general sizing formula indirect water heater - Bock Water Heaters

Loading...

GENERAL SIZING FORMULA All requirements for hot water should be totaled to obtain the maximum amount of hot water required per hour. Use multiple water heaters when the requirements exceed the capacity of a single heater. If too many heaters in multiples will be required, use a storage tank sized to the gallons of hot water required per peak hour and heat the water in the tank with heaters having a recovery of one-third the capacity of the storage tank. Except in the case of self-service laundries, this total use could be factored by judgement – assuming that not all fixtures will be on at the same time – 75% to 80%, for example.

Sizing Formula for BTUH Input Desired temperature....................................140oF Inlet water temperature .................................50oF 1. Temperature difference..............................90oF 2. Expected flow rate 5 GPM x 60 minutes = 300 GPH 3. BTU/gallon OF (water) ................................ 8.25 Total expected BTUH output is: 90oF x 300 gallons x 8.25 BTUs = 222,750 BTUH To find the input required to produce 222,750 BTUH output, divide by .80 222,750

= 278,438 BTUH input

.80 * The Bock recommended Recovery / Efficiency

INDIRECT WATER HEATER APPLICATIONS The Bock indirect water heaters are designed as a long life water heater for use in domestic and light commercial applications in buildings using boilers for space heating. The concept behind using an indirect is that the boiler heats water when it is not heating the home. This causes the boiler to run more frequently, reducing the boiler stand-by times and associate losses. Installing a dedicated boiler to power an indirect water heater is not an efficient way to heat water. When selecting an indirect water heater, choose a tank size that can easily meet the immediate hot water demands of the customer. Do not count on recovery to help meet the load of a single draw. The reason for this is that the typical boiler will take two

16 www.bockwaterheaters.com

or more minutes to get to operating temperature before it can begin to heat the water in the tank. This means that most or all hot water stored in the tank could be gone by the time the boiler can begin to recover the tank. Example: The customer uses 40 gallons to fill a bathtub. What size indirect should be used? The minimum tank size for this application would be a 50SK. A 40SK will deliver 33 gallons of usable hot water in a single draw and would not be able to fill the tub, resulting in customer complaints.

Engineering Manual

MULTIPLE DWELLING BUILDINGS Tables 11A, 11B and 11C are based on ASHRAE Chapter 32: “Service Water Heater Tables,” use 3 GPM shower heads and figure two to 2.5 people per unit. These tables may not be applicable to FHA sizing for some apartment building categories due to different diversity factors than those applied in the ASHRAE Guide. If larger shower heads or extra-heavy use is predicted, sizing should be based on Table 11. TABLE 11

APARTMENTS MOTELS Light Ave. Heavy HOTELS Gas

95,000

3

Note: U.S. Department of Housing and Urban Development Minimum Property Standards; 4910.1 - 1973, paragraph 615-5 states: “Hot water requirements for multiple dwellings should be based on design criteria shown in the ASHRAE Guide.” TABLE 11A

Apartments, Hotels & Motels Input BTUH

Federal regulations require all shower heads to be a maximum of 2.5 GPM. In older homes and buildings, larger GPM shower heads may be found and should be factored into sizing (see Table 15).

2

1

3

Oil/PG

1-75G-8 1-32E/PG

Apartment Sizing, 4 to 25 units Elect.

Indirects

1-27KW

80SK

110,000

4

3

2

4

1-75G-8 1-51E/PG

1-36KW

80SK

140,000

5

4

3

5

1-75G-8 1-51E/PG

1-40KW

119SK

175,000

6

5

4

6

1-80G

1-71E/PG

1-54KW

119SK

200,000

8

7

6

8

1-80G

1-72E/PG

2-30KW

50SK(2)

230,000

12

10

9

12

1-115G 1-73E/PG

2-36KW

50SK(2)

280,000

20

17

14

20

2-75G-8 1-241E/PG 2-45KW

80SK(2)

360,000

31

23

18

31

2-80G

460,000

37

28

22

37

2-115G 1-361E/PG 3-45KW

N/R

500,000

52

40

32

52

3-80G

2-241E/PG 3-54KW

N/R

600,000

72

55

44

72

3-80G

1-541E/PG 4-45KW

N/R

1,500,000 221 166 132

221

1-150/ 250G

2-71E/PG

1-150/ 250E/PG

3-36KW

TYPE OF FUEL

N/R

70OF RISE

90OF RISE

100OF RISE*

MODEL

MODEL

MODEL

MODEL

OIL P/GAS 4 GAS UNITS ELEC. INDIRECT

32E 32PG 75G-8 50F-15 50SK

32E 32PG 75G-8 50F-15 50SK

32E 32PG 75G-8 50F-15 50SK

51E 51PG 75G-8 80F2C-15 80SK

6 UNITS

OIL P/GAS GAS ELEC INDIRECT

32E 32PG 75G-8 50F-18 50SK

51E 51PG 75G-8 50F-18 50SK

51E 51PG 75G-8 50F-18 80SK

71E 71PG 75G-8 80F-18 80SK

8 UNITS

OIL P/GAS GAS ELEC INDIRECT

51E 51PG 75G-8 80F-15 80SK

51E 51PG 75G-8 80F-15 80SK

51E 51PG 75G-8 80F-15 80SK

71E 71PG 75G-8 80F-18 80SK

OIL P/GAS 10 GAS UNITS ELEC INDIRECT

51E 51PG 75G-8 80F-18 80SK

51E 71PG 75G-8 80F-24 119SK

51E 71PG 75G-8 N/R 119SK

72E 72PG 75G-8 80F-30 119SK

OIL P/GAS GAS ELEC

51E 51PG 75G-8 80F-24

51E 71PG 75G-8 120F-27

241E 241PG 115G 120F-30

INDIRECT

119SK

51E 71PG 75G-8 120F-27 80F-30 119SK

119SK

80SK(2)

OIL P/GAS 15 GAS UNITS ELEC INDIRECT

51E 51PG 75G-8 80F-30 119SK

51E 71PG 75G-8 80F-30 119SK

71E 71PG 80G 120F-30 119SK

241E 241PG 115G 120F-36 80SK(2)

20 UNITS

OIL P/GAS GAS ELEC INDIRECT

71E 71PG 75G-8 120F-30 119SK

71E 71PG 75G-8 80F-36 119SK

72E 72PG 80G 80F-45 80SK(2)

241E 241PG 115G 120F-45 80SK(2)

25 UNITS

OIL P/GAS GAS ELEC INDIRECT

72E 72PG 80G 120F-36 80SK(2)

73E 73PG 115G 120F-45 119SK(2)

241E 241PG N/R 120F-45 119SK(2)

N/R N/R N/R N/R N/R

119SK(2)

N/R

50OF RISE

12 UNITS

N/R = Not Recommended

LIGHT LOAD: Two people per unit; 3 GPM shower or less. Central laundry facilities (for individual laundries add 10% more input). AVERAGE LOAD: Three to five people per unit; 4 to 6 GPM shower. Central laundry facilities (for individual laundries add 10% more input). HEAVY LOAD: More than six people per unit; two baths. Individual laundry facilities. Chart assumes recirculating line. If none, add 20% to required input. All sizing based on 100oF rise in water temperature. Hot water for food service units in motels/hotels should be sized separatetly. o

For 90 F temperature rise, decrease required input by 10%. For 80oF temperature rise, decrease required input by 20%. Engineering Manual

N/R = Not Recommended * Note: Indirects are not recommended for use at outlet temperatures of more than 140OF.

17

TABLE 11B

TABLE 11C

Apartment Sizing, 30 to 72 units

Apartment Sizing, 100 to 150 units

50OF RISE

70OF RISE

90OF RISE

MODEL

MODEL

MODEL

OIL

72E (2) 51E

241E (2) 71E

361E (2) 71E

P/GAS

72PG (2) 51PG

241PG (2) 71PG

361PG (2) 71PG

TYPE OF FUEL

30 UNITS

36 UNITS

48 UNITS

60 UNITS

72 UNITS

GAS

115G (2) 75G-8

—— (2) 75G-8

—— (2) 80G

ELEC.

