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

4“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

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

5“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 ®

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

10“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 ®

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

Flo-H2O™

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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)

32“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 Canada

• Market splits 85% or more for water• Steam in downtown Toronto – mainly old

installation (retrofit)

33“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 ®

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

34“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 ®

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 ®

www.armstronginternational.com ©2007 Armstrong International, Inc.