Page 2 - Table of Contents
2 Certifications ..................................................................................3 Water Quality and Scale ................................................................8 Pump Sizing for Circulation ..........................................................9 Tank Water Heaters in...
Page 3 - U P; Approvals
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 - Consumer Information; National Fire Protection Association; Consumer Responsibilities; C) higher or lower at the point; Feel water before bathing or showering.; WARNING; Installation
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 - Site Location; Select a location near the center of the water piping system.; Table “A”
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; For Storage Tank System Installation; CAUTION - PROPERTY DAMAGE HAZARD; Locate the storage; Figure “1”
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-sio...
Page 7 - Temperature and Pressure Relief Valve; IMPORTANT; Explosion Hazard
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 - Water Quality and Scale; For example, for every; IM; BASED ON 10 grains/gal HARDNESS; *Source 2003 ASHRAE Handbook HVAC Applications; Figure “3”
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 whetherwater is hard or soft. Hard water, unless treated, will cause scaling or liming of the h...
Page 9 - Pump Sizing for Circulation; Approximate Heat Loss from Piping at 140 oF Inlet, 70 oF Ambient *; Table “B”
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 - Tank Water Heaters in a Circulation Loop; The heat; Additional Guidelines; On-demand water heaters not recovering a storage tank:; In applications involving a commercial; On-demand water heater recovering a storage tank:; In applications involving a commercial dishwasher,
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 - Pump Sizing for Storage Tank Application; Pump Flow Requirements; Number of; Table “C”
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 - Figure “4”; Pressure Loss Curves
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 - Figure “5”
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 - Water Heater; /4” Cold Water Supply Line; Key
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 onl...
Page 15 - Primary; Cold Water Supply Line
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 on...
Page 16 - P rimar y; Hot Water Supply Line
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 on...
Page 19 - Gas Supply
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 on...
Page 20 - Domestic Hot Water - Optional Freeze Protection
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 lo...
Page 24 - Domestic Hot Water - Circulation Systems; For this application:
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 l...
Page 27 - Pump Sizing for
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 l...
Page 30 - Domestic Hot Water - Backup Storage; Reference the section on
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 lo...
Page 31 - Domestic Hot Water - Backup Storage / Circulation
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 l...
Page 37 - Building
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 l...
Page 38 - Maintenace - Scale Flush Procedure; Circulating Pump
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 lo...
Page 39 - Notes