
Installation and Commissioning Guide - Package Commercial Unit
Doc. Part No. 0525-055 Ver. 9 220308
Installation and Commissioning Guide Package Commercial Unit
6
. Installation Instructions
All service technicians handling refrigerant must be licensed to handle refrigerant gases.
Recover and Recycle Refrigerants
Never release refrigerant to the atmosphere! It is an offence in Australia to do so. Always recover, recycle and reuse
refrigerants. When removing from the system, properly contain and identify refrigerants in its dedicated container for
proper disposal and/or storage. Always consider the recycle or reclaim requirements of the refrigerant before beginning
the recovery procedures. Obtain a chemical analysis of the refrigerant if necessary. Refer recovered refrigerant and
acceptable refrigerant quality to existing standards and regulations.
Refrigerant Handling and Safety
Consult the refrigerant manufacturer’s Materials Safety Data Sheet (MSDS) for information on proper handling and to
fully understand health, safety, storage and disposal requirements. Use the approved containment vessels and refer to
appropriate safety standards. Comply with all applicable transportation standards when shipping refrigerant containers.
Service Equipment and Recovery Procedures
Always use refrigerant reclaiming equipment in order to minimise refrigerant emissions. Use equipment and methods
which will pull the lowest possible system vacuum while recovering and condensing refrigerant. Equipment capable of
pulling a vacuum of less than 500 microns is required.
Do not open the system to the atmosphere for service work until refrigerant is fully removed and/or recovered. Perform
refrigeration system evacuation, prior to charging, in accordance with AIRAH / IRHACE Refrigerant handling code of
practice.
Let the unit stand for 1 hour and with the vacuum not rising above 500 microns. A rise above 500 microns indicates a leak
from the system and a leak test is required to locate and repair any leak.
CAUTION
A leak test is always required on any repaired section of the refrigeration system.
Charge refrigerant into the system only after the equipment does not leak or contain moisture. Ensure that R-410A is
only charged in liquid form. Take into consideration the correct amount of refrigerant charge specified for the system
to ensure efficient unit operations. When charging is complete, reclaim refrigerant from charging lines into an approved
refrigerant container. Seal all used refrigerant containers with approved closure devices to prevent unused refrigerant
from escaping to the atmosphere. Take extra care to maintain all service equipment directly supporting refrigerant
service work such as gauges, hoses, vacuum pumps and recycling equipment.
INSTALLATION PREPARATION (Pre-Installation considerations)
The following items must be considered before beginning the unit installation:
• Verify the unit capacities and ratings with the unit nameplate.
• The unit must be installed in accordance with relevant authority regulations
• Make certain the floor or foundation is level, solid and have sufficient structural strength to support the unit and
accessories weight.
• Allow minimum recommended clearances for periodic maintenance and service access.
• Allow sufficient space above the unit for the outdoor air discharge. Condenser air inlet, located on the coil side of the
unit, requires sufficient airflow clearance for the optimum unit performance.
• Note the supply air and return air location. Ensure sufficient spaces are allocated for these purposes.
• Wiring connections must be in accordance with the wiring diagram provided with the unit.
• Make sure all wirings are in accordance with local electricity authority regulations and standards.
• Do not install the unit close to an area where there is a danger of fire due to volatile, explosive, flammable and/or
hazardous materials.
• Ensure that spaces around the unit are free from any obstructions for optimum unit performance.