- DL manuals
- A.O. Smith
- Water Heater
- 186965-000
- Design Manual
A.O. Smith 186965-000 Design Manual
Summary of 186965-000
Page 1
Printed 0209 186965-001 design information for single and multiple unit installations for residential, commercial, recircula- tion and storage tank systems. On-demand water heater system design manual.
Page 2
2 certifications..................................................................................3 water quality and scale ................................................................8 pump sizing for circulation..........................................................9 tank water heaters in a...
Page 3
3 certified to applicable u.S. Standards for appliances using gas or other petroleum fuel. Certified to applicable canadian standards for appliances using gas or other petroleum fuel. Certified by the uniform plumbing code (upc) certified by national sanitation foundation (nsf), www.Nsf.Org (indoor ...
Page 4: Warning
Consumer information the on-demand water heaters must be installed according to all local and state codes or, in the absence of local and state codes, the “national fuel gas code”, ansi z223.1 (nfpa 54) - current edition. Csa american, inc. National fire protection association 8501 east pleasat vall...
Page 5
In addition to using the lowest possible temperature setting that satisfies your hot water needs, a means such as a mixing valve, should be used at hot water taps used by these people or at the water heater. Mixing valves are available at plumbing supply or hardware stores. Follow manufacturer’s ins...
Page 6
Closed system/thermal expansion caution - property damage hazard as water is heated, it expands (thermal expan- sion). In a closed system, the volume of water will grow. As the volume of water grows, there will be a corresponding increase in water pres- sure due to thermal expansion. Thermal expan- ...
Page 7: Warning
Temperature and pressure relief valve for protection against excessive pressures and temperatures, a temperature and pressure relief valve must be installed in the opening on the on-demand storage tank. This valve must be design certified by a nationally recognized testing laboratory that maintains ...
Page 8
8 water quality and scale a complete water analysis and an understanding of system requirements are needed to protect the on-demand water heaters and water heating systems from scale. Water analysis shows whether water is hard or soft. Hard water, unless treated, will cause scaling or liming of the ...
Page 9
9 pump sizing for circulation 1. Use the chart below or one appropriate for your conditions to determine the heat loss in the length of the hot water supply and return piping. For example, 100 ft of 1-1/2 in bare copper tubing results in a heat loss of 5300 btu/h. 2. Determine the acceptable tempera...
Page 10
10 tank water heaters in a circulation loop the following applies when using a tank water heater (gas or electric) to provide heat for a circulation loop. Drawing h-1-rp is an example. The heat output of the tank must be equal to or greater than the calculated circulation loop heat loss. (reference ...
Page 11
The following applies when using on-demand water heaters to recover a storage tank. Drawing h-1-tc is an example. On-demand water heaters have a pressure loss which must be considered in the system design. Reference the pressure loss curve for the heater model being used to determine the pump size f...
Page 12
12 pressure loss (psi) water flow (gpm) 0. 0 5. 0 10 .0 15 .0 20 .0 25 .0 30 .0 35 .0 40 .0 45 .0 01 234 5 6 789 1 0 1 1 0. 0 10 .0 20 .0 30 .0 40 .0 50 .0 60 .0 pressure loss (ft head) 305 i 505 305 e figure “4” pressure loss curves 100/101 series.
Page 13
13 pressure loss (psi) water flow (gpm) pressure loss (ft head) figure “5” 0 5 10 15 20 25 30 35 40 45 0123456789 10 11 0 10 20 30 40 50 60 70 80 90 10 0 705 505 305 pressure loss curves 200/201 series.
Page 14: H-1
Domestic hot water - standard installation 1 on-demand water heater preferred piping installation drawing number: drawing date: h-1 september 07, 2008 note: this drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended on...
Page 15: H-2
Domestic hot water - standard installation 2 on-demand water heaters preferred piping installation drawing number: drawing date: h-2 september 07, 2008 note: this drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended o...
Page 16: H-3
Domestic hot water - standard installation 3 on-demand water heaters preferred piping installation drawing number: drawing date: h-3 september 07, 2008 note: this drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended o...
