I. Introduction
Independent heating and cooling sources are located on the roofs of buildings E3/E4/W2, with a total of 11 units currently in operation.
II. Building Automation (BA) System
The BA system allows for real-time online monitoring of the center system's operational data. It also allows for the setting of fault alarm signals, improving the efficiency of fault detection and maintenance.
III. Operation and Maintenance Overview
Weekly: Check the overall unit and water system operating status and record unit operating parameters.
Quarterly: Maintenance content and provide a complete maintenance report:
1) Check and clean the unit's finned heat exchanger and remove dust from the fan impeller;
2) Calibrate the temperature and humidity sensors, tighten electrical connection terminals, and check the compressor lubricating oil level and quality;
3) Test the high and low pressure protection switch action values; test the emergency stop function;
4) Check if the refrigerant distributor is functioning correctly;
Annually:
1) Check if the refrigerant pressure and temperature are normal, perform refrigerant leak detection and refrigerant replenishment if necessary, and ensure refrigerant recovery/charging is standardized (certified operation required, direct discharge is prohibited);
2) Perform chilled water treatment and third-party water quality testing. Water treatment chemicals are supplied by supplier. (For low-temperature chilled water systems, add antifreeze annually based on water concentration (if necessary). Water quality testing must meet the requirements of GB/T 29044-2012.) Water quality requirements for heating and air conditioning systems.
3) Test the functions of safety valves and pressure switches;
IV. Click the link to view the maintenance progress
