Hot Water
Generator Systems
Water to Water
Horizontal or Vertical
Jacketed & Insulated
Lochinvar’s Hot Water Generator Systems are ideal when
boiler capacity is sufficiently sized to cover potable hot
water demand and provide source water for hydronic
heating systems. Hot Water Generator Systems use steam
or boiler water as an energy source and can provide high
recovery rates, making them an economical water heating
system.
Availability
Hot Water Generator Systems are pre-engineered and
pre-assembled complete with all piping to meet your
specific application. And like every Lochinvar product, we
thoroughly test them to ensure proper performance from
the moment they’re installed.
Hot Water Generator Systems are available in horizontal or
vertical configurations in a wide array of gallon capacities.
Standard packages are available in tank sizes from 2001000 gallons with single wall copper tube bundle heating
units. Custom configurations, smaller and larger tank
and tube bundles, and optional control packages are also
available. Consult the factory for specifications.
Steam to Water
Tank Construction – Lochinvar tanks are available with
Glass or Cement lining.
ASME - All Lochinvar tanks are constructed in
accordance with ASME standards and certified for 125 psi
working pressure (standard) or 150 psi working pressure
(optional).
Cathodic Protection – All glass lined tanks are equipped
with magnesium anodes to provide protection against
corrosion.
Manway – A manway is provided as an option on
glass-lined tanks and is standard on cement lined tanks.
*Horizontal tanks with tube bundles 48” and longer require manway.
Tank Circulator Pump – All standard Hot Water
Generator systems are equipped with a circulator pump to
maximize the amount of hot water provided.
Five-Year Limited Tank Warranty – Provides warranty
protection against tank failure. (See warranty for details)
One-Year Limited Warranty – Tube Bundle, parts,
accessories and controls (See warranty for details)
Unit shown with optional control package.
Optional Control Packages
Steam to Water – Control packages include an isolation
valve, 2-way self-operated temperature regulator, inlet and
outlet wye strainers, a float and thermostatic steam trap
and all necessary piping.
Water to Water – Control packages include isolation
valves, 2-way self-operated temperature regulator, inlet
wye strainer and all necessary piping.
Optional Equipment
•
Manual Reset High Limit w/ Solenoid Valve
• Manway (See notes on manway)
• 150 psi Tank Working Pressure
• Temperature & Pressure Gauge
• Vacuum Breaker
Dimensions
Vertical Tanks Round Jacketed
Model Gallon Maximum Shipping
Number Capacity A C D E Coil Length Weight
GV*0200JR 200 77-1/4” 32” 11-1/4” 17-1/4” 30” 600
GV*0257JR 257 92” 34” 18” 26” 36” 902
GV*0318JR 318 82” 40” 19-1/2” 27-1/2” 42” 993
GV*0432JR 432 82” 46” 21” 29” 48” 1,269
GV*0504JR 504 92” 46” 21” 29” 48” 1,373
GV*0650JR 650 93” 54-1/2” 23-1/2” 31-1/2” 54” 1,966
GV*0752JR 752 105” 54-1/2” 23-1/2” 31-1/2” 54” 2,030
GV*0940JR 940 129” 54-1/2” 23-1/2” 31-1/2” 54” 2,376
* Indicates Tank Lining – G=Glass C=Cement .
Horizontal Tanks Round Jacketed
Model Gallon Maximum Minimum Shipping
Number Capacity A B C Coil Length Coil Length Weight
GH*250JR 250 41” 88” 34” 90” 54” 1,600
GH*300JR 300 47” 76” 40” 78” 48” 1,800
GH*400JR 400 53” 76” 46” 78” 48” 2,250
GH*500JR 500 53” 88” 46” 90” 54” 2,500
GH*600JR 600 59” 88” 52” 90” 54” 3,600
GH*700JR 700 59” 100” 52” 102” 66” 4,200
GH*1000JR 1,000 59” 124” 52” 126” 78” 5,000
NOTE: Manway required on tanks with tube bundles 48” and longer.
