Heatcraft Condensing Unit LDV1500M6E

Ensure all electrical and refrigerant connections are tight

Observe compressor oil level before start-up

Remove upper mounting nuts on the compressor feet and install neoprene washers

Check and adjust controls if necessary

Check and adjust room thermostat for normal operation

Read and file wiring diagrams and instruction bulletins

Check all fan motors for proper rotation and alignment

Temporarily wire evaporator fan motors for continuous operation

Identify the type of head pressure control system

Dual Valve System — Operation and Adjustment

Adjust ORI valve to maintain discharge pressure

Enter the discharge pressure for medium temperature systems

Enter the discharge pressure for low temperature systems

Ensure sufficient charge to partially flood the condenser

Connect gauges to the discharge port of the compressor

Ensure safe discharge of dry air or nitrogen holding charge

Inspect and check system pressure before charging with refrigerant

Ensure all service valves are open after completing piping connections

Pressurize the system to 150 psig with dry nitrogen or dry CO2

Verify system is still pressurized to 150 psig after 12 hours

Vent nitrogen pressure from the system

Preventive Maintenance Guidelines — Air-Cooled Condensing Units — Quarterly

Visually inspect unit for the following

Check any suspect areas with an electronic leak detector

Describe any leaks found and actions taken

Check condition of moisture indicator/sightglass

Moisture indicator/sightglass condition

Replace liquid line drier if slight presence of moisture is indicated

Replace refrigerant, oil, and drier if high moisture concentration is indicated

Check moisture indicator/sightglass for flash gas

Preventive Maintenance Guidelines — Air-Cooled Condensing Units — Annually

Inspect for leaks and corrosion

Pay close attention to all copper to steel brazed connections

Wire brush all corroded areas and peeling paint

Apply an anticorrosion primer and paint as required