120C-45 (2) 52C-24

120C-54 (2) 82C-27

(2) 82C-30 ——

OIL

72E (2) 32PP

241E (2) 51E

361E (2) 71E

P/GAS

72PG (2) 32PG

241PG (2) 51PG

361PG (2) 72PG

50OF RISE

70OF RISE

90OF RISE

MODEL

MODEL

MODEL

OIL

150E-800 (2) 241E (3) 71E

250E-800 (2) 361E (3) 73E

250E-1000 (2) 541E (3)361E

P/GAS

(3) 241PG

(3) 361PG

(2) 361PG

(2) 361PG

(3) 73PG

——

——

——

——

(3) 80G

150G-800

150G-800





(2) 82C-45 (3) 52C-27 (4) 82C-30

(2) 82C-54 (3) 52C-36 (4) 82C-36

(3) 120C-36

250E-800 (2) 361E (3) 241E (4) 72E

250E-1000 (3) 361E (4) 241E

250E-1250 (3) 541E (4) 361E

P/GAS

(2) 361PG (3) 241PG (4) 72PG

(2) 541PG (3) 361PG (4) 241PG

(3) 541PG (4) 3611PG

GAS

250G-800 (4) 80G

250G-1000

250G-1500

ELEC.

(3) 82C-45

(3) 82C-54 (4) 82C-45

(6) 82C-54

TYPE OF FUEL

100 UNITS

GAS

ELEC.

OIL GAS

80G

(2) 75G-8 ——

(2) 80G ——

ELEC.

82C-45 (2) 52C-24

120C-54 + 90-Gal. (2) 82C-30

(2) 82C-36 —— 150 UNITS

OIL

241E (2) 51E

361E (2) 71E

(2) 73E

P/GAS

241PG (2) 51PG

241PG (2) 71PG

(2) 73PG ——

(4) 52C-30

GAS

(2) 80G

(2) 115G

ELEC.

(2) 82C-30 ——

120C-54 + 90-Gal. (2) 82C-36

(2) 120C-45

OIL

361E (2) 51E

(2) 73E

200E-600 541E (2) 241E

P/GAS

361PG (2) 71PG

(2) 73PG

541PG

GAS

(2) 80G

——

——

ELEC.

(2) 120C-30

(2) 82C-45

(2) 120C-54

OIL

361E (2) 72E

(2) 241E

250E-800 (2) 361E

P/GAS

361PG 72PG

541PG (2) 241PG

(2) 361PG

Example: Heater capacity = 30 gallons / 10% requires a minimum three-gallon tank.

GAS

(2) 80G

——

150G-800

Note: For commercial and farm applications, consideration should be given to piping size and capacity.

ELEC.

52C-36

(2) 82C-54

(3) 120C-36

18 www.bockwaterheaters.com

EXPANSION TANK SIZING The cold water supply to the water heater may contain a check valve, pressure reducing valve and/or a back flow preventer, creating a “closed system.” As the heated water expands, it creates a pressure buildup in the closed system. This may cause the T&P (temperature and pressure) relief valve to weep and/or discharge water. To prevent this, an expansion tank must be installed in the cold water supply line. Size the expansion tank to 10% of the water heater’s capacity.

Always check with the manufacturer of the expansion tank for sizing.

Engineering Manual

HAIR SALONS

BARBER SHOPS

The size of water heating equipment for a hair salon is based on the number of basins used. Because most hot water is used for washing hair, assume each station or chair uses 12 gallons of hot water per hour based on each shampoo lasting five to six minutes with a maximum of four shampoos per hour per basin. If in doubt, refer to Table 12 below.

Although less hot water is used to wash men’s hair than women’s, more high temperature water is used for hot towel applications during a shave. Use the same calculations and table as for hair salons.

CAR WASHES TABLE 12

Hair Salon Sizing CHAIRS 1-6

GAS

OIL & PG

1 - 75G-8 1 - 51E/PG

ELECTRIC 1 - 15KW

7-8

1 - 75G-8 1 - 71E/PG

1 - 40KW

9-14

1 - 115G

2 - 30KW

15-27

2 - 75G-8 1 - 361E/PG

2 - 54KW

28-35

2 - 115G

1 - 541E/PG

3 - 54KW

36-49

3 - 115G

2 - 361E/PG

4 - 54KW

50-70

4 - 115G

2 - 541E/PG

6 - 54KW

1 - 72E/PG

Most car washes use 110OF water to protect auto finishes, although slightly hotter water may be used to clean tires. A storage tank is recommended and should be set to the highest temperature required for the system. If wheels and tires are washed with water power, storage temperatures can range from 160OF to 180OF and mixed with cold water. Caution: In cold climates, higher temperature water delivered under pressure will vaporize and turn to steam before reaching the vehicle. In northern climate winter, ice removal can be accelerated by pre-rinsing the vehicle with 120OF water. Important: The water heater must be supplied with fresh, outside air and the boiler room door must be kept closed to protect the heater from detergent fumes and aromatic car “freshener” fumes. When mixed with combustion products these fumes will inhibit good combustion and can corrode a heater from the outside in.

PLACES OF WORSHIP Heater size is based on the number of stations/chairs, with incoming water at 40OF and delivered temperature at 140OF. Sizing is based on a 100oF rise in water temperature. For a lower rise, multiply the number of stations/chairs by the appropriate factor before determining the water heater requirement.

Hot water requirements for places of worship will be determined by the largest use, usually food preparation and/or dish washing. If the building is equipped with a machine dishwasher, the hot water requirement will be found in Table 17, pages 25 - 27. If the building does not have a machine dishwasher, base the requirement on two gallons of hot water per person per meal served.

Example: For a 90oF rise in water temperature, multiply the number of stations by .90. For an 80oF rise, multiply the number of stations by .80.

Example: The building has five showers, each rated at 4 GPH flow, 10-minute use; six sinks; and a 2-E Blakeslee dishwasher.

Washing machines for laundry should be sized according to the self-service laundry section on page 25.

General Purpose Water:

Important:

Showers: 5 x 4 x 10 = ..........200 gallons

Corrosive products such as hair spray must be kept away from water heating equipment. When mixed with combustion products, such products can become very aggressive and may actually corrode the heater from the outside in.

Sinks: 6 x 5 =..........................30 gallons TOTAL REQUIREMENT ........230 gallons (may be accomplished using storage)

Make sure that ample fresh outside air is supplied to the heater and that the boiler room door is always closed off from aromatic sprays. Engineering Manual

19

Food Service (from Table 17, pages 25 - 27): 2-E Blakeslee dishwasher, 140OF general purpose 180OF rinse water, 288 gallons (pre-rinse: 180 gallons) Food service (the largest requirement) will also be adequate for shower and sink use, as use normally occurs at other times. Use two Bock Model 115G as preheaters and a Model 75G-8 as a 180OF booster, or two Model 241E or 241PG with a 71E or 71PG as a booster. Without a machine dishwasher, the requirements are: Showers, 5 x 4 x 10 = ....................... 200 gallons Sinks, 6 x 5 = ...................................... 30 gallons Food service, 250 x 1/2 = ................. 125 gallons (1/2 gallon per person per meal) Showers (the largest requirement) will also be adequate for food service use, as use normally occurs at other times. Use one Bock Model 75W-300SD, one 361E, one 361PG or one 118C-54 electric. The application for a baptistry tank is similar to a swimming pool except the warm-up period is shorter, there is no filter or pump and the tank is drained between baptismal services. The desired temperature is usually 80OF to 100OF but may vary. Refer to the Swimming Pool section of this manual on page 27 for sizing information.

Sizing by individual hot water requirements is recommended, rather than sizing by the number of students. It classifies hot water requirements into three categories: 1. General purpose use 2. Cafeteria use Use the food service section of this manual for school cafeteria sizing. 3. Gymnasium shower use A. Schools with showers used only for gym class have relatively stable hot water requirements and are used about 10 minutes per hour with a 50-minute recovery time between shower intervals. Sink hot water requirements are typically low. Size these applications by the number of shower heads to be serviced and their flow rates. B. Schools with moderate after-school use, such as basketball practice and wrestling require longer shower periods. Size for 20 minutes of continuous shower flow. C. Schools with heavy after-school use, such as football practice and larger athletic events should be sized for a 30-minute shower period and long recovery time. A water heating system with a large external storage tank can be used.

Gymnasium Unit Method Sizing To determine the sizing for school gymnasium use, use the following factors:

SCHOOLS Because water heating requirements may use between 5% and 15% of the total energy consumed in a school, proper sizing with efficient systems is very important. Normally, efficient systems follow these principles: 1. Schools may have several hot water requirements such as the gymnasium, cafeteria, clean-up and general purpose use. Separate water systems should be used for each application, with the system located as closely as possible to the end use to avoid long pipe runs of hot water lines. 2. Insulate all hot water lines and storage vessels. 3. The thermostat settings should be lowered to 120OF on water heaters used for general purposes and clean-up. 4. Use booster heaters for cafeteria applications requiring 180OF water for machine dishwashers, but heat only the water used for the sanitizing rinse.