* Indicates Tank Lining – G=Glass C=Cement
Non-Jacketed Tanks
Maximum Minimum Maximum
Gallon Length** Diameter Coil Length Coil Length Coil Length Shipping
Model Capacity (Height) (Width) D E (Horizontal) (Horizontal) (Vertical) Weight
GV*147 147 48” 30” 15 3/4” 23 3/4” 36” 30” 36” 400
GV*184 184 60” 30” 15 3/4” 23 3/4” 48” 42” 36” 468
GV*220 220 72” 30” 15 3/4” 23 3/4” 60” 48” 36” 548
GV*257 257 84” 30” 15 3/4” 23 3/4” 72” 54” 36” 628
GV*294 294 96” 30” 15 3/4” 23 3/4” 84” 66” 36” 701
GV*367 367 120” 30” 15 3/4” 23 3/4” 108” 78” 36” 868
GV*265 265 60” 36” 17 1/2” 25 1/2” 48” 42” 42” 577
GV*318 318 72” 36” 17 1/2” 25 1/2” 60” 48” 42” 673
GV*370 370 84” 36” 17 1/2” 25 1/2” 72” 54” 42” 770
GV*423 423 96” 36” 17 1/2” 25 1/2” 84” 66” 42” 866
GV*528 528 120” 36” 17 1/2” 25 1/2” 108” 78” 42” 1,058
GV*432 432 72” 42” 18 3/4” 26 3/4” 60” 48” 48” 909
GV*504 504 84” 42” 18 3/4” 26 3/4” 72” 54” 48” 1,050
GV*576 576 96” 42” 18 3/4” 26 3/4” 84” 66” 48” 1,190
GV*720 720 120” 42” 18 3/4” 26 3/4” 108” 78” 48” 1,470
GV*864 864 144” 42” 18 3/4” 26 3/4” 120” 96” 48” 1,751
GV*658 658 84” 48” 20 3/4” 28 3/4” 72” 54” 54” 1,346
GV*752 752 96” 48” 20 3/4” 28 3/4” 84” 66” 54” 1,507
GV*940 940 120” 48” 20 3/4” 28 3/4” 108” 78” 54” 1,828
GV*1128 1,128 144” 48” 20 3/4” 28 3/4” 120” 96” 54” 2,150
GV*951 951 96” 54” 22 3/4” 30 3/4” 84” 66” 60” 1,972
GV*1189 1,189 120” 54” 22 3/4” 30 3/4” 108” 78” 60” 2,423
GV*1427 1,427 144” 54” 22 3/4” 30 3/4” 120” 96” 60” 2,881
GV*1469 1,469 120” 60” 24 3/4” 32 3/4” 108” 78” 66” 3,221
GV*1763 1,763 144” 60” 24 3/4” 32 3/4” 120” 96” 66” 3,823
GV*2115 2,115 120” 72” 27 3/4” 35 3/4” 108” 78” 78” 3,904
GV*2538 2,538 144” 72” 27 3/4” 35 3/4” 120” 96” 78” 4,627
Note: Change “V” to “H” for Horizontal Configuration
* Indicates Tank Lining G= Glass C=Cement
**Add 4” to Length (Height) for Vertical Configuration
Dimensions
Vertical Tanks
Ordering Information
EXAMPLE: GVG0504JR
G V G 0504 JR
HORIZ./VERT.
HOT WATER
GENERATOR
Glass Lining, has a 504 gallon
capacity that is round jacketed.
TANK LINING
This Hot Water Generator is
a Vertical Tank with
JR = Jacketed Round
Leave blank for non-jacketed
models.
GALLON
CAPACITY
JACKETED
Horizontal Tanks
Steam to Water Optional Control Package
Water to Water Optional Control Package
Left hand or right hand configurations available.
Boiler Water Table - Recovery System
The listings are for boiler water temperatures and temperature rises that are most commonly used in the industry.
