B08__Attachment_5_Revised_PORE_Lodge_Boiler_Construction_Specifications_0001.pdf

POINT REYES NATIONAL SEASHORE

Point Reyes Station, California

Replace Limantour Lodge Boiler Heating System

CONSTRUCTION SPECIFICATIONS

NATIONAL PARK SERVICE (NPS)

Point Reyes National Seashore

April 13, 2026

Revised: September 9, 2026

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SECTION 23 52 00 – RESIDENTIAL PROPANE-FIRED BOILER

PART 1 – GENERAL

1.1 SUMMARY

A. This Section specifies a propane floor mounted boiler heat system to be installed at Limantour Lodge on the Point Reyes National Seashore, California.

B. The existing malfunctioning boiler system is to be removed and disposed of in a legal manner.

An optional item will be to remove the existing hot water heater heated by water from the existing boiler, capping lines cut, and disposing of the hot water heater in a legal manner.

C. Installation of the new system shall include all piping, wiring, ducting, and electrical system upgrades needed to install the new boiler to function effectively. This will include replacing the 4-zone manifold, isolation valves and actuators and adding a feed water system to maintain the correct water pressure in the boiler. The tank for the feed water system should be filled with distilled water to flush the system, and an additional 12 gallons of distilled water should be left onsite for ongoing use.

An optional item will be to furnish and install a domestic hot water heater to be heated by the boiler and plumbing the hot water heater into the existing plumbing system.

D. Provide and install one (1) propane-fired, high-efficiency, condensing hot water boiler for residential space heating which will include:

1. Floor standing 95% efficient fire tube boiler with stainless steel heat exchanger converted to propane

2. Pump isolation valves

3. New 4 zone stainless steel manifold, actuators and zone valves

4. New PVC flue pipe

5. New condensates drain

6. New boiler pump

7. Electrical for pumps and line power

8. Surge protector

9. Control electrical connection

10. All necessary boiler piping using type L copper tube

11. Minor boiler re-piping as needed

12. New air vent

13. New fill valve

14. All piping will be insulated with closed cell foam pipe insulation

15. Recycling of all existing equipment

E. Basis of Design:

Boiler

• Manufacturer: Lochinvar

• Series: Knight Fire Tube

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• Model: KHB0110L -101

• Fuel: Propane (LP)

• Maximum Input: 110,000 BTU/hr

Hot Water Heater

• Manufacturer: Lochinvar

• Series: Squire Indirect Tank

• Model: SIT080

• Heat Source: Boiler Water

• Capacity: 80 Gallons

F. System shall include controls, venting, drainage, hydronic accessories, and all appurtenances necessary for a complete and operable installation.

1.2 DEFINITION OF CONTRACT LINE ITEMS

A. Contract Line Item 1 – Remove and replace the existing malfunctioning boiler system as specified. This item includes submittals, environmental protection, and services to remove and dispose of the existing boiler system and replace it with the boiler system specified.

Measurement for payment will be compliance with the construction documents and certification that the system has been installed and is functioning for the required purpose. No measurement will be made of quantities for payment. Payment shall be by lump sum. Lump sum price for this bid item shall be considered as including all labor, equipment, materials, and incidentals to complete the specified work.

B. Optional Contract Line Item 1 – Remove the existing hot water heater, cap all lines cut, and dispose of the hot water heater in a legal manner.

Measurement for payment will be compliance with the construction documents and certification that the hot water heater has been removed and disposed of in a legal manner. All lines cut shall be capped and the boiler system should be functioning for the required purpose. No measurement will be made of quantities for payment. Payment shall be by lump sum. Lump sum price for this bid item shall be considered as including all labor, equipment, materials, and incidentals to complete the specified work.

C. Optional Contract Line Item 2 – Remove the existing hot water heater and furnish and install the hot water heater specified and plumb it into the existing system so that it is heated by water from the boiler and supplies hot water to the facility.

Measurement for payment will be compliance with the construction documents and certification that the existing hot water heater has be removed and disposed of in a legal manner, and that the specified hot water heater has been installed and is functioning for the required purpose. No measurement will be made of quantities for payment. Payment shall be by lump sum. Lump sum price for this bid item shall be considered as including all labor, equipment, materials, and incidentals to complete the specified work.

Note: Either Optional Item 1, Optional Item 2, or neither will be exercised. Both optional items will not be exercised together.

1.3 REFERENCES

Comply with the latest adopted editions of:

• International Mechanical Code (IMC)

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• International Fuel Gas Code (IFGC)

• NFPA 54 – National Fuel Gas Code

• NFPA 58 – Liquefied Petroleum Gas Code

• ASME Boiler and Pressure Vessel Code, Section IV

• ANSI Z21.13 / CSA 4.9 – Gas-Fired Low-Pressure Boilers

• NPS Director’s Orders #50B

1.4 SUBMITTALS

A. Product Data:

• Manufacturer’s cut sheets

• Venting and combustion air requirements

• Electrical characteristics and control logic

B. Shop Drawings:

• Piping connections

• Vent and combustion air routing

• Drainage piping routing

• Control wiring schematic

C. Operation and Maintenance Manuals.

1.5 QUALITY ASSURANCE

A. Boiler shall be factory-assembled, tested, and listed by a nationally recognized testing laboratory.

B. Hot water heater shall be factory assembled, tested and listed by a nationally recognized testing laboratory.

C. Installer shall be qualified and experienced with condensing propane-fired hydronic boilers.

PART 2 – PRODUCTS

2.1.A BOILER

A. Type:

High-efficiency, condensing, sealed-combustion, propane-fired hot water boiler.

