RBI MW-500, MW-1250, MW-750, MW-1000, MW-1500 Installation & Operation Manual

...
FTIII-IOM-1
FUTERA III SERIES FINNED COPPER
GAS BOILERS (MODEL MB)
& WATER HEATERS (MODEL MW)
INSTALLATION & OPERATION MANUAL
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,
WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, 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 appliance.
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 neighbor’s phone. 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.
WARNING: Failure to properly vent this unit can cause excessive amounts of carbon monoxide resulting in severe personnal injury or death!
1103 kPa
WATER.
INSTALLER, THESE INSTRUCTIONS TO BE AFFIXED ADJACENT TO THE BOILER / WATER HEATER.
CONSUMER, RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE PURPOSES.
260 North Elm Street 1300 Midway Boulevard Westfield, MA 01085 Phone: (413) 568-9571 Phone: (905) 670-5888 Fax: (413) 568-9613 Fax: (905) 670-5782
Mississauga, Ontario L5T 2G8 Canada
www.rbiwaterheaters.com
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
AVERTISSMENT. 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.
CONTENTS
Before Your Start page 2 Ratings & Capacities page 3 Boiler/Water Heater Location page 3 Combustion Air & Ventilation page 3 General Venting Guidelines page 5 Common Vent Systems page 11 General Piping Requirements page 12 Heating System Piping page 13 Domestic Water Supply Piping page 17 Gas Supply Piping page 21 Electrical Wiring page 22 General Operation page 22 Operating Instructions page 23 Checking & Adjustments page 25 Control Description page 26 MPA Staging Control page 26 Diagnostics page 27 Maintenance page 28 Trouble-Shooting page 30 Repair Parts page 31
Startup Sheet page 37
BEFORE YOU START
This manual covers the application, installation, operation and maintenance of a Futera III Series finned copper heating boiler/water heater.
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 Futera III 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 ANSI­Z21.10.3/CSA 4.3, Gas Water Heaters, ANSI-Z21.13/CSA
4.9, Gas-Fired Low Pressure Steam and Hot Water Boilers and CAN1-3.1, Industrial and Commercial Gas Fired Packaged Boilers. Each unit has been constructed and hydrostatically tested for a maximum working pressure of 160 psi, 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.
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 RBI’s instruction sheet MA IOM. If you don’t have a copy call your RBI representative.
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 at: 260 North Elm Street, Westfield, MA 01085 for US or 1300 Midway Boulevard, Mississauga ONT L5T 2G8 for Canada. Always include the model and serial numbers from the rating plate of the boiler/water heater in question.
1103 kPa
in accordance with Section IV of the
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FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
RATINGS & CAPACITIES
Before undertaking the installation of the Futera III Series boiler/water heater check the rating plate to ensure that the unit has been sized properly for the job. The “Net I=B=R Ratings” specify the equivalent amount of direct cast iron 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 availability 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 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.
NOTE: Service clearances are not mandatory, but are recommended to ensure ease of service should it be required.
Table 1
Clearance to Service
Combustibles Clearance
in
To p 6 Back 6 Left Side 6 Right Side 6 Front 6
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.
NOTE: The Futera III may be installed directly on combustible 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 it to a negative pressure, see “GENERAL VENTING GUIDELINES”.
mm 153 153 153 153 153
in 30 24 12 12 30
mm 762 610 306 306 762
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 12.
WARNING: 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!
COMBUSTION AIR & VENTILATION
WARNING: 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 CAN/ CGA 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!
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!
CAUTION: 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!
CAUTION: 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.
WARNING: Never operate the Futera III in an environment subjected to a negative pressure unless it is Direct Vented. Failure to comply with this warning can result in excessive levels of carbon monoxide causing severe personal injury or death!
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FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
All Air From Inside The Building
If the Futera III 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 5, 6 and 7, two permanent openings communicating with an additional room(s) are required. The combined volume of these spaces must have sufficient volume to meet the criteria for an unconfined space. The total 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 in
2
/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
2
,
100 in
64,516 mm
be within 12 in,
76 mm
from, the top of the enclosure. The bottom
opening must be within 12 in, than 3 in,
76 mm
2
in size. The upper opening must
305 mm
of, but not less than 3 in,
305 mm
of, but not less
from, the bottom of the enclosure.
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,
76 mm
less than 3 in,
from, the top of the enclosure. The
bottom opening must be within 12 in, less than 3 in,
76 mm
from, the bottom of the enclosure.
305 mm
305 mm
of, but not
of, but not
Where directly communicating with the outdoors or communicating with the outdoors through vertical ducts, each opening shall have a minimum free area of
2
/4000 Btu/hr,
1 in
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
2
/2000 Btu/hr,
1 in
1100 mm2/kW
of the total input rating
of all of the equipment in the enclosure.
Table 2 – Make-up Air Louver Sizing
Required Cross Sectional Area
in
6.4 mm
2
cm 806 1206 1613 2019 2419 2819 3226
Input 1/4 in
(MBH) Wire Screen Metal Louvers Wooden Louvers
500 125 750 187 1000 250 1250 313 1500 375 1750 437 1999 500
75% Free Area 25% Free Area
2
in 167 250 333 416 500 583 667
2
cm 1077 1613 2148 2684 3226 3761 4303
2
in 500 750 1000 1250 1500 1750 2000
2
2
cm
3226 4839 6452 8065
9677 11,290 12,900
Canadian installations must comply with CSA B149.1 when
air supply
for power draft-assisted
air supply
less than 1 in
is provided by natural air flow from the outdoors
natural draft
opening(s) having a cross-sectional area of not
, partial fan-assisted, fan-assisted, or
burners
2
per 7,000 Btuh
, there shall be a permanent
(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.
Intake Air Option – General Guidelines
This configuration provides combustion air directly to the boiler/water heater’s air intake using a dedicated pipe when using the direct vent option. The RBI air intake adapter must be fitted to the blower inlet. Combustion air can be drawn in horizontally through the same outside wall which terminates the exhaust gases or vertically through the roof, see Figures 1, 2, 3 & 4.
WARNING: 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, flexible aluminum pipe, PVC or CPVC pipe can be used for the intake air pipe. It must be sized per Table 3.
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,
6.4 mm
. If the free area through a louver or grill is
not known, ducts should be sized per Table 2.
Table 3 - Intake Air Pipe Sizing
Model For Vertical For Horizontal
Size (Up to 60') (Up To 60')
in
500 8 750 8 1000 8 1250 10 1500 10 1750 12 2000 12
mm 203 203 203 254 254 305 305
in
6 6 6 8
10 12 12
mm 152 152 152 203 254 305 305
All joints in metal intake air systems must be secured using corrosion resistant fasteners and sealed using a suitable Silicone caulk. If PVC or CPVC is used, the joints must be cleaned with a suitable solvent and connected using a solvent based PVC cement. The combustion air system
MUST be supported by the building structure not the boiler/water heater.
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FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
CAUTION: A combustion air damper interlocked with the unit should be installed in the intake air pipe when the infiltration of subfreezing air could occur, otherwise the unit could freeze up voiding the warranty!
Intake Air Option – Vertical Guidelines
The maximum equivalent length for the vertical intake air pipe is 60 ft, air terminal are equal to 10 linear ft, Table 3.
An approved, nonrestrictive intake air terminal must be used. The intake air terminal must terminate as shown in Figure 3. The penetration point in the roof must be properly flashed and sealed.
Intake Air Option – Horizontal Guidelines
The maximum equivalent length for the horizontal intake air pipe is 60 ft, terminal are equal to 10 linear ft, runs exceed 5 ft
0.9 m
intervals with overhead hangers. The certified intake air terminal from RBI must be used, see Figures 1, 2 and 4.
18.3 m
18.3 m
. Each 90˚ elbow and the intake
3.0 m
of pipe, see
. Each 90˚ elbow and the intake air
3.0 m
of pipe. If horizontal
1.5 m
they must be supported at 3 ft,
GENERAL VENTING GUIDELINES
WARNING: The vent installation must be in accordance with Part 7, Venting of Equipment, of the National Fuel Gas Code, ANSI Z223.1/NFPA 54­latest revision or applicable provisions of the local building codes. Canadian installations must comply with CAN/CGA 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 fire-stops must be used where required.
VENT SYSTEM OPTIONS
The Futera III may be vented the following ways:
1) Direct Vent, Positive Pressure, Category IV uses a
vent system certified to UL 1738 for installations in the United States, ULS636 for installations in Canada. Combustion air is piped from the outdoors to the blower inlet.
2) Side Wall Vent, Positive Pressure, Category IV uses
a vent system certified to UL 1738 for installations in the United States, ULS636 for installations in Canada. Combustion air is obtained from the space in which the unit is installed.
Vertical/Chimney Vent, Negative Pressure, Category II
3) uses an approved metal chimney system.
NOTE: All venting, combustion air material supplied by installer.
WARNING: Common vent systems must be properly engineered and sized to provide a negative draft of 0.1 in, 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!
