5.3102.34 Steam or Hot Water to Domestic Hot Water Heat Exchanger

Topic: 
Hydronic Heating (Hot Water and Steam)
Subtopic: 
Equipment Installation
Desired Outcome: 
Increased efficiency of domestic hot water ( DHW DHW Domestic hot water ) production
TitleSpecification(s)Objective(s)
5.3102.34a
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

5.3102.34b
Assessment

System schematics, manufacturer specifications, and physical locations will be reviewed to identify proper and serviceable locations

Boiler manufacturer specifications will be reviewed for need of buffer tank; if required, buffer tank will be sized and installed in accordance with SWS 5.3188.2 Adding Mass to Low Mass Boiler - Existing or New

Ensure proper placement of DHW DHW Domestic hot water heater and system components

5.3102.34c
Installation of heater and piping components

DHW DHW Domestic hot water heater will be installed in accordance with SWS 5.3102.1 Replacement with Hot Water Boiler and SWS 5.3102.19 Replacement of Steam Boiler

Thermometers, pressure gauges, steam trap(s) where applicable, and isolation valves will be installed in accordance with applicable standard work specifications: SWS 5. 3102.31 Installation of Thermometers (Includes Hot Water), SWS 5.3102.21 Steam Boiler Pressure Operating Controls (Steam), SWS 5.3103.6 Two Pipe Steam Systems - Steam Traps, SWS 5.3103.7 Installation of Individual and Rendundant Pumps

Pumps and/or zone valves required for integration into distribution system will be installed in accordance with Pump and Zone Valve standard work specifications , sections 5.3104.6 and 5.3102.16)

Properly install heater, piping, and control components

5.3102.34d
Installation of controls

Pumps/zone valves, sensors/aquastats, and regulating valves will be connected to district steam piping, boiler/boiler sequencing controls in accordance with installation requirements; DHW DHW Domestic hot water prioritization will be verified, if applicable

Ensure generation of heat and domestic hot water with domestic hot water prioritization if it is applicable

5.3102.34e
Testing

Contractor will check for internal leaks before putting into service

Water flow through the heat exchanger, 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

DHW DHW Domestic hot water production, distribution system, and delivery temperature will be tested for proper and safe operation

Ensure system operates safely and efficiently

5.3102.34f
Optimization

Control set points will be reviewed for minimum safe boiler operation to provide DHW DHW Domestic hot water

Optimize boiler efficiency

5.3102.34g
Insulate modified system components

All devices requiring service will be insulated with removable and reusable insulation to IECC IECC International Energy Conservation Code and ASHRAE ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers, www.ashrae.org 90.1, at a minimum

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

Reduce energy loss

Maintain safe surface temperature

5.3102.34h
Education

Property manager will be educated in proper operation and maintenance of heat exchanger

Maintain optimal performance