BW
GPM
40-160°F
BW GPH @
GPM
GPH @
40-140°F
BW
GPM
GPH @
40-120°F
BW
GPM
GPH @
40-160°F
BW
GPM
GPH @
40-140°F
BW
GPM
GPH @
40-120°F
BW
GPM
GPH @
40-160°F
BW
GPM
GPH @
40-140°F
180°F Boiler Water 200°F Boiler Water 210°F Boiler Water
BW
GPM
GPH @
40-120°F
Four Inch
Lochinvar
Diameters
Model Number
418 73 4 48 4 27 2 93 6 57 4 43 4 101 6 72 6 51 5
424 98 6 64 5 36 3 124 8 76 6 58 5 135 9 96 8 68 6
430 123 8 80 6 45 4 155 10 96 8 72 7 168 11 120 10 85 8
436 147 9 96 8 54 5 186 12 115 9 87 8 202 13 144 12 102 10
448 197 13 128 10 72 7 248 16 153 12 116 11 270 18 192 16 136 13
618 166 11 108 9 61 6 209 13 129 10 98 9 227 15 162 13 115 11
Six Inch
Diameters
624 212 14 138 11 78 7 267 17 165 13 125 12 291 19 207 17 147 14
630 261 17 170 14 96 9 329 21 204 17 154 15 358 23 255 21 181 18
636 304 20 198 16 112 11 384 25 237 19 180 18 417 27 297 24 211 21
648 403 26 262 21 149 14 508 33 314 26 238 23 552 36 393 32 280 28
660 498 33 324 27 184 18 628 41 388 32 294 29 683 45 486 40 346 34
824 429 28 279 23 159 15 541 36 334 27 253 25 588 39 418 34 298 29
830 543 36 353 29 201 20 684 45 423 35 321 32 744 49 529 44 377 37
Diameters
Eight Inch
836 657 43 427 35 243 24 828 55 512 42 388 38 900 60 640 53 456 45
842 770 51 500 41 285 28 970 64 600 50 455 45 1055 70 750 62 535 53
848 862 57 560 46 319 31 1086 72 672 56 509 50 1181 78 840 70 599 59
860 1008 67 655 54 373 37 1270 84 786 65 596 59 1382 92 982 81 700 70
Ten Inch
1030 1062 70 690 57 393 39 1338 89 828 69 627 62 1455 97 1035 86 738 73
1036 1262 84 820 68 467 46 1590 106 984 82 746 74 1730 115 1230 102 877 87
Diameters
1042 1487 99 966 80 550 55 1874 124 1159 96 879 87 2038 135 1449 120 1033 103
1048 1724 114 1120 93 638 63 2172 144 1344 112 1019 101 2363 157 1680 140 1198 119
1060 2152 143 1398 116 796 79 2712 180 1677 139 1272 127 2949 196 2097 174 1495 149
1072 2571 171 1670 139 951 95 3239 215 2004 167 1519 151 3523 234 2505 208 1786 178
1236 1749 116 1136 94 647 64 2203 146 1363 113 1033 103 2396 159 1704 142 1215 121
1242 2060 137 1338 111 762 76 2595 173 1605 133 1217 121 2823 188 2007 167 1431 143
Diameters
Twelve Inch
1248 2371 158 1540 128 877 87 2987 199 1848 154 1401 140 3249 216 2310 192 1647 164
1254 2682 178 1742 145 992 99 3379 225 2090 174 1585 158 3675 245 2613 217 1863 186
1260 2993 199 1944 162 1108 110 3771 251 2332 194 1769 176 4101 273 2916 243 2080 208
1272 3615 241 2348 195 1338 133 4555 303 2817 234 2136 213 4954 330 3522 293 2512 251
Fourteen Inch
1436 2363 157 1535 127 874 87 2977 198 1842 153 1396 139 3238 215 2302 191 1642 164
1442 2767 184 1797 149 1024 102 3486 232 2156 179 1635 163 3791 252 2695 224 1922 192
Diameters
1448 3172 211 2060 171 1174 117 3996 266 2472 206 1874 187 4346 289 3090 257 2204 220
1454 3588 239 2330 194 1328 132 4520 301 2796 233 2120 212 4916 327 3495 291 2493 249
1460 4011 267 2605 217 1484 148 5053 336 3126 260 2370 237 5496 366 3907 325 2787 278
1472 4804 320 3120 260 1778 177 6052 403 3744 312 2839 283 6583 438 4680 390 3338 333
NOTE: Boiler water (BW) requirements are based on a 20°F temperature drop.
