people and pets. Protect building
materials and vegatation from degradation caused by the flue gases.
To determine the appropriate power venter for the boiler/water
heater, see Table 6, Power Venter Sizes. Follow the power venter
manufacturer’s installation instructions.
Table 6 Power Venter Sizes
Dominator Power Venter
Model Model
300 HS-1 30* 9
400 HS-2 100 31
600 HS-2 67** 21
750-900 HS-3 100 31
1050-1350 HS-4 100 31
1500-2100 HS-5 100 31
*Choose HS-2 100 ft, 31 m, Max. Pipe Length.
**Choose HS-3 for 100 ft, 31 m, Max. Pipe Length.
Max. Pipe Length
ft mm
HORIZONTAL VENT, NEGATIVE PRESSURE,
CATEGORY I
In this configuration a wall-mounted power venter must be used
to pull the flue products horizontally from the unit and vent them
to the outdoors, see Figures 3, 4 & 5. The air for combustion is taken
from the space in which the unit is installed, or from the outdoors.
The applicable instructions under the “COMBUSTION AIR &
VENTILATION” section must be followed!
To maximize the performace of single wall sheet metal vent systems
locate 90° elbows as far from the boiler as possible and from one
another. For best results, horizontal vent systems should be as short
and straight as possible.
OUTDOOR VENTING
When installed outdoors the Dominator must be fitted with the
factory supplied outdoor vent hood and air intake hood, see Figure
8. Multiple units must be spaced per Figure 9.
The boiler/water heater must be at least 10 ft, 3.0 m from any door,
window or gravity air inlet into any building and at least 3 ft, 0.9 m
from any overhang unless local codes dictate differently.
Avoid locations where wind deflection off of adjacent walls, buildings
or shrubbery might cause a down draft. The unit(s) should be
located at least 3 ft, 0.9 m from structures. Outdoor installations
are not recommended in areas where the danger of snow blockage
exists.
Do not place the boiler/water heater in a location that
would subject it to runo from adjacent buildings or
damage may occur voiding the warranty!
11
Finned copper tube gas boilers & water heaters – Boiler Manual
Figure 8 Outdoor Venting
Figure 9 Multiple outdoor Units
COMMON VENT SYSTEMS
If an existing boiler/water heater is removed from a common venting
system, the common venting system may then be too large for the
proper venting of the remaining appliances connected to it. At the
time of removal of an existing boiler/water heater, the following
steps shall be followed with each appliance remaining connected
to the common venting system placed in operation, while the other
appliances remaining connected to the common venting system
are not in operation.
Au moment du retrait d'une chaudière existante, les mesures suivantes
doivent être prises pour chaque appareil toujours raccordé au système
d'évacuation commun et qui fonctionne alors que d'autres appareils
toujours raccordés au système d'évacuation ne fonction-nent pas:
système d'évacuation
a) Seal any unused openings in the common venting system.
Sceller toutes les ouvertures non utilisées du système d'évacuation.
b) Visually inspect the venting system for proper size and horizontal
pitch and determine there is no blockage or restriction, leakage,
corrosion and other deciencies which could cause an unsafe
condition.
Inspecter de façon visuelle le système d'évacu-ation pour
déterminer la grosser et l'inclinaison horizontale qui conv iennent
et s'assurer que le système est exempt d'obstruction, d'étranglement
de fruite, de corrosion et autres défaillances qui pourraient
présenter des risques.
c) Insofar as is practical, close all building doors and windows and
all doors between the space in which the appliances remaining
connected to the common venting system are located and other
spaces of the building. Turn on clothes dryers and any appliance
not connected to the common venting system. Turn on any
exhaust fans, such as range hoods and bathroom exhaust, so
they will operate at maximum speed. Do not operate a summer
exhaust fan for a boiler installation. Close replace dampers.
Dans la mesure du possible, fermer toutes les portes et les fenêtres
du bâtiment et toutes les portes entre l'espace où les appareils
toujours raccordés du système d'évacuation sont installés et les
autres espaces du bâtiment. Mere en marche les sécheuses, tous
les appareils non raccordés au système d'évacuation commun et
tous les ventilateurs d'extraction comme les hoes de cuisinère
et les ventilateurs des salles de bain. S'assurer que ces ventilateurs
fonctionnent à la vitesse maximale. Ne pas faire fonctionner les
ventilateurs d'été. Fermer les registres des cheminées.
d) Place in operation the appliance being inspected. Follow the
lighting instructions. Adjust thermostat so appliance will operate
continuously.
Mere l'appareil inspecté en marche. Suivre les instructions
d'allumage. Régler le thermostat de façon que l'appareil fonctionne
de façon continue.
12
Finned copper tube gas boilers & water heaters – Boiler Manual
e) Test for spillage at the dra hood relief opening aer 5 minutes
of main burner operation. Use the ame of a match or candle,
or smoke from a cigaree, cigar or pipe.
Faire fonctionner le brûleur principal pendant 5 min ensuite,
déterminer si le coupe-tirage déborde à l'ouverture de décharge.
Utiliser la amme d'une allunee ou d'une chandelle ou la fumée
d'une cigaree, d'un cigare ou d'une pipe.
f) Aer it has been determined that each appliance remaining
connected to the common venting system properly vents when
tested as outlined above, return doors, windows, exhaust fans,
replace dampers and any other gas-burning appliance to their
previous condition of use.
Une fois qu'il a été déterminé, selon la métode indiquée cidessus,
que chaque appareil raccordé au système d'évacuation est mis à
l'air libre de façor adéquate. Remere les portes et les fenêtres, les
ventilateurs, les registres de cheminées et les appareils au gaz à
leur position originale.
g) Any improper operation of the common venting system should
be corrected so the installation conforms with the National Fuel
Gas Code, ANSI Z223.1/NFPA 54. When resizing any portion
of the common venting system, the common venting system
should be resized to approach the minimum size as determined
using the appropriate tables in Appendix F in the National Fuel
Gas Code, ANSI Z223.1/NFPA 54 and or CAN/CGA-B149
Installation Codes.
Tout mauvais fonctionnement du systéme d'évacu-tion commun
devrait étré corrigé de façor que l'installation soit conforme au
National Fue Gas Code, ANSI Z223.1/NFPA 54 et (ou) aux
codes d'installation CSA-B149. Si la grosseur d'une section
du système d'évacuation doit étré modiée, le système devrait
étré modié pour respecter les valeurs minimales des tableaux
pertinents de l'appendice F du National Fuel Gas Code, ANSI
Z223.1/NFPA 54 et (ou) des codes d'installation CAN/
CGA-B149.
GENERAL PIPING REQUIREMENTS
Improper piping of this boiler/water heater will void
the manufacturer's warranty and can cause boiler failure
resulting in ooding and extensive property damage!
Excessive water hardness causing scaling in the copper
heat exchanger tubes is NOT covered under the
manufacturer's warranty. Excessive piing and erosion
of the internal surface of the copper heat exchanger
tubes is NOT covered under the manufacturer's
warranty if the result of high water ow rates, see Table
7. Return water temperatures below 125°F, 52°C will
result in heat exchanger damage from excessive
condensation voiding the manufacturer's warranty, see
Primary/Secondary Piping Figure 11.
Shut o valves and unions should be installed at the
inlet and outlet connections of the boiler/water heater
to provide for isolation of the unit should servicing
be necessary.
Freeze Protection
is boiler/water heater is CSA designed certied for outdoor
installation. Outdoor installations in areas where the danger of
freezing exists are not recommended unless proper freeze protection
is provided. If the unit is to be installed in such an area the following
precautions MUST be observed:
1. A continuous ow of water through the boiler/water heater
MUST be maintained! e pump respon-sible for ow through
the boiler/water heater must run continuously!
2. An ethylene glycol/water mixture suitable for the minimum
temperature that the unit will be exposed to must be used. e
pump must be capable of producing a minimum of 15% more
ow and overcoming a 20% increase in head loss. Domestic
water systems must be isolated from the water heater by the
use of a heat exchanger or other approved method.
3. If the boiler/water heater must be shut o for any reason the
electric, gas and water supplies MUST be shut o and the unit
and its pump completely drained.
Improper outdoor installation of this boiler/water heater
can cause boiler failure voiding the manufacturer's
warranty!
13
Finned copper tube gas boilers & water heaters – Boiler Manual
Relief Valve
rise or consult manufacturer. Cupro-nickel heat exchanger should be
Pipe the discharge of the pressure relief valve to prevent scalding in
the event of a discharge, see Figure 10. e discharge piping must be
sized the same as the pressure relief valve outlet and installed to allow
complete drainage of both the relief valve and the discharge piping.
Figure 10 Relief Valve Piping
Never install any type of valve between the boiler/
water heater and the relief valve or an explosion causing
extensive property damage, severe personal injury or
death may occur!
Flow Switch
e ow switch supplied with the boiler/water heater must be wired
to the terminal strip in the control panel to prevent the boiler from
ring unless there’s adequate water ow through the unit. e ow
switch must be installed in the supply piping adjacent to the boiler
outlet connection.
Failure to properly install the ow switch may result
in damage to the boiler/water heater heat exchanger
voiding the warranty!
Table 7 Temperature Rise Table
∆T = 15°F ∆T = 8.3°C
Model Flow Rate Pres. Drop Flow Rate Pres. Drop
Number GPM Ft L/s kPa
300 33.4 0.21 2.1 0.6
400 45.4 0.49 2.9 1.5
600 68.1 1.30 4.3 3.8
750 85.1 2.35 5.4 6.9
900 102.1 3.84 6.4 11.3
1050 119.1* 6.23 7.5 18.4
∆T = 20°F ∆T = 11.1°C
Model Flow Rate Pres. Drop Flow Rate Pres. Drop
Number GPM Ft L/s kPa
300 25.1 0.12 1.6 0.4
400 34.0 0.29 2.1 0.9
600 51.1 0.76 3.2 2.3
750 63.8 1.38 4.0 4.1
900 76.6 2.25 4.8 6.6
1050 89.4 3.66 5.6 10.8
1350 114.9* 7.17 7.2 21.1
∆T = 25°F ∆T = 13.9°C
Model Flow Rate Pres. Drop Flow Rate Pres. Drop
Number GPM Ft L/s kPa
300 20.0 0.08 1.3 0.2
400 27.2 0.19 1.7 0.6
600 40.8 0.51 2.6 1.5
750 51.0 0.91 3.2 2.7
900 61.3 1.49 3.9 4.4
1050 71.5 2.42 4.5 7.1
1350 91.9 4.74 5.8 14.0
1500 102.1 6.31 6.4 18.6
∆T = 30°F ∆T = 16.7°C
Model Flow Rate Pres. Drop Flow Rate Pres. Drop
Number GPM Ft L/s kPa
600 34.0 0.36 2.1 1.1
750 42.6 0.65 2.7 1.9
900 51.1 1.06 3.2 3.1
1050 59.6 1.73 3.8 5.1
1350 76.6 3.38 4.8 10.0
1500 85.1 4.50 5.4 13.3
1950 110.6* 9.20 7.0 27.1
2100 119.1* 11.27 7.5 33.2
∆T = 35°F ∆T = 19.4°C
Model Flow Rate Pres. Drop Flow Rate Pres. Drop
Number GPM Ft L/s kPa
750 36.5 0.49 2.3 1.4
900 43.8 0.80 2.8 2.4
1050 51.1 1.30 3.2 3.8
1350 65.6 2.54 4.1 7.5
1500 72.9 3.38 4.6 10.0
1950 94.8 6.91 6.0 20.4
2100 102.1 8.47 6.4 25.0
14
Finned copper tube gas boilers & water heaters – Boiler Manual
HEATING SYSTEM PIPING
General Piping Requirements
All heating system piping must be installed by a qualied technician
in accordance with the latest revision of the ANSI/ASME Boiler
and Pressure Vessel Code, Section IV, and, when required, ANSI/
ASME CSD-1, Standard for Controls and Safety Devices for
Automatically Fired Boilers. All applicable local codes and ordinances
must also be followed. A minimum clearance of 1 in, 25 mm must
be maintained between heating system pipes and all combustible
construction. All heating system piping must be supported by suitable
hangers not the boiler.
e thermal expansion of the system must be considered when
supporting the system. A minimum system pressure of 12 psig,
82.7 kPa must be maintained.
Heating Boiler Piping Connections
e supply and return piping should be sized to suit the system. e
supply and return connection sizes are listed in Table 8.
Table 8 Supply & Return Connection Sizes
Model Size Supply Size Return Size
300 thru 2100 2 1/2” NPT 2 1/2” NPT
Expansion Tank & Air Separator
An expansion tank or other means to control thermal expansion
must be installed in the heating system. An expansion tank must
be installed close to the boiler on the suction side of the pump. An
air scoop and automatic air vent must also be installed to eliminate
air trapped in the system.
Primary/Secondary Piping
Boilers connected to heating systems using zone valves, zone pumps,
or systems that have excessive ow rates or return water temperatures
less than 125°F, 52°C must be isolated from these systems to protect
the boiler.
Variable Water Flows
Figure 11 shows a typical primary/secondary piping system. A
dedicated pump is used to maintain a constant water ow through
the boiler. is secondary pump is sized to overcome the head loss
of the boiler and secondary piping system while supplying the ow
rate required to maintain the desired temperature rise across the
boiler. e primary pump is sized to provide the required ow to
the heating system. e secondary piping connections to the primary
system piping must not be more than 6 pipe diameters apart to
ensure zero pressure drop in the primary system, see Figure 11.
Pump Requirements
is low mass boiler requires a continuous minimum water ow
for proper operation. e system pump must be sized to overcome
the head loss of the boiler and the heating system in order to achieve
the required temperature rise. Table 7 provides the heat exchanger
pressure drop and temperature rise gures. e temperature rise
across the boiler must never exceed 35°F, 19.4°C.
A temperature rise outside of the range listed in
Table 7 indicates that the ow rate through the
heat exchanger is incorrect which will damage the
heat exchanger voiding the warranty! e maximum
allowable temperature rise is 35°F, 19.4°C.
e maximum allowable ow rate through a Dominator
boiler with copper heat exchanger is 105 GPM, 6.6 L/s.
e cupro-nickel heat exchanger allows for 120 GPM,
7.6 L/s.
An adjustable pump delay is available as a feature of the staging
controller. e pump delay establishes water ow through the boiler
and heating system before the appliance starts. Consult the staging
controller manual for further details.
