5.3102.31 Installation of Thermometers (Includes Hot Water)

Hydronic Heating (Hot Water and Steam)
Equipment Installation
Desired Outcome: 
Accurate verification of system operating conditions
For supporting material, see Referenced Standards.
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

Determine locations for thermometers

Available plans will be reviewed to assess system design and intent

Thermometer locations and conditions will be visually verified; thermometers will be located on the inlet and outlet of all heat transfer devices (e.g., boilers, heat exchangers, and coils) and the supply and return to all distribution loops

Determine minimum thermometer placement

Select appropriate thermometer (thermowell vs. strap-on)

Thermometer selection will be provided for accurate measurement with rapid response to temperature change

Strap-on thermometers will be an option for copper piping applications

Thermowell thermometers will be used in applications where piping diameter is 4" or larger

Ensure selected thermometer provides accurate temperature measurement with rapid response

Install thermowell when necessary

Nearest valves on either side of thermowell location will be closed

Thermowell will be installed and extend midway into fluid flow

System will be refilled and air will be eliminated

Properly install thermowell

Install thermometer

Strap-on thermometers will be attached tightly with heat transfer grease applied between sensing element and pipe

Thermowell thermometers will be installed with heat transfer grease between sensing element and thermowell

Thermometers will be installed facing in such a manner so that minimum effort is required to read it

Properly install thermometers in selected locations

Reinsulate area

Where insulation was removed, sensing element and associated piping will be reinsulated with new 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


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