Specifications - City of Montpelier, Vermont

Title:Montpelier District HeatingCity of Montpelier, VT019110 – General Commissioning RequirementsIssue Date:October 17, 2012Page #:22 of 30ing individual systems has been achieved, the interface or coordinated responsesbetween systems shall be checked.C. Development of Test Procedures. Before test procedures are finalized, the contractor shall provide to the engineer and the CxA all requested documentationand a current list of changes affecting equipment or systems, including an updatedpoints list, program code, control sequences, and testing parameters. Using thetesting parameters and requirements in the technical specifications, the CxA shallupdate/develop specific test procedures and forms to verify and document properoperation of each piece of equipment and system. Each contractor/subcontractoror vendor, as appropriate, shall provide assistance to the CxA in developing thefinal procedures. Prior to finalization, the engineer shall review and concur withthe test procedure.D. Test Methods.1. Performance testing and verification may be achieved by manual testing orby monitoring the performance and analyzing the results using the controlsystem’s trend log capabilities or by standalone data loggers. The CxAmay substitute specified methods or require an additional method to beexecuted other than what was specified, with the approval of the engineerand Owner/CM. The CxA will determine which method is most appropriate for tests that do not have a specified method.2. Simulated Conditions. Simulating conditions shall be allowed, thoughtiming the testing to experience actual conditions is encouraged whereverpractical.3. Overridden Values. Overriding sensor values to simulate a condition,such as overriding the outside air temperature reading in a control systemto be something other than it really is, is acceptable.4. Simulated Signals. Using a signal generator which creates a simulatedsignal to test and calibrate transducers and DDC constants is generallyrecommended over using the sensor to act as the signal generator viasimulated conditions or overridden values.5. Altering Setpoints. Rather than overriding sensor values, and when simulating conditions is difficult, altering setpoints to test a sequence is acceptable.6. Indirect Indicators. Relying on indirect indicators for responses or performance shall be allowed only after visually and directly verifying andGENERAL COMMISSIONING REQUIREMENTS 01910 22