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Documents & Manuals

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Tensioning Guide
Belt-diagram
C-120 pulleys
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Work Order Templates

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Daily Electrical System Inspection
Replace Roller and Pulley
Install Engine B-120
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Procedures

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Motion Industries
Applied Industrial Technologies
Electrical Brothers
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Parts

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Drive Motor
B2 Rollers
Tensioning System
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Daikin Screw Chiller AWV028

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Maintenance Plans for Daikin Screw Chiller Model AWV028

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Screw Chiller Lubrication

Warning: This procedure requires trained personnel with PPE!

Fan motor bearings are permanently lubricated. No further lubrication is required.

Excessive fan motor bearing noise is an indication of a potential bearing failure.

POE type oil is used for compressor lubrication. This oil is extremely hygroscopic.

Avoid prolonged exposure of refrigerant to the atmosphere to prevent moisture absorption.

CAUTION: Handle POE oil carefully using proper protective equipment. Avoid contact with certain polymers.

Do not use oil or refrigerant additives to the system.

Select the manufacturer’s recommended oil

The compressor oil heater is 250 watts and is on when the compressor is off and off when the compressor is on.

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Screw Chiller Pre-Start Check

Chilled Water:

- Piping Complete

- Water strainer installed on evaporator, 0.125” (3.2mm) or smaller perforations

- Water System filled, flushed and vented

- Pumps installed and operational (rotation checked, strainers cleaned)

- Controls operational (3-way valves, face/bypass dampers, bypass valves, etc.)

- Water system operated and tested; flow meets unit design requirements

- Flow switch installed and wired

- Vent installed on evaporator

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3 Monthly Epoxy Coated Coils Cleaning

Warning: This cleaning procedure requires trained personnel with PPE!

Is the coil free of surface debris?

Upload a photo of the coil before cleaning

Select the cleaning agent used

If grease or oil film is present, it should be removed with the approved cleaning agent before applying CHLOR*RID DTS

Was the entire coil surface thoroughly wetted with the cleaning agent?

Upload a photo of the coil after cleaning agent application

Was the coil rinsed properly?

Upload a photo of the coil after rinsing

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Oil Filter Disassembling

Prior to this procedure, pump out the compressor. Isolate the electrical supply to the control panels and compressor motor terminal. Filter should be changed when pressure drop delta goes above the linear line in Figure 74.

WARNING:

After the compressor has been pumped down and isolated, the oil contained inside the filter housing will remain hot enough to cause burns for some time afterwards. Always allow sufficient time for the oil to cool down so that it is cool enough not to be a danger when drained off (less than 35°C is recommended). Severe injury from burns can result.

Oil filter assembly components are:

- Oil Filter – 250mm

- Oil Filter Housing Cover

- O-Ring – 89.5x3

- O-Ring – 76.1x3.4

- (6) M8 Bolts

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1 Yearly Screw Chiller Maintenance

Annual (or spring startup) operations include all weekly and monthly operations.

General:

- Inspect thermal insulation for integrity

- Clean and paint as required