2.2.1b Attachment 1 Statement of Work.pdf

Statement of Work for

Tank and Pump System

1. General

Upon recommendation by the Fire Administrator, the FEMA Administrator directed the development and inclusion of Residential Fire Sprinkler System(s) (RFSS) in all new Manufactured Housing Units (MHUs) procured by FEMA. In order to provide a system capable of deployment anywhere in the contiguous United States, a standardized water supply system consisting of a water storage tank a pump, and ancillary controls must be provided.

2. Scope

FEMA will provide a Tank and Pump System (TPS) with each MHU to comply with the requirements of NFPA 13D and applicable local codes and ordinances. Depending on the design of a particular MHU, FEMA will use either a TPS that is installed outside of the MHU (i.e., an External TPS), or a TPS that is installed in a dedicated closet inside the MHU (i.e., an Internal TPS) to provide the required water supply and pressure for the residential fire sprinkler system.

External and Internal TPS units are not interchangeable; the requirements for External and Internal TPS units are similar yet distinctly different and, in the case of some features, mutually exclusive.

This Statement of Work contains distinct requirements for the three elements of the program listed below. Offerors may respond to any or all these three elements but must clearly state which set of requirements they are proposing to meet.

Provide new External TPS units, Provide new Internal TPS units, and

Enhancement, Refurbishment, Inspection, Repair, Maintenance, and Technical Support for TPS units, which will include both External and Internal TPS units.

TPS units must meet stringent requirements to ensure compliance of the overall system with the applicable codes and standards and with FEMA’s unique mission requirements. The requirements for TPS units include minimum water flow rate, minimum water pressure, operational protocol, environmental requirements, dimensional requirements, and various related requirements. Detailed requirements for each of these three elements, are presented in the following sections of this document.

A. General Requirements for NFPA 13D Compliant Tank and Pump Systems

B. Requirements for External Tank and Pump Systems

C. Requirements for Internal Tank and Pump Systems D. Requirements for Inspection, Repair, Maintenance, Enhancement, Refurbishment and Technical Support of Tank and Pump Systems (includes both External and Internal Tank and Pump systems)

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Requirements for NFPA 13D Tank & Pump Systems Revision A-A

Page A- 1

FEDERAL EMERGENCY MANAGEMENT AGENCY

PART A

December 15, 2022

GENERAL REQUIREMENTS

for

NFPA 13 D COMPLIANT

TANK & PUMP SYSTEMS

Revision A-A

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Page A- 2

A. General Requirements

A.1 Overview

FEMA’s Tank and Pump Systems (TPS) are Life Safety systems subject to the jurisdiction and regulatory requirements of fire and life safety officials wherever the TPS has been deployed. Regulatory requirements vary across the Nation. The requirements in this Contract were developed to comply with as many of the extant regulatory requirements as possible.

FEMA equips Manufactured Housing Units (MHUs) used as temporary housing for disaster survivors with residential fire sprinkler systems. The sprinkler systems are designed and installed to comply with National Fire Protection Association (NFPA) Standard for the Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes - NFPA 13D. The systems must also comply with local codes and ordinances applicable in the jurisdictions where the MHU and TPS are installed.

FEMA will provide a TPS with each MHU to ensure a consistent and adequate water supply for the residential fire sprinkler system to comply with the requirements of NFPA 13D and applicable local codes and ordinances.

Depending on the design of a particular MHU, FEMA will use either a TPS that is installed outside of the MHU (i.e., an External TPS), or a TPS that is installed in a dedicated closet inside the MHU (i.e., an Internal TPS) to provide the required water supply and pressure for the residential fire sprinkler system. External and Internal TPS units are not interchangeable; the requirements for External and Internal TPS units are similar yet distinctly different and, in the case of some features, mutually exclusive.

This Contract contains distinct requirements for three elements of the program listed below. Offerors may respond to any or all of these three elements but must clearly state which set of requirements they are proposing to meet.

o Provide new External TPS units, o Provide new Internal TPS units, and o Enhancement, Refurbishment, Inspection, Repair, Maintenance, and Technical Support for TPS units, which will include both External and Internal TPS units.

The requirements for both External and Internal TPS units have been revised from previous versions.

FEMA can use this contract to meet requirements of the manufactured home mission or any other legal mission assigned to FEMA.

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Page A- 3

A.2 Qualifications

Offerors must demonstrate a thorough understanding of the fire and life safety codes and standards applicable to residential fire sprinkler systems, fire pumps, and related subsystems in order to be considered qualified to perform this work.

Offerors must submit detailed qualifications to show compliance with FEMA’s requirements as required below.

New TPS units. Offerors proposing to provide new External and/or Internal TPS units shall provide evidence of not less than ten (10) years’ successful work in the provision of water supply systems for NFPA 13D compliant residential fire sprinkler systems.

