Unit installation

START-UP, COMMISSIONING & OPERATING PROCEDURES

GENERAL

The Start-up and Commissioning of units must be carried out by suitably trained and qualified personnel only

preferably by Zamil in accordance with the following instructions. Upon completion of Start-up and Commissioning,

duly filled up and certified check out forms for each unit (sample check out form given in appendix of this manual)

must be forwarded to Zamil Head Office - Dammam in order to avail the warranty.

Do not start the unit before completing start-up and commissioning service.

REQUEST FOR START-UP REPRESENTATIVE

Start-up service is provided by Zamil as optional and should be requested when the units are ordered. When

rendering the start-up service, a representative will be sent to the site upon proper completion of installation.

The contractor/owner should have competent service and operating personnel in attendance to assist in the work

involved and also to be trained in the operation and maintenance of these units.

The representative shall perform the following duties:

• Inspection of installation to verify compliance to all essential requirements.

• Perform the Start-up & Commissioning of units and ensure they are operating satisfactorily.

• Instruct the concerned personnel for the specified length of time as agreed in the contract on proper operation and

maintenance of these units.

Compressor crankcase heaters should be energized a minimum of 12 hours

prior to Start-up. This will ensure that the compressor lubricating oil is warm

enough to vaporize any dissolved refrigerant and that the oil is within the

normal operating temperature range.

PRE-STARTUP REQUISITES

The unit is ready for start-up when the following procedures have been completed:

• Installation is complete and has been thoroughly inspected / verified as instructed earlier in this manual.

• Ensure that all piping has been completed and tested. Water piping and cooler are filled with clean treated water. If

ambient temperatures are expected to fall below liquid freezing point (0

C for pure water) add pre-determined

amount of non-corrosive anti-freeze (Ethylene glycol) to prevent freeze-up.

• Unit has been leak tested, leaks corrected and charging completed.

• Electrical connections are made and properly fused.

• Compressor crankcase heaters have been energized for a minimum of 12 hours.

• Check all refrigerant valves to be sure they are open.

CAUTION