MECHANICAL
ELECTRICAL SYSTEMS
LINCOLN SCHOOLS
LINCOLN, RHODE ISLAND
1. To evaluate condition of existing mechanical electrical systems to determine system deficiencies and provide a list of recommendations for improvements along with an estimated cost of construction for improvements.
2. To review capacity of existing boiler and electrical loads to determine if existing services can support proposed additions.
I Fairlawn Elementary School
3 Fairlawn Way, Lincoln, RI
A. Heating & Ventilating System
1. Description of existing heating and ventilating system
The existing heating system was installed in 1957. It was a forced hot water system that served wall fin radiation behind bookshelf units. There are four circulators that feed the gymnasium, kitchen area, right side of the building, and left hand side of the building. The piping material is all copper and the control system non-existent.
In 1995, an addition was installed. This addition provided a library, eight classrooms, and offices. To provide adequate heat, two new gas fired Patterson Kelley 1200 series natural gas units were installed.
In the new classrooms, unit ventilators were installed and two circulators were added to properly distribute water throughout the building. A new automatic temperature control system was installed to provide better temperature comfort levels. The system has all electric controls.
For domestic hot water, a new gas fired water heater with a hot water recirculating system was added.
2. Condition of existing mechanical equipment.
The boiler burner units have been replaced in 1995 with two Patterson Kelley 1200 series units, which operate with natural gas. Each boiler is rated for approximately 1,000,000 Btu/hr. Both units appear to be in satisfactory condition, no evidence of deterioration. Domestic hot water heater and recirculating hot water system operates satisfactorily.
Classroom unit ventilators are in good condition and are operating satisfactorily.
The gymnasium & multi purpose rooms are heated and ventilated with large capacity air handling units utilizing hot water heating coils to maintain proper heating comfort levels.
The new automatic temperature control system installed when the addition was installed works satisfactorily.
3. System deficiencies
The controls for the four circulators serving the original building are not operable and existing zone valves and thermostats need to be rehabilitated.
4. Recommendations for improvements
Provide new controls for existing four circulators serving old section of building and rehabilitate all existing zone valves and thermostats in original section of building.
5. Estimated cost for improvements
Rehabilitation of existing controls
Approximate Estimated Cost $ 20,000.00
Total Approximate
H&V Estimated Cost $ 20,000.00
B. Plumbing System
1. Existing domestic hot water heater should be replaced with new gas fired unit and provide new hot water recirculating line.
Approximate
Estimated Cost $ 12,500.00
C. Electrical System
1. Condition and capacity of existing electrical service.
The existing electrical service to the school is a 400 amp 120/208 volts three phase
system.
2. The current electrical capacity appears to be adequate to support the existing facility.
If a reasonable size addition were to be erected and with the latest demands for computers throughout the building additional service and wiring distribution system would have to be provided to support the additional loads.
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II. Saylesville
Elementary School
50 Woodland
Street, Lincoln, Rhode Island
A. Heating & Ventilating System
1. Description of existing heating and ventilating system
The existing heating system is a forced hot water two-pipe primary loop system with seven secondary pumping stations. The secondary piping systems are reverse return types. The piping system is all black steel piping and fittings.
The heating system water is produced by a H.B. Smith, eleven-section cast iron boiler burner unit model G-400, which has an output of 1,739.0 M.B.H.
A three way external compensated water valve provides compensated water to the heating system. The boiler burner unit is the original unit installed in 1972.
A new automatic temperature control compressor was recently installed to operate the pneumatic control system. All controls in the existing building are pneumatic and in the new addition, all electric. Controls are manufactured by Barber Coleman.
In the 1991 addition are unit ventilators with outside air dampers interlocked with the respective roof exhaust fans to maintain proper ventilation requirements.
2. Condition of existing mechanical equipment.
The existing boiler burner unit is the original unit installed in 1972 and has served its normal life expectancy.
3. System deficiencies
Primary secondary pumping system does not provide adequate heating water at end of distribution system.
