hvac preventive maintenance checklist template pdf

Standard Operating Procedure: HVAC Preventative Maintenance Protocol

Document ID: SOP-FAC-HVAC-[]
Version: []
Effective Date: [__________]
Review Cycle: [Annual / Semi-Annual]

1. Purpose & Scope

This procedure defines the technical requirements for routine service of climate control infrastructure at [Company Name]. The scope covers all air handling units (AHUs), condensers, evaporators, and filtration systems located at [Site Name/Location]. Adherence to this protocol ensures operational longevity, regulatory compliance, and indoor air quality standards.

2. Prerequisites

• Tools: Multimeter, manifold gauge set, coil cleaning solution, vacuum cleaner with HEPA filter, fin comb, screwdriver set, torque wrench.
• Materials: OEM-specified air filters, belt replacements, lubricant, refrigerant (if required), [__________].
• Access: Authorized site access badge, lock-out/tag-out (LOTO) kit, master key set for mechanical rooms.

3. Roles & Responsibilities

4. Step-by-Step Procedure

Phase 1: Preparation and Safety

• Verify LOTO procedures are applied to the unit being serviced.
• Confirm [__________] PPE is worn by all technicians.
• Notify [__________] of potential noise or airflow disruption.

Phase 2: Filtration and Airflow

• Inspect and replace air filters; record MERV rating: [__________].
• Clean intake louvers and remove external debris.
• Check blower motor assembly for vibration or signs of bearing wear.
• Adjust belt tension to [__________] lbs/ft; check for fraying.

Phase 3: Coil and Condensate Management

• Inspect evaporator and condenser coils for buildup; clean as required.
• Verify condensate pan is clear of organic growth or obstructions.
• Test condensate pump operation; clear drain line with [__________].

Phase 4: Electrical and Mechanical Systems

• Tighten all electrical connections to [__________] Nm.
• Measure voltage/amperage at the contactor: [] V / [] A.
• Lubricate motor bearings if applicable using [__________] lubricant.
• Verify thermostat calibration against a calibrated reference thermometer.

Phase 5: Final Verification and Sign-off

• Remove LOTO devices and restore power.
• Conduct a 15-minute operational test; verify output temperature: [__________] °F/C.
• Log service completion in the [__________] maintenance database.

5. Quality Assurance, Pro-Tips, and Pitfalls

• Quality Assurance: All readings must be within 5% of manufacturer specifications. Any variance requires an immediate Engineering Change Request (ECR).
• Pro-Tip: Always photograph the coil condition before and after cleaning to maintain an audit trail for insurance and warranty claims.
• Common Pitfall: Over-lubricating motor bearings is a leading cause of premature failure. Follow the manufacturer’s specific grease volume specifications strictly.

6. FAQs

Q: How often should the filters be replaced?
A: Filtration intervals are site-specific. Replace filters every [] days, or immediately if the pressure differential gauge exceeds [] inches of water column.

Q: What should I do if I find a refrigerant leak?
A: Immediately stop work, evacuate the immediate area if the leak is significant, and contact the [Emergency Contact Name/Number] for hazardous material handling. Do not attempt to patch lines without certified EPA 608 training.