packaged hot water generating systems - A.O. Smith Water Heaters

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PACKAGED HOT WATER GENERATING SYSTEMS A.O. Smith's hot water generators are available for operation with steam or boiler water as the energy source. They are completely assembled with components sized, piped and checked at the factory before shipment. Generators are available in space saving vertical or horizontal models.

STEAM / HOT WATER MODELS HWG

CUSTOM UNIT AVAILABILITY - Custom units built to order, with tank capacities up to 12,000 gallons, with special control trim, and with special heating units can be built to design specifications on special order basis. Standard units listed in this brochure cover most standard orders. INSULATION AND JACKETING - The HWG system will be insulated with fiberglass to an R value greater than 12.5 and enclosed in a baked enamel cabinet. The HWG systems meet or exceed the requirements of ASHRAE/IES 90.1b1999. CODE LISTING - The standard system will employ an ASME "HLW" code glass-lined storage tank fitted with an ASME "U" code 3/4" diameter copper tube heat exchanger. INTEGRAL PUMP - The standard HWG system will employ an integral bronze circulator pump. The standard heat exchanger sizing tables are also based on using integral circulators. HWG OPTIONS (STEAM OR WATER BOILER UNITS) Low water cutoff, alarm horn, 11x15 vessel manway, 4x6 vessel hand hole. STEAM UNITS - Standard steam trim consists of temperature control valve, inlet and auxiliary steam traps, inlet and auxiliary strainers, steam pressure gauge with siphon, vacuum breaker and air vent. OPTIONAL STEAM TRIM - Includes steam pressure reducing valve, electric high limit safety system, pilot operated controls, pneumatic controls. BOILER UNITS - Standard boiler water trim includes temperature control valve and boiler water temperature gauge. OPTIONAL BOILER TRIM - Electric high limit safety system, three-way controls, three-way controls with bypass and boiler water pump. ASME RATING - Standard HWG consists of ASME HLW Code storage tank rated 125 psig working pressure with U Code heat exchanger, temperature & pressure relief valve, temperature & pressure gauge in tank, drain valve and lifting lugs. CATHODIC PROTECTION - Standard HWG systems employing glass, cement or epoxy lined tanks are fitted with magnesium anodes as cathodic protection. Revised January 2003

L W

U

LIMITED WARRANTY OUTLINES GLASS-LINED, CEMENT, EPOXY: If the tank should leak any time during the first five years, under the terms of the warranty A.O. Smith will repair or replace the tank; installation, labor, handling and local delivery extra. THE COIL HAS A ONE YEAR LIMITED WARRANTY. NOTE: THIS OUTLINE IS NOT A WARRANTY. For complete information, consult the written warranty or A.O. Smith Water Products Company.

A 417.0

TO SPECIFY HWG SERIES PACKAGE WATER HEATER: 1. Calculate storage capacity in gallons required, and determine if vertical or horizontal installation applies. 2. Decide what type of heating medium will be used; steam or boiler water. • If STEAM - Determine pressure in coil. • If BOILER WATER - Determine available boiler water temperature. 3. From the recovery table, obtain the required GPH capacity and temperature rise. Selecting heating coil size. 4. Decide whether single or double wall coil is required. EXAMPLE INSTALLATION REQUIREMENTS: Vertical, 140 gallons, Steam @ 5 PSIG, 80 GPH Recovery, 40 - 140°F temperature rise. TO DETERMINE THE HWG SERIES MODEL: Storage Tank ................................. 140 Gallons, Vertical Coil Size ........................................ 4-18 (from RECOVERY CHART) MODEL TO SPECIFY: HWG - 140 V ES S

4-18 ESS = Single Wall Steam EDS = Double Wall Steam ESW = Single Wall Water EDW = Double Wall Water

Heating Coil Size S = Steam, W = Water S = Single Wall, D = Double Wall V = Vertical, H = Horizontal Gallons

Table HWG-1

GALS./HR RECOVERY (BASED ON CIRCULATING TANK) COIL SIZES (DIA.-LENGTH)

STEAM PRESS IN COIL (PSIG)

