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ST PETERSBURG SECTION 7 GLYCOL CHANGE PROCEDURE CAUTION: This procedure requires that the chiller be energized in order to run circulation pump. Be extremely careful to keep clear of the condenser fans on the chiller and all other moving parts. NOTE: Drain glycol into a used glycol collection drum and dispose of in accordant to State and Local regulations 1. Shut the system down. 2. Open valves VB 112, VB 114 and VB 144 on gas handling skid to drain glycol from the heat exchanger and interconnection piping, open VB 145 to vent glycol piping. 3. Open drain plug on chiller reservoir and allow coolant to drain. 4. Close drain plug on the chiller reservoir. 5. Close valves VB 112, VB 114, VB 144 and VB 145 on gas handling skid. 6. Refill the reservoir above the level of the evaporator using a 50/50 mix of inhibited polyethelyene glycol and distilled water for temperatures between 0 and -40 ̊F. Do not use automotive application coolant. 7. Start the chiller locally. 8. Observe the reservoir level drop. 9. Continue to fill the reservoir as necessary. It will take several minutes for all of the air to work its way from the glycol piping. Vent valves (VB 145) in the interconnection piping may need to be opened to bleed air from the system. 10. Stop the chiller locally 11. Restart the system. Section 7 Maintenance Page 10PDF Image | ST PETERSBURG TABLE OF CONTENTS
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