MAXFLOW/MAXTEMPISWHX SERIESINSTANTANEOUS DOMESTIC WATER HEATER

Feed-Forward temperature and pressure compensating system supplies unlimited hot water on demand, anywherethere is 2 to 15 PSIGof steam available.Immediate Hot Water.Feed-Forward system.Up to 9000 gals./hr. instantaneously in a single unit

. Temperature and pressure compensating design forcontinuous accurate water temperature.Accurate to +1-4°F

Complete Pre-Piped Packaged Systems.System supplied as a "true" pre-piped, pre-packagedsystem. Other than the five points of connection, noother valves or piping is required..Low-cost installation and maintenance

Safe and Reliable.A proven reliable design.No chance of scalding, potential failure results incold water output.Heat exchangers are 150#1300# ASME rated andstamped.Water packages are pressure tested to 1 1/2 timesmaximum working pressure

Space and Energy Efficient.Minimal floor space required. Operates on low pressuresteam (2-15PSIG). Demand only operation.Storage tank is eliminated

Eliminate Your Operational and Maintenance Nightmares.Expensive Tube Bundle Replacements .Potential Scalding H2OTemperatures.Large Leaking Storage Tanks .Large Temperature Swings and Delays.Failed Tank Linings .Wasted Space.Standing Warm Water (Potential Legionella) .Wasted Energy

With MAXFI.OW/MAXTEMPyou receive a proven concept backed by experience and state-of-the-art engineeringdesign. So go ahead, heat all the water your situation demands, consistently, reliably and all at a low installation cost.

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WHY OTHER SYSTEMS DON'T MEASURE UP:Pressure Differential Feed Forward Systems: wait a period of time for the tank to recover.

Feed forward style units, employing a differential F~rt:hermore, the m?inten~nc.e of a leaky tank is bot~pressure diaphragm control, share common difficult and e.x~en~lve.Thln~lng a~out r~placement.drawbacks. Their performance is based on constant For~et about It. It s next to Impossible withoutmake-up water temperature, and a constant steam having to remodel.pressure, to maintain the outlet hot water Wasted Energy:

temperature required. Throughou~ the year, your It's a shared downfall of all feedback systems.steam supply pressures may po~entlally va~ and your Let's face it the typical domestic hot water system is inmake-up water tem~erature will ch~nge with th~ . high demand only a small percent of the time.sea~ons. Cons~ant adjustments to .thls type of unit IS. Whereas, the majority of the time is spent cycling ontypICally required when these variables cha.nge. Also, If to heat water and off to cool it through radiation. Thist~e temp.erature cont~ol system were to fall (the constant on and off cycling can quickly wear out thedifferential pressure diaphragm 70ntro! valve), you steam control valve. Additionally, this can lead to ancoul~ experience days of down time, high cost for. outlet overflowing with scalding H2Obecause thisrepalr/replacement parts and hour~ of labor costs Just system can potentially fail open (hot). The end result:to restore the system to an operational status. needless wear and tear on the system, wasted energyTank-less Semi-Instantaneous Feed Back Systems: and a potential lawsuit.

This style of Feed Back System has little water Failed or Leaking Tube Bundles:

storag: and comes with a string of m~i~tenance and Another problem all feedback systems share is theoperational headaches: .A:lthough seml-lnstantaneous modulating steam control valve, which contributes tofeedba.ck systems are similar to ~ank systems, . drainage problems. Ifyour system is not trappedoperationally, and at the sa~e time save space, this properly or if the lifting of condensate is necessarytype of system proves t<;>be !naccurate because of t~e without a condensate pump, you are at risk forslow tempera~ure .reac~lon tl~e. The outcome of this potential water hammer or thermal shock. This resultdelayed reaction time ISvarying water temperatures can destroy the expensive heating element or tubeand thermal lag. bundle, therefore causing cross contamination

The main problem with this type of system is that between the water and the steam side and theit is unable to keep pace with the current temperature reduction or loss of heating capability altogether.

demand, because it reacts to what has already Legionella Bacteria'happened within the system. This result stems from its . .reliance upon the temperature-sensing device to feed All !eed back sys~ems can c~eate the environment forback instructions to the steam control valve. The valve leglonella bacteria to flourish. All feed back systemsthen opens and transfers the latent heat of the steam share the potential hazard of increasing thethrough the tube bundle and then to the water and possibi!ities of the legionella bacteria. The feed ba7kattempts to keep pace with demand, which has system s outpu~ water temp~rature has the potentialalready taken place within the system. In the end, it to ;ake the leglonella ba~terla from a d~rman~ state ofremains a step behind current temperature demands. 68 F and below to an active state of 69 F-120 F.

Additionally, the optimal growth environment isLarge Storage Tank Feed BackSystems: reached between 95°F- 115° F,which is where mostAlthough large storage tank systems have the ability domestic hot water systemsoperate. The 100 % rapid

to supply large volumes of water at fairly consistent kill temperature of the bacteria (158° F) is not onlytemperatures, these systems also have their drawbacks: reached, but is surpassed prior to mixing to the desiredhigh up front cost for equipment and installation, output water temperature by the MAXFLOW/MAXTEMPwasted energy, space consumption, potential leaking domestic water heater. This ability greatly reduces theor failure of tank lining and slow recovery. So potential of any legionella bacteria to form in thebasically, when you are out of hot water, you have to domestic hot water system.