Enhancement, Refurbishment, Inspection, Repair, Maintenance, and Technical Support Services: Offerors proposing to provide these services shall provide evidence of not less than five (5) years’ experience in performing these services on FEMA’s TPS units.

Experience with NFPA 13D water supply systems and electronic control systems that are similar to FEMA’s TPS units may be substituted for experience with FEMA’s TPS systems if approved by FEMA. Offerors wishing to substitute alternate qualifications for FEMA’s consideration must provide sufficient detail to substantiate the assertion of similarity of the complexity of the work and the systems to the complexity of FEMA’s TPS systems. Submit details of experience, including details of the similarity to the plumbing and electrical components of FEMA’s TPS systems, for FEMA’s review and possible approval.

Firms that provided FEMA’s existing TPS systems are considered to have fulfilled this requirement.

Field Service Technicians. Technicians performing field service work shall have not less than three (3) years of experience installing, troubleshooting, and repairing FEMA’s TPS systems.

Experience installing, troubleshooting, and repairing similar NFPA 13D water supply systems and electronic control systems may be substituted for experience with FEMA’s TPS systems when approved by FEMA’s COR. Details of experience including details of the similarity of the prior work to the plumbing and electrical components of FEMA’s TPS systems must be submitted in writing for FEMA’s review and approval.

Technicians should also have experience teaching how to troubleshoot and repair the TPS systems.

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External Tank and Pump System Requirements Revision D - A

Page B- 1

FEDERAL EMERGENCY MANAGEMENT AGENCY

Revision D - A

November 28, 2022

PART B

REQUIREMENTS FOR

EXTERNAL

TANK & PUMP SYSTEM

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Page B- 2

B. EXTERNAL TANK & PUMP SYSTEM.

B.1: General Requirements.

The external TPS shall provide a pressure and flow rate of no less than 50 psig at 30 GPM.

Pressure and flow shall be measured at the end of the 1-1/2” diameter x 30 feet long flexible water hose, five feet above the level of pump discharge.

The external TPS shall require only two connections to the MHU: 1) the electrical connection which will provide power to the external TPS from the MHU; and 2) a water connection that will provide the water required to the NFPA 13D fire sprinkler system in the MHU.

The external TPS package shall be a fully integrated subsystem that when mated to an NFPA 13D fire sprinkler equipped manufactured home, the MHU and the external TPS shall be fully NFPA 13D compliant without the need to connect the MHU sprinkler system to either the public water system or well water.

The external TPS shall be fully assembled and tested when delivered to FEMA.

Installation shall be able to be completed at the site where the manufactured home is installed using standard hand tools. If any special tool is required for installation, it shall be included as a part in the TPS parts kit.

The external TPS shall come equipped with a thermally protected (meeting the requirements set forth below) flexible water hose assembly that shall be used to attach the external TPS to the sprinkler riser on the underside of the manufactured home.

The water hose assembly shall be shipped inside the external TPS enclosure fully prepared to be easily connected to the MHU and the external TPS. The water hose assembly shall be shipped not connected to either the water or electrical components inside the external TPS. Quick-connect connections are required for all electrical connections, and camlock fittings are required for the hose.

The external TPS shall be designed to operate from a single phase, 30-amp, 240 Volt, 60 Hz electrical service utilizing IEC 60-309-2 pin and sleeve connections.

The external TPS shall have a low temperature alarm that activates if either the temperature inside the external TPS or the temperature of the flexible hose assembly drops below 40°F. The alarm shall be audible and visual and shall have a ‘silence’ or ‘mute’ feature for the audible alarm. The silence feature shall turn off the audible portion of the low temperature alarm for a fixed time period.

The external TPS shall have pump running alarm that activates when the pump is running.

There shall be a delay in alarm operation after pump start to preclude nuisance alarms due to pressure maintenance operation. The alarm shall be audible and visual and shall

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Page B- 3 have a ‘silence’ or ‘mute’ feature for the audible alarm. The silence feature shall turn off the audible portion of the low temperature alarm for a fixed time period.

The external TPS shall be protected against tampering and shall be accessible for testing and service. The door to the external TPS shall be secured by a dead-bolt lock or padlock keyed as described herein.

The external TPS shall have a pump test loop that flows not more than 14 GPM to simulate activation of a single sprinkler. The orifice size in the test loop shall be determined based on the water pressure available inside the TPS. Operation of the test loop shall activate the fire alarm(s) after an appropriate delay designed to preclude nuisance alarms during pressure maintenance operations. The test look shall return water to the storage tank.

The external TPS system shall be designed to be installed directly on the ground. The external TPS shall be fully functional when installed on a base or pad where the grade varies by not more than four (4) inches over the length and/or width of the external TPS enclosure, in either one dimension or in both dimensions simultaneously.

The external TPS shall include features allowing the external TPS to be secured to the ground using standard MHU anchor straps.