2.5 mm
W.C. at the flue
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FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
DIRECT VENT, POSITIVE PRESSURE, CATEGORY IV
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 Intake Air Option instructions under the “COMBUSTION AIR & VENTILATION” section must be followed! The vent system must be sized per Table 4.
Table 4 – Category IV
Model Pipe Diameter
Size (Up to 60')
in
500 5 750 5 1000 6 1250 6 1500 8 1750 10 2000 10
Horizontal Direct Vent Systems – Figures 1 & 2
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 pipe
18.3 m
is 60 ft, equal to 10 linear ft, wall metal vent system passes through an unheated space, it must be insulated with insulation rated for 400° F, Structrual penetrations must be made using approved fire­stops. For best results, horizontal vent systems should be as short and straight as possible.
. Each 90˚ elbow and the vent terminal are
3.0 m
of pipe. If any part of a single
mm 127 127 152 152 203 254 254
204°C
Horizontal vent systems shall terminate at least 4 ft,
1.2 m
below, 4 ft,
0.30 m
any building. It must not terminate less than horizontally from, and in no case above or below, unless a 4 ft, meters, gas meters, regulators and relief equipment and not less than 7 ft, The bottom of the vent terminal(s) shall be located at least 5 ft, there is a minimum 5 ft, between them. Avoid terminal locations likely to be affected by winds, snowdrifts, people and pets. Protect building materials and vegetation from degradation caused by the flue gases.
Vertical Direct Vent Systems – Figure 3
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, must be made using approved fire-stops.
An approved, nonrestrictive vent terminal must be used. The top of a vertical vent system must extend at least
5
line that it passes through, 4 ft, terminal, see Figure 3.
In addition the vent system must conform to the dimensions shown in Figure 3. The penetration point in the roof must be properly flashed and sealed.
.
The vent system must be gas tight. All seams and joints in metal pipes must be joined and sealed in accordance with the vent system manufacturer’s instructions.
above any door, window or gravity air inlet into
1.2 m
horizontal distance is maintained, from electric
1.5 m
1
/2 ft,
1.7 m
above the roof surface and maximum snow
1.2 m
horizontally from or 1 ft,
2.1 m
from any adjacent public walkway.
above the air intake terminal(s) unless
1.5 m
horizontal separation
204°C
. Structural penetrations
1.2 m
above the intake air
4 ft, 1.2 m
The vent system must be both gas tight and watertight. All seams and joints in metal pipes must be joined and sealed in accordance with the vent system manufacturer’s instructions.
1.5 m
When horizontal vent runs exceed 5 ft,
0.9 m
supported at 3 ft, The vent system must be pitched down, toward the vent terminal, 1/4 in/ft, vent system passes through an unheated space it must be insulated with insulation rated for 400˚F,
intervals with overhead hangers.
20 mm/m.
If any part of a single wall metal
they must be
204°C
.
Combination Direct Vent Systems – Figure 4
The boiler/water heater can be vented vertically with the intake air piped horizontally through an outside wall. Follow the instructions in the Intake Air Option – Horizontal Guidelines on page 5. Also follow the general instructions in the “COMBUSTION AIR & VENTILATION” and “GENERAL VENTING GUIDELINES” sections.
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FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
Figure 1– Horizontal Air Intake and Venting for a Single Direct Vent System
4 FT
1.2 m
1/4 IN. PER FOOT
20 mm/m
3 FT 0.9 m
16 FT 4.9 m
5 FT 1.5 m
1.5 FT 0.5 m
5 FT 1.5 m
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 differences due to prevailing winds. In cold climates, double-wall or insulated inlet pipe recommended to prevent condensation.
Figure 2 – Horizontal Air Intake and Venting for Multiple Direct Vent Systems
MBH 500 TO 1000 1001 TO 2000
2001 TO 4000
4001 & LARGER
kW 146 TO 293 293 TO 586
586 TO 1172
1172 & LARGER
FT m
5 1.5 10 3.1 15 4.6
20 6.1
5 FT 1.5 m
2 IN. 5.0 cm
1.5 FT 0.5 m
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FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
Figure 3 - Vertical Air Intake and Venting for Direct Vent System
4 FT
1.2 m
1.5 FT
0.5 m
10 FT 3.1 m
5 1/2 FT
1.7 m
Figure 4 – Combination Direct Vent Systems
3 FT. 1 m
5 FT
1.5 m
10 FT. 3.1 m
1.5 FT. .5 m
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FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
SIDE WALL VENT, POSITIVE PRESSURE, CATEGORY IV
In this configuration the boiler/water heater blower is used to push the flue products horizontally to the outdoors, see Figure 5. The air for combustion is taken from the space in which the unit is installed. The applicable instructions under the “COMBUSTION AIR & VENTILATION” section must be followed! The vent guidelines under the Horizontal Direct Vent Systems section must also be followed.
VERTICAL/CHIMNEY VENT, NEGATIVE PRESSURE, CATEGORY II
The Futera III is listed as a Category II appliance when vented vertically into a listed metal chimney system, Figures 6 & 7. The chimney must provide a negative pressure not greater than 0.15 in, boiler/water heater flue collar with the unit running. A barometric damper must be installed between the flue collar and the vent connector when negative pressures exceed 0.15 in,
NOTE: When using a listed metal chimney system the chimney system manufacturer’s instructions must be followed.
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.
3.8 mm
W.C.
3.8 mm
W.C. at the
WARNING: 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!
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.
Table 5 - Equivalent Breeching & Chimney Size,
Negative Pressure
Model Size Pipe Diameter
500 6 750 6 1000 7 1250 8 1500 8 1750 10 2000 10
Note: These sizes are based on a 20 ft,
in
6.1m
chimney height.
mm 152 152 178 203 203 254 254
Figure 5 – Side Wall Venting
1.5 FT 0.5 m
4 FT
1.2 m
3 FT
0.9 m
1/4 IN. PER F00T 20 mm/m
24"
0.6 m
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FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
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 single wall stainless steel vent pipe the same diameter as the flue collar to connect the boiler/water heater to a masonry chimney. When using a listed 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,
21 mm/m
. On masonry chimneys the connector must terminate flush with the inside of the chimney flue, Figure 7. Fasten each single wall vent connection with at least 3 corrosion resistant sheet metal screws.
Figure 6 – Vertical Venting with a Metal Chimney System
Always provide a minimum clearance of 6 in,
152 mm
between single wall vent pipe and any combustible materials.
WARNING: 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!
10 FT. 3.1 m
24"
.6 m
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FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
Figure 7 – Vertical Venting using a Lined Masonry Chimney
24"
.6 m
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 fonction­nent 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 deficiencies which could cause an unsafe condition.
Inspecter de façon visuelle le système d’évacu-ation pour déterminer la grosser et l’inclinaison horizontale qui conviennent 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 fireplace 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. Mettre en marche les sécheuses, tous les appareils non raccordés au système d’évacuation commun et tous les ventilateurs d’extraction comme les hottes 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.
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FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
d) Place in operation the appliance being inspected. Follow
the lighting instructions. Adjust thermostat so appliance will operate continuously.
Mettre l’appareil inspecté en marche. Suivre les instructions d’allumage. Régler le thermostat de façon que l’appareil fonctionne de façon continue.
e) Test for spillage at the draft hood relief opening after 5
minutes of main burner operation. Use the flame of a match or candle, or smoke from a cigarette, 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 flamme d’une allunette ou d’une chandelle ou la fumée d’une cigarette, d’un cigare ou d’une pipe.
f) After 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, fireplace dampers and any other gas-burning appliance to their previous condition of use.
Une fois qu’il a été d éterminé, selon la métode indiquée ci-dessus, que chaque appareil raccordé au système d’évacuation est mis à l’air libre de façor adéquate. Remettre 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 CAN/ CGA-B149. Si la grosseur d’une section du système d’ évacuation doit étré modifiée, le système devrait étré modifié 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
CAUTION: Improper piping of this boiler/water heater will void the manufacturer’s warranty and can cause boiler failure resulting in flooding and extensive property damage! Excessive water hardness causing scaling in the copper heat exchanger tubes is NOT covered under the manufacturer’s warranty, see Table
7. Excessive pitting 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 flow rates, see Table 7. Return water
52°C
temperatures below 125˚F, exchanger damage from excessive condensation voiding the manufacturer’s warranty, see Primary / Secondary Piping, Figure 9.
NOTE: Shut off valves and unions should be installed at the inlet and outlet connections of the boiler/hot water heater to provide for isolation of the unit should servicing be necessary.
Freeze Protection
Installations in areas where the danger of freezing exists are not recommended unless proper freeze protection is provided. The following precautions MUST be observed:
1. A continuous flow of water through the unit MUST be maintained! The pump responsible for flow 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. The pump must be capable of producing a minimum of 15% more flow 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 unit must be shut off for any reason the electric, gas and water supplies MUST be shut off and the unit and its pump completely drained.
Relief Valve
Pipe the discharge of the pressure relief valve as shown in Figure 8.
