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// CODE SNIPPET

6.7.2.3.3 Hydronic System Balancing

Energy Standard for Buildings Except Low-Rise Residential Buildings 2016 of Illinois > 6 Heating, Ventilating, and Air Conditioning > 6.7 Submittals > 6.7.2 Completion Requirements > 6.7.2.3 System Balancing > 6.7.2.3.3 Hydronic System Balancing
JUMP TO FULL CODE CHAPTER
Hydronic systems shall be proportionately balanced in a manner to first minimize throttling losses; then the pump impeller shall be trimmed or pump speed shall be adjusted to meet design flow conditions.
Exceptions to 6.7.2.3.3
Impellers need not be trimmed nor pump speed adjusted
  1. for pumps with pump motors of 10 hp or less or
  2. when throttling results in no greater than 5% of the nameplate horsepower draw, or 3 hp, whichever is greater, above that required if the impeller was trimmed.

Related Code Sections


6.7.2.3.3 Heating, Ventilating, and Air Conditioning, Hydronic System Balancing
Hydronic systems shall be proportionately balanced in a manner to first minimize throttling losses; then the pump impeller shall be trimmed or pump ...
Energy Standard for Buildings Except Low-Rise Residential Buildings 2016 of Illinois > 6 Heating, Ventilating, and Air Conditioning > 6.7 Submittals > 6.7.2 Completion Requirements > 6.7.2.3 System Balancing > 6.7.2.3.3 Hydronic System Balancing
C408.2.2.2 [CE] Commercial Energy Efficiency, Hydronic Systems Balancing
Individual hydronic heating and cooling coils shall be equipped with means for balancing and measuring flow. Hydronic systems shall ...
2018 Illinois Energy Conservation Code Standards for Privately Funded Commercial Facilities and Standards for Residential Buildings > 4 [CE] Commercial Energy Efficiency > C408 Maintenance Information and System Commissioning > C408.2 Mechanical Systems and Service Water-Heating Systems Commissioning and Completion Requirements > C408.2.2 Systems Adjusting and Balancing > C408.2.2.2 Hydronic Systems Balancing
6.7 Heating, Ventilating, and Air Conditioning, Submittals
Construction documents shall require that all HVAC systems be balanced ...
Energy Standard for Buildings Except Low-Rise Residential Buildings 2016 of Illinois > 6 Heating, Ventilating, and Air Conditioning > 6.7 Submittals
(D) Equipment for General Use, Balancer Sets
Two-wire, dc generators used in conjunction with balancer sets to obtain neutral points for 3-wire systems shall be equipped with overcurrent devices ...
National Electrical Code 2017 of Illinois > 4 Equipment for General Use > 445 Generators > 445.12 Overcurrent Protection > (D) Balancer Sets
(D) Equipment for General Use, Balancer Sets
Two-wire, dc generators used in conjunction with balancer sets to obtain neutral points for 3-wire systems shall be equipped with overcurrent devices ...
National Electrical Code 2020 of Illinois > 4 Equipment for General Use > 445 Generators > 445.12 Overcurrent Protection > (D) Balancer Sets
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