The external TPS shall have an integrated skid/base that serves as a stable base for shipping and installation. The skid/base shall be fabricated of materials suitable for rough handling including being pulled across uneven flooring with a pallet puller. The skid/base shall be suitable for exposure to the elements while stored outdoors in South Texas for up to ten (10) years and shall be suitable for continual immersion while the unit is connected to an MHU. Wood, including pressure treated wood is not an acceptable material for the skid/base portion of the external TPS.

The external TPS shall be capable of being lifted and transported by standard length (42 inch) forklift tines. Channels for the forks on the underside of the external TPS shall not be less than 4 inches high nor less than 8 inches wide to allow clearance for the entry of the tines. Channels shall be provided so that the external TPS unit can be forked from all four sides.

The external TPS shall be designed and equipped to be lifted by a crane, hoist, or other lifting device. A minimum of three sling attachment points shall be permanently installed above the center of gravity. Any two of these lift points shall be structurally capable of carrying the entire weight of the empty external TPS (as shipped). The external TPS O&M manual shall describe the required sling(s) specifications, spreader bar length (if required), external TPS weight, external TPS center of gravity location, lifting points, and procedures that will permit safely lifting of the unit in full compliance with OSHA requirements.

All key components including the pump, control panel, electrical components, etc. shall be removable if service or replacement is required in the field.

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Page B- 4

IEC 603-09-2 Pin and Sleeve connectors shall use pin pattern standard for 4 wire, 30 AMP, Single Phase, 12-hour ground position (per IEC 60 309-2 “Clock), power. Similar to Leviton 430B12W.

The external TPS exterior shall be designed to make it difficult for an individual to climb onto the roof. No toe or foot holds should be present on the walls or door. Protrusions exceeding ½ inch from the plane of the wall surface are strongly discouraged.

The external TPS exterior shall be designed to minimize damage during transportation of the external TPS unit. Door pulls, deadbolt locks, pass-through covers, and other elements of the unit should be flush mounted to the exterior wall. Protrusions from the wall shall be protected from damage by contact with other TPS units during storage and/or transport. Extending the skid/base beyond the plane of the wall is one acceptable method to protect protruding elements from damage during transportation and handling.

The external TPS shall be fabricated with an integral skid/base designed to support the weight of a fully loaded external TPS. See Diagram 1.

It is common that the water source used to fill the TPS at the installation site will contain excessive sediment due to inadequate flushing of the new underground water lines installed to provide water to the MHU. Typically, filling of the TPS tank is the first significant use of the new water line, and that sediment flows into the TPS. Requirements herein are intended to mitigate the risk of damage from sediment. Alternative engineering controls to address this situation may be proposed with the limitation that they do not require any additional action by the installation crew.

B.2: Applicable Standards

NFPA 13D Standard for the Installation of Sprinkler Systems in One- and Two-Family

Dwellings and Manufactured Homes.

24 CFR 3285 Model Manufactured Home Installation Standard.

24 CFR 3280 Manufactured Home Construction and Safety Standards.

ANSI A-A-59326.

NEC – National Electrical Code, NFPA 70.

IEC 603-09-2 -international standard from the International Electrotechnical Commission.

MIL-STD-810G, Department of Defense Test Method Standard: Environmental Engineering Considerations and Laboratory Tests

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Page B- 5

B.3: Operating Environment

The external TPS shall be designed to operate year-round anywhere within the contiguous

United States. It shall function as intended in ambient temperatures of

– 35°F to + 120°F, with full exposure to solar radiation. It shall function as intended at any relative humidity between 5% RH and 100% RH.

The external TPS shall be designed to be stored outside without electrical power and without any additional protection from the elements at the temperature and humidity ranges listed above outside for up to ten (10) years without degradation of the unit.

Internal conditions during storage of unventilated external TPS units have been measured at more than 130°F at 100% RH. Testing of similar enclosures by the US military has shown that average internal temperatures during summer can reach 140°F, with peak temperatures of 180°F near the ceiling.

Manufacturer shall clearly state any storage requirements or limitations in the Operations and Maintenance Manual and in their proposal.

FEMA has experienced an unacceptable failure rate in electrical and electronic components of existing external TPS units that have been stored outside for 4 years, observed as corroded terminals and connections and similar temperature/humidity related issues. Offerors shall include features to minimize or eliminate such failures.

Electrical and electronic components pump seals, gaskets, and other materials shall be rated for storage and use in the temperatures that the external TPS may experience during use.

FEMA plans to perform environmental testing of randomly selected external TPS units from each manufacturer. Testing will generally be in accordance with MIL-STD-810G, Method 502.6, Procedure II. Testing will include not less than 24 hours at the extreme ends of the temperature limits described herein. High temperature testing will include solar load equivalent to that in a high-desert environment in Arizona. Submission of calculations or verification of the external TPS ability to operate in the environmental conditions required is not required as part of this solicitation. However, manufacturers will be required to remediate any discrepancies discovered during the environmental testing at no additional cost to the government.

