maintenance of hvac system checklist

Climate Control Infrastructure Preventive Maintenance Protocol

Document Control

• Document ID: [__________]
• Version: [__________]
• Effective Date: [__________]
• Review Cycle: [__________]

1. Purpose & Scope

This protocol establishes the mandatory requirements for the inspection, servicing, and performance verification of [Facility Name] HVAC assets. This document applies to all air handling units (AHUs), chillers, boilers, and ventilation systems under the jurisdiction of [Department Name].

2. Prerequisites

• Tools: Digital manometer, thermal imaging camera, refrigerant leak detector, multimeter, HVAC service manifold, [__________].
• Materials: MERV-[__] filters, [] lubricant, condenser coil cleaner, [].
• Access: Security clearance for [Mechanical Room/Roof Access], Master Key [__________], LOTO (Lockout/Tagout) kits.

3. Roles & Responsibilities

4. Step-by-Step Maintenance Procedure

Phase 1: Safety and System Isolation

• Verify LOTO procedures are applied to [Unit ID].
• Confirm electrical disconnect is in the "OFF" position.
• Notify [Building Management/Security] of system downtime.

Phase 2: Airside Inspection

• Inspect and replace air filters; note date: [__________].
• Clean evaporator coils using [Approved Cleaning Agent].
• Clear condensate drain lines and verify pan integrity.
• Check belt tension and condition; replace if wear exceeds [__] mm.

Phase 3: Mechanical and Electrical Verification

• Measure voltage and amperage on compressor motors.
• Inspect contactors for pitting or arc damage.
• Tighten all electrical connections to [__] Nm torque.
• Check refrigerant pressures and log: Suction [] PSI / Discharge [] PSI.

Phase 4: Performance Validation

• Restore power and initiate system startup.
• Measure Supply Air Temperature (SAT): [__] °F/C.
• Measure Return Air Temperature (RAT): [__] °F/C.
• Verify thermostat calibration against [Reference Device].

5. Quality Assurance & Pro-Tips

• Quality Assurance: All readings must be logged in the [CMMS System Name]. Any variance exceeding [__]% from baseline requires a secondary inspection.
• Pro-Tip: Always photograph the filter condition before and after replacement for audit compliance.
• Common Pitfall: Failing to verify the condensate drain pan slope often leads to water damage; ensure a positive pitch toward the drain outlet.

6. FAQs

Q: How frequently should this procedure be executed? A: This protocol is designed for quarterly execution, though high-dust environments may necessitate monthly filter inspections.

Q: What is the required action if refrigerant leaks are detected? A: Immediately cease operation, tag the unit as "OUT OF SERVICE," and notify the [Environmental/Safety Lead] to initiate leak repair and recovery protocols.

Q: Who is authorized to sign off on the final inspection report? A: The [Lead Technician] or [Facilities Supervisor] must provide a signature and date upon completion of all checklist items.