Steam Table - Recovery Systems
The listings are for steam pressures and temperature rises that are most commonly used in the industry.
PPH
Steam
GPH @
40-160°F
PPH
Steam
GPH @
40-140°F
PPH
Steam
GPH @
40-120°F
PPH
Steam
GPH @
40-160°F
PPH
Steam
GPH @
40-140°F
10902 9453 10164
PPH
Steam
GPH @
40-120°F
PPH
Steam
GPH @
40-160°F
PPH
Steam
GPH @
40-140°F
PPH
Steam
GPH @
40-120°F
PPH
Steam
GPH @
40-160°F
Steam
Total PPH
5 psi Steam 15 psi Steam 25 psi Steam 50 psi Steam
GPH @
40-140°F
PPH
Steam
GPH @
40-120°F
Model
Number
Lochinvar
418 152 105 119 102 91 95 171 119 139 121 109 114 188 132 156 137 121 128 213 153 187 167 145 156
424 202 140 158 137 122 126 229 159 186 162 145 152 250 176 208 183 162 171 284 204 249 223 193 208
Four Inch
Diameters
430 253 175 198 171 152 158 286 199 232 203 182 191 313 220 260 228 203 214 356 255 312 279 242 260
436 304 210 238 205 183 190 343 239 279 243 218 229 376 265 312 274 243 257 427 306 374 335 290 312
448 405 280 317 274 244 253 458 319 372 325 291 305 501 353 416 366 325 343 569 408 499 447 387 416
618 342 236 267 231 206 213 386 269 314 274 246 257 423 298 351 309 274 289 480 344 421 377 327 351
Six Inch
Diameters
624 437 302 342 295 263 273 494 344 401 350 314 329 540 381 448 394 350 370 614 440 538 482 418 449
630 538 372 421 364 324 336 608 424 494 431 387 405 666 666 552 486 431 456 756 542 663 594 515 553
636 627 433 491 424 378 391 708 494 576 502 451 472 776 546 643 566 502 531 881 631 772 691 599 645
648 830 573 649 561 500 518 937 655 762 665 597 625 1027 723 851 749 665 703 1165 835 1021 915 793 853
660 1027 709 803 693 618 641 1159 809 942 822 738 773 1270 894 1053 927 822 869 1441 1033 1263 1132 981 1055
Eight Inch
824 884 611 691 597 532 552 998 697 811 708 636 666 1093 770 906 798 708 748 1241 889 1088 974 845 908
830 1119 773 875 756 674 698 1263 882 1027 896 804 842 1383 974 1147 1010 896 947 1570 1125 1376 1233 1069 1150
Diameters
836 1353 935 1058 914 815 845 1528 1067 1242 1084 973 1019 1673 1179 1387 1221 1084 1146 1900 1362 1665 1492 1293 1391
842 1585 1095 1240 1070 955 989 1790 1249 1455 1269 1140 1193 1960 1380 1625 1430 1270 1341 2225 1594 1950 1747 1515 1628
848 1775 1226 1388 1199 1069 1108 2004 1399 1629 1422 1276 1337 2195 1546 1820 1602 1422 1502 2492 1786 2184 1956 1696 1824
860 2076 1434 1624 1402 1251 1296 2344 1637 1906 1663 1493 1563 2567 1808 2128 1874 1663 1757 2914 2089 2554 2288 1984 2133
Ten Inch
1030 2187 1511 1711 1477 1317 1365 2470 1724 2007 1752 1573 1647 2704 1905 2242 1974 1752 1851 3070 2200 2691 2411 2090 2247
1036 2599 1795 2033 1756 1566 1623 2935 2049 2386 2082 1869 1957 3214 2264 2665 2346 2082 2200 3649 2615 3198 2865 2484 2671
Diameters
1042 3062 2115 2395 2069 1845 1912 3458 2414 2811 2453 2202 2306 3786 2667 3139 2764 2453 2592 4298 3081 3767 3375 2926 3147
1048 3550 2453 2777 2398 2139 2217 4009 2799 3259 2844 2553 2674 4390 3092 3640 3205 2844 3005 4984 3572 4368 3913 3393 3648
1060 4431 3061 3467 2994 2670 2767 5004 3494 4068 3550 3187 3338 5480 3860 4543 4000 3550 3752 6221 4459 5452 4885 4235 4554