WARNING: 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
The flow switch supplied with the boiler/water heater must be wired to the terminal strip in the control panel to prevent the boiler from firing unless there’s adequate water flow through the unit. The flow switch must be installed in the supply piping adjacent to the boiler outlet connection.
will result in heat
CAUTION: Failure to properly install the flow switch may result in damage to the boiler/water heater heat exchanger voiding the warranty!
12
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
Figure 8 – Futera III Piping
HEATING SYSTEM PIPING
General Piping Requirements
All heating system piping must be installed by a qualified technician in accordance with the latest revision of the ANSI/ASME Boiler and Pressure Vessel Code, Section IV, and 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, heating system pipes and all combustible construction. All heating system piping must be supported by suitable hangers not the boiler. The thermal expansion of the system must be considered when supporting the system. A minimum system pressure of 12 psig, be maintained.
Heating Boiler Piping Connections
The supply and return connections should be sized to suit the system, see Table 6.
Table 6 – Supply & Return Pipe Sizing
Model Size Supply Size Return Size 500 thru 1000 2" NPT 2" NPT 1250 thru 2000 2 1/2" NPT 2 1/2" NPT
25 mm
must be maintained between
82.7 kPa
must
Pump Requirements
This low mass boiler requires a continuous minimum water flow for proper operation. The 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 figures. The temperature rise across the boiler must never exceed 35˚F, pump delay turns the pump on each time the burner fires and runs the pump for 20 to 600 seconds after the call for heat is satisfied.
CAUTION: A temperature rise outside of the range listed in Table 7 indicates that the flow rate through the heat exchanger is incorrect which will damage the heat exchanger voiding the warranty! The maximum allowable temperature rise is 35°F,
The maximum allowable flow rate through a Futera III boiler is 97 GPM, and 136 GPM, The Cupro-Nickel heat exchanger allows for 108 GPM,
6.8 L/s
9.5 L/s
on 500 through 1000 models and 151 GPM,
on 1250 through 2000 models.
6.1 L/s
8.6 L/s
on 500 through 1000 models
for 1250 through 2000 models.
19.4˚C
. The adjustable
19.4°C
.
13
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
Table 7 - Temperature Rise Table
T = 20°F
Model Flow Rate Pres. Drop
Number GPM Ft
500 42.5 0.53
750 63.8 1.57 1000 85.0 3.44 1250 106.3 2.11 1500 127.5 3.57
T = 25°F
Model Flow Rate Pres. Drop
Number GPM Ft
500 34.0 0.35
750 51.0 1.04 1000 68.0 2.27 1250 85.0 1.40 1500 102.0 2.36 1750 119.0 3.67 2000 136.0 5.39
T = 30°F
Model Flow Rate Pres. Drop
Number GPM Ft
750 42.5 0.74 1000 56.7 1.62 1250 70.8 1.00 1500 85.0 1.68 1750 99.2 2.62 2000 113.3 3.84
T = 35°F
Model Flow Rate Pres. Drop
Number GPM Ft
750 36.4 0.56 1000 48.6 1.22 1250 60.7 0.75 1500 72.9 1.27 1750 85.0 1.97 2000 97.1 2.89
T = 11.1°C
Flow Rate Pres. Drop
L/s kPa
2.7 1.5
4.0 4.6
5.4 10.1
6.7 6.2
8.0 10.5
T = 13.9°C
Flow Rate Pres. Drop
L/s kPa
2.1 1.0
3.2 3.1
4.3 6.7
5.4 4.1
6.4 7.0
7.5 10.8
8.6 15.9
T = 16.7°C
Flow Rate Pres. Drop
L/s kPa
2.7 2.2
3.6 4.8
4.5 2.9
5.4 5.0
6.3 7.7
7.2 11.3
T = 19.4°C
Flow Rate Pres. Drop
L/s kPa
2.3 1.6
3.1 3.6
3.8 2.2
4.6 3.7
5.4 5.8
6.1 8.5
Low Water Cutoff
If a boiler is installed above any radiation elements it must be fitted with a low water cutoff device.
Refer to the wiring diagram supplied with the boiler/water heater for proper wiring connections.
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 flow rates or
52˚C
return water temperatures less than 125˚F,
must be
isolated from these systems to protect the boiler.
Variable Water Flows
Figure 9 shows a typical primary/secondary piping system. A dedicated pump is used to maintain a constant water flow through the boiler. This secondary pump is sized to overcome the head loss of the boiler and secondary piping system while supplying the flow rate required to maintain the desired temperature rise across the boiler. The primary pump is sized to provide the required flow to the heating system. The secondary piping connections to the primary system piping must not be more than 12 in,
305 mm
apart to ensure zero pressure drop in the primary system, see Figure 9.
Low Return Water Temperatures
To prevent the problems associated with 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 10. The 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. The 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. The primary and secondary pumps should be sized to provide the required flow through each system. The secondary piping connections to the primary system piping must not be more than 12 in,
305 mm
apart to ensure zero pressure drop in the primary
system, see Figure 10.
Multiple Boiler Systems
Systems using multiple boilers can also be installed using a primary/secondary manifold system, Figure 11.
Piping For Use With Cooling Units
The 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 flow-control valves or some other automatic means of preventing gravity circulation of the boiler water during the cooling cycle.
14
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
Figure 9 - Typical Primary/Secondary Piping System
(See Notes)
1
H-1 Rev 2
Pump
Gate Valve
Globe Valve
Angle Valve
Bufferfly Val ve
Balance Valve
Ball Valve
Motorized Valve
Solenoid
Operated Valve
Self-Operated
Val ve
Figure 10 - Low Temperature Piping
(See Notes and Adjustment Procedures)
1
NOTES:
1. Boiler circuit piping must be sized large enough to handle maximum flow through unit.
2. Boiler pump sized to boiler design flow 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 configuration and valving.
Check with local codes and ordinances for specific requirements.
Pressure
Reducing Valve
Check Valve
Pressure
Relief Valve
Flow Switch
Thermometer
Aquastat Union
Pressure Switch
Gas Pressure
Regulator
H-3 Rev 2
Automatic
Air Vent
Backflow­Prevention
Device
Adjustment Procedure To Maintain Inlet Temperature
Above Dew Point
T1-Temp-Min=110° For Atmospheric
T1-Temp-Min=125° Sealed Combustion
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-M in.
4. Check after system operating temperature has stabilized. Make final adjustments.
5. Follow same adjustment procedure for sealed combustion.
15
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
Figure 11 - Multiple Boiler Piping (See notes)
5
Pump
Gate Valve
Globe Valve
Angle Valve
Bufferfly Val ve
Balance Valve
1
H-15 Rev 2
NOTES:
1. Boiler circuit piping must be sized large enough to handle maximum flow through unit.
2. Boiler pump sized to boiler design flow 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 flow through all units.
Notice: These drawings show suggested piping configuration and valving. Check with local codes and ordinances for specific requirements.
Ball Valve
Motorized Valve
Solenoid
Operated Valve
Self-Operated
Val ve
Pressure
Reducing Valve
Check Valve
Pressure
Relief Valve
Flow Switch
Thermometer
Aquastat Union
Pressure Switch
Gas Pressure
Regulator
Automatic
Air Vent
Backflow­Prevention
Device
16
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
DOMESTIC WATER SUPPLY PIPING
CAUTION: Proper controls 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
49˚C
120˚F,
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. The water heater must not be connected to any heating system piping or components previously used with a non-potable 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.
NOTE: The storage tank must be located as close to the water heater as possible to prevent excessive head loss which will reduce flow.
. Local codes must be complied with!
A cupro-nickel heat exchanger may also be required. The manufacturer should be consulted when these water conditions are encountered. See Table 8A.
CAUTION: Futera III water heater is 97 GPM, 1000 models and 136 GPM, models. The cupro-nickel heat exchanger allows for 108 GPM, 151 GPM, 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 selections. 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.
The maximum allowable flow rate through a
6.8 L/s
9.5 L/s
6.1 L/s
8.9 L/s
for 1250 through 2000
on 500 through 1000 models and
on 1250 through 2000 models, see
on 500 through
Water Chemistry
The 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 corrosion 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.
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.
17
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
Table 8A - Futera III Heat Exchanger Selection Graph
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.
Table 8B - Futera III Pumping Performance Requirement
18
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
Expansion Tank
An expansion tank or other means to control thermal expansion must be installed in the water heating system if back flow prevention devices are installed.
Pump Requirements
This low-mass water heater requires a continuous mini­mum water flow for proper operation. The low water flow switch provided for this unit will shut down the water heater if flow falls below the required minimum level. Table 8B provides the heat exchanger pressure drop chart and temperature rise table. The temperature rise across the
19.4°C
water heater must never exceed 35°F,
Cold Water Supply
The cold water supply must be piped to the water heater’s outlet piping between the water heater and the hot water storage tank. This will prevent untempered water from entering the water heater, see the Temperature Rise Control section below. Two typical water heating systems are shown in Figures 12 & 13.