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Page B- 6

B.4: Water Tank

The tank shall have a minimum useable capacity of 220 gallons US.

It shall be easy to check the water level in the tank. The tank shall have clearly visible and prominent permanent markings in a color that contrasts with the color of the tank to indicate maximum and minimum fill levels. Adhesive labels, if used, shall be capable of staying securely in place when exposed to the environmental conditions described above throughout the storage and use.

The tank shall have provisions to direct overfill water to a location where the water will not damage the external TPS or its components.

External TPS design shall include a hard-piped connection suitable for the pump to draw not less than 30 GPM from the tank. Pump inlet shall be located to preclude drawing sludge or debris from the bottom of the tank into the pipe and/or pump; and to prevent siphoning air into the pump inlet, until not less than 210 gallons of water have been delivered to the sprinklers inside the home.

Water tanks shall be designed to be filled manually using a garden hose connected to a standard hose bib on the MHU. The fill connection inside the external TPS shall be equipped with a swivel female connection, gasket, and valve to facilitate connection of the garden hose.

Water tanks shall have a drain valve so that the tank can be drained by gravity when the external TPS is decommissioned. Drain shall be configured to permit removal of all water from the tank, pump, and piping by gravity and without the need for electrical power to the unit. Drain shall be arranged to prevent water spilling inside the TPS.

The water tank shall not be insulated, but a means to ensure that the water inside the tank remains at or above 42°F shall be in integral part of the TPS. Both tank immersion heaters and room heaters for the interior of the external TPS are acceptable. If an immersion heater is used, it shall be configured to shut off when the heating element is not immersed in water.

A sediment filter or spin-down filter shall be provided and installed as part of the tank fill plumbing to prevent passage of very fine sand and grit into the external TPS tank and pipe. Filters shall be rated no larger than 15-microns; screens, if used, shall be rated no smaller than +500-mesh. This can be a simple whole-house sediment filter from a home improvement store. The filter cartridge should be replaceable; screens, if used, should be capable of being cleaned.

The opening at the top of the water tank shall be tamper resistant to dissuade filling the external TPS via the top of the tank instead of the provided fill port.

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Page B- 7

B.5: Pump

The minimum flow rate of the water pump shall be 30 GPM at 50 psig, measured at the far end of the 1-1/2” diameter x 30 ft. long water hose assembly, five feet (5’) above the level of the pump discharge.

Pump shall be not less than 1 HP.

Pump motor shall be 60 HZ, single-phase, 230/240 Volt.

Pump motors shall be enclosed in a minimum NEMA Open Drip Proof (ODP) enclosure.

Pump controls shall include a minimum run time timer. The minimum run time timer shall be set to 2 minutes unless the pump manufacturer recommends a different minimum run time.

B.6: Plumbing

The piping inside the external TPS shall include all hardware and valves necessary to permit a garden hose to easily pressurize the water hose assembly and sprinkler system in the MHU for system filling and pressure testing.

FEMA has encountered municipal water systems that provide 95 psi static pressure. All piping, tubing, and hose that can be pressurized by the garden hose connection shall be hydrostatically tested to not less than 100 psi.

The connection for the water hose to the piping inside the external TPS shall be a metal female Cam Locking connection. Connection shall be shipped with a dust cap securely installed.

Cam-Locking connectors shall comply with the most current edition of Commercial Item Description A-A-59326, General Specification for Coupling Halves, Quick Disconnect, Cam- Locking Type. Connections shall be Class A, Style 2.

Provide two spare gaskets for the Cam-Locking connector with the TPS parts kit. Gaskets shall be suitable for potable water service.

The connection inside the external TPS for the water hose assembly shall be located within easy reach of the external TPS door.

The connection inside the external TPS for the water hose assembly shall be located so that the hose assembly can be easily routed to the exterior through either of the two access panels in the side of the external TPS wall without inducing either undue stress or kinks in the hose.

There shall be a normally open control valve to isolate the hose assembly from the external TPS piping and tank for maintenance.

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Page B- 8

The piping shall be configured to permit replacement of the pump without the need to drain the tank.

The external TPS shall have a water flow alarm test loop that flows not more than 14 GPM to simulate the activation of a single sprinkler. The orifice size in the test loop shall be determined based on the water pressure available inside the TPS, not the pressure at the end of the hose, to ensure proper water flow rate. Operation of the test loop shall activate the fire alarm(s) and allow the water to return to the storage tank.

Pressure gauges, pressure sensors, motor-operated valves, and all other small-orifice devices shall be protected against clogging by a Y-strainer with a US 50 Mesh strainer to prevent clogging of the small passageways.

Sections of pipe containing or leading to system control components, piping material and configuration shall be designed and fabricated to prevent corrosion inside the pipe during long periods of storage. The system shall be configured to permit complete drainage of the pipe by gravity when the system drain valve(s) is open.

