General • Maintenance

Manhattan Modular Chiller: Weekly Maintenance

This procedure is the recommended weekly maintenance procedure for your equipment. Performing all maintenance procedures and inspection at the recommended intervals will prolong the life of your chiller and minimize the possibility of malfunctions.

MaintainX

10/24/2021

Manhattan Modular Chiller: Weekly Maintenance

Maintenance

! WARNING

Hazardous Service Procedures!

Failure to follow all precautions in this manual and on the tags, stickers, and labels could result in death or serious injury.

Technicians, in order to protect themselves from potential electrical, mechanical, and chemical hazards, MUST follow precautions in this manual and on the tags, stickers, and labels, as well as the following instructions: Unless specified otherwise, disconnect all electrical power including remote disconnect and discharge all energy storing devices such as capacitors before servicing.

Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. When necessary to work with live electrical components, have a qualified licensed electrician or other individual who has been trained in handling live electrical components perform these tasks.

Periodic Maintenance

Perform all of the indicated maintenance procedures at the intervals scheduled. This will prolong the life of the unit and reduce the possibility of costly equipment failure. All maintenance tasks other than recording data must be performed by a qualified service technician.

Weekly Maintenance

Ensure the unit has been operating for about 10 minutes and the system has stabilized, check operating conditions and complete the checkout procedures that follow.

Check compressor oil levels. Oil should be visible in the sight glass when the compressor is running. Operate the compressors for a minimum of three to four hours when checking oil level, and check level every 30 minutes. If oil is not at proper level after this period, have a qualified service technician add or remove oil as required.
Check suction pressure and discharge pressure.
Check the liquid line sight glasses.
If operating pressures and sight glass conditions seem to indicate refrigerant shortage, measure system superheat and system sub-cooling.
If operating conditions indicate an overcharge, slowly (to minimize oil loss) remove refrigerant at the liquid line service valve. Do not release refrigerant to the atmosphere.
Inspect the entire system for unusual conditions. Use an operating log to record weekly operating conditions history for the unit. A complete operating log is a valuable diagnostic tool for service personnel.

Source: Trane (www.trane.com)

Maintenance

! WARNING

Hazardous Service Procedures!

Failure to follow all precautions in this manual and on the tags, stickers, and labels could result in death or serious injury.

Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. When necessary to work with live electrical components, have a qualified licensed electrician or other individual who has been trained in handling live electrical components perform these tasks.

Periodic Maintenance

Perform all of the indicated maintenance procedures at the intervals scheduled. This will prolong the life of the unit and reduce the possibility of costly equipment failure. All maintenance tasks other than recording data must be performed by a qualified service technician.

Weekly Maintenance

Ensure the unit has been operating for about 10 minutes and the system has stabilized, check operating conditions and complete the checkout procedures that follow.

Check suction pressure and discharge pressure.

Check the liquid line sight glasses.

If operating pressures and sight glass conditions seem to indicate refrigerant shortage, measure system superheat and system sub-cooling.

If operating conditions indicate an overcharge, slowly (to minimize oil loss) remove refrigerant at the liquid line service valve. Do not release refrigerant to the atmosphere.

Inspect the entire system for unusual conditions. Use an operating log to record weekly operating conditions history for the unit. A complete operating log is a valuable diagnostic tool for service personnel.