Method of Sizing There are two methods of sizing the hot water requirements of schools. The first is more exacting and will provide a more energy-efficient system by using a separate system for each requirement. The second is if a single system is used for all requirements and there are not extraordinary hot water demands such as afterschool athletic use. 20 www.bockwaterheaters.com

1. Number of shower heads. 2. Flow rate of the shower heads. New facilities will have shower heads at 2 1/2 GPM; older buildings may have much larger shower heads. 3. Temperature rise – the required temperature of hot water less the temperature of incoming cold water. 4. Type of use: light, moderate or heavy. Example: 20 shower heads, 3 GPM flow rate, 20-minute usage per shower head. 20 x 3 x 20 = 1,200 gallons per 20-minute shower requirement Five sinks: 5 GPM usage. 5 x 5 = 25 GPH sink requirement Bradley Washfountain: One 36-inch full-size 4 GPM flow rate, 10 minute usage per hour. 4 x 10 = 40 gallons per 10-minute washfountain requirement TOTAL REQUIREMENTS: 1,200 + 25 + 40 = 1,265 gallons per 20-minute demand period For this requirement, use one Bock Model 250-800 heater with a 1,000-gallon storage tank. A single 250 will provide 527 gallons of hot water in 20 minutes at 90OF rise. The additional 738 gallons are obtained from the 75% usable storage in the 1,000-gallon storage tank. Engineering Manual

Caution: For peak demands beyond normal use go to larger storage.

Sink: 5 GPH usage. 4 x 5 = 20 gallons

For schools with swimming pools see the Swimming Pool sizing section of this manual, page 27.

Slop sink: 20 GPH usage. 1 x 20 = 20 gallons TOTAL USAGE: 70 + 20 + 20 = 110 gallons for 10-minute demand

INDUSTRIAL PLANTS

For this requirement use one Bock Model 241E or 241PG. Refer to Tables 33 - 50, pages 58 - 75.

In small industrial plants all hot water needs can be supplied from a central installation.

Example, Large Plant

For better economy and service in larger plants, hot water should be provided form individual installations at each use location. To determine industrial hot water requirements, group the outlets first. If a central location is advisable, the hot water load for all uses should be totaled and equipment sized accordingly. If individual locations at points of use is more advisable, size each area’s requirements separately. General purpose hot water for showers and Bradley Washfountains should be based on 100% flow for 10 minutes (see Table 13, page 21). Hot water for sinks and slop sinks is based on gallons per hour (see Table 12, page 18). For special applications such as washing, cleaning or product processing, rate of flow times length of use should be determined to give the total requirement. Using this total, Tables 33 - 50, pages 58 - 75 can be used to size the water heater(s).

Example, Small Plant A small industrial plant has one 54-inch Bradley Washfountain, four sinks and one slop sink. Washfountain: 7 GPM flow rate for 10 minutes usage. 7 x 10 = 70 gallons

A large industrial plant has two 54-inch Bradley Washfountains and eight shower heads. Shower heads: eight, each with 2.5 GPM flow rate, 10minute usage. 8 x 2.5 x 10 = 200 gallons per 10-minute usage Bradley Washfountains: Two 54-inch washfountains, 7 GPM flow rate, 10-minute usage each. 2 x 7 x 10 = 140 gallons per 10-minute usage. TOTAL USAGE: 200 + 140 = 340 gallons in 10 minutes. Use two 541PG or 541E water heaters manifolded.

DAIRY BARNS Most dairy barn applications require 180OF water for sterilizing procedures. A large volume of water may be required in a short time span so a storage tank should be used. Where a Bock is replacing an existing electric water heater, if the tank is in good condition it can be used for storage. Note: The standard operating controls on models 51E/PG and 71E/PG are not designed for this application and must be ordered from the factory equipped to provide 180OF water. Bock 30- and 40-gallon units cannot be used in this application.

CARE CENTERS, DORMS, OFFICE BUILDINGS, CLUBS When referring to relevant tables, remember that there are additional considerations in determining the hot water needs for each of the following installations:

Assisted Living Facilities Water heater sizing in this section addresses the hot water necessary for baths, showers, sinks, laundry, general cleaning and kitchen use. 180OF water for machine dishwashing should be provided by a separate booster heater. The ASHRAE Guide indicates the need for 4.5 gallons of hot water per bed per maximum hour and 30 gallons per bed per day. Use caution in determining requirements. Bock highly recommends the installation of anti-scald or mixing valves to maintain 120OF water – water temperatures in excess of 120OF can cause scalding, serious injury or death. Engineering Manual

Office Buildings Sizing is based on hot water requirements for cleaning and lavatory use of occupants and visitors. Food service should be sized separately according to the Food Service section of this manual on page 23. Reasonable fuel economy can be achieved through the use of a time clock (a Paragon or the equivalent) that shuts off the water heater on weekends.

Dormitories Food service is not included in dormitory sizing and must be considered separately. The hot water consumption at a dorm is based on a one-hour peak demand.

21

Country Clubs and Health Clubs

... TABLE 13 continued

Country club use is similar to school gymnasiums, except that such clubs have their heaviest demand during weekends and summer months. To size for clubs, refer to the school gymnasium format, page 19.

Sizing for Dormitories 100% RECOVERY AND NO EXTRA STORAGE AT 70OF NO. OF NO. OF MEN WOMEN

Restaurants at clubs should be sized using Tables 16 and 17. Size for swimming pools using the Swimming Pool guide on page 27.

NO. OF NO. OF MEN WOMEN

PEAK LOADS

OIL POWER ATMO. GAS MODEL GAS MODEL MODEL

10

50 GPH

32E

32PG

75G-8

82C-15

15

75 GPH

32E

32PG

75G-8

82C-18

25

20

100 GPH

32E

32PG

75G-8

82C-24

30

25

125 GPH

32E

32PG

75G-8

82C-36

30

150 GPH

51E

51PG

75G-8

82C-36

30

160 GPH

51E

51PG

75G-8

82C-45

15

40

ELECT. MODEL

35

175 GPH

51E

51PG

75G-8

82C-45

35

180 GPH

51E

51PG

75G-8

82C-45

50

40

200 GPH

51E

51PG

75G-8

82C-45

45

225 GPH

71E

71PG

80W-180SD

82C-54

50

250 GPH

72E

72PG

80W-180SD

82C-54

55

275 GPH

72E

72PG

80G

60

300 GPH

72E

72PG

115G

---

65

325 GPH

241E

241PG

80W-250SD

---

70

350 GPH

241E

241PG

100W-250SD

---

75

375 GPH

241E

241PG

75W-300SD

---

80

400 GPH

241E

241PG

75W-300SD

---

85

425 GPH

241E

241PG

75W-300SD

---

112

90

450 GPH

361E

361PG

75W-300SD or 66W-370SD

---

125

100

500 GPH

361E

361PG

80W-399SD

---

65

ELECT. MODEL

POWER ATMO.GAS GAS MODEL MODEL

45

Sizing for Dormitories 100% RECOVERY AND NO EXTRA STORAGE AT 70OF

OIL MODEL

40

55

TABLE 13

PEAK LOADS

80 94 100

---

Table 13 continued in next column ...

