5.3102.15 Bladder-Type Expansion Tank Pressurization (Hot Water)

Topic: 
Hydronic Heating (Hot Water and Steam)
Subtopic: 
Equipment Installation
Desired Outcome: 
Allow for accommodation for the expansion and contraction of the system fluid
TitleSpecification(s)Objective(s)
5.3102.15a
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
5.3102.15b
Isolate expansion tank

Expansion tank valve will be closed

Existing water will be drained from expansion tank

Remove system pressure from expansion tank and drain tank
5.3102.15c
Repressurize tank

Expansion tank will be repressurized in accordance with manufacturer specification to appropriate system operating pressure

Expansion tank bladder will be replaced in accordance with manufacturer specifications or entire tank will be replaced if unable to maintain required air pressure

System will be refilled and air will be eliminated

Pressurize the tank to standard operating pressure
5.3102.15d
Education

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