Horizontal runs of pipe in sections of pipe containing or leading to pressure sensors, gauges, motor-operated valves, or other components intended to monitor or control the system are discouraged. Where horizontal pipe is proposed for system control piping, manufacturer shall provide in their proposal technical justification for such along with proposed alternative methods to prevent interior pipe corrosion and fouling of the system control components throughout the life of the system.

The use of solenoid operated valves is not acceptable.

B.7: Control Panel

The external TPS shall include all system control and test features required by NFPA 13D, as well as those other features included in this document.

The external TPS shall include all controls for the thermal protection system of the interior of the TPS.

The external TPS shall include all controls required for the thermal protection system required for the flexible hose assembly between the external TPS and the MHU. The thermostat or temperature sensor attached to the hose shall be located on the hose to preclude location below grade or inside the unit when the external TPS is installed. See Diagram 5.

The external TPS shall include all controls for the alarm system included in the TPS.

To ensure ease of installation, the external TPS controls and systems shall be designed to be activated by a single switch that will initialize all systems and components of the TPS.

Onsite programming as a normal startup procedure of the external TPS is prohibited.

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Page B- 9

When heaters with built-in thermostats are used, the thermostat set point required to maintain the external TPS temperature shall be clearly marked in contrasting colors on the heater and annotated in the Operation and Maintenance manual.

Pressure switches, water flow switches, thermostats, and any other device that can be adjusted shall be adjusted for proper operation at the factory. The startup instructions shall not require the installer to make any adjustments as a normal course of action. The troubleshooting section of the operation and maintenance manual should clearly describe when adjustments are necessary and how to perform them.

B.8: Pressure Sensors

Either standard pressure switches or pressure transducers may be used in the TPS subject to the requirements below. Pressure sensors should have a fluid connection of not less than ¼ inch diameter.

Replacement pressure sensors must be readily available. TPS manufacturer shall identify and successfully test not less than two commercially available sensors from different manufacturers that can be used in the TPS without the need to rewire or reprogram the PLC. These shall be listed in the parts breakdown in the O&M manual provided with the TPS, and the TPS manufacturer shall commit to maintaining in inventory of replacement sensors.

Pressure sensors shall be installed in the TPS plumbing system in a position and location so that it is not possible for liquid water to pool inside the sensing port or opening of the sensor when the TPS is drained of water using the system drain valves and draining instructions provided in the operations and maintenance manual. The intent of this requirement is to reduce or eliminate the potential for plugging of the sensing port by either (1) microbial growth inside the sensing port or pipe leading to the port, or (2) the buildup of scale or mineral deposits inside the sensing port or pipe. FEMA has no control over the quality of water available at the installation sites, and experience has shown that each of these phenomena has occurred and resulted in failure of the TPS and/or the need for troublesome repairs.

Where pressure transducers are used, the piping configuration shall be configured to reduce or eliminate direct pressure wave influx into the sensing port. Either of the following options may be used to accomplish this, at the discretion of the TPS manufacturer:

o Pressure transducers shall be installed so that the transducer sensing port is separated from the main discharge line by a tee fitting and not less than two pipe elbows, or o A snubber fitting gauge protector shall be installed to protect the pressure transducer from the hydrodynamic forces of pump startup. If snubber fittings are used, the TPS

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Page B- 10 parts kit shall include not less than one spare snubber fitting for field replacement if the original snubber becomes clogged.

If pressure transducers are used, the transducers shall not be installed into the TPS prior to shipment. New-in-box transducer(s) shall be shipped as part of the installation parts kit with each TPS unit, and the installation instructions for the transducers shall be integrated into the O&M manual.

o The pipe opening or port where the transducer is to be installed shall be shipped with a contrasting, brightly colored plug to seal the opening during storage and to make locating the proper opening easier during field installation.

o Pipe thread dope or tape that is required to ensure a leak-free transducer installation shall be pre-installed onto the transducer where the transducer has male threads.

Where a transducer has female threads, the dope or tape required for installation shall be packaged with the transducer.

o Recognizing the fact that the transducer can be easily damaged by over-torquing during installation, a brightly colored tag with appropriate cautionary statements and instructions shall be attached to the transducer by wire or plastic tie so that the installer must remove the tag before the transducer can be installed.

B.9: Enclosure

Diagram 1 illustrates the desired external TPS concept and arrangement.

The external TPS including the water tank; pump; associated piping; electrical system;

heating system; alarm controls; and water and electrical connections shall be fully surrounded by a rigid weather resistant enclosure.

For purposes of this requirement weather resistance shall mean protection against wind, blowing dust, rain, hail & snow, UV light, and temperature during both storage and use.

Protection of the interior components and functionality throughout the life of the unit is required.

The external TPS enclosure shall provide access for maintenance, repair, and testing.

Access shall be provided via a door that permits all normal maintenance activities to be accomplished without disassembly of the enclosure.