1072 5293 3657 4141 3576 3189 3305 5978 4174 4859 4241 3807 3987 6546 4611 5427 4779 4241 4482 7431 5327 6513 5835 5060 5440
1236 3601 2488 2817 2433 2169 2248 4066 2839 3305 2884 2590 2712 4453 3136 3692 3250 2885 3048 5055 3623 4430 3969 3442 3700
1242 4241 2930 3318 2865 2555 2648 4790 3344 3893 3397 3050 3194 5244 3695 4348 3829 3398 3591 5954 4267 5218 4675 4054 4358
Diameters
Twelve Inch
1248 4881 3372 3819 3298 2941 3048 5513 3849 4481 3910 3511 3677 6036 4252 5005 4407 3911 4133 6853 4912 6006 5381 4666 5017
1254 5522 3815 4320 3731 3327 3448 6236 4354 5069 4423 3971 4159 6828 4810 5661 4985 4424 4675 7751 5556 6793 6087 5278 5675
1260 6162 4257 4821 4163 3713 3848 6959 4858 5657 4936 4432 4641 7620 5368 6318 5563 4937 5217 8650 6200 7581 6793 5890 6333
1272 7443 5142 5823 5029 4484 4647 8405 5868 6832 5962 5353 5606 9204 6483 7631 6719 5963 6301 10448 7489 9157 8204 7114 7649
1436 4865 3362 3806 3287 2931 3038 5495 3836 4466 3898 3499 3665 6017 4238 4988 4392 3898 4119 6830 4896 5986 5363 4651 5000
Diameters
Fourteen Inch
1442 5696 3935 4456 3848 3432 3557 6433 4491 5229 4563 4097 4290 7044 4962 5840 5142 4564 4822 7996 5731 7008 6279 5444 5854
1448 6530 4511 5108 4412 3934 4077 7374 5148 5994 5231 4696 4918 8075 5688 6695 5895 5232 5528 9167 6570 8034 7198 6241 6711
1454 7386 5103 5778 4990 4450 4612 8341 5823 6780 5917 5312 5563 9133 6434 7572 6667 5918 6253 10368 7432 9087 8141 7059 7590
1460 8257 5705 6460 5579 4975 5156 9325 6511 7580 6615 5939 6220 10211 7193 8466 7454 6616 6991 11592 8309 10159 9102 7893 8486
1472 9890 6833 7737 6682 5959 6176 11169 7798 9079 7923 7113 7449 12230 8615 10140 8928 7924 8373 13884 9951 12168
Water to Water Specification:
The Water to Water Generator System shall be a Lochinvar Model no. _____________ with ____________ tube bundle heating unit.
The hot water generator shall be constructed of a (vertical) (horizontal) storage tank. The storage tank shall be ________” diameter x
_______” (length) (height) with a ________ gallon capacity. The tube bundle heating unit will be single wall/double wall designed to
recover ____________ GPH with a temperature rise from ________°F to ________°F with _________°F as setpoint temperature when
supplied with ________°F boiler water. The interior of the storage tank shall be glass lined and fired to 1600°F to ensure a molecular
fusing of glass and steel and furnished with magnesium anode(s) to provide protection against corrosion. The storage tank shall be
constructed in accordance with the ASME Boiler and Pressure Vessel Code requirements, stamped and registered with the National
Board of Boiler and Pressure Vessel Inspectors. The storage tank shall have a 125 psi (optional 150 psi) working pressure. The storage
tank shall be furnished with a factory installed heavy steel jacket finished with a baked acrylic enamel finish. The storage tank shall be
completely encased in a minimum of 2” thick, high density polyurethane foam insulation to meet the energy efficiency requirements of
the latest edition of the ASHRAE 90.1 Standard. The tank shall be supplied with a drain valve.
