www.armstronginternational.com ©2007 Armstrong International, Inc.
Instantaneous Water HeaterFlo-H20™ Water to Water
Instantaneous Water HeaterFlo-H20™ Water to Water
Armstrong Hot Water Group
2“Expect many enjoyable experiences!”
David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
Agenda
• Today’s historic approaches to domestic hot water systems:
– Issues and concerns
• The Flo-H20 concept and solution
• Sizing, selection, and target applications for Flo-H20
• Market Share
3“Expect many enjoyable experiences!”
David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
Domestic Water Heating
Traditional Approach (older)
• Heating boiler through tank heater to larger storage tank
• Users draw directly from large tank
• Typical users: Motels, Dorms, Prisons, Army Barracks
Motels
Dorms
Prisons Army Barracks
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David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
Domestic Water Heating
Newer Approach
• Dedicated boiler to heat domestic water for storage in smaller tanks
• Users draw from smaller tanks
• Typical installations: Condos, Schools, Apartment Buildings, Nursing Homes
Condos
Schools
Apt. Building Nursing
Homes
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David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
Disadvantages
• Floor Space– Residential building 140
units– Dedicated boiler & tanks –
80 sq.ft.
• Radiation Losses– 30% of the total hot water
capacity
• Recover Rate– Slow – Hot water storage
• Legionella Bacteria– At 115°F and lower
• Maintenance– Periodic maintenance
needed (cement, glass and/or epoxy lined tanks)
• Leaks
Traditional Approach Schematic
Option A DHW storage tank and dedicated boiler Option B Option C Hot water heater (combination unitscircuit (separate from the building Use storage tank immersion heaters with built-in storage tanks andheating boiler circuit) to deliver heat from the space heating / building boilers (capacities up to
boiler circuit 600 gallons)
Boiler potable water heating Boiler potable water heatingcircuit circuit
DHW boiler
DHW storage tank
2100 gal
DHW storage tank
2100 gal
city water supply
recirculation line
Domestic HotWater (DHW)boiler and tankcircuit
"Building Heat"boiler circuit
Bldg Heat boiler
Bldg Heat boiler
Bldg Heat
boiler
Bldg Heat
boiler
Boilerinlet header
Boileroutletheader
city water supply
Domestic HotWater (DHW)from hot waterheater tanks,gas or elec
recirculation line
Bldg Heat
boiler
Bldg Heat
boiler
Bldg Heat boiler
Bldg Heat
boiler
Boilerinlet header
Boileroutletheader
hot water supply hot water supply
DHW storage tank
2100 gal
DHW storage tank
2100 gal
city water supply
recirculation line
Domestic HotWater (DHW)immersion heatersand tank circuit
"Building Heat"boiler circuit
Bldg Heat
boiler
Bldg Heat
boiler
Bldg Heat boiler
Bldg Heat
boiler
Boilerinlet header
Boileroutletheader
hot water supply
space heating boiler supply andreturn lines for DHWimmersionheaters
Market Trends
• Mechanical rooms are getting smaller– Floor space is at a premium
• Trends towards systems increasing
8“Expect many enjoyable experiences!”
David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
Solution
Armstrong Flo-H20™
Instantaneous Water Heater
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David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
Flo-H20™
• Why a Flo-H20?
• What is a Flo-H20?
• Components
• How does it work and operating parameters
• Features
• Sizing & Pictures
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David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
Why a Flo-H20™
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David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
What is a Flo-H20™
Is a water to water, plate & frame heat exchanger that uses high temp. boiler water
to heat potable water for Domestic Use
12“Expect many enjoyable experiences!”
David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
Main Components of Flo-H20™
• Plate & Frame Heat Exchanger
• Primary Pump (VIL)
• Electronic 3-way valve/actuator
• Electronic Controls
• Secondary circulator for re-circulation loop
• Temp. Switch on domestic outlet
• Temp. Sensors:
• Boiler Supply • City Water Supply
• Boiler Return • DHW Recirc. From loop
• DHW supply to loop • Mixed City Supply & Recirc.