Low Water Cuto
If a boiler is installed above any radiation elements it must be ed
with a low water cuto device.
Refer to wiring diagram supplied with the boiler/water heater for
proper wiring connections.
Low Return Water Temperatures
To prevent the problems associated w ith condensation of the products
of combustion due to low return water temperatures a primary/
secondary piping system with a bypass and bypass valve must be
installed, see Figure 12 and 12A. e bypass and bypass valve must
be sized the same as the secondary piping. A balancing valve must
also be installed in the supply side of the secondary piping downstream
of the bypass. e balancing valve should be adjusted to divert some
of the heated discharge water into the return water until the required
inlet water temperature is achieved. e primary and secondary
pumps should be sized to provide the required ow through each
system. e secondary piping connections to the primary system
piping must not be more than 6 pipe diameters apart to ensure zero
pressure drop in the primary system, see Figure 12 and 12A.
Multiple Boiler Systems
Systems using multiple boilers can also be installed using a primary/
secondary manifold system, Figure 13.
Piping For Use With Cooling Units
e boiler, when used in connection with a refrigeration system,
must be installed so the chilled medium is piped in parallel with
the boiler. Appropriate valves must be used to prevent the chilled
water from entering the boiler.
When a boiler is connected to a heating coil that may be exposed
to refrigerated air from an air handling device, the piping system
must be equipped with ow-control valves or some other automatic
means of preventing gravity circulation of the boiler water during
the cooling cycle.
15
Finned copper tube gas boilers & water heaters – Boiler Manual
Figure 11 Typical Primary/Secondary Piping
(See Notes)
NOTES:
1. Boiler circuit piping must be sized
large enough to handle maximum
ow through unit.
2. Boiler pump sized to boiler design
ow requirements.
3. All boilers furnished with factory
mounted outlet water temperature
gauge.
4. Boiler pump purging required.
Use terminals supplied.
Notice: These drawings show suggested piping conguration and valving.
Check with local codes and ordinances for
specic requirements.
Figure 12 Low Temperature Piping with Thermostatic Valve
(See Notes)
H-1 Rev 4
Pump
Gate Valve
Globe Valve
Angle Valve
Bufferfly Valve
Balance Valve
Ball Valve
Motorized Valve
Solenoid
Operated Valve
Self-Operated
Valv e
Pressure
Reducing Valve
Check Valve
H-18 Rev 3
NOTES:
1. For pump selection consult factory.
2. Boiler pump sized to boiler and thermostatic 3-way valve design ow
requirements.
3. Boiler circuit piping must be sized large enough to handle maximum ow
through unit.
4. All boilers furnished with factory mounted outlet water temperature gauge.
5. Boiler pump purging required. Use terminals supplied.
6. Valve is precalibrated for 140°F return temperature.
Notice: These drawings show suggested piping conguration and valving. Check
with local codes and ordinances for specic requirements.
16
Pressure
Relief Valve
Flow Switch
Thermometer
Aquastat Union
Pressure Switch
Gas Pressure
Regulator
Automatic
Air Vent
BackflowPrevention
Device
3-Way Valve
Expansion
Tank
Finned copper tube gas boilers & water heaters – Boiler Manual
Figure 12A Low Temperature Piping
(See Notes and Adjustment Procedures)
Pu m p
G a te Val v e
G l obe Val v e
Adjustment Procedure
To Maintain Inlet Temperature
Above Dew Point
T1-Temp-Min=110°F For Atmospheric
T1-Temp-Min=125°F Sealed Combusion
1. Turn heater on and open valves A & B.
2. After steady-state operation, if T1 is less
than Temp-Min slowly close valve B until
T1 climbs to desired operating temperature
above Temp-Min.
3. If T1 is greater than desired operating
temperature, slowly close valve A to adjust to
lower desired temperature above Temp-Min.
4. Check after system operating temperature
has stabilized. Make nal adjustments.
5. Follow same adjustment procedure for
sealed combustion.
Figure 13 Multiple Boiler Piping
(See Notes)
NOTES:
1. Boiler circuit piping must be
sized large enough to handle
maximum ow through unit.
2. Boiler pump sized to boiler
design ow requirements.
3. All boilers furnished with
factory mounted outlet
water temperature gauge.
4. Boiler pump purging required.
Use terminals supplied.
Notice: These drawings show
suggested piping conguration
and valving.Check with local
codes and ordinances for
specic requirements.
H-3 Rev 6
A ngl e Val v e
B u ffe r f l y Va l v e
B a l ance Va l v e
B a ll V a lv e
Moto r i z ed Val v e
S o l e noi d
O per ate d Va l v e
S e l f -Operated
Va l v e
Pr e s s u r e
Reduc i ng Val v e
Check Val v e
Pr e s s u r e
Reli e f Va l v e
Fl o w Swi t ch
The r momet e r
NOTES:
1. Boiler circuit piping must be large enough to handle
maximum ow through unit.
2. Boiler pump sized to boiler design ow requirements.
3. All boilers furnished with factory mounted outlet water
temperature gauge.
4. Boiler pump purging required. Use terminals supplied.
5. Secondary loop pipe diameter must be sized large enough to
handle maximum ow through all units.
Notice: These drawings show suggested piping conguration and valving.
Check with local codes and ordinances for specic requirements.
H-15 Rev 5
A quasta t U n i o n
P r es sure S w i t ch
G a s Pressur e
Reg u lator
A u tomati c
A i r Vent
BackflowPrevention
Device
Expansion
Tank
17
Finned copper tube gas boilers & water heaters – Boiler Manual
DOMESTIC WATER SUPPLY PIPING
Proper control seings must be used to prevent water
supplied for domestic use from exceeding 130°F, 54°C
or a scald injury will occur! When higher water
temperatures are required for appliances such as a
dishwasher, a mixing valve or some other tempering
means must be installed. Households with small
children may require water temperatures less than
120°F, 49°C. Local codes must be complied with!
To properly size the pump a grain hardness and pH test must be taken
at the installation site before the order is placed. Proper pump sizing
will improve heater performance and help ensure heater longevity.
Expansion Tank
An expansion tank or other means to control thermal expansion
must be installed in the water heating system if back ow prevention devices are installed.
General Piping Requirements
Ensure that the water heater is equipped with bronze headers. Piping
and components connected to the water heater must be suitable for use
with potable water. e water heater must not be connected to any
heating system piping or components previously used with a nonpotable water heating appliance. No toxic chemicals, such as those used
for boiler treatment, are to be introduced into the potable water used
for space heating. If a hot water storage tank is used in the system it must
be equipped with a temperature and pressure relief valve that complies
with ANSI Z21.22 or CAN-4.4 and CAN-4.6.
e storage tank must be located as close to the water
heater as possible to prevent excessive head loss which
will reduce ow.
Water Chemistry
e required temperature rise across the water heater is based on
water having a hardness between 8 and 18 grains per gallon with a
level of dissolved solids not exceeding 350 ppm. Water having a
hardness less than 8 grains can cause excessive errosion of the heat
exchanger. Water that has a hardness greater than 18 grains per gallon
and/or a level of dissolved solids exceeding 350 ppm will require a
recalculation of the pump size and temperature rise.
A cupro-nickel heat exchanger may also be required. e manufacturer
should be consulted when these water conditions are encountered.
See Table 8A.
e maximum allowable ow rate through a Dominator
water heater with copper heat exchanger is 105 GPM,
6.6 L/s. e cupro-nickel heat exchanger allows for
120 GPM, 7.6 L/s, see Table 8B.
RBI water heaters are designed to run scale free. Due to the extreme
variables of water conditions world wide it is necessary to consider
pH values and water hardness in relationship to scaling. It is crucial
to consider these two variables when making heat exchanger and
pump selection. If local water conditions are extreme follow the
guidelines in the Heat Exchanger Selection Table (Table 8A) and the
Pumping Performance Table (Table 8B). Scale free operation can be
achieved by using water with a hardness between 8 and 18 and by
maintaining the pH between 5 and 9. Follow the conditions listed
under NORMAL in the table. In some areas of the country additional
precautions must be observed due to unusual characteristics of the
local water supply. Call the nearest RBI representative for details.
18
Cold Water Supply
e cold water supply must be piped to the water heater's outlet piping
between the water heater and the hot water storage tank. is will
prevent untempered water from entering the water heater, see the
Temperature Rise Control section below. A typical water heating
system is shown in Figure 14 and 15.
Pump Requirements
is low-mass water heater requires a continuous mini-mum water
ow for proper operation. e low water ow switch provided for this
unit will shut down the water heater if ow falls below the required
minimum level. Table 8B provides the heat exchanger pressure drop
chart and temperature rise table. e temperature rise across
the water heater must never exceed 35°F, 19°C.
Temperature Rise Control
Water returned to the water heater inlet must not be less than 125°F,
52°C or excessive condensation of the products of combustion will
damage the water heater voiding the warranty. e method outlined
below can be employed to prevent this condition from occurring.
A balancing valve should be installed on the outlet side of the water
heater for purposes of adjusting the ow rate through the heat
exchanger. ermometers are installed on both the inlet and outlet
of the water heater for determining the temperature rise through the
unit. e proper velocity through the water heater must be maintained
in accordance with Table 8B for ecient operation and long life. If
the temperature rise through the water heater is lower than
recommended the water velocity is too high. Premature erosion of
the heat exchanger will occur. Conversely, if the temperature rise is
higher than recommended in Table 8B the ow rate is too low. Scaling
and soening of the heat exchanger will occur.
Thermostatic Mixing Valve -
Water Above 140°F, 60°C
Water can be stored at temperatures above 140°F, 60°C provided
that a thermostatically controlled mixing valve is used to temper
the hot water to an acceptable temperature before it's supplied for
domestic use.
e mixing valve MUST be set to prevent a scald injury from
occurring, see the caution against scalding above.
Storage of water for domestic use above 140°F, 60°C will provide
an increased quantity of tempered water and help prevent the growth
of water born bacteria.
Finned copper tube gas boilers & water heaters – Boiler Manual
Table 8A Dominator Heat Exchanger Selection Graph
Table 8B Dominator Pumping Performance Requirement
19
Finned copper tube gas boilers & water heaters – Boiler Manual
e
Operated Valve
Pressure Switch
Reducing Valve
Self-Operated
Check Valve
Pressure
Valve
Pump
Motorized Valve
Solenoid
Ball Valve
Bufferfly Valve
Angle Valve
Valve
Globe Valve
Balance Valve
Temperatu
(Typ.)
Figure 14 Typical Water Heating Piping (DW Models only)
(See Notes)
3
8
2
1
4
7
D-1 Rev 6
Pump
Valve
Globe Valve
Angle Valve
Bufferfly Valve
Pressure
Relief Valve
Flow Switch
Thermometer
Aquastat Union
Not all RBI stock storage tanks
Attention:
incorporate this tapping: See Note 1.
Figure 15 Multiple Water Heating Piping (DW Models only)
(See Notes)
SELF BALANCING DOUBLE REVERSE
RETURN MAKE-UP & SUPPLY, CIRCULATION
4
3
6
1
7
2
8
7
2
6
Balance Valve
Ball Valve
Motorized Valv
Solenoid
Operated Valve
Self-Operated
Valve
4
Pressure
Reducing Valve
Check Valve
Gas Pressure
Regulator
Automatic
Air Vent
re &
Pressure
Relief Valve
Vacuum
Relief Valve
Drain Valve
D-4 Rev 6
Not all RBI stock storage tanks
incorporate this tapping: See Note 1.
NOTES:
1. Optional cold water make up and recirculation line location.
2. When using intermittent pump and pump delay, locate remote aquastat
well in lower 1/3 of tank. Install aquastat with heat sensing compound.
3. Thermal expansion tank may be required, check local codes.
4. When using optional factory mounted pump, max pipe length 30’ total, 6-90° elbows, full pipe size.
5. CAUTION: MEASURE WATER HARDNESS AND pH AT JOB SITE.
The pH and water hardness must be measured before selecting heat exchanger and pump.
Consult the Heat Exchanger Graph and Pumping Performance Table before making selection.
6. Common piping must be sized for maximum combined heater ow.
7. Hot water tanks should be equipped with a combination temperature & pressure relief valve.
8. MA Code requires an 1/8” hole in check valve to compensate for thermal expansion.
Notice: These drawings show suggested piping conguration and valving.
Check with local codes and ordinances for specic requirements.
20
Attention:
Finned copper tube gas boilers & water heaters – Boiler Manual
GAS SUPPLY PIPING
Check the boiler/water heater rating plate to make sure
that the boiler/water heater is for the type of gas that will
be used. If it isn’t, do not connect the boiler/water heater
to the gas supply. Gas supply piping must be in
accordance with the National Fuel Code, ANSI Z223.1latest revision or applicable provisions of the local
building codes. Canadian installations must comply
with CAN/CGA B149.1 or .2 Installation Code. Failure
to comply with this warning can result in extensive
property damage, severe personal injury or death!
e Dominator comes from the factory ready to be piped to the
gas supply. If for any reason the boiler/water heater is not for the
type of gas available at the installation site, call your RBI representative
to resolve the problem.
A minimum gas supply pressure of 6 in, 152 mm
WC natural or 11 in, 279 mm WC propane and
maximum 14 in, 356 mm WC natural or propane,
must be available at the safety shuto valve inlet with
the unit(s) operating.
Table 9 should be used to ensure that the gas supply piping is sized
properly. If more than one appliance is supplied by the same supply
pipe, the piping must be sized based on the maximum possible
demand. Do not neglect the pressure drop due to pipe ings. Table
9 should be used in conjunction with Table 10 to ensure that the gas
supply piping has the capacity to meet the demand.
Figure 16 depicts the proper way to connect the boiler/ water heater
to the gas supply piping. e manual shut-o valve must be installed
in the supply piping. It should be installed 5 , 1.5 m above the oor
where required by local codes. Provide a sediment trap at the boom
of the vertical section of the gas supply pipe upstream of the gas
controls.
A ground joint union should be installed between the boiler gas
controls and the supply piping. Each of these items are needed to
ensure long life and ease of servicing. Always use a pipe sealant that
is suitable for use with LP gas.