Six rooms (old open classroom section) have poor heating and ventilating comfort levels.
Art room lack of ventilation.
Compensated water controller is modulating system water rather than boiler water.
4. Recommendations for improvements
Provide two new gas fired boiler burner units and remove compensated water controller and sequence boiler burner units to maintain water-reset temperatures.
Rehabilitate all heating and ventilating equipment throughout building, open outside air dampers, power wash coils, clean inside units thoroughly, check motors, belts, dampers and linkage, provide all new automatic temperature control including freeze-stats and room thermostats. Check for proper sequence of operation with respective exhaust fans.
Replace primary secondary pumping system with two new circulators and add return hot water heating line.
Provide better ventilation systems for Art room and six interior classrooms
5. Estimated cost for improvements
Provide two boiler burner units
Approximate Estimated Cost $ 30,000.00
Rehabilitation of existing heating &
ventilating equipment
Approximate Estimated Cost $ 40,000.00
Art room and six classrooms ventilation
systems.
Approximate Estimated Cost $ 20,000.00
Remove all secondary pumps, provide two new
Circulators and extend heating return line.
Approximate Estimated Cost $ 25,000.00
Total Approximate H&V Estimated
Cost $ 115,000.00
B.
Plumbing Systems
1.
Systems satisfactory
C. Electrical System
1. Condition and capacity of existing electrical service.
The existing electrical service to the school is a 400 amp 120/208 volts three phase
system.
2. The current electrical capacity appears to be adequate to support the existing facility.
If a reasonable size addition were to be erected and with the latest demands for computers throughout the building additional service and wiring distribution system would have to be provided to support the additional loads.
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III.
Lonsdale Elementary School
River Road, Lincoln, RI Street,
Lincoln, Rhode Island
A. Heating
& Ventilating System
1. Description of existing heating and ventilating system
The existing heating system, installed in 1958, is a forced hot water type served by an H.B. Smith cast iron sectional gas fired boiler burner unit. Three circulators are provided to distribute heating water to the gymnasium, five classrooms in one area and three classrooms in another.
Classrooms are heated by wall fin radiation located behind bookshelf units.
In 1972 an addition of six classrooms and a library was erected. An independent heating system consisting of a boiler burner unit and two circulators were provided to serve convectors in each room. Ventilator is achieved by a common exhaust fan with a simple ducted air distribution system.
2. Condition of existing mechanical equipment.
The existing boiler burner unit, installed in 1958, is a H.B. Smith cast iron sectional gas fired boiler burner unit model 440-1, 13 sections that has a capacity of 000.0 M.B.H. Although operable, this unit has served beyond its normal life expectancy.
In the newer mechanical room, 1972 addition, is a gas fired Bryant boiler burner unit that has a capacity of 360 M.B.H. The boiler room has many code violations and consideration should be given to removing it or change its usage.
3. System deficiencies
New library has insufficient heat.
1972 mechanical room has many code violations.
The controls for the three circulators serving the original building are not operable and existing zone valves and thermostats need to be rehabilitated.
4. Recommendations for improvements
Replace both boiler burner units with two new gas fired units and two new circulators and install in 1958 mechanical room.
Replace convectors in new six classrooms and library with new fan coil units and extend piping as required to accommodate new boiler system.
Rehabilitate all existing zone valves and thermostats in original section of building.
5. Estimated cost for improvements
New boiler burner units
and circulators
Approximate Estimated Cost $ 30,000.00
New fan coil units and
piping.
Approximate Estimated Cost $ 25,000.00
Rehabilitation of existing controls
Approximate Estimated Cost $ 30,000.00
Total Approximate H&V Estimated
Cost $ 85,000.00
B. Plumbing
System
1. Provide new
hot water recirculating line from farthest plumbing fixture to gas fired water
heater.
Approximate Estimated Cost $ 2,500.00
C. Electrical System
1. Condition and capacity of existing electrical service.
The existing electrical service to the original school is a 300-amp 120/208 volts three phase system. From this service for the 1972 addition a 100-amp panel was installed to serve the addition.