Temperature Rise Control
Water returned to the water heater inlet must not be less
52˚C
than 125˚F, of combustion will damage the water heater voiding the warranty. The method outlined below can be employed to prevent this condition from occurring.
or excessive condensation of the products
.
A balancing valve should be installed on the outlet side of the water heater for purposes of adjusting the flow rate through the heat exchanger. Thermometers are installed on both the inlet and outlet of the water heater for determining the temperature rise through the unit.
The proper velocity through the water heater must be maintained in accordance with Table 8B for efficient 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 flow rate is too low. Scaling and softening of the heat exchanger will occur.
60°C
60˚C 60˚C
will
Thermostatic Mixing Valve – Water Above 140˚F, Water can be stored at temperatures above 140˚F, 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.
The mixing valve MUST be set to prevent a scald injury from occurring, see the caution against scalding.
Storage of water for domestic use above 140°F, provide an increased quantity of tempered water and help prevent the growth of water born bacteria.
19
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
Figure 12 - Typical Water Heating Piping (MW Models Only)
(See Notes)
3
1
8
4
7
2
Figure 13 - Multiple Water Heating Piping (MW Models Only)
(See Notes)
4
3
6
8
D-1 Rev 4
4
Pump
Valve
Globe Valve
Angle Valve
Bufferfly Valve
Balance Valve
Ball Valve
Motorized Valve
Solenoid
Operated Valve
Self-Operated
Valve
Pressure
Reducing Valve
Check Valve
Pressure
Relief Valve
1
7
2
7
2
6
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 flow.
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.
D-4 Rev 4
Flow Switch
Thermometer
Aquastat Union
Pressure Switch
Gas Pressure
Regulator
Automatic
Air Vent
Temperature &
Pressure
Relief Valve
Vacuum
Relief Valve
Drain Valve
(Typ.)
Notice: These drawings show suggested piping configuration and valving. Check with local codes and ordinances for specific requirements.
20
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
GAS SUPPLY PIPING
WARNING: 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 Z223.1-latest 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!
The Futera III 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.
NOTE: A minimum gas supply pressure of 2 in, W.C. natural or propane and maximum 14 in, W.C.. natural or propane, must be available at the safety shutoff 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 fittings. Table 9 should be used in conjunction with Table 10 to ensure that the gas supply piping has the capacity to meet the demand.
51 mm
356 mm
Table 9 – Gas Pipe Capacity
Maximum pipe capacity in ft3/hr based on 0.60 specific gravity gas at a pressure of 0.5 psig or less and a 0.3" WC pressure drop.
Nominal Iron Pipe Size, (in)
1" 1 1/4" 1 1/2"
2"
Note: Multiply the gas volume by 0.62 for propane flow capacity in ft3/hr.
Multiply the propane flow capacity by 2500 Btu/ft3 to determine the propane Btu/hr capacity for a given pipe size and length.
10
520 1050 1600 3050
20
Maximum gas volume of pipe, (ft
350
730 1100 2100
Pipe length in feet
30
40
285
245
590
500
890
760
1650
1270
50
215 440 670
1270
60
195 400 610
1150
80
170 350 530 990
Table 10 – Equivalent Pipe Length Chart
Nominal Iron Pipe Size, (in)
1"
,
1 1/4" 1 1/2"
2"
Notes: 1. For flow through branch.
90˚ Elbow
2.6
3.5
4.0
5.2
2. For flow at full open.
Type of pipe fitting
1
Te e
Equivalent pipe length, (ft)
5.2
6.9
8.0
10.3
Gate Valve
0.6
0.8
0.9
1.2
2
Figure 14 – Gas Supply Piping
100
3
/hr)
150 305 460 870
Gas Cock
1.5
1.9
2.3
3.0
150
120 250 380 710
2
Figure 14 depicts the proper way to connect the boiler/ water heater to the gas supply piping. The manual shut­off valve MUST be installed in the supply piping. It should
1.5 m
be installed 5 ft,
above the floor where required by local codes. Provide a sediment trap at the bottom 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.
CAUTION: Always use a wrench on the gas valve body when making gas connections to it. Never over-tighten the piping entering the gas valve body or gas valve failure may result!
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 putting the boiler into operation.
21
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
WARNING: Never use an open flame 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, isolate the boiler/water heater by closing it’s manual shut off valve, see Figure 14. If the test pressure is greater than, or equal to 1/2 psig, heater and its individual shut-off valve.
3.5 kPa
, disconnect the boiler/water
3.5 kPa
ELECTRICAL WIRING
Electrical Power Connections
CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation! Verify proper operation after servicing.
ATTENTION: Au moment de l’entretien des commandes, étiquetez tous les fils 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.
The 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 circuit for the boiler/water heater. A properly rated shut-off switch should be located at the boiler/water heater. The 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.
GENERAL OPERATION
WARNING: Before proceeding read and fully understand the instructions contained in this manual. Do not attempt 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!
Should overheating occur or the gas supply fail to shut off, turn off the manual gas control valve to the appliance. Do not interrupt water flow through the boiler/water heater.
En cas de surchauffe 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 fill 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, highest point in the system piping. If a make-up water pump is used adjust it to maintain a minimum 12 psig, 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 off, 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 make­up water valve should be closed and the strainers checked and cleaned.
The system expansion tank should be checked to ensure that the correct water level in the tank is maintained. The tank should be less than half full of water with the system full and adjusted to the correct operating pressure.
82.7 kPa
system pressure is maintained at the
82.7 kPa
Line voltage field wiring of any controls or other devices must conform to the temperature limitation of type T wire
35°C
at 95°F, conductors with a minimum size of #14 awg.
Refer to the wiring diagram supplied with the boiler/water heater for proper wiring connections.
above room temperature. Use copper
Start the boiler as described in the “OPERATING INSTRUCTIONS” section. Run the boiler for at least an hour. The 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 off and open the bleed valves to purge the air trapped in the heating system piping. Close the make­up 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. The system should be checked and bled after three days of operation.
22
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
OPERATING INSTRUCTIONS
FOR YOUR SAFETY READ BEFORE OPERATING.
POUR VOTRE SÉCURITÉ LISEZ AVANT DE METTRE EN MARCHE
A. This 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 OPERATING smell all around the appliance
area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.
DANGER: 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!
FOR YOUR SAFETY
•Have only qualified licensed professionals install, service and maintain this appliance and your gas system in accordance with all applicable codes.
•If you suspect a leak:
1. Have everyone leave the building immediately.
2. Do not attempt 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 fire department.
AVANT DE FAIRE FONCTIONNER, reniflez tout autour de l’appareil pour déceler une odeur de gaz. Reniflez 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.
C. Do not use this appliance if any part has been under
water. Immediately call a qualified 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 qualifié et remplacez toute partie du système de contrôle et toute commande qui ont été plongés dans l’eau.
CAUTION: To prevent being burned, stand clear of the boiler during ignition and don’t touch any hot metal parts!
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 to off or its lowest setting.
3. Turn off all electric power to the appliance.
4. Close manual main shut-off valves 1 and 2 and the pilot gas shut-off valve, Figure 14.
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 five (5) minutes to clear out any gas. Then smell for gas, including near the floor. If you smell gas,
STOP!
Follow “B” in the safety information above (to the left) on this label. If you don’t smell gas, go to the next step.
6. Power appliance and turn the power switch on the side of the boiler to “on”. If all interlocks are properly closed, the display will say “Standby Futera III”. If this is not the case refer to the “DIAGNOSTICS” section for further information.
51 mm
7. A minimum gas supply pressure of 2 in, natural of propane and max 14 in, natural of propane, must be available at the safety shutoff valve inlet with the unit(s) operating.
8. Create a full input demand by jumping the AA terminals on control board at terminal strip J12.
9. The boiler will begin the start sequence.
356 mm
, W.C.
W.C.,
23
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
10. Monitor the flame current on the Honeywell Burner Control 7895C. No flame current should be detected and the 7895C should lock out. If flame current is detected at any time up to the 7895C locking out, the 120V wiring on the ignition transformer must be reversed. Test again to insure that no flame is detected.
WARNING: Improper wiring of the ignition transformer can result in an explosion causing extensive property damage, severe personal injury or death!
11. Open the manual main shut-off valves 1 and 2 and the pilot gas shut-off valve, Figure 14.
12. Reset the Honeywell 7895C. The boiler will begin the start sequence.
13. When the main display reads “PILOT RUNNING” and the flame current is 5 VDC, switch the Honeywell 7895C to the “test” position. This will hold the Honeywell 7895C in its ignition state.
14. Adjust the pilot pressure per the “CHECKING & ADJUSTMENTS”.
15. Switch the Honeywell 7895C back to “run”.
16. Allow the boiler to establish main flame and modulate to full input. Check the input rate per the “CHECKING & ADJUSTMENTS” section.
2. Mettez l’appareil à l’arrêt ou réglez celui-ci au minimum.
3. Coupez toute alimentation électrique de l’appareil.
4. Fermez manuellement les robinets d’arrêt principaux 1 et 2 ainsi que le robinet d’arrêt de la veilleuse. Voir figure 14.
