This dK servicing sheet is an HVAC annual maintenance checklist for heat pump and hydronic systems. It guides technicians through visual and functional checks including heat exchanger condition, outdoor unit clearance, fan vibration, drain integrity, electrical isolators and terminations, refrigerant operating pressures and leakage, water pressure via manometer, circulating pump performance, flow switch operation, drain tray and hydrobox inspection, DHW tank and valves, thermal protectors, temperature set points, and controller time and day settings. Use it to record issues, note repairs required, and capture comments for building maintenance compliance.
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