The tube bundle heating unit shall be constructed and stamped according to section VIII of ASME code. The tube bundles shall
be constructed of 3/4” O.D. 20 GA. deoxidized drawn copper tubing. A .75 amp @ 115 volt, 60 Hz, 1/25 HP integral circulator
pump with copper soldered recirculation line shall be provided. The heating units shall be installed in the tank by bolted connection to
the collar flange and tube bundle head.
Optional Tube Bundle Construction: LTW = Single Wall, LTWX = Double Wall
Optional Tube Bundle Material: Cupro-Nickel, Stainless Steel.
Optional Control Package: The Water to Water Generator shall be equipped with isolation valves, two-way self operated temperature
regulator, an inlet wye strainer and all necessary piping.
Optional Equipment: Manual Reset High Limit, Solenoid Valve, Manway, Temperature and Pressure Gauge, ASME Temperature
and Pressure Relief Valve.
Tank Lining Options: Cement tank lining designed to provide effective corrosion resistance against the chemicals and conditions
experienced in the storage of potable water at elevated temperatures.
Steam to Water Specification:
The Steam to Water Generator System shall be a Lochinvar Model no. _____________ with ____________ tube bundle heating
unit. The hot water generator shall be constructed of a (vertical) (horizontal) storage tank. The storage tank shall be ________”
diameter x _______” (length) (height) with a ________ gallon capacity. The tube bundle heating unit will be single wall/double
wall designed to recover ____________ GPH for a temperature rise from ________°F to ________°F with _________°F as setpoint
temperature when supplied with ________ psi steam to the temperature regulator. The interior of the storage tank shall be glass lined
and fired to 1600°F to ensure a molecular fusing of glass and steel and furnished with magnesium anode(s) to provide protection against
corrosion. The storage tank shall be constructed in accordance with the ASME Boiler and Pressure Vessel Code requirements, stamped
and registered with the National Board of Boiler and Pressure Vessel Inspectors. The storage tank shall have a 125 psi (optional 150
psi) working pressure. The storage tank shall be furnished with a factory installed heavy steel jacket finished with a baked acrylic
enamel finish. The storage tank shall be completely encased in a minimum of 2” thick, high density polyurethane foam insulation to
meet the energy efficiency requirements of the latest edition of the ASHRAE 90.1 Standard. The tank shall be supplied with a drain
valve.
The tube bundle heating unit shall be constructed and stamped according to section VIII of ASME code. The tube bundles shall be
constructed of 3/4” O.D. 20 GA. deoxidized drawn copper tubing. A .75 amp @ 115 volt, 60 Hz, 1/25 HP integral circulator pump
with copper soldered recirculation line shall be provided. The heating units shall be installed in the tank by bolted connection to the
collar flange and tube bundle head.
Optional Tube Bundle Construction: LTS = Single Wall, LTSX = Double Wall
Optional Tube Bundle Material: Cupro-Nickel, Stainless Steel.
Optional Control Package: The Steam to Water Generator shall be equipped with an isolation valve, two-way self operated
temperature regulator, an inlet and outlet wye strainer, a steam trap and all necessary piping.
Optional Equipment: Manual Reset High Limit, Solenoid Valve, Manway, Temperature and Pressure Gauge, ASME Temperature
and Pressure Relief Valve.
Tank Lining Options: Cement tank lining designed to provide effective corrosion resistance against the chemicals and conditions
experienced in the storage of potable water at elevated temperatures.
Lochinvar Corporation • 300 Maddox Simpson Pkwy • Lebanon, TN 37090 • 615-889-8900 / Fax: 615-547-1000
HWG-04 (Revised HWG-04)
www.Lochinvar.com
FG-5M-3/11-Printed in U.S.A.
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