Transcript Application Example
TANKLESS WATER HEATING TECHNOLOGY
For Commercial Applications
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Why tankless water heaters?
Building a case for tankless:
The key factors that are important:
Energy Efficiency Unlimited Hot Water Cost – Capital & Operating Commercial vs. Residential ROI Sizing & Piping Redundancy Code Alert Modulation Lifespan Warranty www.rinnai.us
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Rinnai’s Global Presence
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Based in Nagoya, Japan
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Established in 1920
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7000 employees worldwide
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Operates in over 43 countries RINNAI’S GLOBAL PRESENCE RINNAI GLOBAL HEADQUARTERS
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Worldwide Leader
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2010 turnover: $3+ Billion
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Rinnai North America North American Headquarters: Peachtree City, GA
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Over 200 direct employees & representatives RINNAI AMERICA HEADQUARTERS
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Rinnai NA has its own CSA certified testing laboratory
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Rinnai North America Products
Rinnai America’s Heating Solutions
Non-Condensing Tankless Water Heaters Condensing Tankless Water Heaters Condensing Hydronic Boilers Hydronic Furnaces
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EnergySaver ® Direct Vent Furnaces
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Commercial Cooking products
Basic Requirements
Gas Delivery pressures range from: 5” wc – 10.5” wc for natural gas 8” wc – 13.5” wc for propane Water pressures requirements: 20 psig – 150 psig (50 psi recommended) Hot & Cold water supply lines to be minimum ¾” piping.
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Sequence of Operation Primary Heat Exchanger Incoming Air
Heat Exchanger Thermistor
FR 2 FR 1 Exhaust Secondary Heat Exchanger Igniter 1. Water flow begins SV2 SV1 SV4 SV3 2. Ignition Sequence 3. Normal Operation Burner Sensor 4. Shut-down Sequence 5. Standby Mode Combustion Fan Modulating Gas Valve/POV Bypass Out going Temperature Thermistor Water Flow Sensor Water flow control valve SV0 or SV Main
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Types of Applications
RESIDENTIAL
APARTMENTS/CONDOS
HOUSING AUTHORITES
FOODSERVICE
HOSPITALITY
HEALTHCARE
SCHOOLS
GOVERNMENT / MILITARY
CAR WASH
LAUNDROMATS
HAIR SALONS
FITNESS CENTERS
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THE BASICS Four important factors when sizing tankless units:
Incoming ground water temperature
Hot water demand
Altitude
Gas line size
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Understanding Maximum Flow Rate EXAMPLE (from previous page) Incoming water = 57 ° Rinnai Set-Point temperature = 120 °
Subtract the incoming ground water temperature from the water heater’s set temperature for ∆T 120° - 57° = 63
The maximum GPM flow rate for any given ∆T can be found at the intersecting points along each model’s specific flow curve
A GPM flow test from the temperature controller can verify each unit’s performance RC98i/e Flow Curve Flow curves of each model are listed in each installation manual If incoming water is 57 ° and requested temperature is 120 ° , ∆T is 63 ° and gpm flow rate is 6.0 gpm 63
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∆T Temperature Rise (°F)
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RC Series Maximum Flow Curves Models RC98 RC80
Max. Btu 199,000 157,000 T( °F) 140 135 130 125 120 115 110 105 100 95 90 85 80 75 70 65 60 55 50 45 40 ≤35 GPM 2.7
2.8
2.9
3.0
3.2
3.3
3.4
3.6
3.8
4.0
4.2
4.4
4.7
5.0
5.4
5.8
6.3
6.9
7.6
8.4
9.5
9.8
GPM 5.0
5.4
6.0
6.6
7.5
8.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
3.0
3.1
3.3
3.5
3.7
4.0
4.3
4.6
RC80i/e RC98i/e www.rinnai.us
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SIZING METHODS – Definitions
Four methods used to sized tankless units: FLOW RATE (GPM) GPH REQUIREMENTS (GPH) WATER SUPPLY FIXTURE UNITS (WSFU) TANK WATER HEATER REPLACEMENTS
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PIPING DESIGN LAYOUT
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Hydronic Furnace
Evaporator Coil
Matched Component System Easy, Flexible Installation Comfortable Hydronic Heat
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Heat Your Air as Efficiently as Your Water Domestic Hot Water Priority System
` ` Gas Supply Cold Water Supply ` www.rinnai.us
Domestic Hot Water • © 2011 Rinnai America Corporation • [email protected]
` Mixing Valve
Rinnai Concentric Venting
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Vent Termination Requirements 36” (.91 m) to ventilated or unventilated soffit or eve vent; or to a deck or porch* 12” (.30 m) to an inside corner* 12” (30 cm) between Rinnai terminals at the same level 60” (1.52m) between Rinnai terminals at different levels 2 inches between outdoor units at the same level 60” (1.52m) vertically between Rinnai terminals (Also applies to HPe models)
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12” (30 cm) between Rinnai terminals at the same level
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Why choose a Rinnai Tankless?
Rinnai offers the most comprehensive warranty:
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Application Example
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Sizing Report
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Sizing Report
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Application Example
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Application Example
EXISITING EQUIPMENT: 2 - PVI boilers (model: 800P 250A-PV) operating at 120 °-125° for their domestic hot water to the rooms 1 - Bradford White tank (model: EF100T150E3N2) zoned for the kitchen / laundry demand operating at 175 °-185°. www.rinnai.us
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Application Example
CAPITAL COST:
Replace existing PVI / Bradford White System: Replace with Rinnai System: Savings if using Rinnai System: $88,500 $45,356 $43,144
ESTIMATED CAPITAL & OPERATING SAVINGS WITH RINNAI: YEAR 1
Equipment saving: $43,144 Energy savings:
TOTAL SAVINGS
$10,446
$53,590
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CONTACT INFORMATION
CAN WE HELP PROVIDE YOU A RINNAI SOLUTION FOR YOUR NEXT PROJECT?
Rinnai will size your project and provide you a Commercial Sizing Report with Piping Diagram back to you within 48 hours and Free of charge. Please contact us at: .
Rinnai Corporation 1-800-621-9419 ext. 6 [email protected]
103 International Drive Peachtree City, GA 30269 www.rinnai.us
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