The current electrical capacity appears to be inadequate to support the existing facility.
If a reasonable size addition were to be erected and with the latest demands for computers throughout the building additional service and wiring distribution system would have to be provided to support the additional loads.
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IV.
Lincoln Central Elementary School
1081 Great Road, Lincoln, RI
A. Heating &
Ventilating System
1. Description of existing heating and ventilating system
The existing heating system installed in 1964 consist of two Bryant gas fired boiler burner units with capacities of 1,680 M.B.H. each. Controls are pneumatic type manufactured by Honeywell Controls and currently are under a service contract with Honeywell.
Classrooms are heated by wall fin radiation located behind window height bookshelves. A room thermostat wired to a pneumatic zone valve thermostatically controls each room. Roof exhaust fans ducted from coat closets in each room accomplish ventilation.
In 1988 a small addition of approximately four classrooms was erected. These rooms are equipped with classroom unit ventilators and are piped from the existing hot water piping system. The piping system is all black steel piping and fittings.
2. Condition of existing mechanical equipment.
The existing boiler burner units are Bryant gas fired units with capacities of 1,680 M.B.H. each, installed in 1964. Although the boiler units are presently serviceable they have served their normal life expectancy and consideration should be given for replacement.
3. Recommendations for improvements
Rehabilitate all heating and ventilating equipment throughout building, open outside air dampers, power wash coils, clean inside units thoroughly, check motors, belts, dampers and linkage, provide all new automatic temperature control including freeze-stats and room thermostats. Check for proper sequence of operation with respective exhaust fans.
4. Estimated cost for improvements
Provide two boiler burner units
Approximate Estimated Cost $ 27,500.00
Rehabilitation of existing heating &
ventilating equipment
Approximate Estimated Cost $ 40,000.00
Total Approximate H&V Estimated Cost $ 67,500.00
B. Plumbing System
1. Systems deficiencies
Existing 500 gallon domestic water tank is deteriorating
C. Electrical System
1. Condition and capacity of existing electrical service.
The existing electrical service is an 800-amp 120/208 volts three phase system.
2.
Summary
The current electrical capacity appears to be adequate to
support a reasonable size addition.
With the latest demands for computers throughout the building additional
wiring distribution system would have to be provided to support the additional
loads.
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V.
Northern Lincoln Elementary
School
New River Road, Lincoln, RI
A.
Heating & Ventilating
System
1. Description of existing heating and ventilating system
The existing heating system installed in 1971 is a forced hot water primary secondary type utilizing two circulators for the primary system and seven circulators for the secondary systems. Classrooms are heated and ventilated with unit ventilators with outside air dampers interlocked with respective exhaust fans. Controls are Johnson Control type and are presently maintained by a service contract with Linc Controls of Warwick.
Heating water is produced by a natural gas fired Weil McLain cast iron sectional boiler burner unit Model BL-1194-WF with a power flame burner which has a capacity of 2,525.2 M.B.H.
In 1995, an approximately twenty four-room addition was added. An independent heating and ventilating system was provided. Each classroom is equipped with one unit ventilator and matching exhaust fan cabinet and are individually controlled. The piping system is all black steel piping and fittings for the mains and copper tubing to each unit.
Heating water for the newer addition is produced by a gas fired Patterson Kelley 1500 boiler burner unit with a capacity of 1,275 M.B.H.
2. Condition of existing mechanical equipment.
The existing boiler burner unit is a Weil McLain model BL-1194-WF cast iron sectional gas fired unit with a capacity of 1,680 M.B.H. installed in 1971. Although the boiler unit is presently serviceable it has served its normal life expectancy and consideration should be given for replacement.
3. Recommendations for improvements
Replace 1971 boiler burner unit with two new gas fired units.