5. Assurez-vous au préalable que la conduite d’alimentation en gaz a été purgée et que tous ses raccords jusqu’au niveau du robinet sont exempts de fuite.
6. Mettez l’appareil sous tension et tournez l’interrupteur situé sur le côté de la chaudière en position de marche. Si tous les interrupteurs de verrouillage sont convenablement fermés, l’affichage doit indiquer «Standby Futera III». Si ce n’est pas le cas, reportez­vous à la section «DIAGNOSTIC».
7. Lorsque l’appareil est en marche, la pression du gaz à l’entrée du robinet d’arrêt de sécurité doit être au mini­mum de 2 po,
51 mm, CE
au maximum de 14 po,
, gaz naturel ou propane et
356 mm, CE
, gaz naturel ou
propane.
8. Créez une nette demande de chauffage au tableau de commandes en posant un cavalier sur les bornes AA (bornier J12).
9. La chaudière entamera la séquence de démarrage.
17. Move the slide switch below the display to “Min Hold”, low fire.
18. Set manifold pressure at elbow before entering cabinet to -2.95" WC (± -.1" WC) at high fire.
19. Allow the boiler to modulate to min input. Observe the burner to ensure that it is not operating in an infrared condition. Take a flue gas sample using a calibrated analyzer. Use a 2.5mm, 3/32" allen wrench to adjust the gas valve to produce a CO
2 of approximately 8.5%
for natural gas and 10.5% for propane. Make small 10­degree adjustments and wait until the CO
2 readings
settle before making further adjustments.
20. When all adjustments are finished, move the slide switch below the display to the “Run” position and remove input by opening jumper AA.
21. The boiler allows for four modes of operation. Refer to the “MPA STAGING CONTROL” for further information.
Consignes d’utilisation
1.
ATTENTION!
vous constatez une anomalie quelconque dans le fonctionnement de l’appareil, suivez les instructions de la section «COMMENT COUPER L’ALIMENTATION DE GAZ DE L’APPAREIL».
Lisez les mises en garde ci-dessus. Si
10. Surveillez le courant de flamme sur le régulateur du brûleur Honeywell 7895C. Aucun courant de flamme ne doit être détecté et le 7895C devrait se verrouiller. Si un courant de flamme est détecté avant le verrouillage du 7895C, le câblage 120V du transformateur d’allumage doit être inversé. Vérifiez à nouveau pour vous assurer qu’aucune flamme n’est détectée.
AVERTISSEMENT: Un câblage incorrect du transformateur d’allumage peut provoquer une explosion entraînant de graves blessures ou la mort et causer d’importants dégâts matériel.
11. Ouvrez manuellement les robinets d’arrêt principaux 1 et 2 ainsi que le robinet d’arrêt de la veilleuse. Voir figure 14.
12. Remettez à zéro le régulateur Honeywell 7895C. La chaudière commencera la séquence de démarrage.
13. Lorsque l’affichage indique ´«PILOT RUNNING» et que le courant de flamme est de 5V c.c., commutez le Honeywell 7895C en mode ´«test». Ceci permettra de le maintenir en position d’allumage.
14. Réglez la pression de la veilleuse tel qu’indiqué à la section «VÉRIFICATION ET RÉGLAGES».
15. Commutez à nouveau le Honeywell 7895C en mode «marche».
24
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
16. Laisser la chaudière compléter la séquence d’allumage et atteindre son plein régime. Vérifiez le débit tel qu’indiqué à la section «VÉRIFICATION ET RÉGLAGES».
17. Déplacez le curseur situé sous l’écran d’affichage, à la position «Min Hold», soit faible régime.
18. Laissez la chaudière atteindre son régime minimum. Observez le brûleur et vérifiez qu’il ne fonctionne pas en infrarouge. Prélevez un échantillon de gaz de com­bustion à l’aide d’un analyseur calibré. Réglez le robinet de gaz au moyen d’une clé Allen de 2,5mm (3/32 po) afin de produire une concentration de CO
2 d’environ
8,5% pour du gaz naturel et de 10,5% pour du gaz propane. Procédez par écarts de 10 degrés et attendez que la lecture du CO
2 se stabilise avant chaque nouveau
réglage.
19. Lorsque tous les réglages ont été effectués, glissez le curseur situé sous l’écran d’affichage à la position «Run» et mettez fin à la demande en retirant le cava­lier des bornes AA.
20. La chaudière offre quatre modes d’opération. Reportez­vous à la section ´«MPA STAGING CONTROL» pour plus de détails.
To Turn Off Gas To Appliance
1. Set the operating control or thermostat to its lowest setting.
2. Turn off all electric power to the appliance if service is to be performed.
3. Close the manual main and pilot gas shut-off valves.
Figure 16 – Spark Rod Position and Pilot Flame
2 5/16 in
58.8 mm
SEE DETAIL A
10 1/8 in
257.2 mm
1/4 to 7/8 OF AN in
6.4 mm TO 22.2 mm
BURNER SURFACE
DETAIL A
FROM TIP TO
RIOM-17-REV-B
Pilot Adjustment
The pilot pressure has been factory set at 2" and shouldn't need adjustment. To check the pilot pressure close the manual main shut-off valve 2 and the pilot gas shut-off valve, Figure 14. Remove the 1/8" pipe plug from the pilot tee and connect a manometer having a minimum range of 6 in,
152 mm
WC to it. Open the pilot gas shut-off valve. With the unit powered, generate a call for heat. When the prepurge is complete the ignition/pilot trial will begin. At this point put the Honeywell 7895C test switch in the test position. The control will hold in the ignition/pilot sequence allowing you to check the pressure.
COMMENT 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.
CHECKING & ADJUSTMENTS
Spark Gap
With the main and pilot gas manual valves in the closed position energize the unit. Observe the trial for ignition to confirm that the spark is strong and continuous. If not check and adjust the spark gap as shown in Figures 15 &16.
Figure 15 – Spark Gap
9 1/4 in.
235 mm
FROM BOTTOM OF SPARK ROD PLATE
1/16 TO 1/8 OF AN in
1.5 mm TO 3.2 mm
To adjust the pilot the following steps must be taken:
1. Remove the pilot gas pressure regulator cap.
2. Turn the pressure regulator adjustment screw clock­wise to increase the pressure and counterclockwise to decrease it.
3. Replace the pressure regulator adjustment screw cap.
CAUTION: Never force the regulator adjustment screw beyond the stop limits or damage to the regulator will occur!
Required Gas Pressure
Provide gas supply pressure at inlet to boiler gas train as follows:
LP Nat Minimum (in W.C.) 2 2 Maximum (in W.C.) 14 14
Measure pressure when the boiler is firing at full rate. Low gas pressure could indicate undersized gas line or insufficient gas supply.
25
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
“Static and operating gas pressure required at the gas valve inlet is between 2" W.C. and 14" W.C. for natural gas and 2" W.C. and 14" W.C. 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. This 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 specific job site requirements.”
Input Rate, Natural Gas
Gas appliances are rated based on sea level operation with no adjustment required at elevations up to 2000 ft, At elevations above 2000 ft, be reduced by 4% for each 1000 ft,
Check the input rate as follows:
1. Turn off 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. Start the boiler/water heater and let it run for 15 minutes.
4. Using the gas meter and a stopwatch, clock the time that it takes to burn 10 ft this time by 10.
5. Insert the heating value and the time, in seconds, into the formula below.
6. Input = (heating value, Btu/hr)(3600)/(time, seconds)
7. If the computed rate deviates by more than 5% from the rated input value of the unit, consult factory.
610 m
input ratings should
305 m
.
3
,
0.28 m
3
of gas and divide
610 m
High Limit (Aquastat)
The high limit is located in the top control area of the boiler/ water heater. A remote capillary bulb is run to a well on the outlet side of the supply header. The high limit can be reset by depressing the red button.
The water heater high limit should be set a minimum of
11°C
20°F, HOT WATER SUPPLY section for the proper supply water temperature.
Flow Switch
A flow switch is provided in the water outlet piping to prevent the boiler/water heater from firing without adequate water flow through the heat exchanger.
.
higher than the operating control. Refer to the
MPA STAGING CONTROL
This boiler control is mounted on the front panel of the boiler/water heater. It utilizes various temperature sensors to calculate boiler/water heater demand and adjust the modulation as needed. Various features of the control can be adjusted from the 3-button panel on the controller. To change settings of the modulation controller, press and hold all three buttons approximately 2 seconds until the “adjust” screen appears, then release them. The modulating control provides 4 modes of operation based on the requirements of the system. Each mode is defined below.
At the rear of the controller, there is a single DIP switch. This switch is factory set to provide a “lockout” with minimum adjustment capabilities in the field. However, for experienced installers and operators, changing these switch settings can offer many fine-tuning features. Please consult the factory for assistance.
CAUTION: Never increase the input to the boiler/water heater above that for which it is rated. Doing so can cause premature failure of the boiler!