B. Construction:

• Fire-tube heat exchanger constructed of stainless steel

• Fully insulated steel jacket

• Floor-mounted configuration

C. Performance:

• Maximum Input: 110,000 BTU/hr

• Thermal Efficiency: ≥95% AFUE

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• Turndown Ratio: Minimum 10:1

• Maximum Allowable Working Pressure: 50 psig

• Maximum Operating Temperature: 190°F

D. Combustion System:

• Fully modulating, pre-mix burner

• Electronic ignition

• Designed for LP (propane) fuel

E. Electrical:

• 120V, single-phase power

• Integrated low-voltage controls

F. Listings and Certifications:

• ASME Section IV

• ANSI Z21.13 / CSA 4.9

2.1.B HOT WATER HEATER

A. The water heater shall have vertical construction with a capacity of 80 gallons.

B. The water heater shall be constructed of 316L stainless steel with a 316L stainless steel coil. The coil and the interior of the tank shall be subjected to a passivation process designed to inhibit corrosion by cleaning the coil and tank surfaces and washing away iron that was exposed during the manufacturing process. The tank shall be furnished with two 1" NPT connections for boiler supply and return piping.

Domestic water tapings shall be 1.5" NPT.

C. The water heater shall have a working pressure of 150PSI and shall be equipped with a tapping in the tank for temperature and pressure relief valve installation and a bulbwell in the side of the tank for utilizing a controlling sensor or aqua-stat. The water heater shall carry a limited lifetime warranty against tank failure resulting from defects in materials or workmanship.

D. The water heater shall be constructed with a dent resistant poly-propylene jacket assembly, with a thickness of .055". The tank assembly shall be completely encased in a minimum of 2" thick, high density, CFC/HCFC free polyurethane foam insulation to exceed the energy efficiency requirements of the latest edition of the ASHRAE 90.1 Standard.

2.2 CONTROLS AND SAFETIES

A. Factory-integrated microprocessor-based control system including:

• Adjustable supply water temperature setpoint

• Outdoor air reset capability

• Boiler pump control

• Domestic hot water priority capability (if applicable)

B. Safety Devices:

• High-limit temperature control

• Low-water cutoff

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• Pressure relief valve (ASME-rated)

• Flame safeguard with lockout

2.3 VENTING AND COMBUSTION AIR

A. Venting:

• Category IV, positive-pressure venting system

• Schedule 40 PVC, CPVC, polypropylene, or stainless steel venting as approved by manufacturer and code

B. Combustion Air:

• Direct-vent sealed combustion system

• Combustion air piping sized per manufacturer requirements

C. Vent and air terminations shall be located to minimize visual impacts and comply with clearance requirements.

2.4 HYDRONIC ACCESSORIES

A. Circulator Pump:

• High-efficiency ECM type, sized for system requirements

B. Expansion Tank:

• Diaphragm-type, properly sized for system volume

C. Additional Components:

• Air separator and automatic air vent

• Isolation valves and unions at boiler connections

• Backflow preventer and pressure-reducing fill valve

2.5 PROPANE GAS PIPING

A. Gas piping shall be sized for 110,000 BTU/hr input, propane service.

B. Materials shall comply with IFGC and NFPA 58.

C. Provide:

• Manual shutoff valve within 6 feet of boiler

• Sediment trap at boiler inlet

• Gas pressure regulator as required by propane supplier

PART 3 – EXECUTION

3.1 INSTALLATION

A. Install items in accordance with manufacturer’s instructions and applicable codes.

B. Maintain minimum clearances for service access and airflow.

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C. Coordinate propane supply and electrical connections.

3.2 FIELD QUALITY CONTROL

A. Pressure test gas piping prior to connection.

B. Fill, purge, and balance hydronic system.

C. Verify proper venting, combustion air, and condensate drainage.

3.3 STARTUP AND COMMISSIONING

A. Startup shall be performed by a manufacturer-authorized technician.

B. Adjust combustion and controls for propane operation.

C. Verify modulation, safeties, and system response.

3.4 TRAINING

A. Provide operational and maintenance training to NPS personnel.

PART 4 – NPS-SPECIFIC CONSIDERATIONS

A. Equipment shall be selected for reliability and serviceability in remote park locations.

B. Replacement parts shall be readily available through U.S.-based suppliers.

C. Venting and exterior penetrations shall be coordinated with park staff to minimize impacts to building appearance and historic fabric where applicable.

D. Installer shall provide manufacturer’s warranty information and a one-year workmanship warranty to

NPS.

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