The door and door frame shall be dimensionally stable during exposure to the temperature range described herein, as well as during extended periods of use in environments with 100°F and 100% relative humidity. Doors and frames shall not swell, warp, or twist so as to impede operation. Doors shall be operable at all times without the need for undue force.

Doors, door locks, latches, and all other external TPS components shall be operable when the external TPS is installed on an out of level surface, base, or pad where the grade varies

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Page B- 11 by four (4) inches over the length of the external TPS enclosure, in any single plan dimension, and in both plan dimensions simultaneously. Demonstrate out-of-level door, lock, and latch function by performing the out-of-level test on one completed TPS. Test shall be conducted as described in Diagram 2. Test block shall be fabricated from a standard 2x4, 6 inches long. Door performance is acceptable if the lock and latch function during each of the eight tests, and the door can be opened and closed fully with not more than 15 pounds force.

The door to the external TPS shall be equipped with a recessed dead bolt lock and a recessed pull-handle. The lock and pull-handle to open the door shall not protrude from the surface of the door to prevent damage during shipping. Other locking arrangements may be submitted for review and approval by FEMA’s COR.

Lock shall be “SCHLAGE” brand, 6-pin Everest cylinders with a C123 keyway that shall be keyed to a 6-pin combination. The key combination shall be “746105” for all locks required on the TPS.

The enclosure shall be insulated. Insulation shall not be exposed and shall be covered by a rigid or semi-rigid waterproof material, on both inside and outside surfaces. Thermal performance of the enclosure insulation shall be coordinated with the external TPS heating system to provide an integrated freeze-protection system.

Pass-through openings: The enclosure shall have two pass-through openings designed to permit both the insulated hose assembly and the 30 Amp electrical wiring assembly to pass through the wall of the TPS. The openings shall be framed and shall be sealed by a metal plate to prevent intrusion of vermin or water; the plate shall be tampered proof and shall be simple to remove from the frame during the installation process.

The pass-through openings shall be insulated to ensure the integrity of the thermal protection of the external TPS enclosure, both when the pass-through opening is sealed closed, and when the pass-through opening is in use to pass the hose/wire assemblies through the opening.

One pass-through opening shall be located on each side wall of the TPS. The rearmost edge of the pass-through openings shall be located within 12 inches of the wall on the rear (door) side of the TPS. The bottom edge of the pass-through opening frames shall be located not more than 12 inches above the top of the external TPS skid/base assembly / bottom of the external TPS enclosure.

The external TPS shall be provided with one closure device for the pass-through opening.

The closure device shall be simple to install in the pass-through opening after the metal plate is removed. The closure device shall be tampered proof when installed. The closure device shall have a 6-inch diameter PVC pipe flange on the exterior side that will be used by the installation contractor to affix a PVC pipe shroud around the hose assembly during installation. The closure device shall be insulated to maintain the thermal integrity of the enclosure. The PVC pipe flange may be attached to the exterior of the external TPS wall instead of on the closure device at manufacturer’s discretion.

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Page B- 12

The enclosure roof shall withstand a live load of 40 pounds per square foot. Roof shall be designed to resist live loads, applied downward on the horizontal projection.

The external TPS system shall be self-contained. The floor of the external TPS shall be structurally sound and designed to support the external TPS in storage, transportation, and operation.

Skid/Base: The external TPS shall be fabricated with an integral skid/base designed to support the weight of a fully loaded external TPS. See Diagram 1.

The skid/base and external TPS shall be designed to be lifted by a forklift or vehicle equipped with standard length (42 inch) forklift forks. The skid/base shall have a minimum of three evenly spaced bottom deck boards. Deck boards shall be securely attached so that the external TPS will not tip if it is lifted off balance.

The external TPS shall have hooks or lift points at the top to enable safe lifting by a sling.

Lift points to be marked as “For Lifting Only Not for Tie Down” unless unit design allows for use as a tie-down. Include safe lifting instructions, required sling weight capacity and length and external TPS tare weight clearly in the instruction manual.

Clearly identify the center of gravity on the exterior of each side of the external TPS structure by permanent markings.

The external TPS system shall be designed to sit directly on level ground. Typical installation will be on directly on soil. The material used for the portion of the enclosure that is designed to come in contact with the ground shall be suitable for direct ground contact.

A durable document storage case securely fastened shall be securely mounted on an inside wall of the external TPS enclosure, easily accessible from the door opening. Do not install the case on the door. Document storage case shall be a Just rite No. 23304, or similar. One copy of the complete external TPS documentation shall be provided inside this case or packet.

external TPS enclosure shall be aesthetically compatible with the exterior finish of the MHU. Exact match with MHU siding is not required, but exterior fit and finish must not look out of place or attract undue attention. A light grey color is preferred.

The enclosure and all exterior signs or markings shall be designed to be exposed to the weather and sunlight with no monthly maintenance and minimal overall maintenance required for a minimum of ten (10) years. Signs and markings shall be of UV resistant materials that shall not fade over a 10-year exposure.