Table 9 Gas Pipe Capacity
Maximum pipe capacity in ft3/hr based on 0.60 specic gravity gas
at a pressure of 0.5 psig or less and a 0.3" WC pressure drop.
Nominal
Iron Pipe
Size
1" 520 350 285 245 215 195 170 150 120
1 1/4" 1050 730 590 500 440 400 350 305 250
1 1/2" 1600 1100 890 760 670 610 530 460 380
2" 3050 2100 1650 1450 1270 1150 990 870 710
2 1/2" 4800 3300 2700 2300 2000 1850 1600 1400 1130
3" 8500 5900 4700 4100 3600 3250 2800 2500 2000
Note: Multiply the gas volume by 0.62 for propane ow capacity in ft
Multiply the propane ow capacity by 2500 Btu/ft
the propane Btu/hr capacity for a given pipe size and length.
10 20 30 40 50 60 80 100 150
Maximum gas volume of pipe, (ft
Pipe length in feet
3
to determine
3
/hr)
3
/hr.
Table 10 Equivalent Pipe Length Chart
Nominal
Iron Pipe
Size
1" 2.6 5.2 0.6 1.5
1 1/4" 3.5 6.9 0.8 1.9
1 1/2" 4.0 8.0 0.9 2.3
2" 5.2 10.3 1.2 3.0
2 1/2" 6.2 12.3 1.4 3.7
3" 7.7 15.3 1.8 4.5
Notes: 1. For ow through branch.
2. For ow at full open.
90˚ Elbow Tee
Type of pipe tting
1
Gate Valve2Gas Cock
Equivalent pipe length, (ft)
2
Always use a square jawed wrench on the gas valve
body when making gas connections to it. Never overtighten the piping entering the gas valve body or gas
valve failure may result!
Figure 16 Gas Supply Piping
When applicable, provisions for vent, bleed and gas relief lines must
be made in accordance with the latest revision of ANSI Z223.1/
NFPA 54.
Safe lighting and other performance criteria were met with the gas
manifold and control assembly provided on the boiler. All gas
connections MUST be leak tested before puing the boiler into
operation.
Never use an open ame to test for gas leaks. Always
use an approved leak detection method. Failure to
comply with this warning can cause extensive property
damage, severe personal injury or death!
Whenever the gas supply piping is pressure tested the boiler/water
heater gas controls must be protected. If the test pressure is equal to,
or less than 1/2 psig, 3.5 kPa isolate the boiler/water heater by
closing it's manual shut o valve, see Figure 16. If the test pressure is
greater than, or equal to 1/2 psig, 3.5 kPa, disconnect the boiler/
water heater and its individual shut-o valve.
21
Finned copper tube gas boilers & water heaters – Boiler Manual
ELECTRICAL WIRING
Electrical Power Connections
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation! Verify proper operation aer
servicing.
GENERAL OPERATION
Before proceeding read and fully understand the
instructions contained in this manual. Do not aempt
to operate this boiler/water heater if it has not been
installed in accordance with the guidelines set forth in
this manual. Failure to comply with this warning can
result in extensive property damage, severe personal
injury or death!
AENTION. Au moment de l'entretien des com-
mandes, étiquetez tous les ls avant de les débrancher.
Des erreurs de câblage peuvent entraîner un fonctionnement inadéquat et dangereux. S'assurer que
l'appareil fonctionne adéquatement une fois l'entretirn
terminé.
e electrical connections to this boiler/water heater must be made
in accordance with all applicable local codes and the latest revision
of the National Electrical Code, ANSI /NFPA-70. Installation should
also conform with CSA C22.1 Canadian Electrical Code Part I if
installed in Canada.
Install a separate 120 volt 15 amp or 20 amp circuit breaker for the
boiler/water heater and pump, see Table 11. A properly rated shuto switch should be located at the boiler/water heater. e boiler/
water heater must be grounded in accordance with the authority
having jurisdiction, or if none, the latest revision of the National
Electrical Code, ANSI/NFPA-70.
Table 11 Dominator Electrical Requirements
Recommended
Dominator Circuit Breaker *Running
Model (Amps) Amps
DB/DW 300 - 600 15 3.9
DB/DW 750 - 900 15 6.0
DB/DW 1050 - 2100 20 11.4
*Use separate circuit breaker that is properly sized for pump and
pump contactor.
Line voltage eld wiring of any controls or other devices must
conform to the temperature limitation of type T wire at 95°F, 35°C
above room temperature. Use copper conductors with a minimum
size of #14 awg. Use appropriate wiring materials for units installed
outdoors. e wire size must be compatible with the total amp draw
of the circuit.
Refer to the wiring diagram supplied with the boiler/water heater
for proper wiring connections.
Should overheating occur or the gas supply fail to shut o, turn o
the manual gas control valve to the appliance. Do not interr upt water
ow through the boiler/water heater.
En cas de surchaue ou si l'alimentation en gaz ne s'arrête pas, fermez
manuellement le robinet d'arrêt de l'admission de gaz.
Hydronic Heating Boilers
Open the make-up water valve and slowly ll the boiler and all
of the radiation with water. Ensure that all bleed and drain valves
are closed.
Adjust the make-up water pressure regulator so a minimum
12 psig, 82.7 kPa system pressure is maintained at the highest
point in the system piping. If a make-up water pump is used adjust
it to maintain a minimum 12 psig, 82.7 kPa system pressure.
Open the system bleed and drain valves, one at a time, to purge
the air trapped in the heating system piping.
With the boiler o, run the system pump for at least 30 minutes
and bleed the system piping using the bleed valves. If strainers are
used in the system piping, the make-up water valve should be closed
and the strainers checked and cleaned.
e system expansion tank should be checked to ensure that the
correct water level in the tank is maintained. e tank should be
less than half full of water with the system full and adjusted to the
correct operating pressure.
Start the boiler as described in the “OPETING INSTRUCTIONS”.
Run the boiler for at least an hour. e system pump(s) and all
radiation units must be operated during this time. Ensure that the
make-up water valve is open.
Shut the boiler o and open the bleed valves to purge the air trapped
in the heating system piping. Close the make-up water valve and
check and clean the strainers and make-up water pressure reducing
valve.
Open the make-up water valve and adjust the system pressure if
necessary. e system should be checked and bled aer three days
of operation.
22
Finned copper tube gas boilers & water heaters – Boiler Manual
BOILER/WATER HEATER OPERATION
Staging Operation
e Dominator boiler/water heater series is separated into on/o,
2-stage and 4-stage units depending on the model size. e 300 is
on/o only. e 400 through 900 models have two ring inputs. e
1050 through 2100 have four. Input staging is controlled from the
staging controller that signals the relay board to select the blower and
gas valve modes. Table 12 identies the stages and ring modes
associated with the on/o (D300), 2-stage units (D400-D900), and
Table 13 identies the stages and ring modes associated with the
4-stage units (D1050-D2100).
Table 12 Firing Modes (D400-D900) – D300 On/Off Only
Stage Firing Mode
O O
1 Low Fire
2 High Fire
Table 13 Firing Modes (D1050-D2100)
Stage Left Firing Mode Right Firing Mode
O O O
1 Low Fire O
2 Low Fire Low Fire
3 High Fire Low Fire
4 High Fire High Fire
1- The left main valve will operate at low re, but left and right
blowers will be on and operating at low re (low speed).
e outlet water temperature is automatically controlled by the
staging controller. It utilizes inputs from the inlet and outlet water
temperature sensors, plus optional tank and outside sensors, to stage
the boiler/water heater. e Dominator will stage up or down
progressively, but w ill not jump over a stage. Stage 1 will operate rst,
last and whenever the boiler/water heater is in operation. Consult
the staging controller documentation for further information on
controller operation.
For the D1050-D2100, the air inlet plenum is divided into
le and right sides. A separate blower, main gas valve and manifold
are used for each side. However, the combustion chamber is
undivided. For best overall performance, gas and airows should be
balanced so that when both sides are at low or high re, stage 2 or 4,
the gas and airows are equal.
Pressure Switch Settings
Dierential pressure switches are provided in the Dominator to shut
down gas ow under a blocked ue or inlet condition. One high re
pressure switch is used for the 300 and one low re and one high re
pressure switch are used for the 400 through 900 models. Two low
re and two high re pressure switches are used for the 1050 through
2100 models. e low re pressure switches serve to shut down gas
ow if there is a blocked ue or inlet condition during low re
operation. Similarly, the high re switches will shut down gas ow if
there is a blocked ue or inlet condition during high re operation.
e dierential pressure is taken between the air plenum
and the pressure inside one of the main burners.
1
Pressure taps are provided in the control compartment for taking
the dierential pressure readings, Figure 17. Table 14 lists the
dierential pressure seings for all of the models.
Figure 17 Pressure Switch Tap(s)
Table 14 Differential Pressure Settings (All Units)
Dierential Pressure
Requirement at High Fire
Model
Inches WC mm WC
300-900 1.0 ± 0.1 20.3 ± 2.5
1050-2100 1.0 ± 0.1 25.4 ± 2.5
(All Units)
On the 4-stage units, the le low re and high re switches
will interrupt power to the control module under a blocked ue or
inlet condition. is will cause the pilot and le and right main gas
valves to close. e right switches will only shut down the right main
gas valve under a blocked ue or inlet condition. e relay board
automatically selects between pressure switches as the boiler/water
heater changes stages. Tables 15 and 16 identify how pressure switch
control changes during boiler/water heater staging. Tables 17 and 18
identify the control actions if a low air condition occurs at any stage.
For example, when operating at stage 2, the le and right low re
pressure switches monitor the boiler/water heater, since the blowers
are operating at low speed. When the unit stages to stage 3 the le
blower will be switched to high speed and the relay board will switch
the circuit so that the le high re switch monitors the dierential
pressure for the le side. e right low re pressure switch will
continue to control the right side until the unit stages to stage 4.
At that point, the right high re pressure switch will automatically
take over monitoring duties for the right side. A low air condition
in either plenum will cause a red light to illuminate on the indicator
board.
23
Finned copper tube gas boilers & water heaters – Boiler Manual
Table 15
Stage Pressure Switch Mode
Table 16 Pressure Switch Control, D1050-D2100
Stage Pressure Switch Mode
1- At Stage 1, the right main valve will be energized.
Table 17
Stage Control Action
Table 18 Low Air Condition Action, D1050-D2100
Stage Left Side Right Side
Pressure Switch Control, D300-D2100 – DB300 On/Off Only
1 Low Fire
2 High Fire
1 Left Low Fire N/A
2 Left Low Fire Right Low Fire
3 Left High Fire Right Low Fire
4 Left High Fire Right High Fire
Low Air Condition Action, D400-D2100 – DB300 On/Off Only
1 No Power to Ignition Mode
2 No Power to Ignition Mode
1
2
3
4
No Power to
Ignition Module
No Power to
Ignition Module
No Power to
Ignition Module
No Power to
Ignition Module
1
N/A
No Power to
Right Valve
Low
Right Valve
High
Right Valve
OPERATION SEQUENCE, ON/OFF D300
Refer to the included connection and wiring diagrams
for further control system information.
e stage controller will cycle up or down independent of the ame
sense module FSM. Stage switch 2 does not apply for on/o
operation.
POWER ON:
Demand for Heat:
1. The stage controller begins 50 second timing cycle before
energizing Stage 1.
2. When the timing cycle ends, stage switch 1 closes, energizing
the 24 volt limit circuit, the pump time delay relay TDR4 and
the pump terminals on the “Line Voltage Terminal Strip”.
3. e system checks limits and will not start if any limits are open.
Prepurge:
1. Prepurge timer TDR1 energizes. A 40 second delay on make
(DOM) timing cycle begins.
2. Relay K4 energizes. Normally open (N.O.) contact “K4-1” closes
sending power through the normally closed (N.C.) contact of
“K2-1” and energizing the blower at low speed. N.O. contact
“K4-3” is also closed energizing the optional power venter which
spools up closing its interlock. “Power Vent” indicator on. Stage
delay timer T3 also energizes. A 10 second delay on make timing
cycle begins. At the stage delay timer T3 also energizes. A 10
second delay on make timing cycle begins. At the end of this
timing cycle relay K2 energizes. e normally closed (N.C.)
contact of“K2-1” opens and the normally open (N.O.) contact
closes. e blower changes from low to high speed. Prepurge
continues.
3. e “low air” indicator will remain on as the blower spools up
to speed building enough pressure to make contact on the air
pressure switch. e “low air” indicator will turn o and the
“prepurge” indicator will turn on when the blower makes full
pressure.
4. Prepurge complete. Prepurge timer TDR1 times out. e
“TDR1-1” N.C. contact opens, turning o the “prepurge”
indicator. e “TDR1-1” N.O. contact closes, energizing the
ame sense module with 24 volt power.
Pilot Ignition Trial:
1. FSM energizes the pilot valve from the “PV” terminal to the
“MV” terminal of the pilot valve. The “PV” terminal also
energizes the “pilot” indicator.
2. FSM also energizes K7. e normally open contact of “K7-1”
closes, energizing the ignition spark for a 10 second ignition
trial. When the pilot ame has been proven the main valve will
open and the boiler will run until heat demand is satised.
3. If pilot ignition is not detected FSM will shut o power to “PV”
for 5 minutes pending a retry, the “pilot” light will turn o. Aer
5 minutes FSM will aempt to light the pilot with another 10
second ignition trial. If the pilot fails to light on the retry the
alarm contacts in FSM will close and there will be a 10 minute
shut down followed by a 10 second ignition trial. e contacts
will open and the unit will cycle back to the 5 minute shut
down period followed by the 10 second ignition trial. e unit
will continue trying for ignition following this alternating
sequence until the pilot lights or the call for heat is satised.
4. If main ame is established and then fails, FSM will shut o
the pilot and main valves. FSM will then retry as described
above.
5. Turning power o then on again will reset FSM to the beginning
of the ignition cycle.
Main Burner:
1. FSM energizes the main valve from the “MV” terminal direct
to the “LO” an “HI” terminals of the main valve. e “main
burner” indicator turns on. e shuto valve, opens via action
of relay K1 from the N.O. contact “K1-1”. e “PV” terminal
remains energized, the “pilot” indicator remains on.
2. e boiler is now operating on main ame.