TABLE 14

Hot Water Requirements for Fixtures and Machines TYPE OF FIXTURE OR MACHINE

FLOW RATE

DEMAND

TEMPERATURE

BATHTUB

4 GPM

20 GPH

120OF to 110OF

SINK

3 GPM

5 GPH

120OF to 110OF

CIRCULAR WASH FOUNTAIN, 54” DIAMETER

7 GPM

70 GPH

120OF to 110OF

3.5 GPM

35 GPH

120OF to 110OF

5-IN-A-GROUP SHOWER

12.5 GPM

125 GPH

120OF to 110OF

3-IN-A-GROUP SHOWER

7.5 GPM

75 GPH

120OF to 110OF

5 GPM

50 GPH

120OF to 110OF

12.5 GPM

125 GPH

120OF to 110OF

7.5 GPM

75 GPH

120OF to 110OF

HAIR SALON FIXTURE/STATION

3 GPM

12 GPH

120OF to 110OF

BARBER SHOP LAVATORY

3 GPM

5 GPH

120OF to 110OF

RESTAURANT AUTOMATIC DISHWASHER

4 GPM

7 GPH

140OF

MOP SINK

3 GPM

15 GPH

140OF

BAR SINK

3 GPM

25 GPH

140OF

SINGLE POT SINK

4 GPM

25 GPH

140OF

DOUBLE POT SINK

4 GPM

50 GPH

140OF

TRIPLE POT SINK

4 GPM

75 GPH

140OF

VEGETABLE SINK

4 GPM

40 GPH

140OF

HANDSPRAY DISH PRE-RINSE

4 GPM

45 GPH

140OF

BRUSH-TYPE DISH PRE-RINSE

3 GPM

180 GPH

140OF

CONVEYOR DISH PRE-RINSE *

4 GPM

240 GPH

140OF

AUTOMATIC 9 LB. TO 12 LB. CLOTHES WASHER

5 GPM

36 GPH

160OF

SEMICIRCULAR WASH FOUNTAIN, 54” DIAMETER

CORNER SHOWER CIRCULAR COLUMN SHOWER SEMI-CIRCULAR COLUMN SHOWER

STATIONARY RACK DISHWASHING MACHINE

SEE FOOD SERVICE SECTION

140OF TO 180OF

CONVEYOR DISHWASHING MACHINE

SEE FOOD SERVICE SECTION

140OF TO 180OF

* May be built into dishwasher; frequently used as separate appliance

CAUTION: 180OF water generated by the heating system should be connected only to the rinse inlet of the dishwasher and possibly to the wash tank fill. The pre-wash or scrapping section of the dishwashing operation and the general purpose sinks throughout the kitchen should not receive any water hotter than 140OF unless local health regulations require one pot sink to be serviced by 180OF water. If so, WARNING! 180OF water can cause scalding, serious burns and death! the faucet should be clearly marked. 22 www.bockwaterheaters.com

Engineering Manual

TABLE 15 Shower Head by Manufacturer’s Model NOTE: Federal law limits all new shower heads to 2.5 gallons per minute MANUFACTURER

MODEL 44PB 110DPB 605

ALSONS

AMERICAN STANDARD BRIGGS CENTRAL BRASS CHASE BRASS CHICAGO FAUCET CITADEL

CRANE

DEARBORN BRASS

GPM (105oF) NORMAL FLOW

NOLAND

CITATION NO. 1 DELRIN

4.0

ONDINE

28446

2.75

B-1447 B-1427 HYDRO JET PRESTO

4.0 5.0 4.2 5.0

1466

7.0

HOMART 2055 HOMART 2080 HOMART 2091

10.5 5.5 NOT RATED

NO. 1 STANDARD ACT-O-MATIC NO. 2 FINE SPRAY ACT-O-MATIC NO. 3 NEEDLE SPRAY ACT-O-MATIC ACT-O-MATIC AC-10

4.5

3033

3.0

188.355

10.0

620 FC Brown 620-B

2.75 8.0

C2209

2.75

9-221 9-238 9-250 9-251 ECONOMY 8-2564 ECONOMY 9-221 RAINBEAU 9-238 RAIINBEAU 8-2556 CAPRI 8-2550

3.0 5.5 8.0 8.0 3.5 3.0 5.5 5.5 8.0

NO. 19 NO. 60

5.6 9.1

ELJER FEDERAL HUBER

E-9115

6.0

FEDERAL HUBER

NOT RATED

GYRO-MANY STREAM

NOT RATED

HARVEY MACHINE

HARCRAFT B-2

8.0

INDIANA BRASS

INDIANA BRASS

7.5

K-7325 K-7332 K-7350 K-7370

NOT RATED NOT RATED 7.0 7.5

HO1 HO2

3.0 2.0

Engineering Manual

2.75 2.75

5.5 5.5

DUURMEER

LOGAN

3905 3900 A

17T-8610 T-8612

2.0 3.0 4.0 2.0 2.0 NOT RATED NOT RATED

LEONARD

3.5 3.5 3.5

9.5 2.5 9.3 5.5

2S 3S 4S 2-1S 3-1S 1 3

KOHLER

K-3682 A CATALINA PREMIER

BOYD CADET SPS 1411 HERITAGE N 1301-03 VICTOR R 1311-13

7.5

GYRO BRASS

2.8 3.0

MILWAUKEE FAUCET

2.75

C-10-2S 500 SERIES WIZARD STD. HEAD WIZARD LOW PRES. HEAD

2.0 2.0 2.4 to 3.5 3.5 to 6.0

GPM (105oF) NORMAL FLOW

DIAPHRAGM MAGIC FOUNTAIN

MAGIC FOUNTAIN

ALL

DOLE VALVE

MODEL

2.0 2.0 2.75

DEARBORN

DELTA

MANUFACTURER

MOEN

REPCAL BRASS SCOVILLE SEARS

SLOAN VALVE

3.6 3.0 5.5

1-S-2240 2-S-2240 3-S-2240 S-2250 ANY STREAM NO. 1 S-2250 ANY STREAM NO. 2 S-2250 ANY STREAM NO. 3 SS-2250 ANY STREAM MODEL 1 SS-2250 ANY STREAM MODEL 2 SS-2250 ANY STREAM MODEL 3

4.5 4.5 2.5 9.0

STERLING FAUCET

S-2245 S-194 15-031

4.5 6.0 6.0

SURE FLOW BRASS

NO. 35 NO. 36

3.0 4.5

CLEAR-FLO SUPER-FLO

3.5 to 7.0 4.0 to 9.0

SPEAKMAN

SYMMONS INDUSTRIES UNIVERSAL RUNDLE WRIGHTWAY

7.0 6.0 8.0 6.0 4.0

8-1245

4.0

BUBBLE STREAM

4.0

23

FOOD SERVICE ESTABLISHMENTS When supplying hot water for food service establishments the water heating system must be adequate to meet the maximum probable demand, regardless of whether the peak period exists for just one hour or much longer. The system must be capable of supplying hot water at two temperatures: 140OF for general purpose water and 180OF for sanitizing water. Sanitizing water must be maintained at 180OF or higher for the sanitizing rinse of all tableware in restaurants and other food service establishments to insure satisfactory bacteria reduction and to promote rapid air drying. Most health department codes specify a 180OF rinse of tableware. The amount of hot water to be supplied will be governed by meal-serving capacity and the dishwashing equipment being used. As food service establishments vary considerably in size and dish washing methods range from individual hand washing to the largest continuous-feed automatic dishwashing machines, hot water requirements range from a residential water heater to the largest commercial units.

Example: A restaurant serving 200 to 400 meals daily. A Blakeslee Model l-ER dishwasher is specified. Refer to Table 17 to find the manufacturer of this specified machine and the Bock water heating equipment required to furnish 180OF water. Bock models required to boost the water temperature from 140OF to 180OF are found in Table 17, Section A (if 140OF water is available). To determine the amount of 140OF general purpose water necessary for the restaurant, refer to Table 17 and size the additional load for the pre-scrapper, pot sinks, etc. If possible, use one water heater to supply all the 140OF general purpose water, plus the 140OF water to be furnished to the dishwasher. Water temperature will be boosted to 180OF by a second water heater. To size, total the general purpose water (for sinks, pot washers, cleaning, etc.) from Table 17 and add this to the total amount of 180OF water required for the specific dishwasher shown in Table 17, Section A.

Additionally, peak demands of dishwashing machines also vary widely and are not generally a consistent factor of the number of meals served during any given period. Table 17 has been formulated to help the architect, engineer, builder or installer to quickly determine the appropriate Bock water heater according to the type of dishwashing being used.

Example: Small installations

Machine Dishwashing

Tray-type dishwasher sizing can be estimated assuming that the average 60-tray single tank will require 90 GPH of 180OF water. Fifty trays will require 75 GPH of 180OF water, 40 trays 60 GPH. Approximately 1 1/2 times the number of trays per hour determines the gallons of 180OF water needed per hour.

To make the selection of water heating equipment as simple as possible, Table 17, pages 25-27, lists various models of dishwashing machines and the recommended Bock water heaters needed to meet requirements. Similar requirements of makes not listed in the table can be compared to like requirements that are listed.

Installation Issues 1. A flow pressure of 20 PSI is ideal for a satisfactory rinse. A flow pressure above 20 PSI would cause atomization of the rinse spray and unsatisfactory flushing of washing solution residue from the dishes and tableware. Temperature of the dishes would not be maintained at a level capable of destroying harmful bacteria. An uncontrolled rate of flow would also waste hot water and the heating system would probably be incapable of meeting the unanticipated demand for hot water or maintaining proper temperature. The installation of pressure regulators is strongly advised when the line pressure (flowing) exceeds 20 PSI. 2. The booster providing 180OF water should be located as close to the dishwasher as possible to minimize heat loss in the pipe run, thereby assuring 180OF water at the dishwasher. All hot water piping should be insulated to a 3/4” minimum.

24 www.bockwaterheaters.com

It may be desirable to select one water heater for all 180OF requirements and install a mixing valve to supply 140OF water. (Recirculating, holds temperature more steady, could be on a manual switch.)