The external TPS enclosure shall be designed so that it is stable and not “top heavy” when placed in position for use and when configured for transportation. The external TPS shall be capable of resting on a 20% grade without tipping in both the empty (shipping) and full (operational) configurations.

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Any tools provided with the external TPS shall be securely mounted inside the external TPS enclosure.

The external TPS shall be freestanding not requiring the external TPS to be attached to the

MHU.

All wind resisting parts (including, but not limited to, shear walls, diaphragms, ridge beams, and their fastening and anchoring systems), and its components and cladding materials (including, but not limited to, roof trusses, wall studs, exterior sheathing, roofing and siding materials, exterior glazing, and their connections and fasteners) shall be designed by a Professional Engineer or Architect to resist he design wind loads for Exposure C specified in ANSI/ASCE 7–88, ‘‘Minimum Design Loads for Buildings and Other Structures,’’ for a fifty-year recurrence interval, and a design wind speed of 110 mph.

The external TPS shall include provisions to secure the unit to the ground at the final installation site using standard manufactured home anchor strapping as described in 24 CFR 3280 and 24 CFR 3285. It is preferred that the external TPS have engineered locations for strapping installation clearly marked at the roof edge. (A requirement to use MHU roof brackets is acceptable but not preferred.) The designated location of the anchor straps shall not conflict with installation of the PVC pipe in the pass-through openings in the exterior wall of the unit.

If Manufactured Home roof brackets (Diagram 6) are to be used, the required number of roof brackets shall be included in the external TPS parts kit. Instructions for positioning of the strapping on or over the external TPS shall be included in the O&M manual.

All openings in the exterior of the enclosure shall be protected against intrusion of insects, rodents, snakes, and other vermin.

The external TPS enclosure shall be vented to allow replacement air to flow into the enclosure and to prevent buildup of moisture during draining or filling of the water tank.

Provisions to ventilate the enclosure to prevent overheating during hot weather should be provided. Provide a means to maintain the integrity of the freeze protection system. If insulation, plug, or cover is to be installed or removed manually by maintenance personnel to plug the vent in cold weather, it shall be a simple operation. All required materials shall be provided with the TPS. Plugs, covers, etc. shall be designed for multiple uses.

The operation and maintenance instruction shall include detailed instructions for maintenance of the ventilation feature, and shall state that the ventilation feature shall be activated during the monthly maintenance when local daytime temperatures are above 60°F, and the ventilation feature shall be defeated when local daytime temperatures are below 50°F.

Include an instruction placard at the location of the ventilation feature(s) that clearly describes the operation of the feature and the when the feature should be opened and/or closed.

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Page B- 14

The external TPS enclosure shall provide rapid drainage of condensed or spilled water inside the enclosure.

The external TPS enclosure shall be large enough to permit all components and parts required for the installation of the external TPS to be securely stored and shipped inside the enclosure. This includes the insulated hose assembly, the electrical connection assembly, the alarm panel, the small parts kit components, PVC pipe and fittings for the hose shroud, and O&M manual. Ensure that the hose assembly and other parts will not damage system piping or components during handling and transportation. All components and parts shall be securely packaged to prevent damage during shipping and protracted storage.

B.10: Electrical

Electrical power to the external TPS shall be taken from the Mechanical Interlock installed on the outside rear of the MHU. The external TPS will be connected to the MHU via an IEC 60-309-2 pin and sleeve connector.

All electrical connections that must be made-up in the field during installation of the external TPS (i.e., external TPS power supply, heat trace, temperature sensor, alarms, etc.)

shall be made by quick-connect UL Listed electrical connectors. Connectors that are not located inside the enclosure shall either be watertight or shall be located inside a NEMA 3 enclosure to prevent damage to the connection from water leaks.

Each electrical connection shall have a unique locking type connector to preclude incorrect assembly. In addition to the requirement for unique connectors, each connection shall be color-coded. The same size and type of connector may be used for up to two connections if the gender alignment of the two sides of the connector is different.

Wire connectors shall be installed to minimize strain or pull on the wires and the connectors.

The wiring assembly shall be able to pass through the wall of the external TPS via the enclosure penetration in the wall of the TPS.

The AC power connection inside the external TPS shall be a 240V/30A MALE twist-lock connection, installed to reduce strain on the wire and connection.

To ensure ease of installation, all external TPS controls and systems shall be designed to be activated or initialized by operation of a single Main Power switch.

Internal wiring within the external TPS shall include:

The water pump.

The heater.

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Page B- 15

The heat-trace used to prevent the water in the flexible hose between the external TPS and the MHU from freezing.

The heat-trace used to prevent the water in the pipe inside the external TPS from freezing if a separate system is used.

The required alarm and control systems and devices.

A light for the interior of the external TPS for use during maintenance. The light shall be operated by a switch located inside the TPS.

All wires shall be labeled and color-coded. A wiring diagram shall be included in the O&M manual.