CONTROL DESCRIPTION
Low Water Cutoff
If the boiler is to be installed above radiation or if required by other codes or regulations, install a low water cutoff in appropriate piping. Wire the switch and any external controls in series to the "Interlock" contacts in the junction box (see the attached Connection Diagrams for details). Ensure that the low water cutoff device(s) will function properly.
Operating Control
The preferred control setting for potable hot water is 130°F,
54°C
. The operating control should be set to the lowest
setting that will satisfy the consumer's needs.
WARNING: Setting the thermostat or operation control too high can result in scalding resulting in severe personal injury!
CAUTION: DO NOT change DIP switch or controller settings unless you have completely read and understood this document and the control manufacturer’s instructions. Doing otherwise will lead to improper modulating control.
Installer Level Settings
Modes of Operation (MODE): The control allows for four
modes of operation in order to define the control operation and piping arrangement used.
Mode 1: Setpoint Control. Parallel Piping.
piped in parallel with the system. The rate of modulation is controlled to provide a setpoint temperature at the boiler/ water heater outlet, whenever there is a heat demand present.
Mode 2: Setpoint Control.Primary/Secondary Piping.
Futera III is piped in a primary/secondary configuration. An additional system sensor is required to properly control the system supply (primary loop) temperature. The rate of modulation is controlled to provide the setpoint temperature in the primary loop.
The Futera III is
The
26
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
Mode 3: Domestic Hot Water (DHW) generation.
Futera III is piped in parallel with the storage tank. An additional sensor is required to monitor the tank temperature. The rate of modulation is controlled to maintain the desired DHW tank temperature.
DHW Operation:
the temperature sensed by the DHW sensor drops below the programmed tank target temperature by 1/2 the tank differential, adjustable from 2 to 10˚F. The demand remains until the temperature sensed by the DHW sensor rises above the programmed tank target temperature plus 1/2 the tank differential.
Mode 4: External Boiler Control:
Control allows for an external boiler control to operate the boiler. Factory installed terminals are supplied inside the front cabinet of the Futera III. These include boiler start contacts, 4-20mA modulating signal contacts, and boiler alarm dry contacts. A sequencer or controller must provide both boiler start contacts and a modulating signal for external control of the boiler/water heater. The modulating boiler control will display inlet and outlet temperatures as well as control the pump delay.
Boiler Target Temperature (BOIL TARGET)
The boiler target temperature is determined from the mode of operation. The control displays the temperature that it is currently trying to maintain at the operating sensor as BOIL TARGET in the View menu. The operating sensor for mode 1 is the outlet sensor. Mode 2 is the system supply sensor. Mode 3 is the tank sensor. There is no boiler target temperature generated in mode 4.
Boiler Differential (BOIL DIFF)
The boiler is operated with a differential in order to reduce short cycling. The boiler differential is divided around the boiler target temperature. The control will initiate the boiler/ water heater when the operating sensor is 1/2 of the differential setting below the boiler target temperature, and will stop the boiler/water heater once the modulating output is at the minimum modulation setting and the water temperature at the operating sensor is 1/2 of the differential setting above the boiler target temperature.
Boiler Purge (PMP DLY)
After a demand is satisfied, the control continues to operate the boiler pump for a period of time. The length of time that the boiler pump continues to run is based on the PMP DLY setting. Once the boiler turns off, the control keeps the boiler pump running for the time selected. This setting allows purging of any excess heat out of the boiler after the boiler is shut off.
When PMP DLY is set to OFF, there is no purging. When PMP DLY is set to ON, the pump runs continuously.
Tank Target Temperature (TANK TARGET), Mode 3 Only
The TANK TARGET setting is used to set the desired DHW tank temperature.
A DHW demand is generated whenever
The Modulating Boiler
The
Tank Differential (TANK DIFF), Mode 3 Only
A differential setting that operates 1/2 above and below the TANK TARGET is selectable using the TANK DIFF item in the Adjust menu.
Advanced Level Settings
CAUTION: These settings are not to be changed unless the manufacturer is contacted. Unstable or even dangerous operation of the boiler/water heater could result.
Motor Speed: The control includes a motor speed
adjustment, which sets the speed of the actuating motor that provides firing modulation. Default value is 30.
Start Modulation: The start modulation is the firing rate recommended for proper burner ignition. Default value is 4%.
Minimum Modulation: The minimum modulation is the firing rate the control will modulate down to during operation. This setting is based on the analog output signal, which provides low fire. Default value is 0%.
Fire Delay: The fire delay is the time that the control waits at the Start Modulation output. The delay is the result of a pre-purge and trial ignition built into the boiler's safety circuits. Default value is 20 sec.
Boiler Mass: The boiler mass setting allows the installer to adjust the control to the thermal mass of different types of heat sources used. The boiler mass setting automatically determines the rate of modulation. A higher thermal mass setting provides slower modulation, while a lower thermal mass provides faster modulation. Default value is 1.
Boiler Minimum: The boiler minimum is the lowest water temperature that the control is allowed to use as a boiler target temperature. For boiler operation the default value is 140˚F. For domestic hot water operation the default value is 120˚F.
Boiler Maximum: The boiler maximum is the highest water temperature that the control is allowed to use as a boiler target temperature. The default value is 210˚F.
DIAGNOSTICS
The Futera III has a display that indicates the sequence of operation. The display will also list faults should the unit fail to operate. An explanation of each status message and fault is listed below.
STANDBY FUTERA III: Indicates that power is being supplied to the unit and there is no call for heat.
STANDBY START DEMAND: Indicates that the boiler has a call for heat and that all safety limits have proved.
27
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
STANDBY REMOTE DISABLED: Indicates that the boiler start interlock is open. This usually indicates that either a building management system or a remote thermostat has disabled the boiler.
PREPURGE: The boiler performs a 10 second fan pre-purge to push out any gases that might still be in the combustion chamber before the boiler fires.
PILOT RUNNING: This is displayed during the pilot flame establishing period.
MAIN MODULATION: This indicates when the boiler has successfully established a pilot flame and the main valve has opened. The screen will also display the rate of modulation as a percentage.
POSTPURGE: The boiler performs a 10 second fan post­purge to push out any gases that are still in the combustion chamber after the flame is extinguished.
HONEYWELL ALARM: Indicates that there is a call for heat and the Honeywell Burner Control is locked out. Either it is locked out due to a flame failure, or it is malfunctioning. Press the reset button on the Burner Control.
LOCKOUT HIGH LIMIT: Indicates that the high limit controller has opened due to a high outlet water temperature. To reset press the red button on the high limit controller inside the upper cabinet. The high limit should be set at least 20°F above the target temperature for the boiler.
LOCKOUT AIR FLOW: Indicates that there is inadequate airflow through the boiler. Check the air filter for debris, or for any materials obstructing the flue outlet. Check the blocked flue switch, it may have to be reset.
LOCKOUT GAS PRESSURE: Indicates that either the low gas or high gas pressure switches have opened. These switches are manual reset.
MAINTENANCE
WARNING: Disconnect electrical power and close the manual gas shut off valve before performing maintenance or severe personal injury may result!
CAUTION: Servicing, inspection and adjustment must be done by a trained technician in accordance with all applicable local and national codes. Improper servicing or adjustment can damage the boiler/water heater!
The boiler/water heater must be cleaned and inspected at least once a year and 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 31 and 32 for component identification.
CAUTION: Improper burner servicing can result in premature burner failure voiding the warranty!
Burner Removal
1. Close the manual shutoff valves in the gas supply line and turn off electrical power to the boiler/water heater.
2. Remove the jacket top panel.
3. Disconnect the wires to the fan and remove the four bolts that secure the fan to the transition piece.
4. Remove wires from the spark rods and remove the UV sense from the transition piece.
5. Disconnect the compression nut at the back of the transition piece to remove pilot gas tubing.
6. Remove the four nuts holding the transition piece to the heat exchanger.
7. Lift and remove the transition piece and burner together from the boiler/water heater, taking care not to damage the spark rods and or their alignment.
8. Disconnect the compression nut from the inside of the transition piece.
9. Remove the transition piece, taking care not to damage the spark rods and or their alignment.
LOCKOUT WATER LIMIT: Indicates that the water flow switch is not proving adequate water flow through the boiler or the low water cutoff is sensing low water.
LOCKOUT HI-LIMIT & WATER LIMIT: Indicates that both the high-limit and water limit interlocks are open.
LOCKOUT HI-LIMIT & GAS PRESSURE: Indicates that both the high-limit and gas pressure interlocks are open.
MULTIPLE INTERLOCK: Indicates that there are more than 2 interlocks that are open. Check the high-limit, gas pressure switches, and water flow switch.
LOCKOUT TEKTRA ALARM: Indicates a problem with the RBI Modulating Control. This is usually the result of a short or open circuit in one of the temperature sensors. Inspect the sensor in question to see if it is connected properly. Also, check to see if the sensor is shorted or open using an ohmmeter.
