Unit heater commissioning pre functional checklist

Electrical

Verify proper voltage supply to unit heater

Check all electrical connections for tightness

Ensure all electrical components are properly grounded

Inspect wiring for any signs of damage or wear

Test all safety switches and controls for proper operation

Verify that all electrical panels and covers are securely in place

Confirm that the unit heater is connected to a dedicated circuit with the appropriate amperage

Check for any exposed or loose wires that could pose a safety hazard

Gas

Inspect gas line for leaks

Verify proper gas pressure

Check gas valve operation

Ensure proper gas piping size and configuration

Confirm gas shut-off valve is easily accessible and functional

Test gas igniter for proper operation

Check for proper gas combustion and exhaust ventilation

Ventilation

Verify proper ventilation for combustion gases

Inspect exhaust vent for obstructions

Check combustion air intake for proper flow

Ensure proper clearance around the exhaust vent

Verify that the combustion air intake is not blocked by debris

Check for any signs of backdrafting or improper ventilation

Test the operation of any ventilation fans or dampers connected to the unit heater

Confirm that the ventilation system meets local building codes and standards

Controls

Test thermostat operation

Verify proper sequencing of unit heater components

Check safety switches for proper operation

Verify proper communication between thermostat and unit heater

Test emergency shut-off switch functionality

Ensure proper set-up of timer or scheduling functions

Check for any error codes or malfunctions in control panel

Verify that unit heater responds correctly to temperature adjustments on thermostat

Test remote control functionality (if applicable)

Airflow

Inspect air filters for cleanliness

Verify proper airflow through unit heater

Check blower motor operation

Check for any obstructions or blockages in the airflow path

Measure and record the static pressure of the airflow

Verify that the air distribution pattern is even and reaches all areas of the space

Inspect and clean any dampers or louvers in the airflow system

Check for any leaks or gaps in the ductwork that could affect airflow

Verify that the airflow is within the manufacturer's recommended range

General

Inspect unit heater for any physical damage

Ensure all access panels are secure

Verify proper clearances around unit heater for safe operation.

Check for any loose or missing screws or bolts on the unit heater

Verify that the unit heater is level and stable

Inspect the unit heater for any signs of corrosion or rust

Ensure that the unit heater is properly grounded

Check for any obstructions or debris blocking airflow to the unit heater