Rehabilitate all heating and ventilating equipment throughout the 1971 portion of the building, open outside air dampers, power wash coils, clean inside units thoroughly, check motors, belts, dampers and linkage, provide all new automatic temperature control including freeze-stats and room thermostats. Check for proper sequence of operation with respective exhaust fans.
4. Estimated cost for improvements
Provide two boiler burner units
Approximate Estimated Cost $ 27,500.00
Rehabilitation of existing heating &
ventilating equipment
Approximate Estimated Cost $ 40,000.00
Total Approximate H&V Estimated Cost $ 67,500.00
B. Plumbing System
1. Systems deficiencies
Existing 500 gallon domestic water tank is deteriorating
Plumbing fixtures throughout 1971 portion of building need replacement.
2. Recommendations for improvements
Replace existing 500-gallon hot water storage tank with two new 100-gallon gas fired units
Replace existing plumbing fixtures with new.
3. Estimated cost for improvements
Two gas fired water heaters and tank removal
. Approximated Estimated Cost $ 7,000.00
New plumbing fixtures
Approximated Estimated Cost $ 30,000.00
C. Electrical System
1. Condition and capacity of existing electrical service.
The existing electrical service is an 800-amp 120/208 volts three phase system.
2.
Summary
The current electrical capacity appears to be adequate to
support a reasonable size addition.
With the latest demands for computers throughout the building additional
wiring distribution system would have to be provided to support the additional
loads.
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VI.
Lincoln High/Middle School
Old River Road, Lincoln, RI
A. Heating & Ventilating System
1. Description of existing heating and ventilating system
The original heating and ventilating system installed in 1954 consist of two oil fired low pressure steam cast iron boiler burner units (units 1 & 2) and in 1972 one hot water heating boiler burner unit was installed (Unit 3), which have capacities as follows:
Boiler 1. H.B. Smith Mills 44 17 sections 4,891.0 M.B.H.
Boiler 2. H.B. Smith Mills 44 17 sections 4,891.0 M.B.H.
Boiler 3. Weil Mclain 994 2,320.0 M.B.H.
Originally all boilers operated with number 4 oil. Presently all boilers are operating with natural gas.
Classrooms are heated and ventilated with unit ventilators equipped with steam coils and face & bypass controls. Controls are presently serviced with a contract from Honeywell. There presently is no power ventilation system for classrooms.
Gymnasium is heated and ventilated with two air-handling units, equipped with steam heating coils, two speed fans and outside air/return air filter mixing boxes. Cabinet unit heaters are installed at floor level to provide better comfort levels. There is no power exhaust air systems.
In 1960, a four-room addition was added. One steam-heated air-handling unit was installed with two under floor duct systems, to provide two zones of control. One duct feed two classrooms on one side and two classrooms on the other. Return air is transferred from the classrooms through louvers in the doors, travel through the corridor and into s\a return air grille at the fan equipment room. Steam is provided by the extension of the 1954 system.
In 1964, a large addition was installed. This system consists of two gas fired H.B. Smith 640 cast iron boiler burner units with capacities of 5,031.0 M.B.H. each.
A 2500-gallon domestic storage water tank is provided to provide 160-degree water to the kitchen and provide adequate water for boys and girls shower rooms.
Classrooms in this addition are heated and ventilated with unit ventilators equipped with hot water coils. All units are individually controlled by Johnson Control thermostats. Ventilation is achieved by outside air tempered through the unit ventilator, passes through louvers in the classroom doors (presently blocked) and travels into the corridors to roof exhaust fans.
The piping system throughout this addition travels through wall fin covers.
The gymnasium is heated and ventilated with two air handling units equipped with hot water heating coils, filter mixing boxes and simple ducted air distribution systems. Two roof mounted power exhaust fans are provided to maintain proper ventilation levels.
The last addition in 1995, receives its heating water from the 1954 boiler burner units numbers 1 & 2 through a steam to hot water heat exchanger that converts the steam to heating hot water to serve the addition. Also the number 3 boiler, which operates as a hot water boiler supplements the 1995 addition heating system.
