Specifications - City of Montpelier, Vermont

Title:Montpelier District Heating15510 – Hydronic PipingCity of Montpelier, VTIssue Date:September 28, 2012Page #:14 of 143.10 COMMISSIONING5. Add sufficient propylene glycol for 50% glycol solution by weight.Propylene glycol shall be inhibited and specifically designed for use inhydronic systems, DOWFROST or approved equal.A. Fill system and perform initial chemical treatment.B. Check expansion tanks to determine that they are not air bound and that thesystem is completely full of water.C. Before operating the system perform these steps:1. Open valves to full open position.2. Close coil bypass valves.3. Remove and clean strainers.4. Check pump for proper rotation direction and correct improper wiring.5. Set automatic fill valves for required system pressure.6. Check air vents at high points of systems and bleed air completely.7. Set temperature controls so all coils are calling for full flow.8. Check operation of automatic bypass valves.9. Check and set operating temperatures of heating system to designrequirements (refer to drawing schedules).10. Lubricate motors and bearings.END OF SECTION 15510HYDRONIC PIPING 15510 14