24
Finned copper tube gas boilers & water heaters – Boiler Manual
Demand Satised:
1. Stage switch 1 opens, TDR1 de-energizes and the N.O. contact
“TDR1-1” opens. TDR4 also de-energizes but the N.O. contact
“TDR4-1” remains closed.
2.
Power is removed from FSM closing the main shuto valve, pilot
valve, and main valve. e blower and power venter shut o when
“K4-1” and “K4-3” open.
3. All indicators are o except “power ”.
4. e pump time delay relay TDR4 initiates a pump post purge
time period (adjustable from 0.1-10 minutes). At the end of the
timed period the N.O. contact “TDR4-1” opens and the pump
then shuts o.
ALARMS
Control
Stage controller alarms are visible on the controller’s LCD screen.
Alarm terminals are visible on the “Limit/Alarm Terminal Strip”
are available to provide an audio or visual indication of faults.
High Limit, Low Water Flow, Low & High Gas Pressure,
Power Venter Interlocks
e gas valves, the blower and power venter will shut o if any
interlock is tripped. e pump will cycle on and o via action of
the stage controller. Condition indicators are visible on the control
panel.
Low Air
e pressure switch will monitor blower air ow. Air monitoring
will begin at prepurge. If a low air condition is present, power will
not be supplied to FSM. Sucient air ow is required to close the
N.O. contact. Under a low air condition the N.C. contact on this
switch will remain closed energizing the “low air” indicator on the
control panel. e blower will remain on.
OPERATION SEQUENCE, 2STAGE
D400 THROUGH D900
On Models D1050-2100, 2 stage, factory jumpers
are installed on remote staging terminal strip to force
2- stage operation. Refer to the included connection and
wiring diagrams for further control system information.
POWER ON:
Demand for Heat:
1. BTC staging control starts pump and begins 50 second delay
before energizing Stage 1.
2. Stage switch 1 closes.
3. System checks primary limit and other interlocks. Will not start
if either switch is open.
Prepurge:
1. TDR1 energizes starting a 40 second prepurge cycle.
2. K3 energizes the low speed side of the blower. If the side wall
vent option is used the power venter is energized, closing the
power venter interlock . e power vent indicator light illuminates.
3. e low air indicator light will remain lit until the blower comes
up to speed. e indicator light will turn o and prepurge
indicator light will illuminate when the pressure switches make.
4. At the end of the prepurge cycle TDR1 times out. K3 opens
and the prepurge indicator light goes out. K2 closes sending
24VAC to the ignition control.
5. K2 will switch the pilot valve, main valve and blower to the
high or low re mode, depending on the staging control input.
Ignition Trial:
1. Once energized, the ame sense module (FSM) initiates 4 second
diagnostic cycle before sending 24VAC to the PV terminal and
energizing the ignition transformer.
2. e ame failure LED will be lit during the 4 second diagnostic
cycle unless the unit is congured for CSD-1. When the PV
terminal energizes, the LED will turn o. If the ignition trial
fails, the LED will relight.
3. e pilot valve and ignition transformer are energized for the
10 second ignition trial. e pilot indicator light illuminates
during this time.
4. If the ignition aempt is unsuccessful, the ignition module will
retry in 5 minutes.
5. Since the staging controller remains powered, it will continue
to stage up for as long as the call for heat exists. e blower,
pump and power venter will remain for as long as a call for heat
exists.
6. If the second ignition aempt is unsuccessful the gas valves will
lockout, but the blower, pump and power venter will remain
on. To reset the boiler/water heater, take one of the following
steps:
• Adjust the high limit down below the point at which the
blower shuts down, then reset the limit to its normal seing.
• Remove power from the boiler/water heater, wait 30 seconds
and re-establish power to the unit.
7. On CSD-1 applications the blower and power venter will shut
down and the boiler/water heater will lock out. e unit must
be manually reset.
Main Burner:
1. Once the pilot is proved the MV terminal on (FSM) is energized
sending 24VAC to the main gas valve.
2. e main gas valve opens via action of K1.
3. e main burner indicator light illuminates. e PV terminal
remains energized and the pilot indicator remains on.
25
Finned copper tube gas boilers & water heaters – Boiler Manual
Normal Operation
• Staging will be controlled from the staging controller.
• e front control panel separately monitors limit, gas pressure,
water ow and airow.
• If staging changes during operation, the blower, pressure switches
and gas valves will be switched or turned o as required.
• Stage 1 will operate rst and last.
For a change from stage 1 to 2, a 10 second DOM
time delay is provided in the pressure switch switching
circuit (TDR2). e time delay provides a hold state
that allows the blower to reach full speed and close
the high re pressure switch before it is energized to
conrm proper air ow.
Demand Satised:
1. Stage switch 1 opens, TDR1 de-energizes.
2.
Power is removed from ignition module, blower and power venter.
3. All indicator lights turn o except for the power indicator light.
4. Staging controller initiates a pump purge for 20 or more seconds,
depending on the inlet/outlet temperatures and ∆T seing in
the controller. e pump then shuts o.
Staging Control Alarms:
1. Staging control alarms are visible on the controller's LCD screen.
See the staging control documentation for details.
2. A powered alarm contact (2A max @ 24 VAC) is available to
provide an audio or visual indication of faults related only to the
staging control's operation. is contact is wired to the junction
box for optional remote indication. Refer to the 2-stage connection diagram for tie-ins.
High Limit, Low Water Flow, Low Gas Pressure, High Gas
Pressure, Power Venter Interlock Faults
1. All gas valves, the blower and power venter will be o if either
alarm is tripped.
2. e manual reset high limit can be reset through a knockout
accessible in the le side jacket panel.
3. Condition indicators are visible on the control panel.
Low Air (Blocked Flue/Air Inlet)
• One of two pressure switches will monitor blower airow.
• Air monitoring will begin at prepurge. If a low air condition is
present, power will not be supplied to the ignition module. e
blower will remain on and the low air indicator will remain on
for as long as stage 1 remains energized.
• A low air indicator is visible on the control panel.
OPERATION SEQUENCE, 4STAGE
D1050 THROUGH D2100
Refer to the included connection and wiring diagrams
for further control system information.
POWER ON:
Demand for Heat:
1. BTC staging control starts pump and begins 50 second delay
before energizing Stage 1.
2. Stage switch 1 closes.
3. System checks primary limit and other interlocks. Will not start
if either switch is open.
Prepurge:
1. TDR1 energizes starting a 40 second prepurge cycle.
2. K4 energizes the low speed side of both blowers. If the side-wall
vent option is used the power venter is energized, closing the
power venter interlock. e power vent indicator light illuminates.
3. e low air indicator lights will remain lit until the blowers comes
up to speed. e indicator lights will turn o and prepurge
indicator light will illuminate when the pressure switches make.
4. At the end of the prepurge cycle TDR1 times out and the TDR1
N.O. contacts close sending 24VAC to the ignition control.
5. e prepurge indicator light shuts o.
6. K2 will switch the pilot valve, le main valve and blower to high
re or low re, depending on the staging.
7. K3 will sw itch the right main valve and blower to high re or low
re, depending on the staging.
Ignition Trial:
1. Once energized, the ame sense module (FSM) initiates 4 second diagnostic cycle before sending 24VAC to the PV terminal
and energizing the ignition transformer.
2. e ame failure LED will be lit during the 4 second diagnostic
cycle unless the unit is congured for CSD-1. When the PV
terminal energizes, the LED will turn o. If the ignition trial
fails, the LED will relight.
3. e pilot valve and ignition transformer are energized for the
10 second ignition trial. e pilot indicator light illuminates
during this time.
4. If the ignition aempt is unsuccessful, the ignition module will
retry in 5 minutes.
5. Since the staging controller remains powered, it will continue
to stage up for as long as the call for heat exists. e blower,
pump and power venter will remain for as long as a call for heat
exists.
26
Finned copper tube gas boilers & water heaters – Boiler Manual
6. If the second ignition aempt is unsuccessful the gas valves will
lockout, but the blower, pump and power venter will remain
on. To reset the boiler/water heater, take one of the following
steps:
• Adjust the high limit down below the point at which the
blower shuts down, then reset the limit to its normal seing.
• Remove power from the boiler/water heater, wait 30 seconds
and re-establish power to the unit.
Main Burner:
1. Once the pilot is proved the MV terminal on (FSM) is energized
sending 24VAC to the main gas valve.
2. e main gas valve opens via action of K1.
3. e main burner indicator light illuminates. e PV terminal
remains energized and the pilot indicator remains on.
Normal Operation
• Staging will be controlled from the staging controller.
• e front control panel separately monitors limit, gas pressure,
water ow and air ow.
• If staging changes during operation, blowers, pres-sure switches
and gas valves will be switched or turned o as required.
• Stage 1 will be on rst, last and whenever the boiler operates.
For a change from stage 2 to 3 or 3 to 4, 10 second
DOM time delays were added to the pressure switch
switching circuits (TDR2 and TDR3). e time delays
provide hold states that allow the blowers to reach full
speed and close the high re pressure switches before
they are energized to conrm proper air ow.
High Limit, Low Water Flow, Low Gas Pressure, High Gas
Pressure, Power Venter Interlock Faults
1. All gas valves, the blowers and power venter will de-energize if
either alarm is tripped.
2. e manual reset high limit can be reset through a knockout
accessible in the le side jacket panel.
3. Condition indicators are visible on the control panel.
Low Air (Blocked Flue/Air Inlet)
• One of two pressure switches will monitor the airow of each
blower.
• Air monitoring will begin at prepurge.
• If a low air condition is present on the le side, power will not be
supplied to the module. e blowers will remain on and the low
air indicator will remain on for as long as a call for heat exists.
• If a low air condition is present on the right side, power will not
be supplied to the right gas valve.
• A low air indicator for each boiler side is visible on the control
panel.
OPERATING INSTRUCTIONS
FOR YOUR SAFETY READ BEFORE OPERATING
POUR VOTRE SÉCURITÉ LISEZ AVANT DE
METTRE EN MARCHE
Demand Satised:
1. Stage switch 1 opens, TDR1 de-energizes.
2.
Power is removed from ignition module, blowers and power venter.
3. All indicators (except power) o.
4. Staging controller initiates a pump purge for 20 or more seconds,
depending on the inlet/outlet temperatures and ∆T seing in
the controller. e pump then shuts o.
Staging Control Alarms:
1.
Staging control alarms are visible on the controller's LCD screen.
See the staging control documentation for details.
2. A powered alarm contact (2A max @ 24 VAC) is available to
provide an audio or visual indication of faults related only to
staging control operation. is contact is wired to the junction
box for optional remote indication. Refer to the 4-stage wiring
diagram for tie-ins.
A. is appliance is equipped with an ignition device which
automatically lights the pilot. Do not try to light the pilot by
hand.
Cet appareil est muni d'un dispositif d'allumage qui allume
automatiquement la veilleuse. Ne tentez pas d'allumer la veilleuse
manuellement.
B. BEFORE OPETING smell all around the appliance area
for gas. Be sure to smell next to the oor because some gas
is heavier than air and will sele on the oor.
Propane gas may not always be detected by smell.
Propane gas is heavier than air and can collect in low
areas.
Propane gas can ignite or explode if an ignition source is
present and result in death, serious injury and property
damage!
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Finned copper tube gas boilers & water heaters – Boiler Manual
FOR YOUR SAFETY
• Have only qualied licensed professionals install, service and
maintain this appliance and your gas system in accordance with
all applicable codes.
• Install a nationally listed combustible gas detector(s) in your
home.
• If you suspect a leak:
1. Have everyone leave the building immediately.
2. Do not aempt to light any appliance.
3. Do not touch any electrical or electronic switches in the
building.
4. Do not use any phone in the building.
5. Call your gas supplier from a phone outside of the building.
6. If you cannot reach your gas supplier call the re department.
AVANT DE FAIRE FONCTIONNER, reniez tout autour de
l'appareil pour déceler une odeur de gaz. Reniez près du plancher,
car certains gaz sont plus lourds que l'air et peuvent s'accumuler au
niveau du sol.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ:
• Ne pas tenter d'allumer d'appareil.
• Ne touchez à aucun interrupteur; ne pas vous servir des téléphones
se trouvant dans le bâtiment.
• Appelez immédiatement votre fournisseur de gaz depuis un
voisin. Suives les instructions du fournisseur.
• Si vous ne pouvez rejoindre le fournisseur, appelez le service de
incendies.
Operating Instructions
1. STOP! Read the safety information above. If, at any time,
the appliance will not operate properly, follow the instructions
“TO TURN OFF GAS TO APPLIANCE”.
2. Set the operating control or thermostat to o or its lowest seing.
3. Turn o all electric power to the appliance.
4.
Close the main manual gas shut-o valve, Figure 16.
5. Make sure that the gas supply piping has been purged of air
and that all gas joints up to the gas valve have been thoroughly
checked for leaks.Wait ve (5) minutes to clear out any gas. en
smell for gas, including near the oor. If you smell gas, STOP!
Follow “B” in the safety information above (to the le) on this
label. If you don’t smell gas, go to the next step.
6. Remove the upper front jacket panel.
7. Turn the knob on the pilot valve to o.
8. Turn the knob on the main gas valve to o, 300 & 400 models,
Figure 18. On 600 through 2100 models close the manual shuto
valve located in the control compartment, Figure 19.
9. Locate pilot and manifold pressure taps in the upper compartment.
Remove the 1/8 in screw plugs.
10. Connect a 20 in, 508 mm WC manometer to each tapping,
see Figure 19.
Figure 18 Pilot Valve (All Models)
Main Valve (300 & 400 Models)
C. Do not use this appliance if any part has been under water.
Immediately call a qualied service technician to inspect the
appliance and to replace any part of the control system and any
gas control that has been under water.
N'utilisez pas cet appareil s'il a été plongé dans l'eau, même
partiellement. Faites inspecter l'appareil par un tecnicien qualié
et remplacez toute partie du système de contrôle et toute
commande qui ont été plongés dans l'eau.
To prevent being burned, stand clear of the boiler
during ignition and don’t touch any hot metal parts!
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Finned copper tube gas boilers & water heaters – Boiler Manual
11. Turn the knob on the pilot valve to on, Figure 18.
12. Turn the knob on the main gas valve to on, 300 and 400 models,
Figure 18. On 600 through 2100 models open the manual shuto
valve located in the control compartment, Figure 19.