Heat Exchanger Inspection
1. Close the manual shutoff valves in the gas supply lines and turn off electrical power to the boiler/water heater.
2. Remove burner following the instructions in the Burner Removal section.
3. Remove the front jacket panel and combustion chamber door.
4. Inspect the inside and outside of the heat exchanger for signs of damage, sooting or corrosion.
5. The 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.
6. If there are no signs of damage, sooting or corrosion, reassemble the unit following the previous steps in reverse order.
28
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
7. A badly corroded or damaged heat exchanger must
be replaced, see the Heat Exchanger Repair &
Replacement section.
Heat Exchanger Cleaning
1. Close the shut off valves in the inlet and outlet piping. On heating systems close the system fill valve and relieve the system pressure from the boiler by carefully lifting the relief valve or opening the drain valve.
2. Disconnect the boiler/water heater from the system piping.
3. Remove the eight bolts on the rear pipe enclosure panel.
4. Remove the front jacket panel and combustion chamber door.
5. Slide the heat exchanger out of the unit.
6. Remove the “V” baffle straps and “V” baffles.
7. Thoroughly clean the heat exchanger with water from a high-pressure hose. Use a soft bristle brush if necessary.
8. Replace the cleaned heat exchanger and other components in the reverse order of their removal.
Heat Exchanger Repair & Replacement
1. A leaking or otherwise damaged tube(s) can be replaced as outlined in steps 2 through 8.
2. Remove the heat exchanger from the boiler/water heater as outlined in the Heat Exchanger Cleaning section.
3. Remove the pipe plugs from the inlet/outlet and return headers opposite from the ends of the tube(s) being replaced.
4. Carefully cut the damaged tube(s) in half, taking care not to damage the adjacent tubes and remove.
5. Install and swage/expand in place the new tube(s).
6. Replace the pipe plugs using a suitable thread sealant on each one.
7. Sagging or distorted heat exchanger tubes are an indication of low water flow through the system. A damaged heat exchanger must be replaced and the condition that caused the damage resolved before the boiler/water heater is returned to service.
8. Replace the heat exchanger and other components in the reverse order of their removal.
Controls
Use the “GENERAL OPERATION” and “CHECKING AND ADJUSTMENTS” sections of this manual for reference.
1. Check the operating controls for proper operation.
2. A float type low water cutoff device must be flushed out per the manufacturers’ instructions. The probe on a probe low water cut off must be removed, cleaned and inspected at least once a year. Ensure that the low water cutoffs operate properly. If not, replace them.
3. The flow switch contacts must be open when water flow is not present.
4. The relief valve should not weep or discharge water at normal system pressure. If it does, contact a qualified 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!
5. The aquastat high limit controls the maximum water temperature in the boiler. It is adjustable from 140°F,
60˚C
to 250°F,
121°C
. If the water temperature reaches the set temperature before the demand for heat has been met, the aquastat high limit should shut the boiler off. The water temperature should never exceed the
121°C
maximum set point of 250°F,
. The aquastat high limit cannot be repaired. If it fails to function properly, replace it.
6. Visually check the pilot and main burner flames to ensure proper operation, see Figures 16 & 17.
WARNING: A yellow, floating flame indicates a lack of combustion air. Do not operate the boiler/water heater until the problem is solved or severe personal injury or death may occur!
Figure 17 – Main Burner Flame
Air Intake & Vent System
Thoroughly inspect the air intake and vent systems for any signs of blockage, corrosion or leakage. Immediately replace any unsound vent system piping. Inspect the air filter and wash with warm water and soap if dirty.
RIOM-18-REV. A
29
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
TROUBLE-SHOOTING
OPERATIONAL PROBLEM CORRECTIVE ACTION
“Standby Futera III” is not shown. Ensure that proper voltage is being supplied to the unit.
Inspect the circuit breaker for the boiler/water heater circuit. Ensure that the power switch operates properly and is
wired correctly.
Lockout high limit is displayed with a call for heat. Check the high limit control, press red button to reset.
High limit should be set at least 20°F, temperature.
Lockout gas pressure is displayed with a call for heat. Ensure that the manual main gas valve is open.
Ensure that there is sufficient gas pressure supplying the boiler.
Check pressure setting on the low gas pressure switch.
Lockout water limit is displayed with a call for heat. Ensure that there is sufficient water flow through the
boiler.
Lockout Tektra alarm is displayed with a call for heat. There is a problem with the Tekmar operating control.
Check temperature sensors to see if connected properly. Check sensors for open or shorts using an ohmmeter.
11°C
above setpoint
30
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
RIOM-20-REV. B
SEE VIEW "A"
SEE VIEW "B"
15C
15B
SEE VIEW "C"
Figure 18 – Exploded View
31
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
VIEW: B
ROTATED VIEW
16
18
VIEW: A
VIEW: C
RIOM-37-REV-B
32
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
Futera III Model Size with Item Quantities Below
Ref # Name of Part Part # 500 750 1000 1250 1500 1750 2000
1 Top/Bottom X Profile 04-0523 3 3 3
04-0524 3333
2 Middle X Profile 04-0525 2 2 2
04-0526 2222 3 Top Y Profile 04-0530 4 4 4 4444 4 Bottom Y Profile 04-0531 4
04-0532 4
04-0533 4
04-0534 4
04-0535 4
04-0536 4
04-0537 4 5 Top/Bottom Z Profile 04-0538 4 4 4
04-0539 4444 6 Middle Z Profile 04-0540 2 2 2
04-0541 2222 7 Bottom/Front X Profile 04-0524 1 1 1
04-0525 1111 8 Frame Corner 20-0053 3 3 3 3333 9 Frame Corner 04-0543 1 1 1 1111
10 Crosses 20-0054 3 3 3 3333 11 Drilled Crosses 04-0544 1 1 1 1111 12 Bottom Corner 04-0542 4 4 4 4444 13 Base Legs 04-0521 2 2 2
04-0522 2222
14 Gas Train Support Bracket Assembly 70-2344 1 1
70-2345 1 1 1
70-2346 1 1
15 Burner 10-0280 1
10-0309 1
10-0308 1
10-0286 1
10-0288 1
10-0290 1
10-0292 1
15a Burner Gasket 06-0026 1 1 1
06-0027 1111
15b Burner Gasket 06-0011 1 1 1
06-0012 1111
16 Solenoid Valve w/Regulator, NG 11-0372 1 1 1 1111
Solenoid Valve w/Regulator, LP 11-0374 1 1 1 1111
18 Gas Valve, DMV-SE507 11-0216 1
Gas Valve, DMV-SE512 11-0211 1 1 1111 NS Valve Proving System, VPS504 (IRI) 11-0412 1 1 1 1111 NS Flange 1" 11-0217 2 2 NS Flange 1 1/4" 11-0213 2 2 2 NS Flange 1 1/2" 11-0214 2 2 NS Orifice Gasket 06-0023 1 1
06-0022 1 1111
19 Main Gas Orifice Assembly 70-2382 1 1 1
70-2383 1 1 70-2384 1 1
NS Orifice Plate 03-2911 1
03-2912 1 03-2913 1 03-2914 1 03-2915 1 03-2916 1 03-2917 1
33
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
Futera III Model Size with Item Quantities Below
Ref # Name of Part Part # 500 750 1000 1250 1500 1750 2000
NS Firing Valve 3/4" 11-0461 1 1 1 1111
20 Ball Valve 11-0395 1 1 1 1111 21 Firing Valve, 1" 11-0456 1 1
Firing Valve, 1 1/4" 11-0457 1 1 1
