HP Refrigerated Recirculating Chillers User Manual

Page 13

Section 5 - Maintenance

Prepare a schedule to perform these specific maintenance tasks at their recommended intervals.

5.1 Standard Magnetic Drive Centrifugal Pump Motor

When the chiller is used continuously, this pump motor must be oiled every 6 months with SAE 20 oil.
Press the P

OWER

and unplug the chiller. Remove the rear access panel to gain access to the two

oil ports located on the pump motor. Do not apply excessive amounts of oil.

(On models 6105, 6705 and 6155, remove the side panel to access the pump)

5.2 Positive Displacement and Turbine High Pressure Pump Motor

The bearings of the pump, require periodic oiling. Press P

OWER

and unplug the chiller. Remove

the rear access panel to gain access to the pump.

With heavy use, oil every year. With medium use, oil every 3 years. With light use, oil every 5 years.

Use about 150 drops (1 teaspoon) of SAE 20 oil in each bearing.

(On models 6105, 6705 and 6155, remove the right side panel to access the pump)

5.3 Fluid Filter Included With High Pressure Pump

To optimize flow and prevent pump damage due to scale or foreign particles, a filter is included with
the high pressure pump models. How often the filter requires maintenance depends on the
environment and use of the chiller.

To access this filter remove the left side panel. The water filter is located behind the side brace. Grip
the plastic sediment bowl firmly and turn counter-clockwise to remove it. Clean the stainless steel
wire screen found inside and replace it in the filter holder. Do not replace the filter screen unless it is
damaged.

(On models 6105 and 6705, remove the right side panel to access the water filter and pump. On
model 6155, you must remove the top panel in order to remove the side panel. After removing the
side panel, you will have access to the water filter.)

5.4 Refrigeration Air Filter & Air Vents

For maximum cooling efficiency, the condenser and the front and back air vents should be kept free
of dust and dirt. Dirt thermally insulates the condenser coils and reduces the cooling capacity of the
refrigeration system.

Set up a periodic schedule to clean the removable air filter at least monthly. Tap water and mild
detergent is sufficient to clean filter material. Frequency of cleanings depends on the atmospheric
conditions around the chiller as well as length of operating time.