legionella presentation solar boston-2.pptx...
TRANSCRIPT
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RL Stone CompanyDomestic Hot Water Systems Advances & Concerns in the Hospitality Sector
Presented byChristopher Bove
1-800-836-3690RL Stone Co - Domestic Hot Water
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RL Stone Co - Domestic Hot Water
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– Good & Friendly Service– Connectivity– Cleanliness– Safety– Predictability
What Do Today’s Guests Want In Your Hotel
RL Stone Co - Domestic Hot Water
- Comfortable Beds- Plentiful Hot Water
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Presentation Position StatementInstitutional Hot Water System Design, Operation and Maintenance Must Always Include an Integral Legionella Risk Reduction and Enhanced User Safety Precaution with an Appropriate Ongoing Action Plan.
RL Stone Co - Domestic Hot Water
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What is Domestic Hot Water• Potable hot water which is used for drinking, food preparation, sanitation and personal hygiene.• System equipment generally consists of:
– Hot Water Generator– Distribution Piping– Circulation & Booster Pumps– Temperature Control– Point of Use Fixtures
RL Stone Co - Domestic Hot Water
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Hot WaterWhen you Want it, Wherever you Want it
Domestic Hot Water System
RL Stone Co - Domestic Hot Water
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Owners Concerns• Initial Cost – NSF 61 Energy Cost• Maintenance Cost• Water Cost• Risk Avoidance
– Scalding– Legionella
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• New York State DOH Adopts ASHRAE Standard 188-2015 for Cooling Tower Management– No longer voluntary compliance– By 9/17/15 cooling towers need to be registered, inspected, tested and react to findings– By 12/31/15, towers cleaned and certified– By 3/1/16 a plan based on ASHRAE 188-2015 needs to be formalized and implemented
RL Stone Co - Domestic Hot Water
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• The bacteria’s natural habitat is WATER• Drinking Legionella bacteria is something we all do, probably every day• It’s breathing moist aerosolized air with Legionella in it that can cause problems• Estimated up to 18,000 hospitalized cases every year. 5-30% are fatal (CDC).• Legionella outbreaks have increased 323% in the last 10 years over the previous 10 (CDC)• NY DOH 2006 Guidelines makes 1 case an outbreakRL Stone Co - Domestic Hot Water
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Who Does Legionella Affect
• Smokers• Elderly people• Immunocompromised• People with Respiratory problems• Pneumonia-like Symptoms
RL Stone Co - Domestic Hot Water
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Cooling Towers Get The Attention• The name Legionnaires disease comes from a cooling tower outbreak in Philadelphia 1976 at an American Legion conference • Fall River MA 1993• PittsburghVA 2009• Aria Hotel In Las Vegas 2011• Springhill Suites Altamonte Fla 2015• More recently 8/15, in the South Bronx 119 people were infected and 12 died
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The Bigger Concern• Domestic Water Systems• CDC Estimates that 80% of the LD cases come from domestic water systems
– 21% Hotels– 23% Healthcare– 56% from all other facilities
RL Stone Co - Domestic Hot Water
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We’ve Created Excellent Homes• Plumbing systems are a good environment for harboring and growing Legionella• Legionella will grow between 68F and 122F water temperature• Stagnant or low movement in the water
– Dead legs, aquastat controlled recirculation pumps, hot water storage tanks• Biofilm on plumbing pipe walls protects Legionella Colony
RL Stone Co - Domestic Hot Water
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ASHRAE 188-2015 for Potable WaterLegionella: Risk Management for Building Water Systems• ASHRAE 188-2015 says that facilities meeting any one of the following requirements must implement a Water Management Plan WMP
– Multiple Housing units with a central hot water system– More than 10 stories– Housing designated for people over 65– Patients staying more than 24 hours– Whirlpool or Spa– An area housing or treating people with certain medical risk factors….
RL Stone Co - Domestic Hot Water
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ASHRAE 188-2015 for Potable WaterLegionella: Risk Management for Building Water Systems• Provides a Framework: Not Specific Control Measures• Each Facility must come up with its Own Control Measures• The ONUS is on you!!!
RL Stone Co - Domestic Hot Water
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System Design Best Practices• If water must be stored, it should be at 140F or higher• Minimize dead legs in piping• Avoid stagnant water in system (keep recirculation pumps running)• System temperature is recommended circulate at 140F, and blend before point of use.
RL Stone Co - Domestic Hot Water
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What Does a WMP(Water Management Plan) Consist Of• Program Team - Assign a team responsible for program development• Develop water system flow diagrams and schematics• Evaluate where hazardous conditions may occur• Control Measures - Determine where and what control measures should be implemented• Monitor control measures and take corrective actions to maintain limits• Confirmation – Form procedures to confirm the program is being implemented and working• Documentation – Establish procedures to communicate and document activities
RL Stone Co - Domestic Hot Water
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Control Measure Options• Hypercholorination
• Ultraviolet Rays• Chlorine Dioxide
• Copper Silver Ionization• Superheat and Flush
RL Stone Co - Domestic Hot Water
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Legionella - Your Risk and Exposure• The Law for your Guest: There is no law but if Legionella occurs your are at risk for litigation for personal injury, negligence, medical expenses, lost income, pain, and emotional distress. If your loved one died, your family may have a wrongful death claim.• The Law for your Employees: The law requires employers to provide their employees with safe and healthful workplaces.• In any case Approved Codes of Practice exist (which the do now and recently) they must be followed or you must do more!