40 - 140°F

50 - 140°F

60 - 140°F

4-18 72 83 90 96 104 78 89 97 105 110 87 99 107 115 122

0 5 10 15 20 0 5 10 15 20 0 5 10 15 20

Table HWG-2

4-36 164 190 205 218 236 179 203 222 239 251 198 225 243 262 278

6-24 320 370 400 425 460 349 395 433 466 490 386 438 474 511 543

6-36 508 588 635 674 730 554 627 687 739 777 613 696 753 812 862

6-54 788 912 985 1046 1133 859 973 1066 1147 1206 952 1080 1168 1259 1338

8-42 1080 1250 1350 1434 1553 1177 1334 1461 1571 1652 1304 1480 1601 1725 1833

8-60 1640 1898 2050 2177 2358 1178 2025 2218 2386 2509 1980 2247 2431 2620 2784

10-42 1980 2292 2475 2628 2846 2158 2445 2678 2881 3029 2391 2713 2935 3163 3361

10-48 2240 2593 2800 2974 3220 2442 2766 3030 3259 3427 2705 3069 3321 3578 3802

12-36 2440 2824 3050 3239 3508 2660 3013 3300 3550 3733 2946 3343 3617 3898 4142

12-48 3320 3843 4150 4407 4773 3619 4100 4490 4831 5080 4009 4548 4922 5304 5636

14-42 4080 4723 5100 5416 5865 4447 5039 5518 5936 6242 4927 5590 6049 6518 6926

G.P.H. RECOVERY WATER-WATER (CIRCULATING TANK) W/TEMPERATURE RISE (40°-140°F) COIL SIZES (DIA.-LENGTH) 4-18

4-36

6-24

6-36

6-54

8-42

8-60

10-42

10-48

12-36

12-48

14-42

180°F BOILER WATER

45

87

149

223

335

502

707

949

1079

1135

1544

1823

MINIMUM GPM REQ'D

4

7

13

19

28

42

59

79

90

95

129

152

212°F BOILER WATER

69

135

230

346

518

778

1094

1469

1670

1757

2390

2822

MINIMUM GPM REQ'D

6

12

20

29

43

65

91

122

140

146

200

235

NOTES: 1. Other coil sizes available. 2. Consullt factory for design parameters outside this chart.

HWG - 140V MODEL

GALS.

A

B

C

D

E

HWG-140V

140

89

30

22

11 1/4

2 1/2

HWG-200V

200

85

36

24

15 1/2

2 1/2

3" THICK FIBERGLASS INSULATION

HWG-350V

350

102

42

25 1/2

19

2 1/2

TEMPERATURE GAUGE

HWG-400V

400

107

42

25 1/2

19

2 1/2

HWG-500V

500

86

54

30

25 1/2

3

HWG-750V

750

118

54

30

25 1/2

3

HWG-1000V

1000

150

54

30

25 1/2

3

MODEL

GALS.

A

B

C

D

E

HWG-200H

200

77

41

16

26

2 1/2

HWG-350H

350

93

47

16

30

2 1/2

HWG-400H

400

99

47

17

30

2 1/2

HWG-500H

500

79

59

23

42

3

HWG-750H

750

111

59

23

42

3

HWG-1000V

1000

143

59

23

42

3

B

PRESSURE GAUGE

A

E COLD WATER INLET

E COLD WATER INLET

RECIRCULATION PUMP C DRAIN

D

FRONT VIEW

SIDE VIEW

HWG STANDARD STEAM TRIM PRESSURE REPLACEMENT VALVE (OPTIONAL)

HWG - 200V RELIEF VALVE

B

CONTROL VALVE 3" THICK FIBERGLASS INSULATION

PRESSURE GUAGE

GATE VALVE INLET STRAINER

PIGTAIL TEMPERATURE GUAGE

AIR VENT MOUNTS UPRIGHT

BALL VALVE

PRESSURE GUAGE

VACUUM BREAKER MOUNT PROBE IN VESSEL

BRUSHING IS REQUIRED (2 PLACES)

OPTIONAL MANWAY OR HANDHOLE

OUTLET STRAINER

A

RECIRCULATION PUMP

DRIP TRAP STEAM TRAP

DRAIN

TO RECIRCULATING PUMP

D

FRONT VIEW

E

SIDE VIEW

TEMPERATURE GUAGE STEAM PRESSURE GAUGE

A TEMPERATURE & PRESSURE RELIEF VALVE

VACUUM BREAKER AIR VENT MAIN "Y" STRAINER

LIFT LUGS (2) PLACES

HOT WATER OUTLET

3" FIBERGLASS INSULATION (R> 12.5)