13. Turn on all electric power to the boiler.
Figure 19 Manual Valve & Manifold Pressure Tap
Table 19
Low Fire 1.5 ± .02
High Fire 2.5 ± 0.2
Low Fire 3.9 +/- 0.2
High Fire 9.3 +/- 0.2
(D300-D2100) Pilot & Manifold Settings – (D300 On/Off Only)
inches W.C.
inches W.C.
Natural Gas
mm W.C.
33 ± 5
63 ± 5
LP Gas
mm W.C.
99 ± 5
236 ± 5
14. Set the staging control or thermostat to the desired seing.
15. e pilot should automatically light. Do not try to light the pilot
by hand!
16. e burners should light with proper boiler operation.
17. e pilot and manifold pressures should match those listed
in Table 19. To adjust the manifold gas pressure see the “Gas
Pressure Adjustment” instructions in the “CHECKING AND
ADJUSTMENTS” section.
Required Gas Pressure
Provide gas supply pressure at inlet to boiler gas train as follows:
LP Nat
Minimum (in WC) 11 7
Maximum (in WC) 14 14
Measure pressure when the boiler is ring at full rate. Low gas pressure
could indicate undersized gas line or insucient gas supply.
"Static and operating gas pressure required at the gas valve inlet is
between 7 in WC and 14 in WC for natural gas and 11 in WC and
14 in WC for propane. If the gas pressure is above this limit, a lock-up
style regulator suitable for dead end service such as an Equimeter
or Fisher must be installed to prevent increase (creep) of gas pressure
when the units are not operating. is pressure regulator (supplied
by others) may be installed at the service entrance to each unit or
a "master" regulator sized to handle multiple units may be utilized.
Consult local gas utility or regulator manufacturer for recommendations to meet specic job site requirements."
Table 20
(D300-D2100) Combustion Readings – (D300 On/Off Only)
Natural Fuel Propane Fuel
CO
O
%
2
%
2
7.0 - 7.5 (low) 8.2 - 8.9 (low)
7.8 - 8.5 (high) 9.2 - 9.9 (high)
8.3 - 7.6 (low) 8.3 - 7.6 (low)
7.0 - 5.8 (high) 7.0 - 5.8 (high)
Instructions De Mise En Marche
1. ARRÊTEZ! Lisez les instructions de sécurité sur la portion
supérieure de cee étiquee.
2. Réglez le thermostat à la température la plus basse.
3. Coupez l'alimentation électrique de l'appareil.
4. Cet appareil est muni d'un dispositif d'allumage qui allume
automatiquement la veilleuse. Ne tentez pas d'allumer la veilleuse
manuellement.
5. Fermer la vanne manuelle d'arrêt d'alimintation de gaz.
6. Aendre cinq (5) minutes pour laisser échapper tout le gaz.
Reniez tout autour de l'appareil, y compris près du plancher,
pour déceler une odeur de gaz. Si vous sentez une odeur de gaz,
ARRÊTEZ! Passez à l'étape B des instructions de sécurité sur la
portion supérieure de cee étiquee. S'il n'y a pas d'odeur de gaz,
passez à l'étape suivante.
7. Ouver la vanne manuelle d'arrêt d'alimintation de gaz.
8. Meez l'appareil sous tension.
9. Réglez le thermostat à la température désirée.
10. Si l'appareil ne se met pas en marche, suivez les instructions
intitulées couper l'admission de gaz de l'appareil et appelez un
technicien qualié ou le fournisseur de gaz.
To Turn O Gas To Appliance
1. Set the operating control or thermostat to its lowest seing.
2. Turn o all electric power to the appliance if service is to be
performed.
3. Close the manual main valves.
COUPER L'ADMISSION DE GAZ DE L'APAREIL
1. Réglez le thermostat à la température la plus basse.
2. Coupez l'alimentation électrique de l'appareil s'il faut procéder
à l'entretien.
3. Fermer la vanne manuelle d'arrêt d'alimintation de gaz.
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Finned copper tube gas boilers & water heaters – Boiler Manual
CHECKING & ADJUSTMENTS
1. With the burners in operation, close the manual shuto valve in
the gas supply line. As soon as the main burner ames go out,
open the manual shuto valve. A normal ignition sequence should
take place. If the burners fail to light, the gas valves will close and
the system will go into a 5-minute lock out period. e ignition
module will then make a second ignition aempt. If the unit won't
light ensure that the gas piping is fully purged of air. Inspect the
ignition system and ensure that it is operating properly.
2. To test the ignition safety shuto device, close the manual shuto
valve in the gas supply line. Within 5 seconds of main burner
ame extinction, the main gas valve solenoid should close with
an audible noise.e pilot light on the display board should be lit
while the ignition module tries to relight the pilot. Aer 10
seconds the module should lockout and the trial for ignition end.
Aer 5 minutes a second trial for ignition should occur. O pen the
manual shuto valve in the gas supply line and reset the ignition
control system. A normal ignition sequence should take place.
3.
With the burners in operation, interrupt the power to the control
circuit by reducing the target temperature of the staging controller
or turning down the thermostat. e boiler/water heater should
stage down and shut down. Reset the operating control or thermostat. A normal ignition sequence should follow.
Input Rate, Natural Gas
Gas appliances are rated based on sea level operation with no
adjustment required at elevations up to 5000 , 1524 m. At
elevations above 5000 , 1524 m, input ratings should be reduced
by 4% for each additional 1000 , 305 m.
Check the input rate as follows:
1. Turn o all other gas appliances that use the same gas meter as
the boiler/water heater.
2. Call your gas supplier and ask for the heating value of the gas.
3. Connect a ue gas analyzer to the vent pipe.
4. Start the boiler/water heater and let it run for 15 minutes.
5. Using the gas meter and a stopwatch, clock the time that it takes
to burn 10 3, 0.28 m3 of gas and divide this time by 10.
6. Insert the heating value and the time, in seconds, into the formula
below.
7.
Input = (heating value, Btu/hr)(3600)/(time, seconds)
8. If the computed rate deviates by more than 5% from the rated
input value of the unit adjust the manifold pressure accordingly.
DO NOT adjust the manifold pressure by more than 5%. If a
proper rate cannot be maintained without adjusting the manifold
pressure beyond the 5% limit, the main burner orices must be
replaced. If the input rate is too low, go to the next larger size of
main burner orices. If the input rate is too high, go to the next
smaller size.
9. At full input the CO2 should be between 7.5% and 8.5%
with a CO reading of less than 50 ppm. See Table 20.
Never increase the input of the boiler/water heater
above that for which it is rated. Doing so can cause
premature failure of the unit!
Pilot Adjustment
e pilot burner is actually an isolated main burner that
stages with the other burners. It is controlled by a separate pilot
valve. Pilot pressure seings are as shown in Table 19. ese pressures
are measured at the pilot pressure valve, see Figure 19. See Tables
12 and 13 to determine the ring mode that is associated with each
stage.
To view the pilot without main burner operation, take the following
steps:
For D300-D400:
1. Remove the upper front jacket panel.
2. Turn o main burner gas ow by turning the main burner gas
valve knob to the o position, Figure 18.
3. Observe the pilot ame through the observation port located
at the le end of the unit.
For D600-D2100:
1. Remove the upper front jacket panel.
2. Turn o main burner gas ow by turning the manual gas valve(s)
in the control compartment to the o position, see Figure 19.
3. Observe the pilot ame through the observation port located
at the le end of the unit.
Pilot pressures will be set at the factory. However, if it is necessary
to adjust the pilot pressure to match those in Table 19, take the
following steps:
1. Remove the upper front jacket panel.
2. Remove the 1/8 in plug from the pilot pressure test port and
connect a 20 in, 508 mm WC manometer to it, see Figure 18.
3. Remove the gas pressure regulator cap from the pilot valve. See
Figure 18 for the location of the regulator and cap.
4. Use a 3/32 hex wrench to turn the pressure regulator adjustment
screw clockwise to increase the pilot pressure and counterclockwise
to decrease it.
5. Replace the pressure regulator adjustment screw cap.
Gas Pressure Adjustment
e maximum inlet gas pressure listed on the rating
plate must not be exceeded or damage to the boiler/
water heater may occur voiding the warranty!
e minimum supply pressure listed on the rating plate is for input
adjustment.
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Finned copper tube gas boilers & water heaters – Boiler Manual
NATUL GAS: Optimum results are obtained when the boiler/
water heater is operated with the manifold pressure(s) set per Table
19. e manifold pressure should not vary outside these ranges.
Each gas valve pressure regulator has been preset at the factory.
If adjustment is necessary the following steps must be followed:
1. Remove the 1/8 in plug(s) from the manifold pressure valves.
Connect 20 in, 508 mm WC manometers to them, see Figure
18.
2. Remove the regulator adjustment screw cap from the safety shut
o valve(s).
3. Rotate the regulator adjustment screw clockwise to increase the
manifold pressure, counterclockwise to decrease it.
4. Replace the regulator adjustment screw cap and manual shut o
valve pressure tap plug.
Never force the regulator adjustment screw beyond
the stop limits or damage to the regulator will occur!
PROPANE GAS: Optimum results are obtained when the boiler/
water heater is operated with the manifold pressure(s) set per Table
19. If the manifold pressure is o by more than 5% adjust it according
to steps 1 through 4 above.
Airow Adjustment
1. Remove the upper front jacket panel.
2. Connect both sides of a manometer to the pressure switch tee,
Figure 18, going to one of the pressure switches.
3. With the unit operating at high re the dierential pressure should
be between 0.6 and 0.8 in, 15 and 20 mm WC. Do not change
air pressure in lower stages.
4. To ne tune the air seings once the upper front jacket panel is
installed, remove the plastic plug(s) on the upper front jacket
panel. Use a Phillips screwdriver to rotate the screw(s) to obtain
the CO2 and CO readings in the INPUT TE section above.
CONTROL DESCRIPTION
Boiler Thermostat
If a thermostat is to be used to control the boiler always follow the
instructions included with the thermostat. Proper location of the
thermostat will ensure ecient trouble-free operation of the boiler.
Mount the thermostat to an inside wall at a height approximately
ve feet above the oor.
Avoid placing the thermostat in areas that will not provide an accurate
measurement of the room temperature. Locating the thermostat
behind a door, in an alcove, close to a source of thermal radiation
or in a dray area will cause poor or sporadic heating.
For a thermostat that employs an adjustable heat anticipator, adjust
the anticipator to match the current measured in the thermostat
circuit. An increased anticipator seing may be necessary if the unit
cycles frequently. If the room temperature over-shoots the thermostat
seing, reduce the anticipator seing.
Operating Control
e preferred control seing for potable hot water is 130°F, 54°C.
e operating control should be set to the lowest seing that will
satisfy the consumer's needs.
Seing the thermostat or operation control too high
can result in scalding resulting in severe personal injury!
High Limit (Aquastat)
e high limit is located in the le side area of the boiler/water
heater. A remote capillary bulb is run to a well on the outlet side
of the supply header. e high limit can be reset by depressing the
black rubber plug in the front top jacket panel.
e water heater high limit should be set a minimum of 20°F,
11°C higher than the operating control. Refer to the HOT WATER
SUPPLY section for the proper supply water temperature.
Flow Switch
A ow switch is provided in the water outlet piping to prevent the
boiler/water heater from ring without adequate water ow through
the heat exchanger.
Low Water Cuto
If the boiler is to be installed above radiation or if required by other
codes or regulations, install a low water cuto in appropriate piping.
Wire the switch and any external controls in series to the "Interlock"
contacts in the junction box (see the aached Connection Diagrams
for details). Ensure that the low water cuto device(s) will function
properly.
Flame Sense Module
e ame sense module is located on the control tray. It is an
intermient pilot control device that controls the pilot gas ow,
spark energy to ignite the pilot gas and the main valve(s) once pilot
ignition has been proven.
Two ame failure alarm terminals are provided on the ame sense
module. For CSD-1, these terminals will be utilized to shut the unit
down in case of ame failure. e two terminals will be connected
to a lockout control module located on the control tray under the
ame sense module. is lockout control module contains a magnetic
latch relay that requires manual reset when de-energized. To reset
aer ame failure, push and release the momentary contact switch
located within the front control panel.
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Finned copper tube gas boilers & water heaters – Boiler Manual
Relay Board
e relay board is located in the control tray. It provides sequencing
of the gas valves and blower(s) based on the staging controller's
input. It also provides the following time delays for proper unit
operation:
• A 40 second prepurge when stage 1 is energized.
• A 10 second pressure switch sequencing delay when the blowers
switch from low re to high re. e delay enables the blower to
come up to speed before the high pressure side of the pressure
switch conrms proper air ow.
ese time delays are set within the separate time delay board
connected to the relay board.
Gas Pressure Switch
An optional low and/or high gas pressure switch will shut
down the 24V circuit if excessively high or low gas pressure exists
in the gas train or supply piping.
BTC Staging Control
e staging control is located at the front of the control tray. It
utilizes various temperature sensors to calculate boiler/water heater
demand and adjust the stages as required. Various features of the
control can be adjusted from the 3-buon panel on the controller.
To change seings of the staging controller, press and hold all three
buons approximately 2 seconds until the “adjust” screen appears,
then release them. e staging controller provides 6 modes of
operation based on the requirements of the system. e desired
mode can be set manually from the controller. Each mode is dened
below. Refer to the control manufacturer’s documentation for more
information on the controller and its adjustment features.
At the rear of the controller, two DIP switches are provided to allow
an installer to modify staging control operation. ese switches are
factory set to provide a "lockout" with minimum adjustment
capabilities in the eld. However, for experienced installers and
operators, changing these switch seings can oer many ne-tuning
features. Consult the control manufacturer's documentation for
more information on the controller and its adjustment features.
DO NOT change DIP switch or controller seings
unless you have completely read and understood this
document and the control manufacturer's instructions.
Doing otherwise will lead to improper stage control
operation.
Mode 1: Setpoint control. Dominator piped in parallel with
the system. e ring stages are operated to provide a setpoint
temperature at the boiler/water heater outlet.
SETPOINT OPETION - e control operates the boiler stages
to maintain the programmed temperature at the boiler/water heater
outlet sensor whenever a heat demand is present.