Tray-type dishwasher

TABLE 16

Water Mixing Valves Percentage of hot water automatically mixed with cold water to obtain the desired outlet temperature. Temp. of mixed water

COLD WATER SUPPLY 40OF

50OF

60OF

70OF

80OF

90OF

100OF

180OF















170OF

92.8

92.3

91.7

90.9

90

88.8

87.5

160OF

86

85

83.3

82

80

78

75

150OF

78.5

76

75

73

70

67

62.5

140OF

71

69

67

64

60

55.5

50

130OF

65

61.5

58

54.5

50

44

37.5

120OF

57

54

50

45

40

33

25

110OF

50

46

41.5

35

30

21

12

100OF

43

38

33

27

20

11

11

Engineering Manual

TABLE 17

MACHINE DISHWASHING REQUIREMENTS A B MAKE & MODEL NUMBER

ADAMATION 10-20 SL-3, CA2M CA, CA-1 CA-2, CA-4 CA-4 SUPER WASH SL-1390 CSL-1390 AMERICAN DISH SERVICE AHC, L90-3DW, WC, ET-AH HT-25 AC, ETA AH, L72-3DW, WC A, AFC, AFC-3D, AF-3D (10 SEC), L603DW, WC, AF, AFC-3D, AF-3D (90 SEC) AF-B 5AH ADC-44 5 5AG BLAKESLEE A-7, B-7, BC-7, D-7, DC-7 1-E, 1-ER, 1-L, 1-LR, 1-M, 1-MR, F1-E, F1-ER, F1-L, F1-LR, F1-M, F1-MR, XFA2E, XF2-ER, XFA2-ER, XF2-L, XFA2-L, XF2-LR, FA2-LR, XF2-M, XFA2-M, XF2MR, XFA2-MR, XF3-E, XFA3-E, XF3-L, XFA3-L, XF3-M, XFA3-M 2-E, 2-ER, 2-L, 2-LR, 2-M, 2-MR, 3-E, 3L, 3-M, F2-E, F2-ER, F2-L, FA2-L, F2-LR, FA2-LR, F2-M, FA2-M, F2-MR, FA2-MR, F3-E, FA3-E, F3-L, FA3-L, F3-M, FA3-M XF1-E, XFA1-E, XF1-ER, XFA1-ER, XF1L, XFA1-L, XF1-LR, XFA1-LR, XF1-M, XFA1-M, XF1-MR, XFA1-MR UC-21, D-9 D-8, D8-LT DOUBLE D-8, DOUBLE D8-LT, R-L,R-M, R-PL, R-PM, FA-L, FA-M, FA-PL, FA-PM RA-L, RA-M, RA-PL, RA-PM F-L, F-M, F-PL, F-PM, R-CC, R-EE, R-LL, R-MM FA-EE, FA-LL, FA-MM, RA-EE, RA-LL, RA-MM, R-PCC, R-PEE, R-PLL, R-PM, FA-PEE, RA-PLL, RA-PMM, RA-PEE, RAPLL, RA-PMM, R-EEE, R-LLL, R-MMM, FA-EEE, FA-LLL, FA-MMM, RA-EEE, RA-LLL, RA-MMM, F-EE, F-LL, F-MM, F-PEE, F-PLL, F-PMM, F-EEE, F-LLL, F-MMM, XF-EE, XF-LL, XF-MM, XF-PEE, XF-PLL, XF-PMM XF-LLL, XF-XMM XF-MMM, XF-L, XF-M, XF-PL, XF-PM CHAMPION T-6A, T-7A, T-7AC 1-KAB, 1-KACB 20K Series, 30K Series 40K Series, 60K Series, PR-96, PR-120 64K Series UC Series U-HB, U-H1 TUW U-LD D-HB, D-H1, D-LF 44WS, 66WS, 64KB, 64-KPRB

Engineering Manual

180OF WATER REQUIRED GPH

BOCK WATER HEATER MODEL TO BOOST EXISTING 140OF WATER TO 180OF

OIL

ELECT.

GAS

POWER GAS

BOCK WATER HEATER MODEL TO SUPPLY 180OF WATER AT 140OF RISE

OIL

ELECT.

