5.3102.1 Replacement with Hot Water Boiler

Topic: 
Hydronic Heating (Hot Water and Steam)
Subtopic: 
Equipment Installation
Desired Outcome: 
Proper installation and operation of new boiler
For supporting material, see Referenced Standards and Building America Solution Center.
TitleSpecification(s)Objective(s)
5.3102.1a
Assessment

Confirmation of the scope of work will be made for the following:

  • Clearances
  • Proper drainage in boiler room
  • Flue/chimney conditions
  • Electrical capacity
  • Oil/gas availability
  • Piping connections

Verify scope of work

5.3102.1b
Boiler sizing calculation

Heat load calculations will be confirmed based on ACCA ACCA Air Conditioning Contractors of America, www.acca.org Manual J (for residential applications), Manual N, or ASHRAE ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers, www.ashrae.org equivalent (for commercial applications) and ASHRAE ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers, www.ashrae.org Standard 183 (for high rise application)

Sizing will be confirmed for combined space heating and domestic hot water plant

Enable proper sizing of the heating appliance

5.3102.1c
Low mass selection

Low mass (water volume and heat exchanger) boilers will be selected whenever possible

A primary/secondary piping configuration will be utilized when low mass systems are selected

A low loss header will be utilized for primary/secondary piping configurations

Ensure longer life and improved durability of equipment

Maximize efficiency of system

Reduce short cycling of boiler

5.3102.1d
Multiple boilers/sequencing

Boiler control package will be used for outdoor water reset, lead-lag, and sequencing capabilities

An authorized boiler manufacturer technician will be responsible to set up and demonstrate/ensure optimal sequencing and lead-lag operation

Ensure highest efficiency and performance of the systems

Reduce short cycling of boiler

5.3102.1e
Fuel switching

Chimney will be assessed for proper sizing, lining, and draft

Ensure equipment and system components are compatible with new fuel

5.3102.1f
Hazardous material removal

Health concerns in the removal and replacement of equipment will be identified

Written notification of hazardous material will be provided to the property manager/occupant

Contact information for the regional EPA EPA U.S. Environmental Protection Agency, www.epa.gov asbestos coordinator will be provided

Asbestos abatement will be conducted by an EPA EPA U.S. Environmental Protection Agency, www.epa.gov -certified contractor before decommissioning and replacement

Property manager/occupant will be asked to contract with an EPA EPA U.S. Environmental Protection Agency, www.epa.gov -certified asbestos contractor to conduct asbestos removal

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

5.3102.1g
Decommissioning

Accepted industry procedures and practices will be followed to:

  • Remove old boiler and associated components
  • Seal any unused chimneys
  • Remove unused oil tank, piping, valves, and associated equipment

Ensure worker and occupant safety

Provide timely and efficient removal of old equipment

5.3102.1h
New equipment installation

New boiler and associated components will be installed in compliance with ANSI ANSI American National Standards Institute, www.ansi.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org Standard 5 acceptable procedures and local mechanical codes

Concrete pads will be in accordance with the Uniform Mechanical Code and local building codes

All required operating and safety controls and boiler trim will be installed and set up in accordance with local code and manufacturer's requirements

Water meter will be installed on the makeup water/incoming line to the boiler

Isolation valves will be installed to allow for pressure testing of the boiler

Hydrostatic testing (for site-built boilers) will be performed to confirm there are no water leaks in boiler

Ensure worker and occupant safety

Ensure optimal operation of equipment

Ensure site-built boiler does not leak

5.3102.1i
Flushing of system

Flush valve will be installed at the lowest point

With the boiler isolated and the feed and flush valves open, keep feeding water to the system until drain water runs clear

Protect new and remaining equipment

Conform to performance efficiency

5.3102.1j
Startup/skimming of boiler

When applicable, new boiler will be flushed and skimmed before hot water is released to the building for the first time in accordance with manufacturer specifications

Startup will be performed in accordance with manufacturer specifications

Combustion efficiency and safety testing will be performed at multiple firing rates: at two firing rates for "low- high-low" burners, and minimum three firing rates for fully modulating burners

Post-installation test report will include:

  • Outdoor temperature
  • Draft
  • Carbon monoxide (ambient and in flue gases)
  • Oxygen (in flue gases)
  • Flue temp
  • PH level of boiler water
  • Smoke spot reading
  • For condensing boilers, include corresponding return water temp

Remove impurities

Ensure longevity of equipment

Ensure occupant safety

Conform to performance efficiency

5.3102.1k
Location of circulator

Circulator will be installed in very close proximity of the expansion tank such that it is pumping away from the expansion tank

Reduce maintenance

Improve the efficiency of the system

5.3102.1l
Air separator

Air eliminator, microbubble or standard type, will be installed in accordance with manufacturer specifications

Insulate air and dirt separator

Reduce maintenance

Improve the efficiency of the system

5.3102.1m
Bladder expansion tank

Bladder expansion tanks will be installed in accordance with manufacturer's installation instructions

When replacing a non-bladder type expansion tank with another non-bladder type, no air elimination equipment will be installed that releases air into atmosphere; only an air elimination device that releases air into the tank will be installed

Makeup water feed will be installed to the expansion tank connection

The expansion tank shall be pre-charged, at minimum, to building static pressure before it is connected to the system

Reduce maintenance

Improve the efficiency of the system

5.3102.1n
Education

Completed work will be reviewed with the building/property management team and operations staff

Copies of manuals for boiler and all other installed system components will be given to maintenance staff

Building/property management team and operations staff will be educated on the safe and efficient operation and maintenance requirements of the installed item

Ensure building/property management team and operations staff is informed of the safe, efficient operation and maintenance requirements of the installed item