Imagine: a systemfhaf;requil"e$ hQstearn side temperature controlvalve.lmqglne a sysfemuna:ffected byvarying inlet watertempetafures or .steampressures.lmagine a systemt.h.at can give you up to 9000 gallons ofwater per hourinstan~lywi~ha(:Ql'1sjsfent easily adjUstable water suPplYtemperature. Imagine the safest

system out there, th.afif itiwere ~~f~Uivv~uldf~jl<:~Tpletely cord Without any potentia Iof scalding someone.That's what you will get. with thetf4Pf-'QWlIRl'..,' InstantaneOus water heater. Now Stop Imagining andmake it a reality!Cont<;lctyouri_~()Q,t:llll'- representative now.

ISWHX DIMENSIONAL DRAWING

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Materials

Specifications

Accessories Indude:.Steam Trap and Strainer.Thermostatic Air Vent.Check Valves.Steam PressureGauge.Vacuum Breaker

.Water Circuit Balancing Valve.Hot Water Supply Temperature Gauge.Hot Water Return Temperature Gauge.Isolation Valve.ASMEWater Relief Valve.Solenoid Overtemp Safety System

Optional Additions:.Recirculation Pump.Auto Steam Isolation Package.Steam Pressure Reducing Valve.Steam Safety Relief Valve

.DoubleWallHeat Exchanger~. .'"

1.SystemMixingValve

2.OvertempSafetySolenoidValve

3.Recirc.DivertingValve

4.ASMEWaterPressureSRV

5.T-AirVent

6.PressureGauge

7.VacuumBreaker

8.SteamTrap

9.TemperatureSwitch

10.OutletWaterTemperatureGauge

Steam Condensate Recirc. Drain or Pkg. Pkg. Pkg.Connection Discharge Cold Water Hot Water Water Pipe Accessory Over All Over All Over All

Size To Size From Inlet Size Supply Size Size Connection Height Length WidthMODEL Heater Trap Point

A B C D E F G H I

ISWHX-06034 2" N.P.T. 3/4" N.P.T. 1 1/2" SWT. 1 1/2" SWT. 1" SWT. 1" N.P.T. 34" 42" 18"

ISWHX-06044 2 1/2" N.P.T. 1" N.P.T. 1 1/2" SWT. 1 1/2" SWT. 1" SWT. 1" N.P.T. 34" 56" 27"

ISWHX-08044 3" N.P.T. 1 1/2" N.P.T. 2" SWT. 2" SWT. 1" SWT. 1" N.P.T. 37" 58" 30"

ISWHX-10044 6" 150# FLG. 2" N.P.T. 2112"& 3" SWT. 21/2"&3" SWT. 1" SWT. 1" N.P.T. 40" 60" 30"

Valve Valve Water Piping, Heat Heat Heat Tube Package CondensateBody Inserts Fittings & Misc. a-Rings Exchanger Exchanger Exchanger Sheets Stand Piping

Valves Head Shell Tubes & FittinqsStainless Steel Copper Viton Bronze Carbon Steel 20 Gauge 316 Carbon Carbon

Bronze Brass & Bronze 150# ASME Copper Stainless Steel Steel &and Teflon Rated 3/4" a.D. Steel Iron

Application Steam Supply Pressure Water Supply Pressure Maximum Water Pressure DropSteam to Water 2-15 psig 30-125 psig 10 psig

ISWHX SIZING AND CAPACITY TABLES

**NOTE:Increased capacities available on application, consult your MAXFLOW/MAXTEMPRepresentative.

""RMOSTATIC AIR VENT

COLD WATER MAKE-UP IN~~z

OIFFEREN11AL PRESSURE AUTO.

L STEAMISOLATIONSYS1'fM

1CHECK I

VALfl-~~ i

IIIIIIIIIII

ASM' RATEO HEAT EXCHANGER

HOTWATER

DUTTO

SVST'EM

DENSANDManufacturedBy: ~:5~s~~~~~d,Unit #7, Englewood, Colorado 80110

Phone: 303-781-1515 Fax: 303-761-0055 Web: www.Densand.com

MODEL #ISWHX + 06034 06044 08044 10044DELTA'T' GPM #/HR GPM #/HR GPM #/HR GPM #/HR'"

ISWHX@ 5 PSIG40-110° 20 729 40 1458 92 3355 150 547040-120° 14 584 30 1250 90 3748 145 604040-130° 10 469 24 1125 72 3374 110 515440-140° 7 365 18 936 58 3019 90 468540-160° 3 188 10 625 36 2250 56 350040-180° * * 5 365 20 1460 32 2336

ISWHX @ 10 PSIG40-110° 23 846 46 1692 92 3383 150 551640-120° 17 714 36 1513 92 3865 150 630140-130° 13 615 28 1323 82 3873 130 614240-140° 9 473 22 1155 68 3570 105 551240-160° 5 316 14 883 44 2773 70 441140-180° 2 147 8 589 28 2061 45 3312

ISWHX @ 15 PSIG40-110° 26 963 51 1889 92 3407 150 555640-120° 20 847 40 1692 92 3893 150 634740-130° 15 714 32 1522 92 4375 145 690140-140° 11 582 26 1375 76 4019 120 634540-160° 6 381 16 1079 50 3173 80 507840-180° 3 223 10 742 35 2595 54 4004