Page 17: H-4
Domestic hot water - standard installation 4 on-demand water heaters preferred piping installation drawing number: drawing date: h-4 september 07, 2008 primary hot water supply line cold water supply line gas supply sub 1 sub 2 sub 3 on-demand equipment list qty on-demand 4 water heaters electronic ...
Page 18: H-5
Domestic hot water - standard installation 5 on-demand water heaters preferred piping installation drawing number: drawing date: h-5 september 07, 2008 note: this drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended o...
Page 19: H-6
Domestic hot water - standard installation 6 on-demand water heaters preferred piping installation drawing number: drawing date: h-6 september 07, 2008 note: this drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended o...
Page 20: H-1-E
Drawing number: drawing date: h-1-e september 07, 2008 note: this drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended only as a guide and does not imply compliance with local building code requirements. Confer with l...
Page 21: H-2-E
Drawing number: drawing date: h-2-e september 07, 2008 note: this drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended only as a guide and does not imply compliance with local building code requirements. Confer with l...
Page 22: H-3-E
Drawing number: drawing date: h-3-e september 07, 2008 note: this drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended only as a guide and does not imply compliance with local building code requirements. Confer with l...
Page 23: H-6-E
Drawing number: drawing date: h-6-e september 07, 2008 note: this drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended only as a guide and does not imply compliance with local building code requirements. Confer with l...
Page 24: H-1-Rp
Drawing number: drawing date: h-1-rp september 07, 2008 note: this drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended only as a guide and does not imply compliance with local building code requirements. Confer with ...
Page 25: H-1-Ro
Drawing number: drawing date: h-1-ro september 07, 2008 note: this drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended only as a guide and does not imply compliance with local building code requirements. Confer with ...
Page 26: H-2-Rp
Drawing number: drawing date: h-2-rp september 07, 2008 note: this drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended only as a guide and does not imply compliance with local building code requirements. Confer with ...
Page 27: H-2-Ro
Drawing number: drawing date: h-2-ro september 07, 2008 note: this drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended only as a guide and does not imply compliance with local building code requirements. Confer with ...
Page 28: H-3-Rp
Drawing number: drawing date: h-3-rp september 07, 2008 note: this drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended only as a guide and does not imply compliance with local building code requirements. Confer with ...
Page 29: H-6-Rp
Drawing number: drawing date: h-6-rp september 07, 2008 note: this drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended only as a guide and does not imply compliance with local building code requirements. Confer with ...
Page 30: H-1-T
Drawing number: drawing date: h-1-t september 07, 2008 note: this drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended only as a guide and does not imply compliance with local building code requirements. Confer with l...
Page 31: H-1-Tc
Drawing number: drawing date: h-1-tc september 07, 2008 note: this drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended only as a guide and does not imply compliance with local building code requirements. Confer with ...
Page 32: H-2-T
Drawing number: drawing date: h-2-t september 07, 2008 note: this drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended only as a guide and does not imply compliance with local building code requirements. Confer with l...
Page 33: H-2-Tc
Drawing number: drawing date: h-2-tc september 07, 2008 note: this drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended only as a guide and does not imply compliance with local building code requirements. Confer with ...
Page 34: H-3-T
Drawing number: drawing date: h-3-t september 07, 2008 note: this drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended only as a guide and does not imply compliance with local building code requirements. Confer with l...
Page 35: H-3-Tc
Drawing number: drawing date: h-3-tc september 07, 2008 note: this drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended only as a guide and does not imply compliance with local building code requirements. Confer with ...
Page 36: H-6-T
Drawing number: drawing date: h-6-t september 07, 2008 note: this drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended only as a guide and does not imply compliance with local building code requirements. Confer with l...
Page 37: H-6-Tc
Drawing number: drawing date: h-6-tc september 07, 2008 note: this drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended only as a guide and does not imply compliance with local building code requirements. Confer with ...
Page 38: Mp-01
Drawing number: drawing date: mp-01 september 07, 2008 note: this drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended only as a guide and does not imply compliance with local building code requirements. Confer with l...
Page 39
39 notes.
Page 40
• 500 tennessee waltz parkway • ashland, tn 37015 •.