Firing Valve, 1 1/2" 11-0458 1 1
22 "A" Valve, 1" 11-0465 1 1
"A" Valve, 1 1/4" 11-0466 1 1 1
"A" Valve, 1 1/2" 11-0467 1 1
23 Blower, Fasco 7043 12-0016 1 1 1
Blower, Fasco 7035 12-0017 1111 NS Air Orifice 14-0099 1 1 1 1111
24 Mixing Box 20-0051 1 1 1
20-0052 1111 24a Airbox Mounting Assembly 70-2309 1 1 1 1111 24b Gasket 06-0045 1 1 1 1111
25 Flow Switch 14-0203 1 1 1 1111 26 Frequency Drive, KBVF-14W 15-0227 1 1 1
Frequency Drive, KBVF26D 15-0226 1111
27 Jacket Top Panel 70-2412 1 1 1
70-2413 1111
28 Upper Rear Panel 70-2414 1 1 1
70-2415 1111
29 Rear Pipe Enclosure Assembly 70-2333 1 1 1
70-2334 1111
30 Lower Rear Jacket Panel 03-2822 1
03-2823 1
03-2824 1
03-2825 1
03-2826 1
03-2827 1
03-2828 1
31 Upper Left Jacket Panel 03-2831 1 1 1
03-2832 1111
32 Upper Right Jacket Panel 03-2833 1 1 1
03-2834 1111
33 Lower Left & Right Jacket Panel 03-2835 2
03-2836 2
03-2837 2
03-2838 2
03-2839 2
03-2840 2
03-2841 2
34 Upper Front Jacket Panel 70-2317 1 1 1
70-2318 1111
35 Lower Front Jacket Panel 70-2365 1
70-2366 1
70-2367 1
70-2368 1
70-2369 1
70-2370 1
70-2371 1
36 Combustion Chamber Top Panel 70-2356 1 1 1
70-2357 1111
37 Combustion Chamber Rear/Side Panel 70-2319 1
70-2320 1
70-2321 1
70-2322 1
70-2323 1
70-2324 1
70-2325 1
34
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
Futera III Model Size with Item Quantities Below
Ref # Name of Part Part # 500 750 1000 1250 1500 1750 2000
38 Combustion Chamber Door Assembly 70-2358 1
70-2359 1
70-2360 1
70-2361 1
70-2362 1
70-2363 1
70-2364 1
39 Pressure Relief Valve 50# 30-0360 1 1 1
Pressure Relief Valve 50# 30-0374 1 Pressure Relief Valve 50# 30-0379 1 1 1
Pressure Relief Valve 125# 30-0364 1 1 1 1111 40 Latch 20-0046 2 2 2 2222 41 Drain Valve Assembly (MB) 70-2427 1 1 1
70-2428 1111
Drain Valve Assembly (MW) 70-2429 1 1 1
70-2430 1111
42 Air Filter 09-0489 1 1 1
09-0498 1 1 09-0499 1 1
43 Filter Cover 03-2206 1 1
03-2207 1 1 1 03-2208 1 1
44 Pilot Assembly 70-2276 1 1
70-2278 1 70-2280 1 1
70-2282 1 1 45 Tridicator 13-0305 1 1 1 1111 46 Heat Exchanger (Copper) 70-2186 1
70-2187 1
70-2188 1
70-2189 1
70-2190 1
70-2191 1
70-2192 1
Heat Exchanger (Cupronickel) 70-2193 1
70-2194 1
70-2195 1
70-2196 1
70-2197 1
70-2198 1
70-2199 1 47 Air Damper Assembly 70-2351 1 1 1
70-2353 1 1
70-2354 1 1 48 High Limit, L4008E, (MB) 14-0112 1 1 1 1111
High Limit ,L4008E, (MW) 14-0105 1 1 1 1111 NS Operator, T6031A (Pool Heater) 14-0003 1 1 1 1111 NS Thermometer Well, 3/8 x 2 13-0102 2 2 2 2222 NS High Limit Well, 3/8 x 3 13-0104 2 2 2 2222
49 Tekmar MPA Control 14-0322 1 1 1 1111 50 Transformer, 40 VA 15-0002 1 1 1 1111
NS Pump Contactor 15-0118 1 1 1 1111
51 Purge Timer, ST7800 16-0007 1 1 1 1111 52 Spark Generator, Q352B 16-0008 1 1 1 1111 53 Flame Safeguard, RM7895C 16-0024 1 1 1 1111 54 Main Board 40-0068 1 1 1 1111
55 Display Board 40-0069 1 1 1 1111 NS Ribbon Cable 40-0115 1 1 1 1111 NS Toggle Switch 48-0010 1 1 1 1111
56 Air Pressure Switch 11-0416 1 1 1 1111
35
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
Futera III Model Size with Item Quantities Below
Ref # Name of Part Part # 500 750 1000 1250 1500 1750 2000
57 Blocked Flue Switch 11-0411 1 1 1 1111 NS Terminal Block 6P 48-0157 1 1 1 1111 NS Terminal Block 4P 48-0161 1 1 1 1111 NS Mini Peeper, C7027A 16-0009 1 1 1 1111 NS UV Amplifier, R7849A 16-0006 1 1 1 1111 NS Base, Q7800A 16-0003 1 1 1 1111 NS Ignition Cable 44-0056 1 1 1 1111
58 Flame Rod Assembly 70-2303 1 1 1
70-2307 1111 58a Electrode 16-0333 2 2 2 2222 58b Electrode Gasket 06-0024 1 1 1
06-0025 1111 58c View Port Assembly 70-2205 1 1 1 1111
59 Control Box Panel 70-2376 1 1 1
70-2377 1111
NS Harness RM7800 40-0117 1 1 1 1111 NS Harness 120V Switch 40-0118 1 1 1 1111 NS Harness Tekmar 40-0119 1 1 1 1111 NS Harness Transformer 40-0120 1 1 1 1111 NS Harness VFD 40-0121 1 1 1 1111
60 Transition Assembly 70-2305 1 1 1
70-2306 1111 60a Gasket 06-0043 1 1 1
06-0044 1111
61 Relay, 2P 15-0107 1 1 1 2222 NS Stainless Steel Wipes 66-0050 1 1 1 1111 NS Rating Plate 82-0054 1 1 1 1111 NS Paint 66-0013 1 1 1 1111 NS Silicone 66-0151 1 1 1 1111
OPTIONS
NS Alarm Bell 70-2232 1 1 1 1111 NS Main Flame Status Contact 30-0759 1 1 1 1111 NS Low Gas Pressure Switch 11-0410 1 1 1 1111 NS High Gas Pressure Switch 11-0411 1 1 1 1111 NS Flow Switch (Potter) 14-0201 1 1 1 1111 NS C.A.D. Dry Contact 30-0782 1 1 1 1111 NS Freeze Protection Kit, 8" Damper 70-2330 1 1 1
Freeze Protection Kit, 12" Damper 70-2332 1111 NS Pump Contactor 3 PH 15-0111 1 1 1 1111 NS Keyboard Display Module, S7800A 16-0010 1 1 1 1111 NS Vent Termination Hood 5" 09-0117 1 1
Vent Termination Hood 6" 09-0112 1 1
Vent Termination Hood 8" 09-0113 1
Vent Termination Hood 10" 09-0115 1 1 NS Air Intake Hood 6" 09-0102 1 1 1
Air Intake Hood 8" 09-0103 1
Air Intake Hood 10" 09-0104 1
Air Intake Hood 12" 09-0105 1 1
36
FUTERA III MODULATION
STARTUP SHEET
DATE: JOB NAME:
TECHNICIAN: LOCATION:
COMPANY: MODEL #:
PHONE NUMBER: SERIAL #:
PRE-STARTUP CHECK LIST
NO VISUAL DAMAGE TO UNIT PIPING PROPERLY CONNECTED BOILER CIRCULATOR WIRED VENT/STACK CONNECTED
INLET AIR FILTER INSTALLED AND CLEAN PROPER SERVICE CLEARANCE PROVIDED PUMP RUNNING, HEAT EXCHANGER FULL GAS LINES PURGED, NO LEAKS, NO MISSING
TEST PLUGS
BOILER STARTUP SEQUENCE
Note: Locate the T1 and AA terminals in the bottom-right of the electrical panel on the control relay board. Also locate the gas pressure tapping upstream of the main gas valve.
1. Create head demand, jumper the T1 terminals on the control board.
2. With gas off, check for continuous and strong spark.
3. With pilot gas on, check for proper pilot flame.
4. With main and pilot gas on, wait for boiler to reach 50%.
5. Check combustion using calibrated flue gas analyzer.
6. Record 50% fire combustion analysis below.
7. Jumper the AA terminals on the control board.
8. Record 100% fire combustion analysis below.
COMBUSTION ANALYSIS
GAS PRESSURE (IN. W.C.)
CO
2
O
2
CO (PPM)
NET STACK TEMP.
50% FIRE 100% FIRE
FIII-STARTUP REV 1.0
37
TESTING MODULATING BOILER CONTROL
Remove jumpers from the AA and T1 terminals. Allow the boiler to control itself through the Modulating Boiler Control. Check sticker on the inside of the door or the Installation Manual for instructions on using the boiler control.
BOIL TARGET BOIL MIN START MODULATION
MODE FIRE DELAY MIN MODULATION
TANK TARGET (MODE 3) BOIL MASS DLY
TANK DIFF (MODE 3) DIFF UNITS
BOIL MAX MOTOR SPEED
SAFETY TESTS CHECKLIST
FLOW SWITCH LOW WATER CUTOFF
AIR SWITCH HIGH-LIMIT
COMMISSIONING THE BOILER/WATER HEATER
UNIT CYCLED MIN. OF 15 TIMES CUSTOMER INSTRUCTED ALL COVERS REPLACED CUSTOMER GIVEN MANUAL TARGET TEMP. SET PER CUSTOMER
COMMISSIONED BY: _____________________________ (SIGNATURE) DATE: ___________________
ADDITIONAL NOTES AND COMMENTS
THE DELTA T BETWEEN THE HEATERS INLET AND OUTLET IS CRITICAL TO PROPER FLOW. 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 THEN 20°F, 11.1°C.
INLET TEMPERATURE
OUTLET TEMPERATURE
FIII-STARTUP REV 1.0
38
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
39
260 North Elm Street 1300 Midway Boulevard Westfield, MA 01085 Phone: (413) 568-9571 Phone: (905) 670-5888 Fax: (413) 568-9613 Fax: (905) 670-5782
Mississauga, Ontario L5T 2G8 Canada
www.rbiwaterheaters.com
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