5.3102.10 Installation of Combined Heat and Domestic Hot Water System (Hot Water)

Topic: 
Hydronic Heating (Hot Water and Steam)
Subtopic: 
Equipment Installation
Desired Outcome: 
Installation of higher efficiency system
TitleSpecification(s)Objective(s)
5.3102.10a
Check for presence of asbestos-containing materials (ACMs)

Potential ACMs will be handled in accordance with SWS 2.0110.2 Potential Asbestos-Containing Materials

Ensure a safe work environment

5.3102.10b
Assessment

Field and site conditions will be verified to determine if scope of work is applicable

Space heating, domestic hot water ( DHW DHW Domestic hot water ) loads, and capacity of new equipment will be verified by a contractor

Ensure optimal system is applied

5.3102.10c
Decommissioning

Existing heating and DHW DHW Domestic hot water components, as identified by the scope of work, will be removed and disposed of in accordance with local codes and regulations

Ensure safe removal and disposal of orphaned equipment Orphaned equipment Condition when one smaller combustion appliance exists after being commonly vented with a larger appliance. What remains is a larger exhaust flue or chimney than is necessary for the remaining smaller appliance

5.3102.10d
Install combined system

Heating water system will be cleaned and flushed

Strainers will be installed on boiler water supply side of indirect tank/heat exchanger and on inlet side of heating pump in accordance with manufacturer specifications

Equipment will be installed in accordance with ANSI ANSI American National Standards Institute, www.ansi.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org Standard 5 or per scope of work and manufacturer specifications, and will include:

  • Boilers
  • New indirect tank or heat exchangers and storage tanks
  • Pumps
  • Controls
  • Expansion tanks
  • Flow controls
  • Insulation

Ensure water system is clean

Properly install system

Ensure worker safety

5.3102.10e
Testing

System will be leak free

Space heating and DHW DHW Domestic hot water system will be tested for proper and safe operation

Performance will be in accordance with manufacturer specifications and confirmed by a contractor

Water flow through the boiler, pressure, operating amperage, and voltage shall be measured in accordance with ANSI ANSI American National Standards Institute, www.ansi.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org Standard 5 or ANSI ANSI American National Standards Institute, www.ansi.org / ASHRAE ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers, www.ashrae.org Standard 111, and adjusted to meet design requirements

The following control strategies will be confirmed by a contractor:

  • Winter and summer modes/ operation
  • DHW DHW Domestic hot water priority
  • Lead-lag/sequencing
  • Modulation
  • Indoor space temperature control
  • Outdoor reset control

Ensure system operates safely and efficiently

5.3102.10f
Education

Property manager will be educated on proper operation and maintenance

Maintain optimal performance