7.8102.6 Point-of-Use Water Heater

Topic: 
Water Heating
Subtopic: 
Installation and Replacement
Desired Outcome: 
Provide a safe and reliable hot water source that meets the needs of the occupant/building management/building operations staff at the lowest possible life cycle cost
For supporting material, see Referenced Standards.
TitleSpecification(s)Objective(s)
7.8102.6a
Hazardous material removal

Health concerns in the removal and replacement of equipment (e.g., asbestos) will be identified

Upon the discovery of hazardous material, written notification and contact information for regional EPA EPA U.S. Environmental Protection Agency, www.epa.gov asbestos coordinator will be provided to appropriate people (e.g., occupant/property manager/building operations staff)

Property manager will be asked to contract with an EPA EPA U.S. Environmental Protection Agency, www.epa.gov -certified asbestos contractor to conduct abatement before decommissioning and replacement (property manager is responsible for abatement or remediation)

Remediate health hazards using EPA EPA U.S. Environmental Protection Agency, www.epa.gov -certified contractors

7.8102.6b
Decommissioning

Decommission the applicable system components by completing the following in accordance with accepted industry procedures and practices:

  • Remove existing water heater and associated components
  • Safely disconnect and secure any abandoned utility (fuel and electric) connections
  • Safely disconnect and secure any abandoned waterlines as close to the main line as possible (avoid deadleg)

Ensure the health and safety of the worker/occupant/building management/building operations staff

Preserve the integrity of the building and services

Remove old equipment in a timely and efficient manner

7.8102.6c
Water supply

The volume and pressure of the water supplied will be sufficient to meet the needs of the water heater

The methods utilized to determine pipe sizes shall be approved by the authority having jurisdiction

Provide sufficient volume and pressure of water to the fixture

7.8102.6d
New equipment installation

Point-of-use water heaters and associated components will be installed in accordance with local codes, accepted industry standards and practices, and manufacturer specifications

Where conflicts occur between the code and manufacturer installation instructions, the more restrictive provisions shall apply

Ensure the health and safety of the worker/occupant/building management/building operations staff

7.8102.6e
Temperature and pressure relief valve

Correct temperature and pressure relief valve will be installed in accordance with manufacturer specifications

Equipment will be connected to properly sized discharge tube and run to a safe location no greater than 6" from the floor or as prescribed by local code (in the absence of local code, as prescribed by UPC)

Safely discharge excessive energy (pressure or temperature) from the water heater to a safe location

7.8102.6f
Dielectric unions (dielectric insulator)

Dielectric unions (dielectric insulator), if needed, will be installed in accordance with manufacturer specifications

Minimize corrosion between dissimilar metals

7.8102.6g
Stray voltage protection

Electrical connection to the water heating equipment should be made per manufacturer's instructions and per NFPA NFPA National Fire Protection Association, www.nfpa.org 70

Break the stray voltage electrical circuit through the appliance

7.8102.6h
Pipe insulation

All piping and fittings will be insulated with fixed insulation to IECC IECC International Energy Conservation Code or ASHRAE ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers, www.ashrae.org 90.1, at a minimum

Reduce loss of heat

7.8102.6i
Power supply

Electric supply components will be installed in accordance with accepted industry standards and codes ( NFPA NFPA National Fire Protection Association, www.nfpa.org 70 for electric); breaker for the circuit on which the heater is installed will be checked for proper ampacity

Provide sufficient power to the water heating element

7.8102.6j
Discharge water temperature

Discharge water temperature will be set not to exceed 120 °F or as prescribed by local code

Install mixing valve when higher storage/generation temperatures are required

Ensure water temperature is low enough to prevent scalding

Ensure water temperature is high enough to inhibit growth of pathogens (e.g., Legionella)

7.8102.6k
Commissioning of system

The following will be checked once the system has been connected and filled:

  • Safety controls
  • Operational controls
  • Water leaks
  • Cycle unit
  • Local code requirements

Manufacturer specifications and all relevant industry standards will be met in commissioning

Ensure the system functions safely and is designed with lowest possible cost of ownership

7.8102.6l
Education

Completed work will be reviewed

Occupant/building operations staff/property manager will be educated on the safe and efficient operation and maintenance of the system, including:

  • Adjustment of water temperature
  • Importance of keeping operating manuals accessible

Educate occupant/building operations staff/property manager about the safe, efficient operation and maintenance of the system