Electrical connections within the external TPS shall be made in accordance with NEC.

Main power supply shall be 30 Amp, 240V / 1 Phase / 60 Hz. Conductors shall be clearly labeled as being the main power supply.

Provide a means to recognize and diagnose a problem in the power supply to the external TPS during field installation. Problems that must be identified include low or missing voltage in either power leg, and an open or improperly wired neutral or ground wire. The troubleshooting section of the manual shall include recognition, diagnosis, and corrective action for these power supply problems. Include any test or measurement device necessary to provide this feature.

Provide surge protection for the electrical components in the TPS. Protection against a direct lightning strike is not required.

The external TPS shall automatically restart or reset following an interruption of electrical power. Restart sequence shall be accomplished with no alarms sounding. A service call shall not be required to restart the external TPS or silence alarms following a thunderstorm or power outage.

B.11: Electric Wiring Assembly

Provide an electrical Wiring Assembly. Diagram 3 illustrates the electrical interface components.

Electrical Wiring Assembly shall be rated for 240 volts 30 amps.

The wiring assembly shall have a male IEC 60-309-2 International Pin and Sleeve compliant at the MHU end of the assembly; and shall have a watertight FEMALE twist-lock connection at the external TPS end of the assembly to mate with a matching male twist-lock connector inside the TPS.

The connections shall be rated as watertight IP69K.

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The wire used in the Electrical Wiring Assembly shall be minimum 10 AWG Type VNTC cable suitable for direct bury.

The Electrical Wiring Assembly shall provide not less than 45 feet (± two inches) of cable exclusive of any connections. The cable length shall be measured from the rear of the IEC 60-309-2 connector to the exterior wall of the external TPS enclosure.

The Electrical Wiring Assembly shall be tested to UL183 for the following:

Polarity Testing

Ground-Continuity Testing

Dielectric Voltage-Withstand Testing

B.12: Water Hose Assembly

Provide all parts, equipment, materials, and complete instructions to protect the entire length of the flexible hose against freeze. Freeze protection shall meet the temperature and exposure criteria specified.

The water hose between the external TPS and the MHU shall be manufactured of components and materials acceptable to FEMA. Two acceptable hoses are Superlas Danube 10, and Home Master Masterflex.

The water hose shall be not less than 1½ inches in diameter. The water hose assembly shall be not less than 30 feet long (± two inches), measured from the exterior wall of the TPS, exclusive of any connections. Any hose inside the external TPS enclosure shall not be included in the hose length requirement.

Water hose assembly shall be shipped not connected to allow for ease of installation of the hose assembly through the pass-through. In addition to the differing genders of the cam lock connections, each end of the water hose assembly shall be clearly identified as either the TPS END or the MHU END.

The water hose shall be connected to the MHU and/or external TPS via cam-locking connections. The end of the hose assembly intended to connect to the external TPS shall be equipped with a male cam locking connection. The end of the water hose intended to connect to the MHU sprinkler riser shall have a female cam-locking connection.

Include in the parts kit one 1-1/2-inch male Cam Locking connection to female NPT threads, and one 1-1/2-inch female Cam Locking connection to female NPT threads.

Threaded pipe fittings specified in the Parts Listing shall be shipped in the external TPS parts kit for field use where necessary.

Cam-Locking connectors shall comply with Commercial Item Description A-A-59326D, General Specification for Coupling Halves, Quick Disconnect, Cam-Locking Type.

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Page B- 17

The locking arms on female connectors shall be capable of being locked in the closed position. The use of captive (i.e., attached to the connector by short wire rope) cotter pins to lock the cam arms in the closed position is required. Any of the materials and finishes listed in A-A-59326 are acceptable. Alternate materials, finishes, and locking mechanisms may be used when approved in advance by FEMA.

The end(s) of the hose shall be sealed by a dust cap or plug to prevent intrusion of insects or vermin during shipping, storage, and installation. The dust cap shall be locked in place and shall be additionally secured to the hose assembly by a cable tie (aka zip tie) around the cam arms through the rings.

Heat Trace: The entire length of the water hose shall be protected by approved 240V self-regulating heat-trace. Hose inside the external TPS shall be heat traced.

The heat-tracing shall be specifically “Listed” by a nationally accredited testing laboratory (e.g., Underwriters Laboratory – UL) for use on sprinkler systems. Examples of acceptable heat-trace are: Thermon FLX™ Self-Regulating heat-trace or Raychem® XL-Trace self-regulating heating cable or equal. Heat trace cable shall be ground fault protected.

The external TPS hose shall have an additional ten (10) feet of heat trace cable that extends beyond the MHU end of the water hose. At the final installation site, the end seal will be removed, the heat trace at the end of the water hose will be fished through the insulated sprinkler riser assembly into the home, and a new end seal will be installed.

Heat trace shall be delivered with an end seal kit installed on any end that is not connected to a splice kit…