13“Expect many enjoyable experiences!”
David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
Flo-H20™
• Heat Exchanger
• Three-Way Mixing Valve
• Temperature Sensors
• Programmable Logic Controller (PLC)
BOILER SUPPLY
BOILER RETURN
D.H.W. SUPPLYVIL PUMPPFX
3-WAY VALVECIRCULATOR
CONTROLS
Take heat energy fromthe boiler circuit throughthe heat exchanger andapply it to the colddomestic water
RE-CIRC RETURN
CITY WATER IN
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David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
Operation & Parameters
• Make all piping connections• Temp. Controller in Panel operates on DHW supply temp. &
DHW usage using Feed-back & Feed-forward principles• Controls are based on PID theory• DHW shall be maintained ± 4º F ranging from 110º - 140ºF• Low Demands (night time) DHW set point automatically
resets to lower temp to reduce heat loss and conserve energy
• Temp. Switch on DHW side set at 20ºF above set point– When activated, cuts off source of heat by closing boiler port of 3-
way control valve
• 3-way control valve operates like a diverting valve for boiler side
16“Expect many enjoyable experiences!”
David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
Operating Parameters
• Operating Temperatures:– Primary (Boiler Side): 180º-200ºF Supply & 160ºF Return (140ºF Min.)
– Secondary (Domestic Side): 40º-60ºF City Water & 110º-140ºF Supply
• Operating Pressures:– Both sides: 125 psig Maximum
• Water Flows: GPMModel Boiler Side
(180-200°F)DHW Side
(140°F)Recirc.
(110-140°F)
40 100 40 6
70 175 70 11
100 250 100 15
17“Expect many enjoyable experiences!”
David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
Features & Benefits of Flo-H2O™
• Complete Package, Yet Compact
– Apartment building with 140 units
• Dedicated Boiler & 3 Tanks (200 gal ea.)
→ Surface area = 80 sq. ft.
• Flo – H2O Water Heater
→ Surface area = 9 sq. ft.
18“Expect many enjoyable experiences!”
David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
Features & Benefits of Flo-H2O™
• Easy to Install
– In & Out Piping & Electrical
• Fail Safe
– When DHW at temperatures out of range
• Single Source of Supply, Responsibility, & Support
19“Expect many enjoyable experiences!”
David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
Features & Benefits of Flo-H2O™
• Efficient Use of Energy
– Heats water on demand
– No heat loss (no tanks)
– Ideal for rapidly changing demands
• Complete System
– With all necessary valves
20“Expect many enjoyable experiences!”
David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
Features & Benefits of Flo-H20™
• Quick Recovery Rate (Instantaneous)– Never Runs out of HOT WATER
• Reduces the risk of Legionella disease by avoiding the need to store hot water
Health – eliminates risk of contamination
Flo-H20™ When is Ideal?
Flo-H20 suited to many objectives
Flexibility, savings on operating costs
Maintainability, replacement,
servicing
22“Expect many enjoyable experiences!”
David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
Control Panel Features
• UL Approved• ± 4ºF control• Night time Setback
– Studies show loop losses of 10 – 45% of total water heater energy use
• Building Automation System – BAS Interface Capabilities
23“Expect many enjoyable experiences!”