– ASHREA– CDC– OSHA RL Stone Co - Domestic Hot Water
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Legionella - Your Risk and Exposure• What you must do:• Under general health and safety law, as an employer or person in control of a premises you have health and safety duties and need to take suitable precautions to prevent or control the risk of exposure to legionella. • Details of the specific law that applies can be found in part 1 of Legionnaires’ disease: The control of Legionella bacteria in water systems. Carrying out a risk assessment is your responsibility and will help you to establish any potential risks and implement measures to either eliminate or control risks.• ASHRAE 188 Guidelines
RL Stone Co - Domestic Hot Water
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How Can We Achieve Our Legionella Prevention & Business Cost Goals With All These Concerns?
RL Stone Co - Domestic Hot Water
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Understand our Typical Daily Water Demand
12 3 6 9 noon 3 6 9 12
1
2
3
4
5
Time in HoursRL Stone Co - Domestic Hot Water
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Legionellae and Temperature• Below 68F Legionellae can survive but are dormant• Legionellae growth range (68F - 122F)• Ideal growth range (95F - 115F)• Above 122F Legionellae can survive but do not multiply• At 130F Legionellae die within 5 to 6 hours• At 140F Legionellae die within 32 minutes• At 150F Legionellae die within 2 minutes• Disinfection range (158F - 176F)
RL Stone Co - Domestic Hot Water
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Safety IssueSafety Issue
140ºF.140ºF.
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Temperature/Time Burn ChartTemperature in F
110°F118°F122°F131°F140°F149°F158°F
Time for 1st degree burn5 hours10 minutes1 minute5 seconds2 seconds1 second -------
RL Stone Co - Domestic Hot Water
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What are We Seeing Being Done with Equipment in the DHW Systems in Hospitality Market
RL Stone Co - Domestic Hot Water
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Recent Trends in HW Generation– Reduction / Elimination of Tanks– Instantaneous Heaters– High Efficiency Gas Water Heaters
• 1995 normal eff = 83%• 2015 normal eff = 95%+
– Solar Supplement– Packaged Solutions– Many of the Above Qualify for
Utility IncentivesRL Stone Co - Domestic Hot Water
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Feed-Forward Steam Instantaneous Water HeaterCompactQuick Reaction to Demand ChangesAccurate & SafeEasy to MaintainEasy to InstallNo External Utilities
RL Stone Co - Domestic Hot Water
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Flo Rite Temp
The Brain
BASIS
“Packaged Solution”
RL Stone Co - Domestic Hot Water
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Recent Trends in HW Distribution– Properly Sized Pipes: Low Noise, Low Friction, Less Erosion– Insulation– ECM Pumps – up to 75% Energy Savings– Utility $$$– Need to fix
crossovers
RL Stone Co - Domestic Hot Water
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Trends We See In Our DHW System• Master Control:
– Digital Mixing Valves• Accurate Control +/- 2F • Extremely Safe• Connectivity• Low Maintenance – Especially with Hard Water
RL Stone Co - Domestic Hot Water
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Digital Mixing Valve Thermostatic Mixing Valve
Warranty 5 Years all Components Warranty 1 Year from ship dateDigital readout of setpoint and Outlet Temperature Gauges in mixed outlet Commissioning: Plug the valve in Set low flow and then high flow with and
without pump runningInternally checks itself every 4 Seconds Dependent on nothing in the system changing
from start upBrainScan® true interface with ability to remote Single RTD installed to see the mixed outlet adjust temperature no interaction with valveBrainScan® saves a snapshot to memory every 15 min. No information to suggest it saves information
RL Stone Co - Domestic Hot Water
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Remote Set Point Adjustment
PC/BAS Interface
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Digital OfferingDRV40 DRV40R
DMC40BS DMC40-40BS
DRV80 DRV80R
DMC80BS DMC80-80-80BS
RL Stone Co - Domestic Hot Water
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148.00151.00 153.00147.00
100.00102.00104.00106.00108.00110.00112.00114.00116.00118.00120.00122.00124.00126.00128.00130.00132.00134.00136.00138.00140.00142.00144.00146.00148.00150.00152.00154.00156.00158.00160.00162.00
1 94 187 280 373 466 559 652 745 838 931 1024
1117
1210
1303
1396
1489
1582
1675
1768
1861
1954
2047
2140
2233
2326
2419
2512
2605
2698
2791
2884
Hot Water Temp to DRV80 Cold Water Temp to DRV80Guest Loop Temperature
Before suspected lowered calorific value change in the gas feeding the water heaters.
Readings per hour (BrainScan®) 4Readings per 24 hr. cycle 96Readings since commissioning (est.) 119,808November 18th 2012Internal Checks (DRV80-The Brain®) 15Internal Checks per hour 900Internal Checks per 24 Hr. cycle 21,600Internal Checks per Month 648,000Internal Checks since commissioning 26,956,800Averaged Hot Water Feed Temperature 149.53Averaged Cold Water Feed Temperature 108.90Averaged Mixed Outlet to Guest Loop 122.04Temp Difference in degrees cold/mixed to loop 13.14Total adjustments made to The Brain® 0Total Cost to service The Brain® $0.00 Total cost for repair parts $0.00 Total Days In Operation 1,248Remaining Warranty 577Total operating hours 29,952Commissioned June 19, 2009
Keeping Water Hot, Safe and Comfortable
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Case Study – Digital Mixing Valve Performance
• Springhill Suites Columbia, MD 04-06-2015.xlsx
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RL Stone CompanyOffices Across New York and New England
www.rl-stone.comChristopher Bove
RL Stone Co - Domestic Hot Water