POWER GAS

GAS

234 420 417 417 288 294 294

1-51E 1-72E 1-72E 1-72E 1-51E 1-51E 1-51E

1-24KW 1-45KW 1-45KW 1-45KW 1-30KW 1-30KW 1-30KW

1-75G-8 1-80G 1-80G 1-80G 1-75G-8 1-75G-8 1-75G-8

1-51PG 1-72PG 1-72PG 1-72PG 1-51PG 1-51PG 1-51PG

1-361E 2-361E 2-361E 2-361E 2-73E 2-73E 2-73E

2-40KW 3-54KW 3-54KW 3-54KW 2-54KW 2-54KW 2-54KW

1-100W-199SD 1-80W-505SD 1-80W-505SD 1-80W-505SD 1-100W-300SD 1-65W-370SD 1-65W-370SD

44 61 51 55

1-51E 1-51E 1-51E 1-51E

1-15KW 1-15KW 1-15KW 1-15KW

1-75G-8 1-75G-8 1-75G-8 1-75G-8

1-51PG 1-51PG 1-51PG 1-51PG

1-51E 1-51E 1-51E 1-51E

1-24KW 1-24KW 1-24KW 1-24KW

1-75G-8 1-75G-8 1-75G-8 1-75G-8

1-51PG 1-51PG 1-51PG 1-51PG

68

1-51E

1-15KW

1-75G-8

1-51PG

1-51E

1-24KW

1-75G-8

1-51PG

88 101 120 126 168

1-51E 1-51E 1-51E 1-51E 1-51E

1-30KW 1-15KW 1-15KW 1-15KW 1-24KW

1-75G-8 1-75G-8 1-75G-8 1-75G-8 1-80G

1-51PG 1-51PG 1-51PG 1-51PG 1-51PG

2-73E 1-72E 1-72E 1-72E 1-72E

2-54KW 1-40KW 2-40KW 2-40KW 2-40KW

1-75G-8 1-80G 1-80G 1-80G 1-80G

2-73PG 1-72PG 1-72PG 1-72PG 1-72PG

117

1-51E

1-15KW

1-75G-8

1-51PG

1-72E

2-40KW

1-80G

1-72PG

420

1-72E

1-45KW

1-80G

1-72PG

2-361E

3-54KW

1-150G-400

2-361PG

288

1-51E

1-30KW

1-75G-8

1-51PG

2-73E

2-54KW

1-100W-300SD

2-73PG

720

1-361E

2-36KW

2-75G-8

1-361PG

3-361E

5-54KW

1-200G-850

3-361PG

35 72

1-51E 1-51E

1-15KW 1-15KW

1-75G-8 1-75G-8

1-51PG 1-51PG

1-32E 1-51E

1-24KW 1-27KW

1-75G-8 1-75G-8

1-51PG 1-51PG

282

1-51E

1-30KW

1-75G-8

1-51PG

2-73E

2-54KW

1-100W-300SD

2-73PG

282

1-51E

1-30KW

1-75G-8

1-51PG

2-73E

2-54KW

1-100W-300SD

2-73PG

288

1-51E

1-30KW

1-75G-8

1-51PG

2-73E

2-54KW

1-100W-300SD

2-73PG

360 720

1-72E 1-361E

1-40KW 2-36KW

1-80G 2-75G-8

1-72PG 1-361PG

2-361E 3-361E

3-40KW 5-54KW

1-80W-450SD 1-200G-850

----3-361PG

1-27KW 1-40KW 3-54KW 2-54KW 3-40KW 3-54KW 1-24KW 1-24KW 1-24KW 1-24KW

1-75G-8 1-80G 1-150G-400 1-100W-300SD 1-80W-425SD 1-80W-505SD 1-75G-8 1-75G-8 1-75G-8 1-75G-8 1-75G-8

144

74 107 416 282 348 426 33 37 44 66 130

1-361PG 2-361PG 2-361PG 2-361PG 2-73PG 2-73PG 2-73PG

1-75G-8

1-51E 1-51E 1-72E 1-51E 1-71E 1-72E 1-51E 1-51E 1-51E 1-51E 1-51E

1-15KW 1-15KW 1-40KW 1-30KW 1-36KW 1-45KW 1-15KW 1-15KW 1-15KW 1-15KW 1-15KW

1-75G-8 1-75G-8 1-75G-8 1-75G-8 1-80G 1-80G 1-75G-8 1-75G-8 1-75G-8 1-75G-8 1-75G-8

1-51PG 1-51PG 1-72PG 1-51PG 1-71PG 1-72PG 1-51PG 1-51PG 1-51PG 1-51PG 1-51PG

1-51E 1-72E 1-150-400E 1-73E 1- 361E 2-361E 1-32E 1-32E 1-32E 1-32E 1-51E

1-51PG 1-72PG ---2-73PG --2-361PG 1-51PG 1-51PG 1-51PG 1-51PG 1-51PG

25

TABLE 17

MACHINE DISHWASHING REQUIREMENTS B A MAKE & MODEL NUMBER

CHAMPION, cont. 40KB, 40-PKRB, 44KB, 44-KPRB, KL-44, KL-66 54-KB, 54-KBRP UC-C UC-CW W-6 FOOD EQUIPMENT DIVISION – McGRAW-EDISON TKM-20 TKM-27, TKMC-27 TKM-44, TKM-66R TKM-64 thru TKM-115 TKM-215 thru TKM-324 GENERAL ELECTRIC FOOD SVS. EQPT. 3T-30B, SK-10B, SK-30B 50-20, SK Series, 50SMT SS40B, SS48B, SS62B, SS70B, SS76B, SS84B SS64B, SS80B, SS86B, SS102B, SS100B, SS116B 115-20, 165-20, 225-20, 275-20 HOBART UM Series WM Series AM Series, LM-3T3 C-44, CRS-66, CWS-66, CPW-80, C54CRS-76, FR-54, FRC-54, CWS-76, CPW-90, FT-400 Series C-64, CRS-86, FR-64, FRC-64, CPW100, C-81, CRS-103, FR-81, FRC-81, CWS-103, CPW-117, CS-100, CS-117 FT-200, 300 and 500 Series INSINGER Ensign 40-2, 45SA Commodore 15, Commander 18, 50SA Admiral 120-5, Admiral 120-7, Admiral 60-2, Admiral 66-2 MiniFlite S-9 thru S-12, Admiral RC-12 FPW thru RC-20 RPW Speeder 5, Speeder 86-1, clipper 9, Clipper 96-1, Super 8, Super 106-1, Super F-106-1, Master 165-DA-3, 60-DA, 85DA, 85-DA7, 115-DA, 135-DA, 165-DA, 185-DA, 225-DA, 250-DA, 275-DA Clipper RC-16 FPW thru RC-21 FPW, Clipper RC-16 RPW thru RC-21 RPW, Master RC-18 thru RC-33, Master RC-18 FPW thru RC-33 FPW, Master RC-18 RPW thru Master RC-33 RPW Clipper RC-16-EW-2 thru RC-31 RPW-EW-2, Clipper RC-16 RPW-EW-3 thru RC-31 PRW-EW-3, Master RC-18 RPW-EW-3 thru RC-33 RPW-EW-3, Master HRC-18 RPW-EW-3 thru HRC-33 PRW-EW-3 Commander 18-4, Commander 18-4C, Commander 18-4H Admiral 44, Admiral 66-3 Speeder 65, Speeder 86-3 Super 106-2 Century 14 Clipper (all) Master (all) Defender (all) CA-3 DA-3, Trac 321-2 Trac 321-2 RPW

26 www.bockwaterheaters.com

180OF WATER REQUIRED GPH

BOCK WATER HEATER MODEL TO BOOST EXISTING 140OF WATER TO 180OF

OIL

ELECT.

GAS

POWER GAS

300

1-51E

1-30KW

1-75G-8

1-51PG

325 336 426 852

1-51E 1-51E 1-72E 2-71E

1-30KW 1-30KW 1-45KW

1-75G-8 1-75G-8 1-80G 1-65W-370SD

1-51PG 1-51PG 1-72PG ___

60 116 420 624 414

1-51E 1-51E 1-72E 1-241E 1-72E

1-15KW 1-15KW 1-45KW 2-30KW 1-40KW

77 103

1-51E 1-51E

426

BOCK WATER HEATER MODEL TO SUPPLY 180OF WATER AT 140OF RISE

OIL

ELECT.

1-361E 2-54KW

GAS

POWER GAS

1-65W-370SD

___

1-361E 2-54KW 1-65W-399SD 1-361E 2-54KW 1-65W-399SD 2-361E 3-54KW 1065W-625SD 2-150E-400 1-250G-1000

___ ___ 2-361PG ___

1-75G-8 1-75G-8 1-80G 2-75G-8 1-80G

1-51PG 1-51PG 1-72PG 1-241PG 1-72PG

1-51E 1-72E 2- 361E 1-200E-650 2-361E

1-24KW 1-75G-8 1-40KW 1-80G 3-54KW 1-80W-505SD 4-54KW 1-150G-800 3-54KW 1-80W-5-5SD

1-15KW 1-15KW

1-75G-8 1-75G-8

1-51PG 1-51PG

1-51E 1-71E

1-27KW 1-36KW

1-75G-8 1-80G

1-51PG 1-71PG

1-72E

1-45KW

1-80G

1-72PG

2-361E

3-54KW

1-200G-450

2-361PG

300

1-51E

1-30KW

1-75G-8

1-51PG

1-361E

2-54KW 1-165W-370SD

1-361PG

282

1-51E

1-30KW

1-75G-8

1-51PG

1-361E

2-54KW 1-100W-300SD

2-361PG

70 68 122

1-51E 1-51E 1-51E

1-15KW 1-15KW 1-15KW

1-75G-8 1-75G-8 1-75G-8

1-51PG 1-51PG 1-51PG

1-51E 1-51E 1-72E

1-24KW 1-24KW 1-45KW

1-75G-8 1-75G-8 1-80G

1-51PG 1-51PG 1-72PG

450

1-72E

1-45KW

1-80G

1-72PG

2-361E

3-54KW

1-200G-450

2-361PG

282

1-51E

1-30KW

1-75G-8

1-51PG

1-361E

2-54KW 1-100W-300SD

1-361PG

348

1-71E

1-36KW

1-80G

1-71PG

1-361E

3-40KW

61 120

1-51E 1-51E

1-15KW 1-15KW

1-75G-8 1-75G-8

1-51PG 1-51PG

1-51E 1-72E

1-24KW 1-45KW

416

1-72E

1-40KW

1-80G

1-72PG

480

1-73E

1-54KW

1-115G

300

1-51E

1-30KW

312

1-51E

480

1-80W-450SD

1-51PG 1-72PG 2-361PG ---2-361PG

-----

1-75G-8 1-80G

1-51PG 1-72PG

2-361E

3-54KW 1-80W-505SD

2-361PG

1-73PG

2-361E

3-54KW

1-200G-450

2-361PG

1-75G-8

1-51PG

1-361E

2-54KW 1-65W-370SD

----

1-36KW

1-75G-8

1-51PG

1-361E

2-54KW 1-65W-399SD

----

1-73E

1-54KW

1-115G

1-73PG

2-361E

3-54KW 1-65W-625SD

2-361PG

65

1-51E

1-15KW

1-75G-8

1-51PG

1-51E

1-24KW

1-51PG

210 222 300 228 222 360 306 70 140 140

1-51E 1-51E 1-51E 1-51E 1-51E 1-72E 1-51E 1-51E 1-51E 1-51E

1-24KW 1-24KW 1-30KW 1-24KW 1-24KW 1-40KW 1-30KW 1-15KW 1-15KW 1-15KW

1-75G-8 1-75G-8 1-75G-8 1-75G-8 1-75G-8 1-80G 1-75G-8 1-75G-8 1-75G-8 1-75G-8

1-51PG 1-51PG 1-51PG 1-51PG 1-51PG 1-72PG 1-51PG 1-51PG 1-51PG 1-51PG

1-361E 1-361E 1-361E 1-361E 1-361E 2-361E 1-361E 1-51E 1-51E 1-51E

1-75G-8

2-40KW 1-100G-180 1-361PG 2-40KW 1-100G-180 1-361PG 2-54KW 1-65W-370SD ----2-40KW 1-100W-250SD 1-361PG 2-40KW 1-100G-180SD 1-361PG 3-40KW 1-80W-425SD ----2-54KW 1-65W-370SD ----1-24KW 1-75G-8 1-51PG 1-40KW 1-75G-8 1-51PG 1-40KW 1-75G-8 1-51PG