B

MAIN F&T TRAP D

HOT WATER OUTLET

DRAIN

DRIP TRAP C

DRAIN TEMPERATURE REGULATOR STEAM INLET "Y" STRAINER

END VIEW

FULL LENGTH CHANNEL BASE

SIDE VIEW

SPECIFICATIONS - BOILER WATER TO WATER The hot water heater generator package shall be A.O. Smith model no. HWG____________ (V) or (H), (ESW) or (EDW) with____________ heating coil. The jacketed, insulated storage tank shall be constructed and stamped according to ASME specifications for (125) psi working pressure. The unit shall be designed to recover____________ GPH for a temperature of________ degrees F to________ degrees F when supplied with____________ GPM boiler water entering temperature regulator at ________ degrees F. The heating coil shall be constructed and stamped according to sectionVIII of ASME code. The tube bundles shall be constructed of 3/4" O.D. 20 GA. deoxidized drawn copper tubing. The unit shall be controlled by one of three means: On-Off Modulating Valve____________, Three Way Modulating Valve____________, Thermostatically Operated Boiler Water Pump____________. The unit will be completely factory assembled and furnished with the following standard components. A storage tank ______" dia. x ______" long with ______ gallon capacity. Tank shall be insulated with 3" fiberglass insulation, with a R-value > 12.5. Tank shall be jacketed with heavy gauge steel with a baked enamel finish. Tank shall be built to ASME section IV, glass lined and furnished with an ASME temperature & pressure relief valve. Heating coil built to Section VIII of ASME code. A temperature regulator to be self actuated, direct acting. A bronze integral circulator pump with copper soldered recirculation line and (2) bronze ball valves. A drain valve and assembly. Jacket mounted temperature and pressure gauges, An ASME temperature & pressure gauge and a full length channel base and lifting lugs. OPTIONAL EQUIPMENT IS AS FOLLOWS: STORAGE TANK Tank shall have 150 psi or 160 psi operating pressure, an ASME section VIII construction, a 4"x6" handhole, 11"x15" manhole, a cement or epoxy lining. WATER TO WATER SECTION Section shall have a self actuated or pneumatic operated temperature regulator and a bypass loop in boiler water line for temperature regulator isolation.

SPECIFICATIONS - STEAM TO WATER The hot water heater generator package shall be A.O. Smith model no. HWG _____________ (V) or (H), (ESW) or (EDW) with ____________ heating coil. The jacketed, insulated storage tank shall be constructed and stamped according to ASME specifications for (125) psi working pressure. The unit shall be designed to recover ____________ GPH for a temperature rise of ________ degrees F to ________ degrees F when supplied with ________ psi steam to the temperature regulator. The heating coil shall be constructed and stamped according to sectionVIII of ASME code. The tube bundles shall be constructed of 3/4" O.D. 20 GA. deoxidized drawn copper tubing. The unit will be completely factory assembled and furnished with the following standard components. A storage tank ______" dia. x ______"long with ______ gallon capacity. Tank shall be insulated with 3" fiberglass insulation, with an R-value > 12.5. Tank shall be jacketed with heavy gauge steel with a baked enamel finish. Tank shall be built to ASME section IV, glass lined and furnished with an ASME temperature & pressure relief valve. Heating coil built to Section VIII of ASME code. A temperature regulator to be self actuated, direct acting. Main F&T trap, main "Y" strainer and associated black steel pipe. A bronze integral circulator pump with copper soldered recirculation line and (2) bronze ball valves. A drain valve and assembly. Jacket mounted temperature and pressure gauge. An ASME temperature & pressure guage and a full length channel base and lifting lugs. Air vent and vacuum breaker. OPTIONAL EQUIPMENT IS AS FOLLOWS: STORAGE TANK Tank shall have 150 psi or 160 psi operating pressure, an ASME section VIII construction, a 4"x6" handhole, 11"x15" manhole, a cement or epoxy lining. STEAM TO WATER SECTION Section shall have a pilot (spring, air, temperature) operated temperature regulator .

A.O. Smith Water Products Company Ashland City, TN A Division of A.O. Smith Corporation

A.O. Smith Water Products Co., Inc. On Line www.hotwater.com For Technical Information and Automated Fax Service, Phone: 800-527-1953

A 418.0

A.O. Smith Corporation reserves the right to make product changes or improvements at any time without notice. © A. O. Smith Corp.. 2003

Printed in the U.S.A.

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packaged hot water generating systems - A.O. Smith Water Heaters

PACKAGED HOT WATER GENERATING SYSTEMS A.O. Smith's hot water generators are available for operation with steam or boiler water as the energy source. T...

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