Mode 2: Setpoint control. Dominator piped in primary/
secondary conguration. An additional system sensor is required
to properly control the system supply (primary loop) temperature.
e ring stages are operated to provide a setpoint temperature in
the primary loop.
SETPOINT OPETION - e control operates the boiler/water
heater stages to maintain the programmed temperature at the supply
sensor (primary loop sensor) whenever a heat demand is present.
Mode 3: Domestic Hot Water (DHW) generation. Dominator
piped in parallel with the storage tank. DHW demand from sensor
located in tank or pool supply pipe. e ring stages are operated
to provide a setpoint temperature and maintain DHW tank
temperature.
DHW OPETION - e control operates to maintain the
programmed tank target temperature at the outlet sensor whenever
a DHW demand is present. A DHW demand is generated whenever
the temperature sensed by the DHW sensor drops below the
programmed tank target temperature by 1/2 the programmed
dierential, adjustable from 2 to 10°F, -17 to -12°C. e demand
remains until the temperature sensed by the DHW sensor rises
above the programmed tank target temperature plus 1/2 the
programmed dierential.
Mode 4: Outdoor reset control. Dominator piped in parallel
with the system. e ring stages are operated to provide outdoor
reset temperature control at the boiler/water heater outlet.
OUTDOOR RESET OPETION - e control operates the
water heater/boiler stages to maintain the calculated target supply
temperature at the boiler outlet sensor. e temperature is calculated
by the outdoor reset feature, which increases the target boiler outlet
temperature as outdoor temperature drops. Whenever the outdoor
temperature is greater than the WWSD (Warm Weather Shut Down)
seing, the control ignores the call for heat.
OUTDOOR RESET WITH DHW OPETION - A DHW tank
controlled by a pump provides reset override whenever DHW
generation is required. In Mode 4, reset override will occur if
the staging controller receives a signal across the "STPT DEM"
and "DEM SIG" terminals of the terminal strip. (i.e., closing a tank
aquastat switch wired to these terminals). In this case, the control
will temporarily override outdoor reset and increase the target
temperature to 180°F, 82°C to provide sucient heat to satisfy
the DHW requirement.
Mode 5: Outdoor reset control. Dominator piped in primary/
secondary conguration. An additional system sensor is required
to properly control the system supply (primary loop) temperature.
e ring stages are operated to provide outdoor reset temperature
control in the primary loop.
OUTDOOR RESET OPETION - e control operates the
water heater/boiler stages to maintain the calculated target supply
temperature at the supply sensor. e temperature is calculated by
the outdoor reset feature, which increases the target supply temperature as outdoor temperature drops. Whenever the outdoor
temperature is greater than the WWSD (Warm Weather Shut Down)
seing, the control ignores the call for heat.
32
Finned copper tube gas boilers & water heaters – Boiler Manual
OUTDOOR RESET WITH DHW OPETION - A DHW
tank controlled by a pump provides reset override whenever
DHW generation is required. In Mode 5, reset override will occur
if the staging controller receives a signal across the “STPT DEM”
and “DEM SIG” terminals of the terminal strip. (i.e., closing a tank
aquastat switch wired to these terminals). In this case, the control
will temporarily override outdoor reset and increase the target
temperature to 180°F, 82°C to provide sucient heat to satisfy
the DHW requirement.
Mode 6: Multiple BTC controls. e control only operates
the pump and stage one.
REMOTE STAGING - An external staging control is used to control
and stage multiple boiler/water heaters. Factory supplied terminals
in the electrical box are used.
e operating control on the boiler/water heater is set to its lowest seing when the water heater leaves the factory. e preferred
control seing for potable hot water is 130°F, 54°C. e operating control should be set to the lowest seing that will satisfy the
consumer's needs.
MAINTENANCE
Disconnect electrical power and close the manual gas
shut o valve before performing maintenance or severe
personal injury may result!
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal
injury, exposure to hazardous materials or loss of life.
Installation and service must be performed by a
qualied installer, service agency or the gas supplier
who must read and follow the supplied instructions
before installing, servicing or removing this boiler.
is boiler contains crystalline silica materials that have
been identied as carcinogenic or possibly carcinogenic
to humans when inhaled.
AVERSSEMENT: une instqallation, un réglage,
une réparation ou un entretien non comforme aux
normes peut entraîner des dommages matériels, des
blessures,exposition à des matiéres dangereuses ou la
mort. L’installation et l’entretien doivent être eectués
par un installateur ou un service d’entretien qualié ou
le foumisseur de gaz qui doivent avoir lu les
instructions foumies avant de faire l’installation,
l’entretien ou l’enlèvement de la chaudière et les
respecter, Cee chaudière contient des matériaux qui
ont été identiés comme étant cancérogènes ou l’être.
Ser vicing, inspection and adjustment must be done by
a trained technician in accordance with all applicable
local and national codes. Improper servicing or adjust-
ment can damage the boiler/water heater!
e ceramic combustion chamber contains crystalline
silica. Wear a tightly ed dust mask when removing
the burners or heat exchanger to prevent inhalation
of airborne bers. Crystalline silica bers have been
identied as carcinogenic, or possibly carcinogenic
when inhaled.
e boiler/water heater should be cleaned and inspected once a
year, before each heating season. Make sure that the burner and
ignition components are free from dust, soot, dirt, corrosion or other
deposits that would impair the boiler/water heater’s performance.
Refer to page 38 for component identication.
Improper burner servicing can result in premature
burner failure voiding the warranty!
Burner Inspection And Removal - Figure 20
1. Close the manual shuto valves in the gas supply lines and turn
o electrical power to the boiler/water heater.
2. Remove the jacket front panels.
3. Disconnect the manifold gas piping at the ground joint union(s).
Also disconnect the pressure sensing lines, pilot tubing and
ignition and sensing leads.
4. Remove the manifold(s).
5. Remove the burner(s) from the lower front combustion chamber
panel.
6. Inspect the burner(s) for damage or signs of deterioration. Use a
brush or compressed air to remove any debris from the burner
ports.
7. DO NOT install a damaged or badly corroded burner, replace
it.
8. Install the burner(s) making sure that the burner gasket is not
torn or deteriorated. If it is replace it.
9. Reassemble the unit following the removal steps in reverse order.
Heat Exchanger Inspection - Figure 20
1. Close the manual shuto valves in the gas supply lines and turn
o electrical power to the boiler/water heater.
2. Remove the jacket front panels.
3. Disconnect gas piping at the ground joint union(s). Also
disconnect the pressure sensing lines, pilot tubing and ignition
and sensing leads.
4. Remove the upper partition panel, 1050 thru 2100 models.
5. Remove the 1/4 in nuts and washers holding the upper
combustion chamber front panel in place and carefully remove
it.
6. Inspect the inside and outside of the heat exchanger for signs of
damage, sooting or corrosion.
7. e outside surfaces of the copper tubes should be free of any
soot deposits. A slight black smudge is normal with some types
of gases. Black soot indicates poor combustion. Green deposits
indicate condensation due to low return water temperatures. In
either case the heat exchanger must be cleaned thoroughly and
the problem resolved before the boiler/water heater is returned
to service.
33
Finned copper tube gas boilers & water heaters – Boiler Manual
8. If there are no signs of damage, sooting or corrosion reassemble
the unit following the previous steps in reverse order.
9. A badly corroded or damaged heat exchanger must be replaced,
see the Heat Exchanger Removal section.
Heat Exchanger Removal, Cleaning
& Replacement - See Figure 20
1. Close the shut o valves in the inlet and outlet piping. On heating
systems close the system ll valve and relieve the system pressure
from the boiler by carefully liing the relief valve or opening the
drain valve.
2. Drain the boiler/water heater and disconnect it from the system
piping.
3. Remove the inlet/outlet and return headers.
4. Remove the front jacket panels.
5. Loosen, 4 turns, but don't remove the 6 screws (3 on each side)
holding the heat exchanger upper rails in place, Figure 21.
6. Disconnect gas piping at the ground joint union(s). Also
disconnect the pressure sensing lines, pilot tubing and ignition
and sensing leads.
7. Remove the upper partition panel, 1050 thru 2100 models.
8. Remove the 1/4 in nuts and washers holding the upper combustion chamber front panel in place and carefully remove it.
9. Carefully slide the heat exchanger out of the unit.
10. Remove the "V" bae straps and "V" baes.
11. oroughly inspect the heat exchanger for signs of damage. If
there is no damage, clean the heat exchanger with water from a
high-pressure hose. Use a so bristle brush if necessary.
Never clean the heat exchanger while it’s in the boiler/
water heater or the combustion chamber will be
destroyed!
12. Sagging or distorted heat exchanger tubes are an indication of
low water ow through the system. A leaking or otherwise
damaged heat exchanger must be replaced and the condition that
caused the damage resolved before the boiler/water heater is
returned to service.
13. If the heat exchanger isn't damaged rewire the heat exchanger
baes in place and slide the heat exchanger back into the unit.
14. Reinstall all of the other components in the reverse order of their
removal.
15. e torque values for the bolts that secure the removable headers
are 17-20 lbs. Once bolts have been started and secured the
tightening sequence is as follows:
1) Middle Top
2) Middle Boom
3) Right Top
4) Le Boom
5) Le Top
6) Right Boom
Figure20 Burner and Heat Exchanger Servicing
34
Finned copper tube gas boilers & water heaters – Boiler Manual
Figure 21 Heat Exchanger Upper Rail Screws
5. e aquastat high limit controls the maximum water
temperature in the boiler. It should be set at least 20°F, 11°C
above the operator setpoint. If the water temperature reaches the
set temperature before the demand for heat has been met, the
aquastat high limit should shut the boiler o. e water
temperature should never exceed the maximum set point of
240°F, 116 °C. e aquastat high limit cannot be repaired. If
it fails to function properly replace it.
6. Visually check the pilot and main burner ames to ensure proper
operation, see Figure 22.
A yellow, oating ame indicates a lack of combus-
tion air. A liing ame indicates too much combustion
air. Do not operate the boiler/water heater until the
problem is solved or severe personal injury or death
may occur!
Vent System
oroughly inspect the vent system for any signs of blockage,
corrosion or leakage. Immediately replace any unsound vent system
piping.
Controls
Use the "BOILER/WATER HEATER OPETION" and
"CHECKING AND ADJUSTMENTS" sections of this manual
for reference.
1. Check the thermostat or operating controls for proper operation.
2. oat type low water cuto device must be ushed out per the
manufacturers' instructions. e probe on a probe low water
cut o must be removed, cleaned and inspected at least once
a year. Ensure that the low water cutos operate properly. If not,
replace them.
3. e ow switch contacts must be open when water ow is not
present.
4. e relief valve should not weep or discharge water at normal
system pressure. If it does, contact a qualied service technician
to have it inspected. NEVER try to clean or repair the relief
valve! If the valve fails to operate properly, have it replaced!
Figure 22 Pilot and Main Burner Flame
35
Finned copper tube gas boilers & water heaters – Boiler Manual
TROUBLESHOOTING
SYMPTOM CHECK ACTION
1 No Power To Unit 1. Power not connected
2. External circuit breaker open
3. Relay board fuse (24V) blown
4. Transformer circuit breaker open
(4 stage)
2 No Action On Call For Heat 1. Primary limit or other control/interlock
open
2. Low water cutoff open
3. Stage control sensor(s) not wired
or are malfunctioning
4. Stage control malfunction
3 No Power To Pump 1. Pump contact not wired
2. Stage control malfunctioning
3. Pump malfunctioning
1. Wire unit to line voltage
2. Reset breaker
3. Replace fuse
4. Reset breaker
1. Check indicator board, reset limit or
control or resolve problem as applicable
If not resolved, check wiring and
condition of limit.
2. Check circulating pump
2. Check pump contact in J-box
2. Check LWCO wiring and condition
3. Wire sensor(s) to J-box or replace as
necessary
Check error message on control, refer to
control documentation
4. Replace stage control
1. Wire pump contact to J-box
2. Replace stage control
3. Replace pump
4 No Power to Power Venter 1. Power venter contact not wired
2. Power venter not wired to external power
3. Relay fault
4. Power venter fault
5 Power Venter On, No Action From Unit 1. Power venter interlock open
2. Power venter interlock not wired
6 No Power To Blower(s) 1. Blower(s) not plugged in
2. Relay fault
3. Blower(s) malfunctioning
4. Fault in prepurge circuit
1. Wire power venter contact to J-box
2. Wire power venter as shown in
connection diagram
3. Replace relay
4. Replace power venter
1. Check indicator board for power vent
indication
If indication exists, check ue or chimney
for blockage
2. Wire power venter interlock as shown in
connection diagram
1. Plug in blower(s)
2. Replace blower relay
3. Replace blower(s)
4. Replace timer board
36
Finned copper tube gas boilers & water heaters – Boiler Manual
TROUBLESHOOTING
SYMPTOM CHECK ACTION
7 Unit Does Not Spark 1.
8 Unit Sparks But Will Not Fire 1. Low gas pressure
9 Pilot Lights But Unit Will Not Fire 1. Bad ame sense lead from ignitor to
10 Insufcient Heating 1. Target temperature too low
11 Unit Consistently Shuts Down 1. Primary (safety high) limit set to low 1. Increase limit setting On Limit
Incorrect spark gap or shorted ignitor lead
2. Bad ground on ame sense module
3. Low air (blocked ue/inlet) condition
4. Spark generator fault
2. Pilot valve manual knob closed
3. Pilot wires disconnected
4. Low pilot pressure
5. Pilot valve malfunctioning
ame sense module
2. Manual valve(s) closed
3. Low manifold pressure
4. Main valve(s) malfunctioning
2. Primary (safety high) limit set too low
1. Adjust ignitor rod or correct short
2. Check ground connections, adjust as
necessary
3.
Check indicator board for low air indication
If condition exists, check inlet, ue,
chimney for blockage
Check combustion air/ventilation
opening in space
Check inlet air lter, clean/replace as
necessary
4. Check spark generator wiring
1. Check gas supply pressure, adjust as
necessary
2. Open pilot valve manual knob
3. Reconnect wires
4.
Check pilot pressure, adjust as necessary
5. Replace pilot valve
1. Check ground connections, adjust as
necessary
2. Remove upper front jacket panel, open
manual valve(s)
3. Check manifold pressure, adjust as
necessary
4. Replace main valve(s)
1.