Engineering Manual

TABLE 17

MACHINE DISHWASHING REQUIREMENTS A B MAKE & MODEL NUMBER

INSINGER, cont. Ensign 40-2, Ensign 60-2oM-NSU, 8520M, 135-20M-NSU, 185-20M-NSU 250-20M-NSU 45SA5-F1, 45SA5-F2 JACKSON 10A, 10AB, 10APRB, 10APRB-H, 50APR, 50APRB, JV-24A, JV-24AF, JB-24B, JV-24BF JL-100A, JL-100G, JL-100, JL-100PRB, JL-100PR J-44, SJF-44, 39-C, 44-C 4-A, DJF-48, 4-ARD, 6-A, DJF-60, 6-ARD, ROTO DR JR, DJF-64, 1323 thru 2673 (Suffix ‘B’ models above have integral booster) JP-24 Series 24LT Series 200 Series Temp Star, SDS Conserver I Conserver II 10 Series AJ-44, AJ-66, AJ-80 Vision Series MOYER DIEBEL 501LT, 501HT MD-18 Series MH6L, MH60 501HTN MH6N STERO SF-1RA, SF-2RA, SF-2DRA, SDRA, SD2RA SCT-44, SCT-44-10, SCT-76S, SCT76SC, SC-1-SCT-44, SC-1-SCT-44-10, SC-1-SCT-54, SC-2-4, SC-6-4, SC-1-2-4, SC-1-6-4, SC-5-6-4 SCT-64, SCT-76, SCT-80, SCT-94, SCT94S, SCT-95SC, SCT-108S, SCT-108SC, SCT-108, SCT-120, SCT-120SM, SCT120S, SCT-120SC, SCT-105SM, SC-1SCT-64, SC-1, SC-76, SCT-80, SCT-94, SCT-108, SCT-120, SC-5-SCT-64 SCT-76SM, STPC-15, STPC-18, STPC19, STPC-19PS, STPC-20, STPC-22, STPC-24, STPC-24D, STPC-26, STPC26D SC-2-3-4, SC-6-3-4, SC-2-7-4, SCT-44, SC-3-4, SCT-44-10SC-3-4, SCT-54SC-34, SC-1-2-7-4, SC-1-6-3-4, SC-5-2-3-4, SC1-6-7-4, SC5-6-3-4, SC-5-2-7-4, SCT76S, SC-3-4, SCT-44, SC-1-3-4, SCT-4410, SC-1-3-4, SCT-54 SC-1-3-4 STPC-10, STPC-12HS, STPC-12PS STPCW-10, STPCW-12HS, STPCW12PS, STPCW-15HS, STPCW-15PS STPCW-15 thru STPCW-26 VULCAN-HART CU-16BTA, R-16BTA, 3D20T, CD20T A-44 thru A-54 A-64 thru A-98 CP-3 Series, HP-3 Series, CP-2 Series WELLS AD-20 Series AD-44, PC-12 AD-64, AD-80, PC-19, PC-26

Engineering Manual

BOCK WATER HEATER MODEL TO BOOST EXISTING 140OF WATER TO 180OF

BOCK WATER HEATER MODEL TO SUPPLY 180OF WATER AT 140OF RISE

180OF WATER REQUIRED GPH

OIL

ELECT.

GAS

POWER GAS

OIL

61

1-51E

1-15KW

1-75G-8

1-51PG

1-51E

1-24KW

1-75G-8

1-51PG

220 36

1-51E 1-51E

1-24KW 1-15KW

1-75G-8 1-75G-8

1-51PG 1-51PG

1-361E 1-51E

2-40KW 1-24KW

1-115G 1-75G-8

1-361PG 1-51PG

1-51E

1-15KW

1-75G-8

1-51PG

1-51E

1-24KW

1-51E

1-15KW

1-75G-8

1-51PG

1-72E

1-40KW

1-80G

1-72PG

1-72E

1-40KW

1-80G

1-72PG

2-361E

3-54KW

1-80W-505SD

2-361PG

1-51E

1-30KW

1-75G-8

1-51PG

2-73E

2-54KW

1-75G-8

2-73PG

1-51E 1-51E 1-51E 1-51E 1-51E 1-51E 1-51E 1-51E

1-15KW 1-15KW 1-15KW 1-15KW 1-15KW 1-15KW 1-24KW 1-24KW

1-75G-8 1-75G-8 1-75G-8 1-75G-8 1-75G-8 1-75G-8 1-75G-8 1-75G-8

1-51PG 1-51PG 1-51PG 1-51PG 1-51PG 1-51PG 1-51PG 1-51PG

1-51E 1-51E 1-51E 1-51E 1-72E 1-51E 1-361E 1-361E

1-24KW 1-24KW 1-24KW 1-24KW 2-40KW 1-24KW 2-40KW 2-40KW

1-75G-8 1-75G-8 1-75G-8 1-75G-8 1-80G 1-75G-8 1-100W-250SD 1-100W-250SD

1-51PG 1-51PG 1-51PG 1-51PG 1-72PG 1-51PG 1-361PG 1-361PG

37 66

1-51E 1-51E

1-15KW 1-15KW

1-75G-8 1-75G-8

1-51PG 1-51PG

1-51E 1-51E

1-24KW 1-24KW

1-75G-8 1-75G-8

1-51PG 1-51PG

103

1-51E

1-15KW

1-75G-8

1-51PG

1-71E

1-36KW

1-80G

1-51PG

417

1-51E

1-40KW

1-80G

1-72PG

2-361E

3-54KW

1-80W-505SD

1-51PG

277

1-51E

1-27KW

1-75G-8

1-51PG

1-241E

3-40KW

1-100W-300SD

2-51PG

330

1-72E

1-36KW

1-75G-8

1-71PG

1-361E

2-54KW

1-65W-399SD

1-361PG

295

1-51E

1-30KW

1-75G-8

1-51PG

1-361E

3-54KW

1-65W-370SD

1-361PG

465

1-73E

1-54KW

1-115G

1-73PG

1-200E-450

4-54KW

1-200G-450

-----

576

1-241E

2-30KW

----

1-241PG

1-150E-600

4-54KW

1-200G-650

-----

390

1-72E

1-40KW

1-80G

1-72PG

2-361E

3-40KW

1-80W-505SD

-----

120 480 390 420

1-51E 1-73E 1-72E 1-72E

1-15KW 1-54KW 1-40KW 1-45KW

1-75G-8 1-115G 1-80G 1-80G

1-51PG 1-73PG 1-72PG 1-72PG

1-72E 2-361E 2-361E 2-361E

1-45KW 3-54KW 3-40KW 3-54KW

1-80G 1-65W-625SD 1-80W-505SD 1-115G

-----------------

102 480 300

1-51E 1-73E 1-51E

1-15KW 1-54KW 1-30KW

1-75G-8 1-115G 1-75G-8

1-51PG 1-73PG 1-51PG

1-72E 2-361E 2-51E

1-36KW 3-54KW 2-45KW

1-80G 1-65W-625SD 1-65W-370SD

-------------

26 29 52 52 111 60 234 234

ELECT.

GAS

1-75G-8

POWER GAS

1-51PG

27

SELF-SERVICE AND COMMERCIAL LAUNDRIES Self-Service Laundries Self-service laundries typically require 2 1/2 gallons of water per pound of laundry, which should be adequate for hot water storage plus a recovery capacity equal to the hourly demand of automatic washing machines. Although hot water demands will not be uniform, there may be times when all machines would be in operation simultaneously – most likely to occur on weekdays or at night. This possible one-hour peak demand should always be given serious consideration when sizing for self-service laundry hot water requirements. Bock uses a calculation of two cycles per hour. This number – multiplied by the number of machines by the gallons of hot water used by each machine – gives the amount of hot water used per hour. This known GPH, along with temperature of water required, will determine the capacity needed. Consult manufacturers for sizes of machines. Hot water requirements for a self-service laundry are determined through the following steps: 1. From the rating plate on the machine or from the manufacturer’s literature, find hot water usage in GPH for each automatic washer.

ber of high volume water heaters required to supply the laundry’s probably hourly demand.

Example: Laundry with 30 washers Each washer has a capacity of 26 GPH of 140OF water. Laundry operates on one-hour peak demand. Total Hourly Usage: 30 x 26 = 780 gallons @ 140OF Using Tables 43-44, pages 68 - 69, Bock models 80G, 190PG, and 72E would satisfy demand. At a 90OF rise, the following sizing recommendations can be made: 1) (3)-80G units can provide: Recovery: 3 x 212 GPH = 636 GPH Usable Storage: 3 x 80 gal. x 0.8 = 192 gal. Total 1-hr delivery = 636 GPH + 192 gal. = 828 gallons 2) (3)-190PG units can provide: Recovery: 3 x 191 GPH = 573 GPH Usable Storage: 3 x 113 gal. x 0.8 = 271 gal. Total 1-hr delivery = 573 GPH + 271 gal. = 844 gallons 3) (3)-72E units can provide: Recovery: 3 x 212 GPH = 636 GPH Usable Storage: 3 x 67 gal. x 0.8 = 161 gal. Total 1-hr delivery = 636 GPH + 161 gal. = 797 gallons

A. Few self-service laundries use the pre-wash soak cycle. This factor should be ascertained, however, and the gallonage used in the soak cycle subtracted from the unit rating.

