HTP CGH-199O Series, Установка, Запуск, Обслуживание, Запасные Части и Гарантия, Страница: 13 / 60

lp-673 Rev. 000 Rel. 001 Date 8.30.18
13
Input Rate
(BTU/hr)
Delta-T (F)
Continuous Draw
(GPH)
Storage Tank Sizes
80 Gallons FHR 119 Gallons FHR 175 Gallons FHR
199,000
40 567 627 657 699
50 454 514 543 585
60 378 438 468 510
70 324 384 413 455
80 284 344 373 415
90 252 312 341 383
100 227 287 316 358
110 206 266 296 338
120 189 249 278 320
130 175 235 264 306
140 162 222 251 293
Table 10 - Peak Hour Demand Worksheet - *This worksheet assumes no water conservation measures
All Calculations are Based on 100
o
F Temperature Rise First Hour Rating with Storage Tank
# of Water
Heaters
# of Storage
Tanks
Input Rate
(BTU/Hr)
Pressure Drop
at 20 GPM
Continuous
Draw (GPH)
80
Gallons
119
Gallons
175
Gallons
1 1 199,000
15 Feet of Head
227 287 317 359
2 1 398,000 455 515 544 586
3 1 597,000 682 742 772 814
4
1 796,000 910 970 999 1,041
1
2 199,000 227 347 406 490
2
3 398,000 455 635 723 849
Table 11 - Recovery Rating - NOTE: First Hour Rating can be increased by using an external mixing valve and increasing tank setpoint temperature.
Example: If installation requires 120F from Mixing Valve, set tank at 140F to increase First Hour Rating.
Peak Hour Demand / First Hour Rating
Use Average Gallons of Hot Water per Usage Times Used During 1 Hour Gallons Used in 1 Hour
Shower 20 X =
Bath 20 X =
Shavings
2 X =
Hands and Face Washing
4 X =
Hair Shampoo
4 X =
Hand Dishwashing
4 X =
Automatic Dishwasher 14 X =
Food Preparation 5 X =
Wringer Clothes Washer 26 X =
Automatic Clothes
Washer
32 X =
Total Peak Hour Demand (FHR)
=
Table 12 - Recovery Rating - NOTE: First Hour Rating can be increased by using an external mixing valve and increasing tank setpoint temperature.
Example: If installation requires 120F from Mixing Valve, set tank at 140F to increase First Hour Rating.
Total Input Rate x Thermal Efficiency
First Hour Rating (FHR) = (Outlet Temperature - Inlet Temperature) x 8.31 + .75 x Total Storage
Example: 2 CGH-199W Water Heaters Input Rate = 398,000 BTU/Hr
Thermal Efficiency = 95%, Outlet Temperature = 140
o
F, Inlet Temperature = 40
o
F, 2 Storage Tanks (80 Gallons Each) = 160 Gallons
FHR = 398,000 x .95 + .75 x 160
(140-40) x 8.31
FHR = 378,100 + 120
831
FHR = 455 + 120 =
575 Gallons