Increase stage control target temperature
2. Increase limit setting
12 Bad Combustion
(High CO, Yellow Flames)
13 Gas Flow Shuts Down During
Operation (Blowers Remain On)
1. Insufcient air
2. Dirty inlet air lter
3. Too much air
1. Low air (blocked ue/inlet) condition 1. Check indicator board for low air
1. Check CO, adjust blower inlet damper(s)
to increase airow
Check for plenum air leakage from lower
front jacket panel seams, repair as
necessary
2. Remove, inspect and clean inlet air lter
as necessary
3. Check CO, adjust blower inlet damper(s)
to decrease airow
indication air indication
If condition exists, check inlet, ue,
chimney for blockage
Check combustion air/ventilation
openings in space
Check inlet air lter, clean/replace as
necessary
37
Finned copper tube gas boilers & water heaters – Boiler Manual
REPAIR PARTS
Figure 23 Replacement Parts
RIOM-22 REV-B
38
Finned copper tube gas boilers & water heaters – Boiler Manual
REPAIR PARTS (CONTINUED)
Model Size with Item Quantities Below
Ref # Name of Part Part # 300 400 600 750 900 1050 1350 1500 1950 2100
8 Filter (Indoor)
Filter (Outdoor)
Cerablanket Insulation (per square foot) 05-0103 4 4 4 6 8 8 10 10 12 12
NS
Manning Glass Insulation (per square foot) 05-0104 6 6 6 8 10 10 12 12 14 14
Manning Glass Tape (per ft) 66-0105 4 4 6 8 10 14 16 16 18 18
PVC Gasket Foam (per ft / per roll 50’) 66-0103 50 50 50 50 50 50 50 50 50 50
2” Blanket Insulation (per sq ft) 05-0200 20 20 22 24 28 30 36 36 44 46
Red Silicone Gasket (per ft / per roll 50’) 06-0146 50 50 50 50 50 50 50 50 50 50
15 Combustion Chamber Lower Front Panel
16 Combustion Chamber Upper Front Panel
23 Flue Outlet Assembly
09-0488 1 1
09-0489 1 1
09-0497 1 1
09-0498 1 1 1 1
09-0490 1 1 1 1
09-0491 1 1 1 1 1 1
03-1962 1
03-1963 1
03-1964 1
03-1965 1
03-1966 1
03-1967 1
03-1968 1
03-1969 1
03-1970 1
03-1971 1
70-2775 1
70-2776 1
70-2777 1
70-2778 1
70-2779 1
70-2780 1
70-2781 1
70-2782 1
70-2783 1
70-2784 1
70-2736.1 1
70-2737.1 1
70-2738.1 1
70-2739.1 1
70-2740.1 1
70-2741.1 1
70-2742.1 1
70-2735.1 1
70-2743.1 1 1
39
Finned copper tube gas boilers & water heaters – Boiler Manual
REPAIR PARTS (CONTINUED)
Model Size with Item Quantities Below
Ref # Name of Part Part # 300 400 600 750 900 1050 1350 1500 1950 2100
24, 25, Tile Kit
27 05-0203 1
End Refractory Panel, Right 05-0058 1 1 1 1 1 1 1 1 1 1
26
End Refractory Panel, Left 05-0107 1 1 1 1 1 1 1 1 1 1
Main Orice, NG 10-0087 3 7 9 11 13 17 19 25 27
29
Main Orice, LP 10-0088 3 7 9 11 13 17 19 25 27
Main Orice, NG 10-0091 5
Main Orice, LP 10-0116 5
Pilot Orice, NG 10-0089 1 1 1 1 1 1 1 1 1
NS
Pilot Orice, LP 10-0090 1 1 1 1 1 1 1 1 1
Pilot Orice, NG 10-0093 1
Pilot Orice, LP 10-0094 1
Burner Tube 10-0275 3 5 7 9 11 12 16 18 24 26
30
Burner Tube w/hole for Pressure Switch 70-2898 1 1 1 1 1 2 2 2 2 2
Pilot Tube Assembly (tubing and ttings) 70-2896 1 1 1 1 1 1 1 1 1 1
NS Burner Gasket (pkg of 10) 21-2011 1 1 1 1 2 2 2 2 3 3
NS Burner Support Rail
Spark Ignitor
31
(*prior to 0206 - must order w/cable 44-0056)
NS Ignition Cable Assembly 44-0056 1 1 1 1 1 1 1 1 1 1
05-0202 1
05-0204 1
05-0205 1
05-0206 1
05-0207 1
05-0208 1
05-0209 1
05-0210 1
05-0211 1
03-2090 1
03-2091 1
03-2092 1
03-2093 1
03-2094 1
03-2095 1
03-2096 1
03-2097 1
03-2098 1
03-2099 1
16-0327* 1 1 1 1 1 1 1 1 1 1
40
Finned copper tube gas boilers & water heaters – Boiler Manual
REPAIR PARTS (CONTINUED)
Model Size with Item Quantities Below
Ref # Name of Part Part # 300 400 600 750 900 1050 1350 1500 1950 2100
NS Heat Exchanger Assembly (Copper)
Cast Iron Headers 70-2827 1
Heat Exchanger Assembly (Copper)
Bronze Headers 70-2847 1
Individual copper/cupronickel tubes* available for eld repair *model and serial number required
Tube Expansion Tool 30-0761 1 1 1 1 1 1 1 1 1 1
Heat Exchanger Assembly (Cupronickel)
Cast Iron Headers 70-2837 1
Heat Exchanger Assembly (Cupronickel)
Bronze Headers 70-2857 1
70-2826 1
70-2828 1
70-2829 1
70-2830 1
70-2831 1
70-2832 1
70-2833 1
70-2834 1
70-2835 1
70-2846 1
70-2848 1
70-2849 1
70-2850 1
70-2851 1
70-2852 1
70-2853 1
70-2854 1
70-2855 1
70-2836 1
70-2838 1
70-2839 1 1
70-2840 1
70-2841 1
70-2842 1
70-2843 1
70-2844 1
70-2845 1
70-2856 1
70-2858 1
70-2859 1
70-2860 1
70-2861 1
70-2862 1
70-2863 1
70-2864 1
70-2865 1
41
Finned copper tube gas boilers & water heaters – Boiler Manual
REPAIR PARTS (CONTINUED)
Ref # Name of Part Part # 300 400 600 750 900 1050 1350 1500 1950 2100
32 Tube Bundle (Copper)
Tube Bundle (Cupronickel)
NS Heat Exchanger “V” Baes
34 Hold-Down Clip 03-2164 18 18 18 18 18 36 36 72 36 72
NS Heat Exchanger Support Channel
35 O Ring (pkg of 20) 21-2010 1 1 1 1 1 1 1 1 1 1
36 Stud, Inlet/Outlet & Return Headers ASME 57-0223 12 12 12 12 12 12 12 12 12 12
37 Nut, Inlet/Outlet & Return Headers ASME 57-0492 12 12 12 12 12 12 12 12 12 12
Return Header, Bronze 01-0018.1 1 1 1 1 1 1 1 1 1 1
38
Return Header, Cast Iron 01-0023S 1 1 1 1 1 1 1 1 1 1
Inlet/Outlet Header, Bronze 01-0019.1 1 1 1 1 1 1 1 1 1 1
39
Inlet/Outlet Header, Cast Iron 01-0022S 1 1 1 1 1 1 1 1 1 1
Blower, Fasco 7062 12-0013 1 1 1
40
Blower, Fasco 7083 12-0014 1 1 2 2 2 2 2
41 Combustion Air Damper Assembly
Low Pressure Switch (.30 WC) 14-0059 1 1 1 1 1 2 2 2 2 2
42
High Pressure Switch (.58 WC) 14-0058 1 1 1 1 1 2 2 2 2 2
High Limit, L4008E, (DB) 14-0112 1 1 1 1 1 1 1 1 1 1
43
High Limit, L4008E, (DW) 14-0105 1 1 1 1 1 1 1 1 1 1
High Limit Well, 3/8 x 3 13-0104 1 1
High Limit Well, 3/8 x 3 3/16 13-0105 1 1 1 1 1 1 1 1
NS Operator, T6031A (pool heater) 14-0003 1 1 1 1 1 1 1 1 1 1
42
70-2901 1
70-2902 1
70-2903 1
70-2904 1
70-2905 1
70-2906 1
70-2907 1
70-2908 1
70-2909 1
70-2910 1
70-2911 1
70-2912 1
70-2913 1 1
70-2914 1
70-2915 1
70-2916 1
70-2917 1
70-2918 1
70-2919 1
70-2920 1
03-2011 9 36
03-2012 9
03-2013 9 36
03-2014 9
03-2015 9
03-2016 18
03-2017 18
03-2019 18
03-2023 1
03-2024 1
70-2818 1 1 1
70-2819 1 1 2 2 2 2 2
Model Size with Item Quantities Below
Finned copper tube gas boilers & water heaters – Boiler Manual
REPAIR PARTS (CONTINUED)
Model Size with Item Quantities Below
Ref # Name of Part Part # 300 400 600 750 900 1050 1350 1500 1950 2100
Firing Valve, 3/4” 11-0461 1 1
44
Firing Valve, 1” 11-0456 1 1 1 2 2 2 2
Firing Valve, 1 1/4” 11-0457 2
NS Manual Pilot “B” Valve 11-0031 1 1 1 1 1 1 1 1 1 1
Main Gas Valve, VR8304M (300 only) 11-0056 1
45
Main Gas Valve, VR8305 11-0087 1
Main Gas Valve, V8944B, 1” 11-0171 1 1 1 2 2 2 2
Main Gas Valve, V8944B, 1 1/4” 11-0172 2
Safety Valve, L8214G, 1” 11-0371 1 1 1
46
Safety Valve, L8214G, 1 1/4” 11-0364 1 1 1
Safety Valve, L8214G, 1 1/2” 11-0365 1 1
Main Gas Valve, VR8304M (300 only) 11-0056 1
47
Pilot Valve, VR8205Q 11-0086 1 1 1 1 1 1 1 1 1
Manual Shut O Valve, 1” 11-0456 1 1 1
48
Manual Shut O Valve, 1 1/4” 11-0457 1 1 1
Manual Shut O Valve, 1 1/2” 11-0458 1 1
BTC Staging Control, 2 Stage 14-0306 1 1 1 1 1
50
BTC Staging Control, 4 Stage 14-0307 1 1 1 1 1
10K Temperature Sensor 14-0325 3 3 3 3 3 3 3 3 3 3
NS
Outdoor Sensor 14-0319 1 1 1 1 1 1 1 1 1 1
51 Flame Sensor, UTC 1003 Ignition Module 16-0059 1 1 1 1 1 1 1 1 1 1
Alarm Board, (CSD-1) 16-0023 1 1 1 1 1 1 1 1 1 1
NS
Harness Kit (includes J1, J2, J4, J6, J7 & J9) 40-0265K 1 1 1 1 1 1 1 1 1 1
J3 RH Side 4 Stage Harness 40-0268 1 1 1 1 1
J5 Blower/Vent 4 Stage Harness 40-0271.2 1 1 1 1
J8 Stage Control (2 Stage) Harness 40-0274 1 1 1 1 1
J8 Stage Control (4 Stage) Harness 40-0275 1 1 1 1 1
J10 Alarm Non-CSD-1 Harness 40-0277 1 1 1 1 1 1 1 1 1 1
52 Spark Generator 16-0036 1 1 1 1 1 1 1 1 1 1
Transformer, 50 VA 15-0007 1 1 1 1 1
53
Transformer, 75 VA 15-0008 1 1 1 1 1
NS Pump Time Delay Relay 15-0120 1 1 1 1 1 1 1 1 1 1
NS Low Gas Pressure Switch (Manual Reset) 11-0410 1 1 1 1 1 1 1 1
NS High Gas Pressure Switch (Manual Reset) 11-0411 1 1 1 1 1 1 1 1
Main Board Assembly (2 Stage) 70-2925R 1 1 1 1 1 1 1 1 1 1
54
Main Board Assembly (4 Stage) 70-2926R 1 1 1 1 1
2 Stage Relay Board (prior to 0105)
(includes timer board & relays)
4 Stage Conversion Kit (prior to 0904) 21-0251 1 1 1 1 1
Relay, 9 Pin (prior to 0904) 15-0115 5 5 5 5 5 7 7 7 7 7
NS
Relay, 4 Pin (prior to 0904) 15-0116 2 2 2 2 2 2 2 2 2 2
NS Relay, 2P (On/O)
(K1, K3, K5, K6, K7, TDR1, TDR3) (300 only)
Relay, 2P (2 Stage)
(K1, K3, K5, K6, K7, TDR1, TDR2, TDR3)
Relay, 2P (4 Stage)
(K1, K3, K5, K6, K7, TDR1, TDR2, TDR3)
Relay, 3P (2 or 4 Stage) (K2, K4) 15-0123 2 2 2 2 2 2 2 2 2 2
NS Solid State Relay 15-0137 1 1 1 1 1 2 2 2 2 2
40-0055R 1 1 1 1 1 1 1 1 1 1
15-0121 5
15-0121 6 6 6 6
15-0121 8 8 8 8 8
43
Finned copper tube gas boilers & water heaters – Boiler Manual
REPAIR PARTS (CONTINUED)
Model Size with Item Quantities Below
Ref # Name of Part Part # 300 400 600 750 900 1050 1350 1500 1950 2100
NS Main Board (blue) 40-0065R 1 1 1 1 1 1 1 1 1 1
NS Timer Board 40-0067 1 1 1 1 1 1 1 1 1 1
NS Ribbon Cable 44-0057 1 1 1 1 1 1 1 1 1 1
NS LED Indicator Board 40-0066 1 1 1 1 1 1 1 1 1 1
Pressure Relief Valve 50# 13-0040 1 1 1 1
NS
Pressure Relief Valve 50# 30-0360 1 1
Pressure Relief Valve 50# 30-0374 1 1
Pressure Relief Valve 50# 30-0379 1 1
Pressure Relief Valve 125# 30-0364 1 1 1 1 1 1 1 1 1 1
Tridicator (DB) 30 - 50 psi 13-0308 1 1 1 1 1 1 1 1 1 1
NS
Tridicator (DB) 60 - 160 psi 13-0305 1 1 1 1 1 1 1 1 1 1
Flow Switch 14-0203 1 1 1 1 1 1 1 1 1 1
NS
Flow Switch (Outdoor) 14-0205 1 1 1 1 1 1 1 1 1 1
Flow Switch (Potter) Optional 14-0201 1 1 1 1 1 1 1 1 1 1
Flow Switch (Outdoor Potter) (Optional) 14-0202 1 1 1 1 1 1 1 1 1 1
NS On/O Switch 48-0010 1 1 1 1 1 1 1 1 1 1
NS 2 Amp Fuse 48-0379 2 2 2 2 2 2 2 2 2 2
NS Rating Plate 82-0054 1 1 1 1 1 1 1 1 1 1
NS Overlay 2 Stage 82-0158 1 1 1 1 1
NS Overlay 4 Stage 82-0159 1 1 1 1 1
NS Silicone 66-0151 1 1 1 1 1 1 1 1 1 1
Silicone Tubing 06-0051 per foot
NS
Vent Termination Hood 6” 09-0112 1 1
Vent Termination Hood 7” 09-0140 1
Vent Termination Hood 8” 09-0113 1
Vent Termination Hood 10” 09-0115 1 1
Vent Termination Hood 12” 09-0116 1
Vent Termination Hood 14” 09-0141 1 1 1
Air Intake Hood 6” 09-0102 1 1
NS
Air Intake Hood 8” 09-0103 1 1
Air Intake Hood 10” 09-0104 1 1
Air Intake Hood 12” 09-0105 1 1 1 1
Barometric Damper 6” 09-0405 1 1
NS
Barometric Damper 7” 09-0409 1
Barometric Damper 8” 09-0404 1
Barometric Damper 10” 09-0403 1 1
Barometric Damper 12” 09-0401 1
Barometric Damper 14” 09-0402 1 1 1
NS Rack Assembly
70-2886 1 1
70-2888 1 1
70-2889 1
70-2890 1
70-2892 1 1
70-2894 1 1
44
Finned copper tube gas boilers & water heaters – Boiler Manual
START UP FORM
Date of Start Up: Job Name:
Model #: Serial Number #:
Boiler Model: Dominator LCD Company Name
Fuel Type: Natural Gas Propane Tech Name
System Type: Hydronic Domestic Phone Number
PRE-START UP CHECK LIST
ANY VISUAL DAMAGE TO UNIT? INLET FILTER INSTALLED AND CLEAN?