David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
Control Panel Features
• Electronic temperature display– 6 temperatures– Visual indicator
• Easy to Install– Requires one power input
Product Offering
3 Package Sizes Available
Model 40 Model 70 Model 100
Heat exchanger construction• Single Plate• Double – Wall Plates
Flo-H20™ Sizing
Step 3: Use Armstrong’s Selection Table to get the required Flo-H2O Model
Step 3: Use Armstrong’s Selection Table to get the required Flo-H2O Model
Step 2: Obtain the required hot water flow rate in GPM from the chart (@140ºF)
Step 2: Obtain the required hot water flow rate in GPM from the chart (@140ºF)
Step 1: Estimate the number of fixture units for the application
Step 1: Estimate the number of fixture units for the application
Flo-H20™ Sizing
Sizing is based on ASHRAE’S Modified Hunter Curve for calculation of hot water flow rate
Preliminary Hot Water Demand Estimate (Instantaneous)
Type of Building Unit Fixture Units per unit
Hospital or Nursing Home Bed 2.5
Hotel or Motel Room 2.5
Office Building Person 0.15
Elementary School Student 0.3*
Jr. and Sr. High School Student 0.3*
Apartment House Apartment 3
Flo-H20™ Sizing
Fixture Units
Curve A - Restaurants
Curve B - Hospitals, Nursing Homes,
Nurses' Residences, Dormitories,
Hotels and Motels
Curve C - Apt. Houses
100
90
80
60
40
30
20
25 50 75 100 125 150 175 200 225 250 275 300 325 350 375 400
10
0 0
50
70
Conversion Factor:
L/s = gpm x 0.0631
Curve D - Office Bldgs.,
Elementary and High Schools
28“Expect many enjoyable experiences!”
David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
Flo-H20™ Sizing Procedure
Preliminary Hot Water Demand Estimate:
Example 1: 200 unit apartment building
Step 1: Table 14 of ASHRAE Applications Handbook estimates 3 fixture units (FU) per apartment at 140°F
Step 2: Calculate total amount of FU for entire building
Total FU = 3 x 200 = 600
Step 3: From Figure 22 of ASHRAE Applications Handbook, get the required hot water flow in USGPM at 140°F
Step 4: Find out boiler supply temperature available to the Flo-H2O (200°F)
Inlet Temp (F) Outlet Temp (F) 200 F 190 F 180 F
110 100 88 75120 88 77 66130 78 68 58140 70 61 53110 117 102 88120 100 88 75130 88 77 66140 78 68 58110 140 123 105120 117 102 88130 100 88 75140 88 77 66
** Boiler flow required = 175 usgpm Domestic water flow (usgpm) based on boiler water temperature
40
50
60
BOILER ** WATER TEMPERATUREDOMESTIC HOT WATER
MODEL 070
Flo-H20™ Sizing Procedure
Step 5: Find out cold water (city) supply temperature to the Flo-H2O (50°F)
Step 6: Go to Armstrong Flo-H2O selection tables and select Model 070 which is capable of delivering 78 USGPM maximum.
Second locate cold water supply temperature (Inlet) First locate boiler supply temperature
• Domestic water heating only
• Replaces the traditional storage tank with Tank Heater
Market Share & CompetitionMarket Share & Competition
31“Expect many enjoyable experiences!”
David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
Heat Source – Market Split USA
• Steam or Boiler water• Market splits 60% for water and up• Above split from reps survey (12 answers out of 43
forms)
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David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
Heat Source – Market Split Canada
• Market splits 85% or more for water• Steam in downtown Toronto – mainly old
installation (retrofit)
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David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
Typical Installation: (Steam)
• Generally low pressure (<15 psig)• Most designs are semi-instantaneous
– Small tank for low demand– Loop with circs (temp control)
• Shell & Tube– Mainly single wall– Some double wall
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David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
Typical Installation: (Boiler Water)
• Traditional storage tank with heater
• New trend is dedicated boiler with 90/10 Cu-Ni tubing. H.Ex. Inside or outside boiler to heat domestic water
• Code applied at the discretion of engineer/contractor/inspector
35“Expect many enjoyable experiences!”
David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
Armstrong Promise
We provide intelligent system solutions that improve utility performance, lower energy consumption, and
reduce environmental emissions . . . while providing an “enjoyable experience”!
35“Expect many enjoyable experiences!”
David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®
36“Expect many enjoyable experiences!”
David M. Armstrong
Intelligent System Solutions S T E A M • A I R • H O T W A T E R ®