Note: This formula is for average conditions which include an occasional peak demand. When all machines are used constantly, the preceding formula must be doubled (assuming a half-hour cycle per machine).

B. If the rating for each washer cannot be found, use 25 GPH for each unit (if one cycle per hour).

Commercial Laundries

2. Add together all the individual washer requirements for the maximum hourly demand. 3. From Tables 33-50, pages 58 - 75, determine the num-

The best way to determine the cycle of hot water needs of a commercial laundry is to contact the equipment manufacturer. If this cannot be done, assumed three gallons of hot water per one pound of laundry with half the required water being hot. Bock recommends 160OF for this water.

SWIMMING POOLS, HOT TUBS AND BAPTISTRIES Size a hot tub based on its gallon capacity. Obtain this quantity from either the manufacturer or by using steps 1 and 2 of the Swimming Pool instruction section on page 28. Determine how long it will take to fill the tub.

To determine the temperature rise, subtract the desired temperature from the norm for the area.

With these known factors, size the water heater using Deliverability Tables 33-50, pages 58 - 75. These tables show the capability of different types of Bock water heaters for a given length of time at a desired temperature.

Refer to Table 37-38, pages 62-63 to find the maximum delivery in gallons (Use Tables 39-40, pages 64-65 for a 65OF rise).

To use these tables, find the temperature rise, which depends on water temperature norms for the geographical region: Northern Tier States – 45OF to 55OF Central Tier States – 55OF to 60OF Southern Tier States – 65OF to 75OF 28 www.bockwaterheaters.com

Example: 125OF water in a South Tier state. Result: 125OF minus 60OF to 65OF temperature rise.

Example: To fill a 120-gallon hot tub in 15 minutes, look down the 15 MINUTE column to 120 gallons or higher. Then move left across that space to find the correct Bock model water heater. This example requires a 72PG, 80G, or 72E. Use this same method to size a baptistry. Note: Aerated hot tubs have approximately 50% greater heat loss than standard tubs. To maintain temperature, Bock recommends adding half of the total heat loss to the sizing and increasing the input by 50%. Engineering Manual

The first criterion is the maximum temperature rise in degrees Fahrenheit (OF), for initial heat-up (Delta T) to establish the desired pool temperature. The temperature rise is determined by the known desired pool temperature and then by the ambient air conditions at the time the pool water is initially heated.

FIGURE 20: Piping Diagram SWIMMING POOL MANIFOLD; BOCK MODELS 32E, 51E

The second criterion is the time allowed for the initial heating of the pool or spa water (for example; 24 or 48 hours). The third criterion is the size of the swimming pool or spa. The water heater must be sized large enough for initial heat-up within the desired time frame. From these criteria, calculate the hourly BTU input. BTUH input is the basis used to find the correct Bock water heater model. After the BTUH calculation has been determined, refer to Tables 33-50, pages 58 - 75 to find the exact Bock water heater to fit the requirements. Steps to finding the BTU hourly input: 1. Cubic feet - length X width X average depth. 2. Gallons - cubic feet X 7.5. 3. Hourly BTU input = gallons X factor.

1 2 3 4 5 6 7 8 9

A. Factor is found in Table 18, this page, by noting the hours desired for heating the swimming pool or spa water, plus the temperature rise. B. To find the temperature rise, first decide the ideal water temperature for the pool or spa, then subtract the yearly average outdoor temperature for the month pool heating will begin. Call the local weather station to find the yearly average temperature for the area. Example: Swimming pool is 40’ x 18’ x 5’ = 3600 cubic feet. 3600 X 7.5 = 27,000 gallon capacity. Need 48 hours to heat swimming pool. Average water temperature at initial heat-up is 60OF. Desire 80OF water temperature in pool. 80 - (minus) 60 = 20OF rise. Factor = 5 (with 48 hours heating time and 20oF rise) refer to Table 18. BTUH = 27,000 gallons X 5 = 135,000 BTUH input. A Bock Model 5lPG or a 5lE would be appropriate for this example. Refer to Tables 33-50, pages 58 - 75. In a swimming pool or spa installation, the major consideration when using a storage-type water heater is the prevention of condensation inside the unit. Condensation is held to a minimum when the temperature in the water heater is maintained above 120OF. To do this, use a bypass, which will increase the life of the water heater tank and combustion chamber appreciably (water temperature higher than 120OF has no other function). Only one-fourth of the water goes through the water heater. The remaining three-fourths is bypassed around the water heater. The desired water temperature is maintained by adjusting one valve. The bypass valve should be left open far enough to maintain water temperature in the tank at 120OF or higher. The temperature of the water after the bypass is increased only 2OF to 5OF, and is ideal for reintroducing back into the pool. See Figure 20, page 29. Also see Figure 27, page 35, for hookup drawing. NOTE: Install only on non-combustible flooring. Engineering Manual

2 1 2 1 2 4 1 1 1

3/4” TEES 3/4” ELBOW 3/4” UNIONS 1 1/2” SHUTOFF VALVE 1 1/2” PIPES - “B” 3/4” SHORT NIPPLES (2”) THERMOMETER HONEYWELL L 4006 A CONTROL CROSS TEE

Note: If chlorinated water is used, the dip tube must be removed from the heater and the drain valve must be used as the inlet.

TABLE 18 Sizing swimming pools, hot tubs, baptistries Factors HEATING TIME IN HOURS

1 2 3 4 5 6 7 8 9 10 12 24 48 72 96

O

20 F RISE

250 120 80 60 48 40 34 30 26 24 20 10 *5 3.4 2.5

O

25 F RISE

300 150 100 75 60 50 42 37 32 30 25 12.5 *6.3 4.25 3.0

30OF RISE

375 180 120 90 72 60 52 45 39 36 30 15 *7.5 5.1 3.75

40OF RISE

50OF RISE

60OF RISE

500 250 160 120 96 80 68 60 52 48 40 20 10 6.8 5.0

625 300 200 150 120 100 85 75 65 60 50 25 12.5 8.5 6.25

720 360 240 180 144 120 102 90 78 72 60 30 15 10.2 7.5

* Most commonly used

Note: For swimming pools, heating periods of 48 to 72 hours are usually acceptable. For baptistries, the heating period is typically five to 12 hours. 29

Loading...

general sizing formula indirect water heater - Bock Water Heaters

GENERAL SIZING FORMULA All requirements for hot water should be totaled to obtain the maximum amount of hot water required per hour. Use multiple wate...

120KB Sizes 43 Downloads 0 Views

Recommend Documents

standard residential gas water heater - A.O. Smith Water Heaters
This oxygen will mix with the gas for a clean, blue flame in the burner chamber and provide dilution air for flue produc

residential gas water heaters - American Water Heaters
ALL TECHNICAL AND WARRANTY QUESTIONS: SHOULD BE DIRECTED TO THE LOCAL DEALER FROM WHOM THE WATER HEATER WAS. PURCHASED.

COMMERCIAL ELECTRIC WATER HEATERS
This manual does not replace or supersede the Instruction Manual that came with the water heater. Always refer to the ..

Water Heater Manufacturer in Pune, Water Heater in Pune
Find Water Heater Manufacturer in Pune, Water Heater Supplier in Santnagar ,Off.Pune- Satara Road, Pune , Pune on bizzpo

use and care manual - Paloma Water Heaters Paloma Water Heaters
symbol alerts you to potential hazards that can kill or hurt you and others. All safety messages will follow the safety

Advanced Water Heater Specification
A list of products that have been tested and found to be compliant to the Advanced Water Heater Specification. This list

Sizing a New Water Heater | Department of Energy
Use the worksheet below to estimate your maximum usage of hot water during this one hour of the day—this is your peak

Apollo Hydro Heat Water Heater Manual - WEB-formula
water heater can be determined from APOLLO How to determine. Hvac repair, ac repair, heater repair -- serving. Choose us

Raypak Commercial Water Heaters - Airskill
5601/AG601 and electrical codes and/or statutory body codes and regulations. INSTALLATION. PROCEDURES -. INSPECTION OF.

Indirect water electrolysis - innoLAB
Hubert H. Girault. Indirect water electrolysis. The EPFL Hydrogen Network .... Hubert Girault. Gaëtan Cherix,. Directeu