P r e v e n t a t i v e M a i n t e n a n c e S c h e d u l e

( c o n t i n u e d )

Monthly

❒Inspecting cooling water treatment system

If your chiller uses a cooling water treatment system, maintain proper chemi- cal levels and follow the recommendations of your water treatment specialist. Change water in the reservoir tank monthly to reduce water hardness.

❒Checking electrical connections, amps and volts

Check to ensure the electrical connections are properly seated and that the chiller is operating at its rated amps and voltage. See Description section entitled, Specifications: EarthSmart ECM Series Chillers.

❒Cleaning

Wipe all external surfaces to maintain performance.

❒Inspecting condenser

Check the air-cooled condenser for adequate air flow. Check the condenser face for dirt and clogging. If dirt or clogs are present, clean the condenser. Check, clean and/or replace the filter at the air inlet of the air-cooled con- denser coil, as needed. See Maintenance section entitled, Cleaning the Air- cooled Condenser.

❒Inspecting the control panel

Check for loose wires, burned contacts and signs of overheated wires. Check that all panel lights illuminate. See Maintenance section entitled, Checking Electrical Connections.

❒Checking refrigerant charge and quality

With the compressor running, check the sight glass between the receiver and evaporator for proper refrigerant condition. See Maintenance section entitled, Checking Refrigerant Charge and Quality.

❒Checking the pump strainer.

Check to ensure the pump strainer is not clogged or damaged, replace as needed. See Maintenance section entitled, Cleaning the Pump Strainer.

Annually

❒Cleaning the evaporator

See Maintenance section entitled, Cleaning the Brazed Plate Evaporator.

❒Check refrigerant piping

Verify that no oil is present on fittings or cabinet. Wipe clean and check charge/operation of circuit.

5 e c n a n e t n i a M

M a i n t e n a n c e l 5 - 3