PIPING PROPERLY CONNECTED? ALL WIRING CONNECTED PROPERLY?
SYSTEM FLOODED AND FLOWING? BOILER PUMP PUMPING INTO INLET?
BOILER CIRCULATOR WIRED? COMBUSTION AIR PROVIDED?
VENT/STACK CONNECTED? PROPER SERVICE CLEARANCE PROVIDED?
IS VENT VERTICAL THROUGH THE ROOF? OUTDOOR AIR SENSOR INSTALLED/WIRED?
IS VENT THROUGH THE WALL? ARE UNITS RACKED?
IS POWER VENT INSTALLED AND WIRED? IS RACK ASSEMBLED TIGHTLY?
SEALED COMBUSTION? NO HOLES SCREWED INTO CABINET?
ELECTRICAL/WIRING/CONTROL
Boiler Supply Voltage External BMS System
Boiler Pump Supply Voltage Utilize Boiler BTC For Control
Voltage Down Stream of Transformer
BTC CONTROL SET UP: (Not all settings are used for every mode. (Dominator Series Only))
: Mode : Boiler Max : Purge DT
: Boiler Target : Boiler Min
: Tank Target : Boiler Diff LCD ONLY
: Tank Diff : Intr-Stg Diff : Operator (STG1)
: Outdoor Start : Intr-Stg On Dly :
: Boiler Start : Intr-Stg Off Dly : High Limit
: Pump Purge
High Operator (STG 2)
45
Finned copper tube gas boilers & water heaters – Boiler Manual
COMBUSTION/SAFETY REPORT
FACTORY FIRE TEST REPORT: Low Fire High Fire
Manifold Gas Pressure: "WC"
Air Differential Pressure: "WC"
These results are afxed
to the side of the heater
on a small white label.
FIELD TEST REPORT IN STAGE: 1 2 3 4
Manifold Gas Pressure: "WC"
Air Differential Pressure: "WC"
Pilot Manifold Pressure: "WC"
CO2:
Stack Temp. (Net):
Efciency @ °F Inlet Temp.
CO (PPM):
O2:
Stack Draft (Must Be Negative):
Pilot Signal:
SAFETY CONTROL CHECK:
Wired and Operating
Properly @ Setting:
Failed To Operate
Comment To Right Comments
Low Water Cut Off (PPM):
Factory Flow Switch
Operating Control
High Limit
Differential Air Switch STG. 1, 2
Differential Air Switch STG. 3, 4
Blocked Flu Switch
Flame Failure Lockout (CSD-1)
Pump Delay
Combustion Air Damper
Power Vent Proving Switch
Barometric Damper
COMMISSIONING THE UNIT
Customer Instructed? Yes No
All Covers Replaced? Yes No
Wiring Secure/Tight? Yes No
Customer Given Manual? Yes No
Cabinet Air Leaks? Yes No
Gas Leaks Detected? Yes No
Unit Cycled Min. of 15 X? Yes No
Temp. Set Per Customer? Yes No
Left Maintenance Instruction? Yes No
Commissioned By:
(Signature)
Date:
46
The delta T between the heaters inlet and outlet
is critical to proper ow. Before you leave the
job site you must record the delta T. This reading
should not exceed 35°F, 19.4°C or be lower than
20°F, 11.1°C.
Inlet Temperature
Outlet Temperature
Finned copper tube gas boilers & water heaters – Boiler Manual
Commonwealth of Massachusetts
NOTICE!
Installation Requirements MACODE-3
In the Commonwealth of Massachusetts, the installa-
tion must be performed by a licensed plumber or gas
tter.
1. For all side wall horizontally vented gas fueled equipment
installed in every dwelling, building or structure used in whole
or in part for residential purposes, including those owned or
operated by the commonwealth and where the side wall exhaust
vent termination is less than seven (7) feet above nished grade,
in the area of the venting, including but not limited to decks and
porches, the following requirements shall be satised:
d. INSTALLATION OF CARBON MONOXIDE DETECTORS. At the
time of installation of the side wall horizontal vented gas
fueled equipment, the installing plumber or gastter shall
observe that a hard wired carbon monoxide detector with an
alarm and battery back-up is installed on the oor level
where the gas equipment is to be installed. In addition, the
installing plumber or gastter shall observe that a battery
operated or hard wired carbon monoxide detector with an
alarm is installed on each additional level of the dwelling,
building or structure served by the side wall horizontal
vented gas fueled equipment. It shall be the responsibility of
the property owner to secure the services of qualied
licensed professionals for the installation of hard wired
carbon monoxide detectors.
i. In the event that the side wall horizontally vented gas
fueled equipment is installed in a crawl space or an attic,
the hard wired carbon monoxide detector with alarm and
battery back-up may be installed on the next adjacent
oor level.
ii. In the event that the requirements of this subdivision can
not be met at the time of completion of installation, the
owner shall have a period of thirty (30) days to comply
with the above requirements; provided, however, that
during said thirty (30) day period, a battery operated
carbon monoxide detector with an alarm shall be
installed.
e. APPROVED CARBON MONOXIDE DETECTORS. Each carbon
monoxide detector as required in accordance with the above
provisions shall comply with NFPA 720 and be ANSI/UL 2034
listed and IAS certied.
f. SIGNAGE. A metal or plastic identification plate shall be
permanently mounted to the exterior of the building at a
minimum height of eight (8) feet above grade directly in line
with the exhaust vent terminal for the horizontally vented gas
fueled heating appliance or equipment. The sign shall read,
in print size no less than one-half (1/2) inch in size, “GAS VENT
DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS”.
g. INSPECTION. The state or local gas inspector of the side wall
horizontally vented gas fueled equipment shall not approve
the installation unless, upon inspection, the inspector
observes carbon monoxide detectors and signage installed
in accordance with the provisions of 248 CMR 5.08(2)(a)1
through 4.
Improper venting can result in excessive levels of
carbon monoxide which can cause severe personal
injury or death!
2. Exemptions — The following equipment is exempt from
248 CMR 5.08(2)(a) 1 through 4:
a. The equipment listed in Chapter 10 entitled “Equipment
Not Required To Be Vented” in the most current edition of
NFPA 54 as adopted by the Board; and
b. Product Approved side wall horizontally vented gas
fueled equipment installed in a room or structure
separate from the dwelling, building or structure used in
whole or in part for residential purposes.
3. MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING
SYSTEM PROVIDED.
a. When the manufacturer of Product Approved side wall
horizontally vented gas equipment provides a venting
system design or venting system components with the
equipment, the instructions provided by the manufacturer
for installation of the equipment and the venting system
shall include:
i. Detailed instructions for the installation of the venting
system design or the venting system components; and
ii. A complete parts list for the venting system design or
venting system.
4. MANUFACTURER REQUIREMENTS – GAS EQUIPMENT VENTING
SYSTEM NOT PROVIDED.
a. When the manufacturer of a Product Approved side wall
horizontally vented gas fueled equipment does not provide
the parts for venting the ue gases, but identies “special
venting systems”, the following requirements shall be
satised by the manufacturer:
i. The referenced “special venting system” instructions
shall be included with the appliance or equipment
installation instructions; and
ii. The “special venting systems” shall be Product
Approved by the Board, and the instructions for that
system shall include a parts list and detailed installation
instructions.
5. A copy of all installation instructions for all Product Approved
side wall horizontally vented gas fueled equipment, all
venting instructions, all parts lists for venting instructions,
and/or all venting design instructions shall remain with the
appliance or equipment at the completion of the installation.
Improper venting can result in excessive levels of
carbon monoxide which can cause severe personal
injury or death!
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LIMITED WARRANTY
Boilers/Water Heaters
Industrial, Commercial and Other Non-Residential Use
e “Manufacturer” warrants to the original owner at the original installation site that the heat exchanger of the Industrial, Commercial, and other
Non-Residential Use Boiler (the “Product”) will be free from defects in material or workmanship for ten (10) years from the date of installation.
Additional twenty one (21) year thermal shock warranty on heat exchanger. If upon examination by the Manufacturer the Product is shown to
have a defect in material or workmanship during the warranty period, the Manufacturer will repair or replace, at its option, that part of the Product
which is shown to be defective. All other RBI supplied Boiler/Water Heater parts are warranted against defects in material and workmanship for
one (1) year from date of installation or 18 months from date of shipment from RBI.
e “Manufacturer” warrants to the original owner at the original installation site that the heat exchanger of the Industrial, Commercial, and other
Non-Residential Use Water Heater (the “Product”) will be free from defects in material or workmanship for five (5) years from the date of
installation. Additional twenty one (21) year thermal warranty on heat exchanger. If upon examination by the Manufacturer the Product is shown
to have a defect in material or workmanship during the warranty period, the Manufacturer will repair or replace, at its option, that part of the
Product which is shown to be defective. All other RBI supplied Boiler/Water Heater parts are warranted against defects in material and
workmanship for one (1) year from date of installation or 18 months from date of shipment from RBI.
is limited warranty does not apply:
(a) if the Product has been subjected to misuse or neglect, has been accidentally or intentionally damaged, has not been installed,
maintained or operated in accordance with the furnished wrien instructions, or has been altered or modied in any way.
ese include but not limited to:
• Excessive water hardness causing a lime build-up in the heat exchanger tubes is not a fault of the equipment and is not covered
under the manufacturer’s warranty.
• Excessive piing and erosion on the inside of the heat exchanger tubes caused by high water velocity through the tubes and
is not covered by the manufacturer’s warranty. (See Installation Instructions for proper pump performance.)
• Chemical corrosion, no corrosive chemical (freon, dry cleaning chemicals, degreasing liquids, chlorine or any chemicals that
produce hydrochloric acid) can be present in the boiler room as it rapidly destroys the heating equipment and voids the warranty.
• All copper n boilers should not operate with a return water temperature less than 110°F, 43°C atmospheric combustion, 125°F, 52°C fan
assist combustion. If a lower temperature is required, an external bypass should be installed to prevent condensation. e manufacturer’s
warranty does not cover damage done by condensation.
(b) to any expenses, including labor or material, incurred during removal or reinstallation of the Product or parts thereof.
(c) to damage as a result of selement, distortion, collapse, or cracking of any foundation area, beams or pipes surrounding the Product.
(d) to any workmanship of any installer of the Product; or to Products installed outside the continental United States or Canada.
is limited warranty is conditional upon:
(a) shipment, to the Manufacturer, of that part of the Product thought to be defective. Goods can only be returned with prior wrien approval from
the Manufacturer. All returns must be freight prepaid.
(b) determination in the reasonable opinion of the Manufacturer that there exists a defect in material or workmanship.
Repair or replacement of any part under this Limited Warranty shall not extend the duration of the warranty with respect to such repaired
or replaced part beyond the stated warranty period.
THIS LIMITED WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EITHER EXPRESS OR IMPLIED, AND
ALL SUCH OTHER WARRANTIES, INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE HEREBY DISCLAIMED AND EXCLUDED
FROM THIS LIMITED WARRANTY. IN NO EVENT SHALL THE MANUFACTURER BE LIABLE IN ANY WAY FOR
ANY CONSEQUENTIAL, SPECIAL, OR INCIDENTAL DAMAGES OF ANY NATURE WHATSOEVER, OR FOR ANY
AMOUNTS IN EXCESS OF THE SELLING PRICE OF THE PRODUCT OR ANY PARTS THEREOF FOUND TO BE
DEFECTIVE. THIS LIMITED WARRANTY GIVES THE ORIGINAL OWNER OF THE PRODUCT SPECIFIC LEGAL
RIGHTS. YOU MAY ALSO HAVE OTHER RIGHTS WHICH MAY VARY BY EACH JURISDICTION.
260 North Elm Street 7555 Tranmere Drive
Westeld, MA 01085 Mississauga, Ontario L5S 1L4 Canada
Phone: (413) 568-9571 Phone: (905) 670-5888
Fax: (413) 568-9613 Fax: (905) 670-5782
www.rbiwaterheaters.com
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