Classrooms are heated and ventilated with unit ventilators and matching exhaust fan units in each room.
2. Condition of existing mechanical equipment.
All three-boiler burner units have served beyond their normal life expectancy and should be replaced.
3. System deficiencies
Boilers operate as steam units.
Existing unit ventilators operate with steam, which is expensive to operate and require substantial maintenance.
Existing steam piping in some areas are installed below ground and difficult to repair
4. Recommendations for improvements
Replace existing three boiler burner units with five gas fired Patterson Kelley units,
Re-pipe all heating equipment to operate as hot water heating units, replace steam
lines with new forced hot water lines and provide two new circulators.
Rehabilitate all heating and ventilating equipment throughout the 1954 and 1960 portions of the building. Open outside air dampers, power wash coils, clean inside units thoroughly, check motors, belts, dampers and linkage, provide all new automatic temperature control including freeze-stats and room thermostats. Check for proper sequence of operation with respective exhaust fans.
Modify 1960 four-classroom addition heating and ventilating system.
Provide power ventilation for gymnasium.
Modify ventilation system for 1964 addition by providing new exhaust system.
5. Estimated cost for improvements
New boiler burner units,
Circulators and piping
Distribution system
Approximate Estimated Cost $ 100,000.00
Rehabilitation of existing heating equipment
Approximate Estimated Cost $ 60,000.00
Modify HV system 1960 classrooms
Approximate Estimated Cost $ 4,000.00
Provide power exhaust gymnasium
Approximate Estimated Cost $ 4,000.00
Modify 1954 exhaust system
Approximate Estimated Cost $ 25,000.00
Total Approximate H&V Estimated Cost $ 193,000.00
B. Plumbing System
1. System deficiencies
There is no hot water at the sinks for Janitor’s closets and Home Economic sinks.
Girls and Boys shower rooms replace existing tempering valves.
2. Estimated costs for improvements
Hot water lines for Janitor’s closets and Home Economic sinks.
Approximate Estimated Cost $ 5,000.00
Girls and Boys shower rooms replace existing tempering valves.
Approximate Estimated Cost $ 2,000.00
C. Electrical System
1. Condition and capacity of existing electrical service.
The existing electrical service to the school in the 1954 portion is an 800-amp 120/208 volts three phase system. In the 1995 addition, is a 1600-amp 120/208 volts three phase system.
2. Summary
The current electrical capacity appears not to be adequate to support a reasonable size addition. With the latest demands for computers throughout the building additional wiring distribution system and the electrical service would have to be up-graded to support the additional loads.
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VII.
Administration Building
1624 Lonsdale Avenue, Lincoln, RI
A. Heating & Ventilating System
1. Description of existing heating system
The existing heating system consist of one H.B. Smith 350 gas fired boiler burner unit with a capacity of 800 M.B.H. Throughout the building are seven wall mounted thermostats wired to seven zone valves, which serves baseboard radiation. The piping system is all copper piping and fittings.
2. Condition of existing mechanical equipment.
Existing boiler burner unit and associated heating equipment appears to be in satisfactory condition. There are no signs of major deterioration.
B. Plumbing System
1. System deficiency
There is no handicap restroom, but is handicap access to building.
2. Recommendations for improvements
Provide one handicap unisex toilet room.
3. Estimated cost for improvements
New Toilet and lavatory
Approximated Estimated Cost $ 1,500.00
C. Electrical Systems
1. Condition and capacity of existing electrical service.
The existing electrical service to the building is a 300-amp 120/208 volts three phase system.
2. Recommendation for Improvements
Update existing 300-amp service to 600-amp 120/208 volts three phase service.
3. Estimated cost for improvements
New electrical service
Approximated Estimated Cost $ 6,000.00
(End of Report)
Prepared by:
R. L. Horridge & Associates, Inc.
601 Jefferson Boulevard.
Warwick, Rhode Island